Combined driving device and combined driving method for medium-speed coal mill and circulating fan

Abstract

The invention provides a combined driving device of a medium-speed coal mill and a circulating fan and a combined driving method. The combined driving device of the medium-speed coal mill and the circulating fan comprises the medium-speed coal mill, a first coupler, a steam turbine, a second coupler and the circulating fan which are arranged in sequence, wherein the two ends of the steam turbine are correspondingly connected with the medium-speed coal mill and the circulating fan through the first coupler and the second coupler respectively, and the steam turbine, the medium-speed coal mill and the circulating fan are arranged to be coaxial, so that the steam turbine drives the medium-speed coal mill and the circulating fan at the same time; according to the embodiment of the invention, the turbine is adopted for driving, the turbine is arranged between the medium-speed coal mill and the circulating fan, and the coaxial design is adopted, so that one-to-two driving is realized, and the heat efficiency of the unit is improved; in addition, the embodiment of the invention is simple and convenient to operate and high in automation degree, so that the energy consumption can be reduced, and great energy-saving benefits can be obtained.

Description

technical field [0001] The invention belongs to the technical field of coal gasification, and in particular relates to a combined driving device and a combined driving method of a medium-speed coal mill and a circulating fan. Background technique [0002] Pulverized coal pressurized gasification technology is an advanced technology that cleanly and efficiently converts solid fuels such as various types of coal and petroleum coke into a mixture of hydrogen and carbon monoxide mainly composed of hydrogen and carbon monoxide under high-temperature and high-pressure environments. Dry coal powder with a suitable particle size is continuously fed into the gasifier with high-temperature inert gas, supplemented with oxygen and water vapor at the same time, and participates in the reaction together under high temperature and high pressure conditions to generate crude gas, hydrogen and carbon monoxide. The lumpy raw coal with a particle size of less than 30mm from the plant is sent to...

AI Technical Summary

Problems solved by technology

Since high-power machinery such as coal mills and circulating fans are driven by electricity, the energy consumption is large and the operating cost is high; In the framework of the modernization, the motor must be an explosion-proof motor, and the cost needs to be increased

It can be seen that since the pulverizer and the circulating fan of the pulverized coal pressurized gasification device are respectively driven by motors, the operation energy consumption is high and the explosion-proof cost is high

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