Liquid particle multiplication oil-gas separation device and system

Abstract

The invention discloses a liquid particle multiplication oil-gas separation device which comprises a shell, a cover plate and a separation device, and the separation device comprises a first impact plate, a second impact plate and oil molecule aggregation cotton; a separation cavity is defined by the cover plate and the shell, an air outlet is formed in the shell, and an air inlet is formed in the cover plate; the first impact plate and the second impact plate are sequentially arranged in the flowing direction of oil gas in the separation cavity, and liquid particle multiplication holes are formed in the first impact plate and the second impact plate. The oil-gas separation system comprises a cylinder body, the liquid particle multiplication oil-gas separation device and a filter cotton type oil-gas separation device, oil gas of the cylinder body passes through the liquid particle multiplication oil-gas separation device and then is input into the filter cotton type oil-gas separation device, and oil-gas pre-separation and secondary separation are achieved. Through the synergistic effect of multi-stage impact multiplication of liquid particles, filtration adsorption and secondary separation, the oil-gas separation efficiency is improved, meanwhile, efficient recovery of oil liquid is achieved, the structure is compact, and practicability is high.

Description

Technical Field

[0001] This invention relates to the field of natural gas engine oil-gas separation technology, and in particular to a liquid-particle multiplication oil-gas separation device and system. Background Technology

[0002] In the field of engine machinery, natural gas engines, with their clean and efficient characteristics, have been widely used in various power devices. However, during actual operation, the combustion and lubrication systems of natural gas engines generate a large number of small oil droplets. These droplets are characterized by their small size and high dispersion, making them difficult to naturally aggregate during the engine's exhaust cycle and easily forming a stable oil-gas mixture.

[0003] During the engine's internal circulation process, these small, unseparated oil droplets can enter the turbocharger directly along with crankcase blow-by. When the oil droplet content exceeds a certain threshold, it can lead to a series of adverse consequences: on the one hand, it significantly increases engine oil consumption, raising operating costs; on the other hand, the deposition and adhesion of oil droplets inside the turbocharger can severely affect its aerodynamic performance and mechanical transmission efficiency, accelerate the wear and aging of internal turbocharger components, drastically shorten their service life, and consequently affect the operational stability and reliability of the entire engine system.

[0004] To address the aforementioned technical challenges, oil-gas separation systems have become crucial components of natural gas engines, with their separation efficiency directly impacting engine operating economy and durability. Existing oil-gas separation technologies often employ single-channel or single-stage filtration structures, which struggle to efficiently capture and separate small oil droplets, failing to meet the oil-gas purification requirements under high engine operating conditions. Therefore, developing an oil-gas separation system with higher separation efficiency and greater adaptability has become an important technological direction for improving the overall performance of natural gas engines.

[0005] The above background information is provided only to aid in understanding the concept and technical solution of this invention. It does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above information was disclosed on the filing date of this patent application, the above background information should not be used to evaluate the novelty and inventiveness of this application. Summary of the Invention

[0006] The main objective of this invention is to propose a liquid-particle multiplication oil-gas separation device and system to solve the technical problems of low separation efficiency, poor oil return effect, and insufficient separation accuracy of existing oil-gas separation devices and systems.

[0007] Therefore, this invention proposes a liquid-particle multiplication oil-gas separation device and system.

[0008] Preferably, the present invention may also have the following technical features:

[0009] A liquid particle multiplication oil-gas separation device includes a shell, a cover plate, and a separation device. The separation device includes a first impact plate, a second impact plate, and oil molecule agglomerating cotton. The cover plate and the shell are detachably connected to form a separation chamber. The shell has an air outlet, and the cover plate has an air inlet. The first and second impact plates are arranged sequentially along the oil-gas flow direction in the separation chamber, and sequentially divide the separation chamber into a first separation chamber, a second separation chamber, and a third separation chamber. Both the first and second impact plates are provided with liquid particle multiplication holes. The oil molecule agglomerating cotton is installed in the second separation chamber to filter oil droplets in the oil-gas mixture.

[0010] Furthermore, the air inlet is connected to the first separation chamber. The air inlet is composed of several air inlets with the same diameter, and the lowest air inlet serves as the oil outlet of the liquid particle multiplication oil-gas separator. The lowest point of the oil outlet is flush with the bottom of the separation chamber, which allows the oil accumulated at the bottom of the separation chamber to flow back to the mounting tank from the oil outlet.

[0011] Furthermore, the air outlet is connected to the third separation chamber, and the air outlet is positioned at a height higher than the bottom of the third separation chamber to discharge the pre-separated gas.

[0012] Furthermore, there are several liquid particle multiplication holes, which are distributed in a rectangular array on the first impact plate and the second impact plate.

[0013] Furthermore, both the first and second impact plates are provided with oil return ports at their bottoms.

[0014] Furthermore, it also includes a baffle, which is disposed between the first impact plate and the oil molecule aggregation cotton. Its upper end is fixedly connected to the top of the inner wall of the shell, and its lower end is left with an oil and gas flow gap between it and the bottom of the inner wall of the shell. The baffle is arranged parallel to the impact plate.

[0015] Furthermore, there are two baffles, namely a first baffle and a second baffle. The first baffle is installed in the second separation chamber, and the second baffle is installed in the third separation chamber.

[0016] An oil-gas separation system including a liquid particle multiplication oil-gas separator, the oil-gas separation system comprising a cylinder body, a liquid particle multiplication oil-gas separator, and a filter cotton type oil-gas separator; the oil-gas output end of the cylinder body is connected to the input end of the liquid particle multiplication oil-gas separator, for conveying the oil and gas to be separated to the liquid particle multiplication oil-gas separator; the output end of the liquid particle multiplication oil-gas separator is connected to the input end of the filter cotton type oil-gas separator, for conveying the oil and gas pre-separated by the liquid particle multiplication oil-gas separator to the filter cotton type oil-gas separator for secondary separation.

[0017] The beneficial effects of this invention compared to the prior art include:

[0018] 1. The liquid-particle multiplication oil-gas separator sets up first and second separation impact plates and opens liquid-particle multiplication holes on them, so that oil droplets in the oil and gas collide with the impact plates and become small oil droplets that adhere to the impact plates to achieve separation. Combined with the filtration effect of oil molecule aggregation cotton, multi-stage separation is achieved, which significantly improves the separation efficiency and can effectively separate tiny oil droplets in oil and gas.

[0019] 2. The design of the oil return structure, especially the flush arrangement of the oil drain port and the oil-gas mixture inlet with the bottom of the separation chamber, ensures smooth oil recovery, reduces oil waste, and improves energy utilization.

[0020] 3. The baffle changes the direction of oil and gas flow, prolongs the residence time of oil and gas in the separation chamber, and small oil droplets adhere to the baffle after hitting it, and then flow down the baffle wall and finally flow back to the oil outlet, making the separation more complete and further improving the separation effect.

[0021] 4. The oil-gas separation system adopts a two-stage separation structure consisting of a liquid-particle multiplication oil-gas separator and a filter cotton-type oil-gas separator connected in series. This achieves a combination of pre-separation and fine separation, resulting in high separation accuracy and the ability to fully purify the oil-gas mixture, meeting the needs of different application scenarios. Attached Figure Description

[0022] Figure 1 This is a structural diagram of the liquid-particle multiplication oil-gas separation device according to a specific embodiment of the present invention.

[0023] Figure 2 This is an internal structural diagram of the liquid-particle multiplication oil-gas separation device according to a specific embodiment of the present invention.

[0024] Figure 3 This is an overall assembly drawing of the oil-gas separation system according to a specific embodiment of the present invention. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to specific embodiments and the accompanying drawings. It should be emphasized that the following description is merely exemplary and is not intended to limit the scope or application of the present invention.

[0026] Non-limiting and non-exclusive embodiments will be described with reference to the following figures, wherein the same reference numerals denote the same parts unless otherwise specifically stated.

[0027] like Figure 1-3The illustrated liquid-particle multiplication oil-gas separation device includes a housing 1, a cover plate 2, and a separation device 3. The separation device 3 includes a first impact plate 31, a second impact plate 32, and oil molecule aggregation cotton 33. The cover plate 2 covers the opening at the top of the housing 1, and the two are detachably connected by a bolt assembly. The bolt assembly is evenly distributed circumferentially along the mating surface of the cover plate 2 and the housing 1. The cover plate 2 and the housing 1 together form a separation chamber 4. An air outlet 6 is provided on the upper part of one side wall of the housing 1, and an air inlet 7 is provided on the cover plate 2. The first impact plate 31 and the second impact plate 32 are vertically arranged sequentially along the oil-gas flow direction in the separation chamber 4 by welding, and the edges of the first impact plate 31 and the second impact plate 32 are connected to the separation chamber 4. The inner wall of the separation chamber 4 is tightly fitted, dividing the separation chamber 4 into three interconnected chambers: a first separation chamber 41, a second separation chamber 42, and a third separation chamber 43. Liquid particle multiplication holes 5 are provided through the first impact plate 31 and the second impact plate 32. These holes are circular through-holes, and several holes 5 are arranged in a uniform rectangular array. This array guides oil particles in the oil-gas mixture to collide with each other as they pass through the holes, achieving a liquid particle multiplication effect and further increasing the adhesion of oil droplets, thus improving subsequent separation efficiency. The oil molecule aggregation cotton 33 is fitted into the second separation chamber 42 according to its size and can be disassembled and replaced later. It is used to filter oil droplet particles in the oil-gas mixture after liquid particle multiplication. The operation process of the liquid particle multiplication oil-gas separator 103 is as follows: 1. Intake separation stage: The oil-gas mixture in the crankcase enters the installation groove of the liquid particle multiplication oil-gas separator 103 in the cylinder block 102 through the oil-gas channel for transition, making the flow of the oil-gas mixture more gentle. At the same time, when the oil-gas mixture collides with the wall of the cylinder block 102, oil droplets adhere to the wall surface of the cylinder block 102, playing a role in oil-gas separation. Then, it enters the first separation chamber 41 through the air inlet 7 on the cover plate 2. Under the action of airflow, it impacts the first impact plate 31. The oil particles collide and aggregate at the first impact plate 31 to achieve liquid particle multiplication, making the oil droplets smaller and easier to adhere, thus improving oil-gas separation. 1. Efficiency: Some large oil droplets adhere to the surface of the first impact plate 31 and flow down the plate; 2. Secondary separation stage: The oil and gas after being processed by the first impact plate 31 enter the second separation chamber 42, pass through the oil molecule aggregation cotton 33, and the oil molecule aggregation cotton 33 captures the oil droplet particles, realizing secondary filtration and separation; 3. Tertiary separation and exhaust stage: The oil and gas after secondary separation enter the third separation chamber 43 through the second impact plate 32, and the remaining small oil droplets further settle or collide and separate, and finally the clean gas is discharged from the exhaust port 6 of the shell 1; 4. Oil return stage: The oil collected during the separation process flows along the bottom of the separation chamber 4 to the oil discharge port 8, and finally flows back to the installation tank.

[0028] like Figure 1-2The air inlet 7 shown is connected to the first separation chamber 41. The air inlet 7 is composed of several circular air inlets of the same diameter arranged vertically and evenly along the cover plate 2. The diameter of the air inlets is preset according to the oil and gas transport flow rate. The lowest air inlet also serves as the oil outlet 8 of the liquid particle multiplication oil and gas separator 103. The lowest point of the oil outlet 8 is flush with the inner wall of the bottom of the separation chamber 4. This structural design allows the oil accumulated at the bottom of the separation chamber 4 to flow smoothly back to the installation tank of the equipment from the oil outlet 8 under the action of gravity, avoiding the oil from stagnating and deteriorating at the bottom of the separation chamber 4, which would affect the separation performance of the device.

[0029] like Figure 1-3 The air outlet 6 shown is connected to the third separation chamber 43 and is connected to the filter cotton type oil-gas separator 104. The air outlet 6 is set at a height higher than the bottom of the third separation chamber 43, which can prevent the oil at the bottom of the separation chamber 4 from being discharged with the gas. It is mainly used to discharge the clean gas after multi-stage pre-separation by the device.

[0030] like Figure 2 The liquid particle multiplication holes 5 shown are provided in a plurality of them, and are distributed in a uniform rectangular array on the first impact plate 31 and the second impact plate 32. The diameter of the liquid particle multiplication holes 5 on the first impact plate 31 is slightly larger than that on the second impact plate 32. This gradient aperture design can realize the graded multiplication of oil particles. First, the small oil particles are initially aggregated through the large aperture channel, and then further collided and aggregated through the small aperture channel, thereby improving the effect of liquid particle multiplication.

[0031] like Figure 2 The bottom of the first impact plate 31 and the second impact plate 32 shown are both provided with oil return ports 9. The oil return ports 9 are semi-circular openings that extend along the gas flow direction. The oil return ports 9 enable the oil at the bottom of the separation chamber 4 to flow to the first separation chamber 41 and then be discharged from the oil outlet 8.

[0032] like Figure 2The diagram also includes baffles 101, of which there are two baffles: a first baffle 1011 and a second baffle 1012. The first baffle 1011 is located in the second separation chamber 42 between the first impact plate 31 and the oil molecule aggregation cotton 33. Its upper end is fixedly connected to the top of the inner wall of the housing 1 by welding, and its lower end has a preset height oil-gas flow gap with the bottom of the inner wall of the housing 1 to allow the oil and gas to flow smoothly to the subsequent separation process. The second baffle 1012 is installed in the third separation chamber 43, located between the second impact plate 32 and the air outlet 6. Its installation method is the same as that of the first baffle 1011. The second baffle 1012 can block the oil and gas separated by the second impact plate 32 again, capture the residual tiny oil droplets, realize three-stage auxiliary separation, and further improve the cleanliness of the discharged gas. The baffle 101 is arranged parallel to the impact plate, and its size is adapted to the cross-sectional size of the separation chamber 4. The baffle 101 can guide the airflow, avoid the airflow directly impacting the oil molecule aggregation cotton 33, reduce the local load of the oil molecule aggregation cotton 33, and further improve the separation effect.

[0033] like Figure 1-3 The diagram illustrates an oil-gas separation system incorporating a liquid-particle multiplication oil-gas separator. The system includes a cylinder block 102, a liquid-particle multiplication oil-gas separator 103, and a filter-type oil-gas separator 104. The oil-gas output end of the cylinder block 102 is connected to the air inlet 7 of the liquid-particle multiplication oil-gas separator 103 via an oil-gas passage. The oil-gas passage is used to stably supply the oil-gas mixture to be separated to the liquid-particle multiplication oil-gas separator 103. The air outlet 6 of the liquid-particle multiplication oil-gas separator 103 is connected to another high-pressure... The pressure pipe is connected to the input flange of the filter cotton type oil-gas separator 104, and is used to transport the oil and gas, which has been pre-separated by the liquid particle multiplication oil-gas separator 103 and has had some oil droplets removed, to the filter cotton type oil-gas separator 104 for secondary separation. The filter cotton type oil-gas separator 104 is equipped with high-efficiency filter cotton, which can capture the tiny oil droplets remaining in the oil and gas through the centrifugal action of the rotor, and finally achieve oil-gas separation. The separated clean gas is transported to the booster for use, and the separated oil is returned to the compressor for reuse through the oil return device.

[0034] Those skilled in the art will recognize that numerous variations are possible with respect to the above description, and the embodiments and figures are merely for describing one or more specific implementations.

[0035] Although exemplary embodiments of the invention have been described and illustrated, those skilled in the art will understand that various changes and substitutions can be made thereto without departing from the spirit of the invention. Furthermore, many modifications can be made to adapt specific situations to the doctrine of the invention without departing from the central concepts of the invention described herein. Therefore, the invention is not limited to the specific embodiments disclosed herein, but may include all embodiments and equivalents that fall within the scope of the invention.

Claims

1. A liquid-particle multiplication oil-gas separation device, comprising a shell (1) and a cover plate (2), characterized in that: It also includes a separation device (3), which includes a first impact plate (31), a second impact plate (32), and an oil molecule aggregation cotton (33); the cover plate (2) and the shell (1) are detachably connected to form a separation chamber (4), the shell (1) is provided with an air outlet (6), and the cover plate (2) is provided with an air inlet (7); the first impact plate (31) and the second impact plate (32) are arranged sequentially along the oil and gas flow direction in the separation chamber (4), and the separation chamber (4) is sequentially divided into a first separation chamber (41), a second separation chamber (42), and a third separation chamber (43), and both the first impact plate (31) and the second impact plate (32) are provided with liquid particle multiplication holes (5); the oil molecule aggregation cotton (33) is installed in the second separation chamber (42) to filter oil droplet particles in the oil and gas mixture.

2. The liquid-particle multiplication oil-gas separation device as described in claim 1, characterized in that: The air inlet (7) is connected to the first separation chamber (41). The air inlet (7) is composed of several air inlets with the same diameter. The lowest air inlet serves as the oil outlet (8) of the liquid particle multiplication oil-gas separator (103). The lowest point of the oil outlet (8) is flush with the bottom of the separation chamber (4), which allows the oil that has accumulated at the bottom of the separation chamber (4) to flow back to the mounting tank from the oil outlet (8).

3. The liquid-particle multiplication oil-gas separation device as described in claim 1, characterized in that: The air outlet (6) is connected to the third separation chamber (43), and the air outlet (6) is set at a height higher than the bottom of the third separation chamber (43) to discharge the pre-separated gas.

4. The liquid-particle multiplication oil-gas separation device as described in claim 1, characterized in that: There are several liquid particle multiplication holes (5), which are distributed in a rectangular array on the first impact plate (31) and the second impact plate (32).

5. The liquid-particle multiplication oil-gas separation device as described in claim 1, characterized in that: The bottom of the first impact plate (31) and the second impact plate (32) are both provided with oil return ports (9).

6. The liquid-particle multiplication oil-gas separation device as described in claim 1, characterized in that: It also includes a baffle (101), which is located between the first impact plate (31) and the oil molecule aggregation cotton (33). Its upper end is fixedly connected to the top of the inner wall of the shell (1), and its lower end is left with an oil and gas flow gap between it and the bottom of the inner wall of the shell (1). The baffle (101) is arranged parallel to the impact plate.

7. The liquid-particle multiplication oil-gas separation device as described in claim 1, characterized in that: There are two baffles (101), namely a first baffle (1011) and a second baffle (1012). The first baffle (1011) is installed in the second separation chamber (42); the second baffle (1012) is installed in the third separation chamber (43).

8. An oil-gas separation system comprising the liquid-particle multiplication oil-gas separation device of claim 1, characterized in that: The oil-gas separation system includes a cylinder block (102), a liquid-particle multiplication oil-gas separator (103), and a filter cotton oil-gas separator. The oil-gas output end of the cylinder block (102) is connected to the input end of the liquid-particle multiplication oil-gas separator (103) for conveying the oil and gas to be separated to the liquid-particle multiplication oil-gas separator (103). The output end of the liquid-particle multiplication oil-gas separator (103) is connected to the input end of the filter cotton oil-gas separator for conveying the oil and gas pre-separated by the liquid-particle multiplication oil-gas separator (103) to the filter cotton oil-gas separator (104) for secondary separation.

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