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VOCs treatment method and device

A waste gas treatment and waste gas technology, which is applied in separation methods, chemical instruments and methods, air quality improvement, etc., can solve the problems of non-standard discharge, limited use range, high initial investment and maintenance costs, water vapor sensitivity, etc.

Inactive Publication Date: 2015-11-18
广东紫方环保技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its high initial investment and maintenance costs and its sensitivity to water vapor, its scope of use is limited.
[0016] Comprehensive comparison of the above-mentioned 6 kinds of industrial VOCs waste gas treatment methods, although the treatment systems and methods are constantly updated, and the removal rate or recovery rate is continuously improved (some methods are as high as 98%), there are always residual VOCs emissions, more Can not meet the discharge standards, and some sewage treatment methods even produce secondary pollution
With the further strengthening of the government's supervision on air pollution control, the emission standards of various regions and industries have been further improved, making it difficult for the existing treatment systems and methods to adapt to the ever-increasing emission standards; therefore, there is an urgent need for a research treatment The industrial VOCs waste gas treatment method with low cost, wide application range, good treatment effect and no secondary pollution will help the country's policy on industrial VOCs control and emission reduction

Method used

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  • VOCs treatment method and device

Examples

Experimental program
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Effect test

Embodiment 1

[0046] A VOCs exhaust gas treatment method described in Embodiment 1 of the present invention, comprising:

[0047] The VOCs waste gas is collected into the micro-nano bubble purification tower 1, and the micro-nano bubble purification tower 1 washes and disperses the VOCs waste gas, and the removed VOCs waste gas enters the circulation pool 6;

[0048] VOCs exhaust gas enters the microbial purification tower 8 from the gas outlet of the micro-nano bubble purification tower 1, and the microbial purification tower 8 absorbs and decomposes the VOCs exhaust gas, and the decomposed metabolites enter the circulation pool 13;

[0049] VOCs exhaust gas is discharged from the chimney 16 through the induced draft fan 15;

[0050] The circulating fluid purification and reuse device 17 purifies the impurities and metabolites produced in the circulating pool 6 and the circulating pool 13 respectively.

Embodiment 2

[0052] like figure 1 As shown, it is a VOCs exhaust gas treatment device described in the embodiment of the present invention, including: a micro-nano bubble purification tower 1, a microbial purification tower 8, an induced draft fan 15, a chimney 16, and a circulating fluid purification and recycling device 17;

[0053] In this embodiment, the micro-nano bubble purification tower 1 is provided with an air inlet, a spray device 4, a mixed cutting layer 5, a spray device 4, and an air outlet from top to bottom; the bottom of the micro-nano bubble purification tower 1 A circulation pool 6 communicating with the micro-nano bubble purification tower 1 is provided;

[0054] In the microbial purification tower 8, an air outlet, a leaching device 10, a biological filter material 11, and an air inlet are sequentially arranged from top to bottom; the bottom of the microbial purification tower 8 is provided with a circulation pool 13 that communicates with the microbial purification to...

Embodiment 3

[0064] like figure 1 As shown, it is a VOCs exhaust gas treatment device in this application example, and the specific process is:

[0065] There is a VOCs waste gas inlet on the micro-nano bubble purification tower 1. After entering the micro-nano bubble purification tower 1, the VOCs waste gas flows from the top down. First, it is washed and pre-wetted by the upper spray system 4, and then installed in the purification tower The mixed cutting layer 5 in the middle is fully dispersed and mixed with the micro-nano-bubble circulating liquid of the lower spray device 4, and the impurities and VOCs pollutants in the exhaust gas are washed, removed and absorbed, and the down-flowing circulating liquid enters the bottom of the micro-nano-bubble purification tower 1 The circulation pool 6, and the external micro-nano bubble generator 2 continuously injects micro-nano bubbles into the circulation pool 6 through the pipeline, and the micro-nano bubble mixture is pumped by the external...

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Abstract

The invention discloses a VOCs treatment method and device. The device comprises a micro-nano bubble purifying tower (1), a microorganism purifying tower (8), an induced draft fan (15), a chimney (16) and a circulating fluid purifying and recycling device (17), wherein a gas outlet of the micro-nano bubble purifying tower (1) is connected with a gas inlet of the microorganism purifying tower (8) through an air duct; a gas outlet of the microorganism purifying tower (8), the induced draft fan (15) and the chimney (16) are connected through an air duct in sequence. According to the device, the circulating fluid purifying and recycling device is used for treating and purifying circulating fluid containing more VOCs generated by the micro-nano bubble purifying tower and the microorganism purifying tower, the circulating fluid is self supplied and can be repeatedly utilized, and the limit condition that the monomer micro-nano bubble purifying tower and the microorganism purifying tower are used for processing secondary pollution of liquid waste generated by the system can be greatly purified, so that the mode that the micro-nano bubble purifying tower and the microorganism are combined for processing VOCs can be widely used.

Description

technical field [0001] The invention relates to a VOCs waste gas treatment method and device. Background technique [0002] As we all know, PM2.5 (fine particulate matter) and smog weather have increasingly serious impacts on people's lives and health, and VOCs (volatile organic compounds) are one of the main factors that make the concentration of PM2.5 abnormal. The total emission of VOCs has reached more than 20 million tons per year. In various occasions where organic solvents are used, such as painting, printing, metal degreasing and degreasing, adhesives, pharmaceuticals, plastics, rubber, petroleum and other processing and production sites, volatile organic compounds (VOCs for short) are polluting the air. [0003] The VOCs emitted have the characteristics of large emission, high concentration, and high toxicity; the treatment methods of industrial VOCs waste gas mainly include: 1. Absorption method, 2. Photocatalytic oxidation method, 3. Biological method, 4. Adsorpt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/84B01D53/44
CPCY02A50/20
Inventor 王景华龚敏刘小燕黄欣燕谭永桥
Owner 广东紫方环保技术有限公司
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