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Preparation method of porous silicon carbide slab ceramic membrane

A porous silicon carbide and ceramic membrane technology, which is applied in the field of inorganic porous materials and inorganic flat membrane separation materials, can solve the problems of expensive sintering furnace, high sintering temperature, and complicated sintering process

Inactive Publication Date: 2018-10-26
台州利欧环保新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] A problem to be solved by the present invention is: the existing porous silicon carbide ceramics adopts the recrystallization sintering method, which needs to be sintered under a protective atmosphere, the sintering temperature is as high as 2400 ° C, the sintering furnace is expensive and the sintering process is complicated.

Method used

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  • Preparation method of porous silicon carbide slab ceramic membrane
  • Preparation method of porous silicon carbide slab ceramic membrane
  • Preparation method of porous silicon carbide slab ceramic membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The mass percentage of 18μm silicon carbide particles, hot melt additives, methylcellulose, starch, triglycerin, oleic acid, ammonium polyacrylate, and cooked tung oil is 80.0:7.0:4.0:2.5:1.5:1.0:1.5:2.5 Blended in a mixed solvent of water and ethanol (V / V=3:1), the solvent accounts for 30wt% of the total, dry-mixed in a powerful blender for 10 minutes, and the solvent is wet-mixed for 120 minutes. The clay sticks are packed and packed in a vacuum bag, aged at 20°C for 24 hours, and then vacuumed again before opening the tube. The extruded mud blank is 110mm wide and 6mm thick, the middle channel is a 3mm×3mm square hole, the distance between the channels is 1mm, the distance between the channels and the flat support surface is 1.5mm, and the cutting length is set during extrusion 516mm porous silicon carbide flat ceramic support mud body, extrusion pressure 10Mpa, extrusion speed 25mm / s. Continuous microwave rapid shaping. After box-type microwave dehydration reaches 9...

Embodiment 2

[0052] The mass percentage of 45μm silicon carbide particles, hot melt additives, methylcellulose, starch, triglycerin, oleic acid, ammonium polyacrylate, and cooked tung oil is 75.0:10.0:4.0:3.0:1.5:1.0:1.5:4.0 Blended in a mixed solvent of water and ethanol (V / V=4:1), the mixed solvent accounts for 30wt% of the total, dry blended in a powerful blender for 10 minutes, solvent-added wet blended for 180 minutes, and then mud-blended in vacuum once. Pack the finished mud in a vacuum bag and leave it to rot at 20°C for 24 hours, and then vacuum the mud again before extruding. The extruded mud blank is 110mm wide and 6mm thick. The middle channel is a circular hole with a diameter of 3mm, the distance between the channels is 1mm, the distance between the channels and the support surface is 1.5mm, and the cutting length is set to be 516mm porous silicon carbide during extrusion. Flat ceramic support body mud, extrusion pressure 8Mpa, extrusion speed 20mm / s. The cart speed of the mu...

Embodiment 3

[0056] The mass percentage of 45μm silicon carbide particles, hot melt additives, methylcellulose, starch, triglycerin, oleic acid, ammonium polyacrylate, and cooked tung oil is 75.0:10.0:4.0:3.0:1.5:1.0:1.5:4.0 Blended in a mixed solvent of water and ethanol (V / V=4:1), the mixed solvent accounts for 30wt% of the total, dry blended in a powerful blender for 10 minutes, solvent-added wet blended for 180 minutes, and then mud-blended in vacuum once. Pack the finished mud in a vacuum bag and leave it to rot at 20°C for 24 hours, and then vacuum the mud again before extruding. The extruded mud blank is 110mm wide and 6mm thick. The middle channel is a circular hole with a diameter of 3mm, the distance between the channels is 1mm, the distance between the channels and the support surface is 1.5mm, and the cutting length is set to be 516mm porous silicon carbide during extrusion. Flat ceramic support body mud, extrusion pressure 8Mpa, extrusion speed 20mm / s. The cart speed of the mu...

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Abstract

The invention discloses a preparation method of a polymeric membrane, in particular to a preparation method of a porous silicon carbide slab ceramic membrane. The method comprises the following stepsof preparation of a supporting body, membrane layer coating and membrane layer sintering. Porous silicon carbide slab ceramic sheets are spaced by using T-shaped fireproof materials, the spacing rangeis within 5-20 mm, the situation is avoided that the sheets are in contact and accordingly the coated membrane layer is damaged, and the porous silicon carbide slab ceramic membrane is obtained through sintering under an air atmosphere. The preparation method has the advantages of being good in pollution resistance, easy to clean and recycle, long in service life, good in chemical stability, goodin mechanical strength and the like. The problems can be effectively solved that an organic hollow fiber membrane and an organic slab membrane are short in service life, low in mechanical strength, poor in oxidation resistance and are easily subjected to acid-base corrosion in the engineering application process. The porous silicon carbide slab ceramic membrane is particularly suitable for the fields such as chemical industry wastewater and landfill leachate and is a separation material which has the best development prospect.

Description

Technical field [0001] The patent of the present invention relates to the technical field of inorganic porous materials, in particular to the technical field of inorganic flat membrane separation materials, and specifically relates to a method for preparing porous silicon carbide flat ceramic membranes. Background technique [0002] Membrane bioreactor (MBR) is a highly efficient wastewater treatment process that organically combines membrane separation technology with the biologically activated sludge method in traditional biological treatment technology. Through the sieving effect of the membrane pores, under a certain negative pressure, the water after the oxidation and decomposition of the activated sludge is drawn from the membrane pores, and the activated sludge is intercepted by the filtration layer of the membrane to achieve the purpose of mud-water separation. At the same time, because the treated water is continuously pumped out, the concentration of activated sludge in...

Claims

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Application Information

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IPC IPC(8): B01D71/02B01D69/10B01D69/02B01D67/00C02F3/12
CPCB01D67/0041B01D69/02B01D69/105B01D71/02B01D2325/24B01D2325/30C02F3/1268Y02W10/10
Inventor 陈锋涛王壮利於华国苏新科陈锦奎周志阳
Owner 台州利欧环保新材料有限公司
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