System and method for disposing large blast capacity low concentration mixed harmful gas

A harmful gas and concentration technology, applied in chemical instruments and methods, combustion methods, gas treatment, etc., can solve the problems of single type of treatment and inability to purify multiple types of harmful gases at the same time, so as to ensure continuous operation and avoid secondary pollution Effect

Inactive Publication Date: 2018-06-05
上海穗杉实业股份有限公司
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  • Application Information

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Problems solved by technology

[0005] Aiming at the problems in the prior art that the treatment types are single and cannot purify multiple types of harmful gases at the same time, the present invention provides a system and method for treating mixed harmful gases with large air volume and low concentration

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  • System and method for disposing large blast capacity low concentration mixed harmful gas

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Embodiment 1

[0081] This embodiment provides a system for processing large air volume and low concentration mixed harmful gas. The schematic diagram of the device connection is as follows figure 1 As shown, the system includes a purification regeneration adsorption device 3, a catalytic combustion purification device 6 and a terminal purification adsorption device 7 connected in sequence, the outlet of the purification regeneration adsorption device 3 is divided into two branches, one is connected to the exhaust port, One is connected with the inlet of the catalytic combustion purification device 6 .

[0082] Wherein, the purification regeneration adsorption device 3 includes a first purification regeneration adsorption device 31 and a second purification regeneration adsorption device 32 arranged in parallel, and a heating device is installed in the purification regeneration adsorption device 3 .

[0083] The system also includes a filter device 2 , the outlet of the filter device 2 is co...

Embodiment 2

[0088] This embodiment provides a system for treating mixed harmful gases with large air volume and low concentration. The system refers to the system in Embodiment 1, and the only difference is that there is only one purification and regeneration adsorption device 3 .

Embodiment 3

[0090] This embodiment provides a method for dealing with large air volume and low concentration mixed harmful gases, the mixed harmful gases include ammonia, formaldehyde, hydrogen sulfide and n-heptane, the flow velocity is 0.4m / s, and the concentration of harmful gases is ammonia 5ppm, formaldehyde 0.29ppm, hydrogen sulfide 0.13ppm and n-heptane 4.5ppm.

[0091] Described method adopts the system in embodiment 1 to carry out, and described method comprises the following steps:

[0092] (a) After the above-mentioned mixed harmful gas is first filtered, then adsorbed with a uniformly mixed molecular sieve adsorbent, the molecular sieves include mordenite molecular sieves, ZSM-5 molecular sieves and alumina molecular sieves, and their corresponding mass ratios are 1 :8:12, after the adsorption is saturated, the temperature is 125°C and the vacuum degree is -0.07MPa, and the temperature is 125°C and the vacuum degree is -0.07MPa. Alternately, get concentrated harmful gas;

[00...

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Abstract

The invention provides a system and a method for disposing large blast capacity low concentration mixed harmful gas. The system comprises a purification, regeneration and adsorption device, a catalytic combustion and purification device and a tail end purification and adsorption device connected successively. By combining the harmful gas concentration and removal technology, the catalytic combustion technology and the tail end purification technology, the problem that the harmful gas which is low in concentration is hard to dispose is solved in an assisted manner by means of adsorption and desportion of the harmful gas. By proportioning various adsorbents and the harmful gas correspondingly and reasonably, the problem that various types of harmful gas cannot be purified at the same time issolved; the tail end purification technology avoids generation of secondary pollution. According to the system and the method provided by the invention, the mixed harmful gas can be efficiently purified, and the concentration of the harmful gas can be reduced to be below the concentration of national environment-friendly demand.

Description

technical field [0001] The invention belongs to the technical field of gas purification, and relates to a system and method for treating mixed harmful gases with large air volume and low concentration. Background technique [0002] With the rapid development of my country's chemical industry and machinery manufacturing industry, there are more and more harmful gas emissions with large air volume and low concentration, and there are many types of gas emissions. These pollutants are not only harmful to the human body, some are carcinogens, and a large amount of discharge will have a serious impact on the local area environment, which is one of the reasons for the formation of atmospheric photochemical smog. However, some of these substances have poor water solubility and strong volatility, and some have stable chemical structures and are not easy to degrade, which will bring great difficulties to purification. [0003] At present, adsorption-desorption method, catalytic combu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/02F23G7/07
CPCB01D53/02B01D2253/108B01D2253/116B01D2259/40088B01D2259/414F23G7/07
Inventor 蔡坤川顾修筑王晨杨家宾干宇豪彭名明
Owner 上海穗杉实业股份有限公司
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