CN102051834A - Cold blow process method for replacing heat in cooking process - Google Patents
Cold blow process method for replacing heat in cooking process Download PDFInfo
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- CN102051834A CN102051834A CN2009100446774A CN200910044677A CN102051834A CN 102051834 A CN102051834 A CN 102051834A CN 2009100446774 A CN2009100446774 A CN 2009100446774A CN 200910044677 A CN200910044677 A CN 200910044677A CN 102051834 A CN102051834 A CN 102051834A
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- black liquor
- hot
- pot
- digester
- cooking
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- 238000000034 method Methods 0.000 title claims abstract description 42
- 238000010411 cooking Methods 0.000 title claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 36
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- 229920001131 Pulp (paper) Polymers 0.000 claims abstract description 5
- 239000000706 filtrate Substances 0.000 claims abstract description 3
- 238000009835 boiling Methods 0.000 claims description 23
- 238000006073 displacement reaction Methods 0.000 claims description 16
- 230000029087 digestion Effects 0.000 claims description 13
- 102100030386 Granzyme A Human genes 0.000 claims description 3
- 101001009599 Homo sapiens Granzyme A Proteins 0.000 claims description 3
- 239000004568 cement Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 238000007701 flash-distillation Methods 0.000 claims description 2
- -1 chip filling Substances 0.000 claims 1
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 239000002023 wood Substances 0.000 abstract description 4
- 238000001704 evaporation Methods 0.000 abstract description 2
- 230000008020 evaporation Effects 0.000 abstract description 2
- 102000016550 Complement Factor H Human genes 0.000 abstract 1
- 108010053085 Complement Factor H Proteins 0.000 abstract 1
- 238000007664 blowing Methods 0.000 abstract 1
- 239000003513 alkali Substances 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 5
- 244000050510 Cunninghamia lanceolata Species 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 2
- 235000011613 Pinus brutia Nutrition 0.000 description 2
- 241000018646 Pinus brutia Species 0.000 description 2
- 229920005610 lignin Polymers 0.000 description 2
- 238000004537 pulping Methods 0.000 description 2
- 235000011121 sodium hydroxide Nutrition 0.000 description 2
- 235000014347 soups Nutrition 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000005987 sulfurization reaction Methods 0.000 description 1
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Abstract
The invention belongs to a cold blow process method for replacing heat in the cooking process. The conventional intermittent cooking is adopted; when the cooking process is finished after a preset factor H is reached, hot concentrated black liquid in a cooker is replaced by filtrate of a pulp washer, cooked paper pulp is cooled below a flash evaporation point and is blown to a blow cooker by compressed air; and replaced hot black liquid or warm black liquid is taken as cooking liquid used in the next cooking process. From the start of every cooking final stage to the end of the next cooking final stage, the method comprises the following basic steps of: replacing the hot black liquid; replacing the warm black liquid; performing cold blowing; heating white liquid; putting wood sheets into the cooker; injecting the warm black liquid; injecting the hot black liquid; adding hot white liquid; circulating inlet steam; and preserving heat. The method has the advantages of quick temperature rise in the cooking process, low steam consumption and energy saving.
Description
Technical field
The invention belongs to the cold process of spurting of a kind of digestion process heat displacement in the paper pulp fabrication process field, be applicable to wood pulp circulation heating displacement cooking and digesting apparatus thereof.
Background technology
The original production technology of pulping and digesting system is the boiling of sulfate process batch (-type), and the wood chip of digester is added cooking liquor, feeds steam then, and kettle temperature is heated to about 170 ℃ by original about 60 ℃.After boiling was finished, total head was spurted spraying pot, and a large amount of heat energy are discharged in the air.Utilize this boiling pattern, ton slurry steam consumption reaches 2 tons.
Summary of the invention
The objective of the invention is in order to save steam, the spy has developed the cold system of spurting of heat displacement cooking, this system utilizes original batch (-type) digesting apparatus well, adopt the heat energy method of replacement, the heat energy that effluxed has in the past been realized utilizing by displacement apparatus again, realize cold spurting and energy recovery, both improved pulp strength, reduced energy consumption again.
Principle of the present invention is to change traditional batch (-type) boiling theory, the heat energy of batch (-type) boiling is all reclaimed storage by the pressure reservoir of special setting, thereby recycle reaches purpose of energy saving.The cold technology of spurting of Hot swapping boiling mainly is provided with three basins, i.e. hot black liquor jar, warm black liquor jar, liquid heating tank, and the displacement pipe-line system that matches with it in vain.Set up the cold air compressor plant that spurts usefulness, and the DCS control system that adapts with it, whole process of production realizes computerized operation substantially.
Technical scheme of the present invention is to utilize existing batch (-type) boiling, when digestion process reaches the predetermined H factor and terminates, hot concentrated black liquid in the digester is replaced with the filtrate of wash engine, well-done paper pulp is cooled to flash distillation point following (below 100 ℃), with compressed air it is spurted to spraying pot then; Hot black liquor that cements out or warm black liquor are as the cooking liquor of next pot digestion process.Owing to go into a pot cooking liquor temperature height, after displacement, the boiling kettle temperature is reached more than 145 ℃, digestion process can be accomplished few aerating, does not even add steam and just can finish digestion process.So the digestion process quick heating, consumption vapour low (single pot of steam consumption be traditional boiling 1/3), thus reach energy-conservation purpose.
Advantage of the present invention is: spurt in the digestion process in that above-mentioned Hot swapping is cold, because by Hot swapping heating and heat exchange, therefore saved steam significantly, its saving amplitude can reach about 60%, they be that warm black liquor and hot black liquor flood wood chip owing to what use in the replacement process in addition, and the sulphidity of black liquor is high more a lot of than white liquid, this will help sulfuration dissolving of lignin in the wood chip, thereby, thereby saved the consumption of alkali for a large amount of stripping lignins of white liquid boiling have subsequently been created advantage.Alkali charge pine as the traditional boiling of pot of 75m3 is that 2150kg, China fir are 1450kg, and needing the alkali number pine in the mode by quick displacement cooking now is 1450kg, China fir 800kg.In the Hot swapping process, can produce the warm black liquor of a large amount of (100 ℃-140 ℃), a part can be used for the boiling that circulates, but also has unnecessary part temperature black liquor then to pass through flash tank, flash-off steam is used for the evaporator evaporation black liquor, thereby makes vapo(u)rization system save a certain amount of steam.
Description of drawings
Fig. 1 is a pulping digestion process heat replacing process flow chart.
Illustration:
1, hot black liquor jar; 2, liquid caustic soda (the white liquid of heat) jar; 3, warm black liquor jar; 4, flash vessel; 5, evaporimeter; 6, digester; 7, rare black liquor groove; 8, air compressor plant; 9, hot black liquor pump; 10, white liquid pump; 11, No. two white liquid pumps; 12, alkali pump; 13, warm black liquor pump; 14, rare black liquor pump.
The specific embodiment
As shown in Figure 1, heat displacement cooking heating process is to begin the latter stage from each boiling to finish latter stage to next boiling, and its basic step is:
(1) displacement hot black liquor.Rare black liquor of 70 ℃ of rare black liquor grooves is sent into digester 6 bottoms by pump 14,170 ℃ hot concentrated black liquid is cemented out, can cross a pot double-edged fine-toothed comb that is positioned at pot top and discharge, enter in the ad hoc hot black liquor hold-up tank 1, till reaching predetermined hot black liquor (more than 150 ℃) and being discharged from.
(2) replace warm black liquor.Continue with a high temperature black liquor in rare black liquor displacement pot of 70 ℃, the black liquor in 100 ℃ of-150 ℃ of scopes all displacement to ad hoc warm black liquid storage tank 3 and termination of pumping 14 stops replacing.
(3) cold spurting.When kettle temperature is reduced to below 100 ℃, the 7.5MPa compressed air of air compressor plant 8 outputs is injected in the digester 6 from the digester top by the pot double-edged fine-toothed comb, when pot inner pressure reaches 7MPa, promptly can open the digester bottom valve and put pot.Spurt in the process, for avoiding putting phenomenon not to the utmost, can suitably replenish black liquor from digester middle part pot double-edged fine-toothed comb, finish until putting pot, the whole pot process of putting does not have the steam discharge, and noise is little, and is pollution-free.
(4) heating white liquid.About 60 ℃ white liquid are sent into the white liquid hold-up tank (alkali liquid tank) 2 of heat by high-pressure pump 10 or 11, and hot black liquor or steam heat by the internal heater dialogue liquid in the white liquid hold-up tank of heat, and white liquid can be heated to about 160 ℃.
(5) chip filling.The dress pot adopts liquor charging limit, limit dress pot method, can guarantee dress pot amount so effectively, improves single pot of yield.
(6) inject warm black liquor.When dress pot process is finished, after building pot cover, warm black liquor pump 13 about 120 ℃ in the warm black liquid storage tank 3 is gone into digester 6 bottoms, the rare black liquor of dress pot low temperature is returned former rare black liquor storagetank 7 by rare black liquor that digester top filter plate cements out below 100 ℃.Temperature in the digester reaches about 100 ℃ substantially.
(7) inject hot black liquor.Hot black liquor (about 150 ℃) is pumped into digester 6 bottoms, the warm black liquor about 100 ℃ in the pot is cemented out by digester top filter plate, head into warm black liquor jar 3, kettle temperature is reached about 150 ℃.
(8) add the white liquid of heat.The white liquid of the heat of the white flow container 2 of heat (according to actual amount, the flowmeter metering being arranged) is pumped into digester 6 bottoms, displace the warm black liquor that is equivalent to the white liquid measure of heat and enter warm black liquor jar 3, at this moment the boiling kettle temperature reaches about 155 ℃ very soon.
(9) admission circulation.When kettle temperature reaches 150 ℃ of left and right sides, open steamer upper, middle and lower circulating line, circulated 30 minutes, can make kettle temperature reach balanced consistent like this, soup mixes, and directly feeds steam toward circulation pipe then, with soup mixing circulation hot digestion, (general 165 ℃-168 ℃ are decided with the digesting technoloy rules) stops into steam when reaching desired maximum temperature.If easily the raw material of boiling as bamboo or China fir woods etc., after the boiling kettle temperature adds the white liquid of heat, can reach 155 ℃, also can add steam, can pass through time expand, reach cooking effect.
(10) insulation.Constantly carry out the alkali lye circulation in the boiling overall process cold the spurting of heat displacement, be incubated after reaching the highest boiling temperature of defined in the digester,, just finished boiling this time until reaching the target that the H factor requires, and then carry out the heat displacement, repeat next digester cycle.
Claims (5)
1. a digestion process heat is replaced the cold process of spurting, it is characterized in that utilizing existing batch (-type) boiling, when digestion process reaches the predetermined H factor and terminates, hot concentrated black liquid in the digester is replaced with the filtrate of wash engine, well-done paper pulp is cooled to the flash distillation point, with compressed air it is spurted to spraying pot then; Hot black liquor that cements out or warm black liquor are as the cooking liquor of next pot digestion process.
2. method according to claim 1, it is characterized in that: begin latter stage to finish latter stage to next boiling from each boiling, its basic step is followed successively by: the displacement hot black liquor, replace warm black liquor, coldly spurt, heating white liquid, chip filling, injection temperature black liquor, inject hot black liquor, add the white liquid of heat, the admission circulation, be incubated.
3. method according to claim 2, it is characterized in that: the displacement hot black liquor is that rare black liquor of rare black liquor groove is sent into digester 6 bottoms by pump 14, hot concentrated black liquid is cemented out, can cross the pot double-edged fine-toothed comb that is positioned at the pot top discharges, enter in the ad hoc hot black liquor hold-up tank 1, till reaching predetermined hot black liquor and being discharged from.
4. method according to claim 2, it is characterized in that: cold spurting is when kettle temperature reduces, the 7.5MPa compressed air of air compressor plant 8 outputs is injected in the digester 6 from the digester top by the pot double-edged fine-toothed comb, when pot inner pressure reaches 7MPa, promptly can open the digester bottom valve and put pot.
5. method according to claim 2 is characterized in that: injecting hot black liquor is that hot black liquor is pumped into digester 6 bottoms, and the warm black liquor in the pot is cemented out by digester top filter plate, heads into warm black liquor jar 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100446774A CN102051834A (en) | 2009-11-02 | 2009-11-02 | Cold blow process method for replacing heat in cooking process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100446774A CN102051834A (en) | 2009-11-02 | 2009-11-02 | Cold blow process method for replacing heat in cooking process |
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| Publication Number | Publication Date |
|---|---|
| CN102051834A true CN102051834A (en) | 2011-05-11 |
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| CN2009100446774A Pending CN102051834A (en) | 2009-11-02 | 2009-11-02 | Cold blow process method for replacing heat in cooking process |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102226319A (en) * | 2011-06-03 | 2011-10-26 | 长沙理工大学 | A batch cooking cold spraying device and cold spraying method |
| CN102677516A (en) * | 2012-05-07 | 2012-09-19 | 安阳华森纸业有限责任公司 | Cold blow method for pulping in papermaking |
| CN103757961A (en) * | 2013-12-30 | 2014-04-30 | 汶瑞机械(山东)有限公司 | Batch cooking device and liquid distribution method thereof |
| CN104452389A (en) * | 2014-11-04 | 2015-03-25 | 中国轻工业南宁设计工程有限公司 | Energy-saving pulping cooking sequence interlock control system |
| CN111021132A (en) * | 2019-12-27 | 2020-04-17 | 鲍双铭 | Production process for making paper pulp by using corn straws as raw materials |
| CN116695479A (en) * | 2023-06-30 | 2023-09-05 | 重庆理文制浆有限公司 | DDS (direct digital synthesizer) cooking process of sulfate bamboo pulp |
-
2009
- 2009-11-02 CN CN2009100446774A patent/CN102051834A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102226319A (en) * | 2011-06-03 | 2011-10-26 | 长沙理工大学 | A batch cooking cold spraying device and cold spraying method |
| CN102677516A (en) * | 2012-05-07 | 2012-09-19 | 安阳华森纸业有限责任公司 | Cold blow method for pulping in papermaking |
| CN102677516B (en) * | 2012-05-07 | 2014-08-27 | 安阳华森纸业有限责任公司 | Cold blow method for pulping in papermaking |
| CN103757961A (en) * | 2013-12-30 | 2014-04-30 | 汶瑞机械(山东)有限公司 | Batch cooking device and liquid distribution method thereof |
| CN103757961B (en) * | 2013-12-30 | 2016-01-20 | 汶瑞机械(山东)有限公司 | A kind of batch cooking device and liquid distributing method thereof |
| CN104452389A (en) * | 2014-11-04 | 2015-03-25 | 中国轻工业南宁设计工程有限公司 | Energy-saving pulping cooking sequence interlock control system |
| CN104452389B (en) * | 2014-11-04 | 2017-02-15 | 中国轻工业南宁设计工程有限公司 | Energy-saving pulping cooking sequence interlock control system |
| CN111021132A (en) * | 2019-12-27 | 2020-04-17 | 鲍双铭 | Production process for making paper pulp by using corn straws as raw materials |
| CN116695479A (en) * | 2023-06-30 | 2023-09-05 | 重庆理文制浆有限公司 | DDS (direct digital synthesizer) cooking process of sulfate bamboo pulp |
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| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110511 |