CN100419155C - Closed control method of paper-making waste water - Google Patents
Closed control method of paper-making waste water Download PDFInfo
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- CN100419155C CN100419155C CNB991096363A CN99109636A CN100419155C CN 100419155 C CN100419155 C CN 100419155C CN B991096363 A CNB991096363 A CN B991096363A CN 99109636 A CN99109636 A CN 99109636A CN 100419155 C CN100419155 C CN 100419155C
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- black liquor
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- boiled water
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Abstract
The present invention relates to a closed treating method of papermaking waste water, which comprises a treating method of black liquor, a treating method of middle section water and a treating method of white water, wherein the treating method of black liquor comprises that bacterial liquor is prepared, biochemical treatment is carried out to black liquor, lignin is separated under the condition of alkaline and then is filtered, and filter liquor is returned for steaming; the treating method of middle section water comprises that middle section water is treated with condensation air flotation, the floating slag of the middle section water is reused as a regenerative agent, and a water phase is recycled after being filtered and sterilized; the treating method of white water comprises that white water is recycled after being filtered and purified. The present invention has the advantages of thorough treatment, reduced maximum investment and low operation cost. Because alkali is reused, and the treating drug of middle section water is repeatedly recycled, the operation cost is greatly reduced.
Description
Technical field
The present invention relates to field of environment protection, particularly a kind of improvement method of closed paper waste.
Background technology
Paper waste comprises entering chemical agents such as containing a large amount of plant material derivatives such as lignin, carbohydrate and alkali in black liquor, middle section water and the plain boiled water environment and cause huge pollution.Except the influence to animal and plant, the resident around also making absorbs water difficulty, and consequence is very serious.At present, some producer adopts so-called Silvola recovery, is about to black liquor vaporizing and concentrates, is sintered into sodium carbonate, reclaims alkali through causticization again.This method investment is big, and energy consumption is many, is difficult to generally promote.And the physical-chemical process that adopts usually is that manufacturer is difficult to stand because of the operating cost height also.For domestic and international in this respect research work achievement, by Zhang Ke, the firm chief editor of turnover " the condensation utilization of paper industry cooking waste liquor and pollution prevention technique were once done comprehensively and were narrated.
Summary of the invention
The purpose of this invention is to provide a kind of alkali that in black liquor, reclaims and be reused for mashing off, in the compensation producing cost, reduce the control expense of black liquor, and the middle section water that will administer and plain boiled water are reused for the improvement method of the closed paper waste of pulp washing.
The improvement method of closed paper waste of the present invention comprises the processing method to black liquor, middle section water and plain boiled water, wherein, the processing method of described black liquor comprises the preparation of bacterium liquid and black liquor is made lignin segregation through biochemical treatment, under alkali condition, more after filtration, filtrate is returned, and is used for boiling; The processing method of described middle section water is that middle section water is carried out coagulating gas-floating, and its scum silica frost is re-used as regenerative agent, and water is sterilized after filtration by reuse; The processing method of described plain boiled water is that plain boiled water is purified the back reuse after filtration.
Wherein, the preparation of described bacterium liquid comprises that fresh black liquor is placed 1-12 under 4-45 ℃ of temperature obtained bacterial classification in individual month.
The biochemical treatment process of described black liquor is to add bacterial classification in the black liquor, under 5 to 45 ℃ the temperature, behind the biochemical treatment 2-6 hour, adds medicament reaction segregation lignin, product is filtered, and filter residue can be used for making brick after processed, contain alkali in the filtrate, can be used further to boiling.The adding proportion of described bacterial classification is the 0.1-1% of black liquor gross weight; Described medicament is lime, slaine and organic flocculating agent, and described slaine can be the sulfate or the chloride of iron, industry iron, copper, and described organic flocculating agent can be polyacrylamide system, as neutral polyacrylamide or hydrolyzed polyacrylamide; The parts by weight proportioning of wherein said each medicament is:
Slaine: 0.1-0.3 part; Lime: 0.5-6 part; Organic flocculating agent: 0.001-0.01 part
Described black liquor is after biochemical treatment, and COD reduces about half.Again through flashing reactor, with ferrous sulfate (0.1-0.3%), lime (0.5-6%), hydrolyzed polyacrylamide (0.001-0.01%) reaction, lignin separates with alkali lye.Through filter, lignin transports, and alkali lye is back to boiling.
The processing procedure of described middle section water be with middle section water after flashing reactor and medicament effect, inject flotation tank; Scum silica frost is used for regenerative agent after getting, filter through scraping; Water after filtration, reuse behind the oxidation sterilizing.Described medicament is a slaine; Described slaine can be the sulfate or the chloride of aluminium, iron, copper; The addition of described medicament can be 0.02-0.1%; Disinfectant can be ozone or bleaching powder, and the addition of described disinfectant can be 5-20ppm.
The processing procedure of described plain boiled water is with plain boiled water after filtering, and filter liquor gets final product direct reuse.If long-term reuse using ozone or bleaching powder sterilization, the addition of described ozone or bleaching powder can be 1-10ppm.
Advantage of the present invention is:
1, administers thoroughly.Black liquor reclaims alkali after treatment and can be used for boiling; Middle section water is used further to pulp washing after treatment; Plain boiled water purifies the back reuse, has really realized " closed system ".
2, reduced great investment.For the paper plant of ton, existing Silvola recovery invested ten million, and the input that has is tens million of still can not be moved, and after method of the present invention all administered black liquor, middle section water, plain boiled water, investment was less than 3,000,000 yuan.
3, operating cost is extremely low.Because the reuse repeatedly that alkali is recycled and middle section water is administered medicament greatly reduces operating cost.
Method of the present invention also is applicable to the red liquid of generation in the imines slurry and the waste liquid that the lime pulp-making method produces.
Further describe the present invention below in conjunction with embodiment.
The specific embodiment
Embodiment
There is wheat straw alkali pulp waste water in certain ton paper plant.200 tons of black liquor every days, COD about 100,000; Middle section water six kilotons, COD 1,005 to 2,000; Plain boiled water five kilotons, COD 305 to 500.
Adopt the improvement method of closed paper waste, comprise processing method, wherein black liquor, middle section water and plain boiled water, the processing method of described black liquor comprises the preparation of bacterium liquid and black liquor is made the lignin segregation through biochemical treatment, under alkali condition, again after filtration, filtrate is returned, and is used for boiling; The processing method of described middle section water is that middle section water is carried out coagulating gas-floating, and its scum silica frost is re-used as regenerative agent, and water is sterilized after filtration by reuse; The processing method of described plain boiled water is that plain boiled water is purified the back reuse after filtration.
Wherein, the preparation of described bacterium liquid comprises places fresh black liquor 10 months under 40 ℃ temperature, and smelling an offensive odor to obtain bacterial classification.
The biochemical treatment process of described black liquor is to add bacterial classification in the black liquor, under 40 ℃ the temperature, biochemical treatment is after 4 hours, adds medicament reaction segregation lignin, lignin is separated with alkali lye, product is filtered, lignin transports, filter residue can be used for making brick after processed; Contain alkali in the filtrate, can be used further to boiling.The adding proportion of described bacterial classification is 0.5% of a black liquor gross weight; Described medicament is a ferrous sulfate, lime and hydrolyzed polyacrylamide, and the parts by weight proportioning of wherein said each medicament is:
Ferrous sulfate: 0.2 part; Lime: 3 parts; Hydrolyzed polyacrylamide: 0.05 part
The processing procedure of described middle section water be with middle section water after flashing reactor and medicament effect, inject flotation tank; Collect scum silica frost with trap, scum silica frost and acid effect secondary aluminium salt after getting, filter through scraping; Water can be back to pulp washing behind the wall type filter.Described slaine is an aluminum sulfate, and addition is 0.08%.Long-term circulation time needs with ozone or bleaching powder sterilization, and addition is 10ppm.
Plain boiled water enters the wall type filtering ponds after concentric reducer separates staple fibre, filter liquor gets final product reuse.
Described black liquor is through biochemical action, and COD reduces about half.
Claims (7)
1. the improvement method of a closed paper waste, it is characterized in that comprising processing method to black liquor, middle section water and plain boiled water, wherein, the processing method of described black liquor comprises the preparation of bacterium liquid and black liquor is made the lignin segregation through biochemical treatment, under alkali condition, again after filtration, filtrate is returned, and is used for boiling; The processing method of described middle section water is that middle section water is carried out coagulating gas-floating, and its scum silica frost is used for regenerative agent, and water is sterilized after filtration by reuse; The processing method of described plain boiled water is that plain boiled water is purified the back reuse after filtration;
The preparation of described bacterium liquid comprises that fresh black liquor is placed 1-12 under 4-45 ℃ of temperature obtained bacterial classification in individual month;
The biochemical treatment process of described black liquor is will be in the black liquor to add above-mentioned bacterial classification, under 5 to 45 ℃ the temperature, behind the biochemical treatment 2-6 hour, add medicament reaction segregation lignin, product is filtered, and filter residue is used to make brick after processed, contain alkali in the filtrate, be used further to boiling;
Described medicament is lime, slaine and organic flocculating agent polyacrylamide system.
2. the improvement method of closed paper waste as claimed in claim 1, the adding proportion that it is characterized in that described bacterial classification is the 0.1-1% of black liquor gross weight.
3. the improvement method of closed paper waste as claimed in claim 1 is characterized in that described medicament slaine is the sulfate or the chloride of iron, ferrous, copper.
4. the improvement method of closed paper waste as claimed in claim 1 is characterized in that described medicament polyacrylamide is neutral polyacrylamide or hydrolyzed polyacrylamide.
5. the improvement method of closed paper waste as claimed in claim 3 is characterized in that the parts by weight proportioning of wherein said each medicament is:
Lime: 0.5-6 part; Slaine: 0.1-0.3 part;
Organic flocculating agent polyacrylamide is: 0.001-0.01 part.
6. the improvement method of closed paper waste as claimed in claim 1, the processing procedure that it is characterized in that described plain boiled water is with plain boiled water after filtering, filter liquor gets final product direct reuse.
7. the improvement method of closed paper waste as claimed in claim 6, the processing procedure that it is characterized in that described plain boiled water are must be with ozone or bleaching powder sterilization with plain boiled water filter liquor after filtering, and the addition of described ozone or bleaching powder is 1-10ppm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB991096363A CN100419155C (en) | 1999-07-01 | 1999-07-01 | Closed control method of paper-making waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB991096363A CN100419155C (en) | 1999-07-01 | 1999-07-01 | Closed control method of paper-making waste water |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1245845A CN1245845A (en) | 2000-03-01 |
| CN100419155C true CN100419155C (en) | 2008-09-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB991096363A Expired - Fee Related CN100419155C (en) | 1999-07-01 | 1999-07-01 | Closed control method of paper-making waste water |
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| CN (1) | CN100419155C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103757965B (en) * | 2014-01-15 | 2017-03-01 | 新疆国力源投资有限公司 | A kind of bioanalysises alkali recovery process of black liquid |
| CN108911232A (en) * | 2018-06-27 | 2018-11-30 | 灵璧县楚汉风纸业有限公司 | A kind of processing method of paper waste |
| CN114477609A (en) * | 2020-11-10 | 2022-05-13 | 湖南天童环保有限公司 | Agent and process for treating and utilizing papermaking wastewater and waste residues |
| CN114014459A (en) * | 2021-11-01 | 2022-02-08 | 杭州回水科技股份有限公司 | Recycling system and method for scum in air floatation and sedimentation integrated machine |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1044966A (en) * | 1989-02-20 | 1990-08-29 | 青岛海洋大学 | Recovery and reuse method of papermaking effuent |
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1999
- 1999-07-01 CN CNB991096363A patent/CN100419155C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1044966A (en) * | 1989-02-20 | 1990-08-29 | 青岛海洋大学 | Recovery and reuse method of papermaking effuent |
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| CN1245845A (en) | 2000-03-01 |
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Granted publication date: 20080917 Termination date: 20120701 |