CN216477509U - System for generating power by using waste heat of ship desulfurization pre-cooling water - Google Patents
System for generating power by using waste heat of ship desulfurization pre-cooling water Download PDFInfo
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- CN216477509U CN216477509U CN202122349725.XU CN202122349725U CN216477509U CN 216477509 U CN216477509 U CN 216477509U CN 202122349725 U CN202122349725 U CN 202122349725U CN 216477509 U CN216477509 U CN 216477509U
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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- Y02T10/12—Improving ICE efficiencies
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Abstract
The utility model discloses a system for generating power by utilizing waste heat of ship desulfurization pre-cooling water, which is based on the arrangement of a pre-cooling spraying system, wherein an evaporator is communicated with an outlet at the lower end of an air inlet throat; the evaporator is communicated with a working pump, the working pump is communicated with a liquid storage tank, and liquid working media are contained in the liquid storage tank; the evaporator is communicated with an expansion generator at an outlet of the gaseous working medium, the liquid working medium is heated into the gaseous working medium by the waste heat of the pre-cooling spraying wastewater generated by the pre-cooling spraying system, and the gaseous working medium is used as an expanding agent to drive the expansion generator to generate power in the expansion generator. This novel waste heat that utilizes cooling spray waste water in advance generates electricity, has improved the utilization efficiency of energy, has effectively practiced thrift the fuel cost in addition. Meanwhile, the problem of overhigh back pressure of the desulfurization system cannot be caused by the assembly of the power supply system, so that the waste gas treatment effect of the desulfurization system is effectively ensured, and the requirement of low-sulfur emission is met.
Description
Technical Field
The utility model relates to a power generation system and a method, in particular to a system for generating power by using waste heat of desulfurization and pre-cooling water of a ship.
Background
A ship is a transportation tool with high energy consumption, and meanwhile, the operation of the ship is accompanied with serious environmental pollution problems. At present, EEDI (new ship energy efficiency design index) becomes an index for examining the energy consumption of ship operation, and for the problem of low energy utilization efficiency of the ship, in addition to high fuel cost, extra penalty is faced to compensate the damage to the environment.
At present, ship desulfurization systems are assembled on a large number of ships, and the desulfurization systems are used for treating waste gas generated by combustion of diesel engine fuel by a ship main engine. In the process of treating high-temperature waste gas by a desulfurization system, a large amount of waste heat can be formed, so that how to effectively improve the utilization efficiency of the waste heat is one of important ways for improving the self competitiveness of the ship manufacturing industry; if the waste heat cannot be fully utilized, the fuel cost is further improved, and the utilization efficiency of energy is reduced; therefore, in order to effectively reduce the energy consumption index of ship operation, a power generation system capable of fully desulfurizing and pre-cooling water waste heat of a ship is urgently needed.
SUMMERY OF THE UTILITY MODEL
In order to solve the defects of the technology, the utility model provides a system for generating power by using the waste heat of the desulphurization pre-cooling water of the ship.
In order to solve the technical problems, the utility model adopts the technical scheme that: a system for generating power by using waste heat of ship desulfurization pre-cooling water is arranged based on a pre-cooling spraying system, wherein the pre-cooling spraying system is positioned in an air inlet throat at one side of a desulfurization tower; the power generation system comprises an evaporator, an expansion generator and a working medium pump;
the inlet throat is communicated with the evaporator at the outlet at the lower end; the evaporator is communicated with a working pump, the working pump is communicated with a liquid storage tank, and liquid working media are contained in the liquid storage tank; the evaporator is communicated with an expansion generator at an outlet of the gaseous working medium, the liquid working medium is heated into the gaseous working medium by the waste heat of the pre-cooling spraying wastewater generated by the pre-cooling spraying system, and the gaseous working medium is used as an expanding agent to drive the expansion generator to generate electricity in the expansion generator.
Furthermore, the rear end of the expansion generator is communicated with a condenser, the condenser is communicated with a seawater pump, and the condenser is also communicated with a liquid storage tank.
Furthermore, the evaporator is communicated with a heat exchanger at a water outlet of the pre-cooling spraying wastewater, and the seawater pump is communicated with the pre-cooling spraying system through the heat exchanger.
Furthermore, a desulfurizing tower exhaust port is arranged at the top of the desulfurizing tower, and a desulfurizing tower air inlet is arranged at the top of the air inlet throat.
The utility model discloses a system for generating power by utilizing waste heat of desulfurization pre-cooling water of a ship, wherein pre-cooling spray wastewater of a pre-cooling spray system in the desulfurization system is connected into a waste heat power generation system, so that the waste heat power generation system and the desulfurization system are assembled on the ship at the same time, the power generation system generates power by utilizing the waste heat of the pre-cooling spray wastewater, and electric energy generated by the power generation system can be used for running work of the ship, so that the utilization efficiency of energy is improved, and the fuel cost is effectively saved. Simultaneously, the waste heat that the waste water was sprayed in the cooling in advance still is used for preheating of the shower water that cooling in advance spraying system used, and this power supply system's assembly can not cause the too high problem of desulfurization system backpressure, and then effectively ensures desulfurization system's exhaust-gas treatment effect to satisfy the requirement that low sulphur discharges.
Drawings
FIG. 1 is a schematic diagram of the system connection relationship of the present invention.
1. A condenser; 2. an expansion generator; 3. an evaporator; 4. a pre-cooling spray system; 5. a desulfurizing tower gas inlet; 6. a desulfurizing tower exhaust port; 7. a spray system; 8. a sea water pump; 9. a heat exchanger; 10. a working medium pump; 11. a liquid storage tank; 12. a desulfurizing tower.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
A system for generating power by using the waste heat of desulfurization pre-cooling water of a ship is designed based on a pre-cooling spraying system 4 on the existing ship, as shown in figure 1, the pre-cooling spraying system 4 needs to be matched with a spraying system 7 for use; the spraying system 7 is positioned in the desulfurizing tower 12, one side of the desulfurizing tower 12 is communicated with an air inlet throat, and the pre-cooling spraying system 4 is positioned in the air inlet throat;
the power generation system comprises an evaporator 3, an expansion generator 2, a condenser 1, a working medium pump 10 and a seawater pump 8; firstly, an air inlet throat is communicated with an evaporator 3 at a lower end outlet, meanwhile, the evaporator 3 is communicated with a working pump 10, and the working pump 10 is communicated with a liquid storage tank 11; pre-cooling spray water generated by the pre-cooling spray system 4 flows into the evaporator 3 through an outlet at the lower end of the air inlet throat, pre-cooling spray wastewater containing waste heat enters the evaporator 3, and meanwhile, a working medium pump 10 pumps liquid working medium in the liquid storage tank 11 and pumps the liquid working medium into the evaporator 3 to exchange heat with the pre-cooling spray wastewater containing the waste heat; the liquid working medium absorbs heat and then becomes a gaseous working medium, the evaporator 3 is communicated with the expansion generator 2 at the outlet of the gaseous working medium, and the gaseous working medium is used as an expanding agent to drive the expansion generator 2 to generate electricity in the expansion generator 2.
The gas working medium is cooled and depressurized after acting, the gas working medium is in a gas-liquid two-phase state, the expansion generator 2 is further communicated with the condenser 1, the gas-liquid two-phase working medium enters the condenser 1 to exchange heat with seawater pumped into the condenser 1 by the seawater pump 8, at the moment, the working medium is completely condensed into a liquid phase, enters the liquid storage tank 11, and is pumped by the working medium pump 10 again for the next cycle.
For the pre-cooling spray wastewater in the evaporator 3, because the heat is absorbed by the liquid working medium, the temperature can be reduced, but still the pre-cooling spray wastewater still contains the waste heat which is not utilized, in order to further fully utilize the waste heat, the evaporator 3 is communicated with a heat exchanger 9 at the water outlet of the pre-cooling spray wastewater, the heat exchanger 9 is communicated with the pre-cooling spray system 4 and is communicated with a seawater pump 8, therefore, the pre-cooling spray wastewater flowing out of the evaporator 3 enters the heat exchanger 9 to exchange heat with the seawater fed by the seawater pump 8, the seawater is heated after absorbing the heat and is used as the pre-cooling spray water of the pre-cooling spray system, the temperature of the pre-cooling spray water is higher than the normal seawater temperature used by the spray system, the problem of overhigh back pressure of the desulfurization system can not be caused, and the desulfurization spray effect of the desulfurization tower can be effectively ensured.
For the seawater pump 8, a water supply waterway is divided into three paths, one path is communicated with the spraying system 7, the other path is communicated with the pre-cooling spraying system 4 through the heat exchanger 9, and the other path is communicated with the condenser 1; high-temperature waste gas generated by the marine main engine firstly enters an air inlet throat of the desulfurizing tower 12 from an air inlet 5 of the desulfurizing tower, is firstly cooled by a pre-cooling spraying system 4 at the air inlet throat, then enters the desulfurizing tower 12 and is desulfurized by a spraying system 7, and finally is discharged from an exhaust port 6 of the desulfurizing tower.
The high-temperature waste gas generated by the host machine is primarily cooled by the pre-cooling spraying system 4, meanwhile, the pre-cooling spraying water absorbs the heat of the high-temperature waste gas to become pre-cooling spraying waste water, the pre-cooling spraying waste water contains a large amount of waste heat, and if the pre-cooling spraying waste water is directly discharged, serious waste of energy can be caused.
A method for generating power by using the waste heat of the desulfurization and pre-cooling water of a ship is realized based on the power generation system and specifically comprises the following steps: the pre-cooling spray wastewater is discharged from the lower end of an air inlet throat where an air inlet 5 of the desulfurizing tower is positioned and flows into the evaporator 3, and meanwhile, a working pump 10 sucks the liquid organic working medium in the liquid storage tank 11 and pumps the liquid organic working medium into the evaporator 3; the high-temperature pre-cooling spray wastewater and the low-temperature liquid organic work exchange heat in the evaporator 3, wherein the liquid organic working medium absorbs heat and is changed into a gaseous organic working medium; a large amount of heat is absorbed by the pre-cooling spray wastewater, so that the temperature is reduced;
the gaseous organic working medium further enters an expansion generator 2, the expansion generator 2 is an expansion machine and generator integrated machine, the gaseous organic working medium enters the expansion machine of the expansion generator, the pressure energy and the heat energy of the gaseous organic working medium are converted into mechanical energy, and the expansion machine is driven to drive the generator to convert the mechanical energy into electric energy; the temperature and pressure of the gas-state organic working medium after work is reduced, the gas-state organic working medium is in a gas-liquid two-phase state and enters the condenser 1 to exchange heat with seawater supplied by the seawater pump 8, the gas-liquid two-phase organic working medium is completely condensed into a liquid phase and enters the liquid storage tank 11 to realize the recycling of the condensed liquid working medium, and the liquid working medium is pumped into the evaporator 3 again by the working medium pump 10 to perform the next work-doing cycle.
The pre-cooling spraying wastewater cooled in the evaporator 3 enters the heat exchanger 9 and exchanges heat with the seawater pumped by the seawater pump 8, and the seawater is preheated and then used for desulfurization spraying of the pre-cooling spraying system, so that the waste heat is recycled, the energy utilization efficiency is further improved, and the ensured desulfurization spraying effect is achieved.
Usually, the temperature of seawater pumped by the seawater pump 8 is about 32 ℃, the exhaust gas generated by the host is 220 ℃ high-temperature exhaust gas, the 220 ℃ high-temperature exhaust gas enters the air inlet throat through the air inlet 5 of the desulfurizing tower, and is primarily cooled by the pre-cooling spraying system, the pre-cooling spraying water absorbs a large amount of heat in the process of cooling the high-temperature exhaust gas, the temperature of the pre-cooling spraying water is raised to about 120 ℃, the pre-cooling spraying water is discharged from the lower end of the air inlet throat in the form of pre-cooling spraying wastewater, enters the evaporator to be heated by liquid organic working media, the temperature of the pre-cooling spraying wastewater is reduced to about 90 ℃ after heat exchange, the pre-cooling spraying water flows into the heat exchanger, and the pre-cooling spraying water pumped into the pre-cooling spraying system by the seawater pump 8 is preheated to 58 ℃, so that the pre-cooling spraying water is preheated, and the full utilization of waste heat is realized. And finally, converging the pre-sprayed wastewater in the heat exchanger with a wastewater discharge pipe of the desulfurizing tower, and discharging the wastewater to a drainage system.
The above embodiments are not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make variations, modifications, additions or substitutions within the technical scope of the present invention.
Claims (4)
1. A system for generating power by using the waste heat of ship desulfurization pre-cooling water is arranged based on a pre-cooling spraying system (4), wherein the pre-cooling spraying system (4) is positioned in an air inlet throat at one side of a desulfurization tower (12); the method is characterized in that: the power generation system comprises an evaporator (3), an expansion generator (2) and a working medium pump (10);
the inlet throat is communicated with the evaporator (3) at the outlet at the lower end; the evaporator (3) is communicated with a working medium pump (10), the working medium pump (10) is communicated with a liquid storage tank (11), and liquid working medium is contained in the liquid storage tank (11); the evaporator (3) is communicated with the expansion generator (2) at the outlet of the gaseous working medium, the liquid working medium is heated into the gaseous working medium by the waste heat of the pre-cooling spraying wastewater generated by the pre-cooling spraying system, and the gaseous working medium is used as an expanding agent to drive the expansion generator (2) to generate electricity in the expansion generator (2).
2. The system for generating power by using the waste heat of the desulfurization and pre-cooling water of the ship according to claim 1, wherein: the rear end of the expansion generator (2) is communicated with a condenser (1), the condenser (1) is communicated with a seawater pump (8), and the condenser (1) is also communicated with a liquid storage tank (11).
3. The system for generating power by using the waste heat of the desulfurization and pre-cooling water of the ship as claimed in claim 2, wherein: the evaporator (3) is communicated with a heat exchanger (9) at a water outlet of the pre-cooling spraying wastewater, and a seawater pump (8) is communicated with the pre-cooling spraying system (4) through the heat exchanger (9).
4. The system for generating power by using the waste heat of the ship desulfurization pre-cooling water as claimed in claim 3, wherein: and a desulfurizing tower exhaust port (6) is arranged at the top of the desulfurizing tower (12), and a desulfurizing tower air inlet (5) is arranged at the top of the air inlet throat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122349725.XU CN216477509U (en) | 2021-09-27 | 2021-09-27 | System for generating power by using waste heat of ship desulfurization pre-cooling water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122349725.XU CN216477509U (en) | 2021-09-27 | 2021-09-27 | System for generating power by using waste heat of ship desulfurization pre-cooling water |
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| CN216477509U true CN216477509U (en) | 2022-05-10 |
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| CN202122349725.XU Active CN216477509U (en) | 2021-09-27 | 2021-09-27 | System for generating power by using waste heat of ship desulfurization pre-cooling water |
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2021
- 2021-09-27 CN CN202122349725.XU patent/CN216477509U/en active Active
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