Composite filler for biologically filtering industrial waste gas

A combination of packing and biological filtration technology, which is applied in the direction of air quality improvement, dispersed particle separation, chemical instruments and methods, etc., can solve the problems of industrial waste gas diffusion, urban ambient air quality hazards, etc., and achieve uniform gas distribution, low cost, and porosity large effect

Active Publication Date: 2013-03-20
广东省南方环保生物科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In addition, although sewage plants have begun to use biological filtration-based technologies for the treatment of odorous gases, most other industrial enterprises such as plastic resins, paint coatings, pharmaceuticals, livestock and poultry breeding, petrochemicals, and automobile coatings, etc. There is no waste gas treatment device. Although many of them are located in the suburbs of the city, the various industrial waste gases they generate diffuse into the atmosphere, which also poses a potential hazard to the urban ambient air quality.

Method used

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  • Composite filler for biologically filtering industrial waste gas
  • Composite filler for biologically filtering industrial waste gas
  • Composite filler for biologically filtering industrial waste gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Example 1: Treatment of waste gas from production workshops in the paint and coatings industry

[0015] The composition ratio of this embodiment is as follows: the bark is blocky and the particle size is less than 50 mm, the compost is granular and the particle size is less than 5 mm, the inorganic medium includes ceramsite, plastic balls and shells, the ceramsite and plastic balls are spherical, and the diameters are respectively Smaller than 25mm and 500mm, the shell is irregular in shape, and the size range is between 10mm and 20mm. The weight ratio of each component is bark: compost: ceramsite: plastic ball: shell=98:53:84:50:100. The shell alkalinity is 440g / kg (calculated as calcium carbonate). The bulk density of the combined packing is 450kg / m 3 , the porosity is 55.5%, and the carbon-nitrogen ratio is 100:5.

[0016] The combined packing is filled in the biofiltration reactor of the prior art, the reactor is 2000 mm high, 1500 mm long, 1500 mm wide, and the ...

Embodiment 2

[0017] Example 2: Treatment of Common Exhaust Gas

[0018] The composition ratio of the present embodiment is: the form requirements of each component are the same as in Example 1, and the weight ratio is bark: compost: ceramsite: plastic ball: shell=104:60:90:56:105. The shell alkalinity is 680g / kg (calculated as calcium carbonate). The bulk density of the combined packing is 450kg / m 3 , the porosity is 55.5%, and the carbon-nitrogen ratio is 100:5.

[0019] The combined packing is filled in the biological filtration reaction to treat common industrial waste gas components such as toluene, xylene, styrene, acetone, methyl ethyl ketone, and chloroform. The empty bed residence time of the packed bed is 30s. The processing effect is shown in Table 1:

[0020] Table 1 Purification effect of combined packing biofiltration reactor on different common industrial waste gases (mg / m 3 )

[0021]

[0022] The results show that the combined filler has a strong removal effect on ...

Embodiment 3

[0023] Embodiment 3: to the processing of sewage plant odor

[0024] Two sets of biological trickling filter devices are running in parallel, specifications: height 2100mm, inner diameter 900mm. The height of the packing layer is 1m, and the packing volume is 0.65m3. Equipment 1 is filled with combined filler of the present invention (the weight ratio of each medium is bark: compost: ceramsite: plastic ball: shell=100: 56: 87: 54: 103. The alkalinity of the shell is 560g / kg in terms of calcium carbonate. All the other requirements are with embodiment 1). Equipment 2 is filled with prior art combined filler (weight ratio is bark: compost: ceramsite=100:48:130). The operating conditions of the two sets of equipment are the same, and the gas residence time is 20s. The processing effect is shown in Table 2:

[0025] Table 2 Treatment effect of combined packing on odor in sewage plant

[0026]

[0027]

[0028] The result shows that the combined packing of the present in...

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Abstract

The invention provides composite filler for biologically filtering industrial waste gas, which has large porosity, low stacking density, high strength and strong acid-base buffer capability and is formed by combining inorganic media with organic media, wherein the organic media comprise bark and composting manure; the weight ratio of various media of the bark to composting manure to ceramic particles to plastic balls to shell is (98-104):(53-60):(84-90):(50-56):(100-105). The stacking density of the composite filler is 450kg / m<3>, the porosity is 55.5 percent and the ratio of carbon to nitrogen is 100:5. Compared with the current common biofiltration filler, the composite filler has the characteristics of large porosity, low stacking density, high strength and the like. Particularly, with strong acid-base buffer capability, the problem which cannot be solved by the prior art can be solved. The invention not only can provide reasonable environment conditions for degraded strains to stably grow for a long term and benefit the proliferation and biomembrane forming of the degraded strains on the surface of the filler, but also benefit the diffusion of gas on the biomembrane on the surface of the filler.

Description

technical field [0001] The invention relates to the technical fields of chemical industry and environmental protection, in particular to a combined filler for biological filtration of industrial waste gas. technical background [0002] Since the implementation of the new "Pollutant Discharge Standards for Urban Sewage Treatment Plants" in our country, sewage plants around the world have generally adopted biological filtration technology to treat odorous gases such as hydrogen sulfide, mercaptans, sulfides, and ammonia. The fillers used in biological filtration devices are different, mainly organic substances, including bark, compost, coconut fiber, straw, etc. After long-term use, organic fillers will be partially degraded under the action of microorganisms, resulting in plugging of fillers, gas in the filler bed, etc. Through increased resistance and local creation of anaerobic zones. In addition, the acidic substances produced during the biological filtration of waste gas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/85
CPCY02A50/20
Inventor 李建军许玖英叶广运王薇张甜甜方卫郑理慎
Owner 广东省南方环保生物科技有限公司
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