Attapulgite composite filter material and its preparation method

A composite filter material and attapulgite technology, applied in separation methods, chemical instruments and methods, filtration and separation, etc., can solve the problems of high price, difficult to obtain materials, small specific surface area, etc., and achieve high-efficiency treatment, good film hanging performance, strong strength high effect

Inactive Publication Date: 2014-01-22
SHAANXI SHENGMAI PETROLEUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, small and inert particles such as sand, activated carbon, coke, ceramsite, zeolite, magnetic ring, porous ball, plastic ball, slag, fine quartz sand, etc. are used as carriers to fill the bed. However, such carriers exist such as Disadvantages such as high density, small specific surface area, slow film formation, no wear resistance, difficulty in forming a fluid state, high price, and difficult to obtain materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Mix 60 kg of attapulgite, 25 kg of floating beads, 5 kg of glass powder and 10 kg of charcoal powder, add water and stir, use a granulator to prepare a circular lightweight filter material with a particle size of 4-5 mm, dry it naturally Put it in a constant temperature drying oven at 90°C, dry it for 2 hours, take it out, and then put it in a box-type resistance furnace for sintering at 950-1000°C.

[0009] From the SEM image of the attapulgite carrier, it can be seen that some crystalline substances and a large amount of amorphous substances form an irregular network structure, which increases the strength of the ceramsite, and the internal pores are distributed in an irregular network, and the pore diameter is mostly 1.50 μm. within range. Generally, the scale of bacteria in water treatment is: the width of bacilli is generally 0.5-1 μm. The length is generally 1-5 μm; the diameter of cocci is usually 0.5-2 μm.

[0010] From the model of biofilm attachment process,...

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PUM

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Abstract

The invention relates to a filter material for liquid or gaseous fluids. An attapulgite composite filter material of the invention comprises attapulgite, floating bead, glass powder and carbon powder, and the mass ratio of attapulgite to floating bead to glass powder to carbon powder is 60:25:5:10. A preparation method of the attapulgite composite filter material comprises evenly mixing the attapulgite, the floating bead, the glass powder and the carbon powder according to the mass ratio of 60:25:5:10, adding water and stirring to prepare a circular filter material with the particle diameter of 4-5mm, naturally drying, placing at a constant temperature of 90 DEG C for drying for 2h, and then sintering at the temperature of 950-1000 DEG C. The attapulgite composite filter material is high in strength and good in membrane hanging performance, and can efficiently process COD (chemical oxygen demand), ammonia nitrogen and other indexes in waste water.

Description

【Technical field】 [0001] The invention relates to a filter material for liquid or gaseous fluid and its preparation method. 【Background technique】 [0002] Three-phase biological fluidized bed is a bioreactor in which gas, liquid and solid coexist. The treatment performance of the three-phase biological fluidized bed is not only related to the structure of the fluidized bed itself, but also has a great relationship with the performance of the carrier. Generally, small and inert particles such as sand, activated carbon, coke, ceramsite, zeolite, magnetic ring, porous ball, plastic ball, slag, fine quartz sand, etc. are used as carriers to fill the bed. However, such carriers exist such as It has disadvantages such as high density, small specific surface area, slow film formation, non-wear resistance, difficulty in forming a fluid state, high price, and difficult material acquisition. 【Content of invention】 [0003] The invention aims to provide a spherical lightwei...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/06
Inventor 王耀斌
Owner SHAANXI SHENGMAI PETROLEUM
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