CN104928963A - Zero-discharge online high concentration extraction process for chemimechamical pulp pulping waste liquid - Google Patents
Zero-discharge online high concentration extraction process for chemimechamical pulp pulping waste liquid Download PDFInfo
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- CN104928963A CN104928963A CN201510233624.2A CN201510233624A CN104928963A CN 104928963 A CN104928963 A CN 104928963A CN 201510233624 A CN201510233624 A CN 201510233624A CN 104928963 A CN104928963 A CN 104928963A
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- 239000002699 waste material Substances 0.000 title claims abstract description 187
- 238000004537 pulping Methods 0.000 title claims abstract description 178
- 238000000605 extraction Methods 0.000 title claims abstract description 89
- 239000007788 liquid Substances 0.000 title claims abstract description 64
- 238000005406 washing Methods 0.000 claims abstract description 368
- 238000000034 method Methods 0.000 claims abstract description 164
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 78
- 230000008569 process Effects 0.000 claims abstract description 67
- 239000003513 alkali Substances 0.000 claims abstract description 31
- 238000004519 manufacturing process Methods 0.000 claims abstract description 28
- 239000000463 material Substances 0.000 claims abstract description 20
- 238000000926 separation method Methods 0.000 claims abstract description 15
- 239000003344 environmental pollutant Substances 0.000 claims abstract description 11
- 231100000719 pollutant Toxicity 0.000 claims abstract description 11
- 239000003337 fertilizer Substances 0.000 claims abstract description 9
- 229920005610 lignin Polymers 0.000 claims abstract description 8
- 238000005096 rolling process Methods 0.000 claims description 64
- 238000001704 evaporation Methods 0.000 claims description 57
- 230000008020 evaporation Effects 0.000 claims description 57
- 238000007598 dipping method Methods 0.000 claims description 47
- 238000006243 chemical reaction Methods 0.000 claims description 44
- 239000002994 raw material Substances 0.000 claims description 42
- 239000002002 slurry Substances 0.000 claims description 42
- 238000004061 bleaching Methods 0.000 claims description 41
- 238000005470 impregnation Methods 0.000 claims description 34
- 238000007670 refining Methods 0.000 claims description 33
- 238000010025 steaming Methods 0.000 claims description 29
- 239000000284 extract Substances 0.000 claims description 21
- 229920002472 Starch Polymers 0.000 claims description 18
- 235000019698 starch Nutrition 0.000 claims description 18
- 238000000354 decomposition reaction Methods 0.000 claims description 16
- 239000008107 starch Substances 0.000 claims description 15
- 238000010411 cooking Methods 0.000 claims description 14
- 238000004064 recycling Methods 0.000 claims description 10
- 238000005516 engineering process Methods 0.000 claims description 7
- 238000001125 extrusion Methods 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 6
- 230000008676 import Effects 0.000 claims description 5
- 229920002522 Wood fibre Polymers 0.000 claims description 4
- 239000002025 wood fiber Substances 0.000 claims description 4
- 238000006424 Flood reaction Methods 0.000 claims description 3
- 238000011084 recovery Methods 0.000 abstract description 10
- 239000007844 bleaching agent Substances 0.000 abstract description 4
- 239000002351 wastewater Substances 0.000 description 37
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 21
- 229920001131 Pulp (paper) Polymers 0.000 description 16
- 239000000126 substance Substances 0.000 description 13
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 12
- 239000002023 wood Substances 0.000 description 11
- 238000002156 mixing Methods 0.000 description 10
- 239000003814 drug Substances 0.000 description 8
- 238000009835 boiling Methods 0.000 description 6
- 239000012141 concentrate Substances 0.000 description 6
- 239000000706 filtrate Substances 0.000 description 6
- 238000009413 insulation Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- QPCDCPDFJACHGM-UHFFFAOYSA-N N,N-bis{2-[bis(carboxymethyl)amino]ethyl}glycine Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(=O)O)CCN(CC(O)=O)CC(O)=O QPCDCPDFJACHGM-UHFFFAOYSA-N 0.000 description 5
- 208000028659 discharge Diseases 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000000835 fiber Substances 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 239000011362 coarse particle Substances 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000010865 sewage Substances 0.000 description 4
- 239000013589 supplement Substances 0.000 description 4
- PQUCIEFHOVEZAU-UHFFFAOYSA-N Diammonium sulfite Chemical compound [NH4+].[NH4+].[O-]S([O-])=O PQUCIEFHOVEZAU-UHFFFAOYSA-N 0.000 description 3
- 238000010790 dilution Methods 0.000 description 3
- 239000012895 dilution Substances 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 238000011068 loading method Methods 0.000 description 3
- 150000002978 peroxides Chemical class 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 241001504664 Crossocheilus latius Species 0.000 description 2
- 235000014633 carbohydrates Nutrition 0.000 description 2
- 150000001720 carbohydrates Chemical class 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000007857 degradation product Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000004821 distillation Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 150000004676 glycans Chemical class 0.000 description 2
- 238000005374 membrane filtration Methods 0.000 description 2
- 150000007524 organic acids Chemical class 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- KSSNXJHPEFVKHY-UHFFFAOYSA-N phenol;hydrate Chemical compound O.OC1=CC=CC=C1 KSSNXJHPEFVKHY-UHFFFAOYSA-N 0.000 description 2
- 229920001282 polysaccharide Polymers 0.000 description 2
- 239000005017 polysaccharide Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000004076 pulp bleaching Methods 0.000 description 2
- 244000025254 Cannabis sativa Species 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 235000019082 Osmanthus Nutrition 0.000 description 1
- 241000333181 Osmanthus Species 0.000 description 1
- 241000168036 Populus alba Species 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003866 digestant Substances 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000010808 liquid waste Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000010327 methods by industry Methods 0.000 description 1
- 230000003020 moisturizing effect Effects 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000010815 organic waste Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000011020 pilot scale process Methods 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000004094 preconcentration Methods 0.000 description 1
- 238000011085 pressure filtration Methods 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000013055 pulp slurry Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 230000009885 systemic effect Effects 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C11/00—Regeneration of pulp liquors or effluent waste waters
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C11/00—Regeneration of pulp liquors or effluent waste waters
- D21C11/10—Concentrating spent liquor by evaporation
Abstract
The invention discloses a zero-discharge online high concentration extraction process for a chemimechamical pulp pulping waste liquid. Online high concentration extraction is carried out on the pulping waste liquid and the high concentration waste liquid is evaporated and concentrated. Evaporated condensate water is recycled to a pulping production process and resource utilization of an evaporated residual liquid is carried out so as to realize zero discharge of the pulping waste liquid. Online high concentration extraction of the pulping waste liquid comprises the process links: decomposition-separation of pollutants; counter flow washing; and front-section extraction; the evaporated condensate water is recycled to material washing and dosing to impregnate and bleach; resource utilization of the evaporated residual liquid comprises production of fertilizers and alkali lignin and alkali recovery. On the basis, a conventional chemimechamical pulp process is redesigned.
Description
Technical field
The present invention relates to pulping and paper-making field, be specifically related to a kind of online high consistency extraction technique of reducing rules pulping waste liquor of zero-emission.
Technical background
The zero-emission of reducing rules pulping waste liquor is a developing direction, and the online high consistency extraction of reducing rules pulping waste liquor is the effective way realizing zero-emission.
The article introduction of " development of China's reducing rules wastewater processing technology " is done according to " Jiangsu papermaking " first phase in March, 2013 total 98th forward delivery housing osmanthus, the eighties in last century, pulping and paper-making research institute of Canada proposed the concept of reducing rules wastewater zero discharge first, and Meadow Lake Pulp Ltd adopts alkali recovery technology to realize the zero-emission of reducing rules waste liquid in the world first afterwards.The said firm does raw material with white poplar and produces BCTMP reducing rules, produces 28.5 ten thousand tons per year, ton pulp waste water 10m
3, concentration 2%.Adopt three pressure steam vapo(u)rizers that liquid waste concentration is concentrated to 35% from 2%, then adopt triple effect serous coat enrichment device enrichment to cause 67%.Concentrated raffinate carries out alkali collection to combustion furnace burning, and evaporation condensed water is back to slurrying workshop section.2 tons, ton slurry actual consumption clear water, mainly consumes in the evaporation drying of paper pulp.Some reducing rules factories in North America, Europe since 2005, comprise the REAI JOUTSE NO MILL of Chetwynd BC and Northern Europe Finland, the STORA EN-SO FORS company of M-REAI KASKIN NO MILL company and Sweden adopts alkali recovery process, achieves the zero-emission of reducing rules waste water.
Solid content fuel value 12.86 ~ 13.84MJ/kg in reducing rules waste water after measured, general carbohydrate fuel value is 12.6MJ/kg, show that reducing rules waste water solid content fuel value and general carbohydrate fuel value are close, be applicable to carrying out alkali collection process by burning.
Patent of invention " zero discharge treatment method for chemical mechanical pulp (patent No. CN200810019354.5) " discloses a kind of zero discharge treatment method for chemical mechanical pulp, comprise the following steps: be first the reducing rules waste liquid employing UF membrane pre-concentration of 2% by concentration, the permeate of 80% is back to slurrying and alkali collection workshop section, the filter liquor concentration accounting for total wastewater flow rate 20% reaches 10%, sends into the further evaporation and concentration in multiple-effect evaporation station.Concentrated residue carries out traditional alkali collection, and distilled water is back to slurrying after further stripping.This invention can adopt alkali recovery process to realize reducing rules zero-emission to concentrated realization of pulping waste liquor to reducing rules by membrane filtration, but membrane filtration increases investment and operation expense, still there is the larger problem of reducing rules concentration of wastewater low water consumption simultaneously.
Patent of invention " zero-emission treatment method for wastewater of chemi (patent No. 200910231012.4) " discloses the wastewater zero emission treatment method that one prepares Alkaline Peroxide Mechanical Pulp (APMP).Its concrete steps comprised are: distillation and concentration technique and alkali recovery process.Through the stage evaporation of function of mechanical steam recompression formula evaporator two-stage, concentration is concentrated into the waste water from reducing rules systemic concentration being 1.5 ~ 2.0% and reaches 5 ~ 8%, and then the cooking waste liquor produced with chemical slurry processes after reaching 12-15% mixes and delivers to alkali collection workshop section and be concentrated to 50% after-combustion, condensed water is used for pulp washing.This invention can by distillation concentrate to reducing rules waste liquid the zero-emission realizing reducing rules waste liquid, but because of concentration of wastewater low, 1.5 ~ 2%, still there is waste water generation in reducing rules pulping process still larger.
A kind of reducing rules alkali collection evaporation pretreatment process method of patent of invention " reducing rules evaporation pretreatment process method (patent No. CN201110147486.8) " this disclosure of the invention, comprise devil liquor recovery operation and alkali collection operation, devil liquor recovery operation by the filtered water collection in reducing rules production process to waste liquid intermediate pool, waste liquid in the waste liquid intermediate pool of collection is carried out alkali collection process by alkali collection operation, following evaporation pre-treatment step is also comprised: (a) waste liquid pressure filtration before described alkali collection process, waste liquid in waste liquid intermediate pool is filtered by pressurized screen, filter the bits produced and enter screening reject pond, waste liquid after filtration enters waste liquid tower and enters step (b), b the waste liquid after () filtration carries out evaporation classification process by evaporimeter, the dirty concentrate of weight wherein enters concentrated liquid pool and enters alkali collection process, light dirt enters chip washing tank and is used for cleaning wood chip, and the plain boiled water that evaporation produces enters the circulation of hot back flow water pump after entering plain boiled water tower and the mixing of mill dilution water and enters reducing rules pulping system.The present invention has that alkali recovery efficiency is high, the advantage of environmental protection more.Same problem does not reduce the generation of pulp-making waste-water.
In sum, reducing rules alkali collection can use for reference the experience of chemical pulp alkali collection, but must solve reducing rules concentration low (2%), the water yield is relatively large thus causes the problem that alkali collection operating cost is high.
Patent of invention " circulation utilization method (201010126189.0) in stalk pulping and papermaking processes ", i.e. " spring woods pattern ", be that chemical pulp produced by raw material with non-wood fiber, pulp-making waste-water adopts multiple-effect evaporation to concentrate, concentrated raffinate, for the production of fertilizer or alkali lignin, opens the road of pulping waste liquor recycling.Being specially: this invention relates to the circulation utilization method in stalk pulping and papermaking processes, namely obtaining the non-wood fibrous raw material for slurrying and waste material by getting the raw materials ready; Non-wood fibrous raw material adopts ammonium sulfite boiling slightly to be starched; Thick slurry shove obtains slurry and concentrated black liquid; After slurry washing, post processing obtains paper pulp for the preparation of paper products and thin phenol water; Concentrated black liquid and thin phenol water mixing evaporation and concentration, the liquid evaporated obtains foul condensate through reclaiming, and residual concentrate is as fertilizer material or the concentrated black liquid for the preparation of fertilizer; One or more of the waste material of foul condensate and gained of getting the raw materials ready, crop by-product or organic waste mix, and utilize the nitrogenous source of foul condensate or ammonium sulfite fermentation to obtain matrix or fertilizer; Or foul condensate is used for flue gas desulfurization, ammonia wherein and smoke reaction obtain digestant ammonium sulfite, recycle-water after middle section water process is used for the corresponding site of whole pulping process, thus reaches the comprehensive utilization of grass type stalk, for recycling economy provides new bright spot.But this patent of invention does not relate to the waste water handling problem that non-wood fiber bleaches (comprising cotton stalk) reducing rules.
A kind of method improving utilization ratio of chemi-mechanical pulp bleaching filtrate of patent of invention " a kind of method (application number CN201010254246.3) improving utilization ratio of chemi-mechanical pulp bleaching filtrate " this disclosure of the invention, by bleachery concentration be out the bleaching filtrate direct reuse that extracts to slurry concentration 20 ~ 45%wt of the pulp concentration of 10 ~ 30%wt to bleachery, enter in Bleaching reactor again after mixing with bleaching chemicals, slurry in slurry mixer before drift and bleach.After bleaching, arrange bleaching filtrate extraction element, reuse bleaching filtrate substitutes clear water or plain boiled water, realizes saving bleaching chemical, reduces the object of factory's clear water use amount.Ton slurry water consumption 0.64 ~ 2 ton can be reduced, save chemical chemical consumption, improve bleaching effect, improve slurry wash degree; Compared with former flow process, identical bleached chemical consumption, slurry bleaching whiteness can improve 2 ~ 6.5 percentage points.Ton slurry water consumption 0.64 ~ 2 ton can be reduced, save chemical chemical consumption, improve bleaching effect, improve slurry wash degree; Compared with former flow process, identical bleached chemical consumption, slurry bleaching whiteness can improve 2 ~ 6.5 percentage points.Problem is that the pollutant in the bleaching filtrate of Infinite Cyclic use could not extract in time from system, does not still reduce the pollutional load of follow-up pulping waste liquor, does not reduce the waste liquid generation of follow-up pulp washing.
The Nanjing Forestry University Xu auspicious Master degree candidate's academic dissertation of family " reducing rules waste water circulation enrichment technology ", when paper send alkali collection for reducing rules waste water, solid concentration is lower, 0.8 ~ 2%, consumed energy too much this problem when causing evaporation and concentration, have studied a kind of new PRC-APMP slurrying new technological process, by increasing the double-screw extrusion machine of four series connection after conventional P RC-APMP slurrying flow process bleaching tower, dense by height, the mode of adverse current extracts bleaching effluent, a waste water part send alkali collection process, another part circulating and recovering is at height dense blender dilution bleaching liquid, namely the total water consumption of system can be reduced, again can by reaching the effect of enrichment at system Inner eycle.In PRC-APMP flow process after improvement, wastewater solid content is increased to 6.7% by 4.36%, ton pulp waste water recovery rate is 95% time, and it is 1910.84kg that ton slurry extracts water consumption.But the opposed rear end that the extraction of the pulping waste liquor of this technique still exists flow process extracts.
Patent of invention " double helix exrusion method Alkaline Peroxide Mechanical Pulp (APMP) new pulping process (patent No. CN200410071936.X) ", the invention discloses a kind of double helix exrusion method Alkaline Peroxide Mechanical Pulp (APMP) new pulping process, pulping process flow step: (1) washing wood chip: wood chip washs in water temperature 40 DEG C ~ 60 DEG C water; (2) decatize: decatize 10-30min; (3) hot water or alkaline Pretreatment: temperature 70 C ~ 100 DEG C, time 20-40min, alkali charge 1.0%-3.0% (to OD wood chip weight); (4) enter 1# twin screw extruder to carry out crowded stone roller to fibre material and tear and process and add pulping bleaching liquid; (5) 1# reaction warehouse is entered; (6) fibre material enters 2# twin screw extruder and 2# reactor for treatment same (4); (5) send into Liang Duan defibrination workshop section through squeezing fibre material that is that process torn by stone roller and that fully suck pulp liquor, the laggard eliminating potential pool of defibrination carries out the latent process that disappears, and then screens purification, is concentrated into pulping.This invention emphasis does not relate to sewage handling problem.
In a word, existing reducing rules Zero discharge technology does not all fundamentally solve and reduces the problem that in reducing rules production process, pulping waste liquor generation is large.
The key solving reducing rules Zero discharge problem should be the minimizing of the waste liquid water yield and the raising of corresponding concentration that produce in pulping process.
According to reducing rules slurrying mechanism, the polluter of general timber reducing rules waste water is mainly derived from the organic compound of stripping from fibrous raw material in production process, chemicals remaining in process engineering and the fiber fines of loss.Its organic matter main chemical compositions is lignin degradation products polysaccharide and organic acid etc., and wherein lignin degradation products 30 ~ 40%, polysaccharide 10 ~ 15%, organic acid accounts for 35 ~ 40%.Reducing rules pulping process is paper pulp fiber raw material carried out to the operations such as extruding thread rolling defibrination with the acting in conjunction of heating and complete and discongest sub-wire pulping by the chemistry of machinery under the environmental condition added water, while organic matter carry out decomposition and extract and produce pulp-making waste-water.Traditional machine sizing process extracts the route of sewage after all taking first pulping to bleach, result causes the water yield large, and concentration is low.
Summary of the invention
For overcoming the deficiency of above existence, the present invention adopts with the following method:
A kind of online high consistency extraction technique of reducing rules pulping waste liquor of zero-emission.It is characterized in that:
The zero-emission of reducing rules cleaner production and pulping waste liquor is realized by online concentrated, the evaporation and concentration of pulping waste liquor to pulping waste liquor, the reuse of evaporation condensed water, the recycling of evaporation raffinate.
Further, the online high consistency extraction technique of the reducing rules pulping waste liquor of described a kind of zero-emission.The online of pulping waste liquor concentrates, in pulping bleaching process, namely carry out the decomposition of chip raw material pollutant---and separation, counter flow washing and front end are extracted.
The pulping bleaching technological process optimized is: chip washing (a1), and------(MSD) (c1) is torn in extruding, and------------(MSD) (g1) is torn in extruding---floods dosing (h1)---reaction warehouse (i1)---shove pulp washing (j1)---high consistency refining (k1)---dosing (l1)---reaction warehouse (m1)---shove pulp washing (n1)---high consistency refining (o1)---shove pulp washing (p1) to shove pulp washing (f1) to reaction warehouse (e1) to dipping dosing (d1) to chip steaming (b1).
Further, the online high consistency extraction technique of the reducing rules pulping waste liquor of described a kind of zero-emission.---separation is at chip steaming (b1), reaction warehouse (e1), and---shove pulp washing (n1) and shove pulp washing (p1) link complete for shove pulp washing (f1), reaction warehouse (i1)---shove pulp washing (j1), reaction warehouse (m1)---in the decomposition of pulping process Raw pollutant.
Further, the online high consistency extraction technique of the reducing rules pulping waste liquor of described a kind of zero-emission.Counter flow washing is by shove pulp washing (p1)---dosing (l1) and shove pulp washing (n1) link, and then wash and starch (n1)---dipping dosing (h1) and shove pulp washing (j1) link.Namely add clear water at shove pulp washing (p1) and complete pulp washing shove, the waste liquid produced is back to dosing (l1) and shove pulp washing (n1) link by counter flow washing, and then the waste liquid that shove pulp washing (n1) link produces is back to dipping dosing (h1) and shove pulp washing (j1) link by counter flow washing.
Further, the online high consistency extraction technique of the reducing rules pulping waste liquor of described a kind of zero-emission.The front end of pulping waste liquor is extracted and is referred to that pulping waste liquor extracts through shove pulp washing (f1) and shove pulp washing (j1) link from production process.
Further, the online high consistency extraction technique of the reducing rules pulping waste liquor of described a kind of zero-emission.The technological process optimized is: chip washing, (a2)---chip steaming, (b2)---extruding is torn, (MSD), (c2)---dipping dosing, (d2)---reaction warehouse, (e2)---extruding is torn, (MSD), (g2)---dipping dosing, (h2)---reaction warehouse, (i2)---shove pulp washing, (j2)---high consistency refining, (k2)---dosing, (l2)---reaction warehouse, (m2)---shove pulp washing, (n2)---high consistency refining, (o2)---shove pulp washing, (p2).
Further, the online high consistency extraction technique of the reducing rules pulping waste liquor of described a kind of zero-emission.---separation is at chip steaming (b2), reaction warehouse (e2) and reaction warehouse (i2)---shove pulp washing (j2), reaction warehouse (m2)---, and shove pulp washing (n2) and shove pulp washing (p2) link complete in the decomposition of pulping process Raw pollutant.
Further, the online high consistency extraction technique of the reducing rules pulping waste liquor of described a kind of zero-emission.Counter flow washing is by shove pulp washing (p2)---dosing (l2) and shove pulp washing (n2) link, and then wash and starch (n2)---dipping dosing (h2) and shove pulp washing (j2) link.Namely add clear water at shove pulp washing (p2) and complete pulp washing shove, the waste liquid produced is back to dosing (l2) and shove pulp washing (n2) link by counter flow washing, and then the waste liquid that shove pulp washing (n2) link produces is back to dipping dosing (h2) and shove pulp washing (j2) link by counter flow washing.
Further, the online high consistency extraction technique of the reducing rules pulping waste liquor of described a kind of zero-emission.The front end of pulping waste liquor is extracted and is referred to that pulping waste liquor extracts through shove pulp washing (j2) link from production process.
Further, the online high consistency extraction technique of the reducing rules pulping waste liquor of described a kind of zero-emission.Substitute Extruding & Tearing Machine (MSD) with thread rolling machine, and order completes extruding pulp washing thread rolling dosing operation on same thread rolling machine.
The pulping bleaching technological process optimized is: chip washing, (a3)---chip steaming, (b3)---extruding pulp washing thread rolling dosing, (c3)---impregnation storehouse, (d3)---shove pulp washing, (e3)---extruding pulp washing thread rolling dosing, (f3)---impregnation storehouse, (g3)---shove pulp washing, (h3)---high consistency refining, (i3)---dosing, (j3)---impregnation storehouse, (k3)---shove pulp washing, (l3)---high consistency refining, (m3)---shove pulp washing, (n3).
Further, the online high consistency extraction technique of the reducing rules pulping waste liquor of described a kind of zero-emission.The decomposition of pulping process Raw pollutant---separation is at chip steaming (b3)---extruding pulp washing thread rolling dosing (c3), impregnation storehouse (d3)---shove pulp washing (e3), extruding pulp washing thread rolling dosing (f3), shove pulp washing (l3), shove pulp washing (n3) link complete impregnation storehouse (g3)---shove pulp washing (h3), impregnation storehouse (k3)---.
Further, the online high consistency extraction technique of the reducing rules pulping waste liquor of described a kind of zero-emission.Counter flow washing is by shove pulp washing (n3)---dosing (j3) and shove pulp washing (l3) link, and then wash and starch (l3)---extruding washing thread rolling dosing (f3) and shove pulp washing (h3) link.Namely add clear water at shove pulp washing (n3) and complete pulp washing shove, the waste liquid produced is back to dosing (j3) and shove pulp washing (l3) link by counter flow washing, and then the waste liquid that shove pulp washing (l3) link produces is back to extruding washing thread rolling dosing (f3) and shove pulp washing (h3) link by counter flow washing.
Further, the online high consistency extraction technique of the reducing rules pulping waste liquor of described a kind of zero-emission.The front end of pulping waste liquor is extracted and is referred to that pulping waste liquor extracts through extruding washing thread rolling dosing (c3), shove pulp washing (e3), extruding washing thread rolling dosing (f3), shove pulp washing (h3) link from production process.
Further, the online high consistency extraction technique of the reducing rules pulping waste liquor of described a kind of zero-emission.The pulping bleaching technological process optimized is: chip washing, (a4)---chip steaming, (b4)---extruding pulp washing thread rolling dosing, (c4)---impregnation storehouse, (d4)---extruding pulp washing thread rolling dosing, (f4)---impregnation storehouse, (g4)---shove pulp washing, (h4)---high consistency refining, (i4)---dosing, (j4)---impregnation storehouse, (k4)---shove pulp washing, (l4)---high consistency refining, (m4)---shove pulp washing, (n4).
Further, the online high consistency extraction technique of the reducing rules pulping waste liquor of described a kind of zero-emission.---separation is at chip steaming (b4), and---extruding pulp washing thread rolling dosing (c4), impregnation storehouse (d4)---extrude pulp washing thread rolling dosing (f4), shove pulp washing (l4), shove pulp washing (n4) link complete impregnation storehouse (g4)---shove pulp washing (h4), impregnation storehouse (k4)---in the decomposition of pulping process Raw pollutant.
Further, the online high consistency extraction technique of the reducing rules pulping waste liquor of described a kind of zero-emission.Counter flow washing is by shove pulp washing (n4)---dosing (j4) and shove pulp washing (l4) link, and then wash and starch (l4)---extruding pulp washing thread rolling dosing (f4) and shove pulp washing (h4) link.Namely add clear water at shove pulp washing (n4) and complete pulp washing shove, the waste liquid produced is back to dosing (j4) and shove pulp washing (l4) link by counter flow washing, and then the waste liquid that shove pulp washing (l4) link produces is back to extruding pulp washing thread rolling dosing (f4) and shove pulp washing (h4) link by counter flow washing.
Further, the online high consistency extraction technique of the reducing rules pulping waste liquor of described a kind of zero-emission.The front end of pulping waste liquor is extracted and is referred to that pulping waste liquor extracts through extruding pulp washing thread rolling dosing (c4), extruding pulp washing thread rolling dosing (f4), shove pulp washing (h4) link from production process.
Further, the online high consistency extraction technique of the reducing rules pulping waste liquor of described a kind of zero-emission.The pulping bleaching technological process optimized is: chip washing, (a5)---chip steaming, (b5)---extruding is torn, (MSD), (c5)---dipping dosing, (d5)---reaction warehouse, (e5)---the dosing of extruding pulp washing dipping, (gh5)---reaction warehouse, (i5)---shove pulp washing, (j5)---high consistency refining, (k5)---dosing, (l5)---reaction warehouse, (m5)---shove pulp washing, (n5)---high consistency refining, (o5)---shove pulp washing, (p5).
Further, the online high consistency extraction technique of the reducing rules pulping waste liquor of described a kind of zero-emission.---separation is at chip steaming (b5) and reaction warehouse (e5), and---extruding pulp washing floods dosing (gh5), shove pulp washing (n5), shove pulp washing (p5) link complete reaction warehouse (i5)---shove pulp washing (j5), reaction warehouse (m5)---in the decomposition of pulping process Raw pollutant.
Further, the online high consistency extraction technique of the reducing rules pulping waste liquor of described a kind of zero-emission.Counter flow washing is by shove pulp washing (p5)---dosing (l5) and shove pulp washing (n5) link, and then wash and starch (n5)---extruding pulp washing dipping dosing (gh5) and shove pulp washing (j5) link.Namely add clear water at shove pulp washing (p5) and complete pulp washing shove, the waste liquid produced is back to dosing (l5) and shove pulp washing (n5) link by counter flow washing, and then the waste liquid that shove pulp washing (n5) link produces is back to extruding pulp washing dipping dosing (gh5) by counter flow washing) and shove pulp washing (j5) link.
Further, the online high consistency extraction technique of the reducing rules pulping waste liquor of described a kind of zero-emission.The front end of pulping waste liquor is extracted and is referred to that pulping waste liquor extracts through extruding pulp washing dipping dosing (gh5), shove pulp washing (j5) link from production process.
Further, the online high consistency extraction technique of the reducing rules pulping waste liquor of described a kind of zero-emission.The evaporation and concentration of pulping waste liquor, carries out multiple-effect evaporation to realize concentrating further after namely concentrating the extraction pulping waste liquor through front end after concentrating online.
Further, the online high consistency extraction technique of the reducing rules pulping waste liquor of described a kind of zero-emission.The reuse of evaporation condensed water, is about to evaporation foul condensate and the clear condensed moisture of evaporation is not back to the raw material washing of pulping process, material cooking, dipping dosing, shove pulp washing link.
Further, the online high consistency extraction technique of the reducing rules pulping waste liquor of described a kind of zero-emission.Evaporation condensed water is back to raw material washing (a1), material cooking (b1), squeezing extrusion pulp washing (MSD) (c1), thread rolling dosing (d1) link.
Further, the online high consistency extraction technique of the reducing rules pulping waste liquor of described a kind of zero-emission.Evaporation condensed water is back to raw material washing (a2), material cooking (b2), squeezing extrusion pulp washing (MSD) (c2), dipping dosing (d2), dipping dosing (h2) link.
Further, the online high consistency extraction technique of the reducing rules pulping waste liquor of described a kind of zero-emission.Evaporation condensed water is back to chip washing (a3), chip steaming (b3), extruding pulp washing thread rolling dosing (c3), shove pulp washing (e3), extruding pulp washing thread rolling dosing (f3), shove pulp washing (h3) link.
Further, the online high consistency extraction technique of the reducing rules pulping waste liquor of described a kind of zero-emission.Evaporation condensed water is back to chip washing (a4), chip steaming (b4), extruding pulp washing thread rolling dosing (c4), extruding pulp washing thread rolling dosing (f4), shove pulp washing (h4) link.
Further, the online high consistency extraction technique of the reducing rules pulping waste liquor of described a kind of zero-emission.Evaporation condensed water is back to chip washing (a5), chip steaming (b5), dipping dosing (d5), extruding pulp washing dipping dosing (gh5), shove pulp washing (j5) link.
Further, the online high consistency extraction technique of the reducing rules pulping waste liquor of described a kind of zero-emission.The recycling of pulping waste liquor, namely produces fertilizer or alkali lignin to the residue of pulping waste liquor after evaporation and concentration or does alkali collection.
Further, the online high consistency extraction technique of the reducing rules pulping waste liquor of described a kind of zero-emission.Dipping dosing bleaching completes in the reducing rules dipping bleaching action storehouse of routine, and process conditions are identical with traditional reducing rules impregnation technology with slurry is dense etc. for pharmacy variety quantity, dip time, and value is in the process parameters range of routine.
Further, the online high consistency extraction technique of the reducing rules pulping waste liquor of described a kind of zero-emission.Shove pulp washing is completed by press master, import slurry dense 8% ~ 25%, outlet slurry dense 30 ~ 55%.
Further, the online high consistency extraction technique of the reducing rules pulping waste liquor of described a kind of zero-emission.High consistency refining technique is identical with traditional reducing rules high consistency refining technique.
Further, the online high consistency extraction technique of the reducing rules pulping waste liquor of described a kind of zero-emission.The present invention is applicable to the cleaner production of other non-wood fiber raw material and the zero-emission of pulping waste liquor simultaneously.
Beneficial effect of the present invention is:
1, by the online concentrated online high consistency extraction realizing reducing rules pulping waste liquor, significantly reducing rules sewage quantity is reduced, the evaporation and concentration of pulping sewage of being more convenient for;
2, the whole circulating and recovering of evaporation condensed water is in raw material washing, material cooking, the bleaching of raw material dipping.
3, to evaporation raffinate recycling, thus the zero-emission of reducing rules pulping waste liquor is realized.
Accompanying drawing explanation
Fig. 1 pulping waste liquor is concentrated and high consistency extraction figure online.Comprise: the decomposition of pollutant---the front end high consistency extraction of separation, counter flow washing, pulping waste liquor
Fig. 2 reducing rules pulping waste liquor Zero discharging system figure.By the online concentrated and evaporation and concentration of pulping waste liquor, and the zero-emission of reducing rules cleaner production and pulping waste liquor is realized to the reuse of evaporation condensed water, the recycling of evaporation raffinate
Concrete embodiment
Embodiment 1
Raw material: air-dried wood chip, moisture content 10%, size 10 ~ 20mm × 20 ~ 30mm × 30 ~ 50mm, the place of production: Liaocheng Prefecture of Shandong Province
Implementation step:
1. according to technological process: chip washing, (a2)---chip steaming, (b2)---extruding is torn, (MSD), (c2)---dipping dosing, (d2)---reaction warehouse, (e2)---extruding is torn, (MSD), (g2)---dipping dosing, (h2)---reaction warehouse, (i2)---shove pulp washing, (j2)---high consistency refining, (k2)---dosing, (l2)---reaction warehouse, (m2)---shove pulp washing, (n2)---high consistency refining, (o2)---shove pulp washing, (p2).
2. chip washing (a2).Be carry out in Ф 1000 × 1000 drum-type rinsing machine in specification, material concentration 5%, supplements raw material slurry with COD at the mixing evaporation condensed water of the reuse of 1000mg/L.Condensed water derives from seven of Shandong Qualin Paper Industry Co., Ltd. be close to 10,000 tons/year of pilot production lines and imitates evaporate station.Moisture content 10% before raw material washing, moisture content 46.77% after washing, arranges outward without waste water in raw material washing process.
3. chip steaming (b2).Material cooking completes in 10,000 tons/year of continuous steamers, is to carry out under guarantee raw material fully absorbs the condition of liquid.Process conditions are: temperature is 95 DEG C, and the time is 30min, NaOH (100% purity) 1%, DTPA 0.3%.Keep the skin wet at 1100mg/L foul condensate with the COD of reuse.Before boiling, chip raw material moisture content is 46.77%, and it is 54.50% that boiling terminates raw aqueous rate, arranges outward in material cooking process without waste water.
4. (MSD) (c2) is torn in extruding.Learn from else's experience the wood chip 1kg (by over dry gauge) of boiling, and the Extruding & Tearing Machine MSD testing machine that Wen Rui Machinery Co., Ltd. produces completes.Compression ratio 4:1, obtains coarse particles.
5. flood dosing (d2): dosing: hydrogen peroxide (100% purity) 2%, NaOH (100% purity) 2% raw material weight percentage, Na
2siO
32%, DTPA0.3%, MgSO
40.01%, starch dense 30%, tear (MSD) (c2) and process the thick slurry hand obtained with through extruding and rub and mix thoroughly.
6. reaction warehouse (e2).Impregnation, temperature 95 DEG C, insulation 60min.By process through dipping dosing (d2) coarse particles loading plastic bag simulate in common steamer and carry out.
7. (MSD) (g2) is torn in extruding.The auspicious small-sized Extruding & Tearing Machine MSD testing machine in river in Shangdong Province completes.Compression ratio 4:1, obtains the thick slurry that secondary extrusion is torn.
8. flood dosing (h2).Medicament addition is: hydrogen peroxide (100% purity) 4%, dosing: NaOH (100% purity) 2% raw material weight percentage, Na
2siO
32%, DTPA0.3%, MgSO
40.02%, starch dense 25%.
9. reaction warehouse (i2).Impregnation, temperature 95 DEG C, insulation 60min.The coarse particles processed through dipping dosing (h2) loading plastic bag is simulated in common steamer and carries out.
10. shove pulp washing (j2).The shove pulp washing waste liquid produced with shove pulp washing (n2) makes shove pulp washing (j2) shove pulp washing water.Slurry dense 15% before shove, slurry dense 25% after machine slurry.The pulp washing shove waste water that shove pulp washing (j2) produces, collects and does evaporation process.Waste water COD after testing: 47031mg/L.
11. high consistency refinings (k2).At KRK300 type high-density paste mill defibrination, starch dense 25%.
12. dosing (l2.) hydrogen peroxide (100% purity) 2%, dosing: NaOH (100% purity) 1% raw material weight percentage, Na
2siO
31%, DTPA 0.1%, MgSO
40.02%, starch dense 25%.The waste liquid dilution medicament produced with shove pulp washing (n2).
13. reaction warehouses (m2).Dipping bleaching action, temperature 95 DEG C, insulation 60min.The coarse particles processed through dosing (l2) loading plastic bag is simulated in common steamer and carries out.
14. shove pulp washings (n2).The shove pulp washing waste liquid produced with shove pulp washing (p2) makes shove pulp washing (n2) shove pulp washing water.Slurry dense 15% before shove, slurry dense 25% after machine slurry.The pulp washing shove waste water that shove pulp washing (n2) produces is for flooding dosing (h2) and shove pulp washing (j2).
15. high dense mills (o2).At KRK300 type high-density paste mill defibrination, starch dense 25%
16. shove pulp washings (p2).With clear water as shove pulp washing (p2) pulp washing water, the waste liquid of generation is used for dosing (l2), shove pulp washing (n2).Slurry dense 15% before shove, slurry dense 25% after machine slurry.The pulp washing shove waste water that shove pulp washing (n2) produces is for flooding dosing (h2) and shove pulp washing (j2).
17. paper pulp slurry index tests:
Wood chip bleached chemi-mechanical pulp examining report
Application Example 2:
Raw material: air-dried wood chip, moisture content 10%, size 10 ~ 20mm × 20 ~ 30mm × 30 ~ 50mm, the place of production: Liaocheng Prefecture of Shandong Province
Pilot scale platform: Shandong Kai Longzhi industry Science and Technology Ltd. 10,000 tons/year bleaching reducing rules pilot production line
Implementation step:
1. according to technological process: chip washing (a4),---chip steaming (b4)------impregnation storehouse (d4)------impregnation storehouse (g4)------------impregnation storehouse (k4)---implement high consistency refining (i4) shove pulp washing (h4) in dosing (j4) in extruding pulp washing thread rolling dosing (f4) in extruding pulp washing thread rolling dosing (c4) by shove pulp washing (l4)---high consistency refining (m4)---shove pulp washing (n4).
2. raw material washing (a4).Be carry out in Ф 1000 × 1000 drum-type rinsing machine in specification, material concentration 5%, supplements raw material slurry with COD at the mixing evaporation condensed water of the reuse of 1000mg/L.Condensed water derives from seven of Shandong Qualin Paper Industry Co., Ltd. be close to 10,000 tons/year of pilot production lines and imitates evaporate station.Moisture content 10% before raw material washing, moisture content 46.77% after washing, arranges outward without waste water in raw material washing process.
3. material cooking (b4).Material cooking completes in 10,000 tons/year of continuous steamers, is to carry out under guarantee raw material fully absorbs the condition of liquid.Process conditions are: temperature is 95 DEG C, and the time is 30min, NaOH (100% purity) 1%, DTPA0.1%.Keep the skin wet at 1100mg/L foul condensate with the COD of reuse.Before boiling, chip raw material moisture content is 46.77%, and it is 54.50% that boiling terminates raw aqueous rate, arranges outward in material cooking process without waste water.
4. extrude pulp washing thread rolling dosing (c4).On Q185 type thread rolling machine, order realizes extruding pulp washing thread rolling dosing.Thread rolling machine extracts devaporation process after collection through the waste liquid of extruding generation as front end.Inject thread rolling machine after adding the foul condensate mixing of medicament and reuse to mix with slurry.Medicament addition is: hydrogen peroxide (100% purity) 2%, dosing: NaOH (100% purity) 2% raw material weight percentage, Na
2siO
32%, DTPA 0.3%, starches dense 25%.
5. impregnation storehouse (d4).Condition is: 95 DEG C of insulations in bleaching action storehouse, time 60min.
6. extrude pulp washing thread rolling dosing (f4).On second Q185 type thread rolling machine, order realizes extruding pulp washing thread rolling dosing.Extruded segment through thread rolling machine extrudes pulp-making waste-water in the process of raw material being carried out to squeezing extrusion, and the pulp-making waste-water extracted as front end collects devaporation process.Add medicament and by counter flow washing derive from shove pulp washing (h4) waste wash liquor mixing after inject thread rolling machine mix with slurry.Medicament addition is: hydrogen peroxide (100% purity) 4%, dosing: NaOH (100% purity) 3% raw material weight percentage, Na
2siO
33%, DTPA 0.2%, starches dense 25%.
7. impregnation storehouse (g4).Complete bleaching, condition is: 95 DEG C of insulations in bleaching action storehouse, time 60min.
8. shove pulp washing (h4).Complete in ZDL450 type press master.Import slurry dense 15%, outlet slurry dense 35%.Supplement shove pulp washing water and derive from the waste liquid produced by counter flow washing shove pulp washing (l4).Evaporation and concentration process is carried out after the waste water that shove pulp washing (h4) produces simultaneously extracts collection as front end.
9. high consistency refining (i4).Defibrination on TD950 type high-density paste mill, refining concentration 35%.
10. dosing (j4).Add the medicament of mixing in high-density paste mill outlet and keep the skin wet, the moisturizing of dipping derives from the waste liquid produced by counter flow washing shove pulp washing (n4), starches dense 30%, medicament: hydrogen peroxide 2% (pure), NaHO 1%, Na
2siO
31%, DTPA 0.05%, MgSO
40.01%.
11. impregnation storehouses (k4).Complete post-bleach, condition is: 95 DEG C of insulations in 3# bleaching action storehouse, time 60min.
12. shove pulp washings (l4).Complete in ZDL450 type press master.Import slurry dense 15%, outlet slurry dense 35%.Supplement shove water and derive from the waste liquid produced by counter flow washing shove pulp washing (n4).The waste water that shove pulp washing (l4) produces adds to shove pulp washing (h4) and dosing (j4) as counter flow washing water.
13. high consistency refinings (m4).Defibrination on TD950 type high-density paste mill, refining concentration 35%.
14. shove pulp washings (n4).At ZDL450 type import slurry dense 15%, outlet slurry dense 35%, pulp washing water derives from clear water, and shove waste liquid is used for the counter flow washing water of dosing (j4) and shove pulp washing (l4) as counter flow washing use water.
The mixing of 15. waste water.To extract from front end a little extrude pulp washing thread rolling dosing (c4), extruding pulp washing thread rolling dosing (f4), shove pulp washing (h4) extract pulping waste liquor mixing, the waste liquid after being concentrated online.After testing: the water yield is 5.26 tons, COD 33178mg/L, solid content 4.83%.
The evaporation and concentration of 16. pulping waste liquors.Namely after plate and frame filter press press filtration, send into the waste liquid after online concentrating the seven effect evaporate stations processing 1500 tons Shandong Quan Linzhi industry Group Co., Ltd day to concentrate, make waste water evaporate raffinate concentration and reach 50%, and obtain condensed water and foul condensate clearly.
The reuse of 17. evaporation condensed waters.Evaporation foul condensate COD:1100mg/L and clear condensed water COD:500mg/L, temperature is more than 60 DEG C, and fully recovering is in raw material washing (a4), material cooking (b4) and extruding pulp washing thread rolling dosing (c4) operation.
The recycling of 18. pulping waste liquors.By Shandong Qualin Paper Industry Co., Ltd., the residue after pulping waste liquor evaporation and concentration is used for the raw material of fertilizer or alkali lignin production.
19. paper pulp index tests:
Wood chip bleached chemi-mechanical pulp examining report
Marginal data:
Fig. 1 reducing rules pulping waste liquor comprises at concentrated and front end high consistency extraction:
The decomposition of slurrying pollutant---extract link, counter flow washing, the extraction of pulping waste liquor front end.
Fig. 2 reducing rules pulping waste liquor Zero discharging system: by the recycling of concentrated (decomposition of pollutant---separations, counter flow washing, leading portion extraction process), evaporation and concentration, evaporative condenser Water circulation (for raw material washing, the bleaching of dosing dipping), evaporation raffinate online (comprise by evaporate raffinate for the production of fertilizer, alkali lignin and subtract recovery) realize the zero-emission of reducing rules pulping waste liquor.
By reference to the accompanying drawings the specific embodiment of the present invention is described although above-mentioned; but not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technical scheme of the present invention, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection scope of the present invention.
Claims (35)
1. the online high consistency extraction technique of the reducing rules pulping waste liquor of a zero-emission, comprise pulping bleaching technique and pulping bleaching waste liquid online front end high consistency extraction technique, it is characterized in that: realize the zero-emission of reducing rules cleaner production and pulping waste liquor by the reuse of the evaporation and concentration of the online front end high consistency extraction to pulping waste liquor, pulping waste liquor, evaporation condensed water, the recycling of evaporation raffinate.
2. the online high consistency extraction technique of a kind of reducing rules pulping waste liquor of zero-emission as claimed in claim 1, it is characterized in that: the online front end high consistency extraction of described pulping waste liquor, in pulping bleaching process, namely carry out the decomposition of chip raw material pollutant---separation, counter flow washing and front end are extracted.
3. the online high consistency extraction technique of a kind of reducing rules pulping waste liquor of zero-emission as claimed in claim 1, it is characterized in that: described pulping bleaching operation is: chip washing (a1) that------(MSD) (c1) is torn in extruding, and------------(MSD) (g1) is torn in extruding---floods dosing (h1)---reaction warehouse (i 1)---shove pulp washing (j 1)---high consistency refining (k1)---dosing (l 1)---reaction warehouse (m1)---shove pulp washing (n1)---high consistency refining (o1)---shove pulp washing (p1) to shove pulp washing (f1) to reaction warehouse (e1) to dipping dosing (d1) to chip steaming (b1).
4. the online high consistency extraction technique of a kind of reducing rules pulping waste liquor of zero-emission as claimed in claim 2, is characterized in that: the decomposition of pulping process Raw pollutant that---separation is at chip steaming (b1), reaction warehouse (e1), and---shove pulp washing (n1) and shove pulp washing (p1) link complete for shove pulp washing (f1) and reaction warehouse (i 1)---shove pulp washing (j 1) and reaction warehouse (m1)---.
5. the online high consistency extraction technique of a kind of reducing rules pulping waste liquor of zero-emission as claimed in claim 2, it is characterized in that: counter flow washing is by shove pulp washing (p1)---dosing (l 1) and shove pulp washing (n1) link, and then wash and starch (n1)---dipping dosing (h1) and shove pulp washing (j 1) link.Namely add clear water at shove pulp washing (p1) and complete pulp washing shove, the waste liquid produced is back to dosing (l 1) and shove pulp washing (n1) link by counter flow washing, and then the waste liquid that shove pulp washing (n1) link produces is back to dipping dosing (h1) and shove pulp washing (j 1) link by counter flow washing.
6. the online high consistency extraction technique of a kind of reducing rules pulping waste liquor of zero-emission as claimed in claim 2, is characterized in that: the front end of pulping waste liquor is extracted and referred to that pulping waste liquor extracts through shove pulp washing (f1) and shove pulp washing (j 1) link from production process.
7. the online high consistency extraction technique of a kind of reducing rules pulping waste liquor of zero-emission as claimed in claim 2, is characterized in that: described pulping bleaching operation is: chip washing (a2)---chip steaming (b2)---(MSD) (c2) is torn in extruding---dipping dosing (d2)---reaction warehouse (e2)---(MSD) (g2) is torn in extruding---dipping dosing (h2)---reaction warehouse (i2)---shove pulp washing (j2)---high consistency refining (k2)---dosing (l2)---reaction warehouse (m2)---shove pulp washing (n2)---high consistency refining (o2)---shove pulp washing (p2).
8. the online high consistency extraction technique of a kind of reducing rules pulping waste liquor of zero-emission as claimed in claim 7, is characterized in that: the decomposition of pulping process Raw pollutant that---separation is at chip steaming (b2), reaction warehouse (e2) and reaction warehouse (i2)---shove pulp washing (j2), reaction warehouse (m2)---, and shove pulp washing (n2) and shove pulp washing (p2) link complete.
9. the online high consistency extraction technique of a kind of reducing rules pulping waste liquor of zero-emission as claimed in claim 6, it is characterized in that: counter flow washing is by shove pulp washing (p2)---dosing (l2) and shove pulp washing (n2) link, and then wash and starch (n2)---dipping dosing (h2) and shove pulp washing (j2) link.Namely add clear water at shove pulp washing (p2) and complete pulp washing shove, the waste liquid produced is back to dosing (l2) and shove pulp washing (n2) link by counter flow washing, and then the waste liquid that shove pulp washing (n2) link produces is back to dipping dosing (h2) and shove pulp washing (j2) link by counter flow washing.
10. the online high consistency extraction technique of a kind of reducing rules pulping waste liquor of zero-emission as claimed in claim 7, is characterized in that: the front end of pulping waste liquor is extracted and referred to that pulping waste liquor extracts through shove pulp washing (j2) link from production process.
The online high consistency extraction technique of reducing rules pulping waste liquor of 11. a kind of zero-emissions as claimed in claim 2, is characterized in that: substitute Extruding & Tearing Machine (MSD) with thread rolling machine, and order completes extruding pulp washing thread rolling dosing operation on same thread rolling machine.
The online high consistency extraction technique of reducing rules pulping waste liquor of 12. a kind of zero-emissions as claimed in claim 1, is characterized in that: described pulping bleaching operation is: chip washing (a3)---chip steaming (b3)---extruding pulp washing thread rolling dosing (c3)---impregnation storehouse (d3)---shove pulp washing (e3)---extruding pulp washing thread rolling dosing (f3)---impregnation storehouse (g3)---shove pulp washing (h3)---high consistency refining (i3)---dosing (j3)---impregnation storehouse (k3)---shove pulp washing (l3)---high consistency refining (m3)---shove pulp washing (n3).
The online high consistency extraction technique of reducing rules pulping waste liquor of 13. a kind of zero-emissions as claimed in claim 10, is characterized in that: the decomposition of pulping process Raw pollutant, and---separation is at chip steaming (b3), and------shove pulp washing (e3), extruding pulp washing thread rolling dosing (f3), shove pulp washing (l3), shove pulp washing (n3) link complete impregnation storehouse (g3)---shove pulp washing (h3), impregnation storehouse (k3)---for extruding pulp washing thread rolling dosing (c3), impregnation storehouse (d3).
The online high consistency extraction technique of reducing rules pulping waste liquor of 14. a kind of zero-emissions as claimed in claim 10.It is characterized in that: counter flow washing is by shove pulp washing (n3)---dosing (j3) and shove pulp washing (l3) link, and then wash and starch (l3)---extruding washing thread rolling dosing (f3) and shove pulp washing (h3) link.Namely add clear water at shove pulp washing (n3) and complete pulp washing shove, the waste liquid produced is back to dosing (j3) and shove pulp washing (l3) link by counter flow washing, and then the waste liquid that shove pulp washing (l3) link produces is back to extruding washing thread rolling dosing (f3) and shove pulp washing (h3) link by counter flow washing.
The online high consistency extraction technique of reducing rules pulping waste liquor of 15. a kind of zero-emissions as claimed in claim 11, is characterized in that: the front end of pulping waste liquor is extracted and referred to that pulping waste liquor extracts through extruding washing thread rolling dosing (c3), shove pulp washing (e3), extruding washing thread rolling dosing (f3), shove pulp washing (h3) link from production process.
The online high consistency extraction technique of reducing rules pulping waste liquor of 16. a kind of zero-emissions as claimed in claim 2, is characterized in that: described pulping bleaching operation is: chip washing (a4)---chip steaming (b4)---extruding pulp washing thread rolling dosing (c4)---impregnation storehouse (d4)---extruding pulp washing thread rolling dosing (f4)---impregnation storehouse (g4)---shove pulp washing (h4)---high consistency refining (i4)---dosing (j4)---impregnation storehouse (k4)---shove pulp washing (l4)---high consistency refining (m4)---shove pulp washing (n4).
The online high consistency extraction technique of reducing rules pulping waste liquor of 17. a kind of zero-emissions as claimed in claim 15, is characterized in that: the decomposition of pulping process Raw pollutant, and---separation is at chip steaming (b4), and------extruding pulp washing thread rolling dosing (f4), shove pulp washing (l4), shove pulp washing (n4) link complete impregnation storehouse (g4)---shove pulp washing (h4), impregnation storehouse (k4)---for extruding pulp washing thread rolling dosing (c4), impregnation storehouse (d4).
The online high consistency extraction technique of reducing rules pulping waste liquor of 18. a kind of zero-emissions as claimed in claim 15, it is characterized in that: counter flow washing is by shove pulp washing (n4)---dosing (j4) and shove pulp washing (l4) link, and then wash and starch (l4)---extruding pulp washing thread rolling dosing (f4) and shove pulp washing (h4) link.Namely add clear water at shove pulp washing (n4) and complete pulp washing shove, the waste liquid produced is back to dosing (j4) and shove pulp washing (l4) link by counter flow washing, and then the waste liquid that shove pulp washing (l4) link produces is back to extruding pulp washing thread rolling dosing (f4) and shove pulp washing (h4) link by counter flow washing.
The online high consistency extraction technique of reducing rules pulping waste liquor of 19. a kind of zero-emissions as claimed in claim 15, is characterized in that: the front end of pulping waste liquor is extracted and referred to that pulping waste liquor extracts through extruding pulp washing thread rolling dosing (c4), extruding pulp washing thread rolling dosing (f4), shove pulp washing (h4) link from production process.
The online high consistency extraction technique of reducing rules pulping waste liquor of 20. a kind of zero-emissions as claimed in claim 2, is characterized in that: described pulping bleaching operation is: chip washing (a5)---chip steaming (b5)---(MSD) (c5) is torn in extruding---dipping dosing (d5)---reaction warehouse (e5)---extruding pulp washing dipping dosing (gh5)---reaction warehouse (i5)---shove pulp washing (j5)---high consistency refining (k5)---dosing (l5)---reaction warehouse (m5)---shove pulp washing (n5)---high consistency refining (o5)---shove pulp washing (p5).
The online high consistency extraction technique of reducing rules pulping waste liquor of 21. a kind of zero-emissions as claimed in claim 19, is characterized in that: the decomposition of pulping process Raw pollutant, and---separation is at chip steaming (b5) and reaction warehouse (e5), and---extruding pulp washing dipping dosing (gh5), shove pulp washing (n5), shove pulp washing (p5) link complete reaction warehouse (i5)---shove pulp washing (j5), reaction warehouse (m5)---.
The online high consistency extraction technique of reducing rules pulping waste liquor of 22. a kind of zero-emissions as claimed in claim 19, it is characterized in that: counter flow washing is by shove pulp washing (p5)---dosing (l5) and shove pulp washing (n5) link, and then wash and starch (n5)---extruding pulp washing dipping dosing (gh5) and shove pulp washing (j5) link.Namely add clear water at shove pulp washing (p5) and complete pulp washing shove, the waste liquid produced is back to dosing (l5) and shove pulp washing (n5) link by counter flow washing, and then the waste liquid that shove pulp washing (n5) link produces is back to extruding pulp washing dipping dosing (gh5) by counter flow washing) and shove pulp washing (j5) link.
The online high consistency extraction technique of reducing rules pulping waste liquor of 23. a kind of zero-emissions as claimed in claim 19, is characterized in that: the front end of pulping waste liquor is extracted and referred to that pulping waste liquor extracts through extruding pulp washing dipping dosing (gh5), shove pulp washing (j5) link from production process.
The online high consistency extraction technique of reducing rules pulping waste liquor of 24. a kind of zero-emissions as claimed in claim 1, it is characterized in that: the evaporation and concentration of pulping waste liquor, carry out multiple-effect evaporation after namely the extraction pulping waste liquor through front end after concentrating online being concentrated to realize concentrating further.
The online high consistency extraction technique of reducing rules pulping waste liquor of 25. a kind of zero-emissions as claimed in claim 1, it is characterized in that: the reuse of evaporation condensed water, be about to evaporation foul condensate and the clear condensed moisture of evaporation is not back to the raw material washing of pulping process, material cooking, dipping dosing, shove pulp washing link.
The online high consistency extraction technique of reducing rules pulping waste liquor of 26. a kind of zero-emissions as claimed in claim 2, it is characterized in that: described technique also comprises evaporative condenser Water circulation link, evaporation condensed water is back to raw material washing (a1), material cooking (b1), squeezing extrusion pulp washing (MSD) (c1), thread rolling dosing (d1) link.
The online high consistency extraction technique of reducing rules pulping waste liquor of 27. a kind of zero-emissions as claimed in claim 7, it is characterized in that: described technique also comprises evaporative condenser Water circulation link, evaporation condensed water is back to raw material washing (a2), material cooking (b2), squeezing extrusion pulp washing (MSD) (c2), dipping dosing (d2), dipping dosing (h2) link.
The online high consistency extraction technique of reducing rules pulping waste liquor of 28. a kind of zero-emissions as claimed in claim 11, it is characterized in that: described technique also comprises evaporative condenser Water circulation link, evaporation condensed water is back to chip washing (a3), chip steaming (b3), extruding pulp washing thread rolling dosing (c3), shove pulp washing (e3), extruding pulp washing thread rolling dosing (f3), shove pulp washing (h3) link.
The online high consistency extraction technique of reducing rules pulping waste liquor of 29. a kind of zero-emissions as claimed in claim 16, it is characterized in that: described technique also comprises evaporative condenser Water circulation link, evaporation condensed water is back to chip washing (a4), chip steaming (b4), extruding pulp washing thread rolling dosing (c4), extruding pulp washing thread rolling dosing (f4), shove pulp washing (h4) link.
The online high consistency extraction technique of reducing rules pulping waste liquor of 30. a kind of zero-emissions as claimed in claim 20, it is characterized in that: described technique also comprises evaporative condenser Water circulation link, evaporation condensed water is back to chip washing (a5), chip steaming (b5), dipping dosing (d5), extruding pulp washing dipping dosing (gh5), shove pulp washing (j5) link.
The online high consistency extraction technique of reducing rules pulping waste liquor of 31. a kind of zero-emissions as claimed in claim 1, is characterized in that: the recycling of pulping waste liquor, namely the residue of pulping waste liquor after evaporation and concentration is produced to fertilizer or alkali lignin or is done alkali collection.
The online high consistency extraction technique of reducing rules pulping waste liquor of 32. a kind of zero-emissions as claimed in claim 1, it is characterized in that: dipping dosing bleaching completes in the reducing rules dipping bleaching action storehouse of routine, process conditions are identical with traditional reducing rules impregnation technology with slurry is dense etc. for pharmacy variety quantity, dip time, and value is in the process parameters range of routine.
The online high consistency extraction technique of reducing rules pulping waste liquor of 33. a kind of zero-emissions as claimed in claim 1, is characterized in that: shove pulp washing is completed by press master, import slurry dense 15% ~ 25%, outlet slurry dense 30 ~ 55%.
The online high consistency extraction technique of reducing rules pulping waste liquor of 34. a kind of zero-emissions as claimed in claim 1, is characterized in that: high consistency refining technique is identical with traditional reducing rules high consistency refining technique.
The online high consistency extraction technique of reducing rules pulping waste liquor of 35. a kind of zero-emissions as claimed in claim 1, is characterized in that: described technique is applicable to the cleaner production of non-wood fiber raw material and the zero-emission of pulping waste liquor.
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