Process for preparing carbon disulphide by using circulating fluid bed

Abstract

The invention relates to a production method for a compound comprising carbon and sulfur, in particular to the technology for preparing carbon bisulfide by a circulating fluid bed, which aims at solving the problems of high energy consumption, discontinuous production process, serious environment pollution and the like in the existing production technology. The method comprises the following steps: carbonic solid substances are sent to a fluidized bed furnace, the heated carbonic solid substances are then sent to a pre-raiser, a lift pipe and a fluidized bed layer and contact and react with sulfur, a quick separation device and a settler are used for separating the gaseous carbon bisulfide out, and the rest unreacted carbonic solid substances fall in a stripping section under the settler, and return to the fluidized bed furnace to be heated after the entrained carbon bisulfide gas is stripped by inert gases. The method has the advantages of greatly improving the contact efficiency of the reactant, requiring lower temperature owing to liquid sulfur, having simple device, simple structure and low construction cost, reducing pollution and improving product yield thanks to the arrangement of the stripping section, which is beneficial to the realization of continuous and automatic production and the environmental protection treatment in the production process.

Description

technical field [0001] The invention relates to a production method of a compound containing carbon and sulfur, in particular to a process for preparing carbon disulfide in a circulating fluidized bed. Background technique [0002] Carbon disulfide is an important chemical raw material, which is widely used in production sectors such as man-made fibers, pesticides, rubber, and metallurgical beneficiation. At present, there are three main technological routes for dry production of carbon disulfide. One is the high-temperature intermittent production route using the ancient electric furnace method, using sulfur and charcoal (or coke) as raw materials, which has high power consumption, high labor intensity, and low production efficiency. Equipment corrosion and environmental pollution are very serious, basically eliminated in China, and some small devices are still in operation abroad; the second is the traditional reaction retort batch production route, using sulfur and coke (...

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Problems solved by technology

[0004] In order to solve the problems of high energy consumption, high labor intensity, low production efficiency, discontinuous production process, equipment corrosion and serious environmental pollution in the existing carbon disulfide production process and equipment, the present invention provides a process for preparing carbon disulfide in a circulating fluidized bed

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