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CN-121974513-A - Sewage generated by cage grinding process and cleaning liquid sewage treatment method

CN121974513ACN 121974513 ACN121974513 ACN 121974513ACN-121974513-A

Abstract

The application discloses a sewage and cleaning liquid sewage treatment method generated by a cage grinding process, and belongs to the technical field of sewage treatment. The treatment method comprises the following steps of adding a magnetic suction rod and a pretreatment reagent into sewage generated by a grinding process and cleaning liquid sewage for treatment, performing primary filter pressing, conveying the sewage into a sewage tank, mixing the sewage treatment reagent with water, loading the mixture into a medicine liquid tank, synchronously conveying the mixture into a stirring tank for primary stirring, adding an oxidant for secondary stirring, performing secondary filter pressing, conveying the mixture into a precipitation tank, and standing to obtain treated water. The method combines the sewage generated by grinding and the sewage generated by the subsequent cleaning process, carries out pretreatment by a pretreatment reagent and a magnetic suction rod, and then degrades and removes organic pollutants in the sewage by adding the sewage treatment reagent and an oxidant in cooperation, thereby reducing the COD value in the sewage.

Inventors

  • ZHAO PEIZHEN
  • ZHENG GUANGHUI
  • Wen Chunguo
  • ZHENG JINKAI

Assignees

  • 金源(山东)新能源科技发展有限公司

Dates

Publication Date
20260505
Application Date
20260128

Claims (10)

  1. 1. The method for treating the sewage generated by the cage grinding process and the sewage of the cleaning liquid is characterized by comprising the following steps: (1) Adding a magnetic suction rod into sewage generated by a grinding process and sewage of a cleaning liquid, adding a pretreatment reagent, stirring for reacting for 20-30min, and performing primary filter pressing to remove impurities with larger particles in the sewage; (2) Conveying the sewage pretreated in the step (1) into a sewage tank, mixing a sewage treatment medicament with water to obtain a sewage treatment liquid medicine, filling the sewage treatment liquid medicine into the liquid medicine tank, synchronously conveying the sewage treatment liquid medicine and the sewage into the stirring tank, stirring for the first time in the stirring tank for 0.5-1h, adding an oxidant into the stirring tank, and stirring for the second time for 20-30min; (3) And (3) conveying the water treated in the step (2) to a precipitation tank after secondary filter pressing, and standing for 45-60min in the precipitation tank to obtain the treated water.
  2. 2. The method for treating wastewater generated in a cage grinding process and wastewater from a cleaning solution according to claim 1, wherein the pretreatment agent is added in an amount of 10-15g/m 3 .
  3. 3. The method for treating wastewater generated in a cage grinding process and wastewater from a cleaning solution according to claim 1, wherein the amount of the wastewater treatment chemical added is 32-40g/m 3 .
  4. 4. The method for treating wastewater produced by a cage polishing process according to claim 1, wherein the stirring speed of the first stirring in the step (2) is 60 to 80r/min, and/or The stirring speed of the second stirring in the step (2) is 40-50r/min.
  5. 5. The method for treating wastewater generated by the cage grinding process and wastewater from the cleaning solution according to claim 1, wherein the addition amount of the oxidizing agent is 2-4g/m 3 .
  6. 6. The method for treating sewage and cleaning liquid sewage generated by the cage grinding process according to claim 1, wherein the sewage treatment agent comprises, by mass, 10-20 parts of polyacrylamide, 5-10 parts of activated carbon, 10-15 parts of modified chitosan and 10-20 parts of polyaluminium chloride; The modified chitosan is prepared from chitosan and tetrachloro-1, 4-benzoquinone through an addition reaction.
  7. 7. The method for treating sewage generated by the cage grinding process and the sewage of the cleaning liquid according to claim 1, wherein the method for preparing the modified chitosan comprises the following steps: s1, adding chitosan into an acetic acid aqueous solution, regulating the pH value of the chitosan aqueous solution to 5.0-5.5 by using an alkaline solution, and stirring until the chitosan aqueous solution is completely dissolved to obtain a chitosan solution; s2, adding tetrachloro-1, 4-benzoquinone into absolute ethyl alcohol, stirring and mixing uniformly, then dripping into chitosan solution, and stirring and reacting under the condition of avoiding light; And S3, collecting precipitate after centrifugation or filtration, repeatedly washing the precipitate with water until the supernatant is colorless, and freeze-drying to obtain the modified chitosan.
  8. 8. The method for treating wastewater generated in a cage grinding process according to claim 7, wherein in the step S2, the reaction temperature is 30-50 ℃ and the reaction time is 8-12 hours.
  9. 9. The method for treating wastewater generated by a cage grinding process and wastewater from a cleaning solution according to claim 7, wherein the molar ratio of chitosan to tetrachloro-1, 4-benzoquinone is 1 (0.4-0.6).
  10. 10. The method for treating wastewater generated in a cage polishing process as recited in claim 7, wherein the oxidizing agent is peracetic acid.

Description

Sewage generated by cage grinding process and cleaning liquid sewage treatment method Technical Field The application relates to a sewage and cleaning liquid sewage treatment method generated by a cage grinding process, and belongs to the technical field of sewage treatment. Background The grinding process of the retainer and the sewage generated in the subsequent cleaning process have complex components and high treatment difficulty, and grinding liquid is used for precise grinding in the grinding process, wherein the grinding liquid usually contains an emulsifying agent, a wetting agent, an antirust agent (such as inorganic salt and organic amine), an extreme pressure additive (a compound containing sulfur, phosphorus and chlorine), base oil, metal scraps, abrasive particles and the like. In the cleaning process, a cleaning agent is mainly used for removing the residues and greasy dirt of the grinding fluid on the surface of the workpiece, and the cleaning agent generally contains alkali substances such as sodium hydroxide, sodium silicate and the like, and auxiliary agents such as a composite surfactant, a defoaming agent and the like. Therefore, the surfactant in the sewage generated by the cage grinding process and the sewage in the cleaning liquid can lead the oil content and the fine particles to form stable oil-in-water emulsion, the demulsification difficulty is high, the emulsion contains a large amount of organic compositions which are difficult to biodegrade, the biodegradability is poor, the particle size of the metal powder and the abrasive powder is small, and the sedimentation and the filtration are difficult. In the prior art, inorganic salt coagulants are generally used for demulsification of sewage containing a large amount of organic pollutants and metal ions, but the effect is poor, the removal rate of oil and COD is low, the treated water is often turbid, the treated water cannot reach the standard stably, and the produced sludge is large. And the difficultly degraded synthetic organic matters in the sewage have inhibition and even toxicity to microorganisms, so that the treatment efficiency is low. Meanwhile, in the prior art, the sewage generated by grinding and the sewage generated by cleaning are treated respectively, so that the treatment mode can increase the repeatability of treatment, the impurity content of the sewage generated by the grinding process is higher, the difficulty in the treatment process is increased, and the treatment time is shortened and the treatment efficiency is improved by only carrying out one-time treatment after the sewage generated by grinding and the sewage generated by the subsequent cleaning process are combined. Disclosure of Invention In order to solve the problems, the method for treating the sewage generated by the retainer grinding process and the sewage of the cleaning liquid is provided, wherein the sewage generated by the retainer grinding process and the sewage generated by the subsequent cleaning process are combined and treated, part of metal ions and impurities in the sewage are adsorbed and removed through a pretreatment reagent and a magnetic suction rod, then the sewage treatment reagent is added to treat the residual impurities, and the oxidant is added to degrade and remove organic pollutants in the sewage in cooperation with the sewage treatment agent, so that the COD value in the sewage is reduced. In one aspect of the application, a method for treating sewage generated by a cage grinding process and sewage of cleaning liquid is provided, which comprises the following steps: (1) Adding a magnetic suction rod into sewage generated by a grinding process and sewage of a cleaning liquid, adding a pretreatment reagent, stirring for reacting for 20-30min, and performing primary filter pressing to remove impurities with larger particles in the sewage; (2) Conveying the sewage pretreated in the step (1) into a sewage tank, mixing a sewage treatment medicament with water to obtain a sewage treatment liquid medicine, filling the sewage treatment liquid medicine into the liquid medicine tank, synchronously conveying the sewage treatment liquid medicine and the sewage into the stirring tank, stirring for the first time in the stirring tank for 0.5-1h, adding an oxidant into the stirring tank, and stirring for the second time for 20-30min; (3) And (3) conveying the water treated in the step (2) to a precipitation tank after secondary filter pressing, and standing for 45-60min in the precipitation tank to obtain the treated water. Under the treatment method, the magnetic attraction rod and the pretreatment agent act synergistically to adsorb or polymerize ferromagnetic metal powder or particles and oil drops in the sewage, so that the content of dispersed impurities in the sewage is reduced, and then the agglomerated impurities and the impurities with larger particles are removed from the sewage through primary filter pressing. The sewage treat