CN102134139A - Comprehensive control process of black liquor - Google Patents
Comprehensive control process of black liquor Download PDFInfo
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- CN102134139A CN102134139A CN2010101011950A CN201010101195A CN102134139A CN 102134139 A CN102134139 A CN 102134139A CN 2010101011950 A CN2010101011950 A CN 2010101011950A CN 201010101195 A CN201010101195 A CN 201010101195A CN 102134139 A CN102134139 A CN 102134139A
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- black liquor
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- flue gas
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Abstract
The invention discloses a comprehensive control process applicable to chemical fiber pulp with velveteen as a raw material and black liquor of papermaking enterprises, and the main characteristic is that the process comprises the following procedures: black liquor collection, boiler flue gas desulphurization, ash water separation and precipitation, physicochemical treatment, anaerobic treatment, aerobic treatment, sludge treatment, etc. The process is a comprehensive control method that combines the physicochemical, the anaerobic, and the aerobic treatments; CO2 in boiler flue gas is fully used to realize waste control by waste, and biogas is generated for recycle; the whole control system has less investment, low operation cost, and obvious treatment effect; and waste water of black liquor can be treated to realize standard discharge.
Description
The present invention relates to a kind of waste water control technology, specifically is that to be applied to the velveteen be the purified pulp of raw material and the black liquor comprehensive management of technology of paper industry.
Produce black liquor when pulp and paper industry are produced, because of its complicated component, COD concentration height, difficult treatment is so be these two insoluble common problems of industry always.At present, the research of black liquor treatment mainly is divided into comprehensive utilization and two aspects of prevention and cure of pollution.What the comprehensive utilization aspect had typical meaning is the recovery of alkali recovery and lignin.The ordinary method that alkali reclaims is: black liquor reclaims alkali wherein after extraction, evaporation, burning, causticization, and this method can reclaim about 85% of residual alkali number in the black liquor; Lignin reclaims the method that adopts lignin acidizing separation usually, is dissolved in the sodium atom in the alkali lignin of alkali lye when promptly removing boiling, makes alkali lignin become insoluble precipitate once more.There are physico-chemical process, aerobic biochemical process, anaerobic biochemical etc. in the prevention and cure of pollution aspect.
Above improvement method is applicable to grass, wood is the manufacturing enterprise of raw material, and is during the cotton pulp of raw material is produced with the velveteen, and organic composition in its black liquor, content of lignin are relatively low, and it is high to adopt the aforesaid method cost to drop into, and recovering effect is not obvious.The present invention announces that a kind of being applicable to the velveteen is the purified pulp of raw material and the black liquor comprehensive management of technology of papermaking enterprise, and its principal character is that this technology comprises processes such as black liquor collection, boiler flue gas desulfurization, Ash Water Separator precipitation, materialization processing, anaerobic treatment, aerobic treatment, sludge treatment.This is a kind of materialization, anaerobism, the aerobic comprehensive processing method that combines, and makes full use of the CO in the boiler smoke
2Realize the treatment of wastes with processes of wastes against one another, can form methane again and utilize that whole governing system less investment, working cost are low, treatment effect is obvious, can make black liquor waste realize qualified discharge.
The objective of the invention is to realize by following technological process: black liquor at first enters the black liquor water collecting basin, stops after 3～10 hours, enters the boiler flue gas desulfurization system, utilizes the CO in the flue gas
2, SO
2Reduce black liquor pH value to 7～10, remove SO in the flue gas simultaneously
2, handle the back black liquor through desulfurization and enter the Ash Water Separator settling tank, solid deposits to be removed, liquid portion enters the materialization treatment system, in the materialization treatment system: by the air aeration oxidation and add SO in the oxygenant oxidation reduction black liquor
3 2-Concentration reduces suspended substance to 600mg/L by adding flocculation agent to 150mg/L, by adding acid, alkali adjustment PH to 6.5～7.5, adjust specific conductivity to 13ms/cm by adding dilution water.The water outlet of materialization treatment system enters equalizing tank and stopped 4～10 hours, enters pre-acidification pool again and stops 4～10 hours, and waste water enters system for anaerobic treatment after the pre-acidifying.System for anaerobic treatment is converted into biogas with biodegradable organic in the waste water, and transforming controlled temperature is 35～45 ℃.Biogas is used after methane voltage-stabilizing cabinet control collection, desulfurization.Sewage enters the aerobic treatment system after anaerobic treatment, by entering second pond behind the biochemical aeration reduction COD content, after the second pond precipitate and separate, be divided into mud and sewage two portions, sewage has reached emission request and has directly discharged, part mud is back to the aerobic treatment system, and excess sludge enters sludge treating system, transports after the mud of materialization treatment system generation is handled.
Accompanying drawing is a process flow sheet of the present invention, is illustrated below in conjunction with accompanying drawing.
During producing, cotton pulp produces 400 tons of black liquor, enter the black liquor water collecting basin, after stopping about 5 hours, enter the boiler flue gas desulfurization system, black liquor after flue gas desulfurization enters the Ash Water Separator settling tank, enter the materialization treatment system through post precipitation, in the materialization treatment system, utilize atmospheric oxidation and add oxygenant H
2O
2Reduce SO
3 2-Concentration is to 140mg/L, add flocculation agent and reduce suspended substance to 500mg/L, add acid, alkali adjustment PH to 6.8, add dilution water and adjust specific conductivity to 12ms/cm, the water outlet after the materialization treatment system enters equalizing tank and stopped 5 hours, enters pre-acidification pool again and stops 7 hours, enter system for anaerobic treatment then, system for anaerobic treatment is converted into biogas with biodegradable organic in the waste water when 37～38 ℃ of temperature, biogas through the control of methane voltage-stabilizing cabinet collect, deposit is stand-by after the desulfurization.Sewage after anaerobic treatment enters the aerobic treatment system, reduces COD by biochemical aeration, enters second pond then, post precipitation sewage is discharged, part mud is back to the aerobic treatment system, and the mud that excess sludge and materialization treatment system produce enters sludge treating system, transports after the processing.
Claims (5)
1. black liquor comprehensive management of technology, its principal character is to comprise technological processs such as black liquor collection, boiler flue gas desulfurization, Ash Water Separator precipitation, materialization processing, anaerobic treatment, aerobic treatment, sludge treatment.
2. black liquor as claimed in claim 1 is collected, and it is characterized in that black liquor was 3～10 hours black liquor water collecting basin residence time.
3. boiler flue gas desulfurization as claimed in claim 1 is characterized in that, utilizes the CO in the flue gas
2, SO
2Reduce black liquor pH value to 7～10, remove SO in the flue gas simultaneously
2
4. materialization as claimed in claim 1 is handled, and it is characterized in that at first utilizing air with SO in the waste water
3 2-Be oxidized into SO
4 2-, again by adding oxygenant oxidation SO
3 2-Be SO
4 2-, finally enter the SO of anaerobic treatment
3 2-Concentration utilizes atmospheric oxidation can effectively reduce the oxygenant consumption earlier less than 150mg/L.Add flocculation agent and reduce suspension content to 600mg/L.Add dilution water and reduce specific conductivity to 13ms/cm.Materialization is handled back sewage PH and is controlled at 6.5～7.5.
5. anaerobic treatment as claimed in claim 1 is characterized in that biodegradable organic matter is converted into biogas.Anaerobic technique requires 35～45 ℃ of controlled temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101011950A CN102134139A (en) | 2010-01-26 | 2010-01-26 | Comprehensive control process of black liquor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101011950A CN102134139A (en) | 2010-01-26 | 2010-01-26 | Comprehensive control process of black liquor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102134139A true CN102134139A (en) | 2011-07-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101011950A Pending CN102134139A (en) | 2010-01-26 | 2010-01-26 | Comprehensive control process of black liquor |
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| CN (1) | CN102134139A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102992553A (en) * | 2012-12-31 | 2013-03-27 | 黄河三角洲京博化工研究院有限公司 | Method for comprehensively treating and utilizing dissolving pulp black liquor |
| CN103466884A (en) * | 2013-09-12 | 2013-12-25 | 安徽省绿巨人环境技术有限公司 | Process for treating waste paper pulping and papermaking waste water |
| CN104478164A (en) * | 2014-12-10 | 2015-04-01 | 中国宣纸股份有限公司 | Treatment system for secondary black liquor |
| CN105523673A (en) * | 2016-02-03 | 2016-04-27 | 大唐环境产业集团股份有限公司 | Flue gas softening pretreatment device and method for desulfurization wastewater |
| CN105540936A (en) * | 2016-02-03 | 2016-05-04 | 大唐环境产业集团股份有限公司 | Device and method for pretreating desulfurization wastewater by flue gas softening |
| CN105600991A (en) * | 2016-02-03 | 2016-05-25 | 大唐环境产业集团股份有限公司 | Pretreatment device and method for softening desulphurization waste water |
| CN105731683A (en) * | 2016-02-03 | 2016-07-06 | 大唐环境产业集团股份有限公司 | Treatment device and method for softening desulfurization waste water |
| CN110436715A (en) * | 2019-09-05 | 2019-11-12 | 山东银鹰股份有限公司 | Cotton pulp wastewater treatment process |
| CN111389205A (en) * | 2019-01-03 | 2020-07-10 | 安徽雪龙纤维科技股份有限公司 | ClO (ClO)2Method for treating tail gas |
-
2010
- 2010-01-26 CN CN2010101011950A patent/CN102134139A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102992553A (en) * | 2012-12-31 | 2013-03-27 | 黄河三角洲京博化工研究院有限公司 | Method for comprehensively treating and utilizing dissolving pulp black liquor |
| CN103466884A (en) * | 2013-09-12 | 2013-12-25 | 安徽省绿巨人环境技术有限公司 | Process for treating waste paper pulping and papermaking waste water |
| CN104478164A (en) * | 2014-12-10 | 2015-04-01 | 中国宣纸股份有限公司 | Treatment system for secondary black liquor |
| CN104478164B (en) * | 2014-12-10 | 2017-01-18 | 中国宣纸股份有限公司 | Treatment system for secondary black liquor |
| CN105731683A (en) * | 2016-02-03 | 2016-07-06 | 大唐环境产业集团股份有限公司 | Treatment device and method for softening desulfurization waste water |
| CN105600991A (en) * | 2016-02-03 | 2016-05-25 | 大唐环境产业集团股份有限公司 | Pretreatment device and method for softening desulphurization waste water |
| CN105540936A (en) * | 2016-02-03 | 2016-05-04 | 大唐环境产业集团股份有限公司 | Device and method for pretreating desulfurization wastewater by flue gas softening |
| CN105523673A (en) * | 2016-02-03 | 2016-04-27 | 大唐环境产业集团股份有限公司 | Flue gas softening pretreatment device and method for desulfurization wastewater |
| CN105731683B (en) * | 2016-02-03 | 2018-08-31 | 大唐环境产业集团股份有限公司 | A kind of processing unit and method of desulfurization wastewater softening |
| CN105540936B (en) * | 2016-02-03 | 2018-08-31 | 大唐环境产业集团股份有限公司 | A kind of desulfurization wastewater flue gas softening pretreatment unit and preprocess method |
| CN105600991B (en) * | 2016-02-03 | 2018-08-31 | 大唐环境产业集团股份有限公司 | A kind of pretreatment unit and method of desulfurization wastewater softening |
| CN111389205A (en) * | 2019-01-03 | 2020-07-10 | 安徽雪龙纤维科技股份有限公司 | ClO (ClO)2Method for treating tail gas |
| CN110436715A (en) * | 2019-09-05 | 2019-11-12 | 山东银鹰股份有限公司 | Cotton pulp wastewater treatment process |
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Application publication date: 20110727 |