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A kind of filter material modification method for biological trickling filter

A biological trickling filter and filter material technology, applied in separation methods, chemical instruments and methods, and air quality improvement, can solve problems such as clogging of biological trickling filters, increase adsorption performance, reduce growth, and overcome resistance. added effect

Inactive Publication Date: 2018-06-22
上海品境节能环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the continuous supply of nutrients, the continuous accumulation of biomass will eventually lead to the blockage of the filler of the biological trickling filter. This is a key factor affecting the long-term stable operation of the biological trickling filter, which has attracted widespread attention at home and abroad.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Pretreatment: the volcanic rock filter material particles with an average particle diameter of 1 cm are rinsed with clear water, soaked in a solution of 8% activated carbon powder (particle diameter 0.5 μm) in a mass concentration, and the solution is constantly stirred and rolled during the soaking process. Continue for 6h, take out and dry.

[0021] (2) Preparation of coating solution: According to the composition of the film-making solution, solvent (N,N-dimethylformamide and N,N-dimethylacetamide are mixed at 1:1), polysulfone (MW=50000), Add Tween-80 into the stirring tank in turn, the mass concentration of polysulfone and Tween-80 are 5% and 1% respectively, adjust the temperature of the temperature control meter to 80°C, stir at a certain speed for 4 hours to prepare the coating solution . Then let it stand for 6 hours to degas.

[0022] (3) Modification of the filter material: the dried inorganic filter material particles are completely immersed in the coa...

Embodiment 2

[0024] (1) Pretreatment: Rinse the shale ceramsite filter material particles with an average particle size of 3 cm with clear water, soak them in a solution with a mass concentration of 5% activated carbon powder (particle size 2 μm), and keep stirring the solution during the soaking process Roll over, stay for 8 hours, take out to dry.

[0025] (2) Preparation of coating solution: add N,N-dimethylformamide, polyvinylidene fluoride (MW=20000), and polyethylene glycol 2000 into the stirring tank in sequence according to the composition of the film-making solution, polyvinylidene fluoride and polyvinylidene fluoride The mass concentrations of polyethylene glycol 2000 were 6% and 0.5%, respectively, the temperature of the temperature control meter was adjusted to 80°C, and the coating solution was prepared by stirring at a certain speed for 4 hours. Then let it stand for 6 hours to degas.

[0026] (3) Modification of the filter material: the dried inorganic filter material parti...

Embodiment 3

[0028] (1) Pretreatment: Wash the volcanic rock and clay ceramsite filter material particles with an average particle size of 5 mm with clear water, and soak them in a solution of 18% activated carbon powder (particle size 0.1 μm) in a mass concentration. During the soaking process, the solution does not Stop stirring and tumble for 5 hours, take it out and dry it.

[0029] (2) Preparation of coating solution: add N,N-dimethylacetamide, polyvinylidene fluoride resin, and polyvinyl alcohol into the stirring tank in sequence according to the composition of the film-making liquid, the quality of polyvinylidene fluoride resin and polyvinyl alcohol Concentrations were 8% and 0.5%, respectively, the temperature of the temperature control meter was adjusted to 80° C., and the coating solution was prepared by stirring at a certain speed for 4 hours. Then let it stand for 6 hours to degas.

[0030] (3) Modification of the filter material: the dried inorganic filter material particles ...

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Abstract

The invention discloses a filter material modifying method for a biological trickling filter. The method includes the steps of firstly, conducting preprocessing, wherein a filter material is rinsed thoroughly with clear water and then soaked in an adsorption agent powder solution, the solution is stirred and turned without stop in the soaking process for 5 hours or longer, and finally the filter material is taken out to be dried for use; secondly, preparing a coating solution, wherein polar solvent, high polymer and a pore-forming agent are sequentially added into a stirring kettle according to the composition of a film forming solution, the temperature of a temperature control meter is adjusted to be 80 DEG C, and stirring is conducted for 4-5 hours at certain rotating speed to prepare the coating solution, standing is conducted for 6 hours, and then defoaming is conducted; thirdly, modifying the filter material, wherein the dried filter material is taken out instantly after being soaked in the coating solution and is then soaked in water instantly after being taken out, the coating solution is instantly solidified and formed, a white wrapping layer is formed on the surface of the filter material, and it shows that the surface of the filter material is modified. When the surface of the filter material is coated and modified through the method, the structure of the filter material is not changed, and the method is easy to operate and beneficial to industrial production.

Description

technical field [0001] The invention belongs to the technical field of waste gas treatment, and in particular relates to a method for modifying a filter material for a biological trickling filter. Background technique [0002] As a promising organic waste gas treatment technology, the biotrickling filter method has obtained extensive laboratory and pilot studies, and the results show that the biotrickling filter can be used to treat refractory volatile organic gases. But in general, due to reasons such as start-up time and long residence time, the application of industrial organic waste gas biotrickling filter treatment engineering is limited. To solve the above problems, it is necessary to combine research results in the fields of chemistry, materials, microorganisms, and molecular biology. , by improving the mass transfer performance of the packing, the engineering practicability of the biological trickling filter can be improved. [0003] Although the biological tricklin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/30B01D53/84
CPCB01D53/84B01J20/02B01J20/10B01J20/12B01J20/20B01J20/261B01J20/262B01J2220/46B01J2220/4806B01J2220/4812Y02A50/20
Inventor 李方田晴
Owner 上海品境节能环保科技有限公司