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Catalytic purification treatment method of voc-containing exhaust gas

A technology for catalytic purification and treatment methods, applied in gas treatment, chemical instruments and methods, separation methods, etc., can solve the problems of large investment and poor safety, and achieve the effect of reducing investment, high safety and good technical effect

Active Publication Date: 2020-07-31
上海汉克威自动化科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is the problem of poor safety and large investment in the prior art. It provides a new catalytic purification treatment method for waste gas containing VOC, which has the advantages of better safety and less investment

Method used

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  • Catalytic purification treatment method of voc-containing exhaust gas
  • Catalytic purification treatment method of voc-containing exhaust gas

Examples

Experimental program
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Effect test

Embodiment 1

[0022] A kind of catalytic purification device for VOC treatment, its process is shown in figure 1 , during device start-up, 50m 3 / h of VOCs exhaust gas, in which the concentration of formaldehyde is 3500mg / m 3 , the concentration of other VOCs components is 1200mg / m 3 , the temperature is 60°C, and the pressure is normal pressure. The fan boosts the pressure (1) to 5kpa and enters the heat exchanger (2). The heat exchanger is a shell-and-tube heat exchanger with a size of DN50*1200 and a heat transfer area of ​​1.6m 2 , because the whole device is a cold standby during the start-up process, the exhaust gas exits the heat exchanger without temperature rise, and the exhaust gas enters the low-temperature catalytic oxidation reactor (4), and the reactor is filled with a low-temperature formaldehyde catalyst, which is CeO supported on nano-alloy particles 2 Carrier, containing Ru, Rh, Pt, Pd precious metals, in terms of mass fraction, the content of Ru is 0.25%, the content of...

Embodiment 2

[0026] A kind of catalytic purification device for VOC treatment, its process is shown in figure 1 , during device start-up, 50m 3 / h of VOCs exhaust gas, in which the concentration of formaldehyde is 3000mg / m 3 , the concentration of other VOCs components is 80mg / m 3 , the temperature is 30°C, the pressure is 100kpaA, the fan boosts the pressure (1) to 5kpa and enters the heat exchanger (2), the heat exchanger is a shell-and-tube heat exchanger, the size is DN50*1200, and the heat exchange area is 1.6m 2 , because the whole device is cold standby during the start-up process, the exhaust gas exits the heat exchanger without temperature rise, and the exhaust gas enters the low-temperature catalytic oxidation reactor (4), and the reactor is filled with a low-temperature catalyst, which is CeO supported on nano-alloy particles 2 Carrier, containing Ru, Rh, Pt, Pd precious metals, in terms of mass fraction, the content of Ru is 0.25%, the content of Rh is 0.5%, the content of Pt...

Embodiment 3

[0030] A kind of catalytic purification device for VOC treatment, its process is shown in figure 1 , during device start-up, 50m 3 / h of VOCs exhaust gas, in which the concentration of formaldehyde is 6000mg / m 3 , the concentration of other VOCs components is 80mg / m 3 , the temperature is 30°C, the pressure is 100kpaA, the fan boosts the pressure (1) to 5kpa and enters the heat exchanger (2). The heat exchanger is a shell-and-tube heat exchanger with a size of DN50*1200mm and a heat transfer area of ​​1.6m 2 , because the whole device is cold standby during the start-up process, the exhaust gas exits the heat exchanger without temperature rise, and the exhaust gas enters the low-temperature catalytic oxidation reactor (4), and the reactor is filled with a low-temperature catalyst, which is CeO supported on nano-alloy particles 2 Carrier, containing Ru, Rh, Pt, Pd precious metals, in terms of mass fraction, the content of Ru is 0.25%, the content of Rh is 0.5%, the content of...

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Abstract

The invention relates to a method for catalytic purification treatment of VOC-containing waste gas to mainly solve the problems of poor safety and large investment in the prior art. According to the invention, by adopting the method for catalytic purification treatment of the VOC-containing waste gas, the VOC-containing waste gas enters a heat exchanger after being blown by a fan, and the heated VOC-containing waste gas enters a catalytic oxidation reactor; in addition, a low-temperature catalytic oxidation reactor is arranged in parallel with the catalytic oxidation reactor, and outlet streams of the catalytic oxidation reactor and the low-temperature catalytic oxidation reactor are cooled by the heat exchanger and then discharged up to standard, wherein during the start-up of a device, the whole device is preheated by using the low-temperature catalytic oxidation reactor through valve switching, and during normal use, the low-temperature catalytic oxidation reactor is isolated from asystem through valve switching. The technical scheme that no electric heater is arranged on a pipeline between the heat exchanger and a catalytic oxidizer better solves the problems, and can be usedin the treatment of the VOC waste gas.

Description

technical field [0001] The invention relates to a catalytic purification treatment method for VOC-containing waste gas. Background technique [0002] Volatile Organic Compounds (Volatile Organic Compounds referred to as VOCs) refer to organic compounds with a boiling point of 50-260°C under normal pressure. According to their chemical structure, they can be divided into aromatic hydrocarbons (benzene, toluene, xylene), ketones, aldehydes, Amines, halogenated, unsaturated hydrocarbons, etc. VOCs are harmful to human health and living environment, and have a foul smell. If people inhale low-concentration organic waste gas for a long time, they will cause chronic respiratory diseases such as cough, chest tightness, asthma and even emphysema. They are currently recognized as strong carcinogens. In September 2013, the State Council issued the "Action Plan for the Prevention and Control of Air Pollution" to promote the control of volatile organic compound pollution. Implement co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/86B01D53/44B01D53/72
CPCB01D53/8668B01D53/8687B01D2255/102B01D2255/1021B01D2255/1023B01D2255/1025B01D2257/708
Inventor 马金鹏唐明德
Owner 上海汉克威自动化科技有限公司
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