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High temperature ceramic fiber membrane microfiltration tube

A technology of high-temperature ceramics and ceramic fibers, applied in ultrafiltration, membrane technology, semi-permeable membrane separation, etc. problems, to achieve excellent chemical stability, high mechanical strength and thermal denaturation, beneficial to whisker formation and growth

Active Publication Date: 2020-07-31
萍乡市三盈科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the existing high-temperature ceramic membrane microfiltration tubes still have the following deficiencies in actual use: the first is that the membrane layer structure is not very stable, the high-temperature fission resistance stability is not high, and the service life is not long; the second is that the micropore dispersion of the membrane layer is not very good. Even, the specific surface area is not large enough, the porosity is not high enough, and the dust removal effect is not very ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1, the high-temperature ceramic fiber membrane filter tube includes a support tube body and a fiber membrane layer coated on the surface of the support tube body, and the high-temperature ceramic fiber membrane filter tube is prepared according to the following method steps:

[0022] a. Crushing of main materials: crush polycrystalline mullite (preferable), α-alumina (preferred), titanium aluminum carbide, γ-zirconia (preferred), potassium feldspar and walnut shell powder to particle size The diameter is less than 1mm; then use a ball mill to grind for 4 hours, and pass through a 40-100 mesh sieve for later use.

[0023] b. Ratio of main ingredients: 45wt% polycrystalline mullite, 25wt% α alumina, 7wt% titanium aluminum carbide, 4wt% gamma zirconia, 13wt% potassium feldspar and 6wt% walnut shell powder Mix in a kneader to obtain a compound, then add carboxymethyl cellulose with a mass of 18% of the mass of the compound and vegetable oil with a mass of 3% of t...

Embodiment 2

[0035] Embodiment 2, the high-temperature ceramic fiber membrane filter tube includes a support tube body and a fiber membrane layer coated on the surface of the support tube body, and the high-temperature ceramic fiber membrane filter tube is prepared according to the following method steps:

[0036] a. Crushing of main materials: crush polycrystalline mullite (preferable), α-alumina (preferred), titanium aluminum carbide, γ-zirconia (preferred), potassium feldspar and walnut shell powder to particle size The diameter is less than 1mm; then use a ball mill to grind for 4 hours, and pass through a 40-100 mesh sieve for later use.

[0037] b, main material ratio: 50wt% polycrystalline mullite, 20wt% α alumina, 3wt% gamma zirconia, 10wt% titanium aluminum carbide, 10wt% potassium feldspar and 7wt% walnut shell powder in Mix in a kneader to obtain a mixture, then add carboxymethyl cellulose with 15% of the weight of the mixture and vegetable oil with 5% of the weight of the mixtu...

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Abstract

The invention discloses a high temperature ceramic fiber membrane microfiltration tube which is prepared by the following steps: main materials mullite, alumina, titanium aluminum carbide, zirconium oxide, potassium feldspar and walnut shell powder are mixed in a kneader, carboxymethyl cellulose and vegetable oil are added for mixing, a blank is extruded and dried, fired at 1350 DEG C under heat insulation, and cooled to obtain a supporting tube body for standby use; zirconia aluminosilicate ceramic fiber, aluminum titanate, mullite, magnesium oxide, cerium oxide and feldspar are mixed evenly in kneader to obtain a mixture, and an additive is added into the mixture to obtain a film material to form a fiber membrane on the outer surface of the supporting tube body by high temperature firing. The high temperature ceramic fiber membrane microfiltration tube has high mechanical strength and thermal denaturation, membrane layer micro pore distribution is good, specific surface area is large, pore connectivity is good, filtering accuracy can reaches 0.1 mum, the service life is increased by more than 30%, the dust removal efficiency reaches 99.99%, and the dust concentration after filteration is less than 10mg / Nm3, and is far better than that of the national standard.

Description

technical field [0001] The patent of the invention relates to a high-temperature ceramic fiber membrane microfiltration tube used for dust removal and purification of various high-temperature flue gases, which belongs to the field of environmental protection and new materials. Background technique [0002] As we all know, the traditional methods of high-temperature flue gas treatment include cloth bag, electrostatic, water film and cyclone dust removal methods. In the traditional method, water film dust removal has poor dust removal effect on dust particles larger than 100 μm, and the water consumption is large, which is easy to cause secondary pollution. The dust removal efficiency Low cost, short service life; electrostatic precipitator occupies a large area, high power consumption, and large loss of accessories; bag filter bag is easy to harden or burn out, and must be replaced frequently, resulting in high operating costs and short service life; cyclone The dust removal ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/185C04B41/87B01D46/54B01D61/14B01D67/00B01D69/10B01D71/02
CPCB01D46/543B01D61/147B01D67/0039B01D69/105B01D71/02C04B35/185C04B41/009C04B41/5042C04B41/87C04B41/5041C04B41/5029C04B41/5024C04B41/5045C04B41/455
Inventor 邓建波
Owner 萍乡市三盈科技有限公司
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