Double-inlet and double-outlet coal mill inlet cold and hot primary air mixing system and method

Abstract

The invention discloses a double-inlet and double-outlet coal mill inlet cold and hot primary air mixing system and method, and belongs to the field of energy-saving treatment of power station boilercoal pulverizing systems. The system comprises a coal mill and further comprises a hot primary air main pipe, a cold primary air main pipe, a hot primary air pipe, a hot primary air adjusting baffle,a cold primary air adjusting baffle, a cold primary air pipe, a mixed air pipe, a flow dividing tee joint, a left-side mixed air branch pipe, a right-side mixed air branch pipe, a right-side capacityair door and a left-side capacity air door. By changing the mounting modes of the hot primary air adjusting baffle and the cold primary air adjusting baffle, structurally optimizing the pipeline structure of an airflow mixing part and structurally optimizing the flow dividing tee joint, the problem that the temperature deviation of mixed air at inlets in the two ends of the double-inlet and double-outlet coal mill is large can be thoroughly solved.

Description

technical field [0001] The invention relates to a system and method for mixing cold and hot primary air at the entrance of a double-inlet and double-outlet coal mill, and belongs to the field of energy-saving management of power plant boiler pulverizing systems. Background technique [0002] Coal-fired power station pulverizing system is an important auxiliary system of the boiler, and its safe and economical operation directly determines the economy and safety of unit operation. [0003] The double-inlet and double-outlet pulverized coal pulverization system is one of the most common layout types selected by power plant boilers, but there is often a problem of large temperature deviation of the mixed air at the inlets of both ends of the coal mill, resulting in inconsistent temperature at the outlet of the coal mill. Restrict the outlet temperature of the coal mill from further increasing. Taking the boiler of a 330MW unit as an example, when the unit is running at full lo...

AI Technical Summary

Problems solved by technology

[0005] In order to completely solve the problem of large temperature deviation of the mixed air at the inlets of the double-inlet and double-outlet coal mills, the present invention provides a system and method for mixing cold and hot primary air at the inlets of the double-inlet and double-outlet coal mills

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