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Anti-coking burner for pulverized coal boiler and boiler installed with the burner

A pulverized coal boiler and burner technology, which is applied in the direction of burning powder fuel burners, burners, and burning with multiple fuels, and can solve the problems of rising exhaust gas temperature, boiler failure to reach normal output, and impact

Inactive Publication Date: 2011-12-21
蒋振华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the boiler is coked, it affects the heat absorption effect of the heating surface. The direct negative impact is that the exhaust gas temperature increases, the amount of desuperheating water increases, and the boiler cannot reach the normal output.

Method used

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  • Anti-coking burner for pulverized coal boiler and boiler installed with the burner
  • Anti-coking burner for pulverized coal boiler and boiler installed with the burner
  • Anti-coking burner for pulverized coal boiler and boiler installed with the burner

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Embodiment Construction

[0013] Such as figure 1 As shown, the pulverized coal boiler anti-coking burner of the present invention mainly includes a burner casing and a pulverized coal flow channel in the casing, and a pulverized coal separator 1 and a buffer zone 2 are arranged in sequence along the pulverized coal flow direction in the pulverized coal flow channel , the light powder passage 3 and the thick powder passage 4 parallel to each other and separated, and the light powder nozzle 5 and the thick powder nozzle 6 corresponding to the thick and light powder passages; a perimeter air duct is provided on the outer edge of the thick and light powder passages 7. A regulator is also provided on the wall of the flow channel in the pulverized coal separator, and the regulator includes a separation block 8 that can move radially along the flow channel, and an adjustment hand wheel 9 connected with the separation block and located outside the burner casing. Between the light powder passage 3 and the thi...

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Abstract

The invention discloses an anti-coking burner for a pulverized coal boiler and a pulverized coal boiler installed with the burner. Separated light powder channel and thick powder channel, as well as light powder nozzle and thick powder nozzle; peripheral air ducts are arranged on the outer edges of the thick and light powder channels and the nozzle. A regulator is provided on the flow channel wall in the pulverized coal separator. When the burner is running at a high evaporation rate, the separation block of the burner regulator is properly withdrawn, and at the same time, the peripheral air is opened to reduce the concentration of the separated coal powder. The temperature here is 900°C-950°C, thereby preventing the melting of ash Potential for coking nearby. When the load is low or the calorific value of the coal is low, the density ratio can be adjusted to the maximum value through the adjustment of the density adjustment handwheel, and the peripheral wind can be properly turned off to make it burn stably.

Description

[0001] technical field [0002] The invention relates to a burner in a pulverized coal boiler, in particular to an anti-coking burner and a boiler equipped with the burner. Background technique [0003] The burner is a device that sends fuel and air into the furnace according to the required concentration, speed, turbulence and mixing method, and enables the fuel to ignite and burn stably in the furnace. The existing pulverized coal boiler burners mainly include louver type burner and large speed difference type burner, but in use, it is found that when these two types of burner are used to burn pulverized coal with low ash melting point, the heating surface of the boiler is easy to burn. Knot coking. Among them, the louver type burner has a large resistance because the pulverized coal is separated from the thick and thin after three impacts, and a blunt body is designed at the outlet of the thick powder. stiffness. This causes excessive heat at the nozzle and coking. ...

Claims

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Application Information

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IPC IPC(8): F23D1/00F23C5/08
Inventor 蒋振华
Owner 蒋振华
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