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Device and method for treating organic waste gas through synergistic catalysis of plasma

A plasma and organic waste gas technology, applied in chemical instruments and methods, gas treatment, separation methods, etc., can solve problems such as changes in waste gas components, energy waste, and increased operating costs, so as to avoid energy waste and secondary pollution , the effect of shortening the contact time

Pending Publication Date: 2017-12-08
HUATIAN ENG & TECH CORP MCC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hours of operation of all emission sources are not exactly the same, which causes the composition of the exhaust gas entering the treatment unit to change over time
The operating parameters of most existing plasma organic waste gas treatment devices will not automatically change with the change of waste gas components, which will cause waste of energy in the process of waste gas treatment, thereby further increasing the operating cost

Method used

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  • Device and method for treating organic waste gas through synergistic catalysis of plasma

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The exhaust gas enters the exhaust gas inlet 1 and is detected by the gas analyzer 3. The concentration of HCl in the exhaust gas is 100ppm, and the concentration of TVOC is 500ppm. The gas analysis instrument 3 sends a signal to control the electric valve 9 to close, and the opening direction of the electric three-way valve 3 is adjusted to a suitable position.

[0039] The exhaust gas enters the absorption tower 4 through the first electric three-way valve 2. Absorption tower 4 is a spray absorption tower, and the absorption liquid is 2% NaHCO 3 solution. After the waste gas is purified by the absorption tower 4, it enters the filter device 6 to remove solid particles and liquid droplets, and at the same time, the gaseous water content in the waste gas decreases. After that, the exhaust gas enters the plasma reactor 7 through the second electric three-way valve 2, enters the catalytic reactor 11 after being activated and partially oxidized, and finally exits the dev...

Embodiment 2

[0041] The exhaust gas enters the exhaust gas inlet 2 and is detected by the gas analysis instrument 3. The exhaust gas does not contain acidic exhaust gas such as HCl or NH 3For alkaline waste gas, the TVOC concentration is 500ppm. The gas analysis instrument 3 sends a signal to control the electric valve 9 to close, and the opening direction of the electric three-way valve 3 is adjusted to a suitable position. The exhaust gas enters the parallel bypass 5 of the absorption tower through the first electric three-way valve 2, and then enters the plasma reactor 7 through the second electric three-way valve 2 after removing particulate matter through the filter device 6. After being activated and partially oxidized, the waste gas enters the catalytic reactor 11 and finally exits the device through the waste gas outlet 13 . Detected by the gas analyzer 3, the TVOC concentration at the waste gas outlet 13 drops to 45ppm.

Embodiment 3

[0043] The exhaust gas enters the exhaust gas inlet 2 and is detected by the gas analysis instrument 3. The NH in the exhaust gas 3 The concentration is 80ppm, the TVOC concentration is 150ppm, the gas analysis instrument 3 sends a signal to control the opening of the electric valve 9, and the opening direction of the electric three-way valve 3 is adjusted to a suitable position. The exhaust gas enters the absorption tower 4 through the first electric three-way valve 2, and the absorption tower 4 is a spray absorption tower, and the absorption liquid used is 1% H 2 SO 4 solution. After the waste gas is purified by the absorption tower 4, it enters the filter device 6 to remove solid particles and liquid droplets, and the gaseous water content in the waste gas decreases. After that, the exhaust gas enters the parallel bypass 8 of the plasma reactor through the second electric three-way valve 2 . At the same time, the outside air enters the plasma reactor 7 from the air bypas...

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Abstract

The invention discloses a device and method for treating organic waste gas through synergistic catalysis of plasma. The device comprises an absorbing tower, a plasma reactor, a catalytic reactor and a gas analysis instrument, wherein the absorbing tower, a plasma reactor, a catalytic reactor are sequentially connected; a controlled three-way valve is arranged at a gas inlet of the absorbing tower and is used for respectively communicating a waste gas inlet with gas inlet of the absorbing tower or the waste gas inlet with a bypath of the absorbing tower; a controlled three-way valve is arranged at a gas inlet of the plasma reactor and is used for respectively communicating a gas outlet of the absorbing tower with a gas inlet of the plasma reactor or the gas outlet of the absorbing tower with a bypath of the plasma reactor; a detection point is arranged at a waste gas inlet, the gas analysis instrument is used for detecting waste gas in real time through the detection point, outputting control signals to the controlled three-way valves according to a detection result and controlling the switching of the controlled three-way valve. According to the device, the operation states of an airflow path and each processing unit are automatically controlled according to waste gas components, so that the unnecessary energy wasting is avoided.

Description

technical field [0001] The invention relates to the technical field of organic waste gas purification, in particular to a method and a device for plasma cooperative catalytic treatment of organic waste gas. Background technique [0002] Organic waste gas mostly comes from petrochemical, pharmaceutical, rubber, electronics, printing, spraying and other industries, and generally has the characteristics of complex components, flammable, explosive, toxic, and difficult to deal with. The treatment methods of organic waste gas include condensation method, absorption method, adsorption method, thermal incineration method, catalytic oxidation method, plasma method, biological method, etc. These methods have their own concentration ranges. Due to the complexity of the composition, organic waste gas is generally treated with the combination of the above methods. [0003] The plasma method has the advantages of high removal efficiency and convenient operation, but when treating some p...

Claims

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Application Information

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IPC IPC(8): B01D53/14B01D53/18B01D53/44B01D53/75B01D53/86
CPCB01D53/14B01D53/1456B01D53/18B01D53/30B01D53/44B01D53/75B01D53/8687B01D2259/818B01D2257/708B01D2255/2065B01D2255/2063B01D2255/70B01D2255/20738B01D2255/2073B01D2255/20715B01D2255/20761B01D2255/20753B01D2255/20746B01D2255/20707B01D2255/2092B01D2255/30Y02A50/20
Inventor 范维义李启超安忠义
Owner HUATIAN ENG & TECH CORP MCC
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