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Process and apparatus for preparing sodium sulfite in production of ion-film caustic soda

A technology of ionic membrane caustic soda and sodium sulfite, which is applied in the field of chemical technology, can solve the problem of high procurement cost, and achieve the effect of reducing production cost and pollution

Inactive Publication Date: 2010-06-30
聊城鲁西氯甲烷化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Manufacturers need to purchase solid sodium sulfite externally for dissolving, and configure it into a 10% solution for blending, and the purchase cost is relatively high

Method used

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  • Process and apparatus for preparing sodium sulfite in production of ion-film caustic soda
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  • Process and apparatus for preparing sodium sulfite in production of ion-film caustic soda

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Embodiment 1

[0017] A preparation process of sodium sulfite in the production of ion-exchange membrane caustic soda, which transports 32% of the total mass of caustic soda in the ion-exchange membrane caustic soda device to the caustic soda dissolving tank, is prepared into a sodium hydroxide solution with a mass concentration of 5%, and then oxidizes the The sodium solution is sent to the tail gas recovery tower to react with the sent sulfur dioxide tail gas to produce a sodium sulfite solution with a mass concentration of 10%, and the sodium sulfite solution is then sent to the ion-exchange membrane caustic soda plant for continued use.

[0018] The equipment for the preparation process of sodium sulfite in ion-exchange membrane caustic soda production includes caustic soda dissolving tank 2 connected to ion-exchange membrane caustic soda plant 1, caustic soda dissolving tank 2 is connected to tail gas recovery tower 3 through pipelines, tail gas recovery tower 3 communicates with sulfur d...

Embodiment 2

[0020] A preparation process of sodium sulfite in the production of ion-exchange membrane caustic soda, which transports 32% of the total mass of caustic soda in the ion-exchange membrane caustic soda plant to the caustic soda dissolving tank, and is prepared into a sodium hydroxide solution with a mass concentration of 8%, and then oxidizes the The sodium solution is sent to the tail gas recovery tower to react with the sent sulfur dioxide tail gas to produce a sodium sulfite solution with a mass concentration of 10%, and the sodium sulfite solution is then sent to the ion-exchange membrane caustic soda plant for continued use.

[0021] The equipment of the preparation technology of sodium sulfite in ion membrane caustic soda production is with embodiment 1.

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Abstract

The invention relates to a process and an apparatus for preparing sodium sulfite in the production of ion-film caustic soda, and belongs to the technical field of chemical processes. In the process, part of caustic soda in an ion-film caustic soda device is delivered to a caustic soda dissolving tank by utilizing the apparatus so as to prepare a sodium hydroxide solution with a certain concentration; the sodium hydroxide solution is delivered to a tail gas recovery tower to react with the delivered sulfur dioxide tail gas, thereby producing a sodium sulfite solution with the mass concentration of 10%; and the sodium sulfite solution is delivered to the ion-film caustic soda device for later use. The process of the invention greatly reduces the production cost, saves the energy, reduces the consumption and reduces the pollution.

Description

Technical field: [0001] The invention relates to a caustic soda production process, in particular to a preparation process and equipment for sodium sulfite in ion membrane caustic soda production, and belongs to the technical field of chemical engineering. Background technique: [0002] In the ionic membrane caustic soda production process, 2 kg of sodium sulfite needs to be added for every ton of caustic soda produced. Manufacturers need to purchase solid sodium sulfite externally for dissolving, and configure it into a 10% solution for blending and use, and the purchase cost is relatively high. Invention content: [0003] The purpose of this invention is to provide a kind of preparation technology of sodium sulfite in the production of ionic membrane caustic soda. [0004] Another object of the present invention is to provide the equipment of the preparation technology of sodium sulfite in the production of this kind of ionic membrane caustic soda. [0005] The technic...

Claims

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Application Information

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IPC IPC(8): C01D5/14
Inventor 于召刚殷会强胥利陈仲科
Owner 聊城鲁西氯甲烷化工有限公司
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