System for power generation by utilizing thermal decomposition gas of domestic garbage

Abstract

The invention discloses a system for power generation by utilizing thermal decomposition gas of domestic garbage. The system comprises a garbage sieving device, a garbage thermal-decomposition device and a power generating device, wherein sorted garbage is conveyed into a garbage feeding port of the garbage thermal-decomposition device by a garbage conveying belt; a high-temperature gas outlet of the garbage thermal-decomposition device is connected with a gas turbine; a gas exhausting port of the gas turbine is connected with a high-speed gas inlet of the garbage sieving device; moderate-heat-value fuel gas generated by thermal decomposition is used for heating and burning of a garbage sealing and thermal-decomposition furnace. The system disclosed by the invention has the advantages that the heat is utilized for continuous thermal decomposition of the garbage in the sealed thermal-decomposition furnace so as to implement continuous self-feeding and self-use purposes of the fuel gas, and is utilized for driving the gas turbine to do work and generate power, and high-temperature and high-speed tail gas exhausted by the gas turbine is used for sieving the garbage, and by repeated circulation, the difficulty in treating the domestic garbage in most cities can be solved, the garbage burning can be prevented from exhausting dioxin-polluted gas and dust to the atmosphere, and deposited sewage generated by garbage landfill is also avoided.

Description

technical field [0001] The invention relates to a power generation system using garbage, in particular to a system for generating electricity by thermally decomposing domestic garbage. Background technique [0002] With the expansion of cities in our country and the gradual implementation of the policy of turning some rural areas into urbanization, the domestic waste discarded by urban residents is increasing rapidly, and it is imminent to solve the pollution of domestic waste to the surrounding environment of the city. Landfill and incineration are used in most places to deal with urban domestic waste. Landfilling waste not only wastes land, but also causes seepage of waste and dirty water at the bottom of the pit, which will seriously pollute land and groundwater resources. However, if the incineration of garbage does not control the combustion temperature of the garbage and the treatment of flue gas discharge, it will emit fly ash, sulfur oxide, hydrogen chloride, dioxin ...

AI Technical Summary

Problems solved by technology

Garbage sorting has always been the bottleneck of garbage treatment technology. Whether it is incineration, landfill treatment process, or comprehensive treatment process, incomplete garbage sorting will lead to the failure of the next process and the normal operation of the entire production line.

[0004] The conventional pyrolysis furnace burns biomass and garbage at the bottom of the furnace, and the garbage and biomass above the furnace are baked, and the gas flows out from the upper gas outlet. Due to anaerobic combustion and baking of biomass and garbage, it generates heat. Decomposition, with a lot of nitrogen mixed in the gas, so it is a fuel gas with low calorific value, which is not conducive to chemical extraction and effective utilization of fuel gas. How to screen domestic waste and decompose it into gas with higher calorific value for power generation is currently a problem for people Direction of the research

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