Multi-stage separation oil-gas separation barrel

Abstract

The blocking device for removing the gaseous liquid drops with the particle size not smaller than 2 micrometers is arranged on the periphery of the oil separation core in a wrapping mode, mixed gas enters the tank body through the gas inlet to achieve first-order separation, then penetrates through the blocking device from bottom to top to achieve second-order separation, and finally flows to the oil separation core to achieve third-order separation. The oil-gas separation efficiency of the oil-gas separation barrel is improved through multi-stage separation, the performance requirement of a traditional oil-gas separator on an oil separation filter element is reduced, the performance dependence on the oil separation filter element is reduced, the consumption cost of the oil separation filter element is further reduced, and the performance of the whole machine is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical equipment, in particular to an oil and gas separation barrel with multi-stage separation. Background Art

[0002] The oil-injected screw compressor will input a certain amount of oil during the operation of the main unit. The oil forms an oil film covering the rotor to achieve cooling and lubrication effects. When the main unit is working, gas will be drawn in. These gases and the oil in the main unit form an oil-gas mixture and are discharged from the main unit at high speed. If the oil in the discharged gas is not separated and reused but directly discharged outside the pump, it will cause environmental pollution and waste of resources. Therefore, the exhaust port of the main unit is connected to the oil-gas separation barrel, the oil in the gas is separated through the oil-gas separation barrel, and the oil outlet of the oil-gas separation barrel is connected to the oil inlet of the main unit. The oil-gas separation barrel sprays oil to the main unit through the oil outlet to achieve oil recycling. The oil-gas mixture is discharged at high speed through the main engine, and the existing oil-gas mixture inlet is mostly tangent to the cross-section of the barrel side wall, so that the oil-gas mixture can rotate at high speed into the barrel for cyclone oil-gas separation. The large oil droplets in the oil-gas mixture are separated due to centrifugal force, and the large oil droplets are gathered at the bottom of the barrel under the action of gravity, while the oil mist formed by the small oil droplets and the gas needs to be further separated from the oil and gas through the oil separation core in the barrel. Since the cyclone oil-gas separation currently performed in the oil-gas separation barrel cannot stably remove most of the oil in the oil-gas mixture, the low separation efficiency directly affects the service life of the oil separation core. Utility Model Content

[0003] The problem to be solved by the utility model is that the traditional oil-gas separation barrel has low separation efficiency, resulting in serious oil separation core consumption. In response to this, a multi-stage separation oil-gas separation barrel is provided, which improves the oil-gas separation efficiency through multi-stage separation, reduces the performance requirements and dependence of the traditional oil-gas separator on the oil filter element, further reduces the consumption cost of the oil filter element, and improves the performance of the whole machine.

[0004] In order to solve the above-mentioned technical problems, the utility model provides a multi-stage separation oil-gas separation barrel, including a tank body and an oil separation core arranged above the inside of the tank body, the outer periphery of the oil separation core is surrounded by a blocking device for removing gaseous droplets, and after the mixed gas enters the tank body through the air inlet to achieve first-order separation, it passes through the blocking device from bottom to top to achieve second-order separation, and finally flows to the oil separation core to achieve third-order separation.

[0005] In a preferred embodiment: the intercepting device is coaxially nested with the oil separator core and spaced a predetermined distance apart, and the top of the intercepting device is tightly connected to the upper part of the interior of the tank body.

[0006] In a preferred embodiment: the tight connection is welding or mechanical connection.

[0007] In a preferred embodiment, the blocking device includes a cylinder shell extending along the height direction of the tank body and a blocking plug detachably sealed on the end of the cylinder shell.

[0008] In a preferred embodiment: a through hole is provided on the axial surface of the blocking plug, and the through hole is filled with a wire mesh for blocking gaseous liquid droplets.

[0009] In a preferred embodiment: the blocking plug is connected to the cylinder shell by bolts.

[0010] In a preferred embodiment, the gaseous liquid droplets are water droplets or oil droplets with a particle size not less than 2 microns.

[0011] In a preferred embodiment: the tank body is a closed pressure container, and an upper cover is installed on its upper end surface. The upper cover is provided with an exhaust port, the lower part of the exhaust port is connected to the oil separator core, and the upper part is connected to the pressure maintaining valve.

[0012] In a preferred embodiment: an oil collecting bin is provided below the oil separation core, the oil collecting bin is filled with cooling lubricating oil, an oil drain port is provided at the bottom, and an oil outlet pipe is inserted into the cooling lubricating oil, the other end of the oil outlet pipe extends and is connected to the oil return hole of the side wall of the tank body, and an oil replenishing port is also provided on the outer side wall of the oil collecting bin.

[0013] In a preferred embodiment: it also includes an oil sight glass used in conjunction with the oil replenishing port, and the oil sight glass is arranged at the same height as the cooling lubricating oil level.

[0014] Compared with the prior art, the technical solution of the utility model has the following beneficial effects:

[0015] The utility model provides an intercepting device for removing gaseous liquid droplets with a particle size of not less than 2 microns around the outer periphery of the oil separator core, thereby improving the oil and gas separation efficiency of the oil and gas separation barrel through multi-stage separation, thereby reducing the performance requirements for the oil separator filter element, alleviating the performance dependence on the oil separator core, reducing the consumption cost of the oil separator core, and improving the performance of the entire machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural perspective view of the utility model;

[0017] Figure 2 It is a structural cutaway diagram of the utility model;

[0018] Figure 3 It is a physical axial view of the utility model. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model.

[0020] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0021] In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installed", "provided with", "installed / connected", "connected", etc. should be understood in a broad sense. For example, "connection" can be a wall-mounted connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be a direct connection or an indirect connection through an intermediate medium. It can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0022] The separation efficiency of the oil-gas separator is an important indicator for evaluating the performance of the oil-injected screw compressor. If the lubricating oil enters the circulation system together with the high-pressure gas, an oil film will be formed on the surface of the heat exchanger, reducing the performance of the heat exchanger and causing a reduction in the lubricating oil circulating into the compressor, affecting the life and reliability of the compressor. Ordinary oil-gas separators use cyclone separation or gravity separation. This one-time separation method has a low separation efficiency and cannot stably remove 99% of the oil in the oil-gas mixture, which in turn places a huge burden on the oil filter element. In actual use, operators need to regularly and frequently replace the oil filter element to maintain the working performance of the compressor. Therefore, how to improve the separation efficiency of the oil-gas separator and reduce the consumption cost of the oil filter element is the most difficult problem facing the market.

[0023] In view of this, this embodiment provides an oil-gas separation barrel capable of achieving multi-stage separation, referring to Figure 1-3As shown, the oil-gas separation barrel is composed of a tank body 11 and an oil separation core 13 arranged above the inside of the tank body 11. The outer periphery of the oil separation core 13 is surrounded by a blocking device 12 for intercepting gaseous liquid droplets. The high-pressure mixed gas enters the tank body 11 through the air inlet and realizes the first-order separation with the help of the centrifugal force generated by the collision. When the initially separated mixed gas passes through the blocking device 12 from bottom to top, it will be blocked by the wire mesh 122-2 filled in the through hole 122-1 at the bottom of the blocking device 12 to realize the second-order separation of gaseous liquid droplets, and finally flows to the oil separation core 13 to realize the third-order separation.

[0024] From the perspective of the combination of the barrel body components, the tank body 11 is a closed pressure vessel, and its appearance configuration includes an upper cover 111 from top to bottom. The upper cover 111 is mechanically connected to the lower barrel-shaped shell 112 to form a sealed tank body 11. The upper cover 111 is provided with an exhaust port 111-1. The lower part of the exhaust port 111-1 is connected to the oil separator core 13, and the upper part thereof is connected to the pressure-maintaining valve. The outer periphery of the oil separator core 13 is surrounded by a blocking device 12 for removing gaseous droplets. The blocking device 12 is coaxially nested with the oil separator core 13 and is arranged at a predetermined distance. The top of the blocking device 12 is tightly connected to the upper cover 111, and the tight connection can be welding or mechanical connection. The interception device 12 is composed of a cylindrical shell 121 extending along the height direction of the tank body 11 and a blocking plug 122 which is detachably sealed at the bottom of the cylindrical shell 121 and tightly connected to the cylindrical shell 121 by bolts. A through hole 122-1 is provided on the axial surface of the blocking plug 122, and a wire mesh 122-2 for intercepting gaseous liquid droplets is filled in the through hole 122-1. An oil-gas separation chamber is provided inside the tank body 11 below the interception device 12. The oil-gas separation chamber is filled with cooling lubricating oil, an oil drain port is provided at the bottom, and an oil outlet pipe is inserted into the cooling lubricating oil. The other end of the oil outlet pipe extends and is connected to the oil return hole on the side wall of the tank body. In addition, an oil replenishment port and an oil sight glass used in conjunction with the oil replenishment port are also installed on the outer wall of the oil-gas separation chamber. The oil sight glass is arranged flush with the cooling lubricating oil liquid level. When the oil and gas separation barrel of the utility model is working, the mixed oil and gas enter the interior of the separation barrel through the mixed oil and gas inlet, the high-speed flowing mixed gas enters the oil and gas separation barrel in the same direction as the tangent direction of the barrel wall to generate centrifugal force, and the gaseous liquid droplets carried in the mixed gas are water droplets or oil droplets with a particle size of not less than 2 microns. Due to the difference in mass, some oil particles with large mass are separated from the gas under the action of centrifugal force, and flow along the barrel wall to the oil collecting bin at the bottom of the barrel. The mixed gas after the first-order separation is gathered at the top of the oil and gas separation chamber. When the mixed gas at the top gathers to a certain volume, the pressure in the cavity increases, and the gas pressure pushes the mixed gas along the through hole 122-1 at the bottom of the blocking device 12 into the accommodating space formed by the blocking device 12 and the oil separation core 13. When the mixed gas passes through the through hole 122-1, the gaseous liquid droplets with a particle size of not less than 2 microns carried by it are blocked by the wire mesh 122-2 to achieve second-order separation. As the continuous mixed gas passes through the screen 122-2, the gaseous droplets quickly condense into large droplets and fall back into the oil collection bin under the action of gravity. The small part of the particle droplets carried in the mixed gas after the second-order separation continue to enter the oil separation core under the pressure difference for third-order separation, and finally discharged out of the barrel through the exhaust port 111-1.

[0025] The above is only a preferred specific implementation method of the utility model, but the design concept of the utility model is not limited to this. Any technician familiar with the technical field who uses this concept to make non-substantial changes to the utility model within the technical scope disclosed by the utility model shall be deemed to infringe the protection scope of the utility model.

Claims

1. A multi-stage separation oil-gas separation barrel, comprising a tank body (11) and an oil separation core (13) arranged above the inside of the tank body, characterized in that: The outer periphery of the oil separation core (13) is surrounded by a blocking device (12) for removing gaseous liquid droplets. After the mixed gas enters the tank body (11) through the air inlet to achieve first-order separation, it passes through the blocking device (12) from bottom to top to achieve second-order separation, and finally flows to the oil separation core (13) to achieve third-order separation.

2. The multi-stage separation oil-gas separation barrel according to claim 1, characterized in that: The intercepting device (12) and the oil separation core (13) are coaxially nested and spaced apart by a predetermined distance, and the top of the intercepting device (12) is tightly connected to the upper part of the interior of the tank body.

3. The multi-stage separation oil-gas separation barrel according to claim 2, characterized in that: The tight connection is welding or mechanical connection.

4. The multi-stage separation oil-gas separation barrel according to claim 3, characterized in that: The blocking device (12) comprises a cylindrical shell (121) extending along the height direction of the tank body (11) and a blocking plug (122) detachably sealed on the end of the cylindrical shell (121).

5. The multi-stage separation oil-gas separation barrel according to claim 4, characterized in that: A through hole (122-1) is provided on the axial surface of the blocking plug (122), and the through hole (122-1) is filled with a wire mesh (122-2) for blocking gaseous liquid droplets.

6. The multi-stage separation oil-gas separation barrel according to claim 4, characterized in that: The blocking plug (122) is connected to the cylinder shell (121) via bolts.

7. The multi-stage separation oil-gas separation barrel according to claim 5, characterized in that: The gaseous liquid droplets are water droplets or oil droplets with a particle size not less than 2 microns.

8. The multi-stage separation oil-gas separation barrel according to claim 1, characterized in that: The tank body (11) is a closed pressure container, and an upper cover is installed on its upper end surface. An exhaust port is arranged on the upper cover. The lower part of the exhaust port is connected to the oil separation core (13), and the upper part is connected to the pressure maintaining valve.

9. The multi-stage separation oil-gas separation barrel according to claim 1, characterized in that: An oil collecting bin is arranged below the oil separation core (13), and the oil collecting bin is filled with cooling lubricating oil. An oil discharge port is arranged at the bottom, and an oil outlet pipe is inserted into the cooling lubricating oil. The other end of the oil outlet pipe extends and is connected to the oil return hole of the side wall of the tank body. The outer wall of the oil collecting bin is also provided with an oil replenishing port.

10. The multi-stage separation oil-gas separation barrel according to claim 9, characterized in that: It also includes an oil sight glass used in conjunction with the oil replenishing port, wherein the oil sight glass is arranged at the same height as the cooling lubricating oil level.

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