Cold and hot primary air forced mixing system and method for inlets of double-inlet and double-outlet coal mill

A double-inlet, double-outlet, forced mixing technology, applied in the system field, can solve problems such as the temperature deviation of the mixed air at the inlet of both ends of the coal mill, the increase of the outlet temperature of the coal mill, and the inconsistency of the outlet temperature of the coal mill, etc.

Inactive Publication Date: 2021-05-28
HUADIAN ELECTRIC POWER SCI INST CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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. Restricting the further increase of the outlet temperature of the coal mill

Method used

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  • Cold and hot primary air forced mixing system and method for inlets of double-inlet and double-outlet coal mill
  • Cold and hot primary air forced mixing system and method for inlets of double-inlet and double-outlet coal mill
  • Cold and hot primary air forced mixing system and method for inlets of double-inlet and double-outlet coal mill

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Embodiment

[0020] see Figure 1 to Figure 5 In this embodiment, the double-inlet and double-outlet coal mill inlet cold and hot primary air forced mixing system includes a hot primary air main pipe 1, a cold primary air main pipe 2, a hot primary air pipe 3, a hot primary air regulating baffle 4, and a cold primary air main pipe 1. Primary air adjustment baffle 5, cold primary air duct 6, mixing air duct 7, split tee 8, left mixing air branch pipe 9, right mixing air branch pipe 10, coal mill 13, cold primary air corner deflector 16 , primary cold air diversion device 17 and primary cold air spout 18; one end of primary primary air pipe 3 and primary primary air pipe 6 is connected to the side wall of primary primary air primary pipe 1 and secondary primary primary air primary pipe 2 respectively, The adjusting baffle 4 and the cold primary air adjusting baffle 5 are arranged on the hot primary air pipe 3 and the cold primary air pipe 6 respectively, and the shafts of the hot primary air...

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Abstract

The invention relates to a cold and hot primary air forced mixing system and method for inlets of a double-inlet and double-outlet coal mill, and belongs to the field of energy-saving treatment of power station boiler pulverizing systems. According to the requirement of the installation mode of a hot primary air adjusting baffle and a cold primary air adjusting baffle, the transverse flow field of air flow can be kept uniform; by using a multi-layer cold primary air distribution device at the cold primary air tail end, cold primary air and hot primary air are intensively mixed; and through the design of flow guide plates and cold primary air corner flow guide plates in the system and the use of a flow distribution tee joint middle partition plate, the local flowing resistance of the air flow is reduced, and the stability of the flow field can be kept. The system is simple and reasonable in design, safe and reliable, the cold primary air and the hot primary air are intensively mixed, the stability of the flow field is kept, and the problem that the air temperature deviation of the 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, in particular to a double-inlet and double-outlet coal pulverizer inlet cold and hot primary air forced mixing system and method thereof, belonging 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. 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. [0003] Taking the boiler of a 330MW unit as an exampl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B02C23/26
CPCB02C23/26
Inventor 黄建平陈广伟孙海峰高佳佳胡志勇陈炜聪刘法志
Owner HUADIAN ELECTRIC POWER SCI INST CO LTD
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