Method and device for carrying out integrated in-situ treatment on waste solvents

A technology for in-situ treatment and waste solvent, applied in the fields of metallurgical wastewater treatment, chemical instruments and methods, special compound water treatment, etc. Potential explosive safety hazards and the effect of improving biodegradability

Pending Publication Date: 2018-03-13
深圳瑞赛环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide an integrated in-situ treatment method and device for waste solvent in view of the high cost of waste solvent recovery and treatment methods in the prior art and the technical problems of flammable and explosive safety hazards

Method used

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  • Method and device for carrying out integrated in-situ treatment on waste solvents
  • Method and device for carrying out integrated in-situ treatment on waste solvents
  • Method and device for carrying out integrated in-situ treatment on waste solvents

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0122] Waste solvent 50L, add water to dilute to 250L, test COD of waste solvent Cr =82540mg / L, BOD 5 =4700mg / L, BOD 5 / COD Cr =0.056, add 2‰ coagulant PAC (polyaluminum) through an automatic dosing device, stir for 20 minutes, and use an air flotation slag scraper to scrape slag. The first-level purification solvent enters the first-level aeration micro-electrolysis, adjusts pH = 2, Fe / C = 1:1, the volume ratio of the iron-carbon filler to the first-level purification solvent is 1:1, aeration micro-electrolysis for 2 hours, and the first-level purification The solvent enters the first-level Fenton oxidation treatment, adjusts pH = 2, adds 2‰ of 50% hydrogen peroxide, stirs for 0.5h, adds 2‰ coagulant PAM (polyacrylamide) through the automatic dosing device, stirs for 10min, and statically Set for 10min, test the CODcr=50800mg / L of the secondary purification solvent, BOD 5 =6560mg / L, BOD 5 / COD Cr = 0.13; the secondary purification solvent enters the secondary aeration m...

Embodiment 2

[0124] Waste solvent 50L, add water to dilute to 2500L, test COD of waste solvent Cr =8495mg / L, BOD 5 =500mg / L, BOD 5 / COD Cr =0.059 Add 3‰ coagulant PAC through the automatic dosing device, stir for 10 minutes, and use the air flotation slag scraper to scrape the slag. The first-level purification solvent enters the first-level aeration micro-electrolysis, adjusts pH = 2, Fe / C = 1:1, the volume ratio of iron-carbon filler to the first-level purification solvent is 4:3, aeration micro-electrolysis for 3 hours, and the first-level purification The solvent enters the first-level Fenton oxidation treatment, adjusts pH = 3, adds 8‰ of 50% hydrogen peroxide, stirs and reacts for 1 hour, adds 3‰ coagulant PAM through the automatic dosing device, stirs for 10 minutes, stands still for 10 minutes, and tests the second level CODcr of purified solvent=4983mg / L, BOD 5 =645mg / L, BOD 5 / COD Cr =0.129; the secondary purification solvent enters the secondary aeration micro-electrolysis...

Embodiment 3

[0126] Waste solvent 50L, add water to dilute to 1000L, test COD of waste solvent Cr =20810mg / L, BOD 5 =1201mg / L, BOD 5 / COD Cr =0.058; add 2‰ coagulant PAC through the automatic dosing device, stir for 20 minutes, and use the air flotation slag scraper to scrape the slag. The first-level purification solvent enters the first-level aeration micro-electrolysis, adjusts pH=3, Fe / C=7:3, the volume ratio of iron-carbon filler to the first-level purification solvent is 7:6, aeration micro-electrolysis for 2 hours, and the first-level purification The solvent enters the first-level Fenton oxidation treatment, adjusts pH=4, adds 50% hydrogen peroxide at 5‰, stirs and reacts for 1 hour, adds 2‰ coagulant PAM through the automatic dosing device, stirs for 20 minutes, stands still for 20 minutes, and tests the second level CODcr of purified solvent=10610mg / L, BOD 5 =1798mg / L, BOD 5 / COD Cr =0.17; the secondary purification solvent enters the secondary micro-electrolysis, adjusts p...

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Abstract

The invention belongs to the field of waste water treatment, and relates to a device for carrying out integrated in-situ treatment on waste solvents. The device comprises an adjusting tank, a first stage coagulative precipitation tank, a first stage aeration micro-electrolytic cell, a first stage Fenton oxidation tank, a second stage coagulative precipitation tank, a second stage aeration micro-electrolytic cell, a second stage Fenton oxidation tank, a third stage coagulative precipitation tank and a biochemical treatment pond. The invention also discloses a method for carrying out integratedin-situ treatment on the waste solvents. The method and the device for carrying out integrated in-situ treatment on the waste solvents solve the problem that the existing non-polar waste solvent recovery and treatment method is high in cost and has safety hazards of being inflammable and explosive. After the device and the method are adopted, the concentration of CODCr in the waste solvents can beeffectively reduced, the toxicity of organic matters to microorganisms is reduced, the biodegradability of the waste solvents is improved, and the waste solvents are enabled to reach the discharge standard of sewage after being subjected to the ordinary biochemical treatment.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, in particular to an integrated in-situ treatment method and device for waste solvents. Background technique [0002] PCB (Printed Circuit Board, that is, printed circuit board) is one of the important components of the electronics industry, mainly used for electrical interconnection between electronic components in equipment. In the production process of PCB, inks such as black oil, dry film, wet film or green oil are commonly used to print and code the PCB. Screen frames are usually used in the process of printing and coding on PCBs, and during long-term use, the surface of the screen frames is prone to adhere to a large amount of impurities such as resin, glue residue or dust, and the screen frames can only be repeated after cleaning these impurities. use. In the prior art, the impurities on the screen frame are usually cleaned with a film cleaner, and the film cleaner is a non-static film...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/16
CPCC02F9/00C02F1/24C02F3/301C02F1/46176C02F1/66C02F1/52C02F1/722C02F1/725C02F2103/16C02F2305/026C02F2301/08C02F2303/04
Inventor 董璨周梦思郑赢忠张丽芳
Owner 深圳瑞赛环保科技有限公司
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