CN206972383U - A kind of heated by natural gas system for Combined cycle gas-steam turbine - Google Patents

A kind of heated by natural gas system for Combined cycle gas-steam turbine Download PDF

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Publication number
CN206972383U
CN206972383U CN201720947620.5U CN201720947620U CN206972383U CN 206972383 U CN206972383 U CN 206972383U CN 201720947620 U CN201720947620 U CN 201720947620U CN 206972383 U CN206972383 U CN 206972383U
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gas
turbine
natural gas
heated
heater
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CN201720947620.5U
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蔺雪莉
杨泓
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Northwest Electric Power Design Institute of China Power Engineering Consulting Group
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Northwest Electric Power Design Institute of China Power Engineering Consulting Group
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/16Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]

Abstract

A kind of heated by natural gas system for Combined cycle gas-steam turbine, including the gas turbine group being made up of gas turbine powered generator, gas turbine blower and gas turbine turbine, natural gas enters the acting of gas turbine turbine and generated electricity after being burnt in gas-turbine combustion chamber;Described gas-turbine combustion chamber is by performance heater connection natural gas pressure regulating station, the startup heater for being used for that dew point heating to be carried out to input natural gas is provided among natural gas pressure regulating station, the middle pressure economizer of described performance heater connection waste heat boiler, the delivery port of performance heater connect the condensate pump of Turbo-generator Set by pipeline.The utility model can make natural gas temperature enter gas-turbine combustion chamber after being lifted, and the middle pressure economizer of performance heater connection waste heat boiler, this causes the waste heat of middle pressure economizer to be fully used, and natural gas temperature gets a promotion, and effectively increases unit efficiency.

Description

A kind of heated by natural gas system for Gas-steam Combined Cycle
Technical field
It the utility model is related to heated by natural gas system, specially a kind of natural gas for Gas-steam Combined Cycle Heating system.
Background technology
Natural gas enters the air after compressor compresses by natural gas pressure regulating station and arrogant aspiration, with about 1:52 ratio Example premix, produce high temperature and high pressure flue gas subsequently into gas-turbine combustion chamber and promote combustion engine acting to generate electricity.Natural gas temperature conduct The performance of a pair of gas turbines of the characteristic of fuel has a certain impact.Natural gas by the separation of voltage regulating station, filtering, pressure regulation and Start heating, after meeting combustion engine requirement, burnt into gas-turbine combustion chamber.Gas turbine on startup, natural temperature Degree will meet requirement of the combustion engine to fuel.It is required that natural gas temperature is higher than the degree of superheat of 28 DEG C of hydrocarbon dew point in fuel, Nytron is avoided to liquefy.Starting heater can meet to require, so starting heater is also referred to as dew point heater.
Combustion engine is very wide to the use range of natural gas temperature, and basic demand will ensure the degree of superheat higher than 28 DEG C of dew point, open Dynamic heater can typically be heated to natural gas temperature 60 DEG C or so, the degree of superheat of 28 DEG C higher than dew-point temperature, fully meet combustion Requirement of the machine to natural gas.It is rare and expensive due to natural gas, the initial outlay cost increase of fuel, cause per kilowatt to make Valency is high, so seeking how effectively to improve unit performance, to compensate the loss that the high price of natural gas is brought, while can also carry High unit efficiency, turn into technically need improve the problem of, the raising of natural gas temperature can increase combustion engine entrance heat, from And natural gas gas consumption is reduced, reach raising unit output and put forward efficient purpose.
Utility model content
The purpose of this utility model is to be directed to above-mentioned the problems of the prior art, there is provided one kind is used for fuel gas-steam and joined The heated by natural gas system of circulation is closed, by being equipped with performance heater, effectively improves unit performance.
To achieve these goals, the technical solution adopted in the utility model is:
Including the gas turbine group being made up of gas turbine powered generator, gas turbine blower and gas turbine turbine, The air that natural gas and compressor come enters the acting of gas turbine turbine after gas-turbine combustion chamber burning and generated electricity;Described Gas-turbine combustion chamber is used for inputting day by performance heater connection natural gas pressure regulating station, central be provided with natural gas pressure regulating station Right gas carries out the startup heater of dew point heating, and described performance heater connects the middle pressure economizer of waste heat boiler, and performance adds The delivery port of hot device connects the condensate pipe of Turbo-generator Set by pipeline.
It is additionally provided among described natural gas pressure regulating station for being separated, being filtered, the unit of pressure regulation to input natural gas.
Pressed in the performance heater connection and be provided with out water regulating valve on the pipeline of economizer water outlet.
The described water regulating valve that goes out includes being arranged on performance heater outlet side.
The Turbo-generator Set is by turbine generator, steam turbine high-pressure cylinder, Steam Turbine Through IP Admission, turbine low pressure cylinder Composition;Turbine low pressure cylinder connects condenser, and condenser connects waste heat boiler and performance heater by condensate pump.
The feed temperature that described middle pressure economizer is passed through performance heater is 220 DEG C~230 DEG C.
The output natural gas temperature for starting heater is heated to 185 DEG C by described performance heater by 60 DEG C.
Described performance heater uses shell-and-tube heat exchanger, including housing and by some molecular tube banks of pipe.
Compared with prior art, the utility model has following beneficial effect:Gas turbine group initial start stage, by opening Dynamic heater carries out heating to natural gas and is allowed to be higher than more than 28 DEG C of dew-point temperature, when set grid-connection input combined-cycle operation and When the middle pressure economizer exit feed temperature of waste heat boiler is more than 50 DEG C, performance heater is put into, by performance heater to day Right gas is reheated, and due to the setting of performance heater, enters gas-turbine combustion chamber after natural gas temperature lifting, and performance Heater connects the middle pressure economizer of waste heat boiler, and the delivery port of performance heater connects the solidifying of Turbo-generator Set by pipeline Pipe is born water, this causes the waste heat of middle pressure economizer to be fully used, and without outside vapour source, reduces natural gas dosage, simultaneously Output is also add, reduces heat consumption, adds unit efficiency, solves that existing gas turbine group cost per kilowatt is high to ask Topic.
Further, the pipeline of economizer water outlet is pressed to be adjusted provided with water outlet in the connection of the utility model performance heater Valve, going out water regulating valve regulating water flow makes the natural gas temperature for being passed through gas-turbine combustion chamber reach 185 DEG C or so, meets combustion gas Turbine combustion requirement.
Brief description of the drawings
Fig. 1 overall structure diagrams of the present utility model;
In accompanying drawing:1- gas-turbine combustion chambers;2- performance heaters;3- starts heater;4- waste heat boilers;Press and save in 5- Coal device;6- condensers;7- condensate pumps;8- natural gas pressure regulatings station;9- goes out water regulating valve.
Embodiment
The utility model is described in further detail below in conjunction with the accompanying drawings.
Referring to Fig. 1, the utility model includes by gas turbine powered generator, gas turbine blower and combustion gas in structure The gas turbine group of turbine turbine composition, natural gas are done after being burnt in gas-turbine combustion chamber 1 into gas turbine turbine Work(generates electricity.Gas-turbine combustion chamber 1 connects natural gas pressure regulating station 8 by performance heater 2, is provided among natural gas pressure regulating station 8 For carrying out the startup heater 3 of dew point heating to input natural gas and for input natural gas to be separated, filters, adjusted The unit of pressure.Performance heater 2 connects the middle pressure economizer 5 of waste heat boiler 4, is provided with the water outlet lateral line of performance heater 2 Go out water regulating valve 9.The delivery port of performance heater 2 connects the condensate pump 7 of Turbo-generator Set by pipeline.Waste heat boiler 4 On be provided with main chimney and chimney bypass, chimney bypass connection gas turbine turbine.
Turbo-generator Set is by turbine generator, steam turbine high-pressure cylinder, Steam Turbine Through IP Admission, turbine low pressure cylinder group Into.Turbine low pressure cylinder connects condenser 6, and condenser 6 connects waste heat boiler 4 and performance heater 2 by condensate pump 7.
The feed temperature that middle pressure economizer 5 is passed through performance heater 2 is 220 DEG C~230 DEG C.Performance heater 2 can incite somebody to action The output natural gas temperature for starting heater 3 is heated to 185 DEG C by 60 DEG C.The natural gas external from factory passes through natural gas pressure regulating station Enter gas-turbine combustion chamber 1 and Combustion of Premixed after 8 separation, filtering, pressure regulation and heating.When unit starts to start, first By starting the heated natural gas of heater 3 so that natural gas temperature is higher than the degree of superheat of 28 DEG C of hydrocarbon dew point in fuel, Avoid nytron from liquefying, meet requirement of the gas turbine group to fuel.When set grid-connection puts into combined-cycle operation, and waste heat When the middle exit water temperature of pressure economizer 5 of boiler 4 is more than 50 DEG C, performance heater 2 is put into, 3 are approximately passed through in Combined Cycle Unit When individual hour reaches rated load, the outlet feed temperature of middle pressure economizer 5 reaches 220 DEG C.Performance heater 2 uses shell-and-tube Heat exchanger, shell-and-tube heat exchanger are made up of a housing and the tube bank comprising many pipes, pass through pipe between cold and hot fluid Wall is exchanged heat.Natural gas is flowed through from shell-side, and the middle pressure economizer 5 heating feedwater from waste heat boiler 4 is flowed through in pipe, hot and cold Fluid obtains abundant heat convection.After the heated natural gas of performance heater 2, outlet condensate enters by going out water regulating valve 9 Enter the condensate pipe after condensate pump 7, the function of going out water regulating valve 9 is to reach regulation natural gas temperature by adjusting feedwater flow Reach 185 DEG C or so, to meet the requirement of burning.The utility model makes feeding gas-turbine combustion chamber 1 using performance heater 2 Natural gas temperature reach 185 DEG C, add unit and integrally contribute, improve unit efficiency.
Particular embodiments described above, the purpose of this utility model, technical scheme and beneficial effect are entered The detailed description of one step, above content are only specific embodiment of the utility model, it is impossible to assert tool of the present utility model Body embodiment is only limitted to this, all within the spirit and principles of the utility model, some simple deduction or replace made, The scope of patent protection that the utility model is determined by submitted claims should be all considered as belonging to.

Claims (8)

  1. A kind of 1. heated by natural gas system for Gas-steam Combined Cycle, it is characterised in that:Including by gas turbine power generation The air that the gas turbine generator group of machine, gas turbine blower and gas turbine turbine composition, natural gas and compressor come Enter the acting of gas turbine turbine after burning in gas-turbine combustion chamber (1) to generate electricity;Described gas-turbine combustion chamber (1) Natural gas pressure regulating station (8) are connected by performance heater (2), is provided with and is used for inputting natural gas among natural gas pressure regulating station (8) Carry out the startup heater (3) of dew point heating, the middle pressure economizer of described performance heater (2) connection waste heat boiler (4) (5), the delivery port of performance heater (2) connects the condensate pipe of Turbo-generator Set by pipeline.
  2. 2. it is used for the heated by natural gas system of Gas-steam Combined Cycle according to claim 1, it is characterised in that:It is described Natural gas pressure regulating station (8) among be additionally provided with for input natural gas to be separated, filtered, the unit of pressure regulation.
  3. 3. it is used for the heated by natural gas system of Gas-steam Combined Cycle according to claim 1, it is characterised in that:It is described Pressed in performance heater (2) connection and be provided with out water regulating valve (9) on the pipeline of economizer (5) water outlet.
  4. 4. it is used for the heated by natural gas system of Gas-steam Combined Cycle according to claim 3, it is characterised in that:It is described The water regulating valve (9) that goes out be arranged on performance heater (2) outlet side.
  5. 5. it is used for the heated by natural gas system of Gas-steam Combined Cycle according to claim 1, it is characterised in that:It is described Turbo-generator Set is made up of turbine generator, steam turbine high-pressure cylinder, Steam Turbine Through IP Admission, turbine low pressure cylinder;Steam turbine Low pressure (LP) cylinder connection condenser (6), condenser (6) connect waste heat boiler (4) and performance heater (2) by condensate pump (7).
  6. 6. it is used for the heated by natural gas system of Gas-steam Combined Cycle according to claim 1, it is characterised in that:It is described Middle pressure economizer (5) be passed through performance heater (2) feed temperature be 220 DEG C~230 DEG C.
  7. 7. it is used for the heated by natural gas system of Gas-steam Combined Cycle according to claim 1 or 6, it is characterised in that:Institute The output natural gas temperature for starting heater (3) is heated to 185 DEG C by the performance heater (2) stated by 60 DEG C.
  8. 8. it is used for the heated by natural gas system of Gas-steam Combined Cycle according to claim 1, it is characterised in that:It is described Performance heater (2) use shell-and-tube heat exchanger, including housing and by some molecular tube banks of pipe.
CN201720947620.5U 2017-07-31 2017-07-31 A kind of heated by natural gas system for Combined cycle gas-steam turbine Active CN206972383U (en)

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Application Number Priority Date Filing Date Title
CN201720947620.5U CN206972383U (en) 2017-07-31 2017-07-31 A kind of heated by natural gas system for Combined cycle gas-steam turbine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201720947620.5U CN206972383U (en) 2017-07-31 2017-07-31 A kind of heated by natural gas system for Combined cycle gas-steam turbine

Publications (1)

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CN206972383U true CN206972383U (en) 2018-02-06

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111852660A (en) * 2020-06-16 2020-10-30 华电电力科学研究院有限公司 Gas turbine performance heating system and operation method thereof
WO2022063429A1 (en) * 2020-09-28 2022-03-31 Nuovo Pignone Tecnologie - S.R.L. Gas turbine fuel treatment circuit and method for starting up a gas turbine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111852660A (en) * 2020-06-16 2020-10-30 华电电力科学研究院有限公司 Gas turbine performance heating system and operation method thereof
WO2022063429A1 (en) * 2020-09-28 2022-03-31 Nuovo Pignone Tecnologie - S.R.L. Gas turbine fuel treatment circuit and method for starting up a gas turbine

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