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VOCs waste gas treatment system and method

A technology for waste gas treatment and waste gas pipelines, which is applied in gas treatment, separation methods, chemical instruments and methods, etc., can solve the problems of reducing reaction space velocity, increasing waste gas residence time, increasing catalyst dosage, etc., achieving low energy consumption and solving problems. Effects of high temperature flash explosion risk

Pending Publication Date: 2021-07-23
HANGZHOU PUYU TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to ensure compliance with emission standards, it is necessary to reduce the reaction space velocity and increase the residence time of exhaust gas in the catalyst, which will eventually lead to an increase in the amount of catalyst and an increase in the investment cost of catalytic oxidation treatment of exhaust gas

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The VOCs waste gas treatment system of the embodiment of the present invention, the VOCs waste gas treatment system includes:

[0024] The first heat exchanger, the circulating fan, the heater and the first catalytic reactor are all prior art;

[0025] The second heat exchanger, the second heat exchanger is arranged upstream of the circulation fan, the waste gas pipeline and the air pipeline pass through the second heat exchanger, and then send to the circulation fan;

[0026] The second catalytic reactor, the input end of the second catalytic reactor communicates with the outlet of the first catalytic reactor, and the output end communicates with the second heat exchanger; the second catalytic reactor is connected to the first catalytic reactor a pipe between the catalytic reactor and the first heat exchanger;

[0027] A gas pipeline, one end of the gas pipeline communicates with the first heat exchanger, receives the gas output from the first catalytic converter and ...

Embodiment 2

[0037] The VOCs waste gas treatment system of the embodiment of the present invention is different from Embodiment 1 in that:

[0038] In the treatment system, the second catalytic reactor is arranged between the first catalytic reactor and the first heat exchanger, and the output gas is sent to the second heat exchanger after passing through the first heat exchanger.

[0039] In the treatment method, step (A3) is: the second gas is sent to the second catalytic reactor, and then sent to the second heat exchanger after exchanging heat in the first heat exchanger;

[0040] The second gas is sent to the second catalytic reactor after being heat exchanged by the first heat exchanger, and then sent to the second heat exchanger for cooling and output.

Embodiment 3

[0042] The VOCs waste gas treatment system of the embodiment of the present invention is different from Embodiment 1 in that:

[0043] 1. In the treatment system, the second catalytic reactor is arranged between the first heat exchanger and the second heat exchanger, and part of the gas output from the first catalytic reactor passes through the first heat exchanger The second catalytic reactor is sent after the device;

[0044] 2. In the treatment method, step (A3) is: the gas output from the first catalytic reactor is divided into two paths, the first path of gas is sent to the first heat exchanger, and then sent to the circulation fan.

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PUM

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Abstract

The invention provides a VOCs waste gas treatment system and method. The VOCs waste gas treatment system comprises a first heat exchanger, a circulating fan, a heater and a first catalytic reactor. A second heat exchanger is arranged at the upstream of the circulating fan, and a waste gas pipeline and an air pipeline pass through the second heat exchanger and then lead to the circulating fan. The input end of a second catalytic reactor is communicated with the outlet of the first catalytic reactor, and the output end of the second catalytic reactor is communicated with the second heat exchanger. One end of a gas pipeline is communicated with the first heat exchanger and receives gas output by the first catalytic reactor and passing through the first heat exchanger, and the other end of the gas pipeline is communicated with the circulating fan. The system and the method have the advantages of good treatment effect, low cost and the like.

Description

technical field [0001] The invention relates to waste gas treatment, in particular to a VOCs waste gas treatment system and method. Background technique [0002] VOCs (volatile organic compounds) refer to organic compounds with a saturated vapor pressure greater than 133.32Pa at normal temperature and a boiling point below 50-260°C at normal pressure, or any organic solid or liquid that can volatilize at normal temperature and pressure. [0003] For the treatment of high-concentration and low-flow VOCs exhaust gas, the domestic currently dilutes the concentration of VOCs exhaust gas entering the reactor by supplementing air or other inert gases. Therefore, in the process of VOCs treatment, under the same reaction space velocity, it not only leads to an increase in the amount of catalyst, but also increases the power and fuel consumption in the transportation and heating links, which ultimately leads to an increase in investment costs and operating costs. [0004] In the rel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/86B01D53/44
CPCB01D53/869B01D53/8687B01D2257/708
Inventor 胡家肃吴晶王巍
Owner HANGZHOU PUYU TECH DEV CO LTD