Technology control method of production process of ferric trichloride and reaction tower

Abstract

The invention discloses a technology control method of the production process of ferric trichloride and a reaction tower. The technology control method comprises the steps that the opening degree of achlorination controller is conditioned according to the temperature, the pressure, the inlet gas flux and the tail gas flux in the reaction tower, and the reaction temperature lower than 90 DEG C, the pressure lower than 0.05 MPa, and the tail gas flux of the inlet gas flux smaller than 5% in the reaction tower is controlled; and the condition that the opening degree of the chlorination controller is lower than 10%, and the exhaust gas pipe flux is larger than the inlet gas pipe flux is taken as a reaction ending point to judge. The system device comprises a temperature sensor, a pressure sensor, a flux monitoring device and the chlorination controller. The technology control method achieves accurate control of the production process of ferric trichloride, the utilization rate of chlorineis improved to reach 95.5-99.5%, the reaction ending point is accurately judged, the product pass percent is improved to reach 99.8%, and the content of ferrous chloride is lower than 0.25%. The technology control method improves the safety of the production technology of ferric trichloride, the utilization rate of the raw materials and the production efficiency.

Description

technical field [0001] The invention relates to the field of ferric chloride production, in particular to a process control method and a reaction tower in the ferric chloride production process. Background technique [0002] As a basic chemical reagent, ferric chloride has certain corrosiveness and can be used as a raw material in basic chemical industries such as the etching industry. It is also widely used as a water treatment coagulant and as a water treatment agent. It is widely used in chemical phosphorus removal and turbidity reduction in the field of sewage treatment, and in sludge treatment because of its good dehydration effect. [0003] As a coagulant in drinking water treatment, it is also widely used because of its fast coagulation speed, less restrictions on use conditions, and fast sedimentation speed. With the emphasis on the environmental protection industry, ferric chloride is widely used in water treatment and sewage The field of mud treatment will be wide...

AI Technical Summary

Problems solved by technology

[0007] However, in the production of ferric chloride by chlorination, the raw material chlorine gas is highly toxic, so production safety and tail gas emissions must be strictly controlled. During the reaction, temperature and pressure are extremely important to protect the safety of equipment. Excessive temperature or pressure will cause serious problems. Affect the safety and airtightness of production equipment, causing chlorine gas leakage

[0008] Further, the end point of the reaction is a key factor of product quality, and the end point control often occurs in advance or lags behind. The end of chlorination in advance causes ferrous chloride to exceed the standard, and repeated chlorine additions often occur in the production process. The end point control lags behind, and chlorine gas is excessive. There will be a great risk of leakage, and at the same time cause a large waste

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