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Fixed type flying ash sampling device of coal-fired boiler and method

A sampling device and technology for coal-fired boilers, applied in the field of fly ash sampling, can solve the problems of easy occurrence of various failures, high price, and unsuitable for on-site application in power plants.

Active Publication Date: 2013-02-13
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its structure is complex and expensive, and it is prone to various failures under severe weather conditions, so it is not suitable for on-site application in power plants

Method used

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  • Fixed type flying ash sampling device of coal-fired boiler and method
  • Fixed type flying ash sampling device of coal-fired boiler and method
  • Fixed type flying ash sampling device of coal-fired boiler and method

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Embodiment Construction

[0059] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0060] figure 1 Among them, the coal-fired boiler fixed fly ash sampling device of this embodiment includes a sampling device, a cyclone separation and storage device, a flue gas flow measurement system, a heating device, a preheating and a blowback system;

[0061] The sampling device includes a sampling gun 1 and a rotating device. The gun head of the sampling gun 1 is placed in the inlet flue 2 of the air preheater, and the tail of the gun is connected to the cyclone separation device 3; The first sampling gun, the sampling gun 1 is provided with two sampling ports, and the suction speed of the two sampling ports is designed to be exactly the same. There is a suction static pressure measuring hole inside the sampling port, and a flue gas static pressure measuring hole on the outside of the gun head. By adjusting the static pressure balance, the two ...

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Abstract

The invention discloses a fixed type flying ash sampling device of a coal-fired boiler. The fixed type flying ash sampling device comprises a sampling device, a cyclone separation and storage device, a fume flow measuring system and a heating device. The invention also provides a fixed type flying ash sampling method of the coal-fired boiler. The method comprises steps of: preheating and sampling a return gas pipeline and blowing sampling system pipelines. By utilizing the device and the system, the operation is simplified, and at the same time the characteristic that the flying ash sampling is good in representativeness is maintained, and sampling at a constant speed under different boiler loads is realized; and furthermore, the possibility that the flying ash is accumulated in the sampling pipeline is greatly reduced, the sampling system is large in fume pressure difference, and meanwhile the sampling pipeline is small in resistance, and thus the sampling system is good in adjustment performance.

Description

technical field [0001] The invention relates to the field of fly ash sampling, in particular to a fixed fly ash sampling device and method for a coal-fired boiler. Background technique [0002] Fly ash is a fine particle formed after pulverized coal is burned in the boiler furnace, which enters the tail flue along with the flue gas. Most of the fly ash is separated by the dust collector, and only a small part is discharged into the atmosphere. The percentage of the mass of unburned carbon in the fly ash to the mass of the fly ash is called the carbon content of the fly ash. The carbon content of fly ash is the main indicator to reflect the combustion effect of the boiler, and it also has a great influence on the comprehensive utilization of fly ash. Therefore, it is necessary to control the carbon content of fly ash within a certain range. In the daily operation of the boiler, it is necessary to collect fly ash samples regularly to measure the carbon content of the fly ash...

Claims

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Application Information

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IPC IPC(8): G01N1/14
Inventor 侯凡军
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY
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