Device and method for purifying waste gas containing VOCs by membrane aeration biological membrane reactor

A membrane aeration biofilm and biological reaction technology is applied in the field of membrane aeration biofilm reactors to purify waste gas containing VOCs, which can solve the problems of easy blockage of filter towers, low waste gas removal rate, etc., and achieve high VOCs removal. efficiency, simple device structure, and the effect of reducing processing costs

Inactive Publication Date: 2018-01-19
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of low waste gas removal rate, easy blockage of filter tower and high processing cost in the prior art, and provide a device for purifying waste gas containing VOCs by membrane aerated biofilm reactor

Method used

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  • Device and method for purifying waste gas containing VOCs by membrane aeration biological membrane reactor
  • Device and method for purifying waste gas containing VOCs by membrane aeration biological membrane reactor
  • Device and method for purifying waste gas containing VOCs by membrane aeration biological membrane reactor

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Embodiment 1

[0039] A method for purifying waste gas containing VOCs by a membrane aerated biofilm reactor, comprising the steps of:

[0040] (1) A device for purifying waste gas containing VOCs using a membrane aerated biofilm reactor;

[0041] (2) bio-filming the outer surface of the hollow fiber membrane module 2 provided in the bioreaction module 14;

[0042] (3) Three bioreaction modules 14 are selected, and every two bioreaction modules are connected by a flange, and the bioreaction module is connected with the purified gas collection device 7 and the liquid storage base 6 by a flange;

[0043] (4) start the nutrient solution circulating pump 3; the nutrient solution spraying device sprays the nutrient solution;

[0044] (5) Divide the waste gas containing VOCs into two streams after passing through the waste gas flow meter 15, and one stream passes through three membrane aeration inlet pipes 10 respectively, and then enters the inside of the hollow fiber membrane; organic pollutant...

Embodiment 2

[0054] A method for purifying waste gas containing VOCs by a membrane aerated biofilm reactor, comprising the steps of:

[0055] Step (1)-step (7) is the same as embodiment 1 step (1)-step (7);

[0056] The nutrient solution spraying device is a nozzle-type distributor, and the small holes on the nozzle-type distributor are arranged in concentric circles, and the diameter of the small holes is 5-10mm;

[0057] The diameter of the cylindrical biological reaction tower body 1 is 1000mm, the height of the cylindrical biological reaction tower body 1 is 1000mm, and the height of the hollow fiber module module is 800mm. The filling density of the hollow fiber module is 50%. 3 biological reaction modules connected in series,

[0058] The exhaust gas flow rate containing xylene is 10‐20m 3 / s, the concentration is 800‐1000mg / m 3 .

[0059] The removal rate of xylene is 90%.

Embodiment 3

[0061] A method for purifying waste gas containing VOCs by a membrane aerated biofilm reactor, comprising the steps of:

[0062] Step (1)-step (7) is the same as embodiment 1 step (1)-step (7);

[0063] The nutrient solution spraying device is a nozzle-type distributor, and the small holes on the nozzle-type distributor are arranged in concentric circles, and the diameter of the small holes is 5-10mm;

[0064] The diameter of the cylindrical biological reaction tower body 1 is 1000mm, the height of the cylindrical biological reaction tower body 1 is 1200mm, and the height of the hollow fiber module module is 1000mm. The filling density of the hollow fiber module is 50%. 1 bioreaction module.

[0065] The flow rate of waste gas containing toluene is 25m‐30 3 / s, the concentration is 1200‐1500mg / m 3 .

[0066] The removal rate of toluene is 95%.

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Abstract

The invention discloses a device and method for purifying waste gas containing VOCs by a membrane aeration biological membrane reactor. A biological reaction module 14 of the device is connected witha purified gas collecting device 7 and a liquid storage base 6; the biological reaction module 14 comprises a tubular biological reaction tower body 1; a membrane aeration air inlet pipe 10 is arranged at the upper part of the tubular biological reaction tower body; the membrane aeration air outlet pipe 11 is arranged at the lower part of the tubular biological reaction tower body; two ends of a hollow fiber membrane module 2 are separately connected with the membrane aeration air inlet pipe 10 and the membrane aeration air outlet pipe 11; a nutrient solution spraying device 5 is arranged above the hollow fiber membrane module 2; a waste gas source containing VOCs is connected with a waste gas flowmeter 15 through a pipeline, and then is connected with the membrane aeration air inlet pipe10 and one end of a waste gas inlet pipeline 8; and the other end of the waste gas inlet pipeline 8 is arranged in a manner of running through the side wall of the liquid storage base 6. The device provided by the invention has a simple structure and low running cost, and the method provided by the invention has no secondary pollution and low energy consumption.

Description

technical field [0001] The invention belongs to the field of organic waste gas treatment, and in particular relates to a device and a method for purifying waste gas containing VOCs by a membrane aeration biofilm reactor. technical background [0002] A clean atmosphere is one of the necessary conditions for human survival. A person may survive for several days without food and water, but he will die if he is cut off from the air for 5 minutes. In recent years, severe smog has occurred in most parts of northern my country, especially the Beijing-Tianjin-Hebei region, and VOCs (volatile organic compounds, volatile organic compounds) are one of the direct causes of this severe smog. Severe haze weather seriously affects people's normal life and poses a serious threat to people's health. [0003] VOCs (VOCs) are a class of carbon-containing organic substances, usually referring to organic compounds that are easy to evaporate or volatilize under ambient conditions, generally re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/84B01D53/44
CPCY02A50/20
Inventor 吴云楚红亮
Owner TIANJIN POLYTECHNIC UNIV
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