Pre-ash bucket sealing method

Abstract

The invention provides a pre-ash bucket sealing method, and relates to the field of alkali making equipment. The pre-ash bucket sealing method comprises a pre-ash bucket sealing device, the pre-ash bucket sealing device comprises a sealing flange connected with a bucket cover of a pre-ash bucket, an upper sealing cylinder and a lower sealing cylinder are fixedly arranged on the sealing flange, theupper sealing cylinder is arranged above the bucket cover of the pre-ash bucket, and the lower sealing cylinder extends into the pre-ash bucket; a stirring shaft in the pre-ash bucket penetrates through the upper sealing cylinder and the lower sealing cylinder; a stuffing box is arranged between the upper sealing cylinder and the stirring shaft; a sleeve is arranged below the lower sealing cylinder, a spacer bush rotationally sleeving the stirring shaft is arranged in the sleeve, and the spacer bush is filled with adsorption filler; a sealing ring sleeves outside the spacer bush, a pressing plate is arranged at the top of the spacer bush, a lantern ring is arranged at the lower part of the pressing plate, a sealing liquid channel is formed among the lantern ring, the bottom of the lower sealing cylinder, the sealing ring and the pressing plate, the sealing liquid channel is communicated with an inner cavity of the upper sealing cylinder to form a liquid sealing cavity, and sealing liquid fills the liquid sealing cavity; and the sealing liquid is a mixed solution of grease and crushed filler. The pre-ash bucket is good in sealing performance and greatly reduces the cost.

Description

technical field [0001] The invention relates to the field of alkali-making equipment, in particular to a method for sealing a pre-ash bucket. Background technique [0002] In the production process of the alkali industry, it is necessary to react the mother liquor and lime milk with ammonium chloride and calcium hydroxide in the pre-ash bucket, decompose the combined ammonia into free ammonia, and then recycle the ammonia and carbon dioxide; but in actual production, When the stirring shaft is used to stir the materials in the pre-ash bucket, the sealing of the connection between the stirring shaft and the bucket body is poor, which makes the ammonia gas leak out, reduces the product yield and affects the working environment. [0003] At present, mercury rotary seals are usually used in soda production. Mercury is poisonous, and leakage will cause pollution, which is not conducive to maintenance, and the cost of mercury is high, which is not conducive to industry promotion. ...

AI Technical Summary

Problems solved by technology

[0002] In the production process of the alkali industry, it is necessary to react the mother liquor and lime milk with ammonium chloride and calcium hydroxide in the pre-ash bucket, decompose the combined ammonia into free ammonia, and then recycle the ammonia and carbon dioxide; but in actual production, When the stirring shaft is used to stir the materials in the pre-ash bucket, the sealing of the joint between the stirring shaft and the bucket body is poor, which makes the ammonia gas leak out, reduces the product yield and affects the working environment

[0003] At present, mercury rotary seals are usually used in soda production. Mercury is poisonous, and leakage will cause pollution, which is not conducive to maintenance, and the cost of mercury is high, which is not conducive to industry promotion. Therefore, it is urgent to provide a method that has good sealing performance and can effectively replace mercury seals.

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