Co-processing method of automobile disassembly/repair wastewater and low-rank coal fine slime

A car dismantling and co-processing technology, which is applied in the wastewater treatment of vehicle washing facilities, chemical instruments and methods, multi-stage water/sewage treatment, etc., can solve the problems of difficult to use, low economic value, etc. Inexpensive, acid-enhancing effect

Active Publication Date: 2021-12-21
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large number of low-rank coal slimes with high ash and low calorific value are dumped due to their low economic value and difficulty in utilization

Method used

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  • Co-processing method of automobile disassembly/repair wastewater and low-rank coal fine slime

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Carry out particle size screening and particle size analysis of low-rank coal fine slime by sampling method, low-rank coal fine slime should meet the following requirements: use sieve to screen low-rank coal fine slime to ensure that the particle size is below the specified 100 μm, and When the sieve content of the specified particle size does not exceed 20% of the total amount, the particle size of the low-rank coal fine slime is considered qualified;

[0042] (2) Throwing sulfuric acid solution with a concentration of 2mol / L and low-rank coal fine coal slime into the mixing tank, the mass concentration of low-rank coal fine coal slime is 10%, and stirring for 3 hours;

[0043] (3) After the stirring is completed, the fine coal slime-sulfuric acid mixture is passed into a plate and frame filter press to filter out moisture to obtain a low-rank coal fine slime adsorbent;

[0044] (4) Put the low-rank coal fine slime adsorbent and automobile dismantling / repair wastew...

Embodiment 2

[0049] (1) Carry out particle size screening and particle size analysis of low-rank coal fine slime by sampling method, low-rank coal fine slime should meet the following requirements: use sieve to screen low-rank coal fine slime to ensure that the particle size is below the specified 100 μm, and When the sieve content of the specified particle size does not exceed 20% of the total amount, the particle size of the low-rank coal fine slime is considered qualified;

[0050] (2) Throwing sulfuric acid solution with a concentration of 2mol / L and low-rank coal fine coal slime into the mixing tank, the mass concentration of low-rank coal fine coal slime is 10%, and stirring for 3 hours;

[0051] (3) After the stirring is completed, the fine coal slime-sulfuric acid mixture is passed into a plate and frame filter press to filter out moisture to obtain a low-rank coal fine slime adsorbent;

[0052] (4) Put the low-rank coal fine slime adsorbent and automobile dismantling / repair wastew...

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Abstract

The invention discloses a co-processing method of automobile disassembly / repair wastewater and low-rank coal fine slime. The co-processing method comprises the following steps: carrying out particle size screening and particle size analysis on the low-rank coal fine slime; putting the low-rank coal fine slime and a sulfuric acid solution into a stirring barrel, stirring together, and carrying out acid pickling activation modification; dehydrating the low-rank coal fine slime-sulfuric acid solution mixture by using a plate-and-frame filter press to obtain a low-rank coal fine slime adsorbent; putting the automobile disassembling / repairing wastewater and a low-rank coal fine slime adsorbent into a stirring barrel, stirring, adsorbing pollutants in the automobile disassembling / repairing wastewater, and uniformly mixing to obtain slime water; putting the slime water into flotation equipment for foam flotation, and adding a foaming agent into the flotation equipment; dehydrating a flotation overflow product through a plate-and-frame filter press to obtain a clean coal slime product ; and filtering a flotation underflow product through a pressure filter to obtain a tailing product and purified water. According to the invention, the cooperative treatment of two types of polluted waste materials, namely the automobile disassembly / repair wastewater and the waste fine coal slime, is realized.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment, and relates to a co-processing method of automobile dismantling / repair waste water and waste fine coal slime. Background technique [0002] The recycling and dismantling industry of scrapped automobiles and the automobile engine maintenance industry are important industries in my country's current automobile industry and resource recovery. During the process of dismantling end-of-life vehicles or repairing vehicle engines, a large amount of washing waste liquid and waste water will be generated. There are nearly 500 dismantling enterprises in the country, with a daily water treatment volume of about 1.5-3 million t / d and an annual sewage discharge of 540-1020 million tons. This type of wastewater contains a variety of pollutants, including various hydrocarbons such as alkanes and polycyclic aromatic hydrocarbons, various refrigerants, washing liquids, various types of organic elect...

Claims

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Application Information

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IPC IPC(8): C02F9/08C02F1/24C02F1/28C02F103/44
CPCC02F9/00C02F1/24C02F1/28C02F2103/44
Inventor廖寅飞杨哲安茂燕刘泽晨曹亦俊马子龙
OwnerCHINA UNIV OF MINING & TECH