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Device using magnesium slag as desulfurizing agents in fluidized bed boiler

A fluidized bed and boiler furnace technology, applied in the field of fluidized bed boilers, can solve the problem of low temperature of magnesium slag, and achieve the effects of realizing reuse, saving desulfurization costs, and reducing the amount of limestone.

Pending Publication Date: 2020-02-28
HUANENG CLEAN ENERGY RES INST +1
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  • Claims
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Problems solved by technology

[0003] Therefore, the purpose of the present invention is to solve the technical problem of adding a complex magnesium slag feeding system and adding the magnesium slag to the boiler at too low temperature in the prior art, and to provide a device using magnesium slag as a desulfurizer in the fluidized bed boiler furnace

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  • Device using magnesium slag as desulfurizing agents in fluidized bed boiler

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Embodiment Construction

[0019] The present invention will be further described in detail through the accompanying drawings and specific embodiments below.

[0020] Such as figure 1 As shown, the present invention provides a device utilizing magnesium slag as a desulfurizing agent in a fluidized bed boiler 1 furnace. A flue 12, a dust removal device 13 and a chimney 14 are sequentially arranged at the tail of the boiler 1. Circulating air pipe 3 , the circulating air pipe 3 is connected to the slag spraying port 8 of the boiler 1 , and the slag spraying port 8 is arranged 3-4m above the air distribution plate 9 of the boiler 1 . A flue gas recirculation fan 4 and a Venturi mixer 5 are sequentially arranged on the circulating air duct 3 .

[0021] Magnesium-containing waste slag is arranged in the magnesium-containing waste slag 2, the mass fraction of magnesium oxide in the magnesium-containing waste slag is ≥ 55%, and the particle size of carbide slag and magnesium-containing waste slag is 100-150 m...

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Abstract

The invention discloses a device using magnesium slag as desulfurizing agents in a fluidized bed boiler. The device comprises a boiler, a magnesium slag bin, a flue, a smoke recirculation fan and a venturi mixer; the flue is arranged at the tail of the boiler; a circulating wind pipe is leaded out from the flue, and communicates to a slag spraying port of the boiler; the smoke recirculation fan isarranged on the circulating wind pipe; the venturi mixer is arranged on the circulating wind pipe in the downstream position of the smoke recirculation fan; and the magnesium slag bin communicates toa powder inlet at a throat part of the venturi mixer through a pipeline. Through the technical scheme, the reutilization of circulating smoke in the fluidized bed boiler device can be realized, and the problem of instable bed temperature caused by lower temperature of the desulfurizing agents is prevented.

Description

technical field [0001] The invention relates to a device using magnesium slag as a desulfurizing agent in a fluidized bed boiler furnace, belonging to the technical field of fluidized bed boilers. Background technique [0002] China is a large coal country, and the use of coal resources is very common. However, with the increasing pressure of environmental protection, the clean and efficient use of coal resources is particularly important. Circulating fluidized bed boiler has the advantages of wide fuel adaptability, good load regulation, high combustion efficiency, efficient and comprehensive utilization of resources, and low pollutant emission intensity. As a clean coal combustion equipment, it has been widely used at home and abroad. application. Coal contains sulfur, so when it is burned it releases SO 2 , due to SO 2 Exhaust to the atmosphere will cause great harm, so its emission concentration must be controlled during the combustion process. The fluidized bed boil...

Claims

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Application Information

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IPC IPC(8): F23C10/18F23J15/02F23L15/04C10L9/10
CPCC10L9/10F23C10/18F23J15/02F23L15/04Y02E20/34
Inventor 茹宇王海涛时正海高洪培
Owner HUANENG CLEAN ENERGY RES INST
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