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CN-122010317-A - Composite reagent for recycling waste water in coking industry and preparation method thereof

CN122010317ACN 122010317 ACN122010317 ACN 122010317ACN-122010317-A

Abstract

The invention relates to the technical field of scale inhibitors, and provides a composite medicament for recycling waste water in coking industry and a preparation method thereof, wherein the composite medicament for recycling waste water in coking industry comprises, by weight, 10-14 parts of sodium polyaspartate, 10-14 parts of polyepoxysuccinic acid, 4-4.5 parts of quaternized chitosan, 1-2 parts of tannin, 1-2 parts of sodium alginate, 0.3-0.5 part of sodium tripolyphosphate and 50-60 parts of solvent. Through the technical scheme, the problem of low scale inhibition efficiency of the scale inhibitor in the related technology is solved.

Inventors

  • DONG SHENG
  • DONG ZHAOXIANG
  • DONG JIAYU

Assignees

  • 河北奥博水处理有限公司

Dates

Publication Date
20260512
Application Date
20260331

Claims (10)

  1. 1. The composite agent for recycling the wastewater in the coking industry is characterized by comprising, by weight, 10-14 parts of sodium polyaspartate, 10-14 parts of polyepoxysuccinic acid, 4-4.5 parts of quaternized chitosan, 1-2 parts of tannin, 1-2 parts of sodium alginate, 0.3-0.5 part of sodium tripolyphosphate and 50-60 parts of solvent.
  2. 2. The composite reagent for recycling waste water in coking industry according to claim 1, wherein the raw materials of the composite reagent further comprise 0.5-1 part of cellulose derivative.
  3. 3. The composite reagent for recycling waste water in coking industry according to claim 2, wherein the cellulose derivative comprises cationic cellulose and anionic cellulose in a mass ratio of 1:0.5-1.5.
  4. 4. The composite agent for recycling waste water from coking industry according to claim 1, wherein the tannin comprises sulfonated tannin.
  5. 5. The composite agent for recycling waste water in coking industry according to claim 4, wherein the tannin is sulfonated tannin.
  6. 6. A method for preparing a composite medicament for recycling waste water in coking industry, which is used for preparing the composite medicament according to any one of claims 1-5, and is characterized by comprising the following steps: S1, heating a solvent to 35-40 ℃, and adding sodium polyaspartate and polyepoxysuccinic acid for mixing to obtain a mixture I; S2, adding tannin, sodium alginate and sodium tripolyphosphate into the mixture I, and mixing to obtain a mixture II; S3, adding the rest components into the mixture II, and mixing to obtain the composite medicament.
  7. 7. The preparation method of the composite reagent for recycling wastewater in coking industry according to claim 6, wherein in the step S1, the mixing time is 20-30 min, the mixing temperature is 35-40 ℃, and the mixing rotating speed is 150-200 r/min.
  8. 8. The preparation method of the composite reagent for recycling waste water in coking industry according to claim 6, wherein in the step S2, the mixing time is 35-45 min, the mixing temperature is 35-40 ℃, and the mixing rotating speed is 300-400 r/min.
  9. 9. The preparation method of the composite reagent for recycling waste water in coking industry according to claim 6, wherein in the step S3, the mixing time is 40-45 min, the mixing temperature is 35-40 ℃, and the mixing rotating speed is 300-400 r/min.
  10. 10. The preparation method of the composite reagent for recycling wastewater in coking industry, which is characterized in that step S2 is specifically that after half of the total mass of tannin, sodium alginate and sodium tripolyphosphate are added into the mixture I for first mixing, the rest tannin, sodium alginate and sodium tripolyphosphate are added for second mixing, so that a mixture II is obtained.

Description

Composite reagent for recycling waste water in coking industry and preparation method thereof Technical Field The invention relates to the technical field of scale inhibitors, in particular to a composite agent for recycling waste water in coking industry and a preparation method thereof. Background The coking industry is a core matching link of the steel industry and the coal chemical industry, and a large amount of coking wastewater containing high-concentration scale-forming ions can be generated in the processes of coke production, gas purification and chemical product recovery, so that insoluble salt substances such as calcium carbonate and the like are extremely easy to form, scale layers are formed on the surfaces of running equipment or pipelines, even the pipelines are blocked, the cleaning frequency is increased, the cost of recycling the wastewater in the coking industry is increased, and the normal running of the equipment is influenced. Therefore, in order to better ensure the recycling efficiency of the wastewater in the coking industry, the scaling problem in the recycling process of the coking wastewater needs to be further solved, the normal and safe operation of equipment is protected, and the problems of scale layer and excessive thickness of the scale layer still exist in the actual application process of the traditional composite medicament. Disclosure of Invention The invention provides a composite reagent for recycling waste water in coking industry and a preparation method thereof, which solve the problem of low scale inhibition efficiency of scale inhibitors in the related technology. The technical scheme of the invention is as follows: the invention provides a composite reagent for recycling waste water in coking industry, which comprises, by weight, 10-14 parts of sodium polyaspartate, 10-14 parts of polyepoxysuccinic acid, 4-4.5 parts of quaternized chitosan, 1-2 parts of tannin, 1-2 parts of sodium alginate, 0.3-0.5 part of sodium tripolyphosphate and 50-60 parts of solvent. As a further technical scheme, the solvent is water. As a further technical scheme, the raw materials of the composite medicament further comprise 0.5-1 part of cellulose derivative, for example, 0.5 part, 0.6 part, 0.7 part, 0.8 part, 0.9 part and 1 part. As a further technical scheme, the cellulose derivative is composed of cationic cellulose and anionic cellulose with a mass ratio of 1:0.5-1.5, for example, 1:0.5, 1:1, 1:1.5, preferably 1:1. As a further embodiment, the tannin comprises a sulfonated tannin. As a further technical scheme, the tannin is sulfonated tannin. The invention also provides a preparation method of the composite medicament for recycling the wastewater in the coking industry, which is used for preparing the composite medicament and comprises the following steps of: S1, heating a solvent to 35-40 ℃, and adding sodium polyaspartate and polyepoxysuccinic acid for mixing to obtain a mixture I; S2, adding tannin, sodium alginate and sodium tripolyphosphate into the mixture I, and mixing to obtain a mixture II; S3, adding the rest components into the mixture II, and mixing to obtain the composite medicament. As a further technical scheme, in the step S1, the mixing time is 20-30 min, the mixing temperature is 35-40 ℃, and the mixing rotating speed is 150-200 r/min. As a further technical scheme, in the step S2, the mixing time is 40-45 min, the mixing temperature is 35-40 ℃, and the mixing rotating speed is 300-400 r/min. As a further technical scheme, in the step S3, the mixing time is 35-45 min, the mixing temperature is 35-40 ℃, and the mixing rotating speed is 300-400 r/min. As a further technical scheme, the step S2 is specifically that half of the total mass of tannin, sodium alginate and sodium tripolyphosphate are added into the mixture I for first mixing, and then the rest tannin, sodium alginate and sodium tripolyphosphate are added for second mixing, so that a mixture II is obtained. The working principle and the beneficial effects of the invention are as follows: the sodium polyaspartate and polyepoxysuccinic acid in the composite medicament have a certain inhibition effect on the generation of scale such as calcium, magnesium and the like because of containing carboxyl, the quaternized chitosan, the tannin and the sodium alginate can synergistically improve the scale inhibition effect of the composite medicament, and the addition of a proper amount of sodium tripolyphosphate can destroy the normal growth of scale-forming crystals such as calcium carbonate and the like, thereby playing a role in scale inhibition, limiting the proportion of each component in the composite medicament and improving the scale inhibition effect of the composite medicament. Detailed Description The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the desc