High-concentration sodium hypochlorite co-production device and method

A sodium hypochlorite, high-concentration technology, applied in the direction of hypochlorous acid, hypochlorite, chemical instruments and methods, etc., can solve problems such as sodium hypochlorite, blocked tubes, and affecting heat transfer of tubes in falling film absorbers, etc., to achieve The effect of complete reaction and exothermic balance

Pending Publication Date: 2020-02-21
宁夏华御化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, falling film absorbers are mostly used to produce sodium hypochlorite. When using falling film absorbers to produce sodium hypochlorite, the temperature control requirements are very strict. Since the reaction between chlorine gas and sodium hydroxide is an exothermic reaction, if the temperature is too high, it is not conducive to the progress of the reaction. , it is difficult to produce 15% sodium hypochlorite stably. If the temperature is too low, crystallization will occur in the falling film absorber and block the tubes, which will affect the heat transfer of the tubes in the falling film absorber. It is also difficult to stably produce 15% sodium hypochlorite. sodium hypochlorite

Method used

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  • High-concentration sodium hypochlorite co-production device and method
  • High-concentration sodium hypochlorite co-production device and method

Examples

Experimental program
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Effect test

Embodiment 1

[0048] Embodiment 1: Sodium hydroxide solution is mixed with 5m 3 The flow rate of / h passes into the receiving chamber from the liquid phase inlet of the upper head 12, and after the sodium hydroxide solution fills the bottom surface of the receiving chamber, it flows into the cooling row pipe 114 from a plurality of overflow grooves 1141 densely distributed on the upper end surface of the cooling row pipe 114 In the tube, the sodium hydroxide solution flows down into the collection chamber along the inner wall of the cooling tube 114, and forms a liquid film with a uniform thickness on the inner wall of the cooling tube 114, and passes excess dry chlorine gas from the gas phase inlet of the upper head 12 into the receiving chamber. Chlorine gas flows downward along the inner wall of the cooling tube 114, and reacts with the sodium hydroxide on the inner wall of the cooling tube 114, and sends the reaction product in the collection chamber into the middle tank 20, and detects ...

Embodiment 2

[0049] Embodiment 2: Sodium hydroxide solution is mixed with 5m 3 The flow rate of / h passes into the receiving chamber from the liquid phase inlet of the upper head 12, and after the sodium hydroxide solution fills the bottom surface of the receiving chamber, it flows into the cooling row pipe 114 from a plurality of overflow grooves 1141 densely distributed on the upper end surface of the cooling row pipe 114 In the tube, the sodium hydroxide solution flows down into the collection chamber along the inner wall of the cooling tube 114, and forms a liquid film with a uniform thickness on the inner wall of the cooling tube 114, and passes excess dry chlorine gas from the gas phase inlet of the upper head 12 into the receiving chamber. Chlorine gas flows downward along the inner wall of the cooling tube 114, and reacts with the sodium hydroxide on the inner wall of the cooling tube 114, and sends the reaction product in the collection chamber into the middle tank 20, and detects ...

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Abstract

The invention discloses a high-concentration sodium hypochlorite co-production device comprising a falling film absorber, an intermediate tank and a tail gas tower; the falling film absorber comprisesa cooling cylinder, an upper seal head and a lower seal head. The cooling cylinder comprises a cylinder body, an upper end cover, a lower end cover and a plurality of cooling tube nests. In the high-concentration sodium hypochlorite co-production device, the upper ends of the cooling tube nests exceed the upper end cover by a certain height, and the upper ends of the plurality of cooling tube nests are flush with one another, so after a sodium hydroxide solution continuously enters a receiving chamber, the liquid level of the sodium hydroxide solution in the receiving chamber is relatively stable, and the sodium hydroxide solution can relatively uniformly enter each cooling tube nest; overflow grooves are evenly and densely distributed in the upper end faces of the cooling tube nests, sothe sodium hydroxide solution can uniformly flow in all the positions in the circumferential direction of the cooling tube nests, formation of a liquid film layer with the uniform thickness on the inner walls of the cooling tube nests is facilitated, and stable preparation of sodium hypochlorite with concentration of 15% can be facilitated. The invention further provides a high-concentration sodium hypochlorite co-production method.

Description

technical field [0001] The invention relates to the technical field of sodium hypochlorite production, in particular to a high-concentration sodium hypochlorite co-production device and method. Background technique [0002] Sodium hypochlorite is a high-efficiency oxidant and chlorine-containing disinfectant. It is used as a bleaching agent, oxidizing agent and water purifier for papermaking, textile, light industry, etc. It has the functions of bleaching, sterilization and disinfection. It has strong oxidation ability, fast action and good effect, and its functions are very extensive. The preparation methods of sodium hypochlorite in the prior art mainly include brine electrolysis, chlorine gas and sodium hydroxide contact reaction. At present, falling film absorbers are mostly used to produce sodium hypochlorite. When using falling film absorbers to produce sodium hypochlorite, the temperature control requirements are very strict. Since the reaction between chlorine gas a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B11/06
CPCC01B11/062
Inventor 顾家立赵伟王燕斌王西安聂昌金
Owner 宁夏华御化工有限公司
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