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Treatment device and method for coating waste gas

A waste gas and coating technology, which is applied in separation methods, chemical instruments and methods, and dispersed particle separation, can solve the problems of low purification rate and low recovery rate, improve the recovery rate of absorbents, reduce operating costs, and equipment investment low effect

Inactive Publication Date: 2015-07-01
JIANGSU VICTORIOUS MATERIAL TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of low recovery rate and low purification rate in the prior art, and provide a treatment device and treatment method for coating waste gas. The film absorption method is used to treat coating waste gas, which can not only purify the air, but also Efficient recovery of solvents, reducing costs and improving economic benefits

Method used

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  • Treatment device and method for coating waste gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A coating exhaust gas treatment method, comprising the following steps:

[0029] (1) Add absorbent silicone oil at a temperature of 20°C to the liquid storage tank 6;

[0030] (2) The absorbent silicone oil in the liquid storage tank 6 enters the membrane absorber 4 from the shell side inlet of the membrane absorber 4 through the constant flow pump 7 through the liquid flow controller 8; the membrane module in the membrane absorber 4 adopts Hydrophobic polypropylene hollow fiber membrane, the filling factor is 0.4, the porosity is 0.5, and the pressure difference between the gas-liquid two-phase on both sides of the membrane is 0.03Mpa;

[0031] (3) Set the concentration to 300mg / m 3 , the flow rate is 10m 3 / h, the coating exhaust gas at a temperature of 40°C is cooled by the filter 1, and then enters the tube of the membrane absorber 4 by the fan 2 through the gas flow controller 3, and the exhaust gas passes through the fiber membrane and is absorbed by th...

Embodiment 2

[0035] A coating exhaust gas treatment method, comprising the following steps:

[0036] (1) Add absorbent diesel-water at a temperature of 25°C into the liquid storage tank 6;

[0037] (2) The absorbent diesel-water in the liquid storage tank 6 enters the membrane absorber 4 from the shell side inlet of the membrane absorber 4 through the constant flow pump 7 through the liquid flow controller 8; the membrane module in the membrane absorber 4 adopts Hydrophobic polypropylene hollow fiber membrane, the filling factor is 0.4, the porosity is 0.5, and the pressure difference of gas-liquid two-phase on both sides of the membrane is 0.005Mpa;

[0038] (3) Set the concentration to 100mg / m 3 , the flow rate is 8m 3 / h, the coating exhaust gas at a temperature of 20°C is cooled by the filter 1, and then enters the tube of the membrane absorber 4 by the fan 2 through the gas flow controller 3, and the exhaust gas passes through the fiber membrane and is absorbed by the absorbent ...

Embodiment 3

[0042] A coating exhaust gas treatment method, comprising the following steps:

[0043] (1) Add F-BDO absorbent and SD-VOC at a temperature of 10°C to the liquid storage tank 6 polymer absorbent;

[0044] (2) The F-BDO absorbent and SD-VOC in the storage tank 6 The polymer absorbent enters the membrane absorber 4 from the shell side inlet of the membrane absorber 4 through the constant flow pump 7 through the liquid flow controller 8; the membrane module in the membrane absorber 4 adopts a hydrophobic polypropylene hollow fiber membrane, and the filling factor is 0.4, the porosity is 0.5, and the pressure difference between the gas-liquid two-phase on both sides of the membrane is 0.01Mpa; the membrane absorber 4 adopts two stages in series;

[0045] (3) Set the concentration to 50mg / m 3 , the flow rate is 6m 3 / h, the coating exhaust gas at a temperature of 30°C is cooled by the filter 1, and then enters the tube of the membrane absorber 4 by the fan 2 through the g...

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Abstract

The invention discloses a treatment device and method for coating waste gas. The treatment device comprises a filter, a fan, a gas-flow controller, a membrane absorber, a regeneration tower, a liquid storage tank, a constant-flow pump and a liquid-flow controller. The treatment method comprises the following steps: an absorbing agent enters a membrane-absorber shell pass by the constant-flow pump through the liquid-flow controller, and the waste gas enters a tube pass of the membrane absorber by virtue of the fan through the gas-flow controller and is absorbed by the absorbing agent through a fiber membrane in the membrane absorber; absorbing liquid absorbing the waste gas enters the regeneration tower for regeneration and separation, the separated absorbing liquid returns into the liquid storage tank for circulating use, and the separated organic solvent is recovered; standard gas after absorption by the absorbing agent is exhausted into the atmosphere from the membrane absorber. The treatment device and the treatment method disclosed by the invention have the advantages that the amount of the consumed absorbing agent is 60% of the consuming amount of a common absorbing tower, the recovery rate of the absorbing agent can reach 90% or above, the purification rate of the coating waste gas is up to 95% and the operation is simple.

Description

technical field [0001] The invention relates to a waste gas treatment device and a treatment method, in particular to a coating waste gas treatment device and a treatment method, which belong to the field of purifying gas by using membrane absorption technology. Background technique [0002] In recent years, my country's coating industry has developed rapidly, but the coating production process is accompanied by a large amount of volatile organic waste gas discharge, and the annual discharge of volatile organic waste gas to the atmosphere is gradually increasing, and the discharge volume is large and the discharge range is wide. Volatile organic waste gases generated during the coating production process include esters, alcohols, ketones and other waste gases, which are teratogenic, carcinogenic, and mutagenic to the human body. If they are not recycled and treated, they will not only pollute the environment, but also cause waste of resources. What's more serious is that it ...

Claims

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Application Information

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IPC IPC(8): B01D53/18B01D53/14B01D53/22
Inventor 卫旺仓蓉姚志英
Owner JIANGSU VICTORIOUS MATERIAL TECH
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