CN103628985A - System for heating natural gas by using waste heat of waste heat boiler in gas turbine power plant - Google Patents

System for heating natural gas by using waste heat of waste heat boiler in gas turbine power plant Download PDF

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Publication number
CN103628985A
CN103628985A CN201310700226.8A CN201310700226A CN103628985A CN 103628985 A CN103628985 A CN 103628985A CN 201310700226 A CN201310700226 A CN 201310700226A CN 103628985 A CN103628985 A CN 103628985A
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CN
China
Prior art keywords
natural gas
gas
pipeline
waste heat
heat exchanger
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Pending
Application number
CN201310700226.8A
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Chinese (zh)
Inventor
徐磊
祁金胜
周高强
吕玉红
李洪超
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Shandong Electric Power Engineering Consulting Institute Corp Ltd
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Shandong Electric Power Engineering Consulting Institute Corp Ltd
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Application filed by Shandong Electric Power Engineering Consulting Institute Corp Ltd filed Critical Shandong Electric Power Engineering Consulting Institute Corp Ltd
Priority to CN201310700226.8A priority Critical patent/CN103628985A/en
Publication of CN103628985A publication Critical patent/CN103628985A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a system for heating natural gas by using waste heat of a waste heat boiler in a gas turbine power plant. The system comprises a tail heat exchanger, a natural gas heater, a pipeline I for connecting a water outlet of the tail heat exchanger with a water inlet of the natural gas heater, a pipeline II for connecting a water inlet of the tail heat exchanger with a water outlet of the natural gas heater, and a bypass pipeline III for connecting a natural gas inlet with a natural gas outlet, wherein a stop valve I is arranged on the pipeline I, a booster pump is arranged on the pipeline II, a stop valve II and a stop valve III are respectively before and behind the booster pump, and a normally-closed ball valve is arranged on the pipeline III. By adopting the system, the temperature of the natural gas is increased by 12 DEG C, the temperature of smoke discharged from the waste heat boiler is reduced by 9 DEG C, the waste heat of the smoke discharged from the waste heat boiler is recovered, the heat pollution of the gas turbine power plant to the environment is alleviated, and the cost of the natural gas of one 9F-class gas turbine can be saved.

Description

Fire dynamo-electric factory exhaust heat boiler and utilize waste-heat natural gas system
Technical field
The present invention relates to a kind of heated by natural gas system, the dynamo-electric factory of especially a kind of combustion exhaust heat boiler utilizes waste-heat natural gas system.
Background technique
For the dynamo-electric factory of combustion, for guaranteeing that gas turbine combustion is stable, all to supply rock gas, there are some to limit, be mainly condensable gas in composition, heating value, temperature, pressure, rock gas, solid particle, Sulpher content etc.Before entering combustion machine, rock gas needs rock gas to process, mainly solid particle and the drop impurity of removing rock gas, natural gas temperature, pressure are adjusted to specified value, make the rock gas that enters gas turbine meet the demand of technical standard of Ran Ji producer to rock gas.
Natural gas processing is divided into two modules: voltage regulating station module and preposition module.The effect of voltage regulating station is to natural gas filtering, metering, heating (as need), pressure regulation; The effect of preposition module is that rock gas is further filtered, heated.
The rock gas of carrying generally at least needs the degree of superheat of 5 ℃, if the natural gas temperature at payment point place, upstream can not meet the ,Xu voltage regulating station module that requires of the degree of superheat, heating unit is set.For heating unit, existing technology generally has two kinds of modes: the heating of water-bath stove, electric heater heating.Though prior art can meet the requirement of heated by natural gas, there is very large drawback:
1, water-bath stove heat protocol: a part of rock gas of the fuel of water-bath stove for extracting from natural-gas transfer pipeline, first the heat that this part combustion of natural gas produces transmits feedwater, heated water again with heat exchange gas, by heated by natural gas to the temperature needing.Water liquid furnace heating rock gas is quite wasted, and does not both make full use of the cold energy effect of rock gas, has consumed in vain again a large amount of rock gases.In addition, coil pipe fouling, the etching problem of water-bath stove are comparatively serious, need periodical repair, greatly reduce the usability of water-bath stove.
2, electric heater heat protocol: adopt electric heater to heat rock gas, this scheme initial cost is less, but operation energy consumption is high, needs the station service that consumes a large amount of electric energy ,Shi power plant significantly to raise, and reduces in the long run the Economy of power plant.
From the angle of energy conservation, the heated energy source of rock gas is all this part rock gas extracting from natural-gas transfer pipeline.Water-bath stove heat protocol is combustion of natural gas heating water, and water heats rock gas again; The scheme of electric heater is that high temperature, the high-pressure gas propelling gas turbine engine that rock gas and air burning produce rotates, and gas turbine drives generator generating again, and an electricity part of sending flows to electric heater rock gas is heated.As everyone knows, the medium tache of the using energy source more consumption of multipotency is just more, the utilization ratio of the energy is also just lower, and it is relative higher that water-bath stove heat protocol and electric heater heat protocol are compared energy utilization rate, so prior art generally adopts water-bath stove heat protocol.
Summary of the invention
Object of the present invention is exactly in order to address the above problem, proposed the dynamo-electric factory of a kind of combustion exhaust heat boiler and utilized waste-heat natural gas system, this system architecture is simple, and investment cost is not high, reduced the temperature of exhaust fume of exhaust heat boiler, alleviated and fired the thermo-pollution of dynamo-electric factory to environment.
To achieve these goals, the present invention adopts following technological scheme:
The dynamo-electric factory of a kind of combustion exhaust heat boiler utilizes waste-heat natural gas system, comprise: afterbody heat exchanger, gas heater, the pipeline I that connects afterbody heat exchanger water outlet and gas heater water intake, the pipeline II that connects afterbody heat exchanger water intake and gas heater water outlet, and the bypass duct III that connects rock gas suction port and air outlet; Described pipeline I is provided with stop valve I, in described pipeline II, suction booster is set, and before and after suction booster, is respectively equipped with stop valve II and stop valve III, in described pipeline III, is provided with normally-closed ball valve; Described gas heater suction port is connected with outlet conduit with the import of rock gas respectively with air outlet.
In described pipeline II, be arranged in parallel two suction boosters, operation of described two suction boosters, one is standby.
Circulating water in described afterbody heat exchanger is heated by the smoke evacuation of exhaust heat boiler, and the circulating water after heating enters gas heater, enters exhaust heat boiler afterbody heat exchanger with the circulating water after heat exchange gas through suction booster pressurization, carries out next one circulation.
The invention has the beneficial effects as follows: the present invention is simple in structure, investment cost is not high, adopt the smoke discharging residual heat of exhaust heat boiler to heat rock gas, not only save a large amount of rock gases that water-bath stove scheme is burnt, also reduced the temperature of exhaust fume of exhaust heat boiler, alleviated and fired the thermo-pollution of dynamo-electric factory to environment; Adopt said system, can make natural gas temperature improve 12 ℃, exhaust heat boiler temperature of exhaust fume reduces by 9 ℃, has reclaimed exhaust heat boiler smoke discharging residual heat, can alleviate the thermo-pollution of the dynamo-electric factory of combustion to environment.The present invention can make 9F level combustion machine save every year approximately 2,200,000 yuan of the expenses of rock gas.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Wherein, 1. afterbody heat exchanger, 2. stop valve I, 3. gas heater, 4. stop valve II, 5. suction booster, 6. stop valve III, 7. ball valve, 8. normally-closed ball valve, 9. pipeline I, 10. pipeline II, 11. pipeline III.
Embodiment:
Below in conjunction with accompanying drawing and embodiment, the present invention will be further described:
As shown in Figure 1, the dynamo-electric factory of a kind of combustion exhaust heat boiler utilizes waste-heat natural gas system, comprises an afterbody heat exchanger 1; A gas heater 3; Article one, connect the pipeline I of afterbody heat exchanger 1 water outlet and gas heater 3 water intakes, in pipeline I, be provided with stop valve I2; Article one, connect the pipeline II of afterbody heat exchanger 1 water intake and gas heater 3 water outlets, be provided with 5, one operations of suction booster in pipeline II, one standby, is provided with a stop valve II4 and stop valve III6 before and after every suction booster; Article one, connect the bypass duct III of gas heater 3 suction ports and air outlet, in bypass duct III, be provided with normally-closed ball valve 8; Gas heater 3 suction ports and air outlet are also connected import and the outlet conduit of rock gas, are provided with ball valve 7 on this pipeline.
In afterbody heat exchanger 1, the smoke evacuation Heating Cyclic water of exhaust heat boiler, heated circulating water enters 3 pairs of rock gases of gas heater and heats, after suction booster 5 pressurizations, enter the smoke discharging residual heat that exhaust heat boiler afterbody heat exchanger 1 absorbs exhaust heat boiler with the circulating water being cooled after heat exchange gas, carry out next one circulation, this system is closed circulation system.
Although above-mentioned, by reference to the accompanying drawings the specific embodiment of the present invention is described; but be not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technological scheme of the present invention, those skilled in the art do not need to pay various modifications that creative work can make or distortion still in protection scope of the present invention.

Claims (3)

1. the dynamo-electric factory of a combustion exhaust heat boiler utilizes waste-heat natural gas system, it is characterized in that, comprise: afterbody heat exchanger, gas heater, the pipeline I that connects afterbody heat exchanger water outlet and gas heater water intake, the pipeline II that connects afterbody heat exchanger water intake and gas heater water outlet, and the bypass duct III that connects rock gas suction port and air outlet; Described pipeline I is provided with stop valve I, in described pipeline II, suction booster is set, and before and after suction booster, is respectively equipped with stop valve II and stop valve III, in described pipeline III, is provided with normally-closed ball valve; Described gas heater suction port is connected with outlet conduit with the import of rock gas respectively with air outlet.
2. the dynamo-electric factory of a kind of combustion as claimed in claim 1 exhaust heat boiler utilizes waste-heat natural gas system, it is characterized in that, is arranged in parallel two suction boosters in described pipeline II, operation of described two suction boosters, and one is standby.
3. the dynamo-electric factory of a kind of combustion as claimed in claim 1 exhaust heat boiler utilizes waste-heat natural gas system, it is characterized in that, circulating water in described afterbody heat exchanger is heated by the smoke evacuation of exhaust heat boiler, circulating water after heating enters gas heater, through suction booster pressurization, enter exhaust heat boiler afterbody heat exchanger with the circulating water after heat exchange gas, carry out next one circulation.
CN201310700226.8A 2013-12-18 2013-12-18 System for heating natural gas by using waste heat of waste heat boiler in gas turbine power plant Pending CN103628985A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310700226.8A CN103628985A (en) 2013-12-18 2013-12-18 System for heating natural gas by using waste heat of waste heat boiler in gas turbine power plant

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Application Number Priority Date Filing Date Title
CN201310700226.8A CN103628985A (en) 2013-12-18 2013-12-18 System for heating natural gas by using waste heat of waste heat boiler in gas turbine power plant

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106524214A (en) * 2016-12-23 2017-03-22 山东电力工程咨询院有限公司 Ignition gas system of gas turbine power plant and ignition method of ignition gas system
CN111577460A (en) * 2020-05-09 2020-08-25 广州华跃电力工程设计有限公司 Method for improving efficiency of gas turbine and removing white smoke
CN112762714A (en) * 2020-12-31 2021-05-07 重庆长江造型材料(集团)股份有限公司 Combustion control method of fluidized roasting furnace

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US5357746A (en) * 1993-12-22 1994-10-25 Westinghouse Electric Corporation System for recovering waste heat
US5845481A (en) * 1997-01-24 1998-12-08 Westinghouse Electric Corporation Combustion turbine with fuel heating system
CN1737351A (en) * 2005-09-01 2006-02-22 西安交通大学 System and method for improving efficiency of combined cycle electric power plant
US20100024429A1 (en) * 2008-07-29 2010-02-04 General Electric Company Apparatus, system and method for heating fuel gas using gas turbine exhaust
CN101922356A (en) * 2009-06-08 2010-12-22 通用电气公司 The system that relates to turbogenerator control and operation
CN102140965A (en) * 2010-02-02 2011-08-03 通用电气公司 Fuel heater system including hot and warm water sources
CN102322354A (en) * 2010-05-19 2012-01-18 通用电气公司 Be used for system and method at the power equipment pre-heating fuel
CN103016157A (en) * 2011-09-23 2013-04-03 通用电气公司 Fuel heating in combined cycle turbomachinery
CN203614234U (en) * 2013-12-18 2014-05-28 山东电力工程咨询院有限公司 System for heating natural gas by using waste heat of waste heat boiler of gas turbine power plant

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5357746A (en) * 1993-12-22 1994-10-25 Westinghouse Electric Corporation System for recovering waste heat
US5845481A (en) * 1997-01-24 1998-12-08 Westinghouse Electric Corporation Combustion turbine with fuel heating system
CN1737351A (en) * 2005-09-01 2006-02-22 西安交通大学 System and method for improving efficiency of combined cycle electric power plant
US20100024429A1 (en) * 2008-07-29 2010-02-04 General Electric Company Apparatus, system and method for heating fuel gas using gas turbine exhaust
CN101922356A (en) * 2009-06-08 2010-12-22 通用电气公司 The system that relates to turbogenerator control and operation
CN102140965A (en) * 2010-02-02 2011-08-03 通用电气公司 Fuel heater system including hot and warm water sources
CN102322354A (en) * 2010-05-19 2012-01-18 通用电气公司 Be used for system and method at the power equipment pre-heating fuel
CN103016157A (en) * 2011-09-23 2013-04-03 通用电气公司 Fuel heating in combined cycle turbomachinery
CN203614234U (en) * 2013-12-18 2014-05-28 山东电力工程咨询院有限公司 System for heating natural gas by using waste heat of waste heat boiler of gas turbine power plant

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106524214A (en) * 2016-12-23 2017-03-22 山东电力工程咨询院有限公司 Ignition gas system of gas turbine power plant and ignition method of ignition gas system
CN111577460A (en) * 2020-05-09 2020-08-25 广州华跃电力工程设计有限公司 Method for improving efficiency of gas turbine and removing white smoke
CN112762714A (en) * 2020-12-31 2021-05-07 重庆长江造型材料(集团)股份有限公司 Combustion control method of fluidized roasting furnace

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Application publication date: 20140312