CN205445803U - Gas steam combination system - Google Patents
Gas steam combination system Download PDFInfo
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- CN205445803U CN205445803U CN201521144201.5U CN201521144201U CN205445803U CN 205445803 U CN205445803 U CN 205445803U CN 201521144201 U CN201521144201 U CN 201521144201U CN 205445803 U CN205445803 U CN 205445803U
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Abstract
The utility model relates to a gas steam combination system, include: gas turbine, steam circuit, last exhaust -heat boiler, steam turbine and the condenser of being equipped with of steam circuit, the last steam extraction port that is equipped with of steam turbine, absorption heat pump, absorption heat pump has the first heat transfer passageway of matched with, second heat transfer passageway and driving heat source passageway, preheating heat exchanger, preheating heat exchanger has matched with third heat transfer passageway and fourth heat transfer passageway, partial vapor among the steam turbine is done all can as absorption heat pump's drive in steam extraction port gets into the driving heat source passageway, makes the cycle fluid heaied up in second heat transfer passageway to the cooling water is cooled down in first heat transfer passageway, cycle fluid after the intensification heats the air or the fuel of the fourth heat transfer passageway of flowing through, makes the air or the fuel temperature that get into gas turbine rise.
Description
Technical field
This utility model belongs to energy field, is specifically related to a kind of combustion and steam association system.
Background technology
The operating condition of combustion and steam association system adjusts in real time according to its load condition, and due to the change of load, combustion and steam association system tends not to generate electricity at full capacity, and during underload, combustion and steam association system is relatively inefficient.
Raising steam cycle efficiency main path is to increase the steam inlet condition of steam turbine thus improves the mechanical efficiency of steam turbine at present, but, select higher pressure and the steam turbine of higher temperature and waste heat boiler, increase considerably power plant's initial cost, payoff period is longer, either new-built unit or old Transformation of Unit, is all unfavorable for promoting.
Summary of the invention
Based on this, this utility model is to overcome the defect of prior art, it is provided that a kind of combustion and steam association system, and the thermal efficiency is high, and equipment manufacturing cost is low.
Its technical scheme is as follows:
A kind of combustion and steam association system, including: gas turbine；Steam circuit, described steam circuit is provided with waste heat boiler, steam turbine and condenser, and described steam turbine is provided with extraction opening, and described waste heat boiler is provided with pump mouth；Absorption heat pump, described absorption heat pump has the first heat exchanger channels, the second heat exchanger channels and the driving heat source passage matched；Preheating heat exchanger, described preheating heat exchanger has the 3rd heat exchanger channels and the 4th heat exchanger channels matched；Fuel heater, described fuel heater has the 5th heat exchanger channels and the 6th heat exchanger channels matched；Wherein, the import of described driving heat source passage is docked with described extraction opening, and the outlet of described driving heat source passage is docked with the steam inlet of described condenser；The import of described first heat exchanger channels is docked with the cooling water outlet of described condenser, and the outlet of described first heat exchanger channels is docked with low-temperature receiver or cooling tower；The import of described second heat exchanger channels is docked with the outlet of described 3rd heat exchanger channels, and the outlet of described second heat exchanger channels is docked with the import of described 3rd heat exchanger channels；The import of described 4th heat exchanger channels is docked with air source or fuels sources, and the outlet of described 4th heat exchanger channels is docked with air intlet or the fuel inlet of described gas turbine；It is provided with flow control valve between the import of the 5th heat exchanger channels；Or, between the feed-water inlet being exported to described waste heat boiler of described 5th heat exchanger channels, it is provided with flow control valve.
Wherein in an embodiment, between outlet and the import of described 3rd heat exchanger channels of described second heat exchanger channels, it is provided with flow control valve；Or, between import and the outlet of described 3rd heat exchanger channels of described second heat exchanger channels, it is provided with flow control valve.
Wherein in an embodiment, the air intlet of described gas turbine is provided with temperature sensor；Or/and, the fuel inlet of described gas turbine is provided with temperature sensor.
Wherein in an embodiment, the import also including described 5th heat exchanger channels is docked with described pump mouth, the outlet of described 5th heat exchanger channels is docked with the feed-water inlet of described waste heat boiler, the import of described 6th heat exchanger channels is docked with the outlet of described 4th heat exchanger channels, and the outlet of described 6th heat exchanger channels is docked with the fuel inlet of described gas turbine.
Wherein in an embodiment, the fuel temperature of the outlet of described 6th heat exchanger channels is 175 DEG C to 185 DEG C.
Wherein in an embodiment, the fuel gas temperature of the outlet of described 4th heat exchanger channels or air themperature are 100 DEG C to 120 DEG C.
Wherein in an embodiment, the cooling water temperature of the outlet of described first heat exchanger channels is 25 DEG C to 35 DEG C.
A kind of combustion and steam association system progress control method, including: fuel and air enter work by combustion in gas turbine, flue gas after acting enters in waste heat boiler, feedwater to waste heat boiler is heated, feedwater is heated to be steam and enters steam turbine acting, and the steam after acting is cooled to feedwater through condenser and is back to waste heat boiler；The cooling water of condenser enters the first heat exchanger channels, cycle fluid circulates in the second heat exchanger channels, the 3rd heat exchanger channels, part steam in steam turbine enters in driving heat source passage the driving force as absorption heat pump from extraction opening, make cycle fluid be warmed in the second heat exchanger channels, and cool down water and lower the temperature in the first heat exchanger channels；Cycle fluid heating after intensification flows through air or the fuel of the 4th heat exchanger channels, makes the air of entrance gas turbine or fuel temperature raise.
Wherein in an embodiment, according to the temperature of air or the temperature of fuel at fuel inlet at the gas turbine air intlet that temperature sensor detects, regulation flow control valve, the flow of control cycle fluid in the second heat exchanger channels and the 3rd heat exchanger channels, thus control to enter fuel or the temperature of air of gas turbine.
The beneficial effects of the utility model are:
Part steam in steam turbine enters in driving heat source passage the driving force as absorption heat pump from extraction opening, makes cycle fluid be warmed in the second heat exchanger channels, and cools down water and lower the temperature in the first heat exchanger channels；Cycle fluid heating after intensification flows through air or the fuel of the 4th heat exchanger channels, makes the air of entrance gas turbine or fuel temperature raise.Air and fuel after intensification enter gas turbine combustion acting, air and fuel combustion after intensification are more stable, and the delivery temperature of gas turbine is higher, now increase the feedwater flow of steam circuit, make it obtain bigger quantity of steam with the flue gas heat exchange of the higher temperature of discharge of gas turbine, make the steam of greater flow enter steam turbine acting.Steam now maintains original steam pressure and temperature substantially to wait steam operational factor constant, and these more steam enters steam turbine acting and obtains bigger exerting oneself, and improves the efficiency of whole combustion and steam association system.
The cooling water of condenser discharges after being lowered the temperature, and reduces temperature at discharging condensate, utilizes the low-grade energy of cooling water, improves the thermal efficiency of combustion and steam circulation, and low warm water discharge is friendly to environmental ecology, reduces the impact on environment.
On the other hand, circulate in the second heat exchanger channels and the 3rd heat exchanger channels from steam turbine extraction part steam, cycle fluid, without changing the steam operational factor of steam circuit, need not use the more preferable material of heat resisting and pressure resisting, while improving the thermal efficiency, avoid being greatly improved the cost of whole system.
Accompanying drawing explanation
Fig. 1 is the structural representation of the combustion and steam association system of this utility model embodiment one.
Description of reference numerals:
100, gas turbine, 210, waste heat boiler, 220, steam turbine, 230, condenser, 300, absorption heat pump, 310, preheating heat exchanger, 320, flow control valve, 330, warm-up cycle pump, 410, fuel heater, 420, flow control valve, 500, cooling tower.
Detailed description of the invention
Below this utility model is described in further detail, but embodiment of the present utility model is not limited to this.
As it is shown in figure 1, combustion and steam association system, including: gas turbine 100, steam circuit, absorption heat pump 300 and preheating heat exchanger 310.Wherein, steam circuit is provided with waste heat boiler 210, steam turbine 220 and condenser 230, and steam turbine 220 is provided with extraction opening；Absorption heat pump 300 has the first heat exchanger channels, the second heat exchanger channels and the driving heat source passage matched；Preheating heat exchanger 310 has the 3rd heat exchanger channels and the 4th heat exchanger channels matched；The import of driving heat source passage is docked with extraction opening, and the outlet of driving heat source passage is docked with the steam inlet of condenser 230；The import of the first heat exchanger channels is docked with the cooling water outlet of condenser 230, and the outlet of the first heat exchanger channels is docked with low-temperature receiver or cooling tower 500；The import of the second heat exchanger channels is docked with the outlet of the 3rd heat exchanger channels, and the outlet of the second heat exchanger channels is docked with the import of the 3rd heat exchanger channels；It is provided with between import and the outlet of described 3rd heat exchanger channels of described second heat exchanger channels between described warm-up cycle pump 330, or outlet and the import of described 3rd heat exchanger channels of described second heat exchanger channels and is provided with described warm-up cycle pump 330；The import of the 4th heat exchanger channels is docked with air source or fuels sources, and the outlet of the 4th heat exchanger channels is docked with air intlet or the fuel inlet of gas turbine 100.
Part steam in steam turbine 220 enters in driving heat source passage the driving force as absorption heat pump 300 from extraction opening, makes cycle fluid be warmed in the second heat exchanger channels, and cools down water and lower the temperature in the first heat exchanger channels；Cycle fluid heating after intensification flows through air or the fuel of the 4th heat exchanger channels, makes the air of entrance gas turbine 100 or fuel temperature raise.Air and fuel after intensification enter gas turbine 100 work by combustion, air and fuel combustion after intensification are more stable, and the delivery temperature of gas turbine 100 is higher, now increase the feedwater flow of steam circuit, make it obtain bigger quantity of steam with the flue gas heat exchange of the higher temperature of gas turbine 100 discharge, make the steam of greater flow enter steam turbine 220 and do work.Steam now maintains original steam pressure and temperature substantially to wait steam operational factor constant, and these more steam enters steam turbine 220 acting and obtains bigger exerting oneself, and improves the efficiency of whole combustion and steam association system.The cooling water of condenser 230 discharges after being lowered the temperature, and reduces temperature at discharging condensate, utilizes the low-grade energy of cooling water, improves the thermal efficiency of combustion and steam circulation, and low warm water discharge is friendly to environmental ecology, reduces the impact on ambient temperature.By absorption heat pump 300, it is possible to use the low grade heat energy of the cooling water of condenser 230 discharge, the thermal efficiency is greatly improved.On the other hand, circulate in the second heat exchanger channels and the 3rd heat exchanger channels from steam engine extraction part steam, cycle fluid, without changing the steam operational factor of steam circuit, need not use the more preferable material of heat resisting and pressure resisting, while improving the thermal efficiency, avoid being greatly improved the cost of whole system.
It is provided with flow control valve 320 between outlet and the import of the 3rd heat exchanger channels of the second heat exchanger channels.It is not limited to the present embodiment, it is also possible to be, between import and the outlet of the 3rd heat exchanger channels of the second heat exchanger channels, is provided with flow control valve 320.The flow of cycle fluid in the second heat exchanger channels and the 3rd heat exchanger channels can be regulated by regulation flow control valve 320, thus regulate the heat that fuel or air obtain in preheating heat exchanger 310, and then control to enter fuel temperature or the air themperature of gas turbine 100.
The air intlet of gas turbine 100 is provided with temperature sensor, or the fuel inlet of gas turbine 100 is provided with temperature sensor.The fuel gas temperature of the outlet of the 4th heat exchanger channels or air themperature are 100 DEG C to 120 DEG C.The cooling water temperature of the outlet of the first heat exchanger channels is 25 DEG C to 35 DEG C.Combustion and steam association system also has controller, the air intlet or the temperature sensor of fuel inlet, the flow control valve 320 that are arranged at gas turbine 100 are all electrically connected with controller, the fuel temperature of the entrance gas turbine 100 that controller detects according to temperature sensor or air themperature, regulation flow control valve 320, control the flow of cycle fluid in the second heat exchanger channels and the 3rd heat exchanger channels, thus control to enter the fuel temperature in gas turbine 100 or air themperature.
The fuel temperature or the air themperature that enter gas turbine 100 are affected by ambient temperature, change with the change of ambient temperature, the fuel temperature of gas turbine 100 or air themperature will be entered as control signal: when temperature sensor detects gas turbine 100 air themperature or fuel temperature more than setting value, controller controls flow control valve 320 and reduces the flow of cycle fluid in the second heat exchanger channels and the 3rd heat exchanger channels, i.e. minimizing and air or combustion gas carries out the cycle fluid flow of heat exchange, the heat making fuel or air obtain reduces, thus reduce fuel or the temperature of air entrance gas turbine 100；Otherwise, when the air themperature that temperature sensor detects or fuel temperature are less than setting value, controller controls flow control valve 320 and increases the flow of cycle fluid in the second heat exchanger channels and the 3rd heat exchanger channels, i.e. increase and fuel or air carries out the cycle fluid flow of heat exchange, the heat making fuel or air obtain increases, thus improves fuel or the temperature of air entrance gas turbine 100；So repeatedly regulate, finally make to enter the fuel temperature of gas turbine 100 or air themperature reaches Theoretical Calculation and makes the set temperature value that combustion and steam association system efficiency is the highest.
The import of the 4th heat exchanger channels is docked with fuels sources, and the fuel entering gas turbine 100 is heated by preheating heat exchanger 310.
Combustion and steam association system also includes fuel heater 410, fuel heater 410 has the 5th heat exchanger channels and the 6th heat exchanger channels matched, waste heat boiler is provided with pump mouth, the import of the 5th heat exchanger channels is docked with pump mouth, the outlet of the 5th heat exchanger channels is docked with the feed-water inlet of waste heat boiler, the import of the 6th heat exchanger channels is docked with the outlet of the 4th heat exchanger channels, and the outlet of the 6th heat exchanger channels is docked with the fuel inlet of gas turbine 100.Fuel after preheating heat exchanger 310 for the first time heating second time in fuel heater 410 is heated, improves the temperature of the fuel entering gas turbine 100 further.Pump mouth is provided with flow control valve 420 between the import of the 5th heat exchanger channels；But it is not limited to this, as required, it is also possible to be, between the feed-water inlet being exported to waste heat boiler of the 5th heat exchanger channels, is provided with flow control valve 420.The fuel temperature of the outlet of the 6th heat exchanger channels is 175 DEG C to 185 DEG C.
Combustion and steam association system progress control method, including:
A, fuel and air enter work by combustion in gas turbine 100, flue gas after acting enters in waste heat boiler 210, feedwater to waste heat boiler is heated, feedwater is heated to be steam entrance steam turbine 220 and does work, and the steam after acting is cooled to feedwater through condenser 230 and is back to waste heat boiler 210；
The cooling water of condenser 230 enters the first heat exchanger channels, cycle fluid circulates in the second heat exchanger channels, the 3rd heat exchanger channels, part steam in steam turbine 220 enters in driving heat source passage the driving force as absorption heat pump 300 from extraction opening, make cycle fluid be warmed in the second heat exchanger channels, and cool down water and lower the temperature in the first heat exchanger channels；Cycle fluid heating after intensification flows through air or the fuel of the 4th heat exchanger channels, makes the air of entrance gas turbine 100 or fuel temperature raise.
The temperature of air or the temperature of fuel at fuel inlet at B, gas turbine 100 air intlet detected according to temperature sensor, regulation flow control valve 320, the flow of control cycle fluid in the second heat exchanger channels and the 3rd heat exchanger channels, thus control to enter fuel or the temperature of air of gas turbine 100.
Described pump mouth is provided with flow control valve 420 between the import of described 5th heat exchanger channels；But it is not limited to this, it is also possible to be, between the feed-water inlet being exported to described waste heat boiler of described 5th heat exchanger channels, is provided with flow control valve 420.By regulation flow control valve 420, can control to enter from pump mouth the feedwater flow of fuel heater 410, thus control the fuel temperature after being heated by fuel heater 410.Fuel inlet at gas turbine 100 is provided with temperature sensor, the fuel temperature detected according to temperature sensor, regulation flow control valve 420 is similar with the regulation of flow control valve 320, combine regulation flow control valve 320 and flow control valve 420 so that the fuel temperature or the air themperature that enter gas turbine 100 reach Theoretical Calculation and make the set temperature value that combustion and steam association system efficiency is the highest.
Each technical characteristic of above example can combine arbitrarily, for making description succinct, all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics does not exist contradiction, all it is considered to be the scope that this specification is recorded.
Above example only have expressed several embodiments of the present utility model, and it describes more concrete and detailed, but therefore can not be interpreted as the restriction to utility model patent scope.It should be pointed out that, for the person of ordinary skill of the art, without departing from the concept of the premise utility, it is also possible to make some deformation and improvement, these broadly fall into protection domain of the present utility model.Therefore, the protection domain of this utility model patent should be as the criterion with claims.
Claims (7)
1. a combustion and steam association system, it is characterised in that including:
Gas turbine；
Steam circuit, described steam circuit is provided with waste heat boiler, steam turbine and condenser, and described steam turbine is provided with extraction opening, and described waste heat boiler is provided with pump mouth；
Absorption heat pump, described absorption heat pump has the first heat exchanger channels, the second heat exchanger channels and the driving heat source passage matched；
Preheating heat exchanger, described preheating heat exchanger has the 3rd heat exchanger channels and the 4th heat exchanger channels matched；
Fuel heater, described fuel heater has the 5th heat exchanger channels and the 6th heat exchanger channels matched；
Wherein, the import of described driving heat source passage is docked with described extraction opening, and the outlet of described driving heat source passage is docked with the steam inlet of described condenser；
The import of described first heat exchanger channels is docked with the cooling water outlet of described condenser, and the outlet of described first heat exchanger channels is docked with low-temperature receiver or cooling tower；
The import of described second heat exchanger channels is docked with the outlet of described 3rd heat exchanger channels, and the outlet of described second heat exchanger channels is docked with the import of described 3rd heat exchanger channels；
The import of described 4th heat exchanger channels is docked with air source or fuels sources, and the outlet of described 4th heat exchanger channels is docked with air intlet or the fuel inlet of described gas turbine；
It is provided with flow control valve between the import of the 5th heat exchanger channels；Or, between the feed-water inlet being exported to described waste heat boiler of described 5th heat exchanger channels, it is provided with flow control valve.
Combustion and steam association system the most according to claim 1, it is characterised in that be provided with flow control valve between outlet and the import of described 3rd heat exchanger channels of described second heat exchanger channels；Or, between import and the outlet of described 3rd heat exchanger channels of described second heat exchanger channels, it is provided with flow control valve.
Combustion and steam association system the most according to claim 1, it is characterised in that the air intlet of described gas turbine is provided with temperature sensor；Or/and, the fuel inlet of described gas turbine is provided with temperature sensor.
Combustion and steam association system the most according to claim 1, it is characterized in that, the import also including described 5th heat exchanger channels is docked with described pump mouth, the outlet of described 5th heat exchanger channels is docked with the feed-water inlet of described waste heat boiler, the import of described 6th heat exchanger channels is docked with the outlet of described 4th heat exchanger channels, and the outlet of described 6th heat exchanger channels is docked with the fuel inlet of described gas turbine.
Combustion and steam association system the most according to claim 1, it is characterised in that the fuel temperature of the outlet of described 6th heat exchanger channels is 175 DEG C to 185 DEG C.
6. according to the combustion and steam association system described in any one of claim 1 to 5, it is characterised in that the fuel gas temperature of the outlet of described 4th heat exchanger channels or air themperature are 100 DEG C to 120 DEG C.
7. according to the combustion and steam association system described in any one of claim 1 to 5, it is characterised in that the cooling water temperature of the outlet of described first heat exchanger channels is 25 DEG C to 35 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521144201.5U CN205445803U (en) | 2015-12-31 | 2015-12-31 | Gas steam combination system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521144201.5U CN205445803U (en) | 2015-12-31 | 2015-12-31 | Gas steam combination system |
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| CN205445803U true CN205445803U (en) | 2016-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201521144201.5U Withdrawn - After Issue CN205445803U (en) | 2015-12-31 | 2015-12-31 | Gas steam combination system |
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| CN (1) | CN205445803U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105484816A (en) * | 2015-12-31 | 2016-04-13 | 中国能源建设集团广东省电力设计研究院有限公司 | Fuel gas and steam combination system and running control method thereof |
| CN108868911A (en) * | 2018-01-12 | 2018-11-23 | 至玥腾风科技投资集团有限公司 | A kind of electricity generation system and its control method |
-
2015
- 2015-12-31 CN CN201521144201.5U patent/CN205445803U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105484816A (en) * | 2015-12-31 | 2016-04-13 | 中国能源建设集团广东省电力设计研究院有限公司 | Fuel gas and steam combination system and running control method thereof |
| CN108868911A (en) * | 2018-01-12 | 2018-11-23 | 至玥腾风科技投资集团有限公司 | A kind of electricity generation system and its control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160810 Effective date of abandoning: 20170804 |
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| AV01 | Patent right actively abandoned |