CN108409104A - A kind of New Type of Sludge Dewatering agent - Google Patents
A kind of New Type of Sludge Dewatering agent Download PDFInfo
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- CN108409104A CN108409104A CN201810357002.4A CN201810357002A CN108409104A CN 108409104 A CN108409104 A CN 108409104A CN 201810357002 A CN201810357002 A CN 201810357002A CN 108409104 A CN108409104 A CN 108409104A
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- parts
- new type
- sludge dewatering
- reaction
- dewatering agent
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
Abstract
The invention discloses a kind of New Type of Sludge Dewatering agent, load weighted dimethyl diallyl ammonium chloride and acrylamide are put into reaction kettle, deionized water is added into reaction kettle again, keep reactor temperature constant, it is passed through nitrogen deoxygenation, stirring, then initiator is added, after reaction starts, acrylamide aqueous solution is slowly added dropwise, after completion of dropwise addition, the reaction was continued, after reaction, absolute ethyl alcohol is added into reaction kettle, it is stood after stirring evenly, then it filters, remove filtrate, drying will be precipitated, obtain the copolymer of solid, then by copolymer and cationic polyacrylamide, aluminium salt, molysite, flocculation aid is uniformly mixed, obtain the New Type of Sludge Dewatering agent.Advantageous effect is：The components such as organic and inorganic flocculant and flocculation aid are prepared into composite sludge dehydration agent, there is higher dewatering performance of sludge, less added amount of chemical, applied widely, toxicity is low, environmentally friendly.
Description
Technical field
The present invention relates to sludge dewatering fields, more particularly to a kind of New Type of Sludge Dewatering agent.
Background technology
Sludge is the accessory substance of sewage disposal, is that one kind is made of organic debris, microorganism, inorganic particle, colloid etc.
Extremely complex heterogeneous body, its key property is high-moisture percentage, and high content of organics, particle is thin, jelly liquid, difficult
To be separated by solid-liquid separation, so most of sewage treatment plants carry out a degree of solid-liquid using sludge dewatering equipment or sludge centrifuge
It detaches, there are four types of forms for the moisture in sludge：Surface adsorption water, Interstitial Water, capillary combination water and internal junction Heshui, above four kinds
Moisture can be divided into two kinds on the whole：Free water and combine water, be tightly combined in conjunction between water and solid particle, mobility compared with
It is low, need mechanical force or chemical reaction that could remove, and Free water can not passed through concentration or mechanical dehydration by solid particle constraint
It is separated from sludge, sludge can be divided into three categories by the type of handled water：Waterworks sludge, sewage plant sludge, industry
Sludge, the spies such as that there are mud granules is small for sludge, settling property is poor, moisture content is high, the content of organic matter is high, heavy metal and pathogenic bacteria are more
Point, currently, common sludge disposal method mainly has land use, compost treatment, sanitary landfills, sludge incineration, ocean dumping
Deng.
It in Treatment of Sludge link, needs to be carried out dehydrating, should need to add Assistant in the process, current is de-
Water medicament mainly has inorganic flocculating agent, organic flocculant, microbial flocculant, composite flocculation agent and flocculation aid etc., still, tradition
The dosage of inorganic flocculating agent is larger, and flocculating effect is bad, and organic flocculant has certain bio-toxicity, biological degradability difference etc.
Disadvantage, and if flocculation aid when being used alone dosage it is excessive, and the problems such as be easy to cause mud cake increase-volume, although biological flocculant
Dehydrating effect is preferable, but since some disadvantages of itself limit its practical ranges.
Invention content
The purpose of the present invention is that solve the above-mentioned problems and provides a kind of New Type of Sludge Dewatering agent.
The present invention is achieved through the following technical solutions above-mentioned purpose：
A kind of New Type of Sludge Dewatering agent, in parts by weight, weigh respectively 15-45 parts dimethyl diallyl ammonium chloride and
10-30 parts of acrylamide, is put into reaction kettle, then 50-150 parts of deionized water is added into reaction kettle, control reaction
Temperature in the kettle is kept constant, and is then passed through nitrogen and is carried out deoxygenation, start to stir, 1-10 parts of initiators are then added, reaction starts
Afterwards, 30-60 parts of acrylamide aqueous solutions are slowly added dropwise into reaction kettle, after completion of dropwise addition, the reaction was continued 6-15h, reaction terminates
Afterwards, absolute ethyl alcohol is added into reaction kettle for 1: 0.5-3 according to the volume ratio of fluid product in reaction kettle and absolute ethyl alcohol, stirs
Uniformly, then stopping stirring, stands a period of time, then filters, and removes filtrate, and precipitation is put into drying in drying device, is obtained
To the dimethyl diallyl ammonium chloride of solid and the copolymer of acrylamide, then by dimethyl diallyl ammonium chloride and third
The copolymer of acrylamide and 2-10 parts of cationic polyacrylamide, 5-15 parts of aluminium salt, 5-10 parts of molysite, 10-20 parts
Flocculation aid is uniformly mixed, and obtains the New Type of Sludge Dewatering agent.
Reactor temperature is 25-45 DEG C, is passed through a length of 10-60min when nitrogen, stir speed (S.S.) 100-600r/min.
The initiator be potassium peroxydisulfate, sodium peroxydisulfate, ammonium persulfate, sodium hydrogensulfite it is one or more.
The acrylamide aqueous solution mass fraction is 40-80%, when standing a length of 0.5-3h, the drying device is true
Vacuum freecing-dry machine.
The aluminium salt be aluminum sulfate, alum, alchlor it is one or more.
The aluminium salt be ferric trichloride, green vitriol, ferric sulfate it is one or more.
The flocculation aid is the one or two of quick lime, flyash.
The present invention the mechanism of action be：
After the copolymer and cationic polyacrylamide of dimethyl diallyl ammonium chloride and acrylamide ionize in water
Be launched into long chain, the charge of institute's band, which can play, on molecule neutralizes the electrically charged effect of mud granule, make mud granule with
Hydrone detaches and compression double electric layer, in addition, long chain can also form adsorption bridging with mud granule, net catches sludge
Grain makes original small mud granule be collected as larger particle, and flocculation sludge improves the settling property of sludge, aluminium salt and iron
Salt dissolves in water becomes positively charged ion, can play and neutralize negatively charged mud granule and compression double electric layer
Effect, so that mud granule is detached with hydrone, flocculation improves sedimentation function at bulky grain sludge, and then improves the de- of sludge
Aqueous energy, flocculation aid, which can be used as skeleton, makes sludge flco form persistently firm structure, keeps porosity in dehydration, prevents wadding
Body collapses.
Advantageous effect is：The components such as organic flocculant, inorganic flocculating agent and flocculation aid are prepared into composite sludge dehydration
Agent, the shortcomings that capable of making up single flocculant, have higher dewatering performance of sludge, less added amount of chemical, the scope of application
Extensively, toxicity is low, environmentally friendly.
Specific implementation mode
Principles and features of the present invention are described below in conjunction with specific example, example is served only for explaining this hair
It is bright, it is not intended to limit the scope of the present invention, unless otherwise specified, conventional prior completion is all made of in following embodiments.
Embodiment one
A kind of New Type of Sludge Dewatering agent weighs 20 parts of dimethyl diallyl ammonium chloride and 10 respectively in parts by weight
The acrylamide of part, is put into reaction kettle, then 50 parts of deionized water is added into reaction kettle, and control reactor temperature is protected
Hold 45 DEG C it is constant, be then passed through nitrogen 20min, carry out deoxygenation, start to stir with the stir speed (S.S.) of 200r/min, be then added 2
After reaction starts, the acrylamide aqueous solution that 30 parts of mass fractions are 55% is slowly added dropwise into reaction kettle, is added dropwise for part initiator
After, the reaction was continued 8h is after reaction 1: 1 to anti-according to the volume ratio of fluid product in reaction kettle and absolute ethyl alcohol
It answers and absolute ethyl alcohol is added in kettle, stir evenly, then stop stirring, stand 0.5h, then filter, remove filtrate, precipitation is put
Enter drying in vacuum freeze drier, obtains the dimethyl diallyl ammonium chloride of solid and the copolymer of acrylamide, then
By the copolymer and 3 parts of cationic polyacrylamide of dimethyl diallyl ammonium chloride and acrylamide, 10 parts of aluminium salt, 5
The molysite, 15 parts of flocculation aid of part are uniformly mixed, and obtain the New Type of Sludge Dewatering agent.
The initiator is potassium peroxydisulfate, sodium peroxydisulfate, ammonium persulfate, mass ratio 3: 2: 1.
The aluminium salt is aluminum sulfate, alum, alchlor, mass ratio 1: 2: 1.
The aluminium salt is ferric trichloride, green vitriol, ferric sulfate, mass ratio 2: 0.5: 3.
The flocculation aid is quick lime, flyash, mass ratio 1: 1.5.
Embodiment two
A kind of New Type of Sludge Dewatering agent weighs 15 parts of dimethyl diallyl ammonium chloride and 20 respectively in parts by weight
The acrylamide of part, is put into reaction kettle, then 60 parts of deionized water is added into reaction kettle, and control reactor temperature is protected
Hold 40 DEG C it is constant, be then passed through nitrogen 30min, carry out deoxygenation, start to stir with the stir speed (S.S.) of 300r/min, be then added 5
After reaction starts, the acrylamide aqueous solution that 45 parts of mass fractions are 40% is slowly added dropwise into reaction kettle, is added dropwise for part initiator
After, the reaction was continued 12h is after reaction 1: 3 to anti-according to the volume ratio of fluid product in reaction kettle and absolute ethyl alcohol
It answers and absolute ethyl alcohol is added in kettle, stir evenly, then stop stirring, stand 2h, then filter, remove filtrate, precipitation is put into
It is dry in vacuum freeze drier, the dimethyl diallyl ammonium chloride of solid and the copolymer of acrylamide are obtained, then will
The copolymer and 5 parts of cationic polyacrylamide of dimethyl diallyl ammonium chloride and acrylamide, 12 parts of aluminium salt, 10 parts
Molysite, 18 parts of flocculation aid be uniformly mixed, obtain the New Type of Sludge Dewatering agent.
The initiator is potassium peroxydisulfate, sodium hydrogensulfite, mass ratio 1: 0.7.
The aluminium salt is aluminum sulfate, alum, mass ratio 3: 1.
The aluminium salt is green vitriol, ferric sulfate, mass ratio 1: 1.
The flocculation aid is quick lime.
Embodiment three
A kind of New Type of Sludge Dewatering agent weighs 35 parts of dimethyl diallyl ammonium chloride and 15 respectively in parts by weight
The acrylamide of part, is put into reaction kettle, then 80 parts of deionized water is added into reaction kettle, and control reactor temperature is protected
Hold 25 DEG C it is constant, be then passed through nitrogen 10min, carry out deoxygenation, start to stir with the stir speed (S.S.) of 100r/min, be then added 6
After reaction starts, the acrylamide aqueous solution that 60 parts of mass fractions are 45% is slowly added dropwise into reaction kettle, is added dropwise for part initiator
After, the reaction was continued 6h, after reaction, according to the volume ratio of fluid product in reaction kettle and absolute ethyl alcohol be 1: 2.5 to
Absolute ethyl alcohol is added in reaction kettle, stirs evenly, then stops stirring, stands 1h, then filters, removes filtrate, precipitation is put
Enter drying in vacuum freeze drier, obtains the dimethyl diallyl ammonium chloride of solid and the copolymer of acrylamide, then
By the copolymer and 10 parts of cationic polyacrylamide of dimethyl diallyl ammonium chloride and acrylamide, 8 parts of aluminium salt, 7
The molysite, 10 parts of flocculation aid of part are uniformly mixed, and obtain the New Type of Sludge Dewatering agent.
The initiator is ammonium persulfate, sodium hydrogensulfite, mass ratio 3: 1.
The aluminium salt is aluminum sulfate.
The aluminium salt is ferric trichloride, green vitriol, mass ratio 4: 1.
The flocculation aid is flyash.
Example IV
A kind of New Type of Sludge Dewatering agent weighs 40 parts of dimethyl diallyl ammonium chloride and 30 respectively in parts by weight
The acrylamide of part, is put into reaction kettle, then 100 parts of deionized water is added into reaction kettle, controls reactor temperature
35 DEG C of holding is constant, is then passed through nitrogen 40min, carries out deoxygenation, starts to stir with the stir speed (S.S.) of 500r/min, then be added
10 parts of initiators after reaction starts, the acrylamide aqueous solution that 40 parts of mass fractions are 70% are slowly added dropwise into reaction kettle, drop
After adding, the reaction was continued 10h, after reaction, according to the volume ratio of fluid product in reaction kettle and absolute ethyl alcohol be 1: 2 to
Absolute ethyl alcohol is added in reaction kettle, stirs evenly, then stops stirring, stands 3h, then filters, removes filtrate, precipitation is put
Enter drying in vacuum freeze drier, obtains the dimethyl diallyl ammonium chloride of solid and the copolymer of acrylamide, then
By the copolymer and 2 parts of cationic polyacrylamide of dimethyl diallyl ammonium chloride and acrylamide, 5 parts of aluminium salt, 9 parts
Molysite, 20 parts of flocculation aid be uniformly mixed, obtain the New Type of Sludge Dewatering agent.
The initiator is sodium peroxydisulfate, sodium hydrogensulfite, mass ratio 1: 5.
The aluminium salt is alchlor.
The aluminium salt is green vitriol.
The flocculation aid is quick lime, flyash, mass ratio 1: 0.8.
Embodiment five
A kind of New Type of Sludge Dewatering agent weighs 30 parts of dimethyl diallyl ammonium chloride and 20 respectively in parts by weight
The acrylamide of part, is put into reaction kettle, then 120 parts of deionized water is added into reaction kettle, controls reactor temperature
30 DEG C of holding is constant, is then passed through nitrogen 60min, carries out deoxygenation, starts to stir with the stir speed (S.S.) of 600r/min, then be added
8 parts of initiators after reaction starts, the acrylamide aqueous solution that 50 parts of mass fractions are 75% are slowly added dropwise into reaction kettle, drop
After adding, the reaction was continued, and 14h is after reaction 1: 0.5 according to the volume ratio of fluid product in reaction kettle and absolute ethyl alcohol
Absolute ethyl alcohol is added into reaction kettle, stirs evenly, then stops stirring, stands 2.5h, then filters, removes filtrate, will sink
Shallow lake is put into drying in vacuum freeze drier, obtains the dimethyl diallyl ammonium chloride of solid and the copolymer of acrylamide,
Then by the copolymer and 8 parts of cationic polyacrylamide of dimethyl diallyl ammonium chloride and acrylamide, 15 parts of aluminium
Salt, 8 parts of molysite, 12 parts of flocculation aid are uniformly mixed, and obtain the New Type of Sludge Dewatering agent.
The initiator is sodium peroxydisulfate.
The aluminium salt is aluminum sulfate, alum, alchlor, mass ratio 0.3: 0.7: 1.
The aluminium salt is ferric trichloride, green vitriol, ferric sulfate, mass ratio 2: 0.5: 1.
The flocculation aid is quick lime, flyash, mass ratio 4: 1.
The basic principles, main features and advantages of the invention have been shown and described above.The technical staff of the industry should
Understand, the present invention is not limited to the above embodiments, and the above embodiments and description only describe the originals of the present invention
Reason, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes and improvements
It all fall within the protetion scope of the claimed invention.
Claims (7)
1. a kind of New Type of Sludge Dewatering agent, which is characterized in that in parts by weight, weigh 15-45 parts of two allyl of dimethyl respectively
Ammonium chloride and 10-30 parts of acrylamide, are put into reaction kettle, then 50-150 parts of deionization is added into reaction kettle
Water, control reactor temperature are kept constant, and are then passed through nitrogen and are carried out deoxygenation, start to stir, and 1-10 parts of initiations are then added
30-60 parts of acrylamide aqueous solutions are slowly added dropwise into reaction kettle after reaction starts for agent, after completion of dropwise addition, the reaction was continued 6-
15h is after reaction 1: 0.5-3 to be added into reaction kettle according to the volume ratio of fluid product in reaction kettle and absolute ethyl alcohol
Absolute ethyl alcohol stirs evenly, and then stops stirring, stands a period of time, then filters, and removes filtrate, precipitation is put into drying
It is dry in device, the dimethyl diallyl ammonium chloride of solid and the copolymer of acrylamide are obtained, then by dimethyl diene
The copolymer of propyl ammonium chloride and acrylamide and 2-10 parts of cationic polyacrylamide, 5-15 parts of aluminium salt, 5-10 parts
Molysite, 10-20 parts of flocculation aid is uniformly mixed, and obtains the New Type of Sludge Dewatering agent.
2. a kind of New Type of Sludge Dewatering agent according to claim 1, which is characterized in that reactor temperature is 25-45 DEG C,
It is passed through a length of 10-60min when nitrogen, stir speed (S.S.) 100-600r/min.
3. a kind of New Type of Sludge Dewatering agent according to claim 1, which is characterized in that the initiator be potassium peroxydisulfate,
Sodium peroxydisulfate, ammonium persulfate, sodium hydrogensulfite it is one or more.
4. a kind of New Type of Sludge Dewatering agent according to claim 1, which is characterized in that the acrylamide aqueous solution quality
Score is 40-80%, when standing a length of 0.5-3h, the drying device is vacuum freeze drier.
5. a kind of New Type of Sludge Dewatering agent according to claim 1, which is characterized in that the aluminium salt be aluminum sulfate, alum,
Alchlor it is one or more.
6. a kind of New Type of Sludge Dewatering agent according to claim 1, it is characterised in that：The aluminium salt is ferric trichloride, green
Alum, ferric sulfate it is one or more.
7. a kind of New Type of Sludge Dewatering agent according to claim 1, it is characterised in that：The flocculation aid is quick lime, powder
The one or two of coal ash.
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| CN201810357002.4A CN108409104A (en) | 2018-04-20 | 2018-04-20 | A kind of New Type of Sludge Dewatering agent |
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| CN201810357002.4A CN108409104A (en) | 2018-04-20 | 2018-04-20 | A kind of New Type of Sludge Dewatering agent |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110498584A (en) * | 2019-07-31 | 2019-11-26 | 中施柯朗（天津）污泥治理处理工程股份有限公司 | A kind of municipal sludge fermentation assistant |
| CN110818212A (en) * | 2019-12-02 | 2020-02-21 | 河北蓝江生物环保科技有限公司 | Efficient sludge drying agent for drying sludge and use method thereof |
| CN111116011A (en) * | 2019-12-27 | 2020-05-08 | 深圳粤鹏环保技术股份有限公司 | Composite sludge conditioner for treating glass polishing sludge and application thereof |
| CN113860701A (en) * | 2021-11-11 | 2021-12-31 | 新疆水处理工程技术研究中心有限公司 | Sludge dehydrating agent and preparation method thereof |
| CN114436500A (en) * | 2022-01-27 | 2022-05-06 | 爱环吴世（苏州）环保股份有限公司 | Functional composite flocculant for sludge and preparation method thereof |
| CN115028343A (en) * | 2022-07-12 | 2022-09-09 | 南京江北新区公用控股集团有限公司 | Compound sludge conditioner, preparation method and application thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4673511A (en) * | 1985-09-30 | 1987-06-16 | Nalco Chemical Company | Acrylamide diallyl dimethyl ammonium chloride copolymers as improved dewatering acids for mineral processing |
| CN102674657A (en) * | 2012-06-11 | 2012-09-19 | 安徽国祯环保节能科技股份有限公司 | Sludge dewatering method for urban sewage plant |
| CN106746482A (en) * | 2017-01-19 | 2017-05-31 | 安徽省通源环境节能股份有限公司 | The compound conditioner of sludge dewatering and mud dewatering method |
| CN107162383A (en) * | 2017-05-09 | 2017-09-15 | 同济大学 | A kind of efficiently low chlorine conditioner and its application in high solid digested sludge dehydration |
-
2018
- 2018-04-20 CN CN201810357002.4A patent/CN108409104A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4673511A (en) * | 1985-09-30 | 1987-06-16 | Nalco Chemical Company | Acrylamide diallyl dimethyl ammonium chloride copolymers as improved dewatering acids for mineral processing |
| CN102674657A (en) * | 2012-06-11 | 2012-09-19 | 安徽国祯环保节能科技股份有限公司 | Sludge dewatering method for urban sewage plant |
| CN106746482A (en) * | 2017-01-19 | 2017-05-31 | 安徽省通源环境节能股份有限公司 | The compound conditioner of sludge dewatering and mud dewatering method |
| CN107162383A (en) * | 2017-05-09 | 2017-09-15 | 同济大学 | A kind of efficiently low chlorine conditioner and its application in high solid digested sludge dehydration |
Non-Patent Citations (1)
| Title |
|---|
| 常青: "DMDAAC-AM共聚物的制备及其水处理絮凝效能研究", 《环境科学学报》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110498584A (en) * | 2019-07-31 | 2019-11-26 | 中施柯朗（天津）污泥治理处理工程股份有限公司 | A kind of municipal sludge fermentation assistant |
| CN110818212A (en) * | 2019-12-02 | 2020-02-21 | 河北蓝江生物环保科技有限公司 | Efficient sludge drying agent for drying sludge and use method thereof |
| CN111116011A (en) * | 2019-12-27 | 2020-05-08 | 深圳粤鹏环保技术股份有限公司 | Composite sludge conditioner for treating glass polishing sludge and application thereof |
| CN113860701A (en) * | 2021-11-11 | 2021-12-31 | 新疆水处理工程技术研究中心有限公司 | Sludge dehydrating agent and preparation method thereof |
| CN114436500A (en) * | 2022-01-27 | 2022-05-06 | 爱环吴世（苏州）环保股份有限公司 | Functional composite flocculant for sludge and preparation method thereof |
| CN115028343A (en) * | 2022-07-12 | 2022-09-09 | 南京江北新区公用控股集团有限公司 | Compound sludge conditioner, preparation method and application thereof |
| CN115028343B (en) * | 2022-07-12 | 2024-04-12 | 南京江北新区公用控股集团有限公司 | Compound sludge conditioner, preparation method and application thereof |
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Application publication date: 20180817 |