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Gas-steam combined system and operation control method thereof

A combined system and gas-steam technology, applied in the energy field, can solve problems such as long payback period, unfavorable promotion, and increased initial investment of power plants, and achieve the effects of improving thermal efficiency, reducing impact, and reducing drainage temperature

Active Publication Date: 2017-07-11
CHINA ENERGY ENG GRP GUANGDONG ELECTRIC POWER DESIGN INST CO LTD
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0002] The operating conditions of the gas-steam combined system are adjusted in real time according to its load status. Due to load changes, the gas-steam combined system often cannot generate electricity at full load, and the efficiency of the gas-steam combined system is relatively low at low loads
[0003] At present, the main way to improve the steam cycle efficiency is to increase the steam inlet parameters of the steam turbine to improve the work efficiency of the steam turbine. However, choosing a steam turbine and waste heat boiler with a higher pressure and higher temperature will greatly increase the initial investment of the power plant and the payback period. Longer, whether it is a new unit or an old unit renovation, it is not conducive to popularization

Method used

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  • Gas-steam combined system and operation control method thereof
  • Gas-steam combined system and operation control method thereof

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Experimental program
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Effect test

Embodiment 1

[0025] Such as figure 1 As shown, the combined gas-steam system includes: a gas turbine 100 , a steam cycle loop, an absorption heat pump 300 , and a preheating heat exchanger 310 . Among them, a waste heat boiler 210, a steam turbine 220, and a condenser 230 are arranged on the steam circulation circuit, and a steam extraction port is arranged on the steam turbine 220; the absorption heat pump 300 has a matching first heat exchange channel, a second heat exchange channel channels, and drive heat source channels; the preheating heat exchanger 310 has a third heat exchange channel and a fourth heat exchange channel; the inlet of the drive heat source channel is docked with the steam extraction port, and the outlet of the drive heat source channel is connected to the condenser The steam inlet of 230 is docked; the inlet of the first heat exchange channel is connected with the cooling water outlet of the condenser 230, and the outlet of the first heat exchange channel is connecte...

Embodiment 2

[0035] The difference between embodiment two and embodiment one is:

[0036] Such as figure 2 As shown, the absorption heat pump is not connected to the cooling tower, but directly connected to the ambient cold source such as the river. Due to the utilization of the low-grade energy of the cooling water of the condenser through the absorption heat pump, the temperature of the cooling water discharged to the outside is reduced to 25°C to 35°C, which has little impact on the environment and ecology and can be discharged directly.

[0037] The inlet of the fourth heat exchange channel is connected to the fuel source, and the preheating heat exchanger 310 heats the fuel entering the gas turbine 100 .

[0038] The combined gas-steam system also includes a fuel heater 410. The fuel heater 410 has a matching fifth heat exchange channel and a sixth heat exchange channel. The pumping port is connected, the outlet of the fifth heat exchange channel is connected to the feed water inle...

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Abstract

The invention relates to and provides a gas-steam combination system and an operation control method thereof. The gas-steam combination system comprises a gas turbine, a steam circulation loop, an absorption type heat pump and a preheating heat exchanger, wherein a waste heat burner, a steam turbine and a condenser are arranged on the steam circulation loop; a extraction opening is formed in the steam turbine; the absorption type heat pump is provided with a first heat exchange channel, a second heat exchange channel and a driving heat source channel which are matched with each other; the preheating heat exchanger is provided with a third heat exchange channel and a fourth heat exchange channel which are matched with each other; partial vapor in the steam turbine enters the driving heat source channel from the extraction opening and is adopted as the driving force of the absorption type heat pump, so that a circulation working medium is heated in the second heat exchange channel, and cooling water is cooled in the first heat exchange channel; and the heated circulation working medium heats air or fuel flowing through the fourth heat exchange channel, and the temperature of air or flue entering the gas turbine is increased.

Description

technical field [0001] The invention belongs to the field of energy, and in particular relates to a gas-steam combined system and an operation control method thereof. Background technique [0002] The operating conditions of the gas-steam combined system are adjusted in real time according to its load status. Due to load changes, the gas-steam combined system often cannot generate electricity at full load, and the efficiency of the gas-steam combined system is relatively low at low loads. [0003] At present, the main way to improve the steam cycle efficiency is to increase the steam inlet parameters of the steam turbine so as to improve the work efficiency of the steam turbine. However, choosing a steam turbine and waste heat boiler with a higher pressure and higher temperature will greatly increase the initial investment of the power plant and the payback period. Longer, whether it is a new unit or an old unit renovation, it is not conducive to promotion. Contents of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01K23/10F02C7/08F02C7/224
CPCF01K23/10F02C7/08F02C7/224
Inventor 郑赟梁著文邓宏伟范永春
Owner CHINA ENERGY ENG GRP GUANGDONG ELECTRIC POWER DESIGN INST CO LTD
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