Low-pollution efficient combustion method for coal-burning boiler and combustion apparatus

A combustion method and coal-fired boiler technology, applied in the direction of combustion methods, solid fuel combustion, fuel burned in a molten state, etc., can solve problems such as high smoke and dust

Inactive Publication Date: 2007-08-29
INST OF PROCESS ENG CHINESE ACAD OF SCI
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Problems solved by technology

[0006] The object of the present invention is to provide a smokeless, NO suppression x Generate and implement effective desulfurization in the furnace, and can be applied to various energy capacities, especially the low-pollution coal-fired method of large-capacity industrial boilers, to solve the high smoke and high SO of traditional chain and reciprocating grate layer-fired boilers x , high NO x emission problems and improve the thermal efficiency of the boiler by achieving complete combustion of fuel

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  • Low-pollution efficient combustion method for coal-burning boiler and combustion apparatus
  • Low-pollution efficient combustion method for coal-burning boiler and combustion apparatus
  • Low-pollution efficient combustion method for coal-burning boiler and combustion apparatus

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Embodiment Construction

[0058] Accompanying drawing 2 is a schematic diagram of the structure of a combustion device with a chain grate combustion furnace that implements the combustion method of the present invention shown in Figure 1 and is applied to large-capacity industrial boilers. The combustion device is mainly composed of a fluidized bed gasification furnace 1, a chain grate semi-coke combustion furnace 2, a boiler heat exchanger 4 connected to the upper space of the combustion chamber 14 of the chain combustion furnace 2, and a particle flow on the left side wall. The fluidized bed rear wall 51 and the fluidized bed windbox rear wall 52 form the conveying channel 3 formed by the boiler heat exchanger front wall 6 (extended downwards) on the right side. Coal fuel and desulfurizer are supplied into the fluidized bed gasifier 1 from the other side of the conveying channel 3 . In order to facilitate the supply of fuel and desulfurizer, the supply port A is located above the upper surface of the...

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Abstract

The invention relates to burning method and the device of low pollution and high efficiency for the coal-burning boiler which divides the burn into two processes. The two processes are the fluidized-bed oxidizing gasification and the burning of the carbocoal and fuel gas in grate burning furnace. The carbocoal and the fuel gas are transferred into the grate burning furnace through the moveable bed channel together; the fuel gas burn at the high temperature carbocoal layer and the carbocoal surface, so it can eliminate the black smoke and NOx; so the carbocoal and the fuel gas can be burned absolutely; the desulfurater added with the coal can remove the sulfide in the fluidized-bed part oxidizing gasification furnace which are dispersed between the carbocoal particle surface and the micropore to remove the oxysulfide sulfoxide of the burning furnace.

Description

technical field [0001] The invention belongs to the technical field of clean energy, and relates to a high-efficiency combustion method for smokeless coal-fired boilers, suppression of nitrogen oxides, and effective desulfurization in the furnace, and a combustion device based on the combustion method. The combustion method and combustion device are particularly suitable for various large-capacity coal-fired industrial boilers. Background technique [0002] Coal accounts for more than 70% of my country's primary energy, and nearly 1 / 3 of it, that is, about 4.5 tons of standard coal, is consumed in the direct combustion of about 530,000 industrial boilers of various types. The main combustion technology used by my country's industrial boilers today is still chain and reciprocating grate layer combustion (accounting for more than 95% of all boilers), not only the thermal efficiency is low (55-65%), but the smoke and SO 2 It also accounted for my country's soot and SO 2 more ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23C10/02F23B10/00F23B30/08F23B30/00F23B10/02
Inventor 许光文高士秋刘新华
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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