High pressure air clearing method for treating fault of feedback appts. of circulation fluidized bed boiler

A technology for fluidized bed boilers and processing circulation, which is applied in the field of boiler control, and can solve problems such as poor fluidization of local materials, temperature fluctuations of circulating materials, shutdown accidents, etc., and achieve the effect of quickly dealing with blockage problems

Inactive Publication Date: 2005-01-12
WUXI HUAGUANG BOILER
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, due to the change of operating conditions and the change of coal type, the temperature of the circulating material will fluctuate. Once the temperature exceeds the melting point of the ash, or the refractory material that has peeled off and burst from the upper part of the feeder falls into the feeder, causing local material If the fluidization is not good, it will lead to partial coking of the circulating material in the feeder, which will hinder the circulation and cause the shutdown of the furnace.

Method used

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  • High pressure air clearing method for treating fault of feedback appts. of circulation fluidized bed boiler
  • High pressure air clearing method for treating fault of feedback appts. of circulation fluidized bed boiler

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Embodiment Construction

[0011] Such as figure 1 As shown: 1 is the inlet of the feeder, 2 is the riser of the feeder, 3 is the thermocouple installed on the riser 2 of the feeder, 4 is the pressure sensor installed on the riser 2 of the feeder, and 5 is Returner, 6 is the air distribution plate installed at the bottom of the returner 5, 7 is the manhole door for observation and maintenance, 8 is the wind cap installed on the air distribution plate 6, that is, the spout, and 9 is installed on the cloth The ash discharge pipe on the air plate 6, 10 is the main pipe connected to the high-pressure air pipe 12, and the other end is connected to the main pipe of the compressed air system equipped with the original boiler island, and 11 is the control valve for controlling the working state of the high-pressure air pipe 12 , 12 is the high-pressure air pipe, 13 is the ash discharge pipe valve controlling the working state of the ash discharge pipe 9, 14 is the loose air inlet, 15 is the return air inlet, 16...

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Abstract

The present invention relates to boiler controlling technology, and is especially the high pressure blast sweeping method for fast treating product returning device jamming accident in circular fluidized bed boiler. According to the design scheme the present invention provides, high pressure blast pipe is connected in the product returning device, and in case of abnormal temperature and pressure inside the product returning device, the control valve in high pressure blast pipe is opened and high pressure blast is utilized in blowing off the slag block deposited into the grid plate in the product returning device to restore the normal work state of the product returning devie. The high pressure blast pipe is connected to the grid plate and the high pressure blast sweeps upwards from the wind cowl on the grid plate. The present invention utilizes available high pressure medium in boilr for fast treating product returning device jamming via simple sweeping.

Description

technical field [0001] The invention relates to a boiler control technology, in particular to a high-pressure air purging method for quickly dealing with the clogging accident of a return feeder of a circulating fluidized bed boiler. Background technique [0002] The circulating fluidized bed boiler feeder is the key equipment to ensure the circulation of solid particles. Its function is to ensure that the circulating material is sent from the negative pressure area to the positive pressure area, and to ensure that the flue gas is not short-circuited and reversed. In a circulating fluidized bed boiler using a high-temperature separator, the temperature of the circulating material is as high as 800°C or more, so the control of the flow of the circulating material adopts a non-mechanical method, relying on the high-temperature circulating ash collected from the high-temperature separator, in the vertical pipe of the return feeder Form the material level, use it to overcome the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23C10/04
Inventor 苏小平沈解忠李俊吴文伟景磊
Owner WUXI HUAGUANG BOILER
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