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Coal-fired boiler combustion operation method and combustion operation system

The technology of a coal-fired boiler and its operating method, which is applied in the field of electric power, can solve the problems of high fuel system cost and many safety hazards, and achieve the effects of reducing emission concentration, cost, and carbon content of fly ash

Pending Publication Date: 2017-09-01
GUODIAN NANJING ELECTRIC POWER TEST RES CO LTD
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Problems solved by technology

In short, the cost of the fuel system is high and there are many safety hazards; later, the plasma ignition was successfully tested in the power plant. The plasma ignition system solved the safety hazards of the fuel system and did not need to be equipped with a corresponding fire protection system, but the plasma cathode head was only used for dozens of hours. Long-term low load will become the norm with the sluggish power market and the flexible requirements of power generation groups for unit operation. It is obviously not advisable to use plasma oil guns for long-term stable combustion.

Method used

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  • Coal-fired boiler combustion operation method and combustion operation system
  • Coal-fired boiler combustion operation method and combustion operation system
  • Coal-fired boiler combustion operation method and combustion operation system

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Embodiment Construction

[0027] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0028] Such as figure 1 As shown, the combustion operation system of the coal-fired boiler of the present invention reforms the existing coal-fired boiler, including a biomass gasification gas generation device outside the furnace, and the bundled biomass is transported to the feeder 9 through the conveyor belt 8 , and then enter the gasifier 7, while the gasification medium enters the gasifier 7 from the gasification furnace wind chamber 10, and the biomass gasification gas produced by the gasification of biomass in the gasifier 7 enters the cyclone separator 11, and is separated Most of the biomass ash, unburned biomass ash and separated bed material particles are re-transported to the gasifier 7 through the auger 13 provided at the lower part, and the biomass gasification gas passes through the gas-gas heat exchanger 14 The temperature is lowered to about 400°C, ...

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Abstract

The invention discloses a coal-fired boiler combustion operation method and a combustion operation system. According to the combustion operation method, biomass gasified gas is injected into a hearth to assist fire coal burning. Not only can the problems of the dust deposition, scorification and corrosion be avoided, but the emission concentration of SO2 and NOx can be reduced remarkably, the carbon content of flue dust is reduced, and the high grade use of low grade biomass energy is realized.

Description

technical field [0001] The invention belongs to the field of electric power, and in particular relates to a method for long-term stable combustion of a coal-fired boiler. Background technique [0002] With the increasing scarcity of coal resources and rising market prices, the cost of coal combustion has accounted for more than 70% of the cost of power generation. In order to ensure the normal supply of fuel and reduce fuel costs, most coal-fired power plants enter the plant The coal quality is far worse than the boiler design coal quality , leading to many problems in the operation of the boiler, especially in the low-load stage, frequent combustion instability and even boiler fire extinguishing problems. At present, in order to meet the needs of low-load stable combustion of coal-fired boilers, they are basically equipped with one or more supporting devices of large oil guns, micro-oil or plasma. These configurations meet the requirements of low-load stable combustion of b...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23C1/12F23K5/00
CPCF23C1/12F23K5/002
Inventor 黄启龙孙俊威戴维葆陈国庆阎维平
Owner GUODIAN NANJING ELECTRIC POWER TEST RES CO LTD
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