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Thermal power plant surplus electricity and high-temperature furnace smoke double-heat-source lignite drying integrated system

A high-temperature furnace smoke, integrated system technology, applied in the direction of drying gas layout, lighting and heating equipment, drying, etc., can solve the problem that the boiler cannot burn high-moisture lignite, etc., and achieves the goal of adjusting the operating air temperature of the boiler and reducing the load on the grid. Effect

Pending Publication Date: 2021-01-08
黑龙江省华能电力技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the existing non-fan milling system boilers cannot burn high-moisture lignite, and further provide a comprehensive system for drying lignite with dual heat sources of surplus electricity and high-temperature furnace smoke in thermal power plants

Method used

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  • Thermal power plant surplus electricity and high-temperature furnace smoke double-heat-source lignite drying integrated system

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specific Embodiment approach 1

[0013]Specific implementation mode 1: Combinationfigure 1To explain this embodiment, the integrated system for drying lignite in thermal power plants with power reserve and high temperature furnace smoke dual heat sources includes a DCS control system 1, an electric heating air generator 2, an air temperature adjustment device 4, and coal drying and upgrading Device 5, dust removal and purification device 6, induced draft fan 7 and high-temperature furnace smoke pipe 8; the inlet of the electric hot air generator 2 is connected with the purified tail gas outlet end of the boiler, and the outlet end of the electric hot air generator 2 is connected to the air temperature adjustment device 4 The inlet end is connected, the outlet end of the air temperature adjusting device 4 is connected with the inlet end of the coal drying and upgrading device 5, the inlet end of the high-temperature furnace flue pipe 8 is connected with the furnace, the outlet end is connected with the inlet end of ...

specific Embodiment approach 2

[0014]Specific implementation manner two: combinationfigure 1To explain this embodiment, the integrated system for drying lignite with a dual heat source of excess electricity and high-temperature furnace smoke described in this embodiment also includes a heat exchange device 3; the outlet end of the electric hot air generator 2 and the heat exchange device 3 heat gas source The inlet end is connected, the heat source outlet end of the heat exchange device 3 is connected to the inlet end of the electric hot air generator 2, and the DCS control system 1 is connected with the electric hot air generator 2 and controls the electric hot air generator 2 to work. Energy conversion is performed through the medium of the heat exchange device 3 to increase energy utilization. Others are the same as the first embodiment.

specific Embodiment approach 3

[0015]Specific implementation mode three: combinationfigure 1Explaining this embodiment, the integrated system for drying lignite with a dual heat source of excess electricity and high temperature furnace smoke described in this embodiment also includes a dust removal and purification device 6, which is set in the coal drying and upgrading device 5 and the induced draft fan 7, the inlet end of the dust removal and purification device 6 is connected to the outlet end of the coal drying and upgrading device 5, the outlet end of the dust removal and purification device 6 is connected to the induced draft fan 7, and the DCS control system 1 is connected to the dust removal and purification device 6 and controls the dust removal and purification The device 6 works. Others are the same as the first embodiment.

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Abstract

The invention relates to a lignite drying integrated system, in particular to a thermal power plant surplus electricity and high-temperature furnace smoke double-heat-source lignite drying integratedsystem, and aims to solve the problem that an existing non-fan-mill pulverizing system boiler cannot burn high-moisture lignite. The system comprises a DCS (distributed control system), an electric hot air generator, an air temperature adjusting device, a coal drying and upgrading device, a dust removal and purification device, an induced draft fan and a high-temperature furnace smoke pipeline, wherein an inlet of the electric hot air generator is connected with a purified tail gas outlet end of the boiler, an outlet end of the electric hot air generator communicates with an inlet end of the air temperature adjusting device, an outlet end of the air temperature adjusting device communicates with an inlet end of the coal drying and upgrading device, an inlet end of the high-temperature furnace smoke pipeline communicates with a hearth, an outlet end communicates with the inlet end of the coal drying device, an outlet end of the coal drying and upgrading device communicates with the hearth through the induced draft fan, and the electric hot air generator, a heat exchange device, the air temperature adjusting device, the coal drying and upgrading device and the induced draft fan are all connected with the DCS. The system is applied to the field of thermal power plants.

Description

Technical field[0001]The invention relates to a comprehensive system for drying lignite, in particular to a comprehensive system for drying lignite with dual heat sources of excess electricity and high-temperature furnace smoke in thermal power plants.Background technique[0002]In recent years, my country’s industrial structure adjustment has been further deepened, and the power market structure has also undergone significant changes. The proportion of installed capacity of renewable clean energy such as wind power, solar power, and hydropower has gradually increased, and the proportion of primary energy power generation has gradually decreased. Feng's thermal power units have gradually expanded, and the state has continued to introduce various incentive policies for peak shaving. However, the use of lignite with too high moisture in the existing thermal power unit will cause non-combustion. The lignite with too high moisture cannot be burnt alone. Therefore, the problem of burning h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23K1/04F24H3/02F26B21/00F26B21/10F23J15/02
CPCF23J15/02F23K1/04F23K2201/20F24H3/022F26B21/001F26B21/10
Inventor 冯万春
Owner 黑龙江省华能电力技术有限公司