Raw material proportioning and adding device for sodium sulfite preparation

Abstract

The invention discloses a raw material proportioning and adding device for sodium sulfite preparation, and relates to the technical field of sodium sulfite production. The device comprises a filtering tank, a storage tank, a reaction kettle, a solution tank and a PLC control cabinet; the filtering tank is connected with a first conveying pipeline through a flange and connected with the storage tank through the first conveying pipeline, the first conveying pipeline is provided with a first electromagnetic flow valve, the storage tank is provided with a second conveying pipeline, and the second conveying pipeline is connected with the reaction kettle. According to the raw material proportioning and adding device for sodium sulfite preparation, the volume of a solution needing to be proportioned and the volume of SO2 gas are input into the PLC control cabinet, the PLC control cabinet controls the liquid inlet solenoid valve and the gas inlet solenoid valve to start to work to make the solution and the SO2 gas input into the reaction kettle, and the first stirrer is turned on for mixing and stirring, so that the proportioning of the solution is complete and uniform; and sodium sulfite is prepared by presetting the proportioning amount, so that the production efficiency and quality are improved.

Description

technical field [0001] The invention relates to the technical field of sodium sulfite production, in particular to a raw material proportioning and adding device for sodium sulfite preparation. Background technique [0002] Sodium sulfite is an inorganic substance, common sulfite, white, monoclinic crystal or powder, which is irritating to eyes, skin and mucous membranes, can pollute water sources, and is decomposed by high heat to produce toxic sulfide fumes. It is mainly used in industry Used in the production of cellulose sulfite, sodium thiosulfate, organic chemicals, bleaching fabrics, etc. It is also used as a reducing agent, preservative, dechlorination agent, etc. Sodium sulfite is easily weathered in the air and oxidized to sodium sulfate. When it loses crystal water, it will melt into a mixture of sodium sulfide and sodium sulfate when reheated. The density of anhydrous is 2.633, which is much slower than the oxidation of hydrate. It decomposes into corresponding ...

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Problems solved by technology

[0003] Sodium sulfite is an important reducing agent. In industry, sodium sulfite is generally produced by wet process. SO2 is countercurrently contacted with the preparation solution in the reactor to generate sodium bisulfite. Sodium bisulfite is supersaturated to precipitate sodium sulfite crystals, and then centrifugally dried. The finished product, because SO2 gas is not easy to store, its chemical properties are active, and it is easy to pollute the environment. Therefore, when the enterprise produces it, it is generally ready-to-use, and the production of SO2 gas usually uses a sulfur incinerator, but if the gas produced by burning sulfur is directly As SO2 gas raw material, the problem of overheating is prone to occur in the production reaction, and the product is also prone to high impurity content

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