Superhigh-temperature subcritical gas power generation system

Abstract

The invention relates to a superhigh-temperature subcritical gas power generation system which comprises a gas boiler and a generator set, wherein the generator set comprises a steam turbine connectedwith a gas boiler pipeline, the gas boiler comprises a hearth and a water cooling wall in the boiler, a gas-gas heat exchanger is connected with the gas boiler through a blast furnace gas pipeline, and a first layer combustor, a second layer combustor and a third layer combustor are arranged in the hearth of the gas boiler. The superhigh-temperature subcritical gas power generation system disclosed by the invention can fully utilize abundant low calorific value gas to generate power, can achieve optimal configuration of enterprise resources, can reduce comprehensive energy consumption, comparable energy consumption and production cost of enterprises and can increase economic benefits and market competition of the enterprises. High-temperature flue gas generated in the production process can be used for heating raw materials of gas, water, steam and the like through varieties of heat exchange modes, so that operation cost is further reduced.

Description

technical field [0001] The invention relates to a power generation system, in particular to an ultra-high temperature subcritical gas power generation system. Background technique [0002] With the rapid development of the iron and steel industry, a large number of by-products are produced in the production process, and blast furnace gas is one of them. Affected by low calorific value and unstable combustion, blast furnace gas has always had a low utilization rate, which restricts the development of enterprises. [0003] After the gas balance calculation of the existing enterprises, there is a large amount of surplus blast furnace gas. The main components of the blast furnace gas are: CO, CO2, H2, CH4, N2, etc., of which CO content is 22.73% as the main combustible component, H2 content is 0.67%, CH4 content 0.11% is very little. In addition, the endothermic components N2 content 58.03 and CO2 content 18.95% account for a relatively large proportion, resulting in a low gas ...

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Problems solved by technology

Affected by low calorific value and unstable combustion, the utilization rate of blast furnace gas has been very low, which restricts the development of enterprises

[0003] After the gas balance calculation of the existing enterprises, there is a large amount of surplus blast furnace gas. The main components of the blast furnace gas are: CO, CO2, H2, CH4, N2, etc., of which CO content is 22.73% as the main combustible component, H2 content is 0.67%, CH4 content 0.11% is very little. In addition, the endothermic components N2 content of 58.03 and CO2 content of 18.95% account for a relatively large proportion, resulting in a low gas calorific value of about 2882KJ / Nm3

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