A parallel operation of waste incineration power generation thermal system

Abstract

The present invention proposes a thermal system for power generation by waste incineration in parallel operation, which includes a high-parameter waste heat boiler, a high-parameter steam turbine, a medium-low parameter waste heat boiler, and a medium-low parameter steam turbine; the outlet of the high-parameter waste heat boiler is connected to the high-pressure steam inlet of the high-parameter steam turbine through a pipeline The outlet of the medium and low parameter waste heat boiler is respectively connected to the medium and low pressure steam inlet of the high parameter steam turbine and the steam inlet of the medium and low parameter steam turbine through the pipeline; the high parameter steam turbine drives the first generator to generate electricity through the gearbox; The parameter steam turbine directly drives the second generator to generate electricity; the medium and low pressure steam inlet of the high parameter steam turbine is used to absorb the increased steam of the medium and low parameter waste heat boiler. During the operation of the system, the exhaust parameters of the two steam turbines are the same, and the condensed water heat recovery system and the deaeration system are shared. The thermal system can reduce auxiliary equipment, reduce investment and operation and maintenance costs, and make full use of the thermal load of waste heat boilers with medium and low parameters to improve the power generation efficiency and economic benefits of the power plant.

Description

technical field [0001] The invention belongs to the technical field of waste incineration power generation, and in particular relates to a waste heat power generation thermal system that satisfies the parallel operation of two different parameters of a waste incineration power plant and can cope with the increase of the calorific value of waste resulting in the increase of boiler steam volume. Background technique [0002] With the development of the country's economy and society, the amount of urban domestic waste is getting larger and larger, and the calorific value of waste is also getting higher and higher. Due to the harsh site selection conditions for waste incineration power plants, some waste incineration power plants need to be expanded to meet the growing waste disposal needs. When considering the expansion of a waste-to-energy power plant, in order to pursue higher power generation income, a thermal system with higher parameters is usually used, which will lead to...

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Problems solved by technology

[0003] In view of the above problems, the present invention provides a thermal system that can meet the parallel operation of two different main steam parameters of waste incineration power plants, and this system can effectively solve the problem of increased steam production of the original boiler due to the increase in the calorific value of waste. It can reduce the number of auxiliary equipment, reduce investment and operation and maintenance costs, and make full use of the heat load of the waste heat boiler with medium and low parameters, and improve the power generation efficiency and economic benefits of the power plant

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