CN103047011A - System and method for heating inlet gas of gas turbine - Google Patents
System and method for heating inlet gas of gas turbine Download PDFInfo
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- CN103047011A CN103047011A CN2012100218144A CN201210021814A CN103047011A CN 103047011 A CN103047011 A CN 103047011A CN 2012100218144 A CN2012100218144 A CN 2012100218144A CN 201210021814 A CN201210021814 A CN 201210021814A CN 103047011 A CN103047011 A CN 103047011A
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Abstract
The invention relates to a system and a method for heating inlet gas of a gas turbine; the system comprises an inlet gas heater (1) and a gas inlet system (3) of the gas turbine, wherein the heating medium of the inlet gas heater (1) is water or water vapor; and the system is characterized in that a gas inlet bypass door (2) and an opening control device (4) of the gas inlet bypass door are arranged between the inlet gas heater (1) and the gas inlet system (3) of the gas turbine. The system and the method provided by the invention improve the thermal efficiency and the running safety and reliability when the gas turbine and the combined cycle of the gas turbine run in the weather with low temperature.
Description
Technical field
The invention provides the system and method for a kind of heating gas turbine air inlet, the thermal efficiency when being used for improving gas turbine and combined cycle thereof and under microthermal climate, moving and the safety reliability of operation.
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 utility model patent " air inlet temperature regulating device for air pressing unit of gas-fired " (patent No. ZL 200520033435.2):
Water or steam are as the external heat source of inlet air heating, and Main Problems is: the one, there is not the air inlet bypass door, and be not easy to the adjusting of gas turbine and the protection of air intake heater; The 2nd, during winter operation, after the water inlet of air intake heater was cut off, the water meeting bursting by freezing air intake heater in heater pipe and the hydroecium made device damage; The 3rd, when regulating temperature behind the air intake heater by regulating water-quantity, if the water yield is inadequate, understand equally the bursting by freezing air intake heater.
Summary of the invention
The technical problem to be solved in the present invention one is, the system and method for design one cover water or steam heating gas turbine inlet air, air intake heater is in the situation that structure and install and can guarantee to cut off the water supply in the winter time or the water flow deficiency, can bleed off timely the water in the heater, prevent the water freezing bursting by freezing heater in the heater; The 2nd, guarantee that the air temperature field pattern behind the inlet air heating is even.
In gas turbine inlet air system upstream air intake heater is set, when ambient temperature is low, comes the air inlet of heating gas turbine with cooling water water outlet or other thermals source of turbine condenser.Establish one between air intake heater and the gas turbine inlet air system with the space of warming plate sealing, the air inlet bypass door is set on this enclosed space.
Air intake heater must be considered two aspects: the one, and winter is in the situation that cut off the water supply or the circulating water flow quantity not sufficient, when perhaps special circumstances need to withdraw from the heater operation, if can not bleed off timely the water in the heater, can make the water freezing bursting by freezing heater in the heater.For preventing from particular cases damaging heater, air intake heater adopts vertical installation, can bleed off very soon the water of heater (comprising pipe) the inside when needing.The structure of air intake heater satisfies: after water inlet was cut off, the water in heater pipe and the hydroecium can be drained under Action of Gravity Field; The influent side of air intake heater and backwater side pipe line are equipped with the cut-off valve (if the backwater side is directly to enter water channel, can not fill cut-off valve) of automatic control, the self-draining arrangement after the influent side of air intake heater and backwater side are equipped with and cut off into water; On the backwater side pipe line of air intake heater thermal switch is installed also, its setting value X1 is than the slightly high several years of freezing point (for example 2 degrees centigrade) of water, when the return water temperature of air intake heater arrives setting value, the thermal switch action, signal passes to cut-off valve and self-draining arrangement, cut off backwater, self-draining arrangement is opened.The 2nd, guarantee that the air temperature field pattern behind the inlet air heating is even, the water side of air intake heater can be the single process structure, but air intake heater two arrange and put before and after adopting at least, the flow direction of a draining up, the flow direction of another draining is down; Or the water side of air intake heater is the double-flow structure at least, a flow process upwards, the another one flow process is downward.
Establish one between air intake heater and the gas turbine inlet air system with the space of warming plate sealing, the air inlet bypass door is set on this enclosed space.The aperture of air inlet bypass door can adopt automatic control, and as control signal, the size of the aperture by the air inlet bypass door is regulated the air temperature that finally enters gas turbine with the air temperature signal in air intake heater downstream or other appropriate signals.The target temperature of regulating can be set between 10 ℃～20 ℃ in the most effective zone of combined cycle generation (each unit is not quite alike certainly).On the backwater side pipe line of air intake heater thermal switch is installed also, its setting value X2 is than slightly high several years of X1 (for example 5 degrees centigrade), when the return water temperature of air intake heater arrives setting value, the thermal switch action, signal passes to the control apparatus of air inlet bypass door, the full admission bypass door makes the air quantity that flows through air intake heater very little, prevents the water freezing in the air intake heater.Certainly the air inlet bypass door also is the gas-entered passageway in summer, to reduce intake resistance.
The size that the invention has the beneficial effects as follows the aperture by the air inlet bypass door is regulated the air temperature that finally enters gas turbine, is convenient to gas turbine and regulates; Air intake heater cut off the water supply in the winter time or the situation of water flow deficiency under, can bleed off timely the water in the heater, prevent the water freezing bursting by freezing heater in the heater; Air temperature field pattern behind the inlet air heating is even.
Description of drawings
Fig. 1 is the system diagram of embodiment 1 of the present invention.
Fig. 2 is the A-A view of Fig. 1.
Fig. 3 is the system diagram of embodiment 2 of the present invention.
Fig. 4 is the system diagram of embodiment 3 of the present invention.
The number in the figure explanation:
The 1-air intake heater, 2-air inlet bypass door, 3-gas turbine inlet air system, 4-aperture control apparatus, 5-L type three-way valve, 6-L type three-way valve, 7-automatic air release valve.
Embodiment
Embodiment 1:
As shown in Figure 1, in combustion machine air intake filter upstream air intake heater 1 is set, establishes one between air intake heater 1 and the gas turbine inlet air system 3 with the space of warming plate sealing, air inlet bypass door 2 is set on this enclosed space.
Air intake heater 1 adopts vertical installation, and the water side of air intake heater 1 is the double-flow structure, and a flow process makes progress, and the another one flow process is downward.The water intake of air intake heater 1 and water outlet are all at the bottom hydroecium.Traditional thread binding electronic (perhaps electromagnetism, pneumatic) the L-type three-way valve 6 of air intake heater 1 intake pipe, heater water inlet when the A-C end is communicated with, the B-C end cuts off water inlet when being communicated with, and heater influent side and the external world communicate, and bleed off the water in the heater.Traditional thread binding electronic (perhaps electromagnetism, pneumatic) the L-type three-way valve 5 of air intake heater 1 return pipe, heater water inlet when the A-C end is communicated with, the B-C end cuts off water inlet when being communicated with, and heater backwater side and the external world communicate, and bleed off the water in the heater.Heater top hydroecium fills an automatic air release valve 7, and the double suction valve of doing: in the situation that hydroecium does not have hydraulic pressure automatically to open, ambient air enters, and is conducive to discharge fast the water in the heater.On the backwater side pipe line of air intake heater 1 thermal switch is installed also, its setting value X1 is than the slightly high several years of freezing point (for example 2 degrees centigrade) of water, when the return water temperature of air intake heater arrives setting value, the thermal switch action, signal passes to three-way valve 6 and three-way valve 5, cut off backwater, bleed off the water in the heater.Three-way valve 6 and three-way valve 5 also can adopt manual control mode, and cut off advance backwater in the time of need to withdrawing from air intake heater 1 operation in special circumstances winter, bleeds off the water in the heater.
Air inlet bypass door 2 has aperture control apparatus 4, and as control signal, the size of the aperture by air inlet bypass door 2 is regulated the air temperature that enters gas turbine inlet air system 3 with the air temperature signal that enters gas turbine inlet air system 3.On the backwater side pipe line of air intake heater thermal switch is installed also, its setting value X2 is than slightly high several years of X1 (for example 5 degrees centigrade), when the return water temperature of air intake heater arrives setting value, the thermal switch action, signal passes to the aperture control apparatus 4 of air inlet bypass door, full admission bypass door 2 makes the air quantity that flows through air intake heater 1 very little, prevents the water freezing in the air intake heater.
Embodiment 2:
As shown in Figure 3, and the difference of embodiment 1 is traditional thread binding electronic (perhaps electromagnetism, pneumatic) the L-type three-way valve 6 of air intake heater 1 intake pipe, and air intake heater 1 backwater directly enters water channel, and return piping does not fill valve.The B end of L-type three-way valve 6 is connected with return piping.Heater water inlet when the A-C end is communicated with; The B-C end cuts off water inlet when being communicated with, and heater influent side and backwater side communicate, and bleeds off the water in the heater.
Embodiment 3:
As shown in Figure 4, and the difference of embodiment 1 is that the water side of air intake heater 1 is single process, and 2 arrange and put before and after adopting.Traditional thread binding electronic (perhaps electromagnetism, pneumatic) the L-type three-way valve 6 of the intake pipe of air intake heater 1, the backwater of air intake heater 1 directly enters water channel, and return piping does not fill valve.The B of L-type three-way valve 6 holds and communicates with the external world.Heater water inlet when the A-C end is communicated with; Cut off water inlet when B-C end is communicated with, the heater influent side and and the external world communicate, bleed off the water in the heater.
Claims (9)
1. the system of heating gas turbine air inlet, comprise air intake heater (1), gas turbine inlet air system (3), the heat medium of air intake heater (1) is water or water vapor, it is characterized in that being equipped with between air intake heater (1) and the gas turbine inlet air system (3) air inlet bypass door (2) and aperture control apparatus (4) thereof.
2. the system of a kind of heating gas turbine according to claim 1 air inlet, it is characterized in that, described air intake heater (1) adopts vertical installation, the structure of air intake heater (1) satisfies: after water inlet was cut off, the water in the heat exchanging tube of air intake heater (1) and the hydroecium can be drained under Action of Gravity Field; The influent side of air intake heater (1) and backwater side have the drainage means after cutting off into water.
3. the system of a kind of heating gas turbine according to claim 2 air inlet is characterized in that, the water side of described air intake heater (1) is the double-flow structure at least, and a flow process makes progress, and the another one flow process is downward; Or the water side of air intake heater (1) can be the single process structure, but air intake heater (1) two arrange and put before and after adopting at least, the flow direction of a draining up, the flow direction of another draining is down.
4. the method for a kind of heating gas turbine according to claim 1 air inlet, it is characterized in that, the aperture control apparatus (4) of described air inlet bypass door (2), as control signal, the size of the aperture by air inlet bypass door (2) is regulated the air temperature that enters gas turbine inlet air system (3) with the air temperature signal that enters gas turbine inlet air system (3).
5. the method for a kind of heating gas turbine according to claim 2 air inlet, it is characterized in that, the aperture control apparatus (4) of described air inlet bypass door (2), as control signal, the size of the aperture by air inlet bypass door (2) is regulated the air temperature that enters gas turbine inlet air system (3) with the air temperature signal that enters gas turbine inlet air system (3).
6. the method for a kind of heating gas turbine according to claim 3 air inlet, it is characterized in that, the aperture control apparatus (4) of described air inlet bypass door (2), as control signal, the size of the aperture by air inlet bypass door (2) is regulated the air temperature that enters gas turbine inlet air system (3) with the air temperature signal that enters gas turbine inlet air system (3).
7. the method for a kind of heating gas turbine according to claim 1 air inlet; it is characterized in that; the aperture control apparatus (4) of described air inlet bypass door (2); with the water-exit temperature of air intake heater (1) protective signal as air intake heater; when water-exit temperature arrives setting value X2, full admission bypass door (2).
8. the method for a kind of heating gas turbine according to claim 2 air inlet; it is characterized in that; the aperture control apparatus (4) of described air inlet bypass door (2); with the water-exit temperature of air intake heater (1) protective signal as air intake heater; when water-exit temperature arrives setting value X2, full admission bypass door (2).
9. the method for a kind of heating gas turbine according to claim 3 air inlet; it is characterized in that; the aperture control apparatus (4) of described air inlet bypass door (2); with the water-exit temperature of air intake heater (1) protective signal as air intake heater; when water-exit temperature arrives setting value X2, full admission bypass door (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100218144A CN103047011A (en) | 2012-01-14 | 2012-01-14 | System and method for heating inlet gas of gas turbine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100218144A CN103047011A (en) | 2012-01-14 | 2012-01-14 | System and method for heating inlet gas of gas turbine |
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| CN103047011A true CN103047011A (en) | 2013-04-17 |
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| CN2012100218144A Pending CN103047011A (en) | 2012-01-14 | 2012-01-14 | System and method for heating inlet gas of gas turbine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108444313A (en) * | 2018-04-30 | 2018-08-24 | 郑丽 | A kind of combustion engine compressor and air blower inlet deicing, defrosting and dehumidification device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1162063A (en) * | 1995-12-28 | 1997-10-15 | 株式会社日立制作所 | Gas turbine, combined circulation device and air compressor |
| GB2449181B (en) * | 2007-05-10 | 2009-04-01 | Alstom Technology Ltd | Solar hybrid power plant |
| CN101749116A (en) * | 2008-12-11 | 2010-06-23 | 通用电气公司 | The low-grade heat recovery system that is used for air inlet of turbine |
| CN202417716U (en) * | 2012-01-11 | 2012-09-05 | 陈大兵 | Inlet air heating system for gas turbine |
-
2012
- 2012-01-14 CN CN2012100218144A patent/CN103047011A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1162063A (en) * | 1995-12-28 | 1997-10-15 | 株式会社日立制作所 | Gas turbine, combined circulation device and air compressor |
| GB2449181B (en) * | 2007-05-10 | 2009-04-01 | Alstom Technology Ltd | Solar hybrid power plant |
| CN101749116A (en) * | 2008-12-11 | 2010-06-23 | 通用电气公司 | The low-grade heat recovery system that is used for air inlet of turbine |
| CN202417716U (en) * | 2012-01-11 | 2012-09-05 | 陈大兵 | Inlet air heating system for gas turbine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108444313A (en) * | 2018-04-30 | 2018-08-24 | 郑丽 | A kind of combustion engine compressor and air blower inlet deicing, defrosting and dehumidification device |
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Application publication date: 20130417 |