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Hood gad distributing board

A gas distribution plate and gas distribution technology, applied in chemical/physical processes, chemical instruments and methods, etc., can solve the problems of large air cap bubbles, defects in design methods, and abrasion of the side wall area of ​​the fluidized bed of the gas distribution plate.

Inactive Publication Date: 2005-02-23
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above hoods all adopt the form of jet holes directly spraying into the fluidized bed. Due to their unreasonable structure and design method defects, the following problems generally exist in the existing hoods during operation: (1) Solid particles flow back into the pre-distributed air chamber question
The jet hole in the traditional hood design has obvious jet velocity in the horizontal direction, and the solid particles entrained by the jet have a large horizontal momentum, which causes serious abrasion on the gas distribution plate, the adjacent gas hood and the side wall of the fluidized bed
(3) Loose hood problem
Due to the uneven distribution of gas in the gas distribution plate of the hood, the gas flux of some hoods is relatively large, and the air bubbles above the hood are large, which makes the hood withstand strong vibration, and then makes the hood loose, which brings great hidden dangers to the normal operation of the gas distribution plate of the hood

Method used

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  • Hood gad distributing board

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Embodiment Construction

[0009] The specific structure and best implementation mode of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0010] As shown in the figure, the present invention mainly includes gas inlet 1, variable resistance opening nut 2, hood air intake inner tube 3, hood fixing nut 4, multiple gas jet holes 6, hood gas discharge outer tube 7, and gas outlet smooth transition Section 8 and so on constitute. The air intake inner tube 3 of the hood is fixed on the gas distribution motherboard 5 through the fixing nut 4, and the variable resistance opening nut 2 is a variable inner diameter nut, which is installed at the inlet end of the air intake inner tube 3 of the hood. The outlet end of the air intake inner tube 3 of the hood is installed with the outer tube 7 of the hood, and the outlet 8 of the outer tube is designed as a smooth transitional outlet, which not only reduces the momentum loss of the outlet gas, but also makes the ...

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Abstract

A gas distributing plate of wind cowl is composed of the multiple fixed wind cowls, which has the internal gas inlet tube with symmetrical jet holes, external tube installed to said internal gas inlet tube and with smooth transition segment at its outlet, and the resistance-variable open nut installed at the gas inlet of internal tube.

Description

Technical field: [0001] The invention relates to a hood gas distribution plate, in particular to a hood gas distribution plate used in a circulating fluidized bed combustion device and a gasification device. Background technique: [0002] Air or oxygen-enriched air and water vapor are introduced into the fluidized bed reactor through multiple gas hoods. Since the section length and width of large fluidized bed coal combustion and gasification devices are usually greater than 1m, the gas flow rate of different hoods on the hood gas distribution plate is unevenly distributed. Experimental research has proved that the maximum gas volume hood on the distribution plate The ratio of the minimum air volume wind cap can reach 4.19. In other words, the different hoods on the gas distribution plate have serious uneven distribution of gas. Some hoods have a small amount of gas passing through, and the solid particles in the area around the hood are in a non-fluidized state (creating ...

Claims

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Application Information

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IPC IPC(8): B01J8/44
Inventor 郭庆杰梁治国张玉贞卢水根
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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