CN109869231B - Low-nitrogen combustion system of marine gas turbine based on low-temperature multi-effect distillation method - Google Patents
Low-nitrogen combustion system of marine gas turbine based on low-temperature multi-effect distillation method Download PDFInfo
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- CN109869231B CN109869231B CN201910271953.4A CN201910271953A CN109869231B CN 109869231 B CN109869231 B CN 109869231B CN 201910271953 A CN201910271953 A CN 201910271953A CN 109869231 B CN109869231 B CN 109869231B
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- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
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Abstract
The invention discloses a low-nitrogen combustion system of a marine gas turbine based on a low-temperature multi-effect distillation method, which comprises a power output subsystem, a flue gas waste heat recovery subsystem, a seawater desalination subsystem and a steam generation subsystem, wherein the power output subsystem is connected with the flue gas waste heat recovery subsystem through a gas turbine, the flue gas waste heat recovery subsystem is connected with the seawater desalination subsystem through a condensate evaporator, the seawater desalination subsystem is connected with the steam generation subsystem through a first fresh water pump, and the flue gas waste heat recovery subsystem is connected with the steam generation subsystem through a steam superheater and a steam generator. The invention desalts seawater to prepare fresh water by a low-temperature multi-effect distillation method, solves the problem of a fresh water source of reinjection steam of the gas turbine, realizes the preparation of water vapor, reduces the emission of nitrogen oxides of the gas turbine, and has great economic benefit and ecological benefit.
Description
Technical Field
The invention relates to a low-nitrogen combustion system of a gas turbine, in particular to a low-nitrogen combustion system of a marine gas turbine based on a low-temperature multi-effect distillation method.
Background
The gas turbine is a rotary impeller type heat engine, which takes continuously flowing gas as a working medium and drives an impeller to rotate at high speed, and is an internal combustion type power machine for converting the energy of fuel into useful work. When the gas turbine works, the gas compressor continuously sucks air from the atmosphere and compresses the air, the compressed air enters the combustion chamber, is mixed with the sprayed fuel and then is combusted to form high-temperature gas, and then the high-temperature gas flows into the gas turbine to expand and do work to push the turbine impeller to rotate and output power outwards. Compared with conventional power devices such as steam engines, diesel engines and the like, the gas turbine has the advantages of high power density, high starting speed and the like, and therefore, the gas turbine is widely used in the fields of industrial production, ships and the like.
In addition, because the combustion temperature of the gas turbine is higher, the flue gas after doing work still has higher temperature, the exhaust temperature of the gas turbine can reach more than 500 ℃, if the flue gas is directly discharged without being treated, not only the pollution is generated to the atmosphere, but also a large amount of heat energy is wasted.
The operation characteristics of the gas turbine can be greatly improved by the reinjection steam gas turbine cycle, the application of the technology in the industrial power generation gas turbine is mature, but the technology is not applied to the ship gas turbine, because the reinjection steam needs to consume a large amount of fresh water, and the key technical bottleneck is that the problem of a water source for injecting the steam is not reasonably solved.
Disclosure of Invention
Aiming at the defects that a reliable fresh water source is difficult to provide for a steam reinjection system of a ship gas turbine in the prior art, and the like, the invention aims to solve the problem of providing the low-temperature multi-effect distillation method-based low-nitrogen combustion system of the ship gas turbine, which can realize seawater desalination, meet the fresh water requirement of reinjection steam of the gas turbine and reduce nitrogen oxide emission of the gas turbine.
In order to solve the technical problems, the invention adopts the technical scheme that:
the invention relates to a low-nitrogen combustion system of a marine gas turbine based on a low-temperature multi-effect distillation method, which comprises a power output subsystem, a flue gas waste heat recovery subsystem, a seawater desalination subsystem and a steam generation subsystem, wherein the power output subsystem is connected with the flue gas waste heat recovery subsystem through a gas turbine, the flue gas waste heat recovery subsystem is connected with the seawater desalination subsystem through a condensate evaporator, the seawater desalination subsystem is connected with the steam generation subsystem through a first fresh water pump, and the flue gas waste heat recovery subsystem is connected with the steam generation subsystem through a steam superheater and a steam generator.
The power output subsystem comprises an air compressor, a combustion chamber, a gas turbine and a transmission device, wherein an outlet of the air compressor is connected with an air inlet of the combustion chamber, a gas outlet of the combustion chamber is connected with a gas inlet of the gas turbine, and the gas turbine is coaxially connected with the transmission device.
The flue gas waste heat recovery subsystem comprises a gas turbine, a steam superheater, a steam generator and a condensate evaporator, wherein a flue gas outlet of the gas turbine is divided into two paths along the flow direction of flue gas, one path of flue gas outlet is connected with a flue gas side inlet of the condensate evaporator through a second flue gas flow regulating valve, the other path of flue gas outlet is connected with a flue gas side inlet of the steam generator through a first flue gas flow regulating valve, the flue gas side of the steam superheater is connected with the flue gas side inlet of the steam generator, a bypass branch is further arranged between the flue gas inlet of the flue gas flow regulating valve and the flue gas side outlet of the steam generator, and a flue gas bypass valve is arranged on the bypass branch.
The seawater desalination subsystem comprises a condensate water evaporator, a first seawater evaporator, a second seawater evaporator and a third seawater evaporator, wherein a condensate water side outlet of the condensate water evaporator is connected with a condensate side inlet of the first seawater evaporator, a condensate side outlet of the first seawater evaporator is connected with a condensate water side inlet of the condensate water evaporator through a condensate water circulating pump, an evaporation side outlet of the first seawater evaporator is connected with a condensate side inlet of the second seawater evaporator, an evaporation side outlet of the second seawater evaporator is connected with a condensate side inlet of the third seawater evaporator, an evaporation side outlet of the third seawater evaporator is connected with a condensate side inlet of a water vapor condenser, the condensate water side outlet of the water vapor condenser is divided into two paths in the flow direction, one path is connected with an inlet of a second fresh water pump, and the other path is connected with an inlet of the first fresh water pump.
The steam generation subsystem is formed by connecting an outlet of the first fresh water pump, a steam side of the steam generator, a steam side of the steam superheater and a steam inlet of the combustion chamber in series.
And the smoke bypass valve, the first smoke flow regulating valve and the second smoke flow regulating valve are all electric regulating valves.
The first seawater evaporator, the second seawater evaporator and the third seawater evaporator are all falling film evaporators.
The invention has the following beneficial effects and advantages:
1. the invention takes the flue gas discharged by the gas turbine as a heat source, and desalts the seawater to prepare the fresh water by a low-temperature multi-effect distillation method, thereby solving the problem of a fresh water source of reinjection steam of the gas turbine, realizing the preparation of the vapor, avoiding the waste of waste heat and improving the utilization efficiency of energy.
2. According to the invention, steam is reinjected through the gas turbine, so that the variable working condition performance of the gas turbine is improved, the content of nitrogen oxide in flue gas is reduced, the output of the gas turbine is improved, and the service life of the gas turbine is prolonged.
3. The invention adopts a low-temperature multi-effect distillation method to realize seawater desalination, can effectively avoid the scaling of inorganic salt of the heat exchange coil, reduces the cleaning difficulty of the heat exchanger and prolongs the service life of the device.
Drawings
FIG. 1 is a schematic diagram of a low-nitrogen combustion system of a marine gas turbine based on a low-temperature multi-effect distillation method.
Wherein, 1 is transmission, 2 is gas turbine, 3 is the combustion chamber, 4 is air compressor, 5 is the flue gas bypass valve, 6 is first flue gas flow governing valve, 7 is the steam superheater, 8 is the steam generator, 9 is first fresh water pump, 10 is dense sea water pump, 11 is second flue gas flow governing valve, 12 is the condensate water evaporimeter, 13 is the condensate water circulating pump, 14 is first sea water evaporimeter, 15 is the second sea water evaporimeter, 16 is the third sea water evaporimeter, 17 is the second fresh water pump, 18 is the vapor condenser, 19 is the sea water pump.
Detailed Description
The invention is further elucidated with reference to the accompanying drawings.
As shown in figure 1, the low-nitrogen combustion system of the marine gas turbine based on the low-temperature multi-effect distillation method comprises a power output subsystem, a flue gas waste heat recovery subsystem, a seawater desalination subsystem and a steam generation subsystem, wherein the power output subsystem is connected with the flue gas waste heat recovery subsystem through a gas turbine 2, the flue gas waste heat recovery subsystem is connected with the seawater desalination subsystem through a condensate evaporator 12, the seawater desalination subsystem is connected with the steam generation subsystem through a first fresh water pump 9, and the flue gas waste heat recovery subsystem is connected with the steam generation subsystem through a steam superheater 7 and a steam generator 8.
The power output subsystem comprises an air compressor 4, a combustion chamber 3, a gas turbine 2 and a transmission device 1, wherein an outlet of the air compressor 4 is connected with an air inlet of the combustion chamber 3, a gas outlet of the combustion chamber 3 is connected with a gas inlet of the gas turbine 2, and the gas turbine 2 is coaxially connected with the transmission device 1.
The flue gas waste heat recovery subsystem comprises a gas turbine 2, a steam superheater 7, a steam generator 8 and a condensate evaporator 12, wherein a flue gas outlet of the gas turbine 2 is divided into two paths along the flow direction of flue gas, one path is connected with a flue gas side inlet of the condensate evaporator 12 through a second flue gas flow regulating valve 11, the other path is connected with a flue gas side inlet of 8 of the steam generator through a first flue gas flow regulating valve 6, a flue gas side of the steam superheater 7 is connected with a flue gas side inlet of 8 of the steam generator, a bypass branch is further arranged between the flue gas inlet of the flue gas flow regulating valve 6 and the flue gas side outlet of the steam generator 8, and a flue gas bypass valve 5 is arranged on the bypass branch.
The seawater desalination subsystem comprises a condensate evaporator 12, a first seawater evaporator 14, a second seawater evaporator 15 and a third seawater evaporator 16, the condensed water side outlet of the condensed water evaporator 12 is connected with the condensed water side inlet of the first seawater evaporator 14, the condensed side outlet of the first seawater evaporator 14 is connected with the condensed water side inlet of the condensed water evaporator 12 through a condensed water circulating pump 13, the evaporation side outlet of the first seawater evaporator 14 is connected with the condensation side inlet of the second seawater evaporator 15, the evaporation side outlet of the second seawater evaporator 15 is connected with the condensation side inlet of the third seawater evaporator 16, the evaporation side outlet of the third seawater evaporator 16 is connected with the condensation side inlet of the water vapor condenser 18, the condensed water side outlet of the water vapor condenser 18 is divided into two paths in the flow direction, one path is connected with the inlet of the second fresh water pump 17, and the other path is connected with the inlet of the first fresh water pump 9.
The steam generation subsystem is formed by connecting an outlet of a first fresh water pump 9, a steam side of a steam generator 8, a steam side of a steam superheater 7 and a steam inlet of the combustion chamber 3 in series.
The flue gas bypass valve 5, the first flue gas flow regulating valve 6 and the second flue gas flow regulating valve 11 are all electric regulating valves.
The first seawater evaporator 14, the second seawater evaporator 15 and the third seawater evaporator 16 are all falling film evaporators.
The working process and principle of the invention are as follows:
the air compressed by the air compressor 4 enters the combustion chamber 3 to be mixed with fuel and water vapor and then combusted, and high-temperature and high-pressure gas is generated to push the gas turbine 2 to drive the transmission device 1 to output power outwards.
The seawater desalination subsystem absorbs the waste heat of the flue gas of the gas turbine by the condensate water evaporator 12, desalts the seawater by using the flue gas as a heat source through a low-temperature multi-effect distillation seawater desalination process to prepare fresh water, in the seawater desalination subsystem, the seawater undergoes multiple evaporation and condensation processes in the first seawater evaporator 14, the second seawater evaporator 15 and the third seawater evaporator 16 in sequence under a low-pressure environment, and finally generated steam is sent into the steam condenser 18 to exchange heat with the low-temperature seawater to prepare fresh water. Part of the prepared fresh water sequentially flows through a steam generator 8 and a steam superheater 7 by a first fresh water circulating pump 9 to become high-temperature high-pressure steam, and then enters a combustion chamber 3 to be mixed with air and fuel and then combusted.
In the process, the flue gas flow passing through the steam superheater 7, the steam generator 8 and the condensate evaporator 12 can be controlled by adjusting the opening degrees of the first flue gas flow regulating valve 6, the second flue gas flow regulating valve 11 and the flue gas bypass valve 5, and meanwhile, the number of the falling film evaporators can be properly increased according to the concentration of seawater and the demand of fresh water, so that the quality and the yield of the fresh water are improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and all technical solutions formed by equivalent substitutions or equivalent changes should be covered within the scope of the present invention.
Claims (3)
1. A low-nitrogen combustion system of a marine gas turbine based on a low-temperature multi-effect distillation method is characterized in that: the system comprises a power output subsystem, a flue gas waste heat recovery subsystem, a seawater desalination subsystem and a steam generation subsystem, wherein the power output subsystem is connected with the flue gas waste heat recovery subsystem through a gas turbine;
the power output subsystem comprises an air compressor, a combustion chamber, a gas turbine and a transmission device, wherein the outlet of the air compressor is connected with the air inlet of the combustion chamber, the gas outlet of the combustion chamber is connected with the gas inlet of the gas turbine, and the gas turbine is coaxially connected with the transmission device;
the flue gas waste heat recovery subsystem comprises a gas turbine, a steam superheater, a steam generator and a condensate evaporator, wherein a flue gas outlet of the gas turbine is divided into two paths along the flow direction of flue gas, one path is connected with a flue gas side inlet of the condensate evaporator through a second flue gas flow regulating valve, the other path is connected with a flue gas side inlet of the steam generator through a first flue gas flow regulating valve and the flue gas side of the steam superheater, a bypass branch is further arranged between the flue gas inlet of the flue gas flow regulating valve and the flue gas side outlet of the steam generator, and a flue gas bypass valve is arranged on the bypass branch;
the seawater desalination subsystem comprises a condensate water evaporator, a first seawater evaporator, a second seawater evaporator and a third seawater evaporator, wherein a condensate water side outlet of the condensate water evaporator is connected with a condensate side inlet of the first seawater evaporator, a condensate side outlet of the first seawater evaporator is connected with a condensate water side inlet of the condensate water evaporator through a condensate water circulating pump, an evaporation side outlet of the first seawater evaporator is connected with a condensate side inlet of the second seawater evaporator, an evaporation side outlet of the second seawater evaporator is connected with a condensate side inlet of the third seawater evaporator, an evaporation side outlet of the third seawater evaporator is connected with a condensate side inlet of a water vapor condenser, the condensate water side outlet of the water vapor condenser is divided into two paths in the flow direction, one path is connected with an inlet of a second fresh water pump, and the other path is connected with an inlet of the first fresh water pump;
the steam generation subsystem is formed by connecting an outlet of the first fresh water pump, a steam side of the steam generator, a steam side of the steam superheater and a steam inlet of the combustion chamber in series.
2. The marine gas turbine low-nitrogen combustion system based on the low-temperature multi-effect distillation method according to claim 1, characterized in that: and the smoke bypass valve, the first smoke flow regulating valve and the second smoke flow regulating valve are all electric regulating valves.
3. The marine gas turbine low-nitrogen combustion system based on the low-temperature multi-effect distillation method according to claim 1, characterized in that: the first seawater evaporator, the second seawater evaporator and the third seawater evaporator are all falling film evaporators.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910271953.4A CN109869231B (en) | 2019-04-04 | 2019-04-04 | Low-nitrogen combustion system of marine gas turbine based on low-temperature multi-effect distillation method |
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| CN201910271953.4A CN109869231B (en) | 2019-04-04 | 2019-04-04 | Low-nitrogen combustion system of marine gas turbine based on low-temperature multi-effect distillation method |
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| CN109869231A CN109869231A (en) | 2019-06-11 |
| CN109869231B true CN109869231B (en) | 2021-08-10 |
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| US11396469B2 (en) | 2020-12-29 | 2022-07-26 | Kuwait University | Zero pollution hybrid desalination and energy production system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5925223A (en) * | 1993-11-05 | 1999-07-20 | Simpson; Gary D. | Process for improving thermal efficiency while producing power and desalinating water |
| CN102992532A (en) * | 2012-12-25 | 2013-03-27 | 集美大学 | Air type immersing distillation-multiple-effect evaporation seawater desalting device and method |
| CN103115457A (en) * | 2013-02-26 | 2013-05-22 | 集美大学 | Cooling, heating, water supplying and power supplying combined system with flue gas heat gradient utilization function coupled with seawater desalination technology |
| CN105439233A (en) * | 2015-12-07 | 2016-03-30 | 集美大学 | Nuclear power plant and gas turbine combined electricity-water cogeneration system and method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5427741B2 (en) * | 2010-09-21 | 2014-02-26 | 株式会社日立製作所 | Multipurpose thermal power generation system |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5925223A (en) * | 1993-11-05 | 1999-07-20 | Simpson; Gary D. | Process for improving thermal efficiency while producing power and desalinating water |
| CN102992532A (en) * | 2012-12-25 | 2013-03-27 | 集美大学 | Air type immersing distillation-multiple-effect evaporation seawater desalting device and method |
| CN103115457A (en) * | 2013-02-26 | 2013-05-22 | 集美大学 | Cooling, heating, water supplying and power supplying combined system with flue gas heat gradient utilization function coupled with seawater desalination technology |
| CN105439233A (en) * | 2015-12-07 | 2016-03-30 | 集美大学 | Nuclear power plant and gas turbine combined electricity-water cogeneration system and method |
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Granted publication date: 20210810 |