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A method for preventing the scabbing of the pre-ash bucket in the distillation process in the production of soda ash by the ammonia-soda method

A pre-ash bucket and ammonia-alkali process technology, applied in carbonate preparations and other directions, can solve the problems of reducing system production capacity, production fluctuations, increasing overhaul and maintenance costs, etc., to increase reflux flushing and friction, and improve utilization efficiency. , the effect of reducing consumption

Active Publication Date: 2022-06-07
山东海天生物化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Stopping the tower for inspection and maintenance of the pre-ash bucket will reduce the production capacity of the system, and at the same time lead to production fluctuations and increase inspection and maintenance costs

Method used

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  • A method for preventing the scabbing of the pre-ash bucket in the distillation process in the production of soda ash by the ammonia-soda method
  • A method for preventing the scabbing of the pre-ash bucket in the distillation process in the production of soda ash by the ammonia-soda method
  • A method for preventing the scabbing of the pre-ash bucket in the distillation process in the production of soda ash by the ammonia-soda method

Examples

Experimental program
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Effect test

Embodiment 1

[0025] A method for preventing the scarring of a pre-ash barrel in a distillation process in the production of soda ash by an ammonia-alkali method. A return pipe is arranged on the side of the pre-ash barrel close to the bottom, and the blended liquid that is stirred and mixed by lime milk and preheated mother liquor through the pre-ash barrel is pumped in a reflux pump. Under the action of the return pipe, the turbid liquid returns from the upper part of the pre-ash bucket into the interior of the pre-ash bucket (the return flow of the blending liquid is 360m 3 / h). The distance between the outlet centerline of the return pipe and the bottom of the pre-ash bucket is 12-15cm, and the diameter of the return pipe is 18-22cm.

[0026] The pre-ash barrel includes a barrel, and the upper side of the barrel is provided with a turbid liquid return inlet pipe, the distance between the center line of the turbid liquid return inlet pipe and the top of the barrel is 300cm, and the cente...

Embodiment 2

[0029] A method for preventing the scarring of a pre-ash barrel in a distillation process in the production of soda ash by an ammonia-alkali method. The blended liquid that is stirred and mixed by lime milk and pre-heated mother liquor through the pre-ash barrel enters a separator, and the bottom turbid liquid separated by the separator passes through a reflux pump. (The return flow is 370m 3 / h) The turbid liquid reflux inlet pipe set on the upper part of the pre-ash barrel enters the interior of the pre-ash barrel, and the supernatant liquid separated by the separator enters the distillation column.

[0030]The separator includes a body made of carbon steel, and the body includes a straight barrel section and a cone barrel section that are integrally structured and connected to each other. The height ratio of the straight barrel section and the cone barrel section is 2:3; the top center of the straight barrel section is provided with an upper The clear liquid outlet, the upp...

Embodiment 3

[0034] A method for preventing the scarring of a pre-ash barrel in a distillation process in the production of soda ash by an ammonia-alkali method. The blended liquid that is stirred and mixed by lime milk and pre-heated mother liquor through the pre-ash barrel enters a separator, and the bottom turbid liquid separated by the separator passes through a reflux pump. (The return flow is 370m 3 / h) The turbid liquid reflux inlet pipe set on the upper part of the pre-ash barrel enters the interior of the pre-ash barrel, and the supernatant liquid separated by the separator enters the distillation column.

[0035] The separator includes a body made of carbon steel, and the body includes a straight barrel section and a cone barrel section that are integrally structured and connected to each other. The height ratio of the straight barrel section and the cone barrel section is 2:3; the top center of the straight barrel section is provided with an upper The clear liquid outlet, the up...

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Abstract

The invention relates to the technical field of soda ash production, in particular to a method for preventing scabbing of a pre-ash tank in the distillation process in the production of soda ash by the ammonia-soda method. The blended liquid stirred and mixed by the pre-ash bucket enters the inside of the pre-ash bucket from the turbid liquid return pipe on the upper part of the pre-ash bucket through the return pipe. The method can prevent scarring of the pre-ash bucket, and the pre-ash bucket can realize continuous and stable operation, improve the stability and continuity of the entire system of soda ash production, reduce environmental risks, improve equipment utilization, increase production capacity, and thereby reduce manufacturing costs.

Description

technical field [0001] The invention relates to the technical field of soda ash production, in particular to a method for preventing the scarring of pre-ash barrels in a distillation process in the production of soda ash by an ammonia-alkali method. Background technique [0002] Ammonia soda ash production enterprises generally use sea salt and limestone as raw materials for alkali production, and sea salt contains about Ca 2+ 0.29%, Mg 2+ 0.12%, SO 4 2- 0.95%, at the same time, in order to save fresh water resources, production enterprises often use seawater as salt water, and seawater contains about Ca 2+ 0.63tt, Mg 2+ 1.89tt, SO 4 2- 0.91tt. In order to recover the ammonia in the preheated mother liquor in the current ammonia-alkali soda ash production process, the lime milk and the preheated mother liquor (the preheated mother liquor refers to the carbonization mother liquor through the calcination process mother liquor combined tower and the distillation process ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01D7/18
CPCC01D7/18
Inventor 丁思颂王军民郭常伟
Owner 山东海天生物化工有限公司
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