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Sodium pyrosulfite production device

A technology for sodium metabisulfite and production equipment, which is applied in the preparation of alkali metal sulfites, alkali metal sulfites/sulfites, inorganic chemistry, etc. Poor environment and other problems, to achieve the effects of controllable product quality differences, small resistance, and convenient maintenance

Inactive Publication Date: 2021-07-16
NANJING LIUYAN ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides a sodium pyrosulfite production device to overcome the unstable quality of sodium pyrosulfite production in the prior art, poor crystallization uniformity and equipment SO 2 The defects of large amount of emission and poor production environment

Method used

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  • Sodium pyrosulfite production device

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Embodiment 1

[0019] Such as figure 1 Shown, a kind of sodium metabisulfite production plant comprises crystallizer 1, and its top side is provided with defoamer 3, and the other side is provided with jet reactor 6, and its below is provided with crystal discharge section 10, and described crystal discharge section 10 is provided with a circulation pump 9 on one side and a crystal discharge pump 12 on the other side.

[0020] One side of the outer wall of the crystallizer 1 is provided with a raw material liquid interface 2 for regularly adding crystal feed liquid 105 to the crystallizer, and the other side is provided with a detection instrument interface 13 for reaction crystallization process control and reaction degree monitoring.

[0021] The top of the defoaming device 3 is provided with a reaction tail gas interface 5, and its side wall is provided with a flushing water interface 4 that facilitates the flow of flushing water 103. The top of the jet reactor 6 is provided with a feed g...

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Abstract

The invention discloses a sodium pyrosulfite production device which comprises a reaction crystallizer, a circulating pump, a crystal discharge pump and corresponding pipelines, a jet device is arranged at the top of the reaction crystallizer, a circulating liquid outlet is formed in the side face of the barrel of the reaction crystallizer and connected with the inlet of the circulating pump, and the outlet of the circulating pump is connected with a circulating liquid inlet of the jet device. The circulating pump and the reaction crystallizer are connected through the pipeline to form a circulating loop, a defoaming device is arranged at the top of the reaction crystallizer, reacted gas is discharged from the upper part of the defoaming device, a crystal discharge device is arranged at the lower part of the reaction crystallizer and is provided with a crystal discharge port, and the crystal discharge port is connected with the inlet of the crystal discharge pump. A detection instrument interface is arranged on the side surface of the reaction crystallizer barrel and is used for monitoring the temperature, pH and density of reaction materials; according to the invention, sodium pyrosulfite reaction and crystallization are integrated, continuous operation can be realized, the production efficiency is high, the reaction is thorough, and the prepared product is uniform in granularity and good in purity.

Description

technical field [0001] The invention relates to a sodium pyrosulfite production device, which belongs to the technical field of chemical production. Background technique [0002] Our country is a big resource production and consumption country, but at the same time of production and consumption, there are also major environmental problems. In recent years, resource recovery desulfurization technologies have been applied on a large scale, such as organic amine desulfurization technology and activated carbon desulfurization technology, and the desulfurization by-products are SO 2 . The traditional approach is to put the SO 2 Sulfuric acid is made of sulfuric acid. Due to the excess production capacity of sulfuric acid in China at this stage, the market demand is greatly affected by the region, and sulfuric acid is difficult to store and transport, and there is a risk of inventory expansion, and the economic value is low. 2 The production of sodium metabisulfite can achieve ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/26B01D9/02C01D5/14
CPCB01J19/26B01D9/0063C01D5/145B01D2009/0086
Inventor 刘大华徐延忠陈任远
Owner NANJING LIUYAN ENVIRONMENTAL PROTECTION TECH CO LTD
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