CN112392626A - Waste heat comprehensive energy recovery device for diesel engine - Google Patents
Waste heat comprehensive energy recovery device for diesel engine Download PDFInfo
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- CN112392626A CN112392626A CN202011209185.9A CN202011209185A CN112392626A CN 112392626 A CN112392626 A CN 112392626A CN 202011209185 A CN202011209185 A CN 202011209185A CN 112392626 A CN112392626 A CN 112392626A
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- heat exchanger
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G5/00—Profiting from waste heat of combustion engines, not otherwise provided for
- F02G5/02—Profiting from waste heat of exhaust gases
- F02G5/04—Profiting from waste heat of exhaust gases in combination with other waste heat from combustion engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N5/00—Exhaust or silencing apparatus combined or associated with devices profiting from exhaust energy
- F01N5/02—Exhaust or silencing apparatus combined or associated with devices profiting from exhaust energy the devices using heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B41/00—Engines characterised by special means for improving conversion of heat or pressure energy into mechanical power
- F02B41/02—Engines with prolonged expansion
- F02B41/10—Engines with prolonged expansion in exhaust turbines
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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
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Abstract
The utility model provides a waste heat comprehensive energy recovery device for diesel engine, belong to energy recovery technical field, during the use, water is at first after the pressurized air heat exchanger absorbs the heat, further absorb the flue gas heat in the reentrant flue gas heat exchanger, steam or the steam-water mixture that produces passes through the shower nozzle atomizing after, vaporize into vapor rapidly after mixing with the high temperature flue gas that comes from diesel engine exhaust manifold in the entering evaporimeter, the mixture of cigarette and vapor, on the one hand, drive exhaust gas turbo charger provides pressurized air for the diesel engine, on the other hand, drive power turbine does work, the energy that power turbine retrieved finally feeds back to the diesel engine output shaft through gear, can effectively utilize. The system can maximally recover the waste heat energy of the supercharged air, the lubricating oil and the exhaust smoke of the diesel engine, effectively reduce the exhaust temperature of the diesel engine, provide proper environment temperature for tail gas desulfurization of the diesel engine, increase the external output power of the diesel engine and reduce the fuel consumption rate of the diesel engine.
Description
Technical Field
The invention belongs to the technical field of energy recovery and utilization, and particularly relates to a waste heat comprehensive energy recovery device for a diesel engine.
Background
The thermal efficiency of the diesel engine is generally less than 50%, and most of the rest energy is discharged into the natural environment in a thermal energy mode. The waste heat resource is rich, especially for large and medium diesel engines, the single machine waste heat power is megawatt level, and the maximum single machine power can reach 80-100 megawatts. For large diesel engines, a plurality of large diesel engines are generally operated in parallel, such as land diesel engine power generation power station systems, marine diesel engine power systems and power station systems, marine platform power station systems and the like, 2 to 3 large diesel engines are operated in parallel, dozens of large diesel engines are operated in parallel, and the rest heat energy is very large. Therefore, if the waste heat resource can be effectively utilized, the energy-saving and emission-reducing effects can be achieved well, and the operation cost of the diesel engine is greatly reduced.
The existing methods and devices for recovering waste heat resources of diesel engines in the market are mainly divided into four types: firstly, converting waste heat energy into vapor through a heat exchanger, wherein the vapor with higher energy density can be used for heating, refrigerating, seawater desalting and the like; secondly, converting the waste heat of the diesel engine into electric energy through an organic Rankine cycle device; and thirdly, only part of waste heat energy of high-temperature and high-pressure smoke in a front exhaust main pipe of an exhaust turbine of the diesel engine, such as an exhaust turbocharger and an exhaust turbine generator of the diesel engine, is recovered. And fourthly, the diesel engine comprehensively utilizes waste heat resources by combining the three energy recovery modes to improve the energy utilization rate.
However, the above four ways of recovering waste heat energy each have their own drawbacks. The first one needs to be put into a waste heat boiler, which is generally large in size and used for heating, refrigeration, seawater desalination and the like, and the economy is limited by factors such as seasons, fresh water demand and the like, so that waste heat resources cannot be fully utilized. The cyclic power generation efficiency of the second organic Rankine cycle system is generally less than 10%, and the power generation efficiency is more greatly reduced after the power consumption of a cooling water pump and the power consumption of auxiliary electric equipment are taken into account; in addition, the system is complex, a high-speed motor is required to be used, special power transformation equipment and a system control device are selected, and meanwhile, the price of an organic working medium is high, so that the investment is high, the operation and maintenance cost is high, and numerous technical bottlenecks of sealing and controlling the system are in urgent need of breakthrough; third, although the system is simple, the turbocharger and the exhaust turbine generator use all the energy recovered by the diesel engine, and the device is not reviewed since the efficiency of the diesel engine is taken into account. The exhaust gas turbine generator set only uses the pressure energy and a small part of internal energy of exhaust gas discharged by the diesel engine, and in addition, the system firstly needs to ensure that the supercharger has enough exhaust gas to drive the exhaust gas turbine supercharger to normally operate, so that the normal operation of the diesel engine is ensured, and only under the high-load working condition of the diesel engine, abundant exhaust gas can be distributed to the exhaust gas turbine generator set for use. Therefore, the power of the unit is generally small, and the waste heat recovery energy is limited. If the generated electric energy needs to be used in a grid-connected mode, a power transformation system is complex, and investment is high. In view of the above-mentioned disadvantages, there is a need for improvement.
Disclosure of Invention
The technical problems solved by the invention are as follows: the invention provides a waste heat comprehensive energy recovery device for a diesel engine, which can provide sufficient driving smoke for a waste gas turbocharger, can comprehensively recover supercharged air and waste gas waste heat of the diesel engine under the condition of ensuring that the normal work of the diesel engine is not influenced, and can directly feed back the recovered energy to an output shaft of the diesel engine in a mechanical work mode, thereby reducing the oil consumption of the diesel engine and improving the shaft power of the diesel engine.
The technical scheme adopted by the invention is as follows: the waste heat comprehensive energy recovery device for the diesel engine comprises a waste gas turbocharger compressor and a waste gas turbocharger turbine which are used for providing fresh air for diesel oil, a water booster pump, a booster air heat exchanger and a flue gas heat exchanger for heating water, a control device for controlling the waste heat energy recovery device of the diesel engine, a power turbine for recovering the surplus waste gas energy of the diesel engine, a gear transmission device I and a gear transmission device II which transmit the mechanical work recovered by the power turbine to an output shaft of the diesel engine, and an evaporator which rapidly heats preheated steam or a steam-water mixture to superheated steam; the exhaust gas turbocharger turbine is coaxially connected with an exhaust gas turbocharger compressor, an air outlet of the exhaust gas turbocharger compressor is connected with an air inlet of a pressurized air heat exchanger, and an air outlet of the pressurized air heat exchanger is connected with an air inlet main pipe of the diesel engine; the liquid inlet of the pressurized air heat exchanger is connected with the water booster pump, the liquid outlet of the pressurized air heat exchanger is connected with the liquid inlet of the flue gas heat exchanger, and the liquid outlet of the flue gas heat exchanger is connected with the spray head in the evaporator; an outlet of a diesel engine smoke exhaust main pipe is connected with an air inlet of an evaporator through a control valve A, an air outlet of the evaporator is connected with an air inlet of a turbine of an exhaust gas turbocharger through a control valve C, and an exhaust port of the turbine of the exhaust gas turbocharger is connected with an air inlet of a smoke heat exchanger through a control valve E; the outlet of the diesel engine smoke exhaust main pipe is directly connected with the turbine air inlet of the exhaust gas turbocharger through a control valve B; the gas outlet of the evaporator is connected with the gas inlet of a power turbine through a control valve D, the gas outlet of the power turbine is connected with the gas inlet of the flue gas heat exchanger through a control valve F, the output of the power turbine is connected with the input of a gear transmission device I, the output of the gear transmission device I is connected with the input of a gear transmission device II through a clutch, and the output of the gear transmission device II is connected with the output shaft of the diesel engine; and the water booster pump, the control valve A, the control valve B, the control valve C, the control valve D, the control valve E and the control valve F are electrically connected with the control device.
In order to further limit the technical scheme, the booster air heat exchanger can also be a diesel engine lubricating oil heat exchanger or a heat exchanger formed by connecting the lubricating oil heat exchanger and the booster air heat exchanger in parallel or in series.
The technical scheme is further limited, two pipelines are arranged in front of the turbine of the exhaust gas turbocharger, wherein one pipeline is an air inlet pipeline which enters the power turbine after passing through the evaporator, and the other pipeline is a security bypass pipeline.
The technical scheme is further limited, and a solid garbage collecting structure and an automatic discharging and cleaning structure are arranged inside the evaporator.
In order to further limit the technical scheme, the gear transmission device I, the gear transmission device II and the lubricating oil system and the cooling system of the power turbine can share one set of lubricating oil and cooling system with the diesel engine.
The technical scheme is further limited, the exhaust gas turbocharger turbine and the power turbine are both provided with high-efficiency nozzle rings and can be driven by a mixed working medium consisting of flue gas and superheated steam.
Compared with the prior art, the invention has the advantages that:
1. when the scheme is used, water firstly passes through a pressurized air heat exchanger of a diesel engine exhaust gas turbocharger, absorbs heat, then enters a flue gas heat exchanger of the diesel engine to further absorb the heat of flue gas, generated steam or steam-water mixture is atomized through a spray head, enters a high-temperature evaporator in front of a power turbine set, is mixed with high-temperature flue gas from a diesel engine exhaust main pipe and then is quickly vaporized into steam and a mixture of the steam and the steam, on one hand, the exhaust gas turbocharger is driven to provide pressurized air for the diesel engine, on the other hand, the power turbine is driven to do work, and the energy recovered by the power turbine is finally fed back to an output shaft of the diesel engine through a gear transmission device, so that the energy; the system can recycle the waste heat energy of the diesel engine in a gradient manner and feed the recycled energy back to the output shaft of the diesel engine, can recycle the waste heat energy of the supercharged air, the lubricating oil and the smoke of the diesel engine to the maximum extent, can effectively reduce the smoke exhaust temperature of the diesel engine, provides proper environment temperature for the tail gas desulfurization of the diesel engine, increases the external output power of the diesel engine and reduces the fuel consumption rate of the diesel engine;
2. the system adopts environment-friendly working medium water as the working medium, is in open circulation, has no pollution to the environment, can use condensed water after the compressed air is cooled, condensed water generated in the air-conditioning refrigeration process of a ship or a power station system, condensed water in a refrigeration house, fresh water, rainwater and the like stored in a ballast tank of a ship which is directly transported to the river and the sea, and has low operation and maintenance cost;
3. the system adopts a gear transmission device to directly feed back the recovered waste heat energy to an output shaft of the diesel engine, and a secondary energy conversion process is avoided; in addition, the system adopts the design idea of energy cascade utilization, so that the comprehensive efficiency of the system is higher;
4. the system adopts a gear transmission device to directly feed back the recovered waste heat energy to an output shaft of the diesel engine, and has no complex facilities such as power distribution, power transformation, power generation and the like; in addition, the gear transmission device can use the lubricating oil of the diesel engine system, so that the auxiliary equipment is less, and the system is simple; because the used working medium is water, the sealing requirement on the system is relatively low, the problems of leakage, high pressure, sealing and the like of an organic working medium system do not need to be considered, the system can be designed by adopting common working parts such as a turbine, a valve and the like, the technical level requirement is not high, the system is easy to integrate with a diesel engine, the industrialization is easy to realize, and the manufacturing cost of the system is low.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation. The use of the phrase "comprising one of the elements" does not exclude the presence of other like elements in the process, method, article, or apparatus that comprises the element.
Referring to fig. 1, an embodiment of the present invention is described in detail.
The waste heat comprehensive energy recovery device for the diesel engine comprises a waste gas turbocharger compressor 5 for providing fresh air for diesel oil, a waste gas turbocharger turbine 6 for driving the waste gas turbocharger compressor 5 of the diesel engine, a water booster pump 3, a booster air heat exchanger 4 for heating water, a flue gas heat exchanger 8, a control device 10 for controlling the waste heat energy recovery device of the diesel engine, a power turbine 11 for recovering the surplus waste gas energy of the diesel engine, a gear transmission device I12 and a gear transmission device II 16 for transmitting the mechanical work recovered by the power turbine 11 to an output shaft 17 of the diesel engine, and an evaporator 14 for rapidly heating preheated water vapor or a water-vapor mixture to superheated water vapor.
The exhaust gas turbocharger turbine 6 is coaxially connected with the exhaust gas turbocharger compressor 5, the air outlet of the exhaust gas turbocharger compressor 5 is connected with the air inlet of the pressurized air heat exchanger 4, and the air outlet of the pressurized air heat exchanger 4 is connected with the diesel engine air inlet main pipe 1. The inlet of the booster air heat exchanger 4 is connected with the water booster pump 3, the outlet of the booster air heat exchanger 4 is connected with the inlet of the flue gas heat exchanger 8, and the outlet of the flue gas heat exchanger 8 is connected with the spray head 13 in the evaporator 14. The outlet of the diesel engine smoke exhaust main pipe 2 is connected with the air inlet of an evaporator 14 through a control valve A, the air outlet of the evaporator 14 is connected with the air inlet of an exhaust gas turbocharger turbine 6 through a control valve C, and the exhaust port of the exhaust gas turbocharger turbine 6 is connected with the air inlet of a smoke heat exchanger 8 through a control valve E. The outlet of the diesel engine smoke exhaust main pipe 2 is directly connected with the air inlet of the exhaust gas turbocharger turbine 6 through a control valve B. The gas outlet of the evaporator 14 is connected with the gas inlet of a power turbine 11 through a control valve D, the gas outlet of the power turbine 11 is connected with the gas inlet of a flue gas heat exchanger 8 through a control valve F, the output of the power turbine 11 is connected with the input of a gear transmission device I12, the output of the gear transmission device I12 is connected with the input of a gear transmission device II 16 through a clutch 15, and the clutch 15 is used for controlling whether the gear transmission devices work synchronously or not; the output of the gear transmission device II 16 is connected with an output shaft 17 of the diesel engine. The water booster pump 3, the control valve A, the control valve B, the control valve C, the control valve D, the control valve E and the control valve F are all electrically connected with the control device 10.
The water used by the device is generally fresh water, and if seawater is used, heat exchanger desalting and descaling equipment needs to be added in the pressurized air heat exchanger 4.
The working medium that this system adopted is environment-friendly working medium water, and the system is open circulation, and is pollution-free to the environment, can use the water of the condensation that produces when compressed air cooling is dry in addition, the water of congealing that produces among boats and ships or the power station system air conditioner refrigeration process, the freezer water of congealing, and the ship that reaches of river and sea can use the fresh water of its ballast tank storage, rainwater etc. consequently this system fortune dimension cost is lower. In addition, because the used working medium is water, the sealing requirement on the system is relatively low, the problems of leakage, high pressure, sealing and the like of an organic working medium system do not need to be considered, the system can be designed to adopt common working parts such as a turbine, a valve and the like, the technical level requirement is not high, the system is easy to integrate with a diesel engine, the industrialization is easy to realize, and the manufacturing cost of the system is low.
The booster air heat exchanger 4 can also be a diesel engine lubricating oil heat exchanger or a heat exchanger formed by connecting the lubricating oil heat exchanger and the booster air heat exchanger in parallel or in series.
The exhaust gas turbocharger air compressor is characterized in that an exhaust gas turbocharger air compressor air suction port 7 is arranged on the exhaust gas turbocharger air compressor 5, two pipelines are arranged in front of a turbine 6 of the exhaust gas turbocharger, one pipeline is an air inlet pipeline which enters a power turbine 11 after passing through an evaporator 14, the other pipeline is a safety bypass pipeline, and the pipelines are started when a waste heat recovery device is stopped using, so that the normal operation of the exhaust gas turbocharger is ensured, and the normal operation of a diesel engine is further ensured.
The evaporator 14 is internally provided with a solid garbage collection structure and an automatic discharge cleaning structure.
The lubricating oil system and the cooling system of the gear transmission device I12 and the gear transmission device II 16 power turbine 11 can share one set of lubricating oil and cooling system with the diesel engine, and the integration level of the system is improved.
And a chimney 9 for discharging the exhaust gas of the diesel engine is arranged at the upper part of the flue gas heat exchanger 8.
The exhaust gas turbocharger turbine 6 and the power turbine 11 both adopt a mixture of flue gas and superheated steam and are provided with high-efficiency nozzle rings, so that the waste heat energy of the flue gas can be recovered to the maximum extent, and the adverse effect on the normal operation of the diesel engine is avoided.
The system adopts a gear transmission device to directly feed back the recovered waste heat energy to an output shaft of the diesel engine, does not have a secondary energy conversion process, and does not have complex facilities such as power distribution, power transformation, power generation and the like; the system adopts the design idea of energy gradient utilization, so that the comprehensive efficiency of the system is higher. In addition, the gear transmission device can use lubricating oil of a diesel engine system, the auxiliary equipment is few, and the system is simple.
The system has three implementation modes:
embodiment 1: and the waste heat recovery system works normally.
When the waste heat recovery system normally works, the control valve A, the control valve C, the control valve D, the control valve E and the control valve F are opened, the control valve B is closed, smoke from the diesel engine smoke exhaust main pipe 2 enters the evaporator 14 through the control valve A, is mixed with high-temperature water or a steam-water mixture which is formed by the water booster pump 3 and is heated by the booster air heat exchanger 4 and the smoke heat exchanger 8, enters the evaporator 14 through the spray head 13, is mixed with high-temperature smoke in the evaporator 14 and is quickly evaporated into superheated steam, and a mixture of the superheated steam and the smoke is formed; a part of the gaseous mixture enters an exhaust gas turbocharger turbine 6 under the control of a control valve C, and drives a coaxial exhaust gas turbocharger compressor 5 to provide pressurized air for the diesel engine; the other path enters a power turbine 11 under the control of a control valve D, drives a gear transmission device I12 to work, and feeds back the energy recovered by the power turbine to an output shaft 17 of the diesel engine through a clutch 15 and a gear transmission device II 16; the clutch 15 of the gear transmission device is controlled by the control device 10, and when the output rotating speed of the gear transmission device I12 reaches the arrangement rotating speed, the control device 10 controls the clutch 15 to automatically arrange. Flue gas discharged by the exhaust gas turbocharger turbine 6 and the power turbine 11 enters the flue gas heater 8 through the control valve E and the control valve F to heat fresh water, and low-temperature flue gas after heat exchange is discharged to the atmosphere through the chimney 9.
The flow and the temperature of water in the system are controlled by the control device 10, and the requirement that the power turbine outputs maximum power to the outside under the condition that the diesel engine works normally is met.
According to the working conditions, the system can recover the waste heat energy of the supercharged air, the lubricating oil and the exhaust smoke of the diesel engine to the maximum extent, can effectively reduce the exhaust temperature of the diesel engine, provides proper environment temperature for the tail gas desulfurization of the diesel engine, increases the external output power of the diesel engine and reduces the fuel consumption rate of the diesel engine.
Embodiment 2: and (5) low-load operation condition of the diesel engine.
Under the control of the control device 10, the control valve a, the control valve C, and the control valve E are opened, the control valve B, the control valve D, and the control valve F are closed, the clutch 15 is disengaged, and the power turbine 11 is not operated in the low-load operating mode. High-temperature steam or a steam-water mixture formed after water flows through the water booster pump 3, the booster air heat exchanger 4 and the flue gas heat exchanger 8 is mixed and enters the evaporator 14 through the spray head 13, and is mixed with flue gas in the evaporator 14 to form a superheated steam-flue gas mixture, and the superheated steam-flue gas mixture only drives the diesel engine exhaust gas turbocharger to work, so that the pressure of the diesel engine booster air is increased, and the dynamic power response and the working efficiency of the diesel engine under partial load working conditions are improved. Flue gas discharged by the turbine 6 of the exhaust gas turbocharger enters the flue gas heater 8 through the control valve E to heat fresh water, and low-temperature flue gas after heat exchange is discharged to the atmosphere through the chimney 9.
The flow and the temperature of water in the system are controlled by the control device 10, so that the supercharged air pressure is as high as possible under the low-load working condition of the diesel engine, and the working capacity of the waste gas turbocharger is improved.
Embodiment 3: and (5) emergency working conditions.
When the waste heat recovery system fails to work, at the moment, under the control of the control device 10, the control valve A, the control valve C, the control valve D and the control valve F are closed, the control valve B and the control valve E are opened, the clutch 15 is disengaged, the system is recovered to the initial setting of the diesel engine, waste gas in the exhaust main pipe 2 of the diesel engine directly enters the turbine 6 of the waste gas turbocharger to drive the waste gas turbocharger to work, and the normal operation of the diesel engine is guaranteed.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (6)
1. A waste heat comprehensive energy recovery device for diesel engine, including being used for providing exhaust gas turbocharger compressor (5) and exhaust gas turbocharger turbine (6) of fresh air for diesel oil, its characterized in that: the device comprises a water booster pump (3), a boosted air heat exchanger (4) for heating water and a flue gas heat exchanger (8), a control device (10) for controlling a waste heat energy recovery device of the diesel engine, a power turbine (11) for recovering the excess waste gas energy of the diesel engine, a gear transmission device I (12) and a gear transmission device II (16) for transmitting the mechanical work recovered by the power turbine (11) to an output shaft (17) of the diesel engine, and an evaporator (14) for rapidly heating preheated steam or a steam-water mixture to superheated steam; the exhaust gas turbocharger turbine (6) is coaxially connected with the exhaust gas turbocharger compressor (5), the air outlet of the exhaust gas turbocharger compressor (5) is connected with the air inlet of the pressurized air heat exchanger (4), and the air outlet of the pressurized air heat exchanger (4) is connected with the diesel engine air inlet main pipe (1); a liquid inlet of the pressurized air heat exchanger (4) is connected with the water booster pump (3), a liquid outlet of the pressurized air heat exchanger (4) is connected with a liquid inlet of the flue gas heat exchanger (8), and a liquid outlet of the flue gas heat exchanger (8) is connected with a spray head (13) in the evaporator (14); an outlet of a diesel engine smoke exhaust main pipe (2) is connected with an air inlet of an evaporator (14) through a control valve A, an air outlet of the evaporator (14) is connected with an air inlet of an exhaust gas turbocharger turbine (6) through a control valve C, and an air outlet of the exhaust gas turbocharger turbine (6) is connected with an air inlet of a smoke heat exchanger (8) through a control valve E; the outlet of the diesel engine smoke exhaust main pipe (2) is directly connected with the air inlet of the exhaust gas turbocharger turbine (6) through a control valve B; the gas outlet of the evaporator (14) is connected with the gas inlet of a power turbine (11) through a control valve D, the gas outlet of the power turbine (11) is connected with the gas inlet of a flue gas heat exchanger (8) through a control valve F, the output of the power turbine (11) is connected with the input of a gear transmission device I (12), the output of the gear transmission device I (12) is connected with the input of a gear transmission device II (16) through a clutch (15), and the output of the gear transmission device II (16) is connected with a diesel engine output shaft (17); the water booster pump (3), the control valve A, the control valve B, the control valve C, the control valve D, the control valve E and the control valve F are all electrically connected with the control device (10).
2. The waste heat integrated energy recovery device for the diesel engine according to claim 1, characterized in that: the booster air heat exchanger (4) can also be a diesel engine lubricating oil heat exchanger or a heat exchanger formed by connecting the lubricating oil heat exchanger and the booster air heat exchanger in parallel or in series.
3. The waste heat integrated energy recovery device for the diesel engine according to claim 1, characterized in that: two pipelines are arranged in front of a turbine (6) of the exhaust gas turbocharger, wherein one pipeline is an air inlet pipeline which enters a power turbine (11) after passing through an evaporator (14), and the other pipeline is a security bypass pipeline.
4. The waste heat integrated energy recovery device for the diesel engine according to claim 1, characterized in that: the evaporator (14) is internally provided with a solid garbage collecting structure and an automatic discharging and cleaning structure.
5. The waste heat integrated energy recovery device for the diesel engine according to claim 1, characterized in that: the lubricating oil system and the cooling system of the gear transmission device I (12), the gear transmission device II (16) and the power turbine (11) can share one set of lubricating oil system and cooling system with the diesel engine.
6. The waste heat integrated energy recovery device for the diesel engine according to claim 1, characterized in that: the exhaust gas turbocharger turbine (6) and the power turbine (11) are both provided with high-efficiency nozzle rings and can be driven by a mixed working medium consisting of flue gas and superheated steam.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112923771A (en) * | 2021-04-02 | 2021-06-08 | 山东大学 | Wet flue gas source heat pump system capable of controlling spraying according to exhaust gas temperature |
| CN112923770A (en) * | 2021-04-02 | 2021-06-08 | 山东大学 | Novel wet flue gas source heat pump system for water collection, waste heat recovery and pollutant removal |
| CN113091477A (en) * | 2021-04-02 | 2021-07-09 | 山东大学 | Wet flue gas source heat pump system for controlling input flue gas pressure |
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| CN103967648A (en) * | 2014-05-21 | 2014-08-06 | 哈尔滨工程大学 | Comprehensive waste heat recovery system of ship low-speed diesel engine |
| CN106481375A (en) * | 2016-10-28 | 2017-03-08 | 哈尔滨工程大学 | A kind of marine low speed diesel residual heat comprehensive recovery system control method based on power |
| US20170260889A1 (en) * | 2016-03-08 | 2017-09-14 | Toyota Motor Engineering & Manufacturing North America, Inc. | Integrated waste heat recovery and motor assisted turbocharger system |
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2020
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103967648A (en) * | 2014-05-21 | 2014-08-06 | 哈尔滨工程大学 | Comprehensive waste heat recovery system of ship low-speed diesel engine |
| US20170260889A1 (en) * | 2016-03-08 | 2017-09-14 | Toyota Motor Engineering & Manufacturing North America, Inc. | Integrated waste heat recovery and motor assisted turbocharger system |
| CN106481375A (en) * | 2016-10-28 | 2017-03-08 | 哈尔滨工程大学 | A kind of marine low speed diesel residual heat comprehensive recovery system control method based on power |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112923771A (en) * | 2021-04-02 | 2021-06-08 | 山东大学 | Wet flue gas source heat pump system capable of controlling spraying according to exhaust gas temperature |
| CN112923770A (en) * | 2021-04-02 | 2021-06-08 | 山东大学 | Novel wet flue gas source heat pump system for water collection, waste heat recovery and pollutant removal |
| CN113091477A (en) * | 2021-04-02 | 2021-07-09 | 山东大学 | Wet flue gas source heat pump system for controlling input flue gas pressure |
| CN113091477B (en) * | 2021-04-02 | 2022-02-22 | 山东大学 | Wet flue gas source heat pump system for controlling input flue gas pressure |
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| CN112392626B (en) | 2023-05-16 |
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