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Online automatic classification device and classification method for fuel coal in composite combustion

An automatic grading and grading method technology, applied in the direction of combustion methods, combustion equipment, fuel supply, etc., can solve the problems of low thermal efficiency, insufficient use of fuel coal, high emissions of smoke and nitrogen oxides, and achieve full and efficient combustion, reduce Work load, emission reduction effect

Inactive Publication Date: 2015-04-15
SHANXI LANTIAN ENVIRONMENTAL PROTECTION EQUIPCO
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Problems solved by technology

[0006] The present invention provides an online automatic grading device for fuel coal in composite combustion in order to solve the problems of insufficient fuel coal utilization, low thermal efficiency, and high emissions of smoke and nitrogen oxides in the prior art

Method used

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  • Online automatic classification device and classification method for fuel coal in composite combustion

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Embodiment 2

[0038] A fuel coal online automatic grading device in composite combustion, the structure is the same as that of embodiment 1; when burning, the coal lumps with particle diameters of 3-6mm, 6-25mm, and 25-40mm are respectively divided into 15 according to the feeding amount: The ratio of 85:10 is sent to the coal feeder, and the others are the same as in Embodiment 1.

Embodiment 3

[0040] A fuel coal online automatic grading device in composite combustion, the structure is the same as that of embodiment 1; when burning, the coal lumps with particle diameters of 3-6mm, 6-25mm, and 25-40mm are respectively divided into 20 according to the feeding amount: The ratio of 65:15 is sent to the coal feeder, and the others are the same as in Embodiment 1.

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Abstract

The invention discloses an online automatic classification device and a classification method for fuel coal in composite combustion, and belongs to the technical field of coal-fired industrial boiler fuel conveying. The online automatic classification device solves the problems of insufficient use of the fuel coal, low heat efficiency and high dust and nitrogen oxide emission in the prior art. The online automatic classification device for the fuel coal in the composite combustion comprises a crusher, a multistage separating screen, classification warehouses, a coal feeder and a coal grinding powder sprayer, the crusher is connected with the multistage separating screen, three screen meshes are fixed on the multistage separating screen, the bottom of the multistage separating screen is connected with the coal grinding powder sprayer through a pipeline, one end of each screen mesh is connected with an inlet of the corresponding classification warehouse through an inclined chute, and layers of the classification warehouses are respectively connected with the coal feeder through pipelines with discharge valves. Wire screening of the fuel coal is realized, coal combustion rate is increased, dust and nitrogen oxide emission is reduced, and the service life of a coal grinder is prolonged.

Description

technical field [0001] The invention belongs to the technical field of coal-fired industrial boiler fuel delivery, and in particular relates to an online automatic grading device and a grading method for fuel coal in composite combustion. Background technique [0002] The quality, fineness and particle size distribution of fuel coal are important conditions to ensure the ignition and complete combustion of fuel. Coal is burned in an industrial boiler with a fixed structure and a fixed burning time. The larger the particle size, the longer the burning time, and the more incomplete combustion losses; on the contrary, the smaller the particle size, the larger the specific surface area, which is more conducive to combustion and improves the combustion efficiency. Rate. However, fine pulverized coal below 3 mm is easily blown up by the blower in the preheating section, resulting in increased smoke emissions; and coal with large particle size will affect the performance of the pu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23K1/00F23K3/00
Inventor 王欢王民发杜铭华郎鹏德郎凤娥郎秀荣
Owner SHANXI LANTIAN ENVIRONMENTAL PROTECTION EQUIPCO
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