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A plate type biofiltration tower and waste gas treatment process thereof

A filter tower and biological technology, applied in air quality improvement, dispersed particle separation, chemical instruments and methods, etc., can solve problems such as uneven distribution of water and biomass, easy blockage of pipeline dehydrators, and low support strength, etc., to achieve Avoid channeling, reduce strength requirements, and facilitate packing replacement

Active Publication Date: 2006-11-22
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the shortcomings of the existing biological oxidation treatment equipment, such as the thickness of the packing layer, the uneven distribution of pollution load on the packing layer, nutrients, water and biomass, and the easy blockage of the pipeline dehydrator, the present invention provides a fully and uniform gas-liquid contact , the support strength of the packing layer is small, and the plate structure waste gas biological filter tower and its waste gas treatment process are integrated with the dehydration system

Method used

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  • A plate type biofiltration tower and waste gas treatment process thereof
  • A plate type biofiltration tower and waste gas treatment process thereof
  • A plate type biofiltration tower and waste gas treatment process thereof

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Embodiment 1

[0023] Embodiment and working principle of the present invention are: containing toluene 0.75~1.00g / m 3 Plate-type biological filtration treatment process of waste gas, empty bed gas velocity 0.05m / s, empty bed residence time 20s, packing layer temperature 25-30°C, liquid phase pH range 6.5-7.5 (microbial dominant bacteria are Pseudomonas spp. The biofilm carrier filler is a plastic flat triangle). The inner diameter of the tower is 800mm, and the biofilm carrier filler is placed in three ways: one layer (thickness 1.0m), two layers (each thickness 500mm), and four layers (thickness each 250mm). Nutrients and toluene exhaust gas are in reverse contact, and nutrients are sprayed The strength control is the same, that is, 20L / m 2 .h, such as figure 2 shown. The exhaust gas treatment results are shown in Table 1.

[0024] Table 1 Toluene waste gas treatment results

[0025]

[0026] (875)

[0027] The results in Table 1 show that under ...

Embodiment 2

[0029] Embodiment and working principle of the present invention are: containing H 2 S 0.175~0.228g / m 3Plate-type biological filtration treatment process for waste gas, empty bed gas velocity 0.05m / s, empty bed residence time 20s, packing layer temperature 25-30°C, liquid phase pH range 3.0-4.0 (microbial dominant bacteria are Thiobacillus genus, biological Membrane carrier packing is plastic flat triangle). The inner diameter of the tower is 800mm, and the biofilm carrier filler is still placed in three ways: one layer (thickness 1.0m), two layers (each thickness 500mm), and four layers (thickness each 250mm). 2 S exhaust gas reverse contact, nutrient spray intensity control is the same, that is, 20L / m 2 .h, such as figure 2 shown. The exhaust gas treatment results are shown in Table 2.

[0030] Table 2H 2 S waste gas treatment result

[0031]

[0032] The results in Table 2 show that under the same operating conditions, the structure of the plat...

Embodiment 3

[0034] The embodiment and working principle of the present invention are as follows: the operating conditions are the same as in Example 1, the inner diameter of the tower is 800 mm, and there are four layers of biofilm carrier packing trays, each layer thickness is 250 mm, and the nutrient spray is controlled by three modes: Mode 1 , the spray intensity of the four layers is the same, both are 20L / m 2 .h; mode 2, the top tray is not sprayed, and the spray intensity of the other three layers is the same, that is, 20L / m 2 .h; mode 3, the top tray is not sprayed, and the other three layers start from the inlet end of the bottom layer, and the spray intensity is gradually reduced by 30%, that is, the bottom layer is 20L / m 2 .h, second floor 14L / m 2 .h, three layers 9.8L / m 2 .h. The exhaust gas treatment results are shown in Table 3.

[0035] Table 3 Toluene waste gas treatment results

[0036]

[0037] The results in Table 3 show that the exhaust gas bio...

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Abstract

The invention provides a plate-type biological filtration tower and the process of treating waste gas. The tower plate is produced according to ratio between layer thickness and tower diameter being 0.2-0.5 and the whole biological filtration tower composes a plurality of tower plates. The nutriment liquid is directly sprayed to every tower plate and counter-current contacts with waste gas from tower bottom to remove pollutant in waste gas; the pollutant is oxided to carbon dioxide, water and other simple compound. The top tower plate is used as dehydrater for gas current to spray cleaning liquid interstitially (usually 1% diluted alkaline liquor). The invention is characterized in that: the contact between gas and liquid is even and thorough, the spray strength can be controlled according to pollutant load, the supporting intensity of filler layer is small, and dewatering system is installed inside.

Description

(1) Technical field [0001] The invention relates to a plate type biological filter tower and a process method for treating waste gas by using it. (2) Background technology [0002] Due to the incomparable advantages of low cost and environmental friendliness compared with traditional methods (such as absorption, adsorption, combustion, etc.), waste gas biological oxidation treatment technology is becoming a high-tech that is rapidly promoted in the field of waste gas pollution control, especially at low concentrations. , Large volume of organic waste gas and malodorous gas treatment. So far, the biological treatment of waste gas has expanded from the initial odor and simple organic compounds to the control of gaseous pollutants such as aromatic hydrocarbons, halogenated hydrocarbons and even inorganic substances. [0003] According to the form of microorganisms, exhaust gas biological treatment technology can be divided into two types: suspension type and attachment type. T...

Claims

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Application Information

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IPC IPC(8): B01D53/84
CPCY02A50/20
Inventor 王家德高增梁陈建孟黄奕平褚淑祎
Owner ZHEJIANG UNIV OF TECH
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