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A method for treating waste gas with a biological trickling filter tower and its special device

A biological trickling filter tower, biological treatment technology, applied in the direction of separation methods, chemical instruments and methods, air quality improvement, etc., can solve the problems of unfavorable filter tower equipment production, packing blockage, short residence time of empty tower, etc., and achieve the goal of packing Easy to replace and backwash, improve the clogging problem, and avoid the effect of channeling phenomenon

Inactive Publication Date: 2011-12-21
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Engineering practice and research show that these filter towers have defects in five aspects: ①Because the existing carrier used for microorganism immobilization in the filter tower is organic or inorganic filler, the mass transfer effect is poor and it is easy to cause short circuit. Agitating the packing or replacing the packing, the treatment effect is poor and it is not conducive to the equipment production of the filter tower; ②The surface load and mass load are small, so the removal capacity and removal rate are also small; ③The biological load is small; ④Resistance to high concentration and poisonous The performance of pollutants is poor; ⑤The structural design of the filter tower makes the empty tower residence time shorter, which affects the removal capacity and removal rate
Practice has shown that the main problems in the use of biological trickling filter towers are uneven water distribution, gas distribution and pH control in the tower, and the accumulation of dead microorganisms causes packing blockage

Method used

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  • A method for treating waste gas with a biological trickling filter tower and its special device
  • A method for treating waste gas with a biological trickling filter tower and its special device
  • A method for treating waste gas with a biological trickling filter tower and its special device

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Experimental program
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Effect test

Embodiment 1

[0029] The waste gas to be treated is simulated with the mixed waste gas containing hydrogen sulfide, methyl sulfide, and tetrahydrofuran, and the waste gas is treated with the biological trickling filter tower according to the present invention. The tower body 2 of the biological trickling filter tower consists of a tower bottom, a tower body, The tower top is composed of a waste gas inlet 1 at the bottom of the tower, and an exhaust gas outlet 3 is installed at the top of the tower; the tower body is composed of a plurality of biological treatment units 21 stacked from bottom to top. A liquid interlayer 14 is arranged between the biological treatment units of adjacent layers, and a vent 23 for adjacent layers to communicate with each other is arranged on the liquid interlayer, and the vent is arranged on the liquid interlayer with a The tubular protrusion 22 of the conical top cap, the top of the tubular protrusion is connected with the conical top cap 24 whose bottom surface...

Embodiment 2

[0035] The structure and experimental operation of the bio-trickling filter tower are the same as in Example 1. After the film formation in the reactor is completed, the hydrogen sulfide concentration at the inlet is 250-300 mg m -3 , EBRT is 14s, investigate the purification of hydrogen sulfide gas by the exhaust gas purification system of the biological trickling filter tower, the results are as follows image 3 As shown, it can be seen that the concentration of hydrogen sulfide is 250mg·m -3 , When the EBRT is 14s, the hydrogen sulfide removal rate is always maintained at 100%; when the hydrogen sulfide concentration is suddenly increased to 300mg m -3 When the hydrogen sulfide removal rate is stable above 99.9%, it shows that the biological trickling filter system has a good and stable removal effect on hydrogen sulfide.

[0036] Depend on Figure 4 It can be seen that when the EBRT is 14s, the hydrogen sulfide entering the biotrickling filter system is mainly removed in...

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Abstract

The invention discloses a method for treating waste gas with a biological trickling filter tower: the waste gas is passed through the bottom of the biological trickling filter tower, treated by the biological trickling filter tower, and the treated waste gas is discharged from the top, and the biological trickling filter tower is composed of The bottom of the tower with exhaust gas inlet, the tower body, and the top of the tower equipped with exhaust gas outlet are composed. The tower body is composed of several biological treatment units stacked from bottom to top, and the biological treatment units on adjacent layers are arranged There is a liquid interlayer, and the air vents for the adjacent layers are arranged on the liquid interlayer, and each layer of biological treatment units is independently equipped with a nutrient solution spray system and a temperature control device from top to bottom. Biological packing layer and nutrient solution receiving pool; the invention increases the processing load of the unit packing; improves the plugging problem of the packing layer, avoids the occurrence of channeling phenomenon, and has uniform and sufficient gas-liquid contact; packing replacement and backwashing are more convenient; the process Economical, suitable for the purification treatment of complex volatile organic mixed pollutants.

Description

(1) Technical field [0001] The invention relates to a method and a device for purifying waste gas in environmental engineering, in particular to a method for treating waste gas with a biological trickling filter tower and a special device thereof. (2) Background technology [0002] Many industrial production processes inevitably produce a large amount of waste gas. These waste gases are not suitable for recycling. They usually contain multi-component toxic and harmful organic and inorganic substances, which are harmful to human body and environment, and cause air pollution. [0003] At present, there are many technologies used for waste gas control. The commonly used technologies mainly include combustion method, adsorption method, chemical absorption method and biological method. Compared with other traditional treatment methods, biological method has less investment and lower operating cost. , No secondary pollution and other advantages, especially in the treatment of gase...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/84B01D53/48B01D53/72
CPCY02A50/20
Inventor 陈建孟陈东之房俊逸钱东升王家德
Owner ZHEJIANG UNIV OF TECH
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