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Method for preparing filtering material for removing acidic gas in air

A filter material, acid gas technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of small specific surface area of ​​alumina, low purification efficiency, etc., to increase specific surface area, improve purification efficiency, and prevent acid corrosion Effect

Active Publication Date: 2009-10-28
AIKANG AIR PROCESSING SYST BEIJING
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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for making filter materials for removing acid gases in the air, so as to solve the problems that the specific surface area of ​​alumina adsorption in the acid removal filter materials made in the prior art is small and the purification efficiency is very low

Method used

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Embodiment Construction

[0010] Process flow of the present invention is:

[0011] 1. Preparation of potassium permanganate solution: 100 parts of distilled water, 10 parts of potassium permanganate, 8 parts of sodium carbonate, and 10 parts of ammonium bicarbonate were made into an aqueous solution.

[0012] 2. Ball making: After the raw material aluminum hydroxide is pulverized (with a particle size of 7-15 microns), it is flash-roasted in a dehydration furnace to make alumina powder, and then the alumina powder and potassium permanganate solution are added to the ball forming machine to make balls (forming The temperature of the ball machine is controlled at 50-80°C, 3-5 hours), and the size of the ball is roughly controlled at 3-5mm. The ratio of alumina powder to potassium permanganate solution is subject to the ability to form balls, and the weight ratio of the two is generally 10: (5-7).

[0013] 3. Hydration: Put the prepared pellets into the hydration furnace, and use 95-100 degree steam to ...

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Abstract

The invention provides a method for preparing filtering material for removing acidic gas in air, which includes steps of preparing potassium permanganate solution; granulating: after crushing, raw material aluminum hydroxide (with granularity of 7-15 microns) is treated by flash-roasting to prepare aluminum oxide powder, the aluminum oxide powder is put into a ball forming mill and added with the potassium permanganate solution to prepare balls, the size of the ball is controlled to about 3-5mm; hydrating: the prepared balls is hydrated by steam with temperature of 95-100DEG C for 6-8 hours; and baking finished product: hydrated filtering material is conveyed into an electro-thermal rotary furnace for activated baking to obtain the finished material. The invention has advantages that effective adsorption capability of the filtering material prepared by the method is 16% to HS, adsorption specific surface area of aluminum oxide is increased, and purification efficiency is improved. The material can be applied for air purifying device, so that the air purifying device can be widely applied for instrument chamber of petrochemistry industry, paper making industry and metallurgy industry, thereby effectively avoiding acid erosion of HS to instruments.

Description

technical field [0001] The invention relates to a processing technology of acid removal filter material, which uses alumina as a carrier, and through a special processing technology, the surface of the internal pores is uniformly covered with potassium permanganate material, and the effective content of potassium permanganate is 7-10%. between. Background technique [0002] The prior art adopts the impregnation method to impregnate activated alumina balls into a certain proportion of potassium permanganate solution, and remove and dry them after impregnating for a period of time. The disadvantage of this method is that the potassium permanganate material will occupy the inner pores of alumina, reduce the activity of alumina, and reduce the specific surface area for alumina adsorption. Even though the content of potassium permanganate may be higher in the material obtained by this method, the purification efficiency is very low. Contents of the invention [0003] The obje...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/30B01J20/08
Inventor 李隆峰
Owner AIKANG AIR PROCESSING SYST BEIJING
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