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 urban ambient air quality hazards, industrial waste gas diffusion, etc., and achieve low cost, uniform gas distribution, and acid The effect of strong alkali buffering capacity

Active Publication Date: 2011-04-20
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, a

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

Example Embodiment

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

[0015] The composition ratio of this embodiment is: bark is in block shape, particle size is less than 50mm, compost is in granular shape, particle size is less than 5mm, inorganic medium includes ceramsite, plastic ball and shell, ceramsite and plastic ball are spherical with diameters respectively Less than 25mm and 500mm, the shells are irregular, 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 440 g / kg (calculated as calcium carbonate). The combined packing density is 450kg / m 3 , The porosity is 55.5%, and the carbon to nitrogen ratio is 100:5.

[0016] The composite packing is packed in the prior art biological filtration reactor, the reactor is 2000mm high, 1500mm long, 1500mm wide, and the packing height of the packing is 1200mm. Treatment of industri...

Example Embodiment

[0017] Example 2: Treatment of common waste gas

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

[0019] The combined packing is used to treat common industrial waste gas components such as toluene, xylene, styrene, acetone, methyl ethyl ketone, chloroform, etc. in the biological filtration reaction. The reactor is 800mm high, the inner diameter is 190mm, and the packing height is 340mm. The gas is combined The empty bed residence time of the packed bed is 30s. The treatment effect is shown in Table 1:

[0020] Table 1 The purification effect of the combined-filler biofiltration reactor on different common industrial waste gas (mg / m 3...

Example Embodiment

[0023] Example 3: Treatment of odor in a sewage plant

[0024] Two sets of biological trickling filter devices run in parallel, specifications: height 2100mm, inner diameter 900mm. The height of the filling layer is 1m, and the filling volume is 0.65m3. Equipment 1 is filled with the composite filler of the present invention (the weight ratio of each medium is bark: compost: ceramsite: plastic ball: shell=100:56:87:54:103. The shell alkalinity is 560g / kg calculated as calcium carbonate. The other requirements are the same as in Example 1). Equipment 2 is filled with prior art composite fillers (weight ratio: 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 treatment effect is shown in Table 2:

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

[0026]

[0027]

[0028] The results show that both the composite filler of the present invention and the existin...

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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, withstrong 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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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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