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Treatment method and system of polyester polyol waste gas

A technology of polyester polyol and treatment method, which is applied in the direction of separation method, chemical instrument and method, and separation of dispersed particles, so as to achieve the effect of reducing COD concentration and difficulty

Inactive Publication Date: 2018-04-20
北京科跃联创环境工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Based on this, it is necessary to provide a new polyester polyol waste gas treatment method and system for the problem of waste gas treatment of polyester polyol production in the traditional technology

Method used

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  • Treatment method and system of polyester polyol waste gas
  • Treatment method and system of polyester polyol waste gas
  • Treatment method and system of polyester polyol waste gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] From the waste gas rich in organic matter from the polyester polyol reactor, the gas phase related information of the waste gas is shown in Table 1 (not limited to the present invention):

[0059] Table 1 is from the gas phase parameter of the waste gas of polyester polyol reactor

[0060]

[0061] The exhaust gas enters the first stage fractionation treatment device from the polyester polyol reactor. The first-stage fractionation treatment device is a fractionation tower. The fractionation tower is equipped with 10 bubble-cap trays from bottom to top, and 5-meter-high regular wire mesh packing. The waste gas is separated by vapor-liquid mass transfer in the fractionation tower to make ethylene glycol, etc. Return from the reflux pipe of the tower kettle to the polyester polyol reaction kettle for recycling, and at the same time, the low-boiling point by-products in the waste gas are extracted from the top waste liquid of the fractionating tower.

[0062] The fracti...

Embodiment 2

[0066] In the present embodiment, the volume of the polyester polyol reactor is 10 cubic meters. The waste gas organic matter recovery system facilities connected to the top of the condenser or fractionation tower, including the tower body system, tower bottom system and tower top system.

[0067] The exhaust gas from the top of the condenser or fractionation tower, the gas phase information of the exhaust gas is shown in Table 2 and Table 3:

[0068] Table 2 is from the gas phase parameter of the waste gas of polyester polyol reactor

[0069] temperature range, ℃

160-170

170-180

180-190

190-200

200-210

time, h

0.8

1

1.2

1.5

1.5

Water output, L

80

160

240

360

400

Water output rate, L / h

100

160

200

240

268

COD value, x10 4 ppm

4.66

10.43

16.2

20.1

[0070] Table 3 is from the gas phase parameter of the waste gas of polyester polyol reactor

[0071] ...

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Abstract

The invention provides a treatment method of polyester polyol waste gas, wherein the treatment method includes the following steps: S100, primary fractionation treatment: polyester polyol waste gas from a polyester polyol reaction kettle is subjected to primary fractionation treatment, a first fractionation product and first residual waste gas are obtained, and the first fractionation product flows back to the polyester polyol reaction kettle; and S200, secondary fractionation treatment: the first residual waste gas is subjected to secondary fractionation treatment, and a second fractionationproduct is obtained. The invention also provides a treatment system of polyester polyol waste gas. The waste gas treatment method of the polyester polyol waste gas provided by the invention utilizes afractionation principle, useful substances in the waste gas are recycled and reused through multistage fractionation, organic generation raw materials in the produced waste gas are separated and recycled to the greatest extent and are subjected to resource utilization to be supplemented into the reaction kettle, and at the same time, the concentration content of COD in produced waste water is reduced greatly.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a method for treating polyester polyol waste gas. Background technique [0002] Polyurethane elastomer is a variety of polyurethane synthetic materials. Because its structure has two segments, soft and hard, it can be molecularly designed to endow the material with excellent properties such as high strength, good toughness, wear resistance, and oil resistance. It has both The high elasticity of rubber has the rigidity of plastic, so it is called "wear-resistant rubber". Its physical and mechanical properties are good, and it has been widely used in manufacturing, petroleum industry, mining industry, electrical appliances and instrumentation industry, leather and shoemaking industry, construction industry, medical and health care and sports goods manufacturing and other fields. [0003] As one of the important raw materials of polyurethane elastomer, polyester po...

Claims

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Application Information

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IPC IPC(8): B01D53/00
CPCB01D53/005
Inventor 屈超杨旭东
Owner 北京科跃联创环境工程有限公司
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