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Internally circulating fluidized reburning device for fly ash based on high temperature separation

A technology of fly ash and fluidization, which is applied in the direction of fluidized bed combustion equipment, fuel for combustion in molten state, combustion method, etc., can solve the problems of weak function of capturing fly ash, improve combustion efficiency and boiler thermal efficiency, and reduce combustion heat Loss, the effect of increasing output

Inactive Publication Date: 2008-11-19
XI AN JIAOTONG UNIV
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Problems solved by technology

However, due to the high speed of the flue gas rushing out of the throat of the furnace arch, the falling fly ash will be entrained by the rotating air flow after impacting the furnace arch. Practice has proved that the main function of the furnace arch is to strengthen ignition, combustion and burnout. , the function of capturing fly ash is weak

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  • Internally circulating fluidized reburning device for fly ash based on high temperature separation
  • Internally circulating fluidized reburning device for fly ash based on high temperature separation
  • Internally circulating fluidized reburning device for fly ash based on high temperature separation

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Embodiment Construction

[0027] A fly ash internal circulation fluidized reburning burnout device based on high temperature separation of the present invention, for different boiler types, it at least includes a furnace, a front wall water cooling wall and a rear wall water cooling wall, a front wall water cooling wall and a rear wall The water-cooled wall extends into the front and rear arches inside the furnace and the combined structure of the secondary air arranged in the rear arch, as well as the heating surface of the water-condensed slag tube bundle. A combined water-cooled separator is arranged on the heating surface of the water-condensed slag tube bundle at the furnace outlet. The fly ash separated by the combined water-cooled separator is naturally returned to the high temperature zone of the furnace for reburning by gravity.

[0028] see figure 2 , image 3 , figure 2 It is an embodiment of the present invention, which includes a fire grate 1, a front arch 2, a combined secondary air s...

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Abstract

The invention relates to an ash internal cycle fluid afterburning device, based on high-temperature separation, wherein the invention uses furnace and secondary wind to realize initial high-temperature separation and sets high-temperature combined water cooling separator at the heated surface of water condense slag tube beam at the outlet of high-temperature smoke to realize ash high-temperature separation; and the separated ash is feedback to the high-temperature area to be cycle fluidized burnt, to meet the burning conditions as temperature, time, and disturbing mixing, to improve the burning rate and reduce the pollution. The invention can improve the burnt rate and the burning efficiency of coal.

Description

technical field [0001] The invention belongs to the technical field of thermal energy engineering application, and relates to a fly ash internal circulation fluidized reburning device based on high temperature separation. Background technique [0002] my country is a country where coal is the main energy source, and more than 83% of coal is used in the form of combustion. The annual coal consumption of coal-fired industrial boilers widely used in industrial production and social life is about 500 million tons. By the end of 2005, there were about 553,800 industrial boilers in use nationwide, with a total capacity of about 1.726 million MW and an average capacity of about 3.11 MW; about 85% of them were coal-fired boilers, and more than 65% of the coal-fired boilers were mechanized bed-fired boilers. Boilers, especially industrial and central heating boilers above 1t / h. [0003] At present, the overall technology of mechanized layer-fired coal-fired boilers is backward, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23C10/18
Inventor 赵钦新刘志起刘春明姜世庆陈风歧
Owner XI AN JIAOTONG UNIV
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