Two cases have been prepared for yearly average seasonal conditions:

Transcripción

1 MEMO 00-28B Author Magnus Ivarsbacke Phone Mobile Recipient Arauco y Constitucion MAPA Date 16/11/2018 Project ID Arauco Line 3 Energy Balances 1 Summary This memo summarizes the energy balance for the new Line 3 in the Arauco mill MAPA project. Energy balances have been prepared with basis on, up to the memo-date, available information from contracted suppliers performance and/or guarantee values and experience and references from similar projects. Two cases have been prepared for yearly average seasonal conditions: - a case for the average production level of 4237 ADt/d - a case for the MCR production level of 4700 ADt/d A summary of key data is presented below. Table 1. Summary key data energy balance L Average MCR Power consumption L3 MW Power generation L3 MW of which backpressure MW of which condensing MW Power export L3 MW Biomass to PB5 tds/d of which internal tds/d of which external tds/d The yearly average power export from L3 is estimated to 1100 GWh/year. In combination with L2 power surplus, the net total power surplus from the Arauco site is estimated to 1350 GWh/year. ÅF Industry AB, Kungsängsgatan 18A, Box 1415, SE Uppsala Sweden Phone , Registered office in , Corp. id. A480506, VAT - Memo 00-28B Energy balances L rev1.docx Page 1 (10)

2 MEMO 00-28B 2 Preconditions 2.1 Mass balance The energy balances are based on the millwide mass balances for L3 described in Memo 00-23B dated , by Janice Törmälä. The following table summarizes the mass balance output used in the energy balance; Table 2. Mass balance preconditions for the energy balance ID Average MCR Yearly pulp production ADt Operating days Days Mill availability - 1,0 0,90 Deknotted unscreened pulp from digester ADt/d Oxygen stage ADt/d Bleached pulp ADt/d Drying machines ADt/d Oxygen plant t/d ClO2 plant t/d Wood dryness % Digester yield % 54,0 54,0 Recovery boiler, dry solids tds/d Recovery boiler, firing liquor dry solids %DS 80,0 80,0 Higher heating value of virgin DS MJ/kgDS 13,44 13,44 Lower heating value of virgin DS MJ/kgDS 11,24 11,24 Evaporation plant, incl. spills t-evap/h Treated ash t-ash/d Debarked logs to mill % Internal biomass from wood handling to power boiler - Euca wood ktds/a Euca bark ktds/a Memo 00-28B Energy balances L rev1.docx Page 2 (10)

3 MEMO 00-28B 2.2 Process precondtions Fiberline Woodyard Andritz is the selected woodyard supplier for the debarking line and the on-site chipping of external debarked logs, as well as internal biomass handling including bark presses and external biomass reception. The power consumption for the woodyard is divided on what is related to the pulping and biomass boiler respectively. No primary heat consumption Digester Andritz is the selected digester, brownstock washing and fiberline supplier. The digester is equipped with indirect LP- and MP-steam economizers for the liquor transfers as well as a condensate reboiler to chip bin pre-steaming, to achieve good steam economy and highest possible dryness to the evaporation plant. At normal operation, only reboiler condensates are fed to the chip bin, without addition of LPsteam. MP-steam is fed to digester top for direct heating. The final digester heat and mass balance at 50% wood dryness is not ready at time of this memo. However, estimates have been performed Condensates from the digester plant are led to the integrated stripper in the evaporation plant Oxygen stage and bleaching plant Low primary heat consumption for the oxygen stage and bleaching plant, both in bleaching stages and for hot water generation, is a result of advanced and efficient secondary heat system. Secondary heat is recovered from bleach plant effluent with final top-heating in dual weak black liquor coolers, which is transferred to the bleach plant hot water system. ClO2 to bleach plant is preheated by bleach plant effluent Drying machines Valmet is the selected supplier for 2x2500 ADt/d drying machines. Final dryness after presses is guaranteed to 51,5%. Low pressure steam consumption in both wet end water heating (direct) and in dryer. Steam condensates are cooled and flashed for heating of incoming air to dryer. Power consumption includes besides the drying machines also final baling lines and storage Oxygen plant Supplier for the over-the-fence oxygen plant is not decided at time of this memo. Power consumption estimate is based on discussions with vendors and other plant data ClO2 plant Supplier for the ClO2-plant is not decided at time of this memo. Basis used for balances is Akzo Nobel. Memo 00-28B Energy balances L rev1.docx Page 3 (10)

4 MEMO 00-28B In order to decrease chiller power consumption, the incoming absorption water to ClO2-plant is precooled by outgoing solution to bleach plant. Only LP-steam consumption in reboiler since selected base is vacuum pump based process. Recovery area Evaporation plant Andritz is the selected supplier for the evaporation and methanol plant. 7 stage evaporation with superconcentrator to 80%DS firing liquor. Main steam consumption with LP and superconcentrator with MP. Low live steam condensate losses is foreseen. In the mass balance, it is assumed that spills are added to spill tanks with 0,5 m3/adt Ash treatment Supplier for the ash treatment-plant is not decided at time of this memo. However, the process selected is crystallization and bids from HPD and Andritz is used in estimating the power and heat consumption. The selected process includes MVR-fans and consequently the primary heat consumption is low and power consumption high Recovery boiler Valmet is the selected supplier for the recovery and biomass boiler. Recovery boiler 3 is rated at 6300 tds/d & HHV 14,0 and is of high energy efficiency type with high steam data (106 bar(g) 495 C) with advanced combustion air and demin/feed water preheating. Strong malodorous gases and methanol from the pulping line is incinerated in the recovery boiler, as well as the DNCGs from different mill areas. Feed water from pumps is 142 C and is preheated to 165 C with MP-steam (+23 C). Feed water is thereafter interheated +27 C with MP2-steam between the economizers. All combustion air is preheated in three stages with first stage from flue gas cooler water circuit to ~130 C. Second stage with MP-steam to ~154 C and third stage to 205 C. DNCGs fed to the boiler are also preheated with steam. Sootblowing steam is led from TG7 to the boiler at normal operation. At TG7 down, internal soot blowing steam is taken from the superheaters. No PRV from HP-MP2 is installed, which implies that the top air and FW-preheaters will be out of operation at TG7 down. Demin preheating is performed on the mixed stream of process/tg condensates and demin water from the treated water storage tank after mixed bed filters. This stream passes initially the common continuous blow down cooler for PB5/RB3 and thereafter the dissolving tank vent gas condenser. A good operating system will supply a temperature of well above >80C after the vent gas condenser. As final demin water preheating, heat surplus from the flue gas cooler water circuit, that is not transferred to the air preheaters, is utilized. Therefore, the guaranteed temperature after flue gas coolers of 131 C will not only be utilized for boiler internal preheating, but also externally to the demin water, which will increase the condensing power generation. The recovery and power boiler share common feed water tank. Continuous blow down from both boilers is recovered to MP and LP-headers and final cooled to demin water (as described above). No heat recovery from the feed water tank deaerator vent steam was decided. Memo 00-28B Energy balances L rev1.docx Page 4 (10)

5 MEMO 00-28B The recovery boiler has an own internal desuperheater for the MP2-air preheaters. This is the only steam flow that is desuperheated in normal operation. See below regarding turbine efficiencies Power boiler Power Boiler 5 is a bubbling bed biomass boiler of so called high energy efficiency type. High steam data at (106 bar(g) 495 C) with advanced feed water preheating. Feed water from pumps is 142 C and preheated to 160 C with MP-steam (+20 C). Feed water is directly thereafter preheated +25 C with MP2-steam, with final 185 C entering the economizers. Minor air preheating with LP-steam is foreseen depending on fuel dryness. Only internal sootblowing was decided. All internal biomass residues from L3 is together with primary+secondary sludge from L2/L3 incinerated in the boiler. To balance the steam generation, forest residues are purchased externally. DNCGs can at upset conditions in the recovery boiler be led to the biomass boiler. For energy economy reasons within the whole Arauco mill, power boiler 5 should always be maximized when any of the other boilers are reduced. The boiler is designed for 160 MWth and 40%DS biomass fuel mixture of eucalyptus, sludge and external forest residues (mostly softwood, part is euca). At winter time, the boiler would most probably operate close to this design value Recausticizing and lime kilns Andritz is the selected supplier for the white liquor plant. Two lime kilns of 700 t/d each is installed together with one m3wl/d causticizing. The lime kiln is fired with fuel oil in the base case, but is prepared for natural gas firing. A future option is biomass firing, as gasified wood or wood powder. Efficient water and B-condensate handling in the causticizing implies low steam consumption for water heating purposes. No detailed water balance is available at the time of this memo while steam for water heating is roughly estimated Water and boiler feed water treatment Veolia is the selected supplier for the water treatment lines. The demin water treatment is of anion/cation type with 4 x 214 m3/h, along with 5 x 360 m3/h mixed bed filters. Incoming fresh water to the demin lines is preheated to 25 C with evaporation plant warm water 50 C. Steam condensates from the boilers (PB5+RB3) are flashed to MP and LP-net before being pumped to the main condensate tank. Process condensates are led to the pressurized main condensate tank, thereafter cooled and polished in filters before entry to the mixed bed filters. At upset conditions for the condensate cooler, the process condensate may be cooled in an emergency cooler. TG-condenser condensates are led non-preheated but polished to the mixed bed filters. The mix water is stored in a common 2400 m3 treated water storage tank. Treated water is divided in two streams, where the first stream is reheated by incoming process condensates and the second stream is available for demin water preheating (see above). See attached energy balance diagrams for a schematic view of the condensate system. Memo 00-28B Energy balances L rev1.docx Page 5 (10)

6 MEMO 00-28B Turbogenerators Siemens is the selected supplier for the turbogenerators TG MW) and TG8 (extraction/condensing MW). Both turbogenerators are connected to the common HP-header for the boilers. TG7 has extractions to MP2 for boiler sootblowing and air/fw-preheating and MP for process. Backpressure is to LP-header. TG7 is designed to control the frequency in island mode, when power loads on both bus 7 and 8 are connected to TG7. TG7 will at normal operation control MP2 and MP-headers while maximizing inlet steam admission valve without opening overload = rest goes to LP. TG8 has extraction to LP and will be the main steam balancing unit. The cooling water flow is fixed at t/h and the TG-set is designed for 20 C cooling water. Vacuum pump based evacuation system implies no steam for ejectors. Total gland steam losses in the turbines is in the order of 500 kg/h expressed as HPsteam. At normal operation, very low or zero steam desuperheating is required, due to high efficiency turbines. The guaranteed power output correlates to isentropic efficiencies of up to 94%, which is considered high. Maximum extraction and condensing capacities for the turbogenerators are given in the energy balance diagram Dump condenser It is presumed that the dump condenser at 160 t/h, included in the prefeasibility studies 2012 and 2016, is deleted from the scope. The dump condenser was earlier designed based on three line demin operation and long term operation with both turbogenerators out of operation. The main reason is that a fourth demin line was purchased, which removes the incentive of dump condenser installation even at extreme upset conditions. See more discussion in memo Millwide services and effluent Compressed air The compressed air station is not purchased as time for this memo. Estimates on power consumptions yields ~1.5 MW at MCR Cooling tower and water distribution A common cooling tower provides mill water and cooling water to both process and TG condenser. Estimates on pumping requirements and cooling tower load have been performed based on water balance (see memo 00-32) and selected cooling water flow in TG8. All power consumption related to incoming water to L2+L3 is allocated to L3 energy balance Effluent treatment The effluent treatment is mainly common for L2 and L3, but have separate primary clarifiers. The L2+L3 effluents are mixed in mix tank in L3 effluent treatment before netrualization. Pumping to cooling tower and secondary clarifiers. Memo 00-28B Energy balances L rev1.docx Page 6 (10)

7 MEMO 00-28B The power consumption of the common effluent treatment, except L2 primary clarifier, is allocated to L3 energy balance. 3 Results The main results from the balances are presented below. For detailed balance and diagrams, see attachments. Table 3. Main result table energy balances L kt/a 1500 kt/a Average MCR Steam generation Recovery Boiler 3 [t/h] Power Boiler 5 [t/h] Desuperheating and recovered flash steam [t/h] Total [t/h] Steam consumption MP2 steam [t/h] MP-steam [t/h] LP-steam [t/h] Condensing+gland steam [t/h] Total [t/h] TG7 HP-steam [t/h] MP2-steam [t/h] MP-steam [t/h] LP-steam [t/h] Power generation [MW] TG8 HP-steam [t/h] LP-steam [t/h] Condens [t/h] Power generation [MW] of which cogeneration [MW] of which condensing [MW] Total power generation [MW] Total power consumption [MW] Power export [MW] STEAM HEADER BALANCES MP2-header IN TG7 [t/h] Desuperheating [t/h] TOTAL [t/h] OUT Soot blowing RB3 [t/h] Air preheating RB3 [t/h] Feed water preheating RB3 [t/h] Feed water preheating PB5 [t/h] TOTAL [t/h] Memo 00-28B Energy balances L rev1.docx Page 7 (10)

8 MEMO 00-28B 1500 kt/a 1500 kt/a Average MCR MP-header IN TG7 [t/h] PRV HP-MP [t/h] Desuperheating [t/h] Flash steam [t/h] TOTAL [t/h] OUT Air preheating Recovery boiler 3 [t/h] Feed water preheating Recovery boiler 3 [t/h] Feed water preheating Power boiler 5 [t/h] Digester top (direct steam) [t/h] Digester circulation heater MP, flash t. chip bin [t/h] Oxygen delignification [t/h] Evaporation plant, superconcentrator [t/h] Black liquor direct heater, RB [t/h] Spout atomizing steam [t/h] Miscellaneous, losses, unaccounted [t/h] Chemical Plant (ejectors) (vendor not decided) [t/h] PRV MP-LP [t/h] TOTAL [t/h] LP-header IN TG7 [t/h] TG8 [t/h] PRV HP-LP [t/h] PRV MP-LP [t/h] Desuperheating [t/h] Flash steam [t/h] TOTAL [t/h] OUT Air preheating DNCG Recovery boiler 3 [t/h] Air preheating Power boiler 5 [t/h] CNCG ejectors [t/h] MeOH plant [t/h] Digester chip bin [t/h] Digester circulation heater LP, flash t. chip bin [t/h] Bleaching and hot water [t/h] Evaporation, 7 effects, integr. Stripper [t/h] Ash treatment, crystallizer (no vendor decided) [t/h] ClO2 plant reboiler (vendor not decided) [t/h] Chemical Plant (absorption chiller) (vendor not decided) [t/h] Causticising, water heating [t/h] Drying machine, dryer, after cond. cooler [t/h] Memo 00-28B Energy balances L rev1.docx Page 8 (10)

9 MEMO 00-28B 1500 kt/a 1500 kt/a Average MCR Drying machine steam box+process heating [t/h] White water pit heating + ceiling flushing [t/h] Miscellaneous, losses, unaccounted [t/h] Dump condenser [t/h] Blow off steam [t/h] To feed water tank 1 [t/h] TOTAL [t/h] Flow to/from main condensate tank [t/h] Demin water consumption [t/h] TG8 condenser condensates [t/h] Flow in mixed bed filters [t/h] Condensate reheater/cooler heat transfer [MW] SPECIFIC HEAT Recovery boiler 3 [GJ/ADt] Power boiler 3 [GJ/ADt] Secondary heat and FW-pumps [GJ/ADt] Total generated Process heat consumption [GJ/ADt] whereof digester and fiberline [GJ/ADt] whereof drying machines [GJ/ADt] whereof evaporation plant [GJ/ADt] whereof Recovery and Power boiler [GJ/ADt] whereof caustizing and lime kiln [GJ/ADt] whereof chemical plant [GJ/ADt] whereof miscellaneuos and losses [GJ/ADt] Heat for power generation [GJ/ADt] Total consumed [GJ/ADt] POWER CONSUMPTION Woodyard [MW] Biomass boiler fuel handling [MW] Cooking [MW] Brown stock and Bleach plant - 746/747 [MW] Drying machines and finishing line - 772/781 [MW] Water treatment, cooling towers & distribution [MW] Effluent treatment (common primary) [MW] Recovery boiler (incl. feed water pumps RB3/PB5) [MW] Causticizing & Lime kiln - 754/753 [MW] Evaporation plant [MW] Ash treatment, crystallizer - 751/752 [MW] Power boiler 5 (excl. feed water pumps) [MW] Turbine plant TG7/TG8-765 [MW] TG8 cooling towers and pumping [MW] Feed water treatment [MW] Chemical plant [MW] Air Compressors [MW] Oxygen plant [MW] Miscellaneous, losses [MW] Common water intake and pumps (L2+L3) [MW] Memo 00-28B Energy balances L rev1.docx Page 9 (10)

10 MEMO 00-28B 1500 kt/a 1500 kt/a Average MCR Effluent treatment (common secondary) [MW] Miscellaneous, losses [MW] Total consumption for pulp mill (Line 3) [MW] Specific power generation [kwh/adt] Specific power consumption [kwh/adt] Specific power export [kwh/adt] Memo 00-28B Energy balances L rev1.docx Page 10 (10)

11 Magnus Ivarsbacke Forest Industry Energy Balance - Line 3 Average production level

12 Arauco Line 3 Steam distribution and power generation Average production level calc.case: C t/h C t/h Digester department 4456 ADt/d 40.0 t/h 40.0 t/h 27.0 bar(a) C Oxygen delignification 4365 ADt/d 0.0 t/h Soot blowing Bleach plant 4237 ADt/d bar(a) bar(a) 0.0 t/h 0.0 t/h t/h t/h Drying machine 4237 ADt/d Max=590 t/h Max=925 t/h Recovery 40.0 t/h Power 0.5 t/h bar(a) bar(a) Dry solids produced 5742 tds/d boiler 3 boiler C C Ditto tds/adt bleached Bl. liq MW Air preheating Bark/sludg MW Air preheat CNCG 3.8 MW 15.6 MW C MP2 Oil 0.0 MW 1.7 MW Evaporation plant: Inlet incl. spills MeOH 10.6 MW 8.8 MW C MP 0.0 t/h 0.0 t/h Conc. in / out 13.5% / 80.0% Oil / gas 0.0 MW 1.8 MW - LP (DNCG) Sum MW Evaporated water, t/h 1475 Sum MW C FGC Fuel 991 tds/d Heat economy, MJ/t evap 396 TG8 TG C LHV 17.1 GJ/tDS Drying machines: Black liquor Moist. mix 51.8% Sludge (prim/sec) Cons. in / out 51.5% / 90.0% Effic: 91.1% 5742 tds/d 80.0% Effic: 87.5% 41 tds/d MW MW Evaporated water t/h C +117 t/d NCG & MeOH C 25%DS 0.0 t/h (Max= t/h (Max= MW)Specific consumpt. t/t-evap MW MP2 6.2 MW MP2 (Overload) 171 MW) Max=180 t/h 197 C 6.1 t/h 5.0 bar(a) C Consumption (Bus 7) 37.5 MW Flue gas (Eco 1) C 92.3 t/h bar(a) 10.9 bar(a) 5.0 bar(a) 91.2 MW 165 C 4.3 MW MP Max=252 t/h t/h C C Power export (T9) 26.5 MW MP 2.1 t/h t/h C Max=479 t/h t/h x= MW 142 C x= C Max=265 t/h t/h t/h x= Max=509 t/h 0.0 MW 0.8 t/h Cont. blowdown 16.8 t/h 32.2 C Consumption (Bus t/h t/h 4.9 MW 9.9 t/h 25.0 C MW Power export (T10) Pre t/h Pre C Pre- FW+Air pre- Blow-off MW 94.8 C heat C heat. heat. heat 0.0 t/h Heat consumed: MW GJ/ADt 6.6 MW 25.3 MW 1.1 MW Drain 34.8 C MP2 Process heat Flue gas cooler Vent gas cond C t/h 27.0 bar(a) 92.6 t/h Dump cond, blow-off surplus heat C Heat for power MP 9.5 bar(a) t/h Total heat consumed Blow down-tank 0.8 t/h 38.9 C C Heat generated: 1.0 t/h 79.3 t/h 78.5 t/h 0.0 t/h Power boiler LP 4.3 bar(a) t/h Recovery boiler C Secondary heat etc Total heat generated t/h 2.4 t/h Electrical balance: MW kwh/adt In boiler Pulp Mill (Bus 7 & 8) MW/ C 0.0 t/h building Total generated Feed water tank dt: 6.0 C In RB3-building Surplus (L3 only) Mixed 1117 t/h t/h C 0.0 t/h Surplus (L3+L2) t/h bed 36.9 C MW 6.8 t/h 5.7 t/h 5.3 MW C MP t/h C MP 66.3 t/h 0.0 t/h 36.9 C t/h Make-up t/h t/h 148 C LP 6.1 t/h water 4x215 t/h t/h Cooler RB3-PB5 air- & FW -preheater condensates 18.0 C C Demin 42.0 C C MP+LP t/h MW t/h plant t/h MW C Condensate from mill and dump condenser Cond. 8.9 t/h tank Magnus Ivarsbacke,

13 Celulosa Arauco y Constitución S.A. Planta Arauco, Line 3 Average production level Productions Operating days d/a 354 Availability Yearly pulp production ADt/a Digester ADt/d 4456 Oxygen delignification ADt/d 4365 Bleach plant ADt/d 4237 Dried pulp ADt/d 4237 ClO2-plant t/d 38 Oxygen plant t/d 76 Treated ash in crystallizer t/d 131 Energy background data Water conditions: bar(a) C kj/kg Demineralized water temperature Secondary water stream from mixed bed filters, temp. after preheating, sec. heat Feed water temperature in tank Steam data: Recovery boiler 3 HP steam Recovery boiler 3 soot blowing steam (internal) Recovery boiler 3 blow down water Power boiler 5 HP steam Power boiler 5 soot blowing steam (internal) Power boiler 5 blow down water HP system MP2 system MP system LP system Recovery boiler fuel: Black liqour MeOH CNCG Total Specific virgin DS flow totally to recovery boilers tds/adt On digested pulp tds/adt On bleached pulp Virgin DS flow to recovery boilers tds/d Gross heat value of dry substance, HHV MJ/tDS Net heat value of dry substance, LHV MJ/tDS Fuel dryness Net heat value of wet fuel etc MJ/tDS Efficiency calculated on wet fuel Heat output, specifically MJ/ADt Total transferred to the steam system MW Bark conditions incl. wood losses: Euca wood Sludge Euca bark (L2+L3) External Total Average specific DS flow tds/adt DS flow to bark boilers tds/d Net heat value of dry substance, LHV MJ/tDS Dryness Net heat value of wet fuel MJ/tDS Efficiency calculated on wet fuel Transferred to the steam system, specifically MJ/tDS Transferred to the steam system MW Oil to boilers: Burned oil t/d 0.0 Transferred to the steam system MW 0.0 Net heat value, LHV MJ/t 40600

14 Celulosa Arauco y Constitución S.A. Planta Arauco, Line 3 Average production level Steam and heat balance Department Steam Condensate Condensate Heat Specific Specific production flow flow temp. cons. steam heat (unit/d) t/h t/h C MW kg/unit MJ/unit Miscellaneous from the boilers Recovery boiler soot blowing steam (internal) 5859 tds/d Power boiler soot blowing steam (internal) 991 tds/d Recovery boiler 3 blow down water 985 t/h Power boiler 5 blow down water 208 t/h Total miscellaneous from the boilers HP system Department Steam Condensate Condensate Heat Specific Specific production flow flow temp. cons. steam heat (unit/d) t/h t/h C MW kg/unit MJ/unit Condensing turbine TG8 Condensing turbine TG8, gland leakage LP steam (92.3) 17.2 Condensing steam (275.9) 90.5 Sum (368.6) Heat released in condenser Back pressure turbine TG7 Back pressure turbine TG7, gland leakage MP2 steam (130.3) 10.8 MP steam (166.9) 24.7 LP steam (509.0) 94.5 Sum (806.5) Small direct drive turbines Released in HP-steam turbine driven FW-pump (0.0) 0.0 PRV direct reducing to MP2 (0.0) PRV direct reducing to MP (0.0) PRV direct reducing to LP (0.0) Process heat consumption HP steam system heat losses 0.3 For power generation Totally consumed in HP system Total steam flow in HP system Department Steam Condensate Condensate Heat Specific Specific production flow flow temp. cons. steam heat MP2 system (unit/d) t/h t/h C MW kg/unit MJ/unit Air preheating Recovery boiler 5859 tds/d (15.6) Feed water preheating recovery boiler 5859 tds/d (32.5) Feed water preheating Power boiler tds/d (6.2) Soot blowing Power boiler tds/d Soot blowing Recovery boiler (incl. FGC) 5859 tds/d Totally consumed in MP2 system

15 Celulosa Arauco y Constitución S.A. Planta Arauco, Line 3 Average production level MP system Department Steam Condensate Condensate Heat Specific Specific production flow flow temp. cons. steam heat (unit/d) t/h t/h C MW kg/unit MJ/unit Air preheating Recovery boiler tds/d (8.8) (62) (130) Feed water preheating Recovery boiler tds/d (26.5) (179) (390) Feed water preheating Power boiler tds/d (4.3) (184) (379) Digester top (direct steam) ADt/d Digester circulation heater MP, flash t. chip bin ADt/d Oxygen delignification ADt/d Evaporation plant, superconcentrator t-evap/h Black liquor direct heater, RB tds/d Spout atomizing steam tds/d Miscellaneous, losses, unaccounted ADt/d Chemical Plant (ejectors) (vendor not decided) 38 tclo2/d Direct reducing to LP (0.0) Totally consumed in MP system For power generation (0.0) Process Total steam flow in MP system LP system Department Steam Condensate Condensate Heat Specific Specific production flow flow temp. cons. steam heat (unit/d) t/h t/h C MW kg/unit MJ/unit Air preheating DNCG Recovery boiler tds/d (1.8) (13) (27) Air preheating Power boiler tds/d (1.7) (72) (150) CNCG ejectors ADt/d (0) (0) MeOH plant t-evap/h Digester chip bin ADt/d Digester circulation heater LP, flash t. chip bin ADt/d Bleaching and hot water ADt/d Evaporation, 7 effects, integr. Stripper t-evap/h Ash treatment, crystallizer (no vendor decided) 131 t-ash/d ClO2 plant reboiler (vendor not decided) 38 t ClO2/d Chemical Plant (absorption chiller) (vendor not decided) 38 t ClO2/d Causticising, water heating tds/d Drying machine, dryer, after cond. cooler ADt/d Drying machine steam box+process heating ADt/d White water pit heating + ceiling flushing ADt/d Miscellaneous, losses, unaccounted ADt/d Dump condenser ADt/d Blow off steam ADt/d Drainage of excess condensate To feed water tank 1 (78.5) (78.5) 0.0 Totally consumed in LP system Total steam flow in LP system 608.1

16 Celulosa Arauco y Constitución S.A. Planta Arauco, Line 3 Average production level Feed water tank Steam Condensate Heat flow flow temp. cons. t/h t/h C MW Return condensate (644.6) 125 (92.1) Pressurising steam Steam from small turbines Make-up water Heat losses 0.2 Cooling of condensate 0.0 Deaeration venting vapour Sum Summary of steam consumers Steam Condensate Heat flow flow temp. cons. Process steam heat: t/h t/h C MW Miscellaneous from the boilers HP system MP2 system MP system LP system Feed water tanks Condensate cooling and losses Total process consumption For power generation Total steam heat consumption Steam generation Department Steam Feed water Heat Specific Specific production flow flow temp. generation steam heat Recovery boiler 3 (unit/d) t/h t/h C MW kg/unit MJ/unit HP steam Soot blowing steam, internally generated Cont. blow down Feed water preheating 1, MP Feed water preheating 2, MP LP steam for air preheating MP steam for air preheating MP2 steam for air preheating Totally 5742 tds/d Department Steam Feed water Heat Specific Specific production flow flow temp. generation steam heat Power boiler 5 (unit/d) t/h t/h C MW kg/unit MJ/unit HP steam Soot blowing steam, internally generated Cont. blow down MP2 steam for air preheating -6.2 MP steam for air preheating LP steam for air preheating Totally 991 tds/d Thereof from oil (0.0) 0 LP desuperheater water MP desuperheater water MP2 desuperheater water Recovery from cont. blow down to steam nets Heat from feed water pumps 6.4 Expansion steam from flash tanks Secondary heat for make-up water preheating 31.9 Totally generated

17 Celulosa Arauco y Constitución S.A. Planta Arauco, Line 3 Average production level Specific steam consumption HP etc MP2 MP LP Sum Heat kg/adt kg/adt kg/adt kg/adt kg/adt MJ/ADt Recovery boiler Feed water preheating Recovery boiler (1201) Feed water preheating Power boiler (216) Air preheating Recovery boiler (879) Air preheating Power boiler (35) Soot blowing Recovery boiler (incl. FGC) Power boiler soot blowing steam Recovery boiler 3 blow down water Power boiler 5 blow down water Black liquor direct heater, RB Spout atomizing steam HP pipe heat losses 0 6 ClO2 plant Digester department Oxygen delignification Bleaching and hot water Evaporation, 7 effects, integr. Stripper Ash treatment, crystallizer (no vendor decided) CNCG ejectors MeOH plant Causticising, water heating Drying machines Feed water tank Drainage of excess condensate 0 0 Dump condenser Blow-off steam Miscellaneous, losses, unaccounted Sum process steam Turbogenerator Turbogenerator Feed water turbine driven by HP-steam 0 Total for power generation Total consumption Specific steam generation Recovery boiler Power boiler Desuperheater water From feed water pumps 130 Recovery from cont. blow down to steam nets 34 Expansion steam from flash tanks 71 Secondary heat 650 Total generation

18 Celulosa Arauco y Constitución S.A. Planta Arauco, Line 3 Average production level Electrical power balance Electrical consumption: Department Specific Power Specific production power power (unit/d) department on dried kwh/unit MW kwh/adt Bus No. 7 Woodyard ADt/d Biomass boiler fuel handling tds/d Cooking ADt/d Brown stock and Bleach plant - 746/ ADt/d Drying machines and finishing line - 772/ ADt/d Water treatment, cooling towers & distribution ADt/d Effluent treatment (common primary) ADt/d Recovery boiler (incl. feed water pumps RB3/PB5) tds/d Causticizing & Lime kiln - 754/ tds/d Evaporation plant t-evap/h Ash treatment, crystallizer - 751/ t-ash/d Power boiler 5 (excl. feed water pumps) tds/d Turbine plant TG7/TG MW TG8 cooling towers and pumping t/h Feed water treatment t/h Chemical plant t ClO2/d Air Compressors ADt/d Oxygen plant to2/d Miscellaneous, losses t/d Total Bus No. 8 Common water intake and pumps (L2+L3) ADt/d Effluent treatment (common secondary) ADt/d Miscellaneous, losses ADt/d Total Total consumption for pulp mill (Line 3) Electrical generation: TG7, cogeneration TG whereof, cogeneration (16.8) (95.3) - whereof condensing (88.7) (502.2) TG7+TG8 total Power surplus Bus 7 (TG7) (Transformer 9) Power surplus Bus 8 (TG8) (Transformer 10) Power surplus Line 3 (total mill)

19 Magnus Ivarsbacke Forest Industry Energy Balance - Line 3 MCR production level

20 Arauco Line 3 Steam distribution and power generation MCR production level calc.case: C t/h C t/h Digester department 4943 ADt/d 40.0 t/h 40.0 t/h 27.0 bar(a) C Oxygen delignification 4841 ADt/d 0.0 t/h Soot blowing Bleach plant 4700 ADt/d bar(a) bar(a) 0.0 t/h 0.0 t/h t/h t/h Drying machine 4700 ADt/d Max=590 t/h Max=925 t/h Recovery 40.0 t/h Power 0.5 t/h bar(a) bar(a) Dry solids produced 6369 tds/d boiler 3 boiler C C Ditto tds/adt bleached Bl. liq MW Air preheating Bark/sludg MW Air preheat CNCG 4.2 MW 17.3 MW C MP2 Oil 0.0 MW 1.9 MW Evaporation plant: Inlet incl. spills MeOH 11.7 MW 9.8 MW C MP 0.0 t/h 0.0 t/h Conc. in / out 13.5% / 80.0% Oil / gas 0.0 MW 2.0 MW - LP (DNCG) Sum MW Evaporated water, t/h 1636 Sum MW C FGC Fuel 1094 tds/d Heat economy, MJ/t evap 396 TG8 TG C LHV 17.1 GJ/tDS Drying machines: Black liquor Moist. mix 51.8% Sludge (prim/sec) Cons. in / out 51.5% / 90.0% Effic: 91.1% 6369 tds/d 80.0% Effic: 87.5% 45 tds/d MW MW Evaporated water t/h C +130 t/d NCG & MeOH C 25%DS 0.0 t/h (Max= t/h (Max= MW)Specific consumpt. t/t-evap MW MP2 6.9 MW MP2 (Overload) 171 MW) Max=180 t/h 197 C 6.8 t/h 5.0 bar(a) C Consumption (Bus 7) 41.6 MW Flue gas (Eco 1) C t/h bar(a) 10.9 bar(a) 5.0 bar(a) 99.1 MW 165 C 4.8 MW MP Max=252 t/h t/h C C Power export (T9) 29.3 MW MP 2.3 t/h t/h C Max=479 t/h t/h x= MW 142 C x= C Max=265 t/h t/h t/h x= Max=509 t/h 0.0 MW 0.9 t/h Cont. blowdown 18.7 t/h 33.0 C Consumption (Bus t/h t/h 5.4 MW 11.0 t/h 25.0 C MW Power export (T10) Pre t/h Pre C Pre- FW+Air pre- Blow-off MW 95.5 C heat C heat. heat. heat 0.0 t/h Heat consumed: MW GJ/ADt 7.4 MW 28.0 MW 1.2 MW Drain 35.9 C MP2 Process heat Flue gas cooler Vent gas cond C t/h 27.0 bar(a) t/h Dump cond, blow-off surplus heat C Heat for power MP 9.5 bar(a) t/h Total heat consumed Blow down-tank 0.9 t/h 39.2 C C Heat generated: 1.1 t/h 87.1 t/h 86.2 t/h 0.0 t/h Power boiler LP 4.3 bar(a) t/h Recovery boiler C Secondary heat etc Total heat generated t/h 2.6 t/h Electrical balance: MW kwh/adt In boiler Pulp Mill (Bus 7 & 8) MW/ C 0.0 t/h building Total generated Feed water tank dt: 5.9 C In RB3-building Surplus (L3 only) Mixed 1238 t/h t/h C 0.0 t/h Surplus (L3+L2) t/h bed 37.2 C MW 7.5 t/h 6.3 t/h 5.8 MW C MP t/h C MP 73.6 t/h 0.0 t/h 37.2 C t/h Make-up t/h t/h 148 C LP 6.8 t/h water 4x215 t/h t/h Cooler RB3-PB5 air- & FW -preheater condensates 18.0 C C Demin 42.0 C C MP+LP t/h MW t/h plant t/h MW C Condensate from mill and dump condenser Cond. 9.7 t/h tank Magnus Ivarsbacke,

21 Celulosa Arauco y Constitución S.A. Planta Arauco, Line 3 MCR production level Productions Operating days d/a 354 Availability Yearly pulp production ADt/a Digester ADt/d 4943 Oxygen delignification ADt/d 4841 Bleach plant ADt/d 4700 Dried pulp ADt/d 4700 ClO2-plant t/d 42 Oxygen plant t/d 85 Treated ash in crystallizer t/d 146 Energy background data Water conditions: bar(a) C kj/kg Demineralized water temperature Secondary water stream from mixed bed filters, temp. after preheating, sec. heat Feed water temperature in tank Steam data: Recovery boiler 3 HP steam Recovery boiler 3 soot blowing steam (internal) Recovery boiler 3 blow down water Power boiler 5 HP steam Power boiler 5 soot blowing steam (internal) Power boiler 5 blow down water HP system MP2 system MP system LP system Recovery boiler fuel: Black liqour MeOH CNCG Total Specific virgin DS flow totally to recovery boilers tds/adt On digested pulp tds/adt On bleached pulp Virgin DS flow to recovery boilers tds/d Gross heat value of dry substance, HHV MJ/tDS Net heat value of dry substance, LHV MJ/tDS Fuel dryness Net heat value of wet fuel etc MJ/tDS Efficiency calculated on wet fuel Heat output, specifically MJ/ADt Total transferred to the steam system MW Bark conditions incl. wood losses: Euca wood Sludge Euca bark (L2+L3) External Total Average specific DS flow tds/adt DS flow to bark boilers tds/d Net heat value of dry substance, LHV MJ/tDS Dryness Net heat value of wet fuel MJ/tDS Efficiency calculated on wet fuel Transferred to the steam system, specifically MJ/tDS Transferred to the steam system MW Oil to boilers: Burned oil t/d 0.0 Transferred to the steam system MW 0.0 Net heat value, LHV MJ/t 40600

22 Celulosa Arauco y Constitución S.A. Planta Arauco, Line 3 MCR production level Steam and heat balance Department Steam Condensate Condensate Heat Specific Specific production flow flow temp. cons. steam heat (unit/d) t/h t/h C MW kg/unit MJ/unit Miscellaneous from the boilers Recovery boiler soot blowing steam (internal) 6499 tds/d Power boiler soot blowing steam (internal) 1094 tds/d Recovery boiler 3 blow down water 1092 t/h Power boiler 5 blow down water 229 t/h Total miscellaneous from the boilers HP system Department Steam Condensate Condensate Heat Specific Specific production flow flow temp. cons. steam heat (unit/d) t/h t/h C MW kg/unit MJ/unit Condensing turbine TG8 Condensing turbine TG8, gland leakage LP steam (157.9) 29.9 Condensing steam (309.2) Sum (467.4) Heat released in condenser Back pressure turbine TG7 Back pressure turbine TG7, gland leakage MP2 steam (140.3) 11.8 MP steam (185.3) 27.5 LP steam (509.0) 94.8 Sum (834.9) Small direct drive turbines Released in HP-steam turbine driven FW-pump (0.0) 0.0 PRV direct reducing to MP2 (0.0) PRV direct reducing to MP (0.0) PRV direct reducing to LP (0.0) Process heat consumption HP steam system heat losses 0.3 For power generation Totally consumed in HP system Total steam flow in HP system Department Steam Condensate Condensate Heat Specific Specific production flow flow temp. cons. steam heat MP2 system (unit/d) t/h t/h C MW kg/unit MJ/unit Air preheating Recovery boiler 6499 tds/d (17.3) Feed water preheating recovery boiler 6499 tds/d (36.0) Feed water preheating Power boiler tds/d (6.9) Soot blowing Power boiler tds/d Soot blowing Recovery boiler (incl. FGC) 6499 tds/d Totally consumed in MP2 system

23 Celulosa Arauco y Constitución S.A. Planta Arauco, Line 3 MCR production level MP system Department Steam Condensate Condensate Heat Specific Specific production flow flow temp. cons. steam heat (unit/d) t/h t/h C MW kg/unit MJ/unit Air preheating Recovery boiler tds/d (9.8) (62) (130) Feed water preheating Recovery boiler tds/d (29.3) (179) (390) Feed water preheating Power boiler tds/d (4.8) (184) (378) Digester top (direct steam) ADt/d Digester circulation heater MP, flash t. chip bin ADt/d Oxygen delignification ADt/d Evaporation plant, superconcentrator t-evap/h Black liquor direct heater, RB tds/d Spout atomizing steam tds/d Miscellaneous, losses, unaccounted ADt/d Chemical Plant (ejectors) (vendor not decided) 42 tclo2/d Direct reducing to LP (0.0) Totally consumed in MP system For power generation (0.0) Process Total steam flow in MP system LP system Department Steam Condensate Condensate Heat Specific Specific production flow flow temp. cons. steam heat (unit/d) t/h t/h C MW kg/unit MJ/unit Air preheating DNCG Recovery boiler tds/d (2.0) (13) (27) Air preheating Power boiler tds/d (1.9) (72) (150) CNCG ejectors ADt/d (0) (0) MeOH plant t-evap/h Digester chip bin ADt/d Digester circulation heater LP, flash t. chip bin ADt/d Bleaching and hot water ADt/d Evaporation, 7 effects, integr. Stripper t-evap/h Ash treatment, crystallizer (no vendor decided) 146 t-ash/d ClO2 plant reboiler (vendor not decided) 42 t ClO2/d Chemical Plant (absorption chiller) (vendor not decided) 42 t ClO2/d Causticising, water heating tds/d Drying machine, dryer, after cond. cooler ADt/d Drying machine steam box+process heating ADt/d White water pit heating + ceiling flushing ADt/d Miscellaneous, losses, unaccounted ADt/d Dump condenser ADt/d Blow off steam ADt/d Drainage of excess condensate To feed water tank 1 (86.2) (86.2) 0.0 Totally consumed in LP system Total steam flow in LP system 674.4

24 Celulosa Arauco y Constitución S.A. Planta Arauco, Line 3 MCR production level Feed water tank Steam Condensate Heat flow flow temp. cons. t/h t/h C MW Return condensate (716.0) 125 (102.3) Pressurising steam Steam from small turbines Make-up water Heat losses 0.2 Cooling of condensate 0.0 Deaeration venting vapour Sum Summary of steam consumers Steam Condensate Heat flow flow temp. cons. Process steam heat: t/h t/h C MW Miscellaneous from the boilers HP system MP2 system MP system LP system Feed water tanks Condensate cooling and losses Total process consumption For power generation Total steam heat consumption Steam generation Department Steam Feed water Heat Specific Specific production flow flow temp. generation steam heat Recovery boiler 3 (unit/d) t/h t/h C MW kg/unit MJ/unit HP steam Soot blowing steam, internally generated Cont. blow down Feed water preheating 1, MP Feed water preheating 2, MP LP steam for air preheating MP steam for air preheating MP2 steam for air preheating Totally 6369 tds/d Department Steam Feed water Heat Specific Specific production flow flow temp. generation steam heat Power boiler 5 (unit/d) t/h t/h C MW kg/unit MJ/unit HP steam Soot blowing steam, internally generated Cont. blow down MP2 steam for air preheating -6.9 MP steam for air preheating LP steam for air preheating Totally 1094 tds/d Thereof from oil (0.0) 0 LP desuperheater water MP desuperheater water MP2 desuperheater water Recovery from cont. blow down to steam nets Heat from feed water pumps 7.1 Expansion steam from flash tanks Secondary heat for make-up water preheating 35.4 Totally generated

25 Celulosa Arauco y Constitución S.A. Planta Arauco, Line 3 MCR production level Specific steam consumption HP etc MP2 MP LP Sum Heat kg/adt kg/adt kg/adt kg/adt kg/adt MJ/ADt Recovery boiler Feed water preheating Recovery boiler (1201) Feed water preheating Power boiler (215) Air preheating Recovery boiler (879) Air preheating Power boiler (35) Soot blowing Recovery boiler (incl. FGC) Power boiler soot blowing steam Recovery boiler 3 blow down water Power boiler 5 blow down water Black liquor direct heater, RB Spout atomizing steam HP pipe heat losses 0 6 ClO2 plant Digester department Oxygen delignification Bleaching and hot water Evaporation, 7 effects, integr. Stripper Ash treatment, crystallizer (no vendor decided) CNCG ejectors MeOH plant Causticising, water heating Drying machines Feed water tank Drainage of excess condensate 0 0 Dump condenser Blow-off steam Miscellaneous, losses, unaccounted Sum process steam Turbogenerator Turbogenerator Feed water turbine driven by HP-steam 0 Total for power generation Total consumption Specific steam generation Recovery boiler Power boiler Desuperheater water From feed water pumps 130 Recovery from cont. blow down to steam nets 34 Expansion steam from flash tanks 71 Secondary heat 650 Total generation

26 Celulosa Arauco y Constitución S.A. Planta Arauco, Line 3 MCR production level Electrical power balance Electrical consumption: Department Specific Power Specific production power power (unit/d) department on dried kwh/unit MW kwh/adt Bus No. 7 Woodyard ADt/d Biomass boiler fuel handling tds/d Cooking ADt/d Brown stock and Bleach plant - 746/ ADt/d Drying machines and finishing line - 772/ ADt/d Water treatment, cooling towers & distribution ADt/d Effluent treatment (common primary) ADt/d Recovery boiler (incl. feed water pumps RB3/PB5) tds/d Causticizing & Lime kiln - 754/ tds/d Evaporation plant t-evap/h Ash treatment, crystallizer - 751/ t-ash/d Power boiler 5 (excl. feed water pumps) tds/d Turbine plant TG7/TG MW TG8 cooling towers and pumping t/h Feed water treatment t/h Chemical plant t ClO2/d Air Compressors ADt/d Oxygen plant to2/d Miscellaneous, losses t/d Total Bus No. 8 Common water intake and pumps (L2+L3) ADt/d Effluent treatment (common secondary) ADt/d Miscellaneous, losses ADt/d Total Total consumption for pulp mill (Line 3) Electrical generation: TG7, cogeneration TG whereof, cogeneration (29.4) (150.1) - whereof condensing (100.3) (512.1) TG7+TG8 total Power surplus Bus 7 (TG7) (Transformer 9) Power surplus Bus 8 (TG8) (Transformer 10) Power surplus Line 3 (total mill)