CN102561085A - Technology for removing water insoluble matter in pulping black liquor - Google Patents
Technology for removing water insoluble matter in pulping black liquor Download PDFInfo
- Publication number
- CN102561085A CN102561085A CN2012100173533A CN201210017353A CN102561085A CN 102561085 A CN102561085 A CN 102561085A CN 2012100173533 A CN2012100173533 A CN 2012100173533A CN 201210017353 A CN201210017353 A CN 201210017353A CN 102561085 A CN102561085 A CN 102561085A
- Authority
- CN
- China
- Prior art keywords
- black liquor
- water
- pulping
- pulp making
- insoluble
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention discloses a technology for removing water insoluble matter in pulping cooking liquor (black liquor), belonging to the technical fields of pulping and paper making as well as energy conservation and emission reduction of pulping and paper making. According to the technology, polyacrylamide is adopted to treat the water insoluble matter in the pulping black liquor, and the removal rate is higher than 88%, so that the scaling phenomenon of the water insoluble matter on an evaporator in the process of evaporating and concentrating the pulping black liquor can be greatly reduced, the thermal efficiency of the evaporator can be improved, and the normal operation of an evaporation and concentration device can be guaranteed. Meanwhile, the product quality and yield of modified xylogen which is produced in the comprehensive resource utilization of the black liquor can be improved.
Description
Technical field
The invention belongs to pulping and paper-making and energy-conserving and emission-cutting technology field thereof, relate to the method for removing water-insoluble in the pulping back liquor.
Background technology
Paper industry is the mainstay industry of China, is again high, big, the with serious pollution industry of water consumption of the energy, resource consumption.Paper waste major pollutants COD discharge capacity accounts for 40% of national industrial wastewater total release; Not only perplex the sound development of paper industry; The more important thing is ecological environment is caused very big destruction, have a strong impact on people's health, be unfavorable for the structure of economizing type, environmentally friendly harmonious society.Wherein the COD of pulping back liquor generation accounts for more than 90% of paper industry COD total amount, has the characteristic of concentration height and difficult degradation.At present, the black liquor of pulp making treatment technology is main with alkali recovery technology and comprehensive utilization of resources, and these two kinds of methods all relate to the evaporation and concentration of black liquor, and black liquor must evaporation and concentration just can be done further processing to finite concentration.
In paper-making process, the pulping fibre raw material is through doing-wet feed preparation, carries out boiling, shove obtains black liquor.Black liquor thickness and contain the water-insoluble of 0.3-0.5%, water-insoluble is main with fiber fines and silt, is mainly brought into by pulping raw material, the filter method through routine is difficult for removing.In the black liquor of pulp making evaporating concentration process, water-insoluble very easily causes fouling of evaporator, and foulant is difficult to remove, and causes that the equipment evaporation efficiency reduces, energy consumption is high, even the operation that jeopardizes evaporate station, is the technical barrier of present evaporate station evaporation black liquor.
" process for removing lignin from black liquor in making paper by soda pulping " (ZL99116492.X) (ZL200410060208.9) authorized patent of invention early stage for the applicant with " the agricultural byproducts stalk resource is produced paper and modified lignin resin technology "." process for removing lignin from black liquor in making paper by soda pulping " destroyed the molecular structure of material in the black liquor of pulp making in processing procedure, can only produce low value-added lignin product, and produce market is narrow, slack market." the agricultural byproducts stalk resource is produced paper and modified lignin resin technology " carried out modification processing to lignin, gives good physicochemical property, forms the fine chemical product of high added value.Since this technology industrialization,, influenced the evaporation and concentration of black liquor because water insoluble matter content is high in the black liquor of pulp making; There are problems such as fouling of evaporator, the evaporation equipment thermal efficiency are low, energy consumption height; Also influence the quality and the output of modified lignin resin product simultaneously, when being used for cement water reducing agent, because water insoluble matter content is higher such as the modified lignin resin product; Cause concrete 's air-containing high; Its later strength is reduced, influence concrete quality, become one of bottleneck that influences the modified lignin resin industry healthy development.Be badly in need of at present the paper-making pulping black liquor treatment process is improved, remove water-insoluble in the pulping back liquor, satisfy the suitability for industrialized production demand.
Summary of the invention
For improving product quality and the output that modified lignin resin is produced in the comprehensive utilization of evaporator evaporation efficient and black liquor and development as resource; Solve the problem that present paper-making pulping black liquor treatment process exists, the object of the invention is to propose a kind of new technology of removing the paper-making pulping black liquor water-insoluble.
Be to realize the object of the invention, the present invention as finishing agent, on the basis of not destroying the black liquor of pulp making molecular structure, handles the water-insoluble in the black liquor of pulp making with polyacrylamide, uses the centrifuge centrifugation then, purifies slurrying night.
Concrete through the following steps realization:
1, polyacrylamide is dissolved in the water, is mixed with the polyacrylamide solution that mass fraction is 0.05-0.5%.
2, black liquor of pulp making and the above-mentioned polyacrylamide solution for preparing are mixed through static mixer, mixed liquid adopts centrifuge to carry out centrifugation.
In solid content, every cubic metre of black liquor of pulp making adds polyacrylamide 10-200g.
3, isolated water-insoluble is as Treatment of Sludge, and the black liquor of pulp making after the separation gets into evaporimeter and carries out evaporation and concentration, and the black liquor of pulp making after concentrating extracts lignin.
Black liquor of pulp making extracts lignin and can adopt alkali recovery technology to handle, or adopts the comprehensive utilization of resources method to produce broad-spectrum lignin product.
Used polyacrylamide is one or more in PAMC, PAMA, non-ionic polyacrylamide or the amphion polyacrylamide.
Get the black liquor of pulp making after a certain amount of the present invention handles, use the middling speed filter paper filtering, deionized water washing filter paper to constant weight, is measured water insoluble matter content at 105 ℃ of oven dry filter paper more than 5 times, and it is worth between 0.03-0.07%.
Characteristics of the present invention are: adopt polyacrylamide as finishing agent; Remove the water-insoluble in the paper-making pulping black liquor; On the basis of not destroying the black liquor of pulp making molecular structure; Fast and effeciently the treatment and purification black liquor of pulp making had both ensured the normal operation of black liquor vaporizing concentrator, had improved product quality and output that the modified lignin resin product is produced in the black liquor and development as resource comprehensive utilization simultaneously again.Water-insoluble with 0.3-0.5% in the black liquor of pulp making is reduced to 0.03-0.07%, and clearance reaches more than 88%.In the black liquor vaporizing concentration process, can reduce water-insoluble fouling on evaporimeter effectively, improve the thermal efficiency of evaporimeter, cut down the consumption of energy, ensure the normal operation of evaporate station.
When influence and the modified lignin resin that water-insoluble is produced water-insoluble in the modified lignin resin product to black liquor and development as resource comprehensive utilization in the paper-making pulping black liquor is used for cement water reducing agent concrete influence is seen the following form:
Table one: water-insoluble is to modified lignin resin and concrete influence in the black liquor of pulp making
Remarks: black liquor of pulp making is a Wugang City Haiming Science & Technology Co.,Ltd sulfite pulping black liquor in the table, and it is 0.25% that modified lignin resin is used for the cement water reducing agent addition.
Description of drawings
Fig. 1 doesProcess chart of the present invention.
The specific embodiment
Embodiment 1:
Get 500g PAMA (solid content >=90%, molecular weight 8,000,000, anion concentration 30%), be dissolved in the 500kg water.
Alkaline pulping black liquor 10m
3(60 ℃, 7.0 ° of Be') mix with above-mentioned polyacrylamide solution through static mixer, and mixed liquid adopts centrifuge to carry out centrifugation.Isolated water-insoluble is as Treatment of Sludge, and the black liquor of pulp making after the separation gets into evaporimeter and carries out evaporation and concentration, and the black liquor of pulp making after concentrating extracts lignin.
The former content of alkaline pulping black liquor water-insoluble is 0.48%, and handling back black liquor water insoluble matter content is 0.05%, clearance 89.6%.
Embodiment 2:
Get 1000g PAMA (solid content >=90%, molecular weight 8,000,000, anion concentration 30%), be dissolved in the 500kg water.
Alkaline pulping black liquor 10m
3(60 ℃, 7.0 ° of Be') mix with above-mentioned polyacrylamide solution through static mixer.Mixed liquid adopts centrifuge to carry out centrifugation.Isolated water-insoluble is as Treatment of Sludge, and the black liquor of pulp making after the separation gets into evaporimeter and carries out evaporation and concentration, and the black liquor of pulp making after concentrating extracts lignin.
The former content of alkaline pulping black liquor water-insoluble is 0.48%, and handling back black liquor water insoluble matter content is 0.04%, clearance 91.7%.
Embodiment 3:
Get 500g PAMC (solid content >=90%, molecular weight 500,000, cation concn 30%), be dissolved in the 500kg water.
Alkaline pulping black liquor 10m
3(60 ℃, 7.0 ° of Be') mix with above-mentioned polyacrylamide solution through static mixer, and mixed liquid adopts centrifuge to carry out centrifugation.Isolated water-insoluble is as Treatment of Sludge, and the black liquor of pulp making after the separation gets into evaporimeter and carries out evaporation and concentration, and the black liquor of pulp making after concentrating extracts lignin.
The former content of alkaline pulping black liquor water-insoluble is 0.48%, and handling back black liquor water insoluble matter content is 0.04%, clearance 91.7%.
Embodiment 4:
Get 500g PAMA (solid content >=90%, molecular weight 8,000,000, anion concentration 30%), be dissolved in the 500kg water.
Sulfite pulping black liquor 10m
3(60 ℃, 7.0 ° of Be') mix with above-mentioned polyacrylamide solution through static mixer.Mixed liquid adopts centrifuge to carry out centrifugation.Isolated water-insoluble is as Treatment of Sludge, and the black liquor of pulp making after the separation gets into evaporimeter and carries out evaporation and concentration, and the black liquor of pulp making after concentrating extracts lignin.
The former content of sulfite pulping black liquor water-insoluble is 0.46%, and handling back black liquor water insoluble matter content is 0.05%, clearance 89.1%.
Embodiment 5:
Get 1000g non-ionic polyacrylamide (solid content >=90%, molecular weight 3,000,000), be dissolved in the 500kg water.
Sulfite pulping black liquor 10m
3(60 ℃, 7.0 ° of Be') mix with above-mentioned polyacrylamide solution through static mixer.Mixed liquid adopts centrifuge to carry out centrifugation.Isolated water-insoluble is as Treatment of Sludge, and the black liquor of pulp making after the separation gets into evaporimeter and carries out evaporation and concentration, and the black liquor of pulp making after concentrating extracts lignin.
The former content of sulfite pulping black liquor water-insoluble is 0.46%, and handling back black liquor water insoluble matter content is 0.04%, clearance 91.3%.
Embodiment 6:
Get 500g amphion polyacrylamide (solid content >=90%, molecular weight 4,000,000, ion concentration 30%), be dissolved in the 500kg water.
Sulfite pulping black liquor 10m
3(60 ℃, 7.0 ° of Be') mix with above-mentioned polyacrylamide solution through static mixer.Mixed liquid adopts centrifuge to carry out centrifugation.Isolated water-insoluble is as Treatment of Sludge, and the black liquor of pulp making after the separation gets into evaporimeter and carries out evaporation and concentration, and the black liquor of pulp making after concentrating extracts lignin.
The former content of sulfite pulping black liquor water-insoluble is 0.46%, and handling back black liquor water insoluble matter content is 0.04%, clearance 91.3%.
Claims (3)
1. technology of removing the black liquor of pulp making water-insoluble is characterized in that: realize through following steps:
(1), polyacrylamide is dissolved in the water, be mixed with the polyacrylamide solution of mass fraction 0.05-0.5%;
(2), black liquor of pulp making, the above-mentioned polyacrylamide solution for preparing are mixed through static mixer, mixed liquid adopts centrifuge to carry out centrifugation;
(3), isolated water-insoluble is as Treatment of Sludge, the black liquor of pulp making after the separation is sent into evaporimeter and is carried out evaporation and concentration, the black liquor of pulp making after concentrating extracts lignin.
2. the technology of removal black liquor of pulp making water-insoluble according to claim 1 is characterized in that: used polyacrylamide is one or more in PAMC, PAMA, non-ionic polyacrylamide or the amphion polyacrylamide.
3. the technology of removal black liquor of pulp making water-insoluble according to claim 1 is characterized in that: used polyacrylamide is in solid content, every cubic metre of black liquor of pulp making addition 10-200g.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100173533A CN102561085A (en) | 2012-01-19 | 2012-01-19 | Technology for removing water insoluble matter in pulping black liquor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100173533A CN102561085A (en) | 2012-01-19 | 2012-01-19 | Technology for removing water insoluble matter in pulping black liquor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102561085A true CN102561085A (en) | 2012-07-11 |
Family
ID=46407576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100173533A Pending CN102561085A (en) | 2012-01-19 | 2012-01-19 | Technology for removing water insoluble matter in pulping black liquor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102561085A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109179845A (en) * | 2018-11-16 | 2019-01-11 | 河南省科学院化学研究所有限公司 | A kind of disposal of resources method of sulfate method pulp black liquor |
| CN109251322A (en) * | 2018-11-16 | 2019-01-22 | 河南省科学院化学研究所有限公司 | Utilize the method for sulfate pulping black liquor production sodium lignin sulfonate |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51140891A (en) * | 1975-05-30 | 1976-12-04 | Kurita Water Ind Ltd | Anti-scale agent for black liquor evaporator |
| CN1397684A (en) * | 2001-07-13 | 2003-02-19 | 阮键华 | Process for treating and reclaiming black paper-making liquid generated by alkali pulping |
| CN1408945A (en) * | 2001-09-18 | 2003-04-09 | 张承绍 | Process for treating waste water of paper-making |
| CN1755012A (en) * | 2002-08-06 | 2006-04-05 | 周心光 | The comprehensive processing method of paper-making sewage black liquor |
-
2012
- 2012-01-19 CN CN2012100173533A patent/CN102561085A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51140891A (en) * | 1975-05-30 | 1976-12-04 | Kurita Water Ind Ltd | Anti-scale agent for black liquor evaporator |
| CN1397684A (en) * | 2001-07-13 | 2003-02-19 | 阮键华 | Process for treating and reclaiming black paper-making liquid generated by alkali pulping |
| CN1408945A (en) * | 2001-09-18 | 2003-04-09 | 张承绍 | Process for treating waste water of paper-making |
| CN1755012A (en) * | 2002-08-06 | 2006-04-05 | 周心光 | The comprehensive processing method of paper-making sewage black liquor |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109179845A (en) * | 2018-11-16 | 2019-01-11 | 河南省科学院化学研究所有限公司 | A kind of disposal of resources method of sulfate method pulp black liquor |
| CN109251322A (en) * | 2018-11-16 | 2019-01-22 | 河南省科学院化学研究所有限公司 | Utilize the method for sulfate pulping black liquor production sodium lignin sulfonate |
| CN109179845B (en) * | 2018-11-16 | 2021-06-25 | 河南省科学院化学研究所有限公司 | Resourceful treatment method for sulfate process wood pulp black liquor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101775750B (en) | A clear pulp production process for realizing complete comprehensive utilization and removing three wastes | |
| CN105111318A (en) | Preparation method for anionic dicarboxy cellulose green flocculation material | |
| CN103482809A (en) | Technology for realizing zero discharge of waste water caused by white carbon black production | |
| CN104925929B (en) | A kind of composite flocculation agent for treatment of dyeing wastewater | |
| CN107638872B (en) | Fly ash/magnetic straw composite material and preparation method and application thereof | |
| CN103254443A (en) | Preparation method of textile waste cellulose based sewage flocculant | |
| CN102070287B (en) | Process for reducing chloride ions in white mud from ammonia soda plants | |
| CN102561085A (en) | Technology for removing water insoluble matter in pulping black liquor | |
| CN102515395A (en) | Method and device for using small-aperture spiral wound ultrafiltration membranes to treat papermaking wastewater | |
| CN101863636A (en) | Printing and dyeing sludge recycling method | |
| CN102849910A (en) | Method for recovering humic acid from sludge and improving anaerobic digestion of sludge | |
| CN102677514A (en) | Re-pulping method for high wet strength waste paper containing PAE resin | |
| CN102897987A (en) | Papermaking sludge dehydration composite biological enzyme treating agent and processing method | |
| CN102849916A (en) | Dewatering method for papermaking sludge | |
| CN106007230B (en) | Treatment method for removing cellulose in papermaking wastewater | |
| CN103922505A (en) | Method for deep treatment on tea bag filter paper making bleach by using nanofiltration membrane | |
| CN105218833A (en) | A kind of sulphite papermaking wastewater prepares the method for sulfonated lignin | |
| CN102964025B (en) | Method for prevention and elimination of scaling in papermaking wastewater closed circulation system | |
| CN102408167B (en) | Method for realizing grey water recycling of sewage produced in waste mortar recovery process | |
| CN102153223A (en) | Sodium carboxymethylcellulose industrial sewage recycling device | |
| CN201999825U (en) | Sodium carboxy methyl cellulose industrial sewage recycling device | |
| WO2013159534A1 (en) | Method for treating wastewater resulting from wool-washing by coupling ultrasonic wave demulsification and supercritical water oxidation | |
| CN103011502A (en) | Method for deeply treating waste paper pulping and papermaking comprehensive wastewater by using ultrafiltration membrane | |
| CN201195068Y (en) | Water-saving device for xylose manufacturing process | |
| CN106007231B (en) | Treatment system for removing cellulose in papermaking wastewater |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120711 |