System for increasing pulverizing and drying output force during doped lignitous coal burning of burning bituminous coal boiler

Abstract

The invention provides a system for increasing a pulverizing and drying output force during doped lignitous coal burning of a burning bituminous coal boiler, and relates to a doped lignitous coal burning system of the burning bituminous coal boiler in order to solve the problem that thermal power generation enterprises adopting the conventional doped lignitous coal burning mode has potential safety hazard and poor running economy. A primary air fan is communicated with the first section of a hot primary air pipeline through a cold primary air pipeline and a rotary air preheater; the first section of the hot primary air pipeline is communicated with a second section of the hot primary air pipeline through a connecting piece with a square top and a round bottom; the second section of the hot primary air pipeline is connected with a hot primary air female pipe through the third section of the hot primary air pipeline; the hot primary air female pipe is communicated with the hot primary air branch pipeline; the outlet of a micro-oil ignition small oil gun is communicated with the second section of the hot primary air pipeline; and at least one thermocouple is arranged on the second section of the hot primary air pipeline and the third section of the hot primary air pipeline. The system is used in the doped lignitous coal burning system of the burning bituminous coal boiler.

Description

technical field [0001] The invention relates to a combustion system for burning lignite in a bituminous coal-fired boiler. Background technique [0002] In recent years, with the changes in the coal market, more and more enterprises are unable to obtain enough designed coal types, especially in areas such as eastern Mongolia and the three northeastern provinces in my country where lignite reserves are relatively abundant, and a large amount of lignite must be supplemented. At present, coal-fired power plants use existing bituminous coal-fired boilers (using direct-blowing pulverizing system) to burn lignite in the operation mode, which has great potential safety hazards (the air in the primary air duct has high oxygen content) and poor operating economy. The main manifestations are: the outlet temperature of the coal mill seriously deviates from the design value, which makes the temperature of the air-powder mixture low, which affects the ignition of the pulverized coal airf...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a system for improving pulverization and drying output during the combustion process of a bituminous coal-fired boiler mixed with lignite, so as to solve the huge potential safety hazards in thermal power generation enterprises using the existing operating mode of bituminous coal-fired boilers mixed with lignite and the problem of poor operating economy

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