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Coal pulverizing system of boiler

A technology of pulverizing system and boiler, which is applied in the preparation of block/powder fuel, supply/distribution of block/powder, combustion method, etc. The problems such as sufficient combustion of pulverized coal can achieve the effect of strong load regulation ability, preventing coking of side walls and fine pulverized coal.

Inactive Publication Date: 2017-07-11
CHINA ENERGY ENG GRP GUANGDONG ELECTRIC POWER DESIGN INST CO LTD
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Problems solved by technology

However, for the current positive pressure cold primary direct-blown pulverization system, due to the limitation of the direct-blown pulverization system, the primary air rate and primary air temperature are determined by the ventilation output of the coal mill and the coal pulverizer. Explosion-proof requirements are limited and cannot be further improved, which will affect the complete combustion of coal powder and make it difficult to reduce the carbon content of ash

Method used

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  • Coal pulverizing system of boiler
  • Coal pulverizing system of boiler
  • Coal pulverizing system of boiler

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Embodiment Construction

[0030] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific embodiments described here are only used to explain the present invention, and do not limit the protection scope of the present invention.

[0031] It should be noted that when an element is said to be "fixed" to another element, it may be directly fixed to the other element or may be fixed to the other element through an intermediate element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or connected to the other element through intervening elements. It can be understood that the terms "first", "second" and the like used herein are used to distinguish objects, and are not intended to limit their order and quantity...

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Abstract

The invention discloses a boiler pulverizing system, one way of the air outlet side of the primary fan is communicated with the air inlets of at least two coal mills after passing through the air preheater, and the other way is directly connected with the air inlets of at least two coal mills connected; the air outlet side of the air blower communicates with the burner of the boiler after passing through the air preheater and the secondary air box; its pulverized coal delivery system includes at least one first pulverized coal delivery system and at least one second pulverized coal delivery system, The first pulverized coal conveying system includes an intermediate powder silo, a powder feeder and a powder discharge fan. One end of the intermediate powder silo communicates with the discharge port of the corresponding coal mill, and the other end passes through the intermediate powder silo and the powder feeder in sequence and then connects with the The burner is connected, one end of the powder exhaust fan is connected with the air outlet of the air preheater, and the other end is connected with the air inlet of the powder feeder. The discharge port of the coal machine is connected, and the other end is connected with the burner.

Description

technical field [0001] The invention relates to the technical field of coal-fired power generation, in particular to a boiler pulverizing system. Background technique [0002] At present, the combustion of domestic W-type flame boilers is unstable, and the carbon content of ash residue is generally around 4% to 5%, and may even be as high as 6% to 7%. For W-flame boilers burning anthracite, it is necessary to find ways to improve the economic benefits of power plants by reducing the carbon content of ash. In order to achieve combustion stability in W-shaped flame boilers, in addition to optimizing the design of the boiler body, optimizing combustion adjustments, and controlling the fineness of coal powder, there is another very effective way, which is to increase the air temperature of the primary air-air-powder mixture to directly reduce Coal burns hot. However, for the current positive pressure cold primary direct-blown pulverization system, due to the limitation of the ...

Claims

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Application Information

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IPC IPC(8): F23K1/00F23K3/02
CPCF23K1/00F23K3/02
Inventor 刘建强涂国富李伟科邓成刚邓宏伟梁展鹏
Owner CHINA ENERGY ENG GRP GUANGDONG ELECTRIC POWER DESIGN INST CO LTD
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