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Treatment process of VOCs tail gas

A treatment process and tail gas technology, which is applied in the field of VOCs tail gas treatment process, can solve the problems of low treatment efficiency and unsuitable treatment, and achieve the effects of reducing energy consumption, good treatment effect, beneficial to environmental protection production and low-carbon production

Pending Publication Date: 2021-12-17
JINNENG SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the technical problems that existing VOCs treatment methods have low treatment efficiency when dealing with high-concentration VOCs tail gas and are not suitable for treating VOCs tail gas containing flammable and explosive gases, the present invention provides a treatment process for VOCs tail gas. The content of flammable and explosive gases in the tail gas of the regenerative oxidation furnace is not higher than 25% of the lower explosion limit, which ensures the safety and stability of the treatment process, and realizes the discharge of tail gas up to the standard through combustion, cooling, and alkali washing; use the standard gas to dilute Untreated VOCs tail gas does not increase the amount of tail gas treatment

Method used

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  • Treatment process of VOCs tail gas
  • Treatment process of VOCs tail gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A VOCs tail gas, the tail gas contains hydrogen, and the VOCs content is 50000mg / m 3 , can be processed by the following process steps:

[0028] (1) Mix the untreated VOCs tail gas and a part of the treated up-to-standard gas into the tail gas to be treated in the wind mixing box, and use the explosion limit detector to measure the hydrogen content and VOCs content in the tail gas to be treated respectively, according to the explosion limit detector. Results Adjust the frequency conversion of the air mixing box fan to increase the standard gas entering the mixing air box until the content of the most flammable and explosive gas in the tail gas to be treated falls below 25% of the lower explosion limit;

[0029] (2) The mixed tail gas to be treated is firstly washed in reverse contact with the third-stage spray water of the water washing tower to remove dust, water-soluble salt, water-soluble organic matter and tar, and then passes through the third-stage filtration. The...

Embodiment 2

[0037] Embodiment 2 is basically the same as embodiment 1, the only difference is that the content of VOCs in the VOCs tail gas treated in embodiment 2 is 80000mg / m 3 .

Embodiment 3

[0039] Embodiment 3 is basically the same as embodiment 1, the only difference being that the content of VOCs in the VOCs tail gas that embodiment 3 handles is 500mg / m 3 .

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Abstract

The invention relates to the technical field of tail gas treatment, in particular to a treatment process of VOCs tail gas, which comprises the following steps: (1) untreated VOCs tail gas is mixed with a part of treated standard gas in an air mixing box to form tail gas to be treated, so that the content of the most flammable and combustible gas in the tail gas to be treated is reduced to be below 25% of the lower explosion limit; (2) the mixed tail gas to be treated is pretreated and then enters a heat storage type oxidation furnace to be combusted; and (3) the combusted tail gas is subjected to cooling and alkali washing to obtain standard gas, and one part of the standard gas enters an air mixing box and is used for diluting the untreated VOCs tail gas. The treatment process disclosed by the invention is particularly suitable for treating VOCs tail gas which is complex in component, contains flammable and explosive gas and is large in concentration change, and has the advantages of high safety and stability, high treatment efficiency, small waste gas generation amount and low energy consumption.

Description

technical field [0001] The invention relates to the technical field of tail gas treatment, in particular to a process for treating VOCs tail gas. Background technique [0002] VOCs (Volatile Organic Compounds, English full name: Volatile Organic Compounds) are ubiquitous in the chemical production process. Due to their strong volatility, diffusivity and chemical toxicity, VOCs exhaust gas has a large amount of emissions and many types in the production process. It is difficult to degrade, highly toxic, and has great potential safety hazards. It seriously pollutes the environment and threatens people's health. [0003] Traditional VOCs treatment includes absorption, oxidation, combustion, photolysis, etc. Specific treatment methods include catalytic combustion, activated carbon adsorption, low temperature plasma, ultraviolet light irradiation, etc. The above treatment methods have superior characteristics for the traditional low-concentration VOCs treatment, but there are ir...

Claims

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Application Information

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IPC IPC(8): B01D53/00B01D50/00B01D53/14F23G5/02F23G5/46F23G5/50F23G7/06
CPCB01D53/1406B01D53/00F23G5/02F23G7/06F23G5/46F23G5/50B01D2258/02B01D2257/708
Inventor 刘良良张丽丽王延兵张建社
Owner JINNENG SCI & TECH