System and method for increasing air inlet temperature and fuel calorific value of garbage power station through groove type solar energy

Abstract

The invention provides a system and a method for increasing the air inlet temperature and the fuel calorific value of a garbage power station through groove type solar energy. A groove type solar heat collecting, storing and exchanging system module is additionally arranged on the garbage power station, a garbage pool, a primary air system and a secondary air system of an existing garbage power station are improved, the garbage pool is designed to be a closed system, a first door and a second door of a garbage inlet of the garbage pool are arranged, a first door and a second door are arranged at a feeding hopper of a hearth inlet, an air inlet and the like are formed in the bottom of the garbage pool, and therefore the purpose of heating primary air and secondary air of the garbage power station through the solar energy is achieved. In addition, the heated air is fed into the garbage pool, and therefore the temperature of the garbage pool can be increased. According to the system and the method, the use amount of main steam and first-section extracted steam for heating an air preheater can be remarkably reduced or eliminated, the power generation power and efficiency of a unit are remarkably improved, the fermentation process of garbage in the garbage pool can be promoted by accurately controlling the temperature of the garbage in the garbage pool, the calorific value of the fuel garbage is effectively increased, and therefore the heat efficiency of a waste heat boiler is improved.

Description

technical field [0001] The invention relates to the technical field of waste power generation, and in particular to a system and method for improving the inlet air temperature and fuel calorific value of a waste power station with trough solar energy. Background technique [0002] At present, there are three main methods of harmless treatment of domestic waste, namely sanitary landfill, biological treatment and incineration. Waste incineration waste heat power generation treatment method is currently the most ideal treatment method, which has the characteristics of small project area, fast processing speed, good reduction effect, good pollution control and high energy utilization. [0003] In the thermal system of the waste heat power station that has been put into operation now, the air preheater of the waste heat boiler relies on the main steam and a stage of extraction steam to heat the inlet air temperature of the waste heat boiler, which significantly reduces the power ...

AI Technical Summary

Problems solved by technology

[0003] In the thermal system of the waste heat power station that has been put into operation now, the air preheater of the waste heat boiler relies on the main steam and a stage of extraction steam to heat the inlet air temperature of the waste heat boiler, which significantly reduces the power generation capacity and efficiency of the waste heat power station. For example, in a garbage power station with a high-grade waste heat boiler, the steam consumption of the air preheater of the waste heat boiler is about 12t / h, which leads to a reduction of about 2.0MW in power generation of the unit, a relative reduction of about 8%.

[0004] In addition, during the operation of the waste incineration power plant, it was found that due to the low ambient temperature in winter, the garbage in the garbage pool was frozen, which caused insufficient fermentation of the garbage in the garbage pool, resulting in a decrease in the calorific value of the garbage entering the waste heat boiler

Decrease in temperature and calorific value of garbage will directly affect the stable combustion of boilers, requiring frequent input of diesel fuel to support combustion of garbage, indirectly resulting in increased production costs, reduced power generation and reduced garbage treatment capacity

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