Method and device for producing sodium hypochlorite

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...

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