Operation control device of biomass direct-combustion circulating fluidized bed boiler

Abstract

The invention discloses an operation control device of a biomass direct-combustion circulating fluidized bed boiler. The operation control device is a balanced feeding control device. The operation control device comprises a feeding main regulating loop (1) and multiple feeder balance control circuits (2). The feeder balance control circuits (2) comprise a multi-line balancer (201) and four feeder balance control circuits. After deviation calculation, a feeding control instruction and a controlled variable are input into a feeding main controller; control quantity is calculated by the feeding main controller and is output into the multi-line balancer (201); and a balanced feeding control signal is calculated by the multi-line balancer (201) and is transmitted to the multiple feeder balance control circuits (2) to control feeding amounts of all automatic feeding lines so that biomass fuel is evenly fed into a biomass direct-combustion circulating fluidized bed boiler and thus uniform distribution of a hearth bed temperature is guaranteed. The operation control device is suitable for a biomass direct-combustion circulating fluidized bed boiler, can be successfully used in a first large-scale biomass direct-combustion circulating fluidized bed boiler power plant having a production capacity of 2*50MW, and realizes control of fuel in a biomass direct-combustion circulating fluidized bed boiler, and commercial operation.

Description

technical field [0001] The invention relates to an operation control device suitable for a biomass direct-fired circulating fluidized bed boiler (CFB), especially a multi-line balancer that sends a balanced feed control signal to control multiple feed lines to balance It is a feeding control device that transports biomass fuel into the furnace to ensure that the furnace bed temperature is evenly distributed to meet the combustion control requirements of the furnace with a large aspect ratio. Background technique [0002] In recent years, circulating fluidized bed boilers (CFB) have developed rapidly due to their cleaner combustion methods and wide fuel adaptability, and biomass direct-fired circulating fluidized bed boiler power generation projects have also emerged. The fuel for biomass direct-fired circulating fluidized bed boilers is mainly forestry biomass, agricultural biomass, etc. Specifically, it includes firewood, fallen leaves, bark, roots, forestry processing was...

AI Technical Summary

Problems solved by technology

[0003] Due to the combustion characteristics of biomass fuel, it is difficult for various effective conventional control methods to meet the combustion control requirements of biomass direct-fired circulating fluidized bed boilers. Therefore, it is necessary to focus on the characteristics of biomass direct-fired circulating fluidized bed boilers , develop a unique combustion control method to ensure that biomass fuel enters the furnace evenly, maintain uniform distribution of bed temperature, and maintain combustion stability

Images