Steam-electric coal drying system

Abstract

Disclosed is a steam-electric coal drying system which is used for drying wet coal with the water extent larger than 35%. The steam-electric coal drying system comprises a boiler, a turbomachine, a power generator, a drying tower, a cooling device and a cooling tower, the boiler is used for providing steam and high-temperature waste gas with the oxygen content smaller than 6%, the turbomachine is communicated to the boiler to be pushed by the steam to run, the power generator is linked to the turbomachine to be driven by the turbomachine to generate power, the cooling device is communicated to the turbomachine to enable the steam extracted by a medium-pressure section of the turbomachine to generate cooled gas through heat exchange, the drying tower is communicated to the boiler to utilize the high-temperature waste gas to dry brown coal conveyed into the drying tower to change the brown coal into high-temperature dry coal with the total water content smaller than 25%, and the cooling tower is communicated to the cooling device to utilize the cooled gas to cool the high-temperature dry coal conveyed into the cooling tower to change the high-temperature dry coal into normal-temperature cooled dry coal. By the steam-electric coal drying system, explosion in the process of drying and natural smoldering in the process of conveying are avoided, and safety is greatly improved.

Description

technical field [0001] The present invention relates to a steam-electricity drying coal system, in particular to a steam-electricity drying coal system applied to generate electricity by steam. Background technique [0002] The remains of microorganisms or animals and plants left over from ancient times have been gradually buried underground after millions of years of crustal changes, and have gradually formed complex structures through the decomposition of bacteria and long-term high-pressure and high-temperature environments. Hydrocarbons, that is, fossil fuels that provide high energy. Among them, petrochemical fuels include coal, oil, natural gas, oil shale, and tar sands. [0003] Since the industrial revolution, the use of fossil fuels has increased significantly with the development of industry, and as a result, the global petrochemical resources have been depleted day by day. Scientists from all over the world are striving to develop alternative energy sources that ...

AI Technical Summary

Problems solved by technology

However, the drying technology that uses high-temperature flue gas in direct contact with wet coal still has the risk of explosion, and the dried high-temperature coal may also spontaneously smolder due to residual heat during transportation.

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