A catalytic ceramic filter tube and its preparation method
A ceramic filter tube and filter tube technology, which is applied in the direction of chemical instruments and methods, separation methods, physical/chemical process catalysts, etc., can solve the problems such as the decline of denitrification efficiency, and achieve the advantages of easy implementation, extended service life, and good high temperature resistance Effect
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preparation example Construction
[0047] The preparation method of catalytic ceramic filter tube of the present invention comprises the following steps:
[0048] 1. Preparation of ceramic filter tube matrix.
[0049] 1) Carry out pre-sintering and crushing of silicon carbide into particles and then sieve to obtain aggregates of different particle sizes, add high-temperature binder, and granulate through a mixer to obtain conventional powder;
[0050] 2) Put conventional powder into molds of different lengths, then put the molds into a cold isostatic press, form them by cold isostatic pressing, and finally dry them at 110-140°C in an air atmosphere, and then dry them The final ceramic core is sintered at 900-1200°C for 2-6 hours to obtain a ceramic matrix. The length of the prepared ceramic matrix is 1000, 1500, 3000mm, the outer diameter is 70mm, and the inner diameter is 50mm.
[0051] 2. Coating the catalytic active component layer on the ceramic filter tube substrate to obtain the catalytic ceramic filte...
example 1
[0063] The preparation method of catalytic ceramic filter tube of the present invention comprises the following steps:
[0064] 1. Preparation of ceramic filter tube matrix.
[0065] 1) Pre-sintering and crushing silicon carbide into particles and then sieving to obtain aggregates of different particle sizes, adding high-temperature binder polyvinyl alcohol, and granulating through a mixer to obtain conventional powder;
[0066] 2) Put conventional powder into molds of different lengths, then put the molds into cold isostatic presses, and dry them at 110°C under air atmosphere after cold isostatic pressing, and then dry the dried ceramic molds The core was sintered at 900°C for 2 hours to obtain a ceramic matrix.
[0067] 2. Coating the catalytic active component layer on the ceramic filter tube substrate to obtain the catalytic ceramic filter tube substrate.
[0068] 2.1 Preparation of boehmite sol; mix aluminum isopropoxide powder and water at a mass ratio of 3:20, and con...
example 2
[0078] The preparation method of catalytic ceramic filter tube of the present invention comprises the following steps:
[0079] 1. Preparation of ceramic filter tube matrix.
[0080] 1) Pre-sintering and crushing silicon carbide into granules and then sieving to obtain aggregates of different particle sizes, adding high-temperature binder JN-20 silica sol, and granulating through a mixer to obtain conventional powder;
[0081] 2) Put conventional powder into molds of different lengths, then put the molds into cold isostatic presses, and dry them at 120°C under air atmosphere after cold isostatic pressing, and then dry the dried ceramic molds The core was sintered at 1000°C for 4 hours to obtain a ceramic matrix.
[0082] 2. Coating the catalytic active component layer on the ceramic filter tube substrate to obtain the catalytic ceramic filter tube substrate.
[0083] 2.1 Preparation of boehmite sol; mix aluminum isopropoxide powder and water at a mass ratio of 3:20, and cont...
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