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Method for preparing corundum microporous aerator pipe

A microporous aeration and corundum technology is applied in the field of preparation of corundum microporous aeration pipes, which can solve the problems of energy consumption, easy blockage, fracture and deformation of the pipe body, etc., and achieves energy saving, high initial strength, and improved service life. Effect

Inactive Publication Date: 2010-11-17
JIANGSU YIYANG WATER IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The corundum aerator was first developed from the disc type imported from the UK, but the disc type has its own inherent defects: there is an aeration dead zone (such as the entire bottom of the pan), and when the aeration is stopped, the mud is directly deposited on the surface of the pan. Re-starting will re-stir the mud, which consumes more energy than the tube type and is easy to clog
However, using the existing technology to produce corundum microporous aeration tubes with a length of 100mm or more often has the problem of fracture and deformation of the tube body.

Method used

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  • Method for preparing corundum microporous aerator pipe
  • Method for preparing corundum microporous aerator pipe

Examples

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Effect test

Embodiment 1

[0022] 83 parts by weight of corundum sand with a particle size of 80 meshes, 14 parts by weight of kaolin, 0.5 parts by weight of binder dextrin, 2.5 parts by weight of porogen wood powder, 0.05 parts by weight of crosslinking agent N-methylolacrylamide and 18 parts by weight of water Parts by weight, according to the conventional process, mix, mature, and extrude to form a corundum tube of DN70×1000mm with a wall thickness of 10mm, solidify and dry on a V-shaped support, and then sinter in a pusher kiln with a high temperature zone of 1200-300°C and a length of 40 meters. Into the corundum microporous aeration tube. The porosity of the product is 45.6%, the compressive strength is 56MPa, the bending strength is 25MPa, and the roundness is 0.4.

Embodiment 2

[0024] 82.5 parts by weight of corundum sand with a particle size of 100 meshes, 14 parts by weight of kaolin, 0.5 parts by weight of polyvinyl alcohol as a binder, 3 parts by weight of porogen coke powder, 0.1 parts by weight of crosslinking agent N-methylolacrylamide and water 25 parts by weight, mixed, matured and extruded according to the conventional process to form a DN70×1200mm corundum tube with a wall thickness of 15mm, cured on a V-shaped support and dried in a pusher kiln with a high temperature zone of 1200-300°C and a length of 50 meters Sintered into corundum microporous aeration tube. The porosity of the product is 47.3%, the compressive strength is 50MPa, the bending strength is 28MPa, and the roundness is 0.5.

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Abstract

The invention belongs to the field of environmental protection and discloses a method for preparing a corundum microporous aerator pipe. The corundum microporous aerator pipe is prepared by mixing, curing, extruding, airing and solidifying and sintering corundum powder, kaolin, a pore-forming agent, an adhesive, a cross-linking agent and water which are used as raw materials sequentially, wherein the cross-linking agent is N-hydroxymethyl acrylamide and the using amount of the cross-linking agent is 10 to 20 percent of the mass of the adhesive. The corundum microporous aerator pipe prepared by the method has the advantages of high aeration density and oxygenation efficiency, high strength, long service life and length of more than 1 meter.

Description

technical field [0001] The invention belongs to the field of environmental protection and relates to a method for preparing a corundum microporous aeration pipe. Background technique [0002] The main pollutant components of urban sewage are basically substances that are easily decomposed by microorganisms. In the urban sewage treatment process, the use of aeration and oxygenation to cultivate microorganisms to decompose organic pollutants is the most commonly used method. Aeration and oxygenation are the most important technical support means in the operation of urban sewage treatment process. Therefore, improving the efficiency of the aeration system is of great significance to the biological treatment effect and energy saving and emission reduction. Blast microporous aeration technology is mostly used in traditional activated sludge process and A / 0, A2 / 0, AB, SBR and other processes. [0003] According to the material, the microporous aerator mainly includes corundum, ru...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/622C02F3/02
CPCY02W10/10
Inventor 凌跃成钱振华顾月芬
Owner JIANGSU YIYANG WATER IND
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