Oil gas recovery device

Abstract

The utility model relates to an oil gas recovery device which comprises a shell, a gas inlet pipe and a gas outlet pipe are respectively arranged at two ends of the shell, a central pipe body with only one open end is arranged in the shell, the open end of the central pipe body penetrates out of the shell, and a gas separation membrane is coated on the outer side pipe wall of the central pipe body. A gas channel for enabling gas to pass through the gas separation membrane is arranged in the shell, and a plurality of small gas passing holes are formed in the surface, in contact with the gas separation membrane, of the central pipe body. According to the oil gas recovery device, the gas separation membrane is wrapped on the outer side pipe wall of the central pipe body, the gas channel for enabling gas to pass through the gas separation membrane is arranged in the shell, and a plurality of small gas passing holes are formed in the surface, in contact with the gas separation membrane, of the central pipe body, so that negative pressure balance at all positions of the gas separation membrane is realized; the maximum contact area of the gas separation membrane and the organic gas can be realized, and the recovery efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field of oil and gas recovery, in particular to an oil and gas recovery device. Background Art

[0002] Oil and gas recovery is the process of collecting volatile organic mixed gases generated in the production process and after chemical combination, and converting the oil and gas from gas to liquid and then back to gasoline through one or more methods such as absorption, adsorption and condensation, thereby achieving the purpose of reducing oil and gas pollution and recycling it.

[0003] Patent application number CN117160197A is entitled Organic Gas Separation Membrane Device, Figure 1 As shown, an air inlet pipe 2 and an exhaust pipe 3 are respectively provided at both ends of the cylinder 1, and a negative pressure pipe 4 is arranged inside the cylinder 1. During recovery, negative pressure is drawn at the negative pressure pipe 4, and the oil and gas to be processed enter from the air inlet pipe 2 and are recovered through the gas separation membrane 5. The gas separation membrane 5 is tubular, and one end of the gas separation membrane 5 is connected with the negative pressure pipe 4. The gas passing through the gas separation membrane 5 is discharged from the negative pressure pipe 4, and the clean air is discharged from the exhaust pipe 3. In this technology, since the negative pressure pipe 4 is connected with the gas separation membrane 5, the negative pressure at the mouth of the negative pressure pipe 4 is large, and the negative pressure at a distance is small, which will result in a better separation effect of the oil and gas only when they reach the exhaust pipe 3, resulting in a lot of oil and gas being discharged from the exhaust pipe 3 before separation, and the separation effect is poor. Utility Model Content

[0004] The embodiment of the utility model provides an oil and gas recovery device, which adopts a flat rolled membrane structure. The structure is most consistent with the working mechanism of the gas separation membrane, and the effective use area of ​​the membrane is the largest and the efficiency is the highest.

[0005] In order to achieve the above purpose, the embodiment of the utility model provides the following technical solutions:

[0006] An oil and gas recovery device includes a shell, wherein both ends of the shell are provided with an air inlet pipe and an exhaust pipe, a central tube body with only one end open is provided in the shell, the open end of the central tube body passes through the shell, a gas separation membrane is coated on the outer tube wall of the central tube body, an air passage for gas to pass through the gas separation membrane is provided in the shell, and a plurality of gas holes are provided on the surface of the central tube body in contact with the gas separation membrane. The gas separation membrane adopts a flat rolled membrane structure, which is coated on the surface of the central tube body, and a plurality of gas holes of the same size are provided on the central tube body, and the pressure of each gas hole is the same, so that the organic mixed gas can be more fully dissolved in the gas separation membrane. This structure is most consistent with the working mechanism of the gas separation membrane, and the effective area of ​​the gas separation membrane is the largest and the efficiency is the highest.

[0007] Furthermore, end plates are provided at both ends of the gas separation membrane, and through holes are provided on the end plates for allowing gas to pass through the gas separation membrane. The end plates divide the interior of the shell into three areas, and the middle of the shell is divided into a membrane separation area. An air inlet area and an air outlet area are provided on both sides of the membrane separation area. The organic mixed gas can only pass through the through holes, and the through holes guide the gas to the gas separation membrane, so that the organic mixed gas is in full contact with the gas separation membrane.

[0008] Furthermore, the end plate is perpendicular to the central tube body, and the gas separation membrane is composed of multiple layers of organic gas permeable membranes stacked and rolled. The end plate is perpendicular to the gas separation membrane, and guides the organic mixed gas into the gaps between the multiple gas separation membranes, so that the organic mixed gas is fully in contact with the gas separation membrane.

[0009] Furthermore, the pore diameter of the through hole is smaller than the thickness of the gas separation membrane.

[0010] Furthermore, one or both ends of the central tube body are fixedly connected to the shell, and a flexible tube body is provided on the central tube body on the outer side of the gas separation membrane. When the device is connected to a vibration-generating device such as a vacuum pump or a compressor, the gas separation membrane part of the central tube body is flexibly connected to the shell, which can effectively prevent shock and avoid high-frequency vibration.

[0011] Furthermore, a gas concentration detection area is provided at the exhaust pipe. A gas concentration sensor is provided in the gas concentration detection area, and the collected signal is transmitted to the host computer, which analyzes the gas concentration and compares it with the relevant threshold value to detect the organic gas concentration at the exhaust pipe of the device. If the concentration exceeds the standard, an alarm is issued, indicating that the gas separation membrane needs to be replaced.

[0012] Furthermore, a temperature sensor for measuring the air inlet pipe is provided in the shell, and the shell is a double-layer hollow structure, and a water inlet and a water outlet are provided on the upper and lower sides of the shell respectively. When the membrane assembly is installed inside the device, high temperature may be generated inside the device, and a temperature sensor is used to detect the temperature of the air inlet end in the shell. If the temperature exceeds the standard, the shell needs to be cooled. The double-layer shell has a heat insulation effect, and the temperature is cooled by water cooling in the double-layer shell.

[0013] Furthermore, a water cooling channel is provided between the double layers of the shell, and two ends of the water cooling channel are respectively connected to a water inlet and a water outlet.

[0014] The utility model embodiment has the following advantages:

[0015] An oil and gas recovery device of the utility model covers a gas separation membrane on the outer tube wall of a central tube body, an air passage for gas to pass through the gas separation membrane is provided in the shell, and a plurality of small gas holes are provided on the surface of the central tube body in contact with the gas separation membrane, so as to realize negative pressure balance at various positions of the gas separation membrane, realize the maximum contact area between the gas separation membrane and the organic gas, and have high recovery efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0017] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0018] Figure 1 It is the internal structure diagram of the oil and gas recovery device in the prior art;

[0019] Figure 2 An internal structure diagram of an oil and gas recovery device provided by an embodiment of the utility model;

[0020] Figure 3 An internal structure diagram of another oil and gas recovery device provided by an embodiment of the utility model;

[0021] Figure 4 A diagram of a gas concentration detection system of another oil and gas recovery device provided by an embodiment of the utility model;

[0022] Figure 5 A temperature detection system diagram of another oil and gas recovery device provided in an embodiment of the utility model.

[0023] In the figure:

[0024] 1. Cylinder; 2. Inlet pipe; 3. Exhaust pipe; 4. Negative pressure pipe; 5. Gas separation membrane; 6. Shell; 7. Central tube body; 8. End plate; 9. Through hole; 10. Flexible tube body; 11. Gas concentration sensor; 12. Host computer; 13. Alarm module; 14. Temperature sensor; 15. Water cooling circulation device. DETAILED DESCRIPTION

[0025] The following is a specific embodiment of the present invention. People familiar with the technology can easily understand the other advantages and functions of the present invention from the contents disclosed in this specification. Obviously, the described embodiment is a part of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] like Figure 2 As shown, an oil and gas recovery device includes a shell 6, wherein an air inlet pipe 2 and an exhaust pipe 3 are respectively provided at both ends of the shell 6, a central tube body 7 with only one end open is provided in the shell 6, the open end of the central tube body 7 passes through the shell 6, a gas separation membrane 5 is coated on the outer tube wall of the central tube body 7, an air passage for gas to pass through the gas separation membrane 5 is provided in the shell 6, and a plurality of small air holes are provided on the surface of the central tube body 7 in contact with the gas separation membrane 5.

[0027] Both ends of the gas separation membrane 5 are provided with end plates 8, and the end plates 8 are provided with through holes 9 for gas to pass through the gas separation membrane 5. The end plates 8 divide the interior of the shell 6 into three areas. The end plates 8 are connected to the shell 6 through a Y-shaped sealing ring, and the inner side of the end plates 8 can be an integral structure with the central tube 7 or a detachable fixed structure such as a threaded connection.

[0028] The end plate 8 is perpendicular to the central tube 7 . The gas separation membrane 5 is composed of multiple layers of organic gas permeable membranes stacked and rolled. Preferably, the aperture of the through hole 9 is smaller than the thickness of the gas separation membrane 5 .

[0029] One or both ends of the central tube body 7 are fixedly connected to the housing 6. A flexible tube body 10 is provided on the central tube body 7 outside the gas separation membrane 5. The flexible tube body 10 is provided in the air inlet area and the air outlet area so that the two areas form a buffer zone. Figure 3 As shown, in the figure, both ends of the central tube body 7 are fixedly connected to the shell 6, and flexible tube bodies 10 are arranged in the buffer zones on both sides of the central tube body 7, so that a flexible connection is formed between the middle area of ​​the central tube body 7 and the areas on both sides.

[0030] like Figure 4 As shown, a gas concentration detection area is provided at the exhaust pipe 3, and a gas concentration sensor 11 is provided in the gas concentration detection area. The gas concentration sensor 11 is connected to a host computer 12. The host computer 12 collects gas concentration signals and compares them with a concentration threshold. If the concentration exceeds the threshold, the alarm module 13 is controlled to issue an early warning.

[0031] like Figure 5As shown, a temperature sensor 14 for measuring the air inlet pipe 2 is provided in the shell 6, and the shell 6 is a double-layer hollow structure. A water inlet and a water outlet are provided on the upper and lower sides of the shell 6, respectively, and the water inlet and the water outlet are connected to a water cooling circulation device 15. The temperature sensor 14 is connected to the host computer 12, and the host computer 12 collects the temperature signal and compares it with the temperature threshold. If it exceeds the standard, the alarm module 13 is controlled to issue an early warning, and the circulating cold water device is controlled to discharge water to cool the shell 6 by water.

[0032] A water cooling channel is provided between the double layers of the shell 6, and the two ends of the water cooling channel are respectively connected to the water inlet and the water outlet. The water cooling channel can be a channel rotating around the shell 6, an S-shaped channel, a parallel channel or other structures.

[0033] During specific use, the organic mixed gas enters the shell 6 from the intake pipe 2, and is guided to the gap of the gas separation membrane 5 through the through hole 9 of the end plate 8. The molecules of the organic mixed gas dissolve on the surface of the gas separation membrane 5, and then the negative pressure provided by the central tube body 7 causes the separated high-concentration organic gas to flow into the central tube body 7 through the gas holes for centralized recovery, and the low-concentration gas that meets the standards is discharged through the exhaust pipe 3.

[0034] Although the utility model has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the utility model. Therefore, these modifications or improvements made without departing from the spirit of the utility model are within the scope of protection claimed by the utility model.

Claims

1. An oil and gas recovery device, comprising a shell, with an air inlet pipe and an exhaust pipe respectively disposed at both ends of the shell, characterized in that: A central tube body with only one end open is provided in the shell, the open end of the central tube body passes through the shell, a gas separation membrane is coated on the outer tube wall of the central tube body, an air passage for gas to pass through the gas separation membrane is provided in the shell, and a plurality of gas holes are provided on the surface of the central tube body in contact with the gas separation membrane; The exhaust pipe is provided with a gas concentration detection area, in which a gas concentration sensor is provided, and the gas concentration sensor is connected to a host computer, which collects gas concentration signals and compares them with a concentration threshold value. If the concentration exceeds the threshold, the alarm module is controlled to issue an early warning. A temperature sensor for measuring the air intake pipe is provided in the shell. The shell is a double-layer hollow structure. A water inlet and a water outlet are provided on the upper and lower sides of the shell respectively. The water inlet and the water outlet are both connected to a water cooling circulation device. The temperature sensor is connected to a host computer. The host computer collects temperature signals and compares them with the temperature threshold. If the temperature exceeds the threshold, the alarm module is controlled to issue an early warning, and the circulating cold water device is controlled to discharge water to cool the shell.

2. The oil vapor recovery device according to claim 1, characterized in that: End plates are provided at both ends of the gas separation membrane. Through holes are provided on the end plates for allowing gas to pass through the gas separation membrane. The end plates divide the interior of the shell into three areas.

3. The oil and gas recovery device according to claim 2, characterized in that: The end plate is perpendicular to the central tube body, and the gas separation membrane is composed of multiple layers of organic gas permeable membranes which are stacked on each other and formed by rolling.

4. The oil vapor recovery device according to claim 2, characterized in that: The pore diameter of the through hole is smaller than the thickness of the gas separation membrane.

5. The oil vapor recovery device according to claim 1, characterized in that: One end or both ends of the central tube body are fixedly connected to the shell, and a flexible tube body is provided on the central tube body outside the gas separation membrane.

6. The oil vapor recovery device according to claim 1, characterized in that: A water cooling channel is provided between the double layers of the shell, and two ends of the water cooling channel are respectively connected to a water inlet and a water outlet.

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