CN101700921B - Polymer coagulant - Google Patents
Polymer coagulant Download PDFInfo
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- CN101700921B CN101700921B CN2009101993576A CN200910199357A CN101700921B CN 101700921 B CN101700921 B CN 101700921B CN 2009101993576 A CN2009101993576 A CN 2009101993576A CN 200910199357 A CN200910199357 A CN 200910199357A CN 101700921 B CN101700921 B CN 101700921B
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- polymer coagulant
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Abstract
The invention relates to a polymer coagulant which contains the following components by weight percent: 5%-25% of anionic polyacrylamide, 5%-25% of cationic polyacrylamide, 5%-25% of non-ionic polyacrylamide, 3%-15% of dispersant and 40%-60% of water. The polymer coagulant is in solution state, and the range of pH value is 6.5-7.5; and the polyacrylamide is a water-soluble substance with a net structure. The polymer coagulant provided by the invention can be used in sewage treatment with larger change range of pH value and has high treatment efficiency and significant effects, and the clarity of water after the treatment is high; the polymer coagulant is in the solution state, has stable performances and can be configured to be the solution with very low concentration, the solution can not be degraded, the dosing quantity is convenient to control, when in use, the long-term dispersion and the stirring are unnecessary, the polymer coagulant can be used anytime and anywhere, and the operation is safe and convenient; and the polymer coagulant can be preserved for a long time, and the production cost can be reduced.
Description
Technical field
The present invention relates to a kind of water treatment reagent, particularly, relate to a kind of polymer coagulant, be applied to various sewage treatment process.
Background technology
In all multi-methods of wastewater treatment, it is few to adopt chemical reagent to be that main process for purifying water has a facility investment, take up an area of few, flow process end, advantage such as sludge settling is fast, and working cost is relatively low.At present, the method that adopts polyacrylamide to carry out sewage disposal as the agent of wadding a quilt with cotton with fixed attention is comparatively general.Polyacrylamide (Polyacrylamide) is called for short PAM, is polymerized by acrylamide monomer, and be a kind of water-soluble linear macromolecule material.Monomer acrylamide chemical property is very active; can carry out a series of chemical reaction at two keys and amide group place; adopt different technology, import different functional groups, can obtain different electric charge products: negatively charged ion, positively charged ion, nonionic, zwitter-ion polyacrylamide.The molecular-weight average of PAM has some functional groups with upper edge key shape molecule from thousands of to tens million of, can most of ionization in water, belong to polymer electrolyte.According to the characteristic of its dissociable group be divided into anionic (as--COOH,--SO3H,--OSO3H etc.) cationic (as--NH3OH,--NH2OH ,-CONH3OH) and non-ionic type.Product appearance is a white powder, soluble in water, be dissolved in benzene hardly, common organic solvents such as ether, ester class, acetone, the thick liquid of several near-transparents of its aqueous solution belongs to non-dangerous goods, nontoxic, non-corrosiveness, solid PAM has water absorbability, and water absorbability increases with the increase of ion degree, the PAM Heat stability is good; Be heated to 100 ℃ and have good stability, but easily decompose more than 150 ℃ the time produce in nitrogen, in intermolecular generation imidization effect and water insoluble.
But it is following not enough that the using polypropylene acid amides carries out the method ubiquity of sewage disposal: 1. solidify the polyacrylamide dissolved time agglomeratingly easily, long-time vigorous stirring can make its performance reduce again; 2. the good polyacrylamide solution of dissolving should not be placed for a long time, the easy more degraded of rare more solution, can only with join with or used up the same day at the latest, working cost is higher, and may bring secondary pollution.
Summary of the invention
The invention provides a kind of polymer coagulant that is applied to sewage disposal, this polymer coagulant is solution state, and stable performance, but long-term storage and do not influence result of use are easy to use, can be used for sewage disposal, mud concentrates.
In order to achieve the above object, the invention provides a kind of polymer coagulant, this flocculation agent comprises:
Anion-polyacrylamide 5%～25%;
Cationic-type polyacrylamide 5%～25%;
Non-ionic polyacrylamide 5%～25%;
Dispersion agent 3%～15%;
Water 40%～60%.
Described flocculation agent is solution state, and the PH scope is 6.5～7.5, and stable performance can long-term storage, and is easy-to-use, need not to stir long-time the dispersion, can use at any time, and dosage can add as required, and convenient control consumption is saved cost.
Described dispersion agent can prevent that described polymer coagulant from solidifying once more, and this dispersion agent is selected from: the aqueous solution of sodium salt, sylvite or its mixture; Be preferably the aqueous solution of sodium salt, the wet concentration of described dissolving sodium salt is from the deionization pure water.
The used aqueous solvent of described polymer coagulant is the deionization pure water, to reduce the possibility of flocculation agent hydrolysis.
Polyacrylamide in the described flocculation agent is reticulated structure, in water suspended substance is had good trapping ability.
Generally speaking, anion-polyacrylamide is used more extensive, is suitable for the sedimentation of suspended substance in all kinds of water, improves dewatering performance of sludge, improves the pressure filter task performance.Cationic-type polyacrylamide is suitable for sanitary sewage and municipal wastewater is handled, and to improving sludge dewatering effect is arranged very, more helps the pressure mud operation of pressure filter.Non-ionic polyacrylamide can when sewage shows acidity, select non-ionic type more reasonable as the base mateiral of various modified polyacrylamides.
But no matter polyacrylamide is anionic, cationic or non-ionic type, all be easy to caking in the dissolved process, vigorous stirring for a long time is for avoiding influencing its performance, manipulation require is very careful, and after dissolving, again must with join with or used up the same day, otherwise easily degraded is gone bad and is solidified once more and can not re-use, complex operation when being used for water treatment, must join again at every turn, and can only join just amount, otherwise can cause waste.
And anionic, polyacrylamide cationic or non-ionic type respectively have its characteristic usually, emphasize particularly on different fields when disposing of sewage; Polymer coagulant of the present invention is the characteristic separately of the polyacrylamide of comprehensive anionic, cationic or non-ionic type, is useful in the sewage disposal of big pH value mobility scale; The beneficial effect of polymer coagulant of the present invention is:
1. because of comprising anionic, cationic and non-ionic polyacrylamide, almost can include the sewage disposal of all situations, can in big pH value mobility scale, use, and the polyacrylamide of different types all plays a role, the processing efficiency height, action effect is remarkable, the clarification of water degree height after the processing;
2. because of polymer coagulant of the present invention is solution state, stable performance can be configured to the very low solution of concentration and can not degrade, convenient control dosage, and do not need stir long-time the dispersion when using, can use easy-to-operate whenever and wherever possible; Also but prolonged preservation reduces running cost;
3. because of polymer coagulant of the present invention has special reticulated structure, it has good trapping ability to the suspended substance in the water.
Embodiment
Below in conjunction with embodiment technical scheme of the present invention is further described.
Embodiment 1
Count by weight, in 30 ℃ reactor, to dissolve in 40 parts in water under 25 parts of stirrings of anion-polyacrylamide, and add 15 parts of dispersion agent sodium bicarbonates gradually, stir, then, under agitation add 5 parts of non-ionic polyacrylamides successively, 5 parts of cationic-type polyacrylamides, after treating to dissolve fully, it is 6.5～7.5 that the aqueous hydrochloric acid of employing 10% is regulated pH value, stirs, gradually cool to room temperature, obtain colourless or summary yellowly clear solution, this clear solution is added 2～5ppm in sewage, can obviously improve effect of settling, and handle the chemical oxygen demand COD (ChemicalOxygen Demand) of back sewage, chromaticity index also has clear improvement.Test data is as shown in table 1 below.
The water treatment effect data of table 1: embodiment 1 gained polymer coagulant:
This polymer coagulant liquid storage muddiness also occurred in 12 months, solidifies, and signs of degradation also do not occur, and the degree of hydrolysis that its hydrolysis degree test is placed after preceding and the placement is constant substantially, all in 30%～33% scope.
Embodiment 2
Count by weight, in 50 ℃ reactor, with 5 parts of anion-polyacrylamides, dissolve in 45 parts in water under stirring, and add 10 parts in dispersion agent yellow soda ash gradually, stir, then, under agitation add 5 parts of non-ionic polyacrylamides successively, 25 parts of cationic-type polyacrylamides, after treating to dissolve fully, it is 6.5～7.5 that the aqueous hydrochloric acid of employing 10% is regulated pH value, stir, cool to room temperature obtains colourless or summary yellowly clear solution gradually, and this clear solution is added 2～5ppm in sewage, can obviously improve effect of settling, and handle the chemical oxygen demand COD (ChemicalOxygen Demand) of back sewage, chromaticity index also has clear improvement.Test data is as shown in table 2 below.
The water treatment effect data of table 2: embodiment 2 gained polymer coagulants:
This polymer coagulant liquid storage muddiness also occurred in 12 months, solidifies, and signs of degradation also do not occur, and the degree of hydrolysis that its hydrolysis degree test is placed after preceding and the placement is constant substantially, all in 30%～33% scope.
Embodiment 3
Count by weight, in 65 ℃ reactor, with 5 parts of anion-polyacrylamides, dissolve in 50 parts in water under stirring, and add 8 parts in dispersion agent sodium sulfate gradually, stir, then, under agitation add 25 parts of non-ionic polyacrylamides successively, 5 parts of cationic-type polyacrylamides, after treating to dissolve fully, it is 6.5～7.5 that the hydrochloric acid of employing 10% and 5% ammonia soln are regulated pH value, stir, cool to room temperature obtains colourless or summary yellowly clear solution gradually, and this clear solution is added 2～5ppm in sewage, can obviously improve effect of settling, and handle the chemical oxygen demand COD (ChemicalOxygen Demand) of back sewage, chromaticity index also has clear improvement.Test data is as shown in table 3 below.
The water treatment effect data of table 3: embodiment 3 gained polymer coagulants:
This polymer coagulant liquid storage muddiness also occurred in 12 months, solidifies, and signs of degradation also do not occur, and the degree of hydrolysis that its hydrolysis degree test is placed after preceding and the placement is constant substantially, all in 30%～33% scope.
Embodiment 4
Count by weight, in 80 ℃ isothermal reaction still, with 12 parts of anion-polyacrylamides, dissolve in 56 parts in water under stirring, and add 3 parts of dispersion agent sodium pyrosulfates gradually, stir, then, under agitation add 12 parts of non-ionic polyacrylamides successively, 12 parts of cationic-type polyacrylamides, after treating to dissolve fully, adopting ammonia soln to regulate pH value is 6.5～7.5, stir, cool to room temperature obtains colourless or summary yellowly clear solution gradually, and this clear solution is added 2～5ppm in sewage, can obviously improve effect of settling, and handle the chemical oxygen demand COD (Chemical OxygenDemand) of back sewage, chromaticity index also has clear improvement.Test data is as shown in table 4 below.
The water treatment effect data of table 4: embodiment 4 gained polymer coagulants:
This polymer coagulant liquid storage muddiness also occurred in 12 months, solidifies, and signs of degradation also do not occur, and the degree of hydrolysis that its hydrolysis degree test is placed after preceding and the placement is constant substantially, all in 30%～33% scope.
The polymer coagulant of the present invention's preparation has good flocculation ability, can reduce the suspended substance in the water very effectively; After it was used to dispose of sewage, the clarification of water degree was very high, and long-time placement of this polymer coagulant can not solidify yet, can hydrolytic spoilage, and consumption is few, has saved production cost widely, and step simplifies the operation; Polymer coagulant of the present invention can also use with other coagulating agent collocation, further improves treatment effect.
Although content of the present invention has been done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.After those skilled in the art have read foregoing, for multiple modification of the present invention with to substitute all will be conspicuous.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (6)
1. a polymer coagulant is characterized in that, this polymer coagulant comprises (by weight percentage):
Anion-polyacrylamide 5%～25%;
Cationic-type polyacrylamide 5%～25%;
Non-ionic polyacrylamide 5%～25%;
Dispersion agent 3%～15%;
Water 40%～60%;
Described dispersion agent is the aqueous solution of sodium salt or sylvite.
2. polymer coagulant as claimed in claim 1 is characterized in that, the pH value scope of described flocculation agent is 6.5～7.5.
3. polymer coagulant as claimed in claim 1 is characterized in that described flocculation agent is solution state.
4. polymer coagulant as claimed in claim 1 is characterized in that, described water is the deionization pure water.
5. polymer coagulant as claimed in claim 1 is characterized in that, the water of described dissolving sodium salt or sylvite is the deionization pure water.
6. polymer coagulant as claimed in claim 1 is characterized in that the polyacrylamide in the described flocculation agent is reticulated structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101993576A CN101700921B (en) | 2009-11-26 | 2009-11-26 | Polymer coagulant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101993576A CN101700921B (en) | 2009-11-26 | 2009-11-26 | Polymer coagulant |
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| Publication Number | Publication Date |
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| CN101700921A CN101700921A (en) | 2010-05-05 |
| CN101700921B true CN101700921B (en) | 2011-07-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009101993576A Expired - Fee Related CN101700921B (en) | 2009-11-26 | 2009-11-26 | Polymer coagulant |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101830548A (en) * | 2010-05-25 | 2010-09-15 | 武汉理工大学 | Paint mist coagulant |
| CN102557218B (en) * | 2011-12-19 | 2013-11-06 | 上海沃杉化工有限公司 | Composite flocculating agent containing various polyacrylamides and preparation method for composite flocculating agent |
| CN103086490A (en) * | 2013-03-08 | 2013-05-08 | 大庆腾辉石油工程技术服务有限公司 | Organic high-polymer coagulant aid |
| CN103482845A (en) * | 2013-08-17 | 2014-01-01 | 嘉善蓝天碧水宝化工有限公司 | Composite sludge concentration dehydration conditioner |
| CN104591522A (en) * | 2015-02-11 | 2015-05-06 | 浙江华章科技有限公司 | Sludge flocculation-concentration treatment technique |
| CN105585238A (en) * | 2016-03-01 | 2016-05-18 | 长沙锦佳环保科技有限公司 | Sludge treatment method |
| CN105601084A (en) * | 2016-03-01 | 2016-05-25 | 长沙锦佳环保科技有限公司 | Flocculating agent, flocculating agent preparing method and silt stirring method |
| CN108862513A (en) * | 2018-06-28 | 2018-11-23 | 广州东烁科技有限公司 | A kind of compound type purifying agent and its preparation process for sewage purification |
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- 2009-11-26 CN CN2009101993576A patent/CN101700921B/en not_active Expired - Fee Related
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