CN101148283A - Paper-making deinking sewage treatment method - Google Patents
Paper-making deinking sewage treatment method Download PDFInfo
- Publication number
- CN101148283A CN101148283A CNA2007100764867A CN200710076486A CN101148283A CN 101148283 A CN101148283 A CN 101148283A CN A2007100764867 A CNA2007100764867 A CN A2007100764867A CN 200710076486 A CN200710076486 A CN 200710076486A CN 101148283 A CN101148283 A CN 101148283A
- Authority
- CN
- China
- Prior art keywords
- sewage
- water
- deinking
- soluble polymers
- treatment process
- 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
Landscapes
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The deinking waste water treating process for papermaking includes the first adding expandable clay in 1-200 ppm and water soluble polymer in 1-20 ppm into the deinking waste water and the subsequent treating the deinking waste water in deinking waste water treating apparatus. The process has high deinking waste water treating effect, low cost and no need of altering the technological conditions of deinkng alkali process.
Description
Technical field
The invention belongs to a kind of sewage water treatment method, particularly a kind of paper-making deinking sewage treatment method.
Background technology
Waste paper is important paper making raw material.Because most waste paper are through ink printings,, remove by flotation, bleaching and washing then so printing ink must be removed from fiber during reuse.Otherwise little printing ink spot can appear in the paper surface with waste paper production, influences texture of paper.Deinking is an important procedure of making cultural paper, newsprinting paper, paper for daily use and packing board.
The deinking technology that extensively adopts is the alkaline process deinking at present.In paper waste, add a series of chemical such as sodium hydroxide during deinking, impel printing ink under alkaline condition, to peel off from fiber surface, and in flotation and washing process with fiber separation, stay in the water and discharge.
Deinking workshop section produces large amount of sewage and need recycle, and contains impurity such as a large amount of printing ink, resin, fiber, filler and chemical assistant in the deinking sewage, must remove these pollution substances through handling, and just can be back to production process.Obviously, to the quality of deinking sewage disposal, can directly influence the effect of deinking, the whiteness and the technology cost of paper pulp.
Deinking sewage disposal at present is based on air supporting.During processing, send in effluent stream to pump into air pressurized in the pipeline, after sewage entered air flotation slot, the air in the sewage moved upward with bubble form, impurity in the sewage is together taken out of the water surface, and the impurity that air flotation slot water surface scraper plate will float is again released air flotation slot and is removed.In this process, only rely on the mechanical effect of treatment facility-air flotation slot itself to be difficult to reduce effectively the content of suspended solids in the sewage (SS), dissolved organic matter and anionic trash and the colourity of water.Therefore, chemical assistant is added in a lot of paper mills in deinking sewage, makes that dispersive impurity flocculates in the sewage, relends the strength that helps the air come-up, strengthens impurity in the water and float degree in air flotation slot, and raising air supporting processing efficiency improves result.
At present extensively the deinking sewage disposal chemical assistant that adopts is formed the binary flocculation system by flocculation agent (alum, polymerize aluminum chloride or organic deciding agent) and cationic-type polyacrylamide and (is called in the following text: the conventional chemical system).Earlier in sewage, add flocculation agent, sewage is carried out pre-treatment; And then in sewage, add polyacrylamide.Flocculation agent can improve the treatment effect of polyacrylamide to a certain extent.But the contriver finds, uses the conventional chemical system to handle, and has a lot of problems, and its treatment effect still is difficult to reach the requirement that the paper mill increases day by day to water treatment.At first, the reaction mechanism of cationic chemical is positive electronegativity combination, this mechanism can be effectively with sewage in the anionic impurity reaction, but be difficult to remove effectively non-electrical pollution substance in the sewage.Secondly, flocculation agent is an acidic chemical, can influence the pH value of alkaline process deinking process when treating water is back to the deinking workshop, causes the change of the processing condition of alkaline process deinking.In addition, select flocculation agent for use, especially wherein organicly deciding this strong electropositivity organic compound of agent, processing cost is higher.
Still need a kind of processing cost low at present, can further improve the deinking wastewater treatment efficiency, can not cause the treatment process of the processing condition change of alkaline process deinking.
Summary of the invention
The technical problem that the embodiment of the invention will solve is to provide a kind of processing cost low, can further improve the deinking wastewater treatment efficiency, can not cause the paper-making deinking sewage treatment method of the processing condition change of alkaline process deinking.
The embodiment of the invention is achieved in that a kind of paper-making deinking sewage treatment method, adopts the deinking sewage disposal device to carry out the deinking sewage disposal, but adds swollen clay and water-soluble polymers before deinking sewage enters sewage disposal device in sewage.
Contain various electrical impurity in the deinking sewage, prior art adopts to be formed the binary flocculation system by flocculation agent (alum, polymerize aluminum chloride or organic deciding agent) and cationic-type polyacrylamide sewage is carried out pre-treatment, it relies on electrical neutralizing mechanism fully, can only remove electronegative impurity in the water effectively.And the deinking sewage treatment method utilization that technique scheme provides is electrically reacted and be adsorbed as the mechanism of action, thereby can remove more impurity in the water.Experimental results show that, adopt technical scheme provided by the invention, can obviously accelerate the ascent rate of floc sedimentation in the sewage, impurity such as suspended solids in the water are obviously reduced, the turbidity of water also obviously descends, when adopting the airfloat equipment scrubbing, airfloat equipment can be enhanced about more than once to the average removal rate of turbidity and suspended solid amount (SS), the deinking sewage treatment effect be improved significantly.And, but because the swollen clay that adopts in the technique scheme is an alkaline chemical, compatible with alkaline deinking process, so the treating water reuse does not change the processing condition of alkaline process deinking.In addition, but the swollen clay is a crude substance, and tooling cost is low, thereby has reduced processing cost.
Description of drawings
Fig. 1 carries out turbidity removal rate (%) curve synoptic diagram that the deinking sewage disposal obtains for the method that adopts Comparative Examples to provide;
Clearance (%) curve synoptic diagram of the suspended solid amount (SS) that the deinking sewage disposal obtains is provided for the method that adopts Comparative Examples to provide Fig. 2;
Fig. 3 carries out turbidity removal rate (%) curve synoptic diagram that the deinking sewage disposal obtains for the method that adopts a preferred embodiment of the present invention to provide;
Clearance (%) curve synoptic diagram of the suspended solid amount (SS) that the deinking sewage disposal obtains is provided for the method that adopts a preferred embodiment of the present invention to provide Fig. 4.
Embodiment
In order to make the technical problem to be solved in the present invention, technical scheme and beneficial effect clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
The paper-making deinking sewage treatment method that the embodiment of the invention provides, adopt the deinking sewage disposal device to carry out the deinking sewage disposal, but before entering sewage disposal device, deinking sewage in sewage, adds swollen clay and water-soluble polymers, wherein, but the adding total amount of swollen clay in sewage is 1-200ppm, preferred 10-100ppm, the adding total amount of water-soluble polymers in sewage is 1-20ppm, preferred 2-5ppm.
Described treatment facility is the deinking sewage disposal device that this area is used always, for example air-float technology equipment.But described swollen clay and water-soluble polymers can adopt the mode of pumping or inflow naturally to join in the sewage, both can be mixed adding, also can be first adding water soluble polymkeric substance, but after add the swollen clay, but or and preferably add swollen clay, back adding water soluble polymkeric substance earlier.
But but described swollen clay is a swollen clay well known in the art, can be the preparation of dry powder or pulpous state form, for example can be selected from montmorillonite, hectorite, talcum powder, sepiolite, wilkinite, diatomite and the bentonite one or more, wherein preferred wilkinite.Exist with metallic forms but described swollen clay is many, for example: sodium base, calcium base, magnesium base, lithium base clay etc.But but the swollen clay can be swollen clay natural or the process modification.The method of this modification is the method that this area is used always, wherein is example with the wilkinite, and it can adopt modes such as high-temperature roasting activation, acid solution activation, salts solution activation and organism activation to carry out modification.
Described water-soluble polymers is selected this area water-soluble polymers commonly used for use, for example can select cationic, non-ionic, anionic or amphoteric water-soluble polymers for use, wherein the water-soluble polymers of preferred anionic; Can be natural or synthetic polymer, can have any molecular weight, preferred molecular weight water-soluble polymers, preferred especially high molecular weight anionic water-soluble polymers.Described high molecular should be molecular weight greater than 5,000,000.This water-soluble polymers is single polymers or wherein several multipolymer a kind of in acrylamide, Methacrylamide, N-substituted acrylamide, acrylate, acrylate, vinylformic acid, ammonio methacrylate and the ethyliminum; Also can be through hydrolytic reagent, starch, Mierocrystalline cellulose, chitose or organic-silicon-modified acrylamide polymer.
Above-mentioned water-soluble polymers can be any physical form water-soluble polymers, and for example the aqueous solution, water-in-oil emulsion, O/w emulsion and drying become pearl or Powdered dry powder.
Get the deinking sewage sample, in the factory laboratory, stir, in sewage, add wilkinite earlier, add anionic polyacrylamide again with multi-joint agitator, wilkinite adds total amount in sewage be 50ppm, and anionic polyacrylamide adds total amount in sewage be 3ppm.Observe floc sedimentation size and the sinking velocity under agitation condition, measure the turbidity of handling back water simultaneously, measuring result sees Table 1.
Except that wilkinite adds total amount in sewage is the 100ppm, and all the other are identical with embodiment 1.
Get the deinking sewage sample, in the factory laboratory, stir, in sewage, add montmorillonite earlier, add anionic polyacrylamide again with multi-joint agitator, montmorillonite adds total amount in sewage be 60ppm, and anionic polyacrylamide adds total amount in sewage be 3ppm.Observe floc sedimentation size and the sinking velocity under agitation condition, measure the turbidity of handling back water simultaneously, measuring result sees Table 1.
Embodiment 4
Except that montmorillonite adds total amount in sewage is the 80ppm, and all the other are identical with embodiment 3.
Embodiment 5
Except that montmorillonite adds total amount in sewage is the 120ppm, and all the other are identical with embodiment 3.
Comparative Examples 1
Do not add any auxiliary agent in sewage, observe floc sedimentation size and the sinking velocity under agitation condition, measure the turbidity of handling back water simultaneously, measuring result sees Table 1.
Comparative Examples 2
Get the deinking sewage sample, in the factory laboratory, stir with multi-joint agitator, in sewage, add the conventional chemical system that organic flocculation agent and cationic polyacrylamide are formed, observe floc sedimentation size and the sinking velocity under agitation condition then, measure the turbidity of handling back water simultaneously, measuring result sees Table 1.
The floc sedimentation lowering speed of range estimation is divided into 4 grades from slow to fast in the table 1, is followed successively by A
1, A
2, A
3, A
4
Table 1
| Embodiment 4 | - | - | 80 | 3 | A 3 | 95 | 78.9 |
| Embodiment 5 | - | - | 120 | 3 | A 4 | 43 | 90.4 |
Referring to table 1 as can be seen, turbidity reduced rate with respect to conventional chemical system 51.1%, use the wilkinite of 50ppm and the cloudy sub-polyacrylamide of 3ppm to handle deinking sewage, the sinking velocity of floc sedimentation is obviously accelerated, impurity such as the suspended solids in the water obviously reduce, the turbidity of water obviously descends, and the turbidity reduced rate brings up to 86.7%.When increasing bentonite consumption to 100ppm gradually, the sewage turbidity continues to descend, and decrement brings up to 94.9%.Referring to table 1 also as can be seen, use montmorillonite and cloudy sub-polyacrylamide to handle deinking sewage, the sinking velocity of floc sedimentation is obviously accelerated, and impurity such as the suspended solids in the water obviously reduce, and the turbidity of water obviously descends, and the turbidity reduced rate obviously improves.
Embodiment 6
With the deinking sewage of air-float technology device processes deinking slip house discharge, and before entering air-float technology equipment, sewage adds 40-60ppm wilkinite and 2-4ppm anionic polyacrylamide respectively.Test air equipment is to the clearance of turbidity, and test result is seen Fig. 3.Test air equipment is to the clearance of suspended solid amount (SS), and test result is seen Fig. 4.
Comparative Examples 6
The deinking sewage of discharging with air-float technology device processes deinking slip house, and before sewage enters air-float technology equipment, add the conventional chemical system that the organic flocculation agent of 10-15ppm and 4-6ppm cationic polyacrylamide are formed.Test air equipment is to the clearance of turbidity, and test result is referring to Fig. 1.Test air equipment is to the clearance of suspended solid amount (SS), and test result is referring to seeing Fig. 2.
Referring to Fig. 1 and Fig. 3 as can be seen, airfloat equipment brings up to 62.9% to the average removal rate of turbidity from 29.5%; Referring to Fig. 2 and Fig. 4 as can be seen, airfloat equipment brings up to 66.7% to the average removal rate of suspended solid amount (SS) from 38.3%; The removal effect of turbidity and SS be improved significantly.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a paper-making deinking sewage treatment method adopts the deinking sewage disposal device to carry out the deinking sewage disposal, it is characterized in that, but added swollen clay and water-soluble polymers in sewage before deinking sewage enters described sewage disposal device.
2. treatment process according to claim 1 it is characterized in that, but the adding total amount of described swollen clay in sewage is 1-200ppm that the adding total amount of water-soluble polymers in sewage is 1-20ppm.
3. as treatment process as described in the claim 2, it is characterized in that, but the adding total amount of described swollen clay in sewage is 10-100ppm that the adding total amount of water-soluble polymers in sewage is 2-5ppm.
4. deinking sewage treatment method as claimed in claim 3 is characterized in that, but adds described swollen clay earlier in sewage, adds described water-soluble polymers then.
5. as treatment process as described in the claim 1-4, it is characterized in that, but described swollen clay is selected from montmorillonite, hectorite, talcum powder, sepiolite, wilkinite, diatomite and the bentonite one or more.
6. as treatment process as described in the claim 5, it is characterized in that, but but described swollen clay is natural or through the swollen clay of modification.
7. as treatment process as described in the claim 6, it is characterized in that, but described natural or be sodium base, calcium base, magnesium base or lithium base clay through the swollen clay of modification.
8. as claim 1-4 treatment process as described in each, it is characterized in that described water-soluble polymers is cationic water-soluble polymer, non-ionic water-soluble polymer, anionic water-soluble polymer or amphoteric water-soluble polymers.
9. as treatment process as described in the claim 8, it is characterized in that described water-soluble polymers is a molecular weight water-soluble polymers.
10. as treatment process as described in the claim 9, it is characterized in that described water-soluble polymers is single polymers or wherein several multipolymer a kind of in acrylamide, Methacrylamide, N-substituted acrylamide, acrylate, acrylate, vinylformic acid, ammonio methacrylate and the ethyliminum; Or be through hydrolytic reagent, starch, Mierocrystalline cellulose, chitose or organic-silicon-modified acrylamide polymer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100764867A CN101148283A (en) | 2007-08-16 | 2007-08-16 | Paper-making deinking sewage treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100764867A CN101148283A (en) | 2007-08-16 | 2007-08-16 | Paper-making deinking sewage treatment method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101148283A true CN101148283A (en) | 2008-03-26 |
Family
ID=39248996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100764867A Pending CN101148283A (en) | 2007-08-16 | 2007-08-16 | Paper-making deinking sewage treatment method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101148283A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105016415A (en) * | 2014-04-30 | 2015-11-04 | 中国石油化工股份有限公司 | Circulation method for recovering organic acid from organic acid lithium waste water |
| CN105155325A (en) * | 2015-08-13 | 2015-12-16 | 合肥龙发包装有限公司 | Biological wastepaper deinking method |
| CN106542718A (en) * | 2015-09-23 | 2017-03-29 | 上海广神生态环保科技有限公司 | The method that deep dehydration is carried out to sludge |
| CN109052601A (en) * | 2018-08-10 | 2018-12-21 | 宁波帝杨电子科技有限公司 | A kind of pulping wastewater treatment efficient flocculant and preparation method thereof |
| CN114853135A (en) * | 2022-04-07 | 2022-08-05 | 湖南浏阳经开区水务股份有限公司 | Method for treating ultralow-turbidity water with efficient coagulation aid |
-
2007
- 2007-08-16 CN CNA2007100764867A patent/CN101148283A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105016415A (en) * | 2014-04-30 | 2015-11-04 | 中国石油化工股份有限公司 | Circulation method for recovering organic acid from organic acid lithium waste water |
| CN105016415B (en) * | 2014-04-30 | 2019-08-27 | 中国石油化工股份有限公司 | A kind of round-robin method of organic acid lithium Sewage treatment organic acid |
| CN105155325A (en) * | 2015-08-13 | 2015-12-16 | 合肥龙发包装有限公司 | Biological wastepaper deinking method |
| CN106542718A (en) * | 2015-09-23 | 2017-03-29 | 上海广神生态环保科技有限公司 | The method that deep dehydration is carried out to sludge |
| CN109052601A (en) * | 2018-08-10 | 2018-12-21 | 宁波帝杨电子科技有限公司 | A kind of pulping wastewater treatment efficient flocculant and preparation method thereof |
| CN114853135A (en) * | 2022-04-07 | 2022-08-05 | 湖南浏阳经开区水务股份有限公司 | Method for treating ultralow-turbidity water with efficient coagulation aid |
| CN114853135B (en) * | 2022-04-07 | 2023-10-20 | 湖南浏阳经开区水务股份有限公司 | Treatment method of high-efficiency coagulation-assisting ultra-low turbidity water |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0522334B1 (en) | A method of treating BCTMP/CTMP wastewater | |
| US5454955A (en) | Use of hectorite as a clarification aid for deink plant effluent | |
| CN101811764A (en) | Efficient ecological type sewage and sludge treating agent and preparation method thereof | |
| CN101148283A (en) | Paper-making deinking sewage treatment method | |
| EP0204404A1 (en) | Retention and/or drainage and/or dewatering aid | |
| FI106950B (en) | Dewatering of aqueous suspensions | |
| CN102951756A (en) | Method for treating alkaline printing and dyeing wastewater by utilizing waste acid | |
| EP0775165B1 (en) | Dadmac/vinyl trialkoxysilane copolymers and their use in wastewater treatment | |
| AU2013298635B2 (en) | Concentration of suspensions | |
| WO2018227356A1 (en) | Method for treating sludge | |
| Ho et al. | Comparison of chemical flocculation and dissolved air flotation of anaerobically treated palm oil mill effluent | |
| CN115340163B (en) | Paint mist coagulant and preparation method thereof | |
| US3374143A (en) | Method of improving operational efficiency of white water recovery system by treatment with anionic copolymers of acrylic acid salts and acrylamide | |
| CN1218088C (en) | Method for reducing contamination from cellulosic suspensions | |
| JP4502989B2 (en) | Wastewater treatment method | |
| CN100537460C (en) | Process for reclaiming PVC slurry waste water using liquid phase suspension method | |
| JP4142598B2 (en) | Waste liquid treatment method | |
| CN112195681A (en) | PAC (polyaluminium chloride) adding process for wet end of paper machine | |
| JP2938270B2 (en) | Waste paper pulp wastewater treatment method | |
| CN214735236U (en) | Papermaking wastewater treatment system | |
| JPH1133563A (en) | Treatment of used paper pulp waste water | |
| JP3937102B2 (en) | Deinking wastewater treatment method | |
| CN2698772Y (en) | Waste water treatment equipment for waste paper deinking and pulping | |
| JP3654119B2 (en) | Deinking agent and method for producing waste paper pulp | |
| JP7547296B2 (en) | Method for treating oil-containing wastewater and water treatment device for oil-containing 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 |
Open date: 20080326 |