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Catalytic oxidation-bioreactor waste gas treatment apparatus

A technology for waste gas treatment equipment and bioreactors, which is applied in chemical instruments and methods, air quality improvement, separation methods, etc., can solve the problems of high investment, prolonged residence time, and high operating costs, and achieves simple operation and maintenance. Auxiliary equipment, the effect of improving purification efficiency

Inactive Publication Date: 2005-06-22
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

but cannot handle high concentrations of pollutants
[0009] The common defect of these three types of exhaust gas biological treatment equipment is that because microorganisms need to maintain a certain amount of biomass and residence time to degrade pollutants, they cannot effectively remove substances with high concentrations or slow biodegradation
Using the method of increasing the volume of the equipment to prolong the residence time will bring problems such as large floor area, complex equipment, large investment, and high operating costs.
When the load of the bioreactor changes, especially when it suddenly increases, the pollutants in the exhaust gas cannot be degraded by microorganisms in time, resulting in the phenomenon that the exhaust gas does not meet the standard
In addition, the gas pre-wetting equipment in the biological filter, the gas scrubbing equipment in the biological scrubber and the biological trickling filter all need a large amount of circulating water, which consumes a lot of energy.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0032] See figure 1 .

[0033] Catalytic oxidation-bioreactor exhaust gas treatment equipment made of plastic plates, its length, width and height are 50cm, 50cm, 1500cm respectively, including bioreactor 4 with packing, catalytic oxidizer 11, etc.; The bioreactor 4 of microorganism, the catalytic oxidizer 11 that oxidation catalyst 10 is housed and the drier 9 that desiccant 13 is housed constitute;

[0034] An air inlet 2 is opened on the lower side wall of the bioreactor 4, and a perforated pipe 1 is installed at the air inlet 2. The other side wall of the lower part is provided with a water outlet 3, the air inlet 2 should be lower than the water outlet 3, the upper side wall is provided with a spray liquid inlet 6, and there is a perforated pipe 7 at the inlet 6; the other side wall of the upper part is provided with an outlet Air pipe 8, air outlet pipe 8 are connected with drier 9.

[0035] The interior of the bioreactor 4 is filled with fillers 5 such as sponge or p...

Embodiment 2

[0045] See figure 1 .

[0046] The catalytic oxidation-bioreactor waste gas treatment equipment made of plexiglass has a diameter of 10 cm, and its structure and working process are the same as those in Example 1.

[0047] The treatment concentration is 511mg / m 3 The waste gas of acetic acid enters the catalytic oxidation-bioreactor from the air inlet 2, and the residence time is 1-3mins. Operate at room temperature. The concentration of gas outlet 12 is 1.06mg / m 3 , The removal rate reaches over 99.8%.

Embodiment 3

[0049] See figure 1 .

[0050] The catalytic oxidation-bioreactor waste gas treatment equipment made of plexiglass has a diameter of 10 cm, and its structure and working process are the same as those in Example 1.

[0051] The treatment concentration is 1306mg / m 3 The xylene waste gas enters the catalytic oxidation-bioreactor from the air inlet 2, and the residence time is 1-3mins. Operate at room temperature. The concentration of gas outlet 12 is 91.3mg / m 3 , which is lower than the maximum allowable concentration of harmful substances in the workshop air formulated by the state, and the removal rate reaches more than 93%.

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Abstract

This invention relates to green technique, which is a catalyzer oxidation to biology reaction container waste gas process device composed of biology reaction container, catalyzer oxidation device and drying device. The container is filled with stuff and has one air-in mouth down the sidewall with a hole pipe and one water-out on the other sidewall down. Its topside wall has spray liquid-in mouth and hole pipe and there is set with air-out pipe, wherein the air-out pipe is connected with the dryer and the dryer is connected with the catalyzer oxidation device. The catalyzer oxidation device is located with oxidation catalyzer with air-out mouth in the down part.

Description

technical field [0001] The invention relates to the field of environmental protection technology, and belongs to equipment for treating waste gas by using a bioreactor, in particular to catalytic oxidation-bioreactor waste gas treatment equipment. Background technique [0002] A large amount of polluting gases are produced in most industrial and agricultural production processes and transportation power systems. Pollutants in exhaust gas include volatile organic pollutants and malodorous substances. These pollutants are released into the air. On the one hand, they cause odor, damage the human body, destroy crops, form smog, and cause local pollution; The greenhouse effect brings regional effects. With the improvement of people's living standards, the public has increasingly strong requirements for environmental quality. Some developed countries have formulated relevant environmental protection laws to strictly control the discharge of these pollutants, requiring enterpris...

Claims

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Application Information

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IPC IPC(8): B01D53/75B01D53/84B01D53/86
CPCY02A50/20
Inventor 李琳刘俊新贺泓张长斌
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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