Low-concentration gas power generating system based on pulse combustion

Abstract

The invention belongs to the technical field of gas power generation, and relates to a low-concentration gas power generating system based on pulse combustion. The low-concentration gas power generating system based on pulse combustion combines a pulse combustor, a waste heat boiler and a threaded rod expansion unit together, low-concentration gas burns in the pulse combustor and releases heat in the waste heat boiler to heat fed water to generate steam, and the steam enters the threaded rod expansion unit to drive a power generator to generate power; a part of waste steam enters a heat-supply heat exchanger, heat is taken away by circulating water provided by a heat-supply circulating water pump, and condensate water enters a feed pump; the other part of the waste steam enters an open-air condenser, heat is taken away through circulating water provided by a cooling water circulating pump, and condensed water enters the feed pump; and the condensed water is firstly conveyed to an economizer to absorb exhaust smoke heat through the feed pump and then enters the waste heat boiler to absorb heat to be changed into steam, and therefore the steam enters the circulation process again. The low-concentration gas electrical power generating system based on pulse combustion has the beneficial effects that the low-concentration gas electrical power generating system can well adapt to the characteristics that the concentration of gas in our country is low and great in fluctuation, and the use ratio of the gas in our country is increased.

Description

technical field [0001] The invention belongs to the technical field of gas power generation, and in particular relates to a low-concentration gas power generation system based on pulse combustion. Background technique [0002] my country is rich in gas (coal-bed methane) resources, and the reserves within 2000m below the surface are about 35 trillion cubic meters, second only to Russia and Canada. However, the utilization rate of coal mine gas in my country is very low: firstly, because of the low gas concentration in my country, more than 50% of the gas extraction in my country has a concentration of less than 10%, while the existing internal combustion engine power generation technology requires a concentration of more than 8%, and the gas turbine power generation technology requires a concentration of The second is that the gas concentration and production fluctuate greatly with the extraction process. When the concentration is high, it can reach 80%, and when it is low, i...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the above-mentioned deficiencies, and to provide a low-concentration gas power generation system based on pulsating combustion to improve the utilization rate of gas in my country in view of the problem that the existing power generation system is not suitable for the characteristics of low gas concentration and large fluctuations in my country

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