CN209876968U - Waste heat utilization system for starting boiler of gas turbine power plant - Google Patents
Waste heat utilization system for starting boiler of gas turbine power plant Download PDFInfo
- Publication number
- CN209876968U CN209876968U CN201920492611.0U CN201920492611U CN209876968U CN 209876968 U CN209876968 U CN 209876968U CN 201920492611 U CN201920492611 U CN 201920492611U CN 209876968 U CN209876968 U CN 209876968U
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- China
- Prior art keywords
- medium water
- heating
- boiler
- waste heat
- heat
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
Abstract
The utility model discloses a gas turbine power plant starting boiler waste heat utilization system, wherein a starting boiler smoke exhaust mechanism is internally provided with a superheater, a boiler economizer and a waste heat economizer which are sequentially arranged along the smoke exhaust direction; a heat medium water circulation inlet of the heating water tank is communicated with one end of the first heat medium water heat exchange channel; two ends of a second heat medium water heat exchange channel of the natural gas heating device are communicated with a heat medium water circulation outlet of the heating water tank and the first heat medium water heat exchange channel respectively. By the aid of the optimally designed gas turbine power plant starting boiler waste heat utilization system, the waste heat of the tail flue of the starting boiler is utilized to heat the heating medium water required by the natural gas heating device, and a small amount of starting boiler superheated steam is supplemented, so that the gas turbine system is guaranteed to operate safely and efficiently, and energy consumption is reduced; the use of superheated steam of a high-grade heat energy starting boiler is reduced, and the gradient utilization of energy is realized; and the adjustment mode increases the adjustment means of natural gas heating and widens the adjustment range.
Description
Technical Field
The utility model relates to a boiler waste heat utilization field especially relates to a gas turbine power plant starts boiler waste heat utilization system.
Background
The natural gas temperature has great influence on the combustion of the gas turbine and the dynamic characteristics of the combustion chamber, and meanwhile, the natural gas temperature is also used for fuel calculation fuel flow and fuel analysis, so that the reasonable natural gas inlet temperature is guaranteed to be important. The lowest natural gas temperature is above the dew point of the hydrocarbons to avoid liquefaction of the hydrocarbons. The gaseous fuel supply temperature is maintained at least at a superheat of 28 c above the hydrocarbon dew point, at which time liquid hydrocarbons and water cannot be present in the gaseous fuel. In order to meet the requirement of natural gas temperature, in the process that a unit is ignited to be full-speed and no-load, the natural gas temperature is mainly controlled in two types, one type is heating through an electric heater, the other type is heating medium water by starting a boiler to overheat steam in a mixed mode, and then heat exchange is carried out through a gas-water heat exchanger. And in the normal loaded stage of the unit, the natural gas can be heated by the waste heat of the flue gas at the tail part of the waste heat boiler. The electric heater usually adopts temperature difference control, and the difference value of heater export natural gas temperature and entry temperature is less than a definite value, and electric heater starts always, stops work after the difference reaches a definite value, and in addition, when heater export natural gas temperature was too high, heater automatic tripping operation prevented the inside natural gas of heater local overheat carbonization.
In the existing natural gas heating system of the gas turbine power plant, an electric heating mode is usually adopted to heat natural gas in the starting stage of a unit, so that the energy consumption is huge, local overheating is easily caused, and the natural gas is carbonized; the gas turbine power plant provided with the starting boiler usually utilizes the superheated steam generated by the starting boiler to heat natural gas through heat exchange, the natural gas is usually heated to 40-60 ℃, and the high-temperature and high-pressure superheated steam is used for heating the natural gas, so that the economy is low.
SUMMERY OF THE UTILITY MODEL
For the technical problem who exists among the solution background art, the utility model provides a gas turbine power plant starts boiler waste heat utilization system.
The utility model provides a gas turbine power plant starts boiler waste heat utilization system, include: starting a boiler hearth, a tail flue, a heating water tank and a natural gas heating device;
starting a boiler furnace and a tail flue, wherein smoke exhaust channels are arranged in the boiler furnace and the tail flue, a superheater, a boiler economizer and a waste heat economizer which are sequentially arranged along the smoke exhaust direction are arranged in the smoke exhaust channels, and a first hot medium water heat exchange channel is arranged in the waste heat economizer;
the heating water tank is provided with a heating medium water circulation inlet and a heating medium water circulation outlet, and the heating medium water circulation inlet is communicated with one end of the first heating medium water heat exchange channel through a pipeline;
the natural gas heating device is provided with a second heat medium water heat exchange channel, one end of the second heat medium water heat exchange channel is communicated with a heat medium water circulation outlet of the heating water tank, and the other end of the second heat medium water heat exchange channel is communicated with one end, far away from the heating water tank, of the first heat medium water heat exchange channel through a pipeline.
Preferably, a booster pump is arranged on a pipeline between the hot water circulating inlet and the first hot water heat exchange channel.
Preferably, the heating water tank is also provided with a superheated steam inlet.
Preferably, a spray header is arranged in the heating water tank, and the spray header is communicated with the heat medium water circulation inlet.
Preferably, a water replenishing port is arranged on a pipeline between the second heat medium water heat exchange channel and the first heat medium water heat exchange channel.
Preferably, the structure of the waste heat economizer adopts a spiral fin type, a light pipe type or an H-shaped fin type.
Preferably, the exhaust end of the smoke evacuation channel is provided with a smoke evacuation chimney.
In the utility model, the gas turbine power plant starts the boiler waste heat utilization system, the smoke exhaust channel for starting the boiler furnace and the tail flue is internally provided with the superheater, the boiler economizer and the waste heat economizer which are sequentially arranged along the smoke exhaust direction, and the waste heat economizer is internally provided with a first hot media water heat exchange channel; a heat medium water circulation inlet of the heating water tank is communicated with one end of the first heat medium water heat exchange channel; two ends of a second heat medium water heat exchange channel of the natural gas heating device are communicated with a heat medium water circulation outlet of the heating water tank and the first heat medium water heat exchange channel respectively. By the aid of the optimally designed gas turbine power plant starting boiler waste heat utilization system, the waste heat of the tail flue of the starting boiler is utilized to heat the heating medium water required by the natural gas heating device, and a small amount of starting boiler superheated steam is supplemented, so that the requirement of heating natural gas to a specific temperature is met, the safe and efficient operation of the gas turbine system is guaranteed, and energy consumption is reduced; the use of superheated steam of a high-grade heat energy starting boiler is reduced, and the gradient utilization of energy is realized; and the adjustment mode increases the adjustment means of natural gas heating and widens the adjustment range.
Drawings
Fig. 1 is the utility model provides a combustion engine power plant starts boiler waste heat utilization system's schematic structure.
Detailed Description
As shown in fig. 1, fig. 1 is a schematic structural diagram of a starting boiler waste heat utilization system of a gas turbine power plant according to the present invention.
Referring to fig. 1, the utility model provides a gas turbine power plant starts boiler waste heat utilization system, include: starting a boiler smoke exhaust mechanism 13, a heating water tank 8 and a natural gas heating device 15;
a smoke exhaust channel 12 is arranged in a boiler smoke exhaust mechanism 13, a superheater 11, a boiler economizer 5 and a waste heat economizer 4 which are sequentially arranged along the smoke exhaust direction are arranged in the smoke exhaust channel 12, and a first hot water heat exchange channel is arranged in the waste heat economizer 4;
a heating medium water circulation inlet and a heating medium water circulation outlet are formed in the heating water tank 8, and the heating medium water circulation inlet is communicated with one end of the first heating medium water heat exchange channel through a pipeline;
the natural gas heating device 15 is provided with a second heat medium water heat exchange passage, one end of the second heat medium water heat exchange passage is communicated with a heat medium water circulation outlet of the heating water tank 8, and the other end of the second heat medium water heat exchange passage is communicated with one end of the heating water tank 8, which is far away from the first heat medium water heat exchange passage, through a pipeline.
In the specific working process of the starting boiler waste heat utilization system of the gas turbine power plant of the embodiment, flue gas formed when a boiler is started to burn enters a smoke exhaust mechanism, flows through a waste heat economizer after heat exchange is carried out in a smoke exhaust channel through a superheater and the boiler economizer, is further cooled by the waste heat economizer and then is exhausted into the atmosphere; the natural gas heating device heats natural gas by utilizing heat medium water through gas-water heat exchange, the heat medium water after heating the natural gas flows back to the waste heat economizer in the smoke exhaust channel through the natural gas heating device, the heat medium water is reheated by smoke gas in the waste heat economizer, then enters the heating water tank through the waste heat economizer through the heat medium water circulation inlet to be mixed, and the mixed heat medium water enters the natural gas heating device to heat the natural gas, so that a cycle is completed.
In the embodiment, the provided starting boiler waste heat utilization system of the gas turbine power plant is characterized in that a superheater, a boiler economizer and a waste heat economizer which are sequentially arranged along a smoke discharge direction are arranged in a smoke discharge channel of a starting boiler smoke discharge mechanism, and a first hot medium water heat exchange channel is arranged in the waste heat economizer; a heat medium water circulation inlet of the heating water tank is communicated with one end of the first heat medium water heat exchange channel; two ends of a second heat medium water heat exchange channel of the natural gas heating device are communicated with a heat medium water circulation outlet of the heating water tank and the first heat medium water heat exchange channel respectively. By the aid of the optimally designed gas turbine power plant starting boiler waste heat utilization system, the waste heat of the tail flue of the starting boiler is utilized to heat the heating medium water required by the natural gas heating device, and a small amount of starting boiler superheated steam is supplemented, so that the requirement of heating natural gas to a specific temperature is met, the safe and efficient operation of the gas turbine system is guaranteed, and energy consumption is reduced; the use of superheated steam of a high-grade heat energy starting boiler is reduced, and the gradient utilization of energy is realized; and the adjustment mode increases the adjustment means of natural gas heating and widens the adjustment range.
In a specific embodiment, a booster pump 9 is arranged on a pipeline between the hot water circulation inlet and the first hot water heat exchange channel, and the hot water entering the second hot water heat exchange channel is pressurized by the booster pump.
In other specific embodiments, the heating water tank 8 is further provided with a superheated steam inlet 7; when the temperature of the heat medium water cannot meet the requirement of heating natural gas to the specified temperature, a small amount of starting boiler superheated steam is introduced into the heating water tank through the superheated steam inlet, and the superheated steam can enter the heating water tank to be mixed with the heat medium water so as to meet the requirement of heat and improve the utilization rate of waste heat.
For improvement, a spray header is arranged in the heating water tank 8 and is communicated with the heat medium water circulation inlet; thereby enhancing the mixing of the heating medium water in the heating water tank.
In order to supplement the loss of the hot medium water in the circulation, a water supplementing port 2 is arranged on a pipeline between the second hot medium water heat exchange channel and the first hot medium water heat exchange channel, and water is supplemented into the circulation water channel through the water supplementing port.
In a specific selection mode of the waste heat economizer, the structure of the waste heat economizer 4 adopts a spiral fin type, a light pipe type or an H-shaped fin type.
In a specific design mode of the smoke exhaust mechanism, a smoke exhaust chimney 3 is arranged at the exhaust end of the smoke exhaust channel 12, and the exhaust gas cooled through heat exchange is convenient to exhaust through the smoke exhaust chimney.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (7)
1. The utility model provides a gas turbine power plant starts boiler waste heat utilization system which characterized in that includes: starting a boiler smoke exhaust mechanism (13), a heating water tank (8) and a natural gas heating device (15);
a smoke exhaust channel (12) is arranged in the boiler smoke exhaust mechanism (13), a superheater (11), a boiler economizer (5) and a waste heat economizer (4) which are sequentially arranged along the smoke exhaust direction are arranged in the smoke exhaust channel (12), and a first hot medium water heat exchange channel is arranged in the waste heat economizer (4);
a heating medium water circulation inlet and a heating medium water circulation outlet are arranged on the heating water tank (8), and the heating medium water circulation inlet is communicated with one end of the first heating medium water heat exchange channel through a pipeline;
the natural gas heating device (15) is provided with a second heat medium water heat exchange channel, one end of the second heat medium water heat exchange channel is communicated with a heat medium water circulation outlet of the heating water tank (8), and the other end of the second heat medium water heat exchange channel is communicated with one end, far away from the heating water tank (8), of the first heat medium water heat exchange channel through a pipeline.
2. The gas turbine power plant startup boiler waste heat utilization system of claim 1, characterized in that a booster pump (9) is provided on a pipeline between the hot water circulation inlet and the first hot water heat exchange channel.
3. The gas turbine power plant startup boiler waste heat utilization system of claim 1, characterized in that the heating water tank (8) is further provided with a superheated steam inlet (7).
4. The starting boiler waste heat utilization system of a gas turbine power plant as claimed in claim 1 or 3, characterized in that a spray header is arranged in the heating water tank (8), and the spray header is communicated with the hot medium water circulation inlet.
5. The gas turbine power plant startup boiler waste heat utilization system of claim 1, characterized in that a water replenishing port (2) is provided on a pipeline between the second hot medium water heat exchange channel and the first hot medium water heat exchange channel.
6. The waste heat utilization system of the starting boiler of the gas turbine power plant as claimed in claim 1, characterized in that the structure of the waste heat economizer (4) is a spiral fin type, a light pipe type or an H fin type.
7. Gas turbine power plant starting boiler waste heat utilization system according to claim 1, characterized in that the exhaust end of the flue gas channel (12) is provided with a flue gas chimney (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920492611.0U CN209876968U (en) | 2019-04-12 | 2019-04-12 | Waste heat utilization system for starting boiler of gas turbine power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920492611.0U CN209876968U (en) | 2019-04-12 | 2019-04-12 | Waste heat utilization system for starting boiler of gas turbine power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209876968U true CN209876968U (en) | 2019-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920492611.0U Expired - Fee Related CN209876968U (en) | 2019-04-12 | 2019-04-12 | Waste heat utilization system for starting boiler of gas turbine power plant |
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| CN (1) | CN209876968U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110056900A (en) * | 2019-04-12 | 2019-07-26 | 中国大唐集团科学技术研究院有限公司华东电力试验研究院 | A kind of GTCC power plant starting trouble afterheat utilizing system |
-
2019
- 2019-04-12 CN CN201920492611.0U patent/CN209876968U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110056900A (en) * | 2019-04-12 | 2019-07-26 | 中国大唐集团科学技术研究院有限公司华东电力试验研究院 | A kind of GTCC power plant starting trouble afterheat utilizing system |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191231 Termination date: 20210412 |
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| CF01 | Termination of patent right due to non-payment of annual fee |