CN203614234U - System for heating natural gas by using waste heat of waste heat boiler of gas turbine power plant - Google Patents
System for heating natural gas by using waste heat of waste heat boiler of gas turbine power plant Download PDFInfo
- Publication number
- CN203614234U CN203614234U CN201320838829.XU CN201320838829U CN203614234U CN 203614234 U CN203614234 U CN 203614234U CN 201320838829 U CN201320838829 U CN 201320838829U CN 203614234 U CN203614234 U CN 203614234U
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- pipeline
- gas
- natural gas
- waste heat
- heat exchanger
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- 239000007789 gas Substances 0.000 title claims abstract description 60
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 56
- 239000003345 natural gas Substances 0.000 title claims abstract description 28
- 239000002918 waste heat Substances 0.000 title claims abstract description 15
- 238000010438 heat treatment Methods 0.000 title claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000000779 smoke Substances 0.000 claims abstract description 7
- 239000011435 rock Substances 0.000 claims description 28
- 238000002485 combustion reaction Methods 0.000 claims description 14
- 230000008676 import Effects 0.000 claims description 3
- 238000007599 discharging Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000003517 fume Substances 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
Abstract
The utility model discloses a system for heating natural gas by using waste heat of a waste heat boiler of a gas turbine power plant. The system comprises a tail heat exchanger, a natural gas heater, a pipeline I, a pipeline II and a bypass pipeline III, wherein the pipeline I is used for connecting a water outlet of the tail heat exchanger and a water inlet of the natural gas heater; the pipeline II is used for connecting a water inlet of the tail heat exchanger and a water outlet of the natural gas heater; the bypass pipeline III is used for connecting a natural gas inlet and a gas outlet; a stop valve I is arranged on the pipeline I; a boosting pump is arranged on the pipeline II; a stop valve II and a stop valve III are arranged in front of and behind the boosting pump respectively; and a normally closed ball valve is arranged on the pipeline III. By adoption of the system, the natural gas temperature is increased by 12 DEG C, the exhaust gas temperature of the waste heat boiler is reduced by 9 DEG C, the exhaust smoke waste heat of the waste heat boiler is recovered, heat pollution to the environment caused by the gas turbine power plant is reduced, and the natural gas cost of a 9F-grade gas turbine can be saved by about 2,200,000 Yuan per year.
Description
Technical field
The utility model relates to a kind of heated by natural gas system, and especially the dynamo-electric factory of 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 there are some to limit to supply rock gas, 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 requirement of the degree of superheat, need heating unit be set in voltage regulating station module.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: the fuel of water-bath stove is a part of rock gas 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 need temperature.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 to consume a large amount of electric energy, and the station service of power plant is significantly 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, and therefore prior art generally adopts water-bath stove heat protocol.
Model utility content
The purpose of this utility model 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, reduce 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 utility model 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, connect the pipeline I of afterbody heat exchanger water outlet and gas heater water intake, connect the pipeline II of afterbody heat exchanger water intake and gas heater water outlet, and connect the bypass duct III of 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 import and the outlet conduit 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 for subsequent use.
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 beneficial effects of the utility model are: the utility model 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 reduce 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 utility model 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 the utility model structural representation;
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 utility model is described further:
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, the pipeline I that connects afterbody heat exchanger 1 water outlet and gas heater 3 water intakes, is provided with stop valve I2 in pipeline I; Article one, the pipeline II that connects afterbody heat exchanger 1 water intake and gas heater 3 water outlets, is provided with 5, one operations of suction booster in pipeline II, one for subsequent use, is provided with a stop valve II4 and stop valve III6 before and after every suction booster; Article one, the bypass duct III that connects gas heater 3 suction ports and air outlet, is provided with normally-closed ball valve 8 in bypass duct III; 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 gas heater 3 rock gas is heated, after suction booster 5 pressurizations, enter exhaust heat boiler afterbody heat exchanger 1 with the circulating water being cooled after heat exchange gas and absorb the smoke discharging residual heat of exhaust heat boiler, carry out next one circulation, this system is closed circulation system.
By reference to the accompanying drawings embodiment of the present utility model is described although above-mentioned; but the not restriction to the utility model protection domain; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay various modifications that creative work can make or distortion still in protection domain of the present utility model.
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, connect the pipeline I of afterbody heat exchanger water outlet and gas heater water intake, connect the pipeline II of afterbody heat exchanger water intake and gas heater water outlet, and connect the bypass duct III of 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 import and the outlet conduit 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 for subsequent use.
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, enter exhaust heat boiler afterbody heat exchanger with the circulating water after heat exchange gas through suction booster pressurization, carry out next one circulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320838829.XU CN203614234U (en) | 2013-12-18 | 2013-12-18 | System for heating natural gas by using waste heat of waste heat boiler of gas turbine power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320838829.XU CN203614234U (en) | 2013-12-18 | 2013-12-18 | System for heating natural gas by using waste heat of waste heat boiler of gas turbine power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203614234U true CN203614234U (en) | 2014-05-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320838829.XU Expired - Lifetime CN203614234U (en) | 2013-12-18 | 2013-12-18 | System for heating natural gas by using waste heat of waste heat boiler of gas turbine power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203614234U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103628985A (en) * | 2013-12-18 | 2014-03-12 | 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 in gas turbine power plant |
-
2013
- 2013-12-18 CN CN201320838829.XU patent/CN203614234U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103628985A (en) * | 2013-12-18 | 2014-03-12 | 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 in gas turbine power plant |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140528 |
|
| CX01 | Expiry of patent term |