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Ceramic fiber filtering material and preparation method thereof

A technology of ceramic fiber and filter material, applied in the field of ceramic fiber, can solve the problems of general high temperature stability, complex process flow, low mechanical strength, etc., and achieve the effect of improving mechanical strength, simple process flow, and improving filterability

Active Publication Date: 2020-07-03
山东鲁阳浩特高技术纤维有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the ceramic fiber filter material is prepared by the method disclosed in the above patent, the method is a wet process, and the whole process is relatively complicated; moreover, organic matter is used as a binder in the preparation process, resulting in relatively general high temperature stability of the product.
In addition, the current ceramic fiber filter material preparation process still has problems such as low product mechanical strength, low porosity, and poor filterability.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0023] The invention provides a kind of preparation method of ceramic fiber filter material, comprises the following steps:

[0024] a) mixing aluminum source, silica sol and spinning aid, then hydrolyzing and concentrating to obtain spinning solution;

[0025] b) performing fiber formation and cotton collection on the spinning solution to obtain a green body;

[0026] c) filling the green body with alumina airgel, and then performing acupuncture to obtain a needle-punched fiber blank;

[0027] d) Calcining the needle-punched fiber base to obtain a ceramic fiber filter material.

[0028] In the preparation method provided by the invention, the aluminum source, silica sol and spinning aid are mixed first. Wherein, the aluminum source includes but not limited to one or more of polyaluminum chloride sol, aluminum acetylacetonate organic solution, aluminum isopropoxide, aluminum formate and aluminum acetate. In the present invention, the aluminum oxide (Al 2 o 3 ) solid conte...

Embodiment 1

[0056] Follow the steps below to prepare ceramic fiber filter material:

[0057] (1) Weigh 3.75 kg of polyaluminum chloride sol and 1.25 kg of acidic silica sol, and mix them uniformly to obtain a silicon-aluminum mixed solution.

[0058] (2) Slowly dissolve polyvinyl alcohol (polymerization degree 2000, alcoholysis degree 88%) at 95° C. into an aqueous solution with a mass fraction of 8% solution; weigh 1 kg of polyvinyl alcohol aqueous solution, and add it to the silicon aluminum mixture.

[0059] (3) Stir the above mixed solution evenly, then hydrolyze at 50°C for 2h, heat up to 120°C and distill and concentrate for 2.5h to obtain a transparent and uniform silicon-aluminum composite spinning solution, which is ready for use.

[0060] (4) The above-mentioned silicon-aluminum composite spinning solution is spun into fibers under the conditions of spinning disk speed 3000r / min, wind pressure 130Pa, temperature 70°C, and relative humidity 20%. The cotton is evenly collected o...

Embodiment 2

[0068] Follow the steps below to prepare ceramic fiber filter material:

[0069] (1) Weigh 4.25 kg of polyaluminum chloride sol and 0.75 kg of acidic silica sol, and mix them uniformly to obtain a silicon-aluminum mixed solution.

[0070] (2) Slowly dissolve polyvinyl alcohol (polymerization degree 2000, alcoholysis degree 88%) at 95° C. into an aqueous solution whose mass fraction is 9%; weigh 1.2 kg of polyvinyl alcohol aqueous solution, and add it to the above-mentioned In the silicon-aluminum mixture.

[0071] (3) Stir the above mixed solution evenly, then hydrolyze at 50°C for 2h, heat up to 120°C and distill and concentrate for 2.5h to obtain a transparent and uniform silicon-aluminum composite spinning solution, which is ready for use.

[0072] (4) The above-mentioned silicon-aluminum composite spinning solution is spun into fibers under the conditions of spinning disk speed 3000r / min, wind pressure 130Pa, temperature 70°C, and relative humidity 20%. The cotton is eve...

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Abstract

The invention belongs to the technical field of ceramic fibers, and particularly relates to a ceramic fiber filter material and a preparation method thereof. The preparation method provided by the invention comprises the following steps: a) mixing an aluminum source, silica sol and a spinning aid, and then hydrolyzing and concentrating to obtain a spinning solution, b) carrying out fiber forming and cotton collection on the spinning solution to obtain a blank, c) filling the blank with alumina aerogel, and then needling to obtain a needled fiber blank, and d) roasting the needled fiber blank to obtain the ceramic fiber filter material. Experimental results show that the porosity of the ceramic fiber filter material prepared by the method is 90% or above, the wind erosion resistance is greater than 40 m / s, the tensile strength is greater than or equal to 0.1 MPa, and the typical dust emission quantity can be controlled within 5 mg / nm<3>.

Description

technical field [0001] The invention belongs to the technical field of ceramic fibers, in particular to a ceramic fiber filter material and a preparation method thereof. Background technique [0002] Ceramic fiber filtration technology is one of the fastest-growing filtration technologies in recent years. Compared with the traditional granular filter material, the fiber filter material has a larger specific surface area, has a larger interface adsorption and can intercept suspended solids, and has a better filtering effect. Compared with traditional filter materials such as cloth bags, fiber filter materials can be used in high-temperature environments; compared with porous ceramic and metal filter materials, fiber filter materials do not need to be sintered, have low resistance, save energy, and have good chemical stability and thermal shock resistance. . The excellent performance of ceramic fiber makes it widely used in air purification, high temperature flue gas filtrat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/80C04B38/00B01D39/20
CPCC04B38/0054B01D39/2086C04B2235/3217C04B2235/444C04B2235/48C04B2235/449C04B2235/77C04B2235/96C04B35/803C04B38/0074C04B38/0067
Inventor 傅超郑维金岳耀辉鹿明赵业娟
Owner 山东鲁阳浩特高技术纤维有限公司
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