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Automatic control method of 300 MW grading circulating fluidized bed units

A circulating fluidized bed and automatic control technology, which is applied to electric controllers, fluidized bed combustion equipment, and electric temperature control, etc., can solve the problems of complex coupling relationship and the complexity of the combustion system of circulating fluidized bed boilers. , to achieve the effect of high distribution accuracy and good operation

Active Publication Date: 2008-07-23
云南电力试验研究院(集团)有限公司
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Problems solved by technology

The reason lies in the complexity of the circulating fluidized bed boiler combustion system
Due to the technical characteristics of circulating fluidized bed boilers, it has more input and output variables than ordinary boilers, and the coupling relationship is complicated; in addition, large hysteresis is also a major control difficulty of circulating fluidized bed boilers; in addition, serious nonlinearity and It is a major control difficulty of circulating fluidized bed boilers

Method used

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  • Automatic control method of 300 MW grading circulating fluidized bed units
  • Automatic control method of 300 MW grading circulating fluidized bed units

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Embodiment Construction

[0027] (1) Coordinated automatic control of machines and furnaces

[0028] Improved direct energy balance machine-furnace coordination control method. The steam turbine side load formed by the primary pressure of the steam turbine is used, and the steam drum pressure differential is multiplied by the heat storage coefficient of the boiler to form the heat load of the boiler, which is used as the adjusted quantity of the fuel adjustment in the coordinated control; in the furnace and machine coordination mode The boiler load command composed of four parts superimposed is used as the setting value of fuel adjustment: the current load command of the unit, the change rate of the current load command of the unit multiplied by the compensation coefficient, the change rate of the pre-machine pressure setting value multiplied by the compensation coefficient, the pre-boiler pressure Adjust the output of the main regulator; the adjusted quantity of the turbine power regulator is the elec...

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Abstract

The invention relates to an automatic control method of 300MW grade circulating fluid bed unit, which sets the automatic control methods for the coordination of machine and furnace, the deviation of single bed pressure and double bed pressure, the water level of the deaerator and the condenser, the secondary air quantity / oxygen quantity and the secondary air pressure, the boiler bed temperature, the fuel flow and the limerock feeding during making the first 300 MW circulating fluid bed unit as the localization of manufactures, meanwhile, the 300 MW circulating fluid bed unit has the advantages of stable operation, safety, reliable and remarkable economic operation passing through the coordination and control for the system.

Description

Technical field: [0001] The invention belongs to the technical field of automatic control of 300MW circulating fluidized bed boiler power generation engineering. Background technique: [0002] 300MW large-scale circulating fluidized bed boiler units have been built in batches and gradually put into use in China due to their advantages such as wide fuel adaptability, high combustion efficiency, strong load adaptability and environmental protection. It is currently the main clean coal combustion technology at home and abroad. one of the directions. [0003] In the original small and medium-sized circulating fluidized bed boilers, the automatic combustion control system basically cannot be put into operation, or the input rate is very low, and the actual operation is manual operation. The reason lies in the complexity of the circulating fluidized bed boiler combustion system. Due to the technical characteristics of circulating fluidized bed boilers, it has more input and outp...

Claims

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Application Information

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IPC IPC(8): F23C10/28F22D7/12F23N3/06F23K3/00F23K5/14F23N3/00G05B11/32G05D23/19
Inventor 刘友宽赵明自云江李萍
Owner 云南电力试验研究院(集团)有限公司
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