CN115419524A - Exhaust gas recirculation system - Google Patents

Exhaust gas recirculation system Download PDF

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Publication number
CN115419524A
CN115419524A CN202211294710.0A CN202211294710A CN115419524A CN 115419524 A CN115419524 A CN 115419524A CN 202211294710 A CN202211294710 A CN 202211294710A CN 115419524 A CN115419524 A CN 115419524A
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CN
China
Prior art keywords
exhaust gas
recirculation system
gas recirculation
cabinet
engine
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Pending
Application number
CN202211294710.0A
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Chinese (zh)
Inventor
安丽
蔡少林
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China Shipbuilding Power Engineering Institute Co Ltd
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China Shipbuilding Power Engineering Institute Co Ltd
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Priority to CN202211294710.0A priority Critical patent/CN115419524A/en
Publication of CN115419524A publication Critical patent/CN115419524A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/35—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with means for cleaning or treating the recirculated gases, e.g. catalysts, condensate traps, particle filters or heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/51—EGR valves combined with other devices, e.g. with intake valves or compressors

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Exhaust-Gas Circulating Devices (AREA)

Abstract

The invention relates to the technical field of waste gas treatment, and particularly discloses a waste gas recirculation system which comprises an engine, an exhaust pipeline, a washing tower, a backpressure valve and a stop valve, wherein waste gas exhausted from an exhaust manifold of the engine can be conveyed to the exhaust pipeline, the exhaust pipeline is respectively communicated with the input end of the backpressure valve and the input end of the stop valve, the output end of the backpressure valve is used for being connected with a boiler, the output end of the stop valve is communicated with an air inlet of the washing tower, an air outlet of the washing tower is used for conveying gas to an air inlet manifold of the engine, gas exceeding rated pressure can enter the boiler under the action of the backpressure valve, the rest gas can enter the washing tower through the stop valve, harmful gas in the waste gas is removed through the washing tower and is cooled, the washed gas enters the air inlet manifold of the engine and is supplied to the engine for secondary combustion, so that the utilization rate of fuel is improved, meanwhile, the cost is lowered, and energy waste is reduced.

Description

Exhaust gas recirculation system
Technical Field
The invention relates to the technical field of waste gas treatment, in particular to a waste gas recirculation system.
Background
The exhaust gas recirculation technology is to recirculate a part of exhaust gas of the dual fuel engine to the main engine to work, thereby reducing the oxygen concentration in the combustion chamber, reducing the activity of combustion, and reducing the peak temperature in the combustion chamber, so that the compression ratio of the dual fuel engine can be improved, the oil consumption and the gas consumption can be further reduced, and the emission of NOx, CH4, GHG and the like can be reduced to a certain extent. Particularly, under the fuel mode of a dual-fuel host, the emission of NOx is reduced, and the emission standard of TierIII is reached.
The existing exhaust gas recirculation system generally cleans the exhaust gas and then directly enters a scavenging box or pumps a certain proportion of exhaust gas through a draught fan to carry out active exhaust gas recirculation. Taking an induced draft fan as an example, in the earlier patent with application number CN202111253472.4, an exhaust gas recirculation system is disclosed, in which exhaust gas at the exhaust port of an engine is introduced into a scrubber through the induced draft fan, and then sequentially enters the air inlet of the engine through an electric demister and a turbine to form exhaust gas recirculation. However, the cost of the induced draft fan is high, and the work needs to consume electric energy.
Disclosure of Invention
The invention aims to: the utility model provides an exhaust gas recirculation system to solve current exhaust gas recirculation system and adopt the draught fan to extract partial waste gas and make it get into recirculation, problem with high costs to and consume the problem of electric energy.
The present invention provides an exhaust gas recirculation system, comprising: engine, exhaust pipe and scrubbing tower, exhaust gas recirculation system still include back pressure valve and trip valve, the exhaust manifold exhaust waste gas of engine can be carried extremely exhaust pipe, exhaust pipe respectively with the input of back pressure valve with the input intercommunication of trip valve, the output of back pressure valve is used for connecting the boiler, the output of trip valve with the air inlet intercommunication of scrubbing tower, the gas vent of scrubbing tower is used for carrying gas extremely the air intake manifold of engine.
As a preferable mode of the exhaust gas recirculation system, the exhaust gas recirculation system further includes a flow rate adjustment valve for adjusting a flow rate of the gas delivered from the exhaust port of the scrubber to the intake manifold of the engine.
As a preferable mode of the exhaust gas recirculation system, the exhaust gas recirculation system further includes a first water drop separator for separating moisture from the gas delivered from the scrubber to an intake manifold of the engine.
As a preferred technical solution of the exhaust gas recirculation system, the exhaust gas recirculation system further comprises an exhaust gas economizer arranged between the cut-off valve and the scrubber, and the exhaust gas economizer is used for recovering heat energy in the exhaust gas flowing through.
As a preferable embodiment of the exhaust gas recirculation system, the exhaust gas recirculation system further includes:
a circulation tank for storing water;
the input end of the circulating pump is communicated with the circulating cabinet;
the output end of the circulating pump is communicated with the input end of the heat exchanger;
the spray nozzle, set up in the scrubbing tower, heat exchanger's output intercommunication the spray nozzle, the scrubbing tower is provided with first drain outlet, first drain outlet with the circulation cabinet intercommunication.
As the preferred technical scheme of exhaust gas recirculation system, the circulation cabinet still is equipped with the overflow mouth, exhaust gas recirculation system still includes:
the alkali liquor cabinet is used for storing alkali liquor;
the input end of the lye pump is communicated with the lye cabinet;
the overflow port is communicated with the neutralization cabinet, and the output end of the lye pump is communicated with the neutralization cabinet;
and the discharge cabinet is provided with a second liquid outlet which is communicated with the discharge cabinet.
As a preferable embodiment of the exhaust gas recirculation system, the exhaust gas recirculation system further includes:
a water treatment supply pump, an input end of the water treatment supply pump being communicated with the discharge cabinet;
the output end of the water treatment supply pump is communicated with the water treatment device, and the water treatment device is used for removing particulate matters and oil in water;
and the external water supply pipeline is connected with the water treatment device and is used for supplying water to an external water device.
As a preferable embodiment of the exhaust gas recirculation system, the exhaust gas recirculation system further includes an oil content meter disposed on the external water supply line, and the oil content meter is configured to measure an oil content in water flowing through.
As exhaust gas recirculation system's preferred technical scheme, exhaust gas recirculation system still includes the three-way valve, the three-way valve has input interface, first delivery outlet and second delivery outlet, input interface with first delivery outlet series connection in the external water supply pipeline, just input interface is located the upper reaches of first delivery outlet, the second delivery outlet intercommunication the cabinet of releasing, the three-way valve can make input interface with first delivery outlet with the alternative intercommunication of second delivery outlet.
As a preferred technical scheme of the exhaust gas recirculation system, the exhaust gas recirculation system also comprises a water replenishing pipeline which is communicated with the circulation cabinet and an external water supply pipeline.
The invention has the beneficial effects that:
the invention provides an exhaust gas recirculation system, which comprises an engine, an exhaust pipeline, a washing tower, a back pressure valve and a stop valve. The exhaust manifold of engine exhaust manifold exhaust can carry to the exhaust pipe, and the exhaust pipe communicates with the input of backpressure valve and the input of trip valve respectively, and the output of backpressure valve is used for connecting the boiler, and the output of trip valve communicates with the air inlet of scrubbing tower, and the gas vent of scrubbing tower is used for carrying gas to the intake manifold of engine. In the exhaust gas recirculation system, after exhaust gas discharged through an exhaust manifold of an engine enters an exhaust pipeline, gas exceeding rated pressure enters a boiler under the action of a back pressure valve, the rest gas can enter a washing tower through a stop valve, harmful gas in the exhaust gas is removed through the washing tower, the exhaust gas is cooled, and the washed gas enters an air inlet manifold of the engine and is supplied to the engine for secondary combustion, so that the utilization rate of fuel is improved. And, replace current draught fan through the backpressure valve, can effectively reduce the cost to reduce the energy waste.
Drawings
FIG. 1 is a schematic diagram of an exhaust gas recirculation system according to an embodiment of the present invention.
In the figure:
1. an engine; 2. an exhaust line; 3. a washing tower; 4. a back pressure valve; 5. a shut-off valve; 6. a boiler; 7. a flow regulating valve; 8. a first drop of water separator; 9. an exhaust gas economizer; 10. a circulating cabinet; 11. a circulation pump; 12. a heat exchanger; 13. a neutralization cabinet; 14. a discharge cabinet; 15. an alkali liquor cabinet; 16. an alkaline liquid pump; 17. a water treatment supply pump; 18. a water treatment device; 19. an external water supply line; 20. oil content metering; 21. a three-way valve; 22. water supply pipeline.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood 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.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Where the terms "first position" and "second position" are two different positions, and where a first feature is "over", "above" and "on" a second feature, it is intended that the first feature is directly over and obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the existing exhaust gas recirculation system, exhaust gas at an exhaust port of an engine is introduced into a scrubber through a fan and then sequentially enters an air inlet of the engine through an electric demister and a turbine to form exhaust gas recirculation. However, the cost of the induced draft fan is high, and the work needs to consume electric energy.
In view of the above, the present application provides an exhaust gas recirculation system to solve the above-mentioned problems. The exhaust gas recirculation system can be applied to the recirculation treatment of the exhaust gas of the dual-fuel marine engine.
As shown in fig. 1, the exhaust gas recirculation system includes an engine 1, an exhaust line 2, a scrubber 3, a back pressure valve 4, and a shut-off valve 5. Wherein, exhaust pipe 2 can be carried to exhaust pipe 2 to the exhaust manifold exhaust of engine 1, and exhaust pipe 2 communicates with the input of backpressure valve 4 and the input of trip valve 5 respectively, and the output of backpressure valve 4 is used for connecting boiler 6, and the output of trip valve 5 communicates with the air inlet of scrubbing tower 3, and the gas vent of scrubbing tower 3 is used for carrying gas to the air intake manifold of engine 1. In thatIn this exhaust gas recirculation system, after exhaust gas discharged through an exhaust manifold of an engine 1 enters an exhaust pipe 2, gas exceeding a rated pressure enters a boiler 6 under the action of a back pressure valve 4, and when a shut valve 5 is opened, the remaining gas can enter a scrubber 3 through the shut valve 5, and when the shut valve 5 is closed, the remaining gas is stored in the exhaust pipe 2. In this embodiment, the scrubber 3 scrubs the gas by spraying, so as to remove SOx, NOx, and CO in the exhaust gas 2 And removing harmful gases, cooling the waste gas, introducing the washed gas into an air inlet manifold of the engine 1, and supplying the washed gas to the engine 1 for combustion again so as to improve the utilization rate of fuel. The exhaust gas recirculation system that this embodiment provided replaces current draught fan through back pressure valve 4, but effective reduce cost to it is extravagant to reduce the energy.
Optionally, the exhaust gas recirculation system further comprises a flow regulating valve 7, the flow regulating valve 7 being used for regulating the flow of gas delivered from the exhaust of the scrubber tower 3 to the intake manifold of the engine 1. The flow rate of the exhaust gas into the intake manifold of the engine 1 can be controlled by providing the flow rate regulating valve 7.
Optionally, the exhaust gas recirculation system further comprises a first water separator 8, the first water separator 8 for separating moisture from the gas delivered by the scrubber 3 to the intake manifold of the engine 1. The gas delivered to the intake manifold of the engine 1 via the scrubber 3 is guaranteed to be free of moisture by the provision of the first water drop separator 8, preventing moisture from causing damage to the engine 1. In this embodiment, the flow regulating valve 7 is located between the first drop separator 8 and the scrub column 3.
The exhaust gas recirculation system further comprises a turbocharger comprising a turbine and a compressor driven by the turbine, the exhaust port of the scrubber tower 3 being adapted to deliver gas to the input of the compressor, the output of the compressor being adapted to supply gas to the intake manifold of the engine 1; the exhaust manifold of the engine 1 communicates with the input of the turbine, the output of which communicates with the exhaust line 2, while the compressor is also used to deliver fresh air to the intake manifold of the engine 1. By providing a turbocharger, the amount of gas entering the cylinders of the engine 1 can be effectively increased, ensuring full combustion of the fuel.
In this embodiment, the engine 1 and the turbocharger are integrated, the engine 1 is further integrated with an air cooler and a second water drop separator, and gas output by the air compressor can enter an intake manifold of the engine 1 after sequentially passing through the air cooler and the second water drop separator. The inlet air of the engine 1 can be cooled by the air cooler, and the moisture in the air is further removed by the second water drop separator.
Optionally, the exhaust gas recirculation system further comprises an exhaust gas economizer 9 arranged between the shut-off valve 5 and the scrubber 3, the exhaust gas economizer 9 being adapted to recover thermal energy from the exhaust gas flowing therethrough. The exhaust gas economizer 9 is prior art and will not be described in detail herein. Through setting up waste gas economizer 9, can fully carry out effective recovery and utilization to the heat in the waste gas, improve the utilization ratio of energy. In this embodiment, the flue gas economizer 9 is located between the shut-off valve 5 and the scrubber 3.
Optionally, the exhaust gas recirculation system further comprises a circulation tank 10, a circulation pump 11, a heat exchanger 12 and a nozzle. Wherein the circulation tank 10 is used for storing water. The input intercommunication circulation cabinet 10 of circulating pump 11, the input of circulating pump 11's output intercommunication heat exchanger 12, the nozzle sets up in scrubbing tower 3, and heat exchanger 12's output intercommunication nozzle, scrubbing tower 3 are provided with first drain port, first drain port and circulation cabinet 10 intercommunication. Driven by the circulation pump 11, the water in the circulation tank 10 is cooled by the heat exchanger 12 and then sprayed out through the nozzles to wash the gas passing through the scrubber 3.
In this embodiment, the inside of the scrubber 3 is further provided with a packing layer, after the gas entering the scrubber 3 is showered by the water sprayed from the nozzle, the temperature of the gas is reduced to below 100 ℃, and then the gas continuously passes through the packing layer, the packing layer continuously exchanges heat with the sprayed water, the temperature can be further reduced, the packing layer can promote the gas and the water to fully contact, and the water is convenient for the gas to carry out SOx, NOx and CO contained in the gas 2 And the gas is fully dissolved.
Because partial water vapor exists in the exhaust gas after the combustion of the engine 1, after the exhaust gas is washed by the washing tower 3, the water flowing into the circulating cabinet 10 gradually flowsIncrease and due to SOx, NOx, CO 2 The gases are acidic gases, so that the PH of the water in the circulation tank 10 will be weakly acidic. In this regard, the circulation tank 10 is also provided with an overflow. The exhaust gas recirculation system further comprises a neutralization cabinet 13, a discharge cabinet 14, a lye cabinet 15 and a lye pump 16. Wherein, the overflow mouth communicates with the neutralizing cabinet 13, neutralizing cabinet 13 is equipped with the second leakage fluid dram, the second leakage fluid dram communicates with the cabinet 14 that discharges, circulation cabinet 10 normal water can flow into neutralizing cabinet 13 from the overflow mouth after surpassing the overflow mouth, then flow into and discharge and store in the cabinet 14, alkali lye cabinet 15 is used for the storage alkaline liquid, the input and the alkali lye cabinet 15 intercommunication of lye pump 16, the output and the neutralizing cabinet 13 intercommunication of lye pump 16, carry alkaline liquid to neutralizing cabinet 13 through lye pump 16, adjust the pH value of the water that flows into neutralizing cabinet 13 from circulation cabinet 10.
The exhaust gas recirculation system further includes a water treatment supply pump 17, a water treatment device 18, and an external water supply line 19. Wherein, the input end of the water treatment supply pump 17 is communicated with the discharge cabinet 14, the output end of the water treatment supply pump 17 is communicated with the water treatment device 18, and the water treatment device 18 is used for removing the particulate matters and oil in the water; an external water supply line 19 is connected to the water treatment device 18, and the external water supply line 19 is used for connecting an external water facility. The water treatment device 18 is a conventional device, and is not described herein again, and water can be treated by the water treatment device 18 and can be effectively utilized again.
Optionally, the exhaust gas recirculation system further comprises an oil content meter 20 arranged on the external water supply line 19, the oil content meter 20 being adapted to meter the oil content of the water flowing through. The oil content in the water is detected by an oil content meter 20, and whether the water quality reaches the standard or not can be evaluated. Preferably, the exhaust gas recirculation system further comprises a three-way valve 21, the three-way valve 21 having an input port, a first output port and a second output port, the input port and the first output port being connected in series to the external water supply line 19, and the input port being located upstream of the first output port, the second output port being connected to the bleed cabinet 14, the three-way valve 21 enabling the input port to be alternatively connected to the first output port and the second output port. When the water quality is confirmed to reach the standard, the input interface of the three-way valve 21 is communicated with the first output port, and water can be supplied to external water equipment through the external water supply pipeline 19; when the water quality is confirmed not to reach the standard, the input interface of the three-way valve 21 is communicated with the second output port, and the water output by the water treatment device 18 is recycled to the discharge cabinet 14 and is treated again.
Optionally, the exhaust gas recirculation system further comprises a water replenishing pipeline 22 for communicating the circulation tank 10 with the external water supply pipeline 19, and water treated by the water treatment device 18 can be delivered into the circulation tank 10 under the driving of the water treatment supply pump 17, so that the water in the circulation tank 10 can be always in an overflow state, the water in the circulation tank 10 can be updated to a certain extent, and the washing effect can be ensured.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. The utility model provides an exhaust gas recirculation system, includes engine (1), exhaust pipe (2) and scrubbing tower (3), its characterized in that, exhaust gas recirculation system still includes back pressure valve (4) and trip valve (5), the exhaust gas of the exhaust manifold exhaust of engine (1) can be carried to exhaust pipe (2), exhaust pipe (2) respectively with the input of back pressure valve (4) with the input intercommunication of trip valve (5), the output of back pressure valve (4) is used for connecting boiler (6), the output of trip valve (5) with the air inlet intercommunication of scrubbing tower (3), the gas vent of scrubbing tower (3) is used for carrying gas to the air intake manifold of engine (1).
2. An exhaust gas recirculation system according to claim 1, characterized in that it further comprises a flow regulating valve (7), said flow regulating valve (7) being adapted to regulate the flow of gas delivered by the exhaust of the scrubber tower (3) to the intake manifold of the engine (1).
3. An exhaust gas recirculation system according to claim 1, characterized in that it further comprises a first drop of water separator (8), the first drop of water separator (8) being used for separating moisture from the gas delivered by the scrubber tower (3) to the intake manifold of the engine (1).
4. An exhaust gas recirculation system according to claim 1, characterized in that it further comprises an exhaust gas economizer (9) arranged between the shut-off valve (5) and the scrubber tower (3), the exhaust gas economizer (9) being adapted to recover thermal energy from the exhaust gas flowing therethrough.
5. The exhaust gas recirculation system of claim 1, further comprising:
a circulation tank (10) for storing water;
the input end of the circulating pump (11) is communicated with the circulating cabinet (10);
the output end of the circulating pump (11) is communicated with the input end of the heat exchanger (12);
the nozzle, set up in the scrubbing tower (3), the output intercommunication of heat exchanger (12) the nozzle, scrubbing tower (3) are provided with first drain outlet, first drain outlet with circulation cabinet (10) intercommunication.
6. An exhaust gas recirculation system according to claim 5, characterized in that the circulation tank (10) is further provided with an overflow, the exhaust gas recirculation system further comprising:
an alkali liquor cabinet (15) for storing alkali liquor;
the input end of the lye pump (16) is communicated with the lye cabinet (15);
the overflow port is communicated with the neutralization cabinet (13), and the output end of the lye pump (16) is communicated with the neutralization cabinet (13);
the neutralizing cabinet (13) is provided with a second liquid discharging port, and the second liquid discharging port is communicated with the discharging cabinet (14).
7. The exhaust gas recirculation system of claim 6, further comprising:
a water treatment supply pump (17), an input end of the water treatment supply pump (17) is communicated with the discharge cabinet (14);
a water treatment device (18), wherein the output end of the water treatment supply pump (17) is communicated with the water treatment device (18), and the water treatment device (18) is used for removing particles and oil in water;
and the external water supply pipeline (19) is connected with the water treatment device (18), and the external water supply pipeline (19) is used for supplying water to an external water device.
8. An exhaust gas recirculation system according to claim 7, characterized in that it further comprises an oil portion meter (20) arranged on the external water supply line (19), the oil portion meter (20) being adapted to meter the oil content of the water flowing through.
9. An exhaust gas recirculation system according to claim 8, characterized in that it further comprises a three-way valve (21), said three-way valve (21) having an input interface, a first output and a second output, said input interface and said first output being connected in series to said external water supply line (19) and said input interface being located upstream of said first output, said second output communicating with said tapping cabinet (14), said three-way valve (21) enabling said input interface to communicate with either of said first output and said second output.
10. An exhaust gas recirculation system according to claim 7, characterized in that the exhaust gas recirculation system further comprises a water supply line (22) communicating the circulation tank (10) and the external water supply line (19).
CN202211294710.0A 2022-10-21 2022-10-21 Exhaust gas recirculation system Pending CN115419524A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211294710.0A CN115419524A (en) 2022-10-21 2022-10-21 Exhaust gas recirculation system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211294710.0A CN115419524A (en) 2022-10-21 2022-10-21 Exhaust gas recirculation system

Publications (1)

Publication Number Publication Date
CN115419524A true CN115419524A (en) 2022-12-02

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CN202211294710.0A Pending CN115419524A (en) 2022-10-21 2022-10-21 Exhaust gas recirculation system

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