Gas engine gas evaporation cooling EGR exhaust gas cooling system

Abstract

This utility model relates to a gas-fired engine exhaust gas cooling system with evaporative cooling (EGR) technology, comprising a control module, an exhaust module, an intake module, an evaporative cooling module, an intake manifold, a gas engine cylinder head, and an exhaust manifold. The control module is electrically coupled to the exhaust module, intake module, and evaporative cooling module via control lines and is used to control the gas flow rate within these modules. The exhaust manifold is installed on the exhaust side of the gas engine cylinder head. One end of the exhaust module is connected to the outlet end of the exhaust manifold, and the other end is connected to the evaporative cooling module. The evaporative cooling module is connected to the gas engine cylinder head via a gas pipe. One end of the intake module is connected to the intake manifold, and the other end is connected to the evaporative cooling module. This utility model eliminates the original EGR cooler, reducing costs while improving the cooling capacity of the EGR gas.

Description

Technical Field

[0001] This utility model relates to the technical field of EGR cooling systems for gas engines, specifically to an EGR exhaust gas cooling system for gas engines. Background Technology

[0002] To suppress knocking during the operation of natural gas engines and improve gas consumption, an EGR system is needed to introduce part of the exhaust gas from the combustion of natural gas into the intake manifold to mix with fresh air before entering the cylinder for combustion.

[0003] The shortcomings of existing technology are:

[0004] Because of the high exhaust gas temperature, even after water cooling, the exhaust gas temperature remains high in traditional EGR coolers, thus failing to meet the requirement of reducing the intake manifold temperature. Summary of the Invention

[0005] This invention addresses the aforementioned problems by providing a gas engine exhaust gas evaporative cooling (EGR) system, which aims to eliminate the original EGR cooler and improve the cooling capacity of the EGR gas while reducing costs.

[0006] To solve the above problems, the technical solution provided by this utility model is as follows:

[0007] A gas-fired engine exhaust gas cooling system with evaporative cooling (EGR) includes a control module, an exhaust module, an intake module, a gas-fired evaporative cooling module, an intake cover, a gas-fired engine cylinder head, and an exhaust manifold, wherein:

[0008] The control module is electrically coupled to the exhaust module, the intake module, and the gas evaporative cooling module via control lines, and is used to control the gas flow rate in the exhaust module, the intake module, and the gas evaporative cooling module. The exhaust manifold is installed on the exhaust side of the gas engine cylinder head. One end of the exhaust module is connected to the outlet end of the exhaust manifold, and the other end is connected to the gas evaporative cooling module. The gas evaporative cooling module is connected to the gas engine cylinder head via a gas pipe. One end of the intake module is connected to the intake cover plate, and the other end is connected to the gas evaporative cooling module.

[0009] Preferably, the gas evaporation cooling module includes a gas evaporator, a gas pipe control valve, and a gas tank; one end of the gas evaporator is connected to the cylinder head of the gas engine through the gas pipe, and the other end is connected to the gas tank through the gas pipe; the gas pipe control valve is provided on the gas pipe between the gas evaporator and the gas tank; the gas pipe control valve is electrically coupled to the control module through the control line.

[0010] Preferably, the exhaust module includes an EGR exhaust gas outlet pre-control valve, an exhaust gas pipe, an EGR exhaust gas outlet pipe, and an EGR exhaust gas outlet post-control valve; the exhaust gas outlet pipe is connected to the main outlet of the exhaust manifold; the auxiliary outlet of the exhaust manifold is connected to the gas evaporator through the EGR exhaust gas outlet pipe, and then the gas evaporator is connected to the exhaust gas pipe through the EGR exhaust gas outlet pipe; the EGR exhaust gas outlet pre-control valve is provided on the EGR exhaust gas outlet pipe between the auxiliary outlet of the exhaust manifold and the gas evaporator; the EGR exhaust gas outlet post-control valve is provided on the EGR exhaust gas outlet pipe between the gas evaporator and the exhaust gas pipe; the EGR exhaust gas outlet pre-control valve and the EGR exhaust gas outlet post-control valve are respectively electrically coupled to the control module through the control line.

[0011] Preferably, the air intake module includes an EGR exhaust gas intake pipe and an EGR exhaust gas intake pipe control valve; one end of the EGR exhaust gas intake pipe is connected to the gas evaporator, and the other end is connected to the air intake cover plate; the EGR exhaust gas intake pipe is provided with the EGR exhaust gas intake pipe control valve; the EGR exhaust gas intake pipe control valve is electrically coupled to the control module through the control line.

[0012] Preferably, a Venturi tube is provided on the EGR exhaust gas inlet pipe between the EGR exhaust gas inlet pipe control valve and the gas evaporator; the Venturi tube is electrically coupled to the control module through the control line.

[0013] Preferably, a differential pressure sensor is installed on the EGR exhaust gas inlet pipe between the venturi tube and the gas evaporator; the differential pressure sensor is electrically coupled to the control module via the control line.

[0014] Compared with the prior art, this utility model has the following advantages:

[0015] Because this invention eliminates the original EGR cooler, the combustion exhaust gas after the turbocharger is directly introduced into the gas evaporator for cooling through the EGR exhaust gas outlet pipe, and then the cooled exhaust gas is mixed with air and enters the intake manifold, thereby reducing costs while improving the cooling capacity of the EGR gas. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the connection structure of the gas engine gas evaporative cooling (EGR) exhaust gas cooling system, which is a specific embodiment of this utility model.

[0017] The components include: 1. Control module; 2. EGR exhaust gas intake pipe; 3. EGR exhaust gas intake pipe control valve; 4. Intake cover plate; 5. Gas engine cylinder head; 6. Exhaust manifold; 7. EGR exhaust gas outlet pipe pre-control valve; 8. Exhaust gas exhaust pipe; 9. EGR exhaust gas outlet pipe; 10. EGR exhaust gas outlet pipe post-control valve; 11. Gas evaporator; 12. Gas pipe control valve; 13. Gas tank; 4. Gas pipe; 15. Control line; 16. Differential pressure sensor; 17. Venturi tube. Detailed Implementation

[0018] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention. After reading the present invention, any modifications of the present invention in various equivalent forms by those skilled in the art will fall within the scope defined by the appended claims.

[0019] This utility model application claims protection for a gas turbine engine exhaust gas cooling system with evaporative cooling (EGR) and exhaust gas cooling, such as... Figure 1 As shown, it includes a control module 1, an exhaust module A, an intake module B, a gas evaporative cooling module C, an intake cover 4, a gas engine cylinder head 5, and an exhaust manifold 6, wherein:

[0020] Control module 1 is electrically coupled to exhaust module A, intake module B, and gas evaporative cooling module C via control line 15, and is used to control the gas flow rate in exhaust module A, intake module B, and gas evaporative cooling module C; exhaust manifold 6 is installed on the exhaust side of gas engine cylinder head 5; one end of exhaust module A is connected to the outlet end of exhaust manifold 6, and the other end is connected to gas evaporative cooling module C; gas evaporative cooling module C is connected to gas engine cylinder head 5 via gas pipe 14; one end of intake module B is connected to intake cover plate 4, and the other end is connected to gas evaporative cooling module C.

[0021] It should be noted that the gas evaporation cooling module C includes a gas evaporator 11, a gas pipe control valve 12, and a gas tank 13; one end of the gas evaporator 11 is connected to the cylinder head 5 of the gas engine through a gas pipe 14, and the other end is connected to the gas tank 13 through a gas pipe 14; a gas pipe control valve 12 is installed on the gas pipe 14 between the gas evaporator 11 and the gas tank 13; the gas pipe control valve 12 is electrically coupled to the control module 1 through a control line 15.

[0022] It should be noted that the exhaust module A includes an EGR exhaust gas outlet pre-control valve 7, an exhaust gas pipe 8, an EGR exhaust gas outlet pipe 9, and an EGR exhaust gas outlet post-control valve 10; the exhaust gas outlet pipe 8 is connected to the main outlet of the exhaust manifold 6; the auxiliary outlet of the exhaust manifold 6 is connected to the gas evaporator 11 through the EGR exhaust gas outlet pipe 9, and then the gas evaporator 11 is connected to the exhaust gas pipe 8 through the EGR exhaust gas outlet pipe 9; the EGR exhaust gas outlet pre-control valve 7 is installed on the EGR exhaust gas outlet pipe 9 between the auxiliary outlet of the exhaust manifold 6 and the gas evaporator 11; the EGR exhaust gas outlet post-control valve 10 is installed on the EGR exhaust gas outlet pipe 9 between the gas evaporator 11 and the exhaust gas outlet pipe 8; the EGR exhaust gas outlet pre-control valve 7 and the EGR exhaust gas outlet post-control valve 10 are respectively electrically coupled to the control module 1 through the control line 15.

[0023] It should be noted that the intake module B includes an EGR exhaust gas intake pipe 2 and an EGR exhaust gas intake pipe control valve 3; one end of the EGR exhaust gas intake pipe 2 is connected to the gas evaporator 11, and the other end is connected to the intake cover plate 4; the EGR exhaust gas intake pipe 2 is equipped with an EGR exhaust gas intake pipe control valve 3; the EGR exhaust gas intake pipe control valve 3 is electrically coupled to the control module 1 through the control line 15.

[0024] It should be further explained that a Venturi tube 17 is installed on the EGR exhaust gas inlet pipe 2 between the EGR exhaust gas inlet pipe control valve 3 and the gas evaporator 11; the Venturi tube 17 is electrically coupled to the control module 1 through the control line 15.

[0025] It should be further explained that a differential pressure sensor 16 is installed on the EGR exhaust gas inlet pipe 2 between the venturi tube 17 and the gas evaporator 11; the differential pressure sensor 16 is electrically coupled to the control module 1 through the control line 15.

[0026] It should be noted that when the gas engine gas evaporative cooling (EGR) exhaust gas cooling system of this utility model is working, the exhaust gas in the exhaust manifold 6 enters the gas evaporator 11 through the EGR exhaust gas outlet pipe 9 and the EGR exhaust gas outlet pre-control valve 7. After being heated in the gas evaporator 11, part of the gas enters the intake cover plate 4 through the EGR exhaust gas inlet pipe 2, and part enters the exhaust gas outlet pipe 8 through the EGR exhaust gas outlet post-control valve 10. The gas in the gas tank 13 enters the gas evaporator 11 through the gas pipe 14 and the gas pipe control valve 12. In the gas evaporator 11, the gas is then reconnected to the gas engine... On the cylinder head 5; one end of the EGR exhaust gas intake pipe 2 is connected to the EGR exhaust gas, which, after heating, enters the gas engine cylinder head 5 through the gas pipe 14; the opening degrees of the EGR exhaust gas intake pipe control valve 3, the EGR exhaust gas outlet pipe front control valve 7, the EGR exhaust gas outlet pipe rear control valve 10, and the gas pipe control valve 12 are controlled by the control module 1 respectively; the exhaust gas flow rate is measured by the differential pressure sensor 16, and the opening degrees of the EGR exhaust gas intake pipe control valve 3, the EGR exhaust gas outlet pipe front control valve 7, and the EGR exhaust gas outlet pipe rear control valve 10 are controlled according to the flow rate, so as to accurately control the exhaust gas entering the engine and control the temperature of the gas.

[0027] In the above detailed description, various features are combined together in a single embodiment to simplify this disclosure. This approach to disclosure should not be construed as reflecting an intention that embodiments of the claimed subject matter require more features than are explicitly stated in each claim. Rather, as reflected in the appended claims, the present invention is in a state with fewer features than all of the disclosed individual embodiments. Therefore, the appended claims are hereby clearly incorporated into the detailed description, wherein each claim stands alone as a preferred embodiment of the present invention.

[0028] The disclosed embodiments have been described above to enable any person skilled in the art to implement or use this invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments without departing from the spirit and scope of this disclosure. Therefore, this disclosure is not limited to the embodiments given herein, but is consistent with the widest scope of the principles and novel features disclosed in this application.

[0029] The foregoing description includes examples of one or more embodiments. It is certainly impossible to describe all possible combinations of components or methods in order to describe the above embodiments, but those skilled in the art will recognize that further combinations and arrangements of the various embodiments are possible. Therefore, the embodiments described herein are intended to cover all such changes, modifications, and variations that fall within the scope of the appended claims. Furthermore, the term "comprising" as used in the specification or claims is interpreted in a manner similar to the term "including," as interpreted when used as a conjunction in the claims. Additionally, the use of any term "or" in the specification of the claims is intended to mean "non-exclusive or."

[0030] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A gas engine gas evaporation cooling EGR exhaust gas cooling system, characterized by: It includes a control module (1), an exhaust module (A), an intake module (B), a gas evaporative cooling module (C), an intake cover (4), a gas engine cylinder head (5), and an exhaust manifold (6), wherein: The control module (1) is electrically coupled to the exhaust module (A), the intake module (B), and the gas evaporative cooling module (C) via control lines (15), and is used to control the gas flow rate in the exhaust module (A), the intake module (B), and the gas evaporative cooling module (C); the exhaust manifold (6) is installed on the exhaust side of the gas engine cylinder head (5); one end of the exhaust module (A) is connected to the outlet end of the exhaust manifold (6), and the other end is connected to the gas evaporative cooling module (C); the gas evaporative cooling module (C) is connected to the gas engine cylinder head (5) via a gas pipe (14); one end of the intake module (B) is connected to the intake cover plate (4), and the other end is connected to the gas evaporative cooling module (C).

2. The gas engine gas evaporation cooling EGR exhaust gas cooling system in accordance with claim 1, characterized by: The gas evaporation cooling module (C) includes a gas evaporator (11), a gas pipe control valve (12), and a gas tank (13); one end of the gas evaporator (11) is connected to the gas engine cylinder head (5) through the gas pipe (14), and the other end is connected to the gas tank (13) through the gas pipe (14); the gas pipe control valve (12) is provided on the gas pipe (14) between the gas evaporator (11) and the gas tank (13); the gas pipe control valve (12) is electrically coupled to the control module (1) through the control line (15).

3. The gas engine gas evaporation cooling EGR exhaust gas cooling system of claim 2, wherein: The exhaust module (A) includes an EGR exhaust gas outlet pre-control valve (7), an exhaust gas pipe (8), an EGR exhaust gas outlet pipe (9), and an EGR exhaust gas outlet post-control valve (10); the exhaust gas outlet pipe (8) is connected to the main outlet of the exhaust manifold (6); the auxiliary outlet of the exhaust manifold (6) is connected to the gas evaporator (11) through the EGR exhaust gas outlet pipe (9), and then the gas evaporator (11) is connected to the exhaust gas outlet pipe (8) through the EGR exhaust gas outlet pipe (9); the exhaust manifold... An EGR exhaust gas outlet control valve (7) is provided on the EGR exhaust gas outlet pipe (9) between the auxiliary gas outlet of pipe (6) and the gas evaporator (11); an EGR exhaust gas outlet control valve (10) is provided on the EGR exhaust gas outlet pipe (9) between the gas evaporator (11) and the exhaust gas pipe (8); the EGR exhaust gas outlet control valve (7) and the EGR exhaust gas outlet control valve (10) are respectively electrically coupled to the control module (1) through the control line (15).

4. The gas engine exhaust gas evaporative cooling (EGR) system according to claim 3, characterized in that: The intake module (B) includes an EGR exhaust gas intake pipe (2) and an EGR exhaust gas intake pipe control valve (3); one end of the EGR exhaust gas intake pipe (2) is connected to the gas evaporator (11), and the other end is connected to the intake cover plate (4); the EGR exhaust gas intake pipe (2) is provided with the EGR exhaust gas intake pipe control valve (3); the EGR exhaust gas intake pipe control valve (3) is electrically coupled to the control module (1) through the control line (15).

5. The gas engine exhaust gas evaporative cooling (EGR) system according to claim 4, characterized in that: A Venturi tube (17) is provided on the EGR exhaust gas inlet pipe (2) between the EGR exhaust gas inlet pipe control valve (3) and the gas evaporator (11); the Venturi tube (17) is electrically coupled to the control module (1) through the control line (15).

6. The gas engine exhaust gas evaporative cooling (EGR) system according to claim 5, characterized in that: A differential pressure sensor (16) is installed on the EGR exhaust gas inlet pipe (2) between the Venturi tube (17) and the gas evaporator (11); the differential pressure sensor (16) is electrically coupled to the control module (1) through the control line (15).

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