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Method and device for producing sodium hypochlorite

A production method and technology for sodium hypochlorite, applied in the directions of hypochlorous acid, hypochlorite, etc., can solve the problems such as no reports on the high-efficiency automated sodium hypochlorite production process, and achieve the suppression of side reactions, the improvement of utilization rate, and the uniformity of cooling. Effect

Active Publication Date: 2014-11-05
北京万水净水剂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] High-efficiency automated sodium hypochlorite production process has not been reported

Method used

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  • Method and device for producing sodium hypochlorite
  • Method and device for producing sodium hypochlorite

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Experimental program
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Effect test

Embodiment 1

[0073] In the following embodiments, the first time interval is set to 10 minutes, and the second time interval is set to 3 minutes, wherein the second time interval provides a basis for the control device to accurately determine changes in pH and temperature values.

[0074] The production method of the present invention includes two stages-a start-up section and a production control section.

[0075] (1) Startup section

[0076] Add 8000kg of 15% sodium hydroxide solution into the reactor. Before starting production, monitor the initial temperature of the sodium hydroxide solution through a temperature detection device, and determine whether to turn on the cooling device according to the initial temperature. The relatively larger temperature value T of the two initial temperature values ​​detected by the high-level temperature detection device and the low-level temperature detection device of the present invention max Meet T max When >25°C, turn on the internal cooling dev...

Embodiment 2 Embodiment 10

[0085] The following embodiment two ~ embodiment ten all adopt the same method as embodiment one, the sodium hydroxide consumption remains constant, and each step parameter in the implementation process is all consistent. The results of each embodiment are shown in Table 1.

[0086] Table 1

[0087]

[0088] The utilization rate of liquid chlorine in the present invention reaches 99.68%-99.95%, and the utilization rate of sodium hydroxide reaches 99.10-99.90%, which reduces the reject rate of the product, and the available chlorine content of the product sodium hypochlorite is more than or equal to 11.5%.

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Abstract

The invention discloses a method and a device for producing sodium hypochlorite. The method comprises the steps as follows: adding a caustic soda solution into a reactor; adding chlorine, adjusting the chlorine adding speed of a chlorine adding device according to a temperature value, controlling the opening and closing of a cooling device to enable the temperature value of the reaction liquid to be not more than 45 DEG C, and adjusting the chlorine adding speed of the chlorine adding device according to the pH value to enable the pH value of the reaction liquid to be not less than 10; and the reaction is finished when the pH value of the reaction liquid is kept less than 12 within a first time interval. The device comprises the reactor, the chlorine adding device, a pH value detection device, a temperature detection device, the cooling device and a control device. According to the device and the method provided by the invention, accuracy control of the production process is realized, side reaction is suppressed, the reaction end point can be judged accurately, chlorination reaction is avoided, the utilization ratio of liquid chlorine reaches 99.68 to 99.95 percent, and the available chlorine content of the sodium hypochlorite is greater than or equal to 11.5 percent. According to the device provided by the invention, automatic control of the production process of the sodium hypochlorite is realized, manual labor and material resources are saved, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the field of sodium hypochlorite production, in particular to a production method and device for sodium hypochlorite. Background technique [0002] Both sodium hypochlorite and chlorine gas have strong oxidizing properties, and both can be used as ideal disinfectants in the field of water treatment. In the existing water treatment field, chlorine gas is generally used as a disinfectant. With the development of society and the construction of cities, units using chlorine gas are gradually surrounded by commercial areas and residential areas, but there is a high leakage of chlorine gas during transportation and use. Therefore, safer and more stable disinfectants will inevitably replace chlorine. The danger of sodium hypochlorite is very low, and it has high safety in the process of transportation and use. It will gradually replace chlorine in the field of water treatment, and the market prospect is promising. [0003] At presen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B11/06
Inventor 陈荣来李涛陈禹武仁超
Owner 北京万水净水剂有限公司