Method and device for making fluid bed to produce super high-temperature fume

A fluidized-bed gasifier and fluidized-bed technology are applied in the directions of fluidized-bed combustion equipment, combustion methods, and fuels burned in a molten state, which can solve problems such as limiting the scope of application, and achieve expansion of the scope of application, pressure-fire start-up, etc. Fast, easy-to-run effects

Inactive Publication Date: 2008-02-13
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

However, in practice, it is found that due to the ash melting point of coal, the high-temperature flue gas produced ...

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  • Method and device for making fluid bed to produce super high-temperature fume

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Embodiment Construction

[0019] The working process and specific implementation of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0020] The processing procedure of the inventive method is:

[0021] (1) Send the coal crushed by the crusher into the fluidized bed gasification furnace, pass it into the gasification medium, and perform partial gasification to generate high-temperature gas; the gasification medium can only use preheated air and discharge it from the burnout chamber The high-temperature exhaust gas is used to preheat the cold air; the preheated air and water vapor can also be used at the same time; the air can also be directly used without preheating.

[0022] (2) The gasified semi-coke discharged from the gasifier is transported to the fluidized bed flue gas generator, and the flue gas generator passes air with an excess coefficient greater than 1.5 to burn the semi-coke and generate a large amount of high-temperature flue gas.

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Abstract

The invention discloses a method and a device to produce the super high-temperature flue gas with a fluidized bed, and belongs to the fluidized bed gasification combustion technical field. With the invention, inferior coal is gasified by a fluidized bed gasification furnace to produce coal gas, and the semi-coking coal gas is conveyed to a fluidized bed flue gas generation furnace arranged side by side with the gasification furnace. The large excess-coefficient air is fed into the flue gas generating furnace to make the coke completely burned and produce the flue gas. The coal gas and the flue gas are fed into a complete combustion chamber for mixed combustion to produce the super high-temperature flue gas between 1200 DEG C and 1500 DEG C. The device comprises a crusher, a coal feeding device, the fluidized bed gasification furnace, a gasified semi-coke conveying device, the fluidized bed flue gas generation furnace, a gasification medium conveying device, a blower, a coal gas combustor, and an air induction device. The device is characterized in that the device is provided with a good applicability for fuel, a high fuel utility rate, little discharged pollutants, and so on, so the invention is favorable for promoting the quality of solid material drying, roasting and calcining, and increased the output of dried, roasted and calcined solid material. As the novel energy-saving equipment, the device is simple in the manufacture, convenient for operation, flexible for adjustment and stable in combustion, and is provided with an obvious energy-saving effect.

Description

technical field [0001] The invention belongs to the technical field of fluidized bed gasification combustion, and in particular relates to a method and a device for generating ultra-high temperature flue gas in a fluidized bed. Background technique [0002] At present, in the industrial production of building materials, chemical industry and metallurgy, a large amount of high-temperature flue gas needs to be used as drying, roasting and calcination medium. Commonly used methods for generating high-temperature flue gas include blast furnace gas combustion, pulverized coal injection combustion, coal gasification combustion, and fluidized bed high-temperature flue gas generator. The methods and devices adopted are different from each other, each of which has certain problems and deficiencies. Most of the existing domestic technologies related to fluidized bed generation of high-temperature flue gas use a single hearth of fluidized bed for direct coal combustion or coal gasific...

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Application Information

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IPC IPC(8): F23C10/00C10J3/56
CPCY02E20/18
Inventor 张世红陈汉平陈小琛鞠付栋
Owner HUAZHONG UNIV OF SCI & TECH
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