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High-pressure dechlorination method and sodium hypochlorite preparation method

A dechlorination and high-pressure technology, applied in the direction of hypochlorous acid, hypochlorite, chlorine/hydrogen chloride, etc., can solve the problems of environmental pollution, low recovery rate of chlorine gas, and low recycling efficiency, so as to improve recovery efficiency and improve The effect of blow-off efficiency

Pending Publication Date: 2022-05-24
BLUESTAR BEIJING CHEM MACHINERY
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Problems solved by technology

[0004] In view of the above problems, the present application provides a high-pressure dechlorination method and a method for preparing sodium hypochlorite, which can solve the problems of low recovery rate of chlorine gas, low recycling efficiency, and environmental pollution in the process of making alkali from electrolyte

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  • High-pressure dechlorination method and sodium hypochlorite preparation method

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[0041] The embodiments of the technical solutions of the present application will be described in detail below. The following examples are only used to illustrate the technical solutions of the present application more clearly, and are therefore only used as examples, and cannot be used to limit the protection scope of the present application.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of this application; the terms used herein are for the purpose of describing specific embodiments only, and are not intended to Limiting this application; the terms "comprising" and "having" and any variations thereof in the description and claims of this application are intended to cover non-exclusive inclusion.

[0043]In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish differen...

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Abstract

The invention discloses a high-pressure dechlorination method and a sodium hypochlorite preparation method, and the dechlorination method comprises the following steps: adding hydrochloric acid into saline water, and adjusting the pH value of the saline water to 1.2-1.8; the saline water with the adjusted pH value is drained into a chlorine gas separation chamber; the introduced saline water is sprayed out under the pressure intensity of 0.3 MPa, the hole diameter of each spraying hole is 0.9 mm, and the saline water spraying flow speed is maintained to be 8.5-14.1 m / s; a gas pump is used for blowing gas with inactive properties from the second side end of the chlorine gas separation chamber to saline water sprayed by spraying equipment, so that the equilibrium concentration of chlorine in a liquid phase interface in the saline water is broken, and chlorine in a liquid phase is continuously transferred to a gas phase; chlorine in a gas phase state is discharged through a gas outlet formed in the third side end or the fourth side end of the chlorine gas separation chamber. The method is high in dechlorination efficiency, obvious in effect, environment-friendly and energy-saving.

Description

technical field [0001] The present application relates to electrolyte brine dechlorination technology, in particular to a high-pressure dechlorination method and a method for preparing sodium hypochlorite. Background technique [0002] At present, with the continuous emphasis on environmental protection and energy saving, the recovery and reuse of chlorine gas in the process of alkali production is very important for environmental protection. On the one hand, if the chlorine gas in the brine is not treated, the chlorine content in the brine will be relatively large, and the chlorine-containing brine cannot be reused. If the brine is discharged, it will cause serious environmental pollution. Specifically, when the brine is electrolyzed through an electrolytic cell, an electrochemical reaction occurs in the electrolytic cell to generate chlorine gas, and the chlorine gas is dissolved in the electrolyzed light brine to dissolve chlorine and ClO. - form exists. The free chlori...

Claims

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Application Information

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IPC IPC(8): C25B15/08C01D3/14C01B11/06C01B7/07
CPCC25B15/085C01D3/14C01B7/0743C01B11/062Y02P20/10
Inventor 单明月王刚裴允彤张杰张涛王浩洋
Owner BLUESTAR BEIJING CHEM MACHINERY
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