An LNG engine random hydrogen-oxygen co-combustion device and its equipment

Abstract

The present invention discloses a random hydrogen-oxygen co-combustion device and equipment for an LNG engine, including a housing. A cylinder head is fixedly connected to the top end of the housing. A number of cylinder blocks are provided inside the housing. One end of the housing is fixedly connected to [missing content]. A mixing device is provided on the side of the housing. The heating device of the present invention can reuse the waste gas heat source generated after combustion, and transfer the heat source to the surface of the pipe to heat the liquefied natural gas. Moreover, the heating process is safe and effective, lower than the combustion point of natural gas, so that the energy use of the equipment can be more effective. And it avoids the incomplete gasification of natural gas inside the pipeline due to low ambient temperature, improving the combustion efficiency of the equipment. Through the mixing device structure, hydrogen and oxygen can be combined in a fixed ratio, and the original storage methods of hydrogen and oxygen are separated, making the combustion process more stable.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical equipment, and particularly to a hydrogen-oxygen random mixing and combustion device for an LNG engine and its equipment. Background Art

[0002] It is very difficult to use hydrogen and oxygen specifically as fuel, because the calorific value of hydrogen per unit volume is low, the combustion speed is extremely fast and difficult to control, and the manufacturing cost of the hydrogen-oxygen machine is relatively high, so it is difficult to be widely promoted and applied. However, if hydrogen and oxygen are used as an energy-saving gas additive for gas combustion, only a small amount of hydrogen and oxygen need to be mixed with other gases for combustion to save a large amount of fuel costs and improve work efficiency. It enables the excellent application of the characteristics and advantages of hydrogen in combustion. LNG is liquefied natural gas. At present, the main power source of automobiles relies on gasoline. However, a large amount of harmful gases and greenhouse gases are generated during the use of gasoline, which greatly affects environmental pollution. Natural gas, as a clean and efficient energy source, is easy to mix evenly with air during use, burns more completely, is not easy to produce carbon deposits, and has good explosion-proof performance. It will not dilute the lubricating oil, greatly reducing the wear of the engine and extending the service life of the engine, etc., and thus is increasingly favored by people.

[0003] At present, during the use of LNG engines, hydrogen with a fixed content is mainly mixed into natural gas to make up for the insufficient power of natural gas engines. However, since the intake air volume inside the engine is a fixed value and mainly relies on turbocharging to provide the oxygen required for internal combustion, this method will cause the pressure value inside the engine to be too high, and the oxygen supply during the combustion process is still incomplete, resulting in incomplete fuel combustion inside the engine, and then leading to an increase in the emissions of a small amount of harmful gases such as carbon monoxide and nitrogen monoxide, reducing the service life of the three-way catalytic converter. At the same time, when the equipment is in use, the combination of hydrogen and oxygen requires the oxygen content to be maintained at a relatively low level. If the content is too high, it will increase the use risk of the equipment and the explosion probability of the equipment. Moreover, when LNG enters the engine for combustion, LNG needs to be vaporized into a gas state. A large amount of heat is required during the vaporization process of LNG. If external heating is not provided to supply the heat required for vaporizing LNG, it will cause poor vaporization of LNG and icing on the outer surface of components, which is not conducive to the normal operation of the system. If additional energy (such as electric heating) is used to heat LNG and the components prone to icing, it will cause excessive energy consumption, and the device structure is complex and the manufacturing cost is high. For this reason, we propose a hydrogen-oxygen random mixing and combustion device for an LNG engine and its equipment. Summary of the Invention

[0004] The purpose of the present invention is to provide a hydrogen-oxygen random mixing and combustion device for an LNG engine and its equipment to solve the problems raised in the above background art.

[0005] To achieve the above object, the present invention provides the following technical solution: An LNG engine random hydrogen-oxygen co-combustion device, including a housing, the top end of the housing is fixedly connected with a cylinder head, several groups of cylinder blocks are arranged inside the housing, one end of the housing is fixedly connected with, and a mixing device is arranged on the side of the housing.

[0006] Preferably, the mixing device includes a hydrogen storage bottle, a hydrogen storage bottle is arranged on the side of the housing, and the hydrogen storage bottle is installed at the rear end of the vehicle. An oxygen storage bottle is arranged on the side of the hydrogen storage bottle. One end of the hydrogen storage bottle is fixedly connected with a pipe orifice, one end of the pipe orifice is rotatably connected with one end of a flow limiting valve, the bottom end of the flow limiting valve is fixedly connected with one end of a bent pipe, the other end of the bent pipe is fixedly connected with the top end of a mixing pipe, a buffer device is arranged on the side of the mixing pipe, one end of the buffer device is fixedly connected with a transmission pipe, and one end of the transmission pipe is fixedly connected with one end of the cylinder head.

[0007] Preferably, the buffer device includes a main pipe, one side of the mixing pipe is fixedly connected with one end of the main pipe, one end of the main pipe is fixedly connected with the side of a buffer housing, the inside of the buffer housing is a hollow structure, the inner wall of the buffer housing is fixedly connected with one end of a main spring, the bottom end of the main spring is fixedly connected with a metal elastic sheet, the top end of the buffer housing is fixedly connected with a right-angle pipe, one end of the right-angle pipe is fixedly connected with the side of a regulating valve, the other end of the regulating valve is fixedly connected with one end of a branch pipe, one end of the branch pipe is connected through the side of the main pipe, and an electromagnetic valve is fixedly connected to the outer edge of the main pipe.

[0008] Preferably, the top end inner wall of the regulating valve is fixedly connected with one end of a small spring, the other end of the small spring is fixedly connected with the top end of a baffle plate, the center of the top end of the baffle plate is fixedly connected with one end of a main shaft, the outer edge of the main shaft is sleeved inside the small spring, the bottom end of the baffle plate is fixedly connected with a pressure reducing piece, and the outer edge of the pressure reducing piece is sleeved inside the regulating valve.

[0009] An LNG engine device, including a housing, a supercharging exhaust is fixedly connected to the side of the housing, and a heating device is arranged on the side of the supercharging exhaust.

[0010] Preferably, the heating device includes a connecting pipe, one side of the supercharging exhaust is connected through one end of the connecting pipe, one end of the connecting pipe is fixedly connected with one end of a heat exchange pipe, two groups of connecting pipes are provided, the side of the heat exchange pipe is fixedly connected with the side of a heat exchange wire, both ends of the heat exchange wire are fixedly connected with the side of a water storage tank, both ends of the water storage tank are fixedly connected with both ends of a heating pipe, and the side of the heating pipe is fixedly connected with the side of a vaporization pipe.

[0011] Preferably, a water pump is installed inside the water storage tank, and the output end of the water pump is connected to one end of the heat exchange line. The other output end of the water pump is connected to one end of the heating pipe. One end of the vaporization pipe is connected to the output port of the natural gas tank through a pipeline.

[0012] The present invention has at least the following beneficial effects:

[0013] Through the heating device structure, natural gas can be vaporized. Through the mixing device structure, hydrogen and oxygen can be combined in a fixed ratio. Since the intake air volume inside the engine is a fixed value, mainly turbocharging is used to provide the oxygen required for internal combustion. However, this method will cause the pressure value inside the engine to be too high, and the oxygen supply during the combustion process is still incomplete, resulting in incomplete fuel combustion inside the engine. Moreover, when LNG enters the engine for combustion, it needs to be vaporized into a gaseous state. During the vaporization process of LNG, a large amount of heat needs to be absorbed, causing excessive energy consumption, and the device structure is complex and the manufacturing cost is high. Compared with the prior art, the heating device of the present invention can reuse the waste gas heat source generated after combustion, and transfer the heat source to the surface of the pipe to heat the liquefied natural gas. Moreover, the heating process is safe and effective, lower than the combustion point of natural gas, so that the energy use of the equipment can be more effective, and the situation of incomplete gasification of natural gas inside the pipeline due to low ambient temperature is avoided, improving the combustion efficiency of the equipment. Through the mixing device structure, hydrogen and oxygen can be combined in a fixed ratio, and the original storage methods of hydrogen and oxygen are separated, reducing the use risk of the equipment, making the combustion process more stable, and using the hydrogen and oxygen incorporated into natural gas can increase the calorific value of the fuel, greatly improving the combustion utilization rate, and reducing carbon emissions. At the same time, it can also alleviate problems such as insufficient natural gas supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0015] Figure 2 is a schematic diagram of the overall structure of the housing of the present invention;

[0016] Figure 3 is a schematic diagram of the overall structure of the mixing device of the present invention;

[0017] Figure 4 is an exploded structure diagram of the mixing device of the present invention;

[0018] Figure 5 is a schematic cross-sectional view of the buffer device structure of the present invention;

[0019] Figure 6 is a schematic cross-sectional view of the regulating valve of the present invention;

[0020] Figure 7 This is a schematic diagram of the overall structure of the heating device of the present invention;

[0021] Figure 8 This is a left view of the structure of the heating device of the present invention;

[0022] In the figure: 1 - housing; 2 - pressurized exhaust; 3 - heating device; 31 - connecting pipe; 32 - heat exchange pipe; 33 - heat exchange wire; 34 - water storage tank; 35 - heating pipe; 36 - vaporization pipe; 37 - outer pipe; 4 - mixing device; 41 - hydrogen storage bottle; 42 - oxygen storage bottle; 43 - pipe orifice; 44 - flow limiting valve; 45 - bent pipe; 46 - mixing pipe; 47 - buffer device; 471 - main pipe; 472 - buffer housing; 473 - main spring; 474 - metal shrapnel; 475 - solenoid valve; 476 - branch pipe; 477 - regulating valve; 478 - main shaft; 479 - main shaft; 4710 - baffle; 4711 - pressure reducing piece; 4712 - right-angled pipe; 48 - transmission pipe; 5 - cylinder head; 6 - cylinder block. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] Please refer to Figure 1-8 , the present invention provides a technical solution: a hydrogen-oxygen co-combustion device and its equipment for an LNG engine, including a housing 1, the top of the housing 1 is fixedly connected with a cylinder head 5, several groups of cylinder blocks 6 are provided inside the housing 1, one end of the housing 1 is fixedly connected with 7, a mixing device 4 is provided on the side of the housing 1. The housing 1 is the main structure of the engine. When the top of the cylinder head 5 mixes the fuel gas through the transmission of the heating device 3 and the mixing device 4, and the mixed gas is poured into the inside of the cylinder block 6 through the nozzle at the bottom of the cylinder head 5. And a piston is provided inside the cylinder block 6, and a connecting rod is provided at the bottom of the piston. And a spark plug is provided at the top of the cylinder block 6. The spark plug ignites to ignite the mixed gas inside the cylinder block 6, and the generated fuel gas is discharged through the pressurized exhaust 2 structure and the exhaust pipe connected to the pressurized exhaust 2.

[0025] The mixing device 4 includes a hydrogen storage bottle 41. A hydrogen storage bottle 41 is provided on the side of the housing 1, and the hydrogen storage bottle 41 is installed at the rear end of the vehicle. An oxygen storage bottle 42 is provided on the side of the hydrogen storage bottle 41. One end of the hydrogen storage bottle 41 is fixedly connected to a pipe orifice 43. One end of the pipe orifice 43 is rotatably connected to one end of a flow limiting valve 44. The bottom end of the flow limiting valve 44 is fixedly connected to one end of a bent pipe 45. The other end of the bent pipe 45 is fixedly connected to the top end of a mixing pipe 46. A buffer device 47 is provided on the side of the mixing pipe 46. One end of the buffer device 47 is fixedly connected to a transmission pipe 48. One end of the transmission pipe 48 is fixedly connected to one end of a cylinder head 5. By a person controlling a solenoid valve, the flow path of the flow limiting valve 44 is controlled. At the same time, the hydrogen inside the hydrogen storage bottle 41 and the oxygen inside the oxygen storage bottle 42 are opened, discharged through the pipe orifice 43, and limited in flow through the inside of the flow limiting valve 44. At the same time, the discharged air flow can be buffered by the bent structure of the bent pipe 45, so as to avoid the influence of the air flow on the pipeline. At the same time, hydrogen and oxygen enter the inside of the mixing pipe 46 through the bent pipe 45 for combination. The mixed gas enters the inside of the buffer device 47 through the mixing pipe 46. The internal pressure of the mixing pipe 46 is balanced by the buffer device 47, so that a stable air flow can be transmitted to the inside of the engine through the transmission pipe 48, so as to provide natural gas doped with hydrogen as power for the engine, and the assistance of oxygen can make the internal combustion more complete.

[0026] The buffer device 47 includes a main pipe 471. One side of the mixing pipe 46 is fixedly connected to one end of the main pipe 471. One end of the main pipe 471 is fixedly connected to one side of a buffer housing 472. The interior of the buffer housing 472 is a hollow structure. The inner wall of the buffer housing 472 is fixedly connected to one end of a main spring 473. A metal elastic sheet 474 is fixedly connected to the bottom end of the main spring 473. A right-angle pipe 4712 is fixedly connected to the top end of the buffer housing 472. One end of the right-angle pipe 4712 is fixedly connected to one side of a regulating valve 477. The other end of the regulating valve 477 is fixedly connected to one end of a branch pipe 476. One end of the branch pipe 476 is connected through the side of the main pipe 471. An electromagnetic valve 475 is fixedly connected to the outer edge of the main pipe 471. When the air flow inside the mixing pipe 46 enters the interior of the buffer housing 472 through the main pipe 471, then due to the pressure of the air flow inside the mixing pipe 46, the metal elastic sheet 474 inside the buffer housing 472 can be pushed upward. At the same time, the metal elastic sheet 474 will compress the main spring 473. At the same time, since one end of the right-angle pipe 4712 penetrates inside the buffer housing 472, the air flow inside the buffer housing 472 can enter the interior of the regulating valve 477 through 412. The internal structure of the regulating valve 477 reduces the pressure of the air flow, ensuring that the pressure inside the mixing pipe 46 can maintain a stable pressure, avoiding the situation where the hydrogen storage bottle 41 or the oxygen storage bottle 42 causes an overload of the air flow due to control. The setting of the buffer device 47 can prevent the internal pressure from overloading and is safer to use.

[0027] The top end of the inner wall of the regulating valve 477 is fixedly connected to one end of a small spring 478. The other end of the small spring 478 is fixedly connected to the top end of a baffle 4710. The center of the top end of the baffle 4710 is fixedly connected to one end of a main shaft 479. The outer edge of the main shaft 479 is sleeved inside the small spring 478. The bottom end of the baffle 4710 is fixedly connected to a pressure-reducing piece 4711. The outer edge of the pressure-reducing piece 4711 is sleeved inside the regulating valve 477. When the air flow passes through the interior of the regulating valve 477, since the side of the pressure-reducing piece 4711 fits with the inner wall of the regulating valve 477, when there is air flow passing through the bottom end of the pressure-reducing piece 4711, the pressure-reducing piece 4711 will be pushed upward by the pressure of the air flow, thus compressing the main shaft 479, increasing the gas flow opening inside the regulating valve 477, changing the gas flow rate entering the branch pipe 476, keeping the pressure at the front end of the main pipe 471 relatively balanced, and ensuring that the air flow rate entering the main pipe 471 from the branch pipe 476 is slow when the pressure is too high, avoiding the situation where the pressure on the inner wall of the main pipe 471 is instantaneously high and ensuring that the inner wall of the main pipe 471 does not bear too much pressure.

[0028] An LNG engine device includes a housing 1. A supercharging exhaust 2 is fixedly connected to the side of the housing 1. A heating device 3 is provided on the side of the supercharging exhaust 2. Through the cooperation of the housing 1 and the supercharging exhaust 2, and the heating device 3 continuously supplies natural gas to the inside of the housing 1, the natural gas can be burned, thereby ensuring the normal operation of the engine.

[0029] The heating device 3 includes a connecting pipe 31. One end of the connecting pipe 31 is connected through the side of the supercharging exhaust 2. One end of the connecting pipe 31 is fixedly connected to one end of a heat exchange pipe 32. There are two groups of connecting pipes 31. The side of the heat exchange pipe 32 is fixedly connected to the side of a heat exchange wire 33. Both ends of the heat exchange wire 33 are fixedly connected to the side of a water storage tank 34. The top of the water storage tank 34 is fixedly connected to both ends of a heating pipe 35. The side of the heating pipe 35 is fixedly connected to the side of a gasification pipe 36. When the natural gas inside the housing 1 burns, the discharged gas has a high temperature. At the same time, a connecting pipe 31 is provided on the side of the supercharging exhaust 2. A small amount of the exhaust inside the supercharging exhaust 2 can flow through the inside of the heat exchange pipe 32 through the connecting pipe 31. Since the diameters of the heat exchange pipe 32 and the connecting pipe 31 are different, the temperature of the heat exchange pipe 32 is lower than that of the connecting pipe 31. At the same time, the coolant inside the heat exchange pipe 32 can communicate with the coolant inside the water storage tank 34. Thus, when the output port at one end of the gasification pipe 36 is connected to the connected natural gas, the natural gas can be temporarily stored and gasified inside the gasification pipe 36. At the same time, due to the gasification effect, the temperature inside the gasification pipe 36 is low. At the same time, the heating pipe 35 circulates the water source inside the water storage tank 34 to the surface of the gasification pipe 36, thereby heating the temperature of the gasification pipe 36. And because the heating device 3 structure only uses a small amount of gas inside the supercharging exhaust 2, the heating effect can only reach a stable position, thereby making the liquefaction effect of liquefied natural gas more comprehensive and reducing the energy required for LNG gasification.

[0030] A water pump is installed inside the water storage tank 34, and the output end of the water pump is connected to one end of the heat exchange wire 33. The other output end of the water pump is connected to one end of the heating pipe 35. One end of the gasification pipe 36 is connected to the output port of the natural gas tank through a pipeline. The connection between the water storage tank 34 and the heat exchange wire 33 and the heating pipe 35 can transfer the heat source inside the water storage tank 34 through the water pump, thereby realizing the circulation of the cooling water inside, and the cooling effect is limited to avoid the situation of natural gas spontaneous combustion caused by heating.

[0031] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0032] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydrogen-oxygen random mixing and combustion device for an LNG engine, comprising a housing (1), the top end of the housing (1) is fixedly connected with a cylinder head (5), a plurality of groups of cylinder blocks (6) are arranged inside the housing (1), and one end of the housing (1) is fixedly connected with (7), characterized in that: A mixing device (4) is provided on the side of the housing (1). The mixing device (4) includes a hydrogen storage cylinder (41). A hydrogen storage cylinder (41) is provided on the side of the housing (1), and the hydrogen storage cylinder (41) is installed at the rear end of the vehicle. An oxygen storage cylinder (42) is provided on the side of the hydrogen storage cylinder (41). One end of the hydrogen storage cylinder (41) is fixedly connected to a pipe orifice (43). One end of the pipe orifice (43) is rotatably connected to one end of a flow limiting valve (44). The bottom end of the flow limiting valve (44) is fixedly connected to one end of a bent pipe (45). The other end of the bent pipe (45) is fixedly connected to the top end of a mixing pipe (46). A buffer device (47) is provided on the side of the mixing pipe (46). One end of the buffer device (47) is fixedly connected to a transmission pipe (48). One end of the transmission pipe (48) is fixedly connected to one end of a cylinder head (5). The buffer device (47) includes a main pipe (471). One side of the mixing pipe (46) is fixedly connected to one end of the main pipe (471). One end of the main pipe (471) is fixedly connected to the side of a buffer housing (472). The interior of the buffer housing (472) is a hollow structure. The inner wall of the buffer housing (472) is fixedly connected to one end of a main spring (473). The bottom end of the main spring (473) is fixedly connected to a metal elastic sheet (474). The top end of the buffer housing (472) is fixedly connected to a right-angle pipe (4712). One end of the right-angle pipe (4712) is fixedly connected to the side of a regulating valve (477). The other end of the regulating valve (477) is fixedly connected to one end of a branch pipe (476). One end of the branch pipe (476) is connected through the side of the main pipe (471). An electromagnetic valve (475) is fixedly connected to the outer edge of the main pipe (471). The top end inner wall of the regulating valve (477) is fixedly connected to one end of a small spring (478). The other end of the small spring (478) is fixedly connected to the top end of a baffle (4710). The center part of the top end of the baffle (4710) is fixedly connected to one end of a main shaft (479). The outer edge of the main shaft (479) is sleeved inside the small spring (478). The bottom end of the baffle (4710) is fixedly connected to a pressure reducing sheet (4711). The outer edge of the pressure reducing sheet (4711) is sleeved inside the regulating valve (477).

2. A hydrogen-oxygen random co-combustion device for an LNG engine according to claim 1, comprising a housing (1), and a supercharging exhaust (2) fixedly connected to the side of the housing (1), characterized in that: A heating device (3) is provided on the side of the supercharging exhaust (2).

3. The hydrogen and oxygen random mixing and combustion device for an LNG engine according to claim 2, characterized in that: The heating device (3) includes a connecting pipe (31). The side of the supercharging exhaust (2) is connected through one end of the connecting pipe (31). One end of the connecting pipe (31) is fixedly connected to one end of a heat exchange pipe (32). There are two groups of connecting pipes (31). The side of the heat exchange pipe (32) is fixedly connected to the side of a heat exchange wire (33). Both ends of the heat exchange wire (33) are fixedly connected to the side of a water storage tank (34). Both ends of the water storage tank (34) are fixedly connected to a heating pipe (35). The side of the heating pipe (35) is fixedly connected to the side of a vaporization pipe (36).

4. An LNG engine random hydrogen-oxygen co-combustion device according to claim 3, characterized in that: A water pump is installed inside the water storage tank (34), and the output end of the water pump is connected to one end of the heat exchange line (33). The other output end of the water pump is connected to one end of the heating pipe (35). One end of the vaporization pipe (36) is connected to the output port of the natural gas tank through a pipeline.

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