Bypass starting system and starting method of combined cycle extraction condensing and back pressure unit

A technology of back pressure unit and combined cycle, which is applied in the steam generation method using heat carrier, combined engine, machine/engine, etc., can solve problems such as loss of steam working medium, environmental noise pollution, influence, etc., to ensure safety start effect

Active Publication Date: 2016-08-03
ZHEJIANG ELECTRIC POWER DESIGN INST +1
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  • Abstract
  • Description
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Problems solved by technology

[0003] The back pressure unit does not have a condenser, and it needs to exhaust steam to the air when it is started alone. The exhaust steam to the air will cause noise pollution to the environment and have a negative impact on the lives of surrounding residents; loss

Method used

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  • Bypass starting system and starting method of combined cycle extraction condensing and back pressure unit

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Embodiment Construction

[0016] The present invention will be described in detail below in conjunction with accompanying drawing: figure 1 As shown, a start-up bypass system of a combined cycle condensing and back-pressure unit according to the present invention mainly includes: an extraction condensing steam turbine unit 1, a back-pressure steam turbine unit 2, and a condenser 3. The extraction condensing steam turbine unit 1 and the back pressure steam turbine unit 2 are equipped with the same waste heat boiler capacity, and the extraction condensing steam turbine unit 1 is provided with a condenser with a capacity of 100% of the waste heat boiler steam; the extraction condensing steam turbine When the group is in the maximum steam extraction condition, the condenser can accommodate the amount of steam produced when the back pressure steam turbine unit 2 starts; the extraction condensing turbine unit 1 is provided with three bypasses, including the 100% combustion Engine load high pressure bypass 4,...

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Abstract

The invention provides a bypass starting system and starting method of a combined cycle extraction condensing and back pressure unit. The bypass starting system mainly comprises an extraction condensing type steam turbine unit, a back pressure type steam turbine unit and a steam condenser. The waste heat boiler capacity of the extraction condensing type steam turbine unit is the same as that of the back pressure type steam turbine unit. The extraction condensing type steam turbine unit is provided with the steam condenser with 100% waste heat boiler steam quantity. When the extraction condensing type steam turbine unit is under the maximum steam extraction condition, the steam condenser can contain the steam quantity generated during starting of the back pressure type steam turbine unit. The extraction condensing type steam turbine unit is provided with three bypasses including the extraction condensing machine 100% gas turbine load high-pressure bypass, the extraction condensing machine 100% gas turbine load medium-pressure bypass and the extraction condensing machine 100% gas turbine load low-pressure bypass. The back pressure type steam turbine unit is provided with a back pressure turbine 10% gas turbine load high-pressure bypass, a back pressure turbine 10% gas turbine load medium-pressure bypass, a back pressure turbine 15% gas turbine load medium-pressure bypass, and a back pressure turbine 100% gas turbine load low-pressure bypass.

Description

technical field [0001] The invention relates to a start-up bypass system and a start-up method of a combined cycle condensate extraction and back pressure unit, which is suitable for a "one-to-one" gas-steam combined cycle unit and belongs to the technical field of gas-steam combined cycle. Background technique [0002] my country is in the process of adjusting the energy structure, and vigorously develops gas-steam combined cycle technology. This technology not only produces electric energy, but also uses low-quality waste heat after power generation for heating, which greatly improves energy utilization and has a good social impact. efficiency, energy saving benefits and environmental benefits. [0003] The back pressure unit does not have a condenser, and it needs to exhaust steam to the air when it is started alone. The exhaust steam to the air will cause noise pollution to the environment and have a negative impact on the lives of surrounding residents; loss. Contents...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01K7/00F01D13/00F28D1/00F22B1/18
Inventor 邵杰陈书平李琪张又新张卫灵陈丰任渊源石伟栋丁雁湘林俊光
Owner ZHEJIANG ELECTRIC POWER DESIGN INST
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