Starting bed material setting method and device for circulating fluidized bed

Abstract

The invention relates to a starting bed material setting method and device for a circulating fluidized bed. The method includes the steps: S1, receiving coal type parameters, fuel flow rate parameters, fire coal ash-formation characteristic parameters and separator performance parameters; S2, according to a preset equilibrium calculation model and the received parameters, calculating the initial bed stock and / or initial bed material grain-size distribution required for starting of the circulating fluidized bed; and S3, according to the calculation results, setting the initial bed stock and / or the initial bed material grain-size distribution of the circulating fluidized bed. By adopting the method and the device, the most suitable starting bed stock and the initial bed material grain-size distribution can be set for the circulating fluidized bed according to the different working parameters of the circulating fluidized bed.

Description

technical field [0001] The invention relates to the technical field of circulating fluidized beds, in particular to a method for setting a starting bed material for a circulating fluidized bed and a device for setting a starting bed material for a circulating fluidized bed. Background technique [0002] As one of the clean coal combustion technologies, circulating fluidized bed combustion is especially suitable for burning low-quality fuels such as high sulfur, high ash, and low volatile matter that are difficult to burn in conventional pulverized coal furnaces. It is an important measure and technical approach to realize the comprehensive utilization of coal . However, circulating fluidized bed combustion technology is still a developing technology. In actual operation, circulating fluidized bed boilers have many engineering and technical difficulties that need to be solved urgently, such as high plant power consumption rate, low combustion efficiency, and low availability....

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the bed material thickness and particle size distribution laid in the furnace do not follow a certain theoretical basis when the circulating fluidized bed starts, which leads to difficulties in self-starting of the circulating fluidized bed boiler and a low input rate of automatic control , the start-up time is too long, and the start-up fuel consumption is too large

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