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CN-122010388-A - Conditioner for sludge dewatering and preparation method and application thereof

CN122010388ACN 122010388 ACN122010388 ACN 122010388ACN-122010388-A

Abstract

The invention provides a conditioner for sludge dewatering, a preparation method and application thereof, and relates to the technical field of sludge treatment, wherein the conditioner for sludge dewatering comprises, by weight, 0.3-0.4 part of acrylamide, 25-30 parts of trimethyl propylene ammonium chloride, 65-70 parts of dimethyl diallyl ammonium chloride, 1.0-2.0 parts of a surfactant, 1.1-1.8 parts of a photoinitiator and 150-170 parts of deionized water. According to the invention, a large amount of inorganic coagulant and lime are avoided, so that the combustion value of the sludge is maintained, the water content of the sludge is lower than 50%, the incineration treatment of a power plant is facilitated, and the green emission is realized. The conditioner is neutral and has small dosage, avoids corroding the filter cloth, reduces the filter cloth blockage under the promotion effect of the surfactant, is convenient for stripping the sludge from the filter cloth, prolongs the service life of equipment, and reduces the use cost of the conditioner, the transportation cost of the sludge and the operation cost of the plate frame desliming machine.

Inventors

  • WEN KANG
  • WU XIA
  • LIANG JING
  • LU XIANCHUN
  • HU GUANGHUI
  • ZHU DINGYANG

Assignees

  • 天津环创科技发展有限公司
  • 扬州科苑化工有限公司
  • 信开环境投资集团有限公司

Dates

Publication Date
20260512
Application Date
20260210

Claims (10)

  1. 1. The conditioner for sludge dewatering is characterized by comprising, by weight, 0.3-0.4 part of acrylamide, 25-30 parts of trimethyl propylene ammonium chloride, 65-70 parts of dimethyl diallyl ammonium chloride, 1.0-2.0 parts of a surfactant, 1.1-1.8 parts of a photoinitiator and 150-170 parts of water.
  2. 2. The conditioner for sludge dewatering according to claim 1, wherein the surfactant is a cationic surfactant, comprising one or more of polydimethyldiallylammonium chloride, cetyltrimethylammonium bromide, chitosan and derivatives thereof, octadecyl trimethylammonium chloride; and/or the photoinitiator comprises one or more of ferric salt, 2-isopropyl thioxanthone, alpha-hydroxy isobutyryl benzene and 1-hydroxy cyclohexyl phenyl ketone.
  3. 3. The conditioner for sludge dewatering according to claim 1, wherein the conditioner for sludge dewatering is a liquid conditioner having a colorless or pale yellow color; And/or the viscosity of the conditioner for sludge dewatering is 8000-12000Cp.
  4. 4. A method for preparing the conditioner for sludge dewatering as claimed in any one of claims 1 to 3, comprising the steps of: S1, pre-dissolving, namely adding acrylamide into part of deionized water, and carrying out sectional temperature control stirring to obtain a premix; s2, monomer mixing, namely sequentially adding trimethyl propylene ammonium chloride and dimethyl diallyl ammonium chloride into the premix, and stirring at a low temperature to obtain a mixed solution; s3, surface modification, namely premixing a surfactant and the rest deionized water, adding the mixture into the mixed solution, and heating to obtain a modified solution; And S4, curing, namely cooling the modified solution, adding a photoinitiator, performing photocatalytic reaction, and finally heating to 70 ℃ to stop the reaction to obtain the conditioner for sludge dewatering.
  5. 5. The method for preparing a conditioner for sludge dewatering according to claim 4, wherein in the step S1, the step of stirring includes: when the stirring time is less than or equal to 5min, stirring at 9-11 deg.C; Stirring at 12-15deg.C for >5min until acrylamide is dissolved; And/or, in the step S1, the part of deionized water accounts for 20-30% of the total weight of the deionized water.
  6. 6. The method for preparing a conditioner for sludge dewatering according to claim 4, wherein in the step S2, the temperature of the low-temperature stirring is not more than 15 ℃, the stirring speed is 200-300rpm, and the stirring time is 30-45min.
  7. 7. The method for producing a conditioner for sludge dewatering according to claim 4, wherein in step S3, the temperature-increasing treatment comprises: the temperature was raised to 35-40 ℃ and the pH was maintained at 6.8-7.2.
  8. 8. The method for preparing a conditioner for sludge dewatering according to claim 4, wherein in the step S4, the modified solution is cooled to be less than or equal to 5 ℃, and then a photoinitiator is added; and/or, the photocatalytic reaction includes the following conditions: Under the protection atmosphere, adopting a light source with the wavelength of 250-400nm, and stirring for 1.5-2.0h at the rotating speed of 50-80rpm under the condition that the illumination intensity is 10-100mW/cm 2 ; The protective atmosphere comprises one of nitrogen, argon and helium, and the air pressure of the protective atmosphere is 0.05-0.2MPa; And/or, in the step S4, the temperature rising rate of rising to 70 ℃ is 2-5 ℃ per min.
  9. 9. Use of the conditioner for sludge dewatering according to any one of claims 1 to 3 or the conditioner for sludge dewatering produced by the method for producing the conditioner for sludge dewatering according to any one of claims 4 to 8 for dewatering treatment of municipal sewage plant sludge, industrial organic sludge or oily sludge.
  10. 10. The use according to claim 9, wherein the amount of conditioner for sludge dewatering added is 0.2-0.6% of the dry weight of the sludge.

Description

Conditioner for sludge dewatering and preparation method and application thereof Technical Field The invention relates to the technical field of sludge treatment, in particular to a conditioner for sludge dewatering and a preparation method and application thereof. Background Along with the rapid development of the economy and the acceleration of the urban treatment in China, the scale of urban sewage treatment is continuously enlarged, and the sludge yield is rapidly increased. The water content of the sludge is high, the treatment cost is very high, for example, the annual average sludge dewatering treatment cost of a 30 ten thousand ton sewage treatment plant is up to 8000 ten thousand yuan, and a heavy burden is brought to enterprises and society, so that how to reduce the water content of the sludge and the operation cost by using a combination mode of a machine and an efficient medicament for sludge dewatering is a technical problem to be solved by the sewage treatment plant. Currently, the water content of sludge discharged by urban sewage treatment plants is generally up to 80%, and one commonly used sludge dewatering process is a chemical modification-plate and frame desliming process. The core technology of the process is chemical conditioning (modification) of sludge, and the traditional sludge conditioner is polyaluminium chloride and lime, specifically, 150KG polyaluminium chloride and 200KG lime are required to be added into every 1000KG sludge. The process has the following defects that 1, the sludge discharge amount is increased after lime is added, the overall combustion value is reduced, the lime is a high-energy-consumption and high-pollution industry and is easy to cause secondary pollution, 2, the conditioned sludge combustion value is low, the disposal and utilization modes such as composting, incineration and brick making are not facilitated, and 3, the moisture content of the conditioned sludge is not less than 65%, so that the current environment-friendly requirement is difficult to meet. In view of this, the present invention has been made. Disclosure of Invention The invention aims to provide a conditioner for sludge dewatering, a preparation method and application thereof, and a large amount of inorganic coagulant and lime are avoided, so that the combustion value of original sludge can be kept, the water content of the sludge is lower than 50%, the sludge is convenient to burn by a power plant, the discharge amount of the sludge is greatly reduced, and green discharge is realized. Furthermore, the conditioner is neutral and has small dosage, so that the corrosion of the filter cloth caused by adding the inorganic coagulant which is acidic is avoided, the filter cloth is reduced to be blocked under the promotion effect of the surfactant, the sludge is conveniently stripped from the filter cloth, the service life of equipment is prolonged, and meanwhile, the integral dosage of the conditioner is reduced, and the use cost of the conditioner, the transportation cost of the sludge and the operation cost of the plate-frame desliming machine are reduced. In order to achieve the above purpose, the present invention adopts the following technical scheme: The invention provides a conditioner for sludge dewatering, which comprises, by weight, 0.3-0.4 part of acrylamide, 25-30 parts of trimethyl propylene ammonium chloride, 65-70 parts of dimethyl diallyl ammonium chloride, 1.0-2.0 parts of a surfactant, 1.1-1.8 parts of a photoinitiator and 150-170 parts of water. Further, on the basis of the technical scheme, the surfactant is a cationic surfactant and comprises one or more of polydimethyldiallyl ammonium chloride, cetyltrimethylammonium bromide, chitosan and derivatives thereof, and octadecyl trimethyl ammonium chloride; and/or the photoinitiator comprises one or more of ferric salt, 2-isopropyl thioxanthone, alpha-hydroxy isobutyryl benzene and 1-hydroxy cyclohexyl phenyl ketone. Furthermore, on the basis of the technical scheme, the conditioner for sludge dewatering is a colorless or pale yellow liquid conditioner; And/or the viscosity of the conditioner for sludge dewatering is 8000-12000Cp. The invention also provides a preparation method of the conditioner for sludge dewatering, which comprises the following steps: S1, pre-dissolving, namely adding acrylamide into part of deionized water, and carrying out sectional temperature control stirring to obtain a premix; s2, monomer mixing, namely sequentially adding trimethyl propylene ammonium chloride and dimethyl diallyl ammonium chloride into the premix, and stirring at a low temperature to obtain a mixed solution; s3, surface modification, namely premixing a surfactant and the rest deionized water, adding the mixture into the mixed solution, and heating to obtain a modified solution; And S4, curing, namely cooling the modified solution, adding a photoinitiator, performing photocatalytic reaction, and finally heating to 70 ℃ to stop th