Variable Heat/power Ratio Cogeneration System

A variable heat and power cogeneration technology, applied in the charging system, turbine/propellant fuel delivery system, energy industry, etc., can solve the problems of flame disappearance, control delay and increase of NOx emission, etc., to ensure combustion stability, NOx little effect
CN104048313AActive Publication Date: 2014-09-17MITSUBISHI POWER LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
MITSUBISHI POWER LTD
Publication Date
2014-09-17

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Abstract

A variable heat / power ratio cogeneration system is provided, which is capable of suppressing the amount of NOx emission to the minimum level while ensuring the stability of combustion of a gas turbine combustor even when the ratio of gasification gas to be used to a normal fuel (such as natural gas or light fuel oil) to be used is changed or the composition of the gasification gas fuel are changed. The variable heat / power ratio cogeneration system includes: a first steam system (301) that injects extra steam on the upstream side of a flame zone with respect to the flow of combustion gas in the combustor (2); a second steam system (302) that is branched from the first steam system (301) and injects extra steam on the downstream side of the flame zone with respect to the flow of the combustion gas in the combustor(2); a first steam flow rate control valve (311) capable of controlling the flow rate of the steam to be injected by the first steam system (301); a second steam flow rate control valve (312) capable of controlling the flow rate of the steam to be injected by the second steam system (302); and a controller (400) that controls the first steam flow rate control valve (311) on the basis of the flow rate of the gasification gas and the flow rate of the normal fuel and controls the second flow rate control valve (312) on the basis of a demanded steam amount necessary for a steam consumption facility.
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Description

technical field

[0001] The invention relates to a heat and power cogeneration system with variable heat and electricity ratio. Background technique

[0002] A heat-to-electricity ratio variable cogeneration system that provides heat and electricity and can change the heat-to-electricity ratio according to the required demand ratio of heat and electricity is expected as a high-efficiency distributed power supply with little energy loss. With the following invention, in this heat-to-electricity ratio variable cogeneration system, in order to prevent the increase of NOx and unburned components, maintain low NOx operation and high combustion efficiency in the full load range, two burners are equipped with steam The injection system measures the concentration of NOx and the concentration of unburned components in the exhaust gas, and controls the water vapor flow rate of each of the above-mentioned two systems according to the concentration (for example, refer to Patent Document ...

Claims

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