Fuel-self-balancing-based bed temperature control system and method for circulating fluidized bed boiler

A circulating fluidized bed, self-balancing technology, applied in the combustion method, fluidized bed combustion equipment, fuel burning in the molten state, etc., can solve the problems of easy local overtemperature and uneven furnace bed temperature distribution.
CN104807003AActive Publication Date: 2015-07-29DATANG WUAN POWER GENERATION
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
DATANG WUAN POWER GENERATION
Publication Date
2015-07-29

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Abstract

The invention discloses a coal supply self-balancing system and method for bed temperature control of a circulating fluidized bed boiler. The system comprises a coal supply main-control adjustment loop and a multi-execution coal supply adjustment loop, wherein the coal supply main-control adjustment loop receives a coal supply main command output by a boiler main controller; the output command is sent to two sides of the multi-execution coal supply adjustment loop respectively; after calculation on each side, automatic coal supply commands are respectively distributed to all automatic coal feeders according to a certain proportion, so that the coal supply quantity conforms to the command requirement of the system. The coal supply self-balancing system and method have the benefit that the bed temperature of the circulating fluidized bed boiler is kept stable by the fuel self-balancing method, so that unit load fluctuation caused by frequent adjustment of the primary air quantity is avoided.
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Description

technical field

[0001] The invention belongs to the field of coal feeding control of thermal power generating units, and in particular relates to a system and method for controlling bed temperature of a circulating fluidized bed boiler based on fuel self-balancing. Background technique

[0002] Circulating fluidized bed boiler (CFB) combustion technology is a clean coal combustion technology that has developed rapidly in the past 30 years. Due to its wide fuel adaptability, wide load adjustment ratio, high combustion efficiency, low temperature combustion, and desulfurization in the furnace It has been rapidly promoted at home and abroad, especially because of the complex and changeable coal quality, high sulfur content and large output of low-quality coal in my country's coal resources, which makes CFB combustion technology get faster and wider application in my country.

[0003] The bed temperature is an important parameter to characterize the normal operation of the CFB bo...

Claims

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