CN103061886A - System and method for heating inlet air of gas turbine - Google Patents
System and method for heating inlet air of gas turbine Download PDFInfo
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- CN103061886A CN103061886A CN2012102620226A CN201210262022A CN103061886A CN 103061886 A CN103061886 A CN 103061886A CN 2012102620226 A CN2012102620226 A CN 2012102620226A CN 201210262022 A CN201210262022 A CN 201210262022A CN 103061886 A CN103061886 A CN 103061886A
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Abstract
The invention discloses a system and a method for heating inlet air of a gas turbine. The inlet air heating system is a closed circulating system comprising an inlet air heater (1), a circulating pump (2), a heat exchanger (3), pipelines and other accessories, wherein the inlet air heater (1) is used for heating the inlet air of the gas turbine, the heat exchanger (3) is used as a heat exchange equipment between antifreezing solution and heat source fluid (such as water, air or flue gas), and the circulating pump (2) is used for circulating the antifreezing solution in the system.
Description
Technical field
The invention provides a kind of gas turbine inlet air heating system and method, the thermal efficiency and Operation safety when being used for improving gas turbine and combined cycle thereof and under microthermal climate, moving.
Background technique
Some are installed in the gas turbine of northern area, winter cold wet weather condition under when moving, the frosting that the gas turbine inlet air system can occur the to some extent phenomenon of freezing causes the gas turbine inlet air system pressure difference to raise.When pressure reduction is too high, can make gas turbine be difficult to continue operation.And winter cold wet weather gas compressor entrance position (for example import adjustable vane) is frozen, ice cube comes off when freezing to certain thickness, can damage compressor blade, causes the accident.
For Gas Turbine Combined-cycle, combined cycle generation efficient and ambient temperature have substantial connection.The most effective zone of combined cycle generation generally between 10 ℃～20 ℃, is installed in the Gas Turbine Combined-cycle of north of china in winter cold area, and can make combined cycle generation decrease in efficiency when moving under the cold snap winter.
For the gas turbine with the low nitrogen burning system, in order to enlarge low nitrogen burning system premixed combustion operating range, the combustion machine is equipped with inlet air heating system (IBH), and this system is by extracting the exhaust of part gas compressor out, be transmitted back to compressor inlet, realize compressor air inlet machine is heated.Certainly, this inlet air heating system prevents the effect that compressor inlet freezes and the restriction compressor pressure ratio transfinites in addition in the winter time.The inlet air heating system (IBH) that this employing gas compressor is bled increases power input to compressor, has reduced the generating efficiency of combustion machine.What of Efficiency Decreasing are relevant with the aperture of the heat control valve of bleeding, and aperture is larger, Efficiency Decreasing more.In general be ambient temperature open low the time large, open when ambient temperature is high little or close.Therefore, for the combustion machine that is installed in the cold area in winter, obviously reduce with the bleed generating efficiency of gas turbine of heating of gas compressor during operation at part load.
There is following problems in patent of invention " air inlet temperature regulating device for air pressing unit of gas-fired " (patent No. ZL 200520033435.2):
Water is as the heat transferring medium of inlet air heating system, and Main Problems is: in the gas turbine operation process, when regulating temperature behind the air intake heater by regulating water-quantity, if the water yield is inadequate; Perhaps after the water inlet of air intake heater was cut off, the water meeting bursting by freezing air intake heater in the air intake heater made device damage.
Summary of the invention
The technical problem to be solved in the present invention is: the system of the compressor inlet air of design one cover water heating gas turbine solves air intake heater easily by the problem of bursting by freezing.
As shown in Figure 1, the inlet air heating system comprises air intake heater, recycle pump, heat exchanger etc., consists of a circulatory system with antifreeze liquid as heat transferring medium.In this circulatory system, air intake heater is used for heating gas turbine inlet air, and heat exchanger is as the heat-exchange apparatus between antifreeze liquid and the thermal source (for example water, air or flue gas).The thermal source of inlet air heating system can adopt the very low water of hot grade or air as thermal source (such as out circulating water of turbine condenser in the Gas Turbine Combined-cycle, flue gas of exhaust heat boiler afterbody etc.).
The inlet air heating system as heat transferring medium, has therefore solved air intake heater easily by the problem of bursting by freezing with antifreeze liquid.
The invention has the beneficial effects as follows and solved: for the Gas Turbine Combined-cycle that is installed in the north of china in winter cold area, during the compressor inlet air of water or steam heated gas turbine, air intake heater is easily by the problem of bursting by freezing.
Description of drawings
Fig. 1 is gas turbine inlet air heating system schematic representation of the present invention.
Fig. 2 is the system diagram of embodiment 1 of the present invention.
Fig. 3 is the system diagram of embodiment 2 of the present invention.
The number in the figure explanation:
The 1-air intake heater, 2-recycle pump, 3-heat exchanger, 4-spray-type heat exchanger, 5-modulating valve, 6-elevated tank, 7-flue gas heat-exchange unit
Embodiment
As shown in Figure 1, the inlet air heating system is comprised of air intake heater 1, recycle pump 2, spray-type heat exchanger 4, modulating valve 5, elevated tank 6 and valve and pipeline etc., consists of a circulatory system with antifreeze liquid as heat transferring medium.In this circulatory system, air intake heater 1 is used for heating gas turbine inlet air, and spray-type heat exchanger 4 is as the heat exchanger between antifreeze liquid and the heat source water, and the effect of recycle pump 2 is exactly that antifreeze liquid is circulated in system.The thermal source of inlet air heating system can adopt the very low water of hot grade as thermal source (for example turbine condenser circulating water out in the Gas Turbine Combined-cycle).
Antifreeze liquid and adopt spray-type heat exchanger as the heat exchanger between the water of thermal source, problem that (this moment, the antifreeze liquid temperature equaled the temperature of ambient atmosphere) heat exchanger water side is frozen in the time of can solving antifreeze liquid temperature in the running and be lower than 0 ℃ or inlet air heating system and stop transport.
In combustion machine air intake filter upstream air intake heater is set, fills antifreeze liquid in the system.The heat medium of spray-type heat exchanger is that heated medium is exactly antifreeze liquid from turbine condenser circulating water out.Antifreeze liquid is heated in spray-type heat exchanger, through behind the recycle pump to air intake heater, with the cool air heating, self temperature reduces, and arrive spray-type heat exchanger heat exchange intensification again.Spray above spray-type heat exchanger from turbine condenser circulating water out, fall in the collecting annulus of bottom after the heat exchange cooling, flow back at last the circulating water channel.
Only need to open the coagulator water outlet when heating system puts into operation, start recycle pump and get final product, system stops recycle pump when stopping transport, disconnect the coagulator water outlet.Regulate the temperature behind the air intake heater, only need the aperture of regulating and controlling valve 4.The operation adjusting of inlet air heating system and throwing are moved back all very convenient.
As shown in Figure 2, the inlet air heating system is comprised of air intake heater 1, recycle pump 2, flue gas heat-exchange unit 7, elevated tank 6 and valve and pipeline etc., consists of a circulatory system with antifreeze liquid as heat transferring medium.In this circulatory system, air intake heater 1 is used for heating gas turbine inlet air, and flue gas heat-exchange unit 7 is contained in the exhaust heat boiler afterbody of Gas Turbine Combined-cycle to absorb fume afterheat, and the effect of recycle pump 2 is exactly that antifreeze liquid is circulated in system.
In combustion machine air intake filter upstream air intake heater is set, fills antifreeze liquid in the system.Antifreeze liquid is heated in flue gas heat-exchange unit, through behind the recycle pump to air intake heater, with the cool air heating, self temperature reduces, and arrive flue gas heat-exchange unit heat exchange intensification again.
Claims (4)
1. gas turbine inlet air heating system, comprise the heat-exchange medium that fills in air intake heater (1), recycle pump (2), heat exchanger (3) and the inlet air heating system, it is characterized in that the heat-exchange medium that fills in the inlet air heating system is antifreeze liquid.
2. a kind of gas turbine inlet air heating system according to claim 1 is characterized in that, described heat exchanger (3) adopts spray-type heat exchanger.
3. the method for a kind of heating gas turbine according to claim 1 air inlet, it is characterized in that, described air intake heater (1), recycle pump (2), heat exchanger (3) and pipeline and other annex consist of a closed circulation system, air intake heater (1) is used for the inlet air of heating gas turbine, heat exchanger (3) is as the heat-exchange apparatus between antifreeze liquid and the heat source fluid (for example water, air or flue gas), and the effect of recycle pump (2) is that antifreeze liquid is circulated in system.
4. the method for a kind of heating gas turbine according to claim 2 air inlet, it is characterized in that, described air intake heater (1), recycle pump (2), spray-type heat exchanger (4) and pipeline and other annex consist of a closed circulation system, air intake heater (1) is used for the inlet air of heating gas turbine, spray-type heat exchanger (4) is as the heat-exchange apparatus between antifreeze liquid and the heat source water, and the effect of recycle pump (2) is that antifreeze liquid is circulated in system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102620226A CN103061886A (en) | 2012-07-24 | 2012-07-24 | System and method for heating inlet air of gas turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102620226A CN103061886A (en) | 2012-07-24 | 2012-07-24 | System and method for heating inlet air of gas turbine |
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| Publication Number | Publication Date |
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| CN103061886A true CN103061886A (en) | 2013-04-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102620226A Pending CN103061886A (en) | 2012-07-24 | 2012-07-24 | System and method for heating inlet air of gas turbine |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0378003A1 (en) * | 1989-01-11 | 1990-07-18 | STEWART & STEVENSON SERVICES, INC. | Apparatus and method for optimizing the air inlet temperature of gas turbines |
| CN2400764Y (en) * | 1999-12-30 | 2000-10-11 | 张晓军 | Anti-freezing device for air conditioner |
| CN102449288A (en) * | 2009-05-28 | 2012-05-09 | 西门子公司 | Intake air temperature control device and a method for operating an intake air temperature control device |
-
2012
- 2012-07-24 CN CN2012102620226A patent/CN103061886A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0378003A1 (en) * | 1989-01-11 | 1990-07-18 | STEWART & STEVENSON SERVICES, INC. | Apparatus and method for optimizing the air inlet temperature of gas turbines |
| CN2400764Y (en) * | 1999-12-30 | 2000-10-11 | 张晓军 | Anti-freezing device for air conditioner |
| CN102449288A (en) * | 2009-05-28 | 2012-05-09 | 西门子公司 | Intake air temperature control device and a method for operating an intake air temperature control device |
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Application publication date: 20130424 |