Control system for stable dual-fuel load switching of solid heat carrier furnace

Abstract

The invention belongs to the technical field of garbage pyrolysis, and particularly relates to a control system for stable dual-fuel load switching of a solid heat carrier furnace. The control system is connected to the combustor through a fuel gas pipeline to achieve switching of double fuels. The heat value of the auxiliary fuel and the heat value of the pyrolysis gas are converted, in the process that the auxiliary fuel is switched into the pyrolysis gas, the flow of the auxiliary fuel is gradually reduced by adjusting the opening degree of an auxiliary fuel pneumatic adjusting valve, and meanwhile the flow of the corresponding converted pyrolysis gas is gradually increased by adjusting a pyrolysis gas pneumatic adjusting valve; and the same method is suitable for the process of switching the pyrolysis gas to the auxiliary fuel, so that the combustion heat value of the fuel entering the combustor is basically in a stable state, and the temperature in the solid heat carrier furnace is stable. The combustor is provided with three infrared & ultraviolet dual-mode flame detectors which are used for detecting the flame of the incandescent light, the flame of the auxiliary fuel and the flame of the pyrolysis gas, the reliability of flame detection is improved by adopting a two-out-of-three mode, and the stability of flame detection in the switching process is improved.

Description

technical field [0001] The invention belongs to the technical field of garbage pyrolysis, and in particular relates to a control system for stable switching of dual-fuel loads of a solid heat carrier furnace. Background technique [0002] Compared with large-scale landfills, incineration plants and other waste treatment facilities, the waste pyrolysis gasification technology has the advantages of no secondary pollution emissions and resource utilization. Its environmental and social impacts are small, which can weaken government transportation and land selection. The government's guidance is more efficient and convenient, and it can solve the problem of urban domestic waste disposal in a timely and thorough manner. Therefore, waste pyrolysis gasification technology is expected to become a new technical direction to replace waste incineration. [0003] The solid heat carrier furnace uses auxiliary fuel to heat the heat carrier, and then carries it to the pyrolysis unit throug...

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Problems solved by technology

[0006] In the waste pyrolysis process, because the composition and calorific value of the waste change, the calorific value of the pyrolysis gas of the pyrolysis product changes, and the type of auxiliary fuel is uncertain. The conventional switching control system It cannot meet the control requirements, so in the process of fuel switching, it is necessary to fully consider the impact of changes in the heat value of pyrolysis gas on the entire switching process

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