A kind of production technology of sodium sulfite

Abstract

The invention discloses a production technology of sodium sulfite. The production technology comprises the steps of firstly, preparing a sodium carbonate solution through a mixer, then filtering smokethrough a purifier, conducting a reaction in a reactor, preparing a sodium hydrogen sulfite solution, then adding a sodium carbonate solution to adjust the pH of reaction liquor to be 7-8, and finally conducting concentrating, centrifugation and drying to obtain a sodium sulfite solid. Electromagnetic valves are connected to the exteriors of the mixer and the purifier, a turbine flowmeter is connected between the mixer and the reactor, a turbine flowmeter is connected between the purifier and the reactor, and computer control equipment is further arranged; the electromagnetic valves, the mixer, the purifier, the reactor and the turbine flowmeters are all electrically connected with the computer control equipment. According to the production technology, automated control can be achieved. By means of the production technology, the purity of sodium sulfite can be increased, and automated control can be conducted to meet the requirement for safety; by means of the production technology, SO2 is effectively and sufficiently absorbed, and through the further utilization of automated control equipment, automated control over production is achieved, and the production safety is improved.

Description

technical field [0001] The invention belongs to the technical field of flue gas pollution prevention and control, and in particular relates to a production process of sodium sulfite. Background technique [0002] Petroleum refining industry is very closely related to the development of our country's national economy. No matter industry, agriculture, transportation and national defense construction are inseparable from petroleum products. The crude oil in petroleum is mostly sulfur-containing crude oil, which will produce a large amount of sulfur-containing flue gas during processing, which seriously pollutes the environment. [0003] Currently, in order to remove the acidic H produced during petroleum processing 2 Flue gas such as S (hydrogen sulfide) usually puts sulfur-containing flue gas into the combustion furnace for combustion to generate SO 2 (sulfur dioxide) and other flue gas, and then use the mixed solution of sodium sulfite / sodium bisulfite as the absorption liq...

AI Technical Summary

Problems solved by technology

[0005] However, the above-mentioned process cannot realize automatic production, and the safety monitoring of the equipment cannot be realized. At the same time, the labor cost is relatively high, and its purpose is desulfurization treatment. 2 The purification does not pay attention to the efficiency and the product quality of sodium sulfite, and the prepared sodium sulfite needs further processing to meet the subsequent use requirements

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