Wide-load heat supply energy-saving system of back pressure type small turbine drive water supply pump

An energy-saving system, back-pressure technology, applied in heating systems, hot water central heating systems, household heating, etc., can solve the problem of poor flexibility in narrow-load operation, lack of electrical load peak shaving energy, and generator set extraction steam supply. Poor thermal economy and other problems, to achieve the effect of improving work output capacity, ensuring safe start and accident shutdown functions, and stabilizing heat supply

Active Publication Date: 2015-10-14
CHINA ENERGY ENG GRP GUANGDONG ELECTRIC POWER DESIGN INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the disadvantages of the existing condensing steam turbine driving the feedwater pump, such as the poor economical efficiency of steam extraction and heat supply, and the inherent narrow load operatio

Method used

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  • Wide-load heat supply energy-saving system of back pressure type small turbine drive water supply pump
  • Wide-load heat supply energy-saving system of back pressure type small turbine drive water supply pump
  • Wide-load heat supply energy-saving system of back pressure type small turbine drive water supply pump

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specific Embodiment 1

[0026] refer to figure 1 The wide-load heat supply and energy-saving system of the back-pressure small steam turbine driving the feed water pump shown includes the main steam turbine, the back-pressure small steam turbine 62, the feed water pump 5, the boiler reheater 4, the deaerator 7 and the low-pressure heater 8, The main steam turbine is equipped with a high-pressure cylinder 1 and a medium-pressure cylinder 2. The exhaust end of the high-pressure cylinder 1 is connected to the steam inlet end of the boiler reheater 4 through a high-temperature exhaust pipe 101, and one of the outlet ends of the boiler reheater 4 is connected to The steam inlet end of the medium-pressure cylinder 2 constitutes a reheat circuit; the second steam outlet end of the boiler reheater 4 is connected to the steam inlet end of the back-pressure small steam turbine 62 through a sub-high temperature steam pipe 111 to form a back-pressure small steam turbine. Heat supply circuit; the power output end...

specific Embodiment 2

[0028] refer to figure 2 As shown, the technical feature of this embodiment is that the water pump 5 is two 50% capacity feedwater pumps, and the two 50% capacity feedwater pumps supply water to two back pressure small steam turbines 62 respectively. The rest are the same as in Example 1.

specific Embodiment 3

[0029] refer to image 3As shown, the technical features of this embodiment are: the heat supply pipe network 501 communicates with the third exhaust port of the medium-pressure cylinder 2 and the steam inlet end of the low-pressure heater 8 through the steam extraction pipe 201, forming a structure for heating condensed water and The extraction and admission steam structure of the heating circuit. The heat supply pipe network 501 is connected to the steam extraction pipe 203 through a switching pipe 502, and the switching pipe 502 is connected to the heat recovery circuit through the steam extraction pipe 203 to form a low-load high heat recovery balance pipe. The feed water pump 5 is a 100% capacity feed water pump. The low pressure heater 8 is a 100% capacity heater. All the other are with embodiment 1.

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Abstract

The invention relates to a wide-load heat supply energy-saving system of a back pressure type small turbine drive water supply pump. The wide-load heat supply energy-saving system comprises a main turbine, a back pressure type small turbine, a water supply pump, a boiler reheater, a deaerator and a low-pressure heater. The steam discharge end of a high-pressure cylinder in the main turbine is connected with the steam inlet end of the boiler reheater, the first steam outlet end of the boiler reheater is connected with the steam inlet end of an intermediate-pressure cylinder, and then a reheating circuit is formed. The second steam outlet end of the boiler reheater is connected with the steam inlet end of the back pressure type small turbine, and then a heat supply circuit is formed. The power output end of the back pressure type small turbine is connected with the drive input end of the water supply pump, and then the water supply pump drive circuit is formed. The first steam discharge opening of the intermediate-pressure cylinder is connected with the steam inlet end of the deaerator through a heat return and steam extraction pipeline, the second steam discharge opening of the intermediate-pressure cylinder is connected with the steam inlet end of a low-pressure heater through a steam extraction pipeline, and then a heat return circuit is formed. A steam extraction and supplementation structure of the heat supply circuit is formed between all connecting pipelines of the low-pressure heater, a condensate water pipeline, the deaerator and the intermediate-pressure cylinder and a heat supply pipeline network. The wide-load heat supply energy-saving system has the advantages that the heat supply running economy is improved, and the high running adjustment flexibility and heat supply economy are achieved.

Description

technical field [0001] The invention relates to a wide-load heat supply and energy-saving system with a back-pressure small steam turbine driving a water pump, which is suitable for heat supply in a thermal power plant. It belongs to the technical field of thermal power generation equipment. Background technique [0002] At present, the application of high-efficiency turbo-generator sets has become the focus of power optimization allocation, while strict energy-saving and emission-reduction indicators require the shutdown of small self-owned power plants and heating boilers of various enterprises, so that large-scale conventional coal-fired power plants need to have both peak-shaving and heating capacity requirements. For the heat supply units of coal-fired conventional thermal power plants, the main thermal systems include reheat system, heat recovery system, heat supply system and feed water pump system. The reheat system means that the exhaust steam after the high-press...

Claims

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Application Information

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IPC IPC(8): F24D3/02F22B33/18
Inventor 郑赟杨劲马雪松邓宏伟黄涛李伟科范永春
Owner CHINA ENERGY ENG GRP GUANGDONG ELECTRIC POWER DESIGN INST CO LTD
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