Special hot flue gas generator for lignite pulverized coal
A technology of hot flue gas and generator, applied in the direction of air heater, fluid heater, drying gas arrangement, etc., can solve the problem of low calorific value, and achieve the effect of low calorific value, high ash content and low stacking density
Active Publication Date: 2016-11-23
DANDONG HAIZHU COAL TECH DEV
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Problems solved by technology
The special hot flue gas generator for lignite pulverized coal uses pulverized coal with low calorific value, high ash content, fine particle size and small bulk density to generate hot flue gas to solve the storage problem of pulverized coal separated from lignite drying. The generating furnace outputs hot flue gas mixed with air and flue gas at 300°C-900°C after settling ash and mixing with air distribution
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[0020] The present invention will be further described below in conjunction with the accompanying drawings.
[0021] Such as Figure 1-5 As shown, the present invention comprises a body of furnace and a double-swirl pulverized coal burner 1, wherein the interior of the body of furnace is divided into a high-temperature combustion zone 15 and a low-temperature combustion zone 16, and the middle and upper part of one end of the body of heater in the high-temperature combustion zone 15 is symmetrically provided with two Two double swirl pulverized coal burners 1, one end of each double swirl pulverized coal burner 1 extends into the furnace, and the length of the double swirl pulverized coal burner 1 extending into the furnace is 100mm. The other end of each double-swirl pulverized coal burner 1 is placed outside the furnace body, and there are gaps between the two double-swirl pulverized coal burners 1 and the installation holes of the furnace body along the radial direction of ...
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The invention relates to a hot flue gas generator for pulverized coal, in particular to a special hot flue gas generator for pulverized lignite. The special hot flue gas generator comprises a generator body and double-swirl pulverized lignite nozzles. The inside of the generator body is divided into a high-temperature combustion zone and a low-temperature combustion zone, the double-swirl pulverized lignite nozzles are arranged at one end of the generator body and are positioned in the high-temperature combustion zone, pulverized lignite inlets and air inlet are formed in the double-swirl pulverized lignite nozzles, and ignition holes are formed in the side walls of the generator body and are positioned in the high-temperature combustion zone; a flue gas outlet is formed in one end of the low-temperature combustion zone, and a fire stopping wall is arranged inside the low-temperature combustion zone; air distribution outlets are formed in two sides of the generator body and are respectively positioned in the high-temperature combustion zone and the low-temperature combustion zone, and ash removal doors are arranged on the two sides of the generator body and are respectively positioned in the high-temperature combustion zone and the low-temperature combustion zone. The special hot flue gas generator has the advantages that the pulverized lignite with a low heat value, a high ash content, a small particle size and a low bulk density is combusted to generate hot flue gas, so that the pulverized lignite which is generated from lignite by means of upgrading, drying and separating can be stored, and the hot flue gas which is a mixture of air and flue gas at the temperature of 300-900 DEG C can be outputted in a mixed manner via ash precipitation and air distribution.
Description
technical field [0001] The invention relates to a pulverized coal hot flue gas generator, in particular to a special hot flue gas generator for lignite coal powder. Background technique [0002] There is currently no better treatment method for the pulverized coal produced by the gas-solid separation device of the drying system during the lignite upgrading and drying production process. Due to the high ash content, low calorific value, small particle size, low bulk density, insoluble in water, difficult molding, and low ignition point of this kind of pulverized coal, the packaging is easy to spontaneously ignite, and it is difficult to store when it is scattered, and it is easy to form secondary pollution to the environment. secondary pollution and waste of resources. It cannot be stored for a long time in the gas-solid separation device and the pulverized coal bin. Natural storage in these containers will spontaneously ignite, and the air must be isolated or discharged in ...
Claims
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IPC IPC(8): F24H3/00F24H9/18F26B21/14
Inventor 张振伟张诚
Owner DANDONG HAIZHU COAL TECH DEV