Method and apparatus for preparing sulphur dioxide gas

Abstract

The invention discloses a method for generating sulfur dioxide gas and a device thereof. The method takes water-sulfur slurry as raw material, the water-sulfur slurry is successively and automatically fed into a primary combustion chamber by a feeding device, firstly the water-sulfur slurry is vaporized by pumping in a small amount of primary air, then secondary air is added in so as to lead sulfur to be fully burned and to generate SO2 gas, furthermore, the SO2 gas is cooled so as to prepare purified sulfur gas. The water-sulfur slurry is emulsion colloid sulfur or suspended sulfur solution, which is prepared by mixing sulfur particles with water. The device used for producing the sulfur dioxide gas comprises a brimstone furnace which consists of a combustion chamber, a safety hood and a lower base, and a SO2 gas cooling device, wherein, the combustion chamber is a vertically cylindrical vessel, the middle part of the vessel is provided with a porous separator which divides the combustion chamber into a primary combustion chamber and a secondary combustion chamber, wherein, the bottom of the primary combustion chamber is provided with a feeding device, a heating device and a ignition device, and the lower parts of the primary combustion chamber and the secondary combustion chamber are respectively provided with a primary air inlet duct and a secondary air inlet duct. The content of sublimed sulfur in the SO2 gas generated by using the method and the device is zero or is close to zero, and no or very little SO3 is generated.

Description

Technical field: [0001] The invention relates to a production method and device for sulfur dioxide gas. Background technique: [0002] SO 2 It is an important auxiliary raw material in the sugar production process. It is combined with Ca(OH) in the clarification process 2 The reaction produces CaSO 3 , so that the colloidal pigment is removed by adsorption and the sugar juice is clarified; in addition, SO 2 It can weaken or inhibit the formation of new pigments in the process of sugar production, including clarification, evaporation and cooking, and can reduce the discoloration of white sugar during storage. It has a quite obvious effect on reducing colored substances in various sugar products. Therefore, SO 2 It plays a very important role in the production process of sugar factory. [0003] SO used in sugar mills 2 At present, it is obtained by burning sulfur. In the process of sulfur combustion, if the combustion control is not good, it will lead to the sublimation ...

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Problems solved by technology

Therefore, the control of sulfur combustion is very important, but currently the production of SO 2 method is difficult to control sublimated sulfur or SO 3 generation; secondly, due to the production process, SO 2 The dosage of SO is not balanced, and needs to be changed according to production needs. Solid S is used for melting and burning, but it is only surface burning, and it is not easy to control SO. 2 production volume

[0004] Furthermore, the above production SO 2 The devices used in the gas method are still prepared by batch type sulfur burning furnace so far. This kind of sulfur burning furnace has problems of sublimation, pipe blockage, SO 2 (Flow and concentration) Irregular supply, more SO 3 Many problems such as generation, waste caused by excessive sulfur combustion, irregular pH value of sulfur smoked juice, etc.

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