CN114233477A - Variable flow and variable temperature double-loop closed circulation intercooling system of gas turbine - Google Patents
Variable flow and variable temperature double-loop closed circulation intercooling system of gas turbine Download PDFInfo
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- CN114233477A CN114233477A CN202111520021.2A CN202111520021A CN114233477A CN 114233477 A CN114233477 A CN 114233477A CN 202111520021 A CN202111520021 A CN 202111520021A CN 114233477 A CN114233477 A CN 114233477A
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- 239000013505 freshwater Substances 0.000 claims abstract description 127
- 238000001816 cooling Methods 0.000 claims abstract description 67
- 230000001105 regulatory effect Effects 0.000 claims abstract description 46
- 239000013535 sea water Substances 0.000 claims abstract description 30
- 239000000498 cooling water Substances 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 187
- 230000001502 supplementing effect Effects 0.000 claims description 27
- 239000007788 liquid Substances 0.000 claims description 14
- 230000003020 moisturizing effect Effects 0.000 claims description 12
- 239000010865 sewage Substances 0.000 claims description 5
- 238000005260 corrosion Methods 0.000 claims description 4
- 230000007797 corrosion Effects 0.000 claims description 4
- 238000005086 pumping Methods 0.000 claims description 4
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 230000009977 dual effect Effects 0.000 claims 2
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000009423 ventilation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/12—Cooling of plants
- F02C7/14—Cooling of plants of fluids in the plant, e.g. lubricant or fuel
- F02C7/141—Cooling of plants of fluids in the plant, e.g. lubricant or fuel of working fluid
- F02C7/143—Cooling of plants of fluids in the plant, e.g. lubricant or fuel of working fluid before or between the compressor stages
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/12—Cooling of plants
- F02C7/16—Cooling of plants characterised by cooling medium
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C9/00—Controlling gas-turbine plants; Controlling fuel supply in air- breathing jet-propulsion plants
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- Combustion & Propulsion (AREA)
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- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention provides a variable-flow and variable-temperature double-loop closed-cycle indirect cooling system of a gas turbine, wherein the indirect cooling system adopts a closed double-circulation system, so that the indirect cooling system can be continuously used for a long time after being filled with fresh water for an onboard heat exchange system, and the stability of parameters of the system during long-time operation is ensured; the indirect cooling system is fully combined with actual conditions during ocean work, fresh water circulation is adopted in the on-board heat exchange system, so that key components such as the indirect cooler are prevented from rusting when working for a long time, the off-board cooling system directly sucks seawater as cooling water through the ocean, and the off-board heat exchanger exchanges heat with the fresh water and then directly discharges the seawater. The fresh water flow regulating range is wide, the heat exchange requirements of the gas turbine under various working conditions can be met, the working conditions of the ocean are simulated, the external cooling system can be taken from the seawater, used and discharged, too many heat exchange devices and storage devices are prevented from being introduced, the structure is simple and compact, the operability is strong, and safety and maintenance are considered at the same time.
Description
Technical Field
The invention relates to an indirect cooling system of an indirect cooling circulation gas turbine, belongs to the field of heat energy and power engineering, and particularly relates to a variable-flow and variable-temperature double-loop closed indirect cooling circulation system, which ensures the heat exchange requirement of through-flow gas under all working conditions of the indirect cooling circulation gas turbine, adjusts the heat exchange parameters of the gas turbine and consists of a water supplementing system, an on-machine heat exchange system and an off-machine cooling system.
Background
The gas turbine is widely applied to power propulsion devices and power generation devices of power systems due to the advantages of high specific power, low vibration noise, good maneuverability and the like. The indirect cooling circulation gas turbine has become one of the main development trends of the current gas turbine due to the characteristics of high power density, low oil consumption, excellent variable working condition performance, low noise, low exhaust and the like. The performance of the intercooling system, which is a key system of the intercooling cycle gas turbine, directly influences the overall performance of the intercooling cycle gas turbine.
The indirect cooling system is positioned between stages of the compressor of the indirect cooling circulation gas turbine and is used for continuously cooling high-temperature and high-pressure air behind a certain stage of the compressor. Under different working conditions, the flow rates of high-temperature high-pressure air in through-flow of the indirect cooling circulation gas turbine are different, an indirect cooling system is required to provide cooling water with corresponding flow rate so as to cool the high-temperature high-pressure air to corresponding temperature, and meanwhile, under different use conditions, corresponding adjustment is required to be carried out through an external heat exchange system. Therefore, the indirect cooling system is required to have the functions of adjustable flow on the machine and adjustable cooling temperature outside the machine.
Disclosure of Invention
The invention provides a variable-flow and variable-temperature double-loop closed circulation intercooling system, which can meet the heat exchange requirements of through-flow gas under different working conditions of an intercooling circulation gas turbine, improve the efficiency of a unit, adjust the heat exchange parameters of the gas turbine according to the unit requirements, and ensure the stable and efficient operation of the intercooling circulation gas turbine.
The purpose of the invention is realized as follows: the system comprises a water supplementing system, an on-board heat exchange system and an off-board cooling system, wherein the on-board heat exchange system provides cold fresh water with stable flow and continuously flows through an intercooler, high-temperature and high-pressure air from a certain stage of compressor is cooled to a certain temperature through the intercooler, the fresh water heated by the high-temperature and high-pressure air flows through an off-board heat exchanger and exchanges heat with cooling water provided by the off-board cooling system, and flows back to a circulating water tank again after the temperature is reduced to an initial temperature, and then is pumped to the intercooler by a circulating water pump to form closed circulation of the on-board heat exchange system.
Further, the on-board heat exchange system comprises a circulating water tank, a variable-frequency circulating water pump, a stop valve, a safety relief valve, a discharge valve, an intercooler, a bypass regulating valve, a three-way regulating valve, a flowmeter, an off-board heat exchanger, a pressure sensor, a temperature sensor and a liquid level meter; the fresh water pipeline behind the circulating water pump is provided with a safety relief valve, when the problem of abnormal closing of a valve occurs in an upper heat exchange system, the pressure of the fresh water in front of the intercooler is instantly increased due to the fact that the circulating water pump still works continuously, when the pressure exceeds an upper limit value, the safety relief valve is opened to discharge the fresh water in the system, the circulating water pump is prevented from being damaged, the fresh water in the system is discharged to a sewage tank through a drain valve, or the fresh water in the system is pumped back to a water supplementing tank from the circulating water tank by closing an electric stop valve of the water supplementing system, opening a manual stop valve and opening the circulating water pump; and pumping a water in the circulating water tank to each part of the on-board heat exchange system, basically emptying the circulating water tank, replenishing fresh water to the circulating water tank according to the water replenishing operation, pumping the fresh water in the circulating water tank to each part of the on-board heat exchange system until the whole on-board heat exchange system is filled with fresh water, and closing a vent valve at the top of the circulating water tank to form a closed on-board heat exchange system.
Further, the water supplementing system comprises a water supplementing tank, a water supplementing pump, a manual stop valve, an electric stop valve, a discharge valve and a liquid level meter; opening water charging system's electronic stop valve, close manual stop valve, open the vent valve at circulating water tank top, close quick-witted last heat transfer system's stop valve, start the moisturizing pump, replenish fresh water to circulating water tank from the moisturizing tank, whether stop supplying water according to the level gauge feedback display on the circulating water tank, after filling up circulating water tank with fresh water, close all valves of moisturizing system, open quick-witted last heat transfer system's stop valve, close the bypass governing valve, start circulating water pump, with fresh water pump to quick-witted heat transfer system everywhere in the circulating water tank, carry out the moisturizing to circulating water tank through the moisturizing system, for preventing inside and intercooler part corrosion of system, use fresh water in the moisturizing box.
Furthermore, the external cooling system comprises a cooling mixing water tank, a pre-pump filter, a flowmeter, a mixing water pump, a three-way regulating valve, a temperature sensor and a liquid level meter, wherein the three-way regulating valve is arranged on a fresh water pipeline in front of the external heat exchanger, part of fresh water can enter the external heat exchanger by regulating the opening degree of the three-way regulating valve, and part of the fresh water directly returns to the circulating water tank, so that the outlet temperature of the circulating water tank is regulated.
Further, the indirect cooling system is put into operation before the gas turbine is started, the circulating water pump is started at low frequency, the fresh water flow of the on-machine heat exchange system is read out through the flow meter after the system is stabilized, the mixing water pump of the off-machine cooling system is started, seawater is continuously sucked in and enters the off-machine heat exchanger through the filter, the fresh water after the high-temperature and high-pressure air flows through the cooling system exchanges heat, and the system flow is read out through the flow meter; the seawater flows into the sea again after flowing through the heat exchanger; and finishing the starting operation of the intercooling system.
Further, the system provides two kinds of fresh water flow rate adjusting modes for realizing the on-board heat exchange system of the gas turbine under different working conditions in a large range: the fresh water flow can be adjusted by adjusting the working frequency of the circulating water pump, the fresh water pipeline entering the intercooler and the fresh water pipeline flowing out of the intercooler are communicated and provided with a bypass adjusting valve, and the fresh water flow flowing into the intercooler is achieved by adjusting the bypass adjusting valve under the condition that the working frequency of the circulating water pump is not changed.
Compared with the prior art, the invention has the beneficial effects that:
1. the indirect cooling system adopts a closed double-circulation system, so that the indirect cooling system can be continuously used for a long time after being filled with fresh water, and the stability of each parameter of the indirect cooling system during long-time operation is ensured;
2. the indirect cooling system fully combines the actual conditions of the ship during ocean work, the fresh water circulation is adopted in the on-board heat exchange system, so that key components such as the indirect cooler are prevented from rusting when working for a long time, the off-board cooling system directly sucks seawater as cooling water through the ocean, and the off-board heat exchanger exchanges heat with the fresh water and then directly discharges the cooling water into the ocean, so that the cooling water of the off-board cooling system can be taken, used and discharged immediately, excessive heat exchange devices and storage devices are prevented from being introduced, and the volume and the weight of the system are reduced;
3. the system can realize the fresh water flow adjustment of the on-board heat exchange system of the gas turbine under different working conditions. Fresh water flow regulation can be realized by two methods: the fresh water flow can be adjusted by adjusting the working frequency of the circulating water pump, then the fresh water pipeline entering the intercooler and the fresh water pipeline flowing out of the intercooler are communicated, and a bypass adjusting valve is installed, so that the fresh water flow supplied to the intercooler can be realized by adjusting the bypass valve under the condition that the working frequency of the circulating water pump is not changed. By the two measures, the fresh water flow of the on-board heat exchange system is adjusted in a large range;
4. the indirect cooling system can realize different heat exchange temperatures in a double circulation system so as to meet the unit requirements: firstly, a three-way regulating valve is arranged on a fresh water pipeline in front of an external heat exchanger, and partial fresh water can enter the external heat exchanger and directly return to a circulating water tank by regulating the opening degree of the three-way regulating valve, so that the outlet temperature of the circulating water tank is regulated. In the cooling system outside the machine, a three-way regulating valve is arranged at the seawater side outlet of the heat exchanger outside the machine, and the opening degree of the three-way regulating valve is regulated, so that part of seawater after heat exchange returns to the mixing water tank, and the other part of seawater is directly discharged into the sea, thereby regulating the outlet temperature of the mixing water tank;
5. detecting the front and back fresh water pressure of the intercooler and the front and back seawater pressure of the external heat exchanger by using a pressure sensor; adopting a temperature sensor to detect the temperature of fresh water before and after the intercooler and the temperature of seawater before and after the external heat exchanger; a liquid level meter is adopted to ensure that an alarm is given when the liquid level of the circulating water tank is lower than a specified value;
6. set up a safety relief valve on the fresh water pipeline behind circulating water pump, when the abnormal shut-off scheduling problem of valve appears in heat transfer system on machine, because circulating water pump is still continuously working, can lead to the fresh water pressure before the intercooler to promote in the twinkling of an eye, when pressure exceeded the upper limit value, safety relief valve opened and discharged fresh water in the system, prevents that circulating water pump from damaging.
7. When the machine needs cleaning and maintenance, the fresh water in the system can be discharged to the sewage tank through the blowoff valve, or the fresh water can be pumped back to the water replenishing tank from the circulating water tank by closing the electric stop valve of the water replenishing system, opening the manual stop valve and opening the circulating water pump.
Drawings
FIG. 1 is a schematic diagram of a system according to embodiment 1 of the present invention;
FIG. 2 is a schematic diagram of a water replenishing system according to embodiment 1 of the present invention;
FIG. 3 is a schematic diagram of an on-board heat exchange system according to embodiment 1 of the present invention;
fig. 4 is a schematic diagram of an outboard cooling system according to embodiment 1 of the present invention.
In the figure: 1-a liquid level meter; 2-a mixing water tank; 3-a filter; 4-a flow meter; 5-mixing water pump; 6-external heat exchanger; 7-a three-way regulating valve; 8-a circulating water tank; 9-a blowdown valve; 10-manual stop valve; 11-an electric stop valve; 12-a water replenishing pump; 13-variable frequency circulating water pump; 14-a shut-off valve; 15-water replenishing tank; 16-a safety relief valve; 17-a vent valve; 18-a bypass regulating valve; 19-an intercooler; 20-three-way regulating valve.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The invention relates to a variable-flow and variable-temperature double-loop closed circulation intercooling system which comprises a water replenishing system, an on-machine heat exchange system and an off-machine cooling system. The water supplementing system mainly comprises a water supplementing tank 15, a water supplementing pump 12, a manual stop valve 10, an electric stop valve 11, a discharge valve 9 and a liquid level meter 1; the on-board heat exchange system mainly comprises a circulating water tank 8, a variable-frequency circulating water pump 13, a stop valve 14, a safety relief valve 16, a discharge valve 9, an intercooler 19, a bypass regulating valve 18, a three-way regulating valve 20, a flowmeter 4, an off-board heat exchanger 6, a pressure sensor, a temperature sensor and a liquid level meter 1; the external cooling system mainly comprises a cooling mixing water tank 2, a pre-pump filter 3, a flowmeter 4, a mixing water pump 5, a three-way regulating valve 7, a temperature sensor and a liquid level meter 1.
When the gas turbine runs, the intercooling system is adjusted according to the working condition of the gas turbine. The on-board heat exchange system provides cold fresh water with stable flow, the cold fresh water flows through the intercooler, and high-temperature and high-pressure air from a certain stage of compressor is cooled to a certain temperature through the intercooler. The fresh water heated by the high-temperature and high-pressure air flows through the external heat exchanger to exchange heat with cooling water provided by an external cooling system, flows back to the circulating water tank again after the temperature is reduced to a set temperature, and is pumped to the intercooler by the circulating water pump to form closed circulation of the on-board heat exchange system.
When the system is used for the first time, the water needs to be supplemented to the circulating water tank 8 through the water supplementing system at first. In order to prevent the corrosion of the system interior and the components such as the intercooler 19, fresh water is used in the makeup tank 15. The method comprises the steps of opening an electric stop valve 11 of a water supplementing system, closing a manual stop valve 10, opening a vent valve 17 at the top of a circulating water tank, closing a stop valve 14 of an onboard heat exchange system, starting a water supplementing pump 12, supplementing fresh water to the circulating water tank 8 from a water supplementing tank 15, and judging whether water supply is stopped or not according to feedback display of a liquid level meter 1 on the circulating water tank 8. After the circulating water tank 8 is filled with fresh water, all valves of the water filling system are closed, a stop valve 14 of the on-board heat exchange system is opened, a bypass adjusting valve 18 is closed, a circulating water pump 13 is started, and the fresh water in the circulating water tank 8 is pumped to all positions of the on-board heat exchange system.
After the water in the circulating water tank 8 is pumped to all parts of the on-board heat exchange system, the circulating water tank 8 is basically emptied, the circulating water tank 8 is filled with fresh water according to the water supplementing operation again, the fresh water in the circulating water tank 8 is pumped to all parts of the on-board heat exchange system until the whole on-board heat exchange system is filled with fresh water, and at the moment, the ventilation valve 17 at the top of the circulating water tank is closed to form a closed on-board heat exchange system.
Before the gas turbine is started, the intercooling system is put into operation. And stop valves at all parts of the heat exchange system on the machine are sequentially started, so that the system loop is ensured to be smooth. The intercooling system is put into operation before the gas turbine is started. And (4) starting the circulating water pump 13 at a low frequency, and reading the fresh water flow of the on-machine heat exchange system through a flowmeter after the system is stable. And opening a mixing water pump 5 of the external cooling system, continuously sucking seawater, enabling the seawater to enter an external heat exchanger 6 through a filter 3, and reading the flow of the system through a flow meter 4 for heat exchange of fresh water after cooling through-flow high-temperature and high-pressure air. The fresh water is recycled after being reduced to a certain temperature. The seawater flows through the heat exchanger 6 and then flows into the sea again. And finishing the starting operation of the intercooling system.
The system provides two methods to realize the large-range adjustment of the fresh water flow of the on-board heat exchange system of the gas turbine under different working conditions. The fresh water flow can be adjusted by adjusting the working frequency of the circulating water pump 13 firstly, and then the fresh water pipeline entering the intercooler 19 is communicated with the fresh water pipeline exiting the intercooler 19 and is provided with the bypass adjusting valve 18, so that the fresh water flow entering the intercooler 19 can be realized by adjusting the bypass adjusting valve 18 under the condition of not changing the working frequency of the circulating water pump 13.
The indirect cooling system provides two modes to realize different heat exchange temperature adjustment of the double circulation system so as to verify the performance of the gas turbine. Firstly, a three-way regulating valve 20 is arranged on a fresh water pipeline in front of the external heat exchanger 6, and part of fresh water can enter the external heat exchanger 6 and directly return to the circulating water tank 8 by regulating the opening degree of the three-way regulating valve 20, so that the outlet temperature of the circulating water tank 8 is regulated. In the cooling system outside the machine, a three-way regulating valve 7 is arranged at the seawater side outlet of the heat exchanger 6 outside the machine, and by regulating the opening degree of the three-way regulating valve 7, part of seawater after heat exchange returns to the mixing water tank 2, and part of seawater is directly discharged into the sea, so that the seawater temperature of the mixing water tank 2 is regulated.
Set up a safety relief valve 16 on the fresh water pipeline behind circulating water pump, when the heat transfer system appears the valve and closes the scheduling problem unusually when the machine, because circulating water pump 13 is still continuously working, can lead to the fresh water pressure in the front of intercooler 19 to promote in the twinkling of an eye, when pressure exceedes the upper limit value, safety relief valve 16 opens and discharges the interior fresh water of system, prevents that circulating water pump 13 from damaging.
Fresh water in the system can be discharged to the sewage tank through the blowdown valve 9, or the fresh water can be pumped back to the water replenishing tank 15 from the circulating water tank 8 by closing the electric stop valve 11 of the water replenishing system, opening the manual stop valve 10 and opening the circulating water pump 12.
Example 1:
as shown in fig. 1, the variable flow and variable temperature double-loop closed cycle indirect cooling system includes a water replenishing system (fig. 2), an onboard heat exchange system (fig. 3), and an offboard cooling system (fig. 4).
When the water replenishing system is used, the circulating water tank 8 needs to be replenished with water firstly through the water replenishing system. In order to prevent the corrosion of the system interior and the components such as the intercooler 19, fresh water is used in the makeup tank 15. The method comprises the steps of opening an electric stop valve 11 of a water supplementing system, closing a manual stop valve 10, opening a vent valve 17 at the top of a circulating water tank, closing a stop valve 14 of an onboard heat exchange system, starting a water supplementing pump 12, supplementing fresh water to the circulating water tank 8 from a water supplementing tank 15, and judging whether water supply is stopped or not according to feedback display of a liquid level meter 1 on the circulating water tank 8. After the circulating water tank 8 is filled with fresh water, all valves of the water filling system are closed, a stop valve 14 of the on-board heat exchange system is opened, a bypass adjusting valve 18 is closed, a circulating water pump 13 is started, and the fresh water in the circulating water tank 8 is pumped to all positions of the on-board heat exchange system.
After the water in the circulating water tank 8 is pumped to all parts of the on-board heat exchange system, the circulating water tank 8 is basically emptied, the circulating water tank 8 is filled with fresh water according to the water supplementing operation again, the fresh water in the circulating water tank 8 is pumped to all parts of the on-board heat exchange system until the whole on-board heat exchange system is filled with fresh water, and at the moment, the ventilation valve 17 at the top of the circulating water tank is closed to form a closed on-board heat exchange system.
Before the gas turbine is started, the intercooling system is put into operation. And stop valves at all parts of the heat exchange system on the machine are sequentially started, so that the system loop is ensured to be smooth. And (4) starting the circulating water pump 13 at a low frequency, and reading the fresh water flow of the on-machine heat exchange system through a flowmeter after the system is stable. And opening a mixing water pump 5 of the external cooling system, sucking seawater, enabling the seawater to enter an external heat exchanger 6 through a filter 3, cooling the fresh water passing through the high-temperature and high-pressure air, and reading the system flow through a flowmeter 4. The fresh water is recycled after being reduced to a certain temperature. The seawater flows through the heat exchanger 6 and then flows into the sea again. And finishing the starting operation of the intercooling system.
The fresh water flow adjustment of the on-board heat exchange system under different working conditions of the gas turbine can be realized by the embodiment. Fresh water flow regulation can be realized by two methods: the fresh water flow can be adjusted by adjusting the working frequency of the circulating water pump 13 firstly, and then the fresh water pipeline entering the intercooler 19 is communicated with the fresh water pipeline exiting the intercooler 19 and is provided with the bypass adjusting valve 18, so that the fresh water flow entering the intercooler 19 can be realized by adjusting the bypass adjusting valve 18 under the condition of not changing the working frequency of the circulating water pump 13. Through the two measures, the fresh water flow of the on-board heat exchange system is adjusted in a large range.
This embodiment can realize different heat transfer temperature in order to satisfy the heat transfer demand of unit in two circulation system. Firstly, a three-way regulating valve 20 is arranged on a fresh water pipeline in front of the external heat exchanger 6, and part of fresh water can enter the external heat exchanger 6 and directly return to the circulating water tank 8 by regulating the opening degree of the three-way regulating valve 20, so that the outlet temperature of the circulating water tank 8 is regulated. In the cooling system outside the machine, a three-way regulating valve 7 is arranged at the seawater side outlet of the heat exchanger 6 outside the machine, and by regulating the opening degree of the three-way regulating valve 7, part of seawater after heat exchange returns to the mixing water tank 2, and part of seawater is directly discharged into the sea, so that the seawater temperature of the mixing water tank 2 is regulated.
Set up a safety relief valve 16 on the fresh water pipeline behind circulating water pump, when the heat transfer system appears the valve and closes the scheduling problem unusually when the machine, because circulating water pump 13 is still continuously working, can lead to the fresh water pressure in the front of intercooler 19 to promote in the twinkling of an eye, when pressure exceedes the upper limit value, safety relief valve 16 opens and discharges the interior fresh water of system, prevents that circulating water pump 13 from damaging.
When the machine heat exchange system needs to be cleaned and maintained, fresh water in the system can be discharged to the sewage tank through the blowdown valve 9, or fresh water can be pumped back to the water replenishing tank 15 from the circulating water tank 8 by closing the electric stop valve 11 of the water replenishing system, opening the manual stop valve 10 and starting the circulating water pump 12.
Example 2:
the present embodiment is based on embodiment 1, and the technical solution is basically the same as embodiment 1, except that:
the on-board heat exchange system is a closed circulation system, negative pressure of a certain degree can be generated in the system when the system is operated in a large flow mode after fresh water is full of the system, the electric stop valve 11 can be opened and the manual stop valve 10 can be closed when the system is operated, and due to the fact that the negative pressure exists in the on-board heat exchange system, the system can suck partial fresh water from the water replenishing tank 15 through the water replenishing pipeline to enter so as to offset the negative pressure, and meanwhile the maximum fresh water flow of the on-board heat exchange system is increased.
In conclusion, the invention discloses a variable-flow and variable-temperature double-loop closed circulation intercooling system which comprises a water replenishing system, an on-board heat exchange system and an off-board cooling system. The indirect cooling system adopts a closed double-circulation system, so that the indirect cooling system can be continuously used for a long time after being filled with fresh water, and the stability of each parameter of the indirect cooling system during long-time operation is ensured; the indirect cooling system is fully combined with actual conditions during ocean work, fresh water circulation is adopted in the on-board heat exchange system, so that key components such as the indirect cooler are prevented from rusting when working for a long time, the off-board cooling system directly sucks seawater as cooling water through the ocean, and the off-board heat exchanger exchanges heat with the fresh water and then directly discharges the seawater. The system provides two methods to realize the large-range adjustment of the fresh water flow of the on-board heat exchange system of the gas turbine under different working conditions. The indirect cooling system provides two modes to realize different heat exchange temperature regulation of the double circulation system so as to meet the requirement of the gas turbine. The fresh water flow regulating range is wide, the heat exchange requirements of the gas turbine under various working conditions can be met, the working conditions of the ocean are simulated, the external cooling system can be taken from the seawater, used and discharged, too many heat exchange devices and storage devices are prevented from being introduced, the structure is simple and compact, the operability is strong, and safety and maintenance are considered at the same time.
Claims (6)
1. The utility model provides a gas turbine variable flow and variable temperature double circuit closed cycle intercooling system which characterized in that: the system comprises a water supplementing system, an on-board heat exchange system and an off-board cooling system, wherein the on-board heat exchange system provides cold fresh water with stable flow and continuously flows through an intercooler, high-temperature and high-pressure air from a certain stage of compressor is cooled to a certain temperature through the intercooler, the fresh water heated by the high-temperature and high-pressure air flows through an off-board heat exchanger and exchanges heat with cooling water provided by the off-board cooling system, and flows back to a circulating water tank again after the temperature is reduced to an initial temperature, and then is pumped to the intercooler by a circulating water pump to form closed circulation of the on-board heat exchange system.
2. The variable flow and variable temperature dual-circuit closed-cycle indirect cooling system of a gas turbine as claimed in claim 1, wherein: the on-board heat exchange system comprises a circulating water tank, a variable-frequency circulating water pump, a stop valve, a safety relief valve, a discharge valve, an intercooler, a bypass regulating valve, a three-way regulating valve, a flowmeter, an off-board heat exchanger, a pressure sensor, a temperature sensor and a liquid level meter; the fresh water pipeline behind the circulating water pump is provided with a safety relief valve, when the problem of abnormal closing of a valve occurs in an upper heat exchange system, the pressure of the fresh water in front of the intercooler is instantly increased due to the fact that the circulating water pump still works continuously, when the pressure exceeds an upper limit value, the safety relief valve is opened to discharge the fresh water in the system, the circulating water pump is prevented from being damaged, the fresh water in the system is discharged to a sewage tank through a drain valve, or the fresh water in the system is pumped back to a water supplementing tank from the circulating water tank by closing an electric stop valve of the water supplementing system, opening a manual stop valve and opening the circulating water pump; and pumping a water in the circulating water tank to each part of the on-board heat exchange system, basically emptying the circulating water tank, replenishing fresh water to the circulating water tank according to the water replenishing operation, pumping the fresh water in the circulating water tank to each part of the on-board heat exchange system until the whole on-board heat exchange system is filled with fresh water, and closing a vent valve at the top of the circulating water tank to form a closed on-board heat exchange system.
3. The variable flow and variable temperature dual-circuit closed-cycle indirect cooling system of a gas turbine as claimed in claim 2, wherein: the water supplementing system comprises a water supplementing tank, a water supplementing pump, a manual stop valve, an electric stop valve, a discharge valve and a liquid level meter; opening water charging system's electronic stop valve, close manual stop valve, open the vent valve at circulating water tank top, close quick-witted last heat transfer system's stop valve, start the moisturizing pump, replenish fresh water to circulating water tank from the moisturizing tank, whether stop supplying water according to the level gauge feedback display on the circulating water tank, after filling up circulating water tank with fresh water, close all valves of moisturizing system, open quick-witted last heat transfer system's stop valve, close the bypass governing valve, start circulating water pump, with fresh water pump to quick-witted heat transfer system everywhere in the circulating water tank, carry out the moisturizing to circulating water tank through the moisturizing system, for preventing inside and intercooler part corrosion of system, use fresh water in the moisturizing box.
4. The variable flow and variable temperature dual-circuit closed-cycle indirect cooling system of a gas turbine as claimed in claim 3, wherein: the external cooling system comprises a cooling mixing water tank, a pre-pump filter, a flowmeter, a mixing water pump, a three-way regulating valve, a temperature sensor and a liquid level meter, wherein the three-way regulating valve is arranged on a fresh water pipeline in front of the external heat exchanger, part of fresh water can enter the external heat exchanger by regulating the opening degree of the three-way regulating valve, and directly returns to the circulating water tank, so that the outlet temperature of the circulating water tank is regulated.
5. The gas turbine variable flow and variable temperature dual circuit closed cycle indirect cooling system of any of claims 1 to 4, wherein: the indirect cooling system is put into operation before the gas turbine is started, the circulating water pump is started at low frequency, the fresh water flow of the on-machine heat exchange system is read out through the flowmeter after the system is stabilized, the mixing water pump of the off-machine cooling system is started, seawater is continuously sucked in and enters the off-machine heat exchanger through the filter, the fresh water heat exchange after the high-temperature and high-pressure air is cooled through the flow is realized, and the system flow is read out through the flowmeter; the seawater flows into the sea again after flowing through the heat exchanger; and finishing the starting operation of the intercooling system.
6. The gas turbine variable flow and variable temperature dual circuit closed cycle indirect cooling system of any of claims 1 to 4, wherein: the system provides two kinds of fresh water flow adjusting modes for realizing the on-board heat exchange system of the gas turbine under different working conditions on a large scale: the fresh water flow can be adjusted by adjusting the working frequency of the circulating water pump, the fresh water pipeline entering the intercooler and the fresh water pipeline flowing out of the intercooler are communicated and provided with a bypass adjusting valve, and the fresh water flow flowing into the intercooler is achieved by adjusting the bypass adjusting valve under the condition that the working frequency of the circulating water pump is not changed.
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Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4000617A (en) * | 1975-01-27 | 1977-01-04 | General Atomic Company | Closed cycle gas turbine system |
| US4037413A (en) * | 1974-12-09 | 1977-07-26 | Energiagazdalkodasi Intezet | Power plant with a closed cycle comprising a gas turbine and a work gas cooling heat exchanger |
| GB1504395A (en) * | 1975-06-27 | 1978-03-22 | Daikin Ind Ltd | Environmental control systems |
| US4148191A (en) * | 1975-12-23 | 1979-04-10 | Bbc Brown, Boveri & Company Limited | Method for regulating the power output of a thermodynamic system operating on a closed gas cycle and apparatus for carrying out the method |
| GB9622403D0 (en) * | 1995-11-17 | 1997-01-08 | Stankovic Branko | Closed combined cycle with high-temperature exhaust gas |
| US6112544A (en) * | 1997-07-24 | 2000-09-05 | Abb Alstom Power (Switzerland) Ltd | Generator cooling system |
| JP2003049608A (en) * | 2001-08-06 | 2003-02-21 | Mitsubishi Heavy Ind Ltd | Make-up water supply device |
| CN201367941Y (en) * | 2009-03-20 | 2009-12-23 | 武汉东测科技有限责任公司 | Novel engine coolant temperature control device |
| CN101968401A (en) * | 2009-07-28 | 2011-02-09 | 北汽福田汽车股份有限公司 | Cooling fluid temperature control system for testing engine performance |
| US20130036736A1 (en) * | 2009-09-17 | 2013-02-14 | Echogen Power System, LLC | Automated mass management control |
| CN105807803A (en) * | 2014-12-31 | 2016-07-27 | 国家电网公司 | Closed-type cooling system for fuel gas thermal power plant, and starting/stopping control method for closed-type cooling system |
| CN110332826A (en) * | 2019-08-20 | 2019-10-15 | 中国船舶重工集团公司第七0三研究所 | Based on SAPMAC method marine gas turbine seawater heat exchanger between fixed temperature blending system |
| CN111483583A (en) * | 2020-04-14 | 2020-08-04 | 中国舰船研究设计中心 | Variable working condition adjusting system and method for two-loop cooling water system |
| CN112145406A (en) * | 2020-06-28 | 2020-12-29 | 中国舰船研究设计中心 | Energy-saving control method for sea water pump of central cooling system |
| CN113431682A (en) * | 2021-05-27 | 2021-09-24 | 中国舰船研究设计中心 | Inlet air temperature adjusting system and method for marine gas turbine |
| CN214945267U (en) * | 2021-05-19 | 2021-11-30 | 北京京能电力股份有限公司 | Furnace water circulating pump motor cooling device |
-
2021
- 2021-12-13 CN CN202111520021.2A patent/CN114233477B/en active Active
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4037413A (en) * | 1974-12-09 | 1977-07-26 | Energiagazdalkodasi Intezet | Power plant with a closed cycle comprising a gas turbine and a work gas cooling heat exchanger |
| US4000617A (en) * | 1975-01-27 | 1977-01-04 | General Atomic Company | Closed cycle gas turbine system |
| GB1504395A (en) * | 1975-06-27 | 1978-03-22 | Daikin Ind Ltd | Environmental control systems |
| US4148191A (en) * | 1975-12-23 | 1979-04-10 | Bbc Brown, Boveri & Company Limited | Method for regulating the power output of a thermodynamic system operating on a closed gas cycle and apparatus for carrying out the method |
| GB9622403D0 (en) * | 1995-11-17 | 1997-01-08 | Stankovic Branko | Closed combined cycle with high-temperature exhaust gas |
| US6112544A (en) * | 1997-07-24 | 2000-09-05 | Abb Alstom Power (Switzerland) Ltd | Generator cooling system |
| JP2003049608A (en) * | 2001-08-06 | 2003-02-21 | Mitsubishi Heavy Ind Ltd | Make-up water supply device |
| CN201367941Y (en) * | 2009-03-20 | 2009-12-23 | 武汉东测科技有限责任公司 | Novel engine coolant temperature control device |
| CN101968401A (en) * | 2009-07-28 | 2011-02-09 | 北汽福田汽车股份有限公司 | Cooling fluid temperature control system for testing engine performance |
| US20130036736A1 (en) * | 2009-09-17 | 2013-02-14 | Echogen Power System, LLC | Automated mass management control |
| CN105807803A (en) * | 2014-12-31 | 2016-07-27 | 国家电网公司 | Closed-type cooling system for fuel gas thermal power plant, and starting/stopping control method for closed-type cooling system |
| CN110332826A (en) * | 2019-08-20 | 2019-10-15 | 中国船舶重工集团公司第七0三研究所 | Based on SAPMAC method marine gas turbine seawater heat exchanger between fixed temperature blending system |
| CN111483583A (en) * | 2020-04-14 | 2020-08-04 | 中国舰船研究设计中心 | Variable working condition adjusting system and method for two-loop cooling water system |
| CN112145406A (en) * | 2020-06-28 | 2020-12-29 | 中国舰船研究设计中心 | Energy-saving control method for sea water pump of central cooling system |
| CN214945267U (en) * | 2021-05-19 | 2021-11-30 | 北京京能电力股份有限公司 | Furnace water circulating pump motor cooling device |
| CN113431682A (en) * | 2021-05-27 | 2021-09-24 | 中国舰船研究设计中心 | Inlet air temperature adjusting system and method for marine gas turbine |
Non-Patent Citations (4)
| Title |
|---|
| 喻娜;李峰;周科;冉旭;初晓;张晓华;: "补水箱水装量对非能动余热排出系统运行的影响分析", 核科学与工程, no. 06, pages 746 - 750 * |
| 李徐嘉;敖晨阳;刘云生;: "舰用间冷循环燃气轮机间冷器失效性能分析", 舰船科学技术, no. 12, pages 386 - 387 * |
| 李贝贝;庄重;张智博;: "氦气轮机直接循环系统板翅式回热器设计", 舰船科学技术, no. 13, pages 120 - 124 * |
| 高鹏;董威;: "舰船燃气轮机间冷系统流动参数优化分析", 航空发动机, no. 04, pages 29 - 32 * |
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