Garbage and gas-steam combined cycle power generation system adopting gas for drying garbage

Abstract

The invention discloses a garbage and gas-steam combined cycle power generation system adopting gas for drying garbage. The garbage and gas-steam combined cycle power generation system comprises a garbage incineration generator set and a gas-steam combined cycle generator set. The garbage incineration generator set comprises a garbage drier adopting gas for drying garbage, a garbage incinerator, a first turbine and a first generator. The gas-steam combined cycle generator set comprises a gas compressor, a combustion chamber, a turbine, a second turbine and a second generator, all of which are connected in sequence and further comprises a waste heat boiler connected with the turbine through a smoke discharging pipeline, and a second thermodynamic cycle pipeline connected between the waste heat boiler and the second turbine. A smoke pipeline is connected between the waste heat boiler and the garbage drier and is used for leading a small part of low-temperature gas in the waste heat boiler into the garbage drier to serve as a drying heat source for water-containing garbage, and the water-containing garbage can be dried. The garbage and gas-steam combined cycle power generation system has the beneficial effects that the service life of the incinerator is prolonged, the heat efficiency of the incinerator is improved, the combustion supporting coal amount is reduced, and the environment pollution is reduced.

Description

technical field [0001] The invention relates to a garbage and gas-steam combined cycle power generation system, in particular to a garbage and gas-steam combined cycle power generation system using gas to dry the garbage. Background technique [0002] In recent decades, with the rapid development of my country's economy and the continuous advancement of urbanization, the garbage generated in cities is increasing day by day, and the problem of garbage disposal is imminent. Waste incineration power generation technology has the characteristics of small footprint, high degree of reduction, low impact on the environment, resource utilization of waste, etc., and has broad development prospects. [0003] Since garbage classification is not generally implemented in urban garbage in my country, the moisture content is relatively high, usually 35%-60%, and the higher the moisture content of the garbage, the lower its calorific value. Undried garbage enters the garbage incinerator fo...

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Problems solved by technology

[0007] In order to solve the poor dehydration effect of composting fermentation method in garbage drying, which is easy to produce secondary pollution; and the existing heating and drying method using external heat source is complicated in system, and the energy is not cascaded and rationally utilized, resulting in low energy utilization rate; using waste incinerator outlet flue gas drying The method is extremely prone to low-temperature corrosion, and it is difficult to meet the requirements of garbage drying with a relatively high moisture content. In order to realize the safe, economical and environmentally friendly operation of the garbage incinerator, the invention provides a garbage and gas-steam combined cycle that uses gas to dry garbage. Power system

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