CN112811774A - Sludge compound conditioning and deep dehydration medicament and method - Google Patents
Sludge compound conditioning and deep dehydration medicament and method Download PDFInfo
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- CN112811774A CN112811774A CN202011588537.6A CN202011588537A CN112811774A CN 112811774 A CN112811774 A CN 112811774A CN 202011588537 A CN202011588537 A CN 202011588537A CN 112811774 A CN112811774 A CN 112811774A
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- sludge
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- ammonium salt
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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
- C02F11/148—Combined use of inorganic and organic substances, being added in the same treatment step
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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
- C02F11/004—Sludge detoxification
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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
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
Abstract
The invention provides a sludge composite conditioning and deep dehydration medicament and a method, which comprises a polymeric quaternary ammonium salt and a conditioning additive which are used as wall-breaking conditioners, wherein the wall-breaking conditioners account for 1.0-8.0% of the dry weight of the sludge, and the conditioning additive accounts for 1.0-15.0% of the dry weight of the sludge; the conditioning auxiliary agent is one or more of sludge incineration ash, quicklime, calcium peroxide, calcium hydroxide and sodium hydroxide. The agent provided by the invention utilizes the characteristics of different quaternary ammonium salts, adopts a method of compounding different quaternary ammonium salts, utilizes the wall-breaking conditioning synergistic effect of different quaternary ammonium salts, utilizes the characteristic that the main chain of the cationic polyquaternium has more cationic groups, has higher relative molecular mass and large extensibility, has good flocculation effect, and simultaneously realizes efficient wall-breaking conditioning and flocculation sedimentation on sludge; then the deep dehydration of the sludge is realized with the help of a dehydration channel provided by the conditioning auxiliary agent.
Description
Technical Field
The invention belongs to the technical field of environmental engineering, and particularly relates to a sludge compound conditioning and deep dehydration medicament and a method.
Background
The sludge has the characteristic of high water content, and the dehydration reduction of the sludge is the key for ensuring the subsequent treatment. The volume of the dewatered sludge is greatly reduced, and the corresponding storage, transportation and treatment costs are also greatly reduced. However, since the substances in the microbial cells and the Extracellular Polymers (EPS) on the surface of the sludge have high hydrophilicity, deep dehydration of the sludge is difficult to achieve by using general dehydration methods such as sludge concentration, centrifugation, belt filter pressing and the like. The deep dehydration of the sludge can be realized by natural drying dehydration and heat drying, but the natural drying dehydration takes too long time and the heat drying energy consumption is too high.
At present, deep dehydration of sludge can be realized by adding conditioning agents and combining plate-and-frame mechanical dehydration equipment. Generally, conditioning agents such as calcium oxide, potassium ferrate and the like are added into sludge, wall breaking treatment is carried out on the sludge to release bound water in cells, flocculating agents such as ferric salt, aluminum salt, polyacrylamide and the like are added to carry out flocculating treatment on the sludge, filter aids such as calcium silicate and the like are added, the sludge after composite conditioning is pumped into a plate-and-frame filter press to realize deep dehydration. However, the use of a large amount of inorganic agents increases the content of inorganic solids in the dewatered sludge cake, increases the sludge treatment load, and simultaneously reduces the heat value and increases the alkalinity of the sludge, which is not beneficial to the selection of further treatment processes such as subsequent incineration, compost and the like. The use of ferric salt flocculant is also easy to corrode sludge dewatering equipment.
In order to reduce the use of inorganic sludge conditioning agents, in the prior art, for example, in the technical scheme disclosed in the Chinese invention patent CN200810198539.7, a quaternary ammonium salt cationic surfactant is used as a conditioning agent, polyaluminium chloride is used as a flocculating agent, a culture medium obtained after edible mushrooms are picked is used as an auxiliary agent, and the water content of sludge can be reduced to below 60% after membrane extrusion. And as the Chinese patent CN201010580468.4 in the prior art, on the basis of using quaternary ammonium salt for conditioning, assistants and flocculants such as polyaluminium sulfate, quick lime, bamboo charcoal, polyacrylamide and the like are sequentially added into the sludge in advance, so that deep dehydration of the sludge cake with the water content of below 50% is realized. The invention patent CN201310016780.4 uses quaternary ammonium salt cationic surfactant, uses polyferric and polyacrylamide as flocculant, and realizes deep dehydration of sludge with dehydration rate of 50-60% without addition of auxiliary agent. According to the invention patent CN201310004357.2, on the basis of using quaternary ammonium salt cation organic compound for conditioning and using iron salt and/or aluminum salt as a flocculating agent, the water content of sludge is reduced to 40% -45% by adding calcium silicate salt and calcium aluminate salt dehydration auxiliary agents. The Chinese patent CN201610092549.7 is to use potassium ferrate to pre-oxidize the sludge before using polyquaternium and polyaluminium salt to condition the sludge, and to make the water content of the mud cake reach 50-58%. According to the analysis of the patent technical scheme disclosed in the prior art, the use of the single quaternary ammonium salt often requires the addition of flocculating agents such as iron/aluminum/polyacrylamide and the like, and even requires the addition of a pre-oxidant and a conditioning aid to exert the dehydration conditioning effect of the quaternary ammonium salt. The source of the dehydration aids and the cost of the pre-oxidizer often limit the practical application of these techniques. Therefore, a sludge composite conditioning and deep dehydration medicament and a method for a wall-breaking conditioner which is easy to obtain in industrial production and is obtained by compounding one or more quaternary ammonium salts by using industrial production wastes as conditioning aids are urgently needed.
Disclosure of Invention
Aiming at the defects, the invention provides a sludge composite conditioning and deep dewatering agent and a method, the agent provided by the invention utilizes the characteristics of different quaternary ammonium salts, adopts a method of compounding different quaternary ammonium salts, utilizes the wall breaking conditioning synergistic effect of different quaternary ammonium salts, simultaneously utilizes the characteristics that the main chain of the cationic polyquaternium has more cationic groups, has higher relative molecular mass and large extensibility and has good flocculation effect, and simultaneously realizes the high-efficiency wall breaking conditioning and flocculation sedimentation of the sludge; then the deep dehydration of the sludge is realized with the help of a dehydration channel provided by the conditioning auxiliary agent.
The invention provides the following technical scheme: a sludge composite conditioning and deep dehydration medicament comprises a polymeric quaternary ammonium salt serving as a wall-breaking conditioner and a conditioning aid, wherein the wall-breaking conditioner accounts for 1.0-8.0% of the dry weight of sludge, and the conditioning aid accounts for 1.0-15.0% of the dry weight of sludge.
Further, the polymeric quaternary ammonium salt used as the wall-breaking conditioner is a cationic polymeric quaternary ammonium salt compound agent.
Further, the cationic polyquaternium compound agent is selected from polyquaternium, single-chain quaternary ammonium salt and double-chain quaternary ammonium salt.
Further, the cationic polyquaternium compound medicament is a compound of polyquaternium, single-chain quaternary ammonium salt and double-chain quaternary ammonium salt in a mass ratio of 1: 0.1-1.
Further, the polyquaternary ammonium salt is an N, N-dimethyl-N-2-propenyl-2-propylene ammonium chloride/acrylamide graft copolymer, the single-chain quaternary ammonium salt is dodecyl dimethyl benzyl ammonium chloride, and the double-chain quaternary ammonium salt is didecyl dimethyl ammonium chloride.
Further, the conditioning auxiliary agent is one or more of sludge incineration ash, quicklime, calcium peroxide, calcium hydroxide and sodium hydroxide.
Further, the conditioning auxiliary agent comprises incineration ash and quicklime in a mass ratio of 1: 0.1-0.9.
Further, the sludge subjected to compound conditioning and deep dehydration is sludge of a municipal sewage treatment plant.
The invention also provides a method for performing composite conditioning and deep dehydration on sludge by adopting the medicament, which comprises the following steps:
1) pumping sludge into a conditioning tank, and adjusting the water content of the sludge to 95% -98%;
2) adding a wall breaking conditioner accounting for 1.0-8.0% of the dry weight of the sludge into the sludge pretreated in the step 1), and stirring for 10-20 min at a stirring strength of 80-120 r/min;
3) adding a conditioning auxiliary agent accounting for 1.0-15.0% of the dry weight of the sludge into the sludge obtained after the treatment in the step 2), and stirring for 5min at the stirring strength of 300-350 r/min;
4) pumping the sludge conditioned in the step 3) into a mechanical filter pressing dehydration device for dehydration to finish the composite conditioning and deep dehydration of the sludge.
Further, the water content of the treated sludge is reduced to 56.5% -63.8%.
The invention has the beneficial effects that:
1. according to the invention, three polyquaternary ammonium salts, namely single-chain quaternary ammonium salt, double-chain quaternary ammonium salt and polyquaternary ammonium salt, are compounded to serve as a wall-breaking conditioner of a sludge composite conditioning and deep dehydration medicament, and industrial production wastes such as sludge incineration ash and the like are used as conditioning aids, so that strong antibacterial synergistic cooperativity among different quaternary ammonium salts is fully utilized, the efficient wall breaking of microbial cells in sludge is realized, and the use of an inorganic conditioning medicament is avoided; secondly, the characteristics that the main chain of the polymeric quaternary ammonium salt is provided with more cationic groups, the relative molecular weight is higher, and the flocculation effect is strong are utilized, so that the use of other inorganic flocculants such as aluminum/iron and the like is avoided; meanwhile, industrial production wastes such as sludge incineration ash and the like are used as conditioning aids, a sludge dehydration channel is provided, the sludge dehydration permeability is improved, the dehydration efficiency is improved, and the reuse of the wastes is realized.
2. The invention provides a polyquaternium compound medicament used in a sludge compound conditioning and deep dehydration medicament, which comprises the following components in part by weight: single chain quaternary ammonium salts, double chain quaternary ammonium salts, and polymeric quaternary ammonium salts. The single-chain quaternary ammonium salt can kill some bacteria propagules and grease clearing virus. The double-chain quaternary ammonium salt can effectively kill various microorganisms, and the two carbon chains can generate attraction and permeability far exceeding those of common disinfectant molecules, can enter microbial cells to denature protein, and further inhibit energy metabolism of cells by interfering the activity of biological enzymes in the cells to inhibit the synthesis of nucleic acid of the cells, so that the microorganisms die. The quaternary ammonium salt with larger molecules influences the metabolism of bacteria by highly gathering on the surface of the bacteria, changes the permeability of cell walls, and causes excessive water to enter and burst cells. The different quaternary ammonium salts have strong synergistic effect. In addition, the main chain of the polymeric quaternary ammonium salt is provided with more cationic groups, the relative molecular weight is higher, the extensibility is large, and organic substances released by cell rupture can be quickly captured, effectively neutralized electrically, destabilized and flocculated and settled, thereby playing the role of a flocculating agent.
Detailed description of the preferred embodiments
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The composite sludge conditioning and deep dewatering agent provided by the embodiment comprises a polymeric quaternary ammonium salt and a conditioning aid which are used as wall-breaking conditioners, wherein the wall-breaking conditioners account for 1.0% of the dry weight of sludge, the conditioning aid accounts for 1.0% of the dry weight of sludge, the polymeric quaternary ammonium salt is a cationic polymeric quaternary ammonium salt compounded by a polyquaternary ammonium salt, a single-chain quaternary ammonium salt and a double-chain quaternary ammonium salt according to the mass ratio of 1:0.1:0.1, and the conditioning aid is compounded by sludge incineration ash and quick lime according to the mass ratio of 1: 0.1.
In the cationic polyquaternary ammonium salt compound medicament, polyquaternary ammonium salt is a copolymer of N, N-dimethyl-N-2-propenyl-2-propylene ammonium chloride and acrylamide, single-chain quaternary ammonium salt is dodecyl dimethyl benzyl ammonium chloride, and double-chain quaternary ammonium salt is didecyl dimethyl ammonium chloride.
The embodiment also provides a method for performing composite conditioning and deep dehydration on sludge by adopting the medicament, which comprises the following steps:
1) pumping the sludge into a conditioning tank, and adjusting the water content of the sludge to 97.5%;
2) adding a wall breaking conditioner accounting for 1.0 percent of the dry weight of the sludge into the sludge pretreated in the step 1), and stirring for 10min at a stirring strength of 80 r/min;
3) adding a conditioning auxiliary agent accounting for 1.0 percent of the dry weight of the sludge into the sludge obtained after the treatment in the step 2), and stirring for 5min at the stirring strength of 300 r/min;
4) pumping the sludge conditioned in the step 3) into a mechanical filter pressing dehydration device for dehydration, and reducing the water content of the dewatered sludge to 63.8 percent to finish the composite conditioning and deep dehydration of the sludge.
Example 2
The composite sludge conditioning and deep dewatering agent provided by the embodiment comprises a polymeric quaternary ammonium salt and a conditioning aid which are used as wall-breaking conditioners, wherein the wall-breaking conditioners account for 1.0% of the dry weight of sludge, the conditioning aid accounts for 1.0% of the dry weight of sludge, the polymeric quaternary ammonium salt is cationic polymeric quaternary ammonium salt compounded by polyquaternary ammonium salt, single-chain quaternary ammonium salt and double-chain quaternary ammonium salt according to the mass ratio of 1:0.1:1, and the conditioning aid is compounded by sludge incineration ash and quick lime according to the mass ratio of 1: 0.5.
In the cationic polyquaternary ammonium salt compound medicament, polyquaternary ammonium salt is a copolymer of N, N-dimethyl-N-2-propenyl-2-propylene ammonium chloride and acrylamide, single-chain quaternary ammonium salt is dodecyl dimethyl benzyl ammonium chloride, and double-chain quaternary ammonium salt is didecyl dimethyl ammonium chloride.
The embodiment also provides a method for performing composite conditioning and deep dehydration on sludge by adopting the medicament, which comprises the following steps:
1) pumping the sludge into a conditioning tank, and adjusting the water content of the sludge to 96.8%;
2) adding a wall-breaking conditioner accounting for 1.0 percent of the dry weight of the sludge into the sludge pretreated in the step 1), and stirring for 15min at the stirring intensity of 100 r/min;
3) adding a conditioning auxiliary agent accounting for 1.0 percent of the dry weight of the sludge into the sludge obtained after the treatment in the step 2), and stirring for 5min at the stirring strength of 325 r/min;
4) pumping the sludge conditioned in the step 3) into a mechanical filter pressing dehydration device for dehydration, and reducing the water content of the dehydrated sludge to 62.2 percent to finish the composite conditioning and deep dehydration of the sludge.
Example 3
The wall breaking conditioning agent and conditioning aid in this example were the same as in example 2.
The sludge is conditioned and dehydrated according to the following steps:
1) pumping the sludge into a conditioning tank, and adjusting the water content of the sludge to 97.8%;
2) adding a wall-breaking conditioner accounting for 6% of the dry weight of the sludge into the sludge obtained after pretreatment in the step 1), and stirring for 15min at a stirring strength of 100 r/min;
3) adding conditioning auxiliary agent accounting for 8% of the dry weight of the sludge into the sludge obtained after the treatment in the step 2), and stirring for 5min at the stirring strength of 325 r/min;
4) pumping the sludge conditioned in the step 3) into a mechanical filter pressing dehydration device for dehydration to complete the composite conditioning and deep dehydration of the sludge.
And detection shows that the water content of the sludge is reduced to 57.1% after dehydration.
Example 4
The composite sludge conditioning and deep dewatering agent provided by the embodiment comprises a polymeric quaternary ammonium salt and a conditioning aid which are used as wall-breaking conditioners, wherein the wall-breaking conditioners account for 8.0% of the dry weight of sludge, and the conditioning aid accounts for 15.0% of the dry weight of sludge, the polymeric quaternary ammonium salt is cationic polymeric quaternary ammonium salt compounded by polyquaternary ammonium salt, single-chain quaternary ammonium salt and double-chain quaternary ammonium salt according to the mass ratio of 1:0.9:0.1, and the conditioning aid is compounded by sludge incineration ash and quick lime according to the mass ratio of 1: 0.9.
In the cationic polyquaternary ammonium salt compound medicament, polyquaternary ammonium salt is a copolymer of N, N-dimethyl-N-2-propenyl-2-propylene ammonium chloride and acrylamide, single-chain quaternary ammonium salt is dodecyl dimethyl benzyl ammonium chloride, and double-chain quaternary ammonium salt is didecyl dimethyl ammonium chloride.
The embodiment also provides a method for performing composite conditioning and deep dehydration on sludge by adopting the medicament, which comprises the following steps:
1) pumping the sludge into a conditioning tank, and adjusting the water content of the sludge to 98.2%;
2) adding a wall breaking conditioner accounting for 8.0 percent of the dry weight of the sludge into the sludge pretreated in the step 1), and stirring for 20min at the stirring intensity of 120 r/min;
3) adding a conditioning auxiliary agent accounting for 15.0 percent of the dry weight of the sludge into the sludge obtained after the treatment in the step 2), and stirring for 5min at the stirring strength of 350 r/min;
4) pumping the sludge conditioned in the step 3) into a mechanical filter pressing dehydration device for dehydration, and reducing the water content of the dewatered sludge to 56.5 percent to finish the composite conditioning and deep dehydration of the sludge.
Comparative example 1
The wall breaking conditioning agent and the conditioning aid in the embodiment are the same as those in the embodiment 1, and the dosage of the agent and the aid is increased. The sludge is conditioned and dehydrated according to the following steps:
1) pumping the sludge into a conditioning tank, and adjusting the water content of the sludge to 97.2%;
2) adding a wall breaking conditioner with the sludge dry weight of 6%, and stirring for 10min at the stirring strength of 80 r/min;
3) adding a conditioning auxiliary agent accounting for 1.0 percent of the dry weight of the sludge into the sludge obtained after the treatment in the step 2), and stirring for 5min n at the stirring strength of 300 r/min;
4) pumping the sludge conditioned in the step 3) into a mechanical filter pressing dehydration device for dehydration to complete the composite conditioning and deep dehydration of the sludge.
And detecting, and reducing the water content of the sludge to 61.5% after dehydration.
Comparative example 2
This example is a comparative example of example 3, and the difference between this example and example 3 is that the wall breaking treatment agent in the agents used is a single polyquaternium agent and a single conditioning aid. The sludge is conditioned and dehydrated according to the following steps, wherein the single polyquaternium adopts a copolymer of N, N-dimethyl-N-2-propenyl-2-propylene ammonium chloride and acrylamide, and the single conditioning auxiliary adopts sludge incineration ash residues:
1) pumping the sludge into a conditioning tank, and adjusting the water content of the sludge to 98%;
(2) adding a polymerized quaternary ammonium salt agent accounting for 6% of the dry weight of the sludge into the sludge obtained after pretreatment in the step 1), and stirring for 15min at the stirring strength of 100 r/min;
(3) adding conditioning compound auxiliary agent accounting for 8% of the dry weight of the sludge into the sludge obtained after the treatment in the step 2), and stirring for 5min at the stirring strength of 325 r/min;
(4) pumping the sludge conditioned in the step 3) into a mechanical filter pressing dehydration device for dehydration to complete the composite conditioning and deep dehydration of the sludge.
And detecting, and after dehydration, reducing the water content of the sludge to 59.8%.
Comparative example 3
The wall breaking conditioner in this example was the same as in example 4, without the addition of conditioning aids. The sludge is conditioned and dehydrated according to the following steps:
1) pumping the sludge into a conditioning tank, and adjusting the water content of the sludge to 98.5%;
2) adding a polymeric quaternary ammonium salt compound medicament accounting for 8% of the dry weight of the sludge into the sludge pretreated in the step 1), and stirring for 20min at the stirring strength of 120 r/min;
3) pumping the sludge conditioned in the step 2) into a mechanical filter pressing dehydration device for dehydration to complete the composite conditioning and deep dehydration of the sludge.
And detecting, and after dehydration, reducing the water content of the sludge to 62.5%.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Furthermore, those skilled in the art will appreciate that while some embodiments herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the claims above, any of the claimed embodiments may be used in any combination. The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Claims (10)
1. The sludge composite conditioning and deep dehydration medicament is characterized by comprising a polymeric quaternary ammonium salt serving as a wall-breaking conditioner and a conditioning aid, wherein the wall-breaking conditioner accounts for 1.0-8.0% of the dry weight of the sludge, and the conditioning aid accounts for 1.0-15.0% of the dry weight of the sludge.
2. The composite sludge conditioning and deep dewatering agent as claimed in claim 1, wherein the polymeric quaternary ammonium salt as the wall breaking conditioning agent is a cationic polymeric quaternary ammonium salt composite agent.
3. The sludge composite conditioning and deep dewatering agent as claimed in claim 2, wherein the cationic polyquaternium compound agent is one or more of polyquaternium, single chain quaternary ammonium salt and double chain quaternary ammonium salt.
4. The sludge composite conditioning and deep dewatering agent as claimed in claim 3, wherein the cationic polyquaternium compound agent is a polyquaternium, a compound of a single-chain quaternary ammonium salt and a double-chain quaternary ammonium salt in a mass ratio of 1: 0.1-1.
5. The sludge composite conditioning and deep dewatering agent as claimed in claim 3, wherein the polyquaternium is N, N-dimethyl-N-2-propenyl-2-propenylammonium chloride/acrylamide graft copolymer, the single-chain quaternary ammonium salt is dodecyl dimethyl benzyl ammonium chloride, and the double-chain quaternary ammonium salt is didecyl dimethyl ammonium chloride.
6. The agent for compound conditioning and deep dewatering of sludge according to claim 1, wherein the conditioning aid is one or more of sludge incineration ash, quicklime, calcium peroxide, calcium hydroxide and sodium hydroxide.
7. The composite conditioning and deep dewatering agent for sludge according to claim 6, wherein the conditioning aid is incineration ash and quicklime in a mass ratio of 1: 0.1-0.9.
8. The composite conditioning and deep dewatering agent for sludge according to claim 1, wherein the composite conditioning and deep dewatering sludge is sludge from a municipal sewage treatment plant.
9. The method for performing composite conditioning and deep dehydration on sludge by using the medicament according to any one of claims 1 to 8, which is characterized by comprising the following steps of:
1) pumping sludge into a conditioning tank, and adjusting the water content of the sludge to 95% -98%;
2) adding a wall breaking conditioner accounting for 1.0-8.0% of the dry weight of the sludge into the sludge pretreated in the step 1), and stirring for 10-20 min at a stirring strength of 80-120 r/min;
3) adding a conditioning auxiliary agent accounting for 1.0-15.0% of the dry weight of the sludge into the sludge obtained after the treatment in the step 2), and stirring for 5min at the stirring strength of 300-350 r/min;
4) pumping the sludge conditioned in the step 3) into a mechanical filter pressing dehydration device for dehydration to finish the composite conditioning and deep dehydration of the sludge.
10. The method for compound conditioning and deep dewatering of sludge according to claim 9, wherein the moisture content of the treated sludge is reduced to 56.5-63.8%.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113354252A (en) * | 2021-07-07 | 2021-09-07 | 浙江桃花源环保科技有限公司 | Novel sludge drying conditioner and preparation method thereof |
| CN114262133A (en) * | 2021-12-15 | 2022-04-01 | 中南水务科技有限公司 | Low-temperature sludge drying conditioner and use method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101985386A (en) * | 2010-12-09 | 2011-03-16 | 湖南多普生环境能源有限公司 | Conditioner and conditioning method for dewatering of domestic sludge |
| CN102531329A (en) * | 2012-01-09 | 2012-07-04 | 苏州格瑞特环保科技产业发展有限公司 | Organic composite flocculant for conditioning and dehydration of sludge |
| CN103172250A (en) * | 2013-01-16 | 2013-06-26 | 浙江清园生态热电有限公司 | Multi-variant sludge tempering process |
-
2020
- 2020-12-29 CN CN202011588537.6A patent/CN112811774A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101985386A (en) * | 2010-12-09 | 2011-03-16 | 湖南多普生环境能源有限公司 | Conditioner and conditioning method for dewatering of domestic sludge |
| CN102531329A (en) * | 2012-01-09 | 2012-07-04 | 苏州格瑞特环保科技产业发展有限公司 | Organic composite flocculant for conditioning and dehydration of sludge |
| CN103172250A (en) * | 2013-01-16 | 2013-06-26 | 浙江清园生态热电有限公司 | Multi-variant sludge tempering process |
Non-Patent Citations (2)
| Title |
|---|
| 朱洪法等: "《工业助剂手册》", 30 June 2007, 金盾出版社 * |
| 李兵等: "《污泥表征与预处理技术》", 31 August 2010, 冶金工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113354252A (en) * | 2021-07-07 | 2021-09-07 | 浙江桃花源环保科技有限公司 | Novel sludge drying conditioner and preparation method thereof |
| CN114262133A (en) * | 2021-12-15 | 2022-04-01 | 中南水务科技有限公司 | Low-temperature sludge drying conditioner and use method thereof |
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