Oil gas recovery device

Abstract

The utility model provides an oil gas recovery device which comprises an oil storage tank, a compressor, a condenser and a gas-liquid separator which are sequentially connected, a liquid outlet of the gas-liquid separator is arranged at the bottom of the tank, a filter cartridge is arranged in a tank body, the top of the filter cartridge is opened, a liquid inlet faces the opening, an outer brim is arranged at the opening of the filter cartridge, a first filter screen is arranged at the bottom of the filter cartridge, and a second filter screen is arranged at the bottom of the first filter screen. A protruding ring is arranged on the upper middle portion of the inner wall of the tank body, the outer brim is fixedly connected with the protruding ring, an annular gap is reserved between the side wall of the filter cylinder and the protruding ring, and a plurality of air outlets are formed in the outer brim right opposite to the annular gap. According to the oil-gas separation device, oil-gas recovery and oil-gas separation are achieved, in the gas-liquid separator, gas mixed in filtered oil liquid is discharged to the top of the tank body through the annular gap between the side wall of the filter drum and the side wall of the pipe body and the air outlet hole in the outer edge of the filter drum and finally discharged through the exhaust port instead of being discharged upwards through a first filter screen of the filter drum, and therefore oil-gas separation is achieved. Smooth filtering of oil through the first filter cylinder is guaranteed, and oil-gas separation efficiency is improved.

Description

Technical Field

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

[0002] In the petroleum industry, as volatile light oils such as gasoline volatilize a large amount of oil and gas during production, storage, transportation, sales, use, etc., which diffuse into the air and pollute the environment. Therefore, an oil and gas recovery device needs to be set up to collect the volatilized gasoline oil and gas, and through a condenser, the oil and gas is changed from a gaseous state to a liquid state, and then through a gas-liquid separator, the hydraulic oil and the air mixed therein are separated to achieve the purpose of recovery.

[0003] The function of the gas-liquid separator in the oil and gas recovery device is to separate the liquid gasoline and the gas mixed therein. The principle is to utilize the principle that the oil liquid flows downward by its own gravity and the air is light and flows upward for separation. To ensure the cleanliness of gasoline recovery, a filter screen is set in the gas-liquid separator to filter the oil liquid. However, it is found in production that since there is no exhaust passage for the gas to flow upward in the gas-liquid separator, the separated gas can only flow upward through the filter screen and then be discharged. Therefore, this gas-liquid separator is suitable for a small amount of gas-liquid two-phase separation; if the amount of gas-liquid mixture is large, the oil liquid will occupy the entire filter screen, and the upward-moving gas can only flow upward through the filter screen and collide with the downward-flowing oil liquid, resulting in poor flow and filtration of the oil liquid and affecting the oil and gas separation efficiency. Content of the Utility Model

[0004] In view of this, the utility model aims to provide an oil and gas recovery device to achieve oil and gas recovery and improve the oil and gas separation efficiency.

[0005] To achieve the above object, the technical solution of the utility model is realized as follows:

[0006] An oil and gas recovery device includes a storage oil tank, a compressor, a condenser, and a gas-liquid separator connected in sequence. The liquid outlet of the gas-liquid separator is connected to a liquid collection tank. The gas-liquid separator includes a tank body. The top of the tank body is provided with a liquid inlet and an exhaust port. The liquid inlet is connected to the outlet of the condenser. The liquid outlet of the gas-liquid separator is arranged at the bottom of the tank. A filter cartridge is arranged in the tank body. The top of the filter cartridge is open. The liquid inlet faces the open port. The filter cartridge is provided with an outer eaves at its open port. The bottom of the filter cartridge is provided with a first filter screen. A convex ring is arranged at the middle and upper position of the inner wall of the tank body. The outer eaves and the convex ring are connected and fixed. An annular gap is left between the side wall of the filter cartridge and the convex ring. The outer eaves are provided with a plurality of air outlet holes facing the annular gap.

[0007] Further, the filter cartridge is an inverted conical filter cartridge.

[0008] Further, the side wall of the filter cartridge is not provided with a hole structure.

[0009] Further, the liquid inlet is arranged at the center of the top of the tank body and is opposite to the open end of the filter cartridge.

[0010] Further, a second filter screen is provided under the filter cartridge in the tank body, and needles are tightly arranged upward on the second filter screen.

[0011] Compared with the prior art, the oil and gas recovery device of the present utility model has the following advantages:

[0012] (1) The present utility model realizes oil and gas recovery and separates the oil and gas. In the gas-liquid separator, the filter cartridge collects and filters the oil liquid from the condenser, and discharges the gas mixed in the filtered oil liquid to the top of the tank body through the annular gap between the side wall of the filter cartridge and the side wall of the pipe body and the air outlet holes on the outer eaves of the filter cartridge, and finally discharges it through the exhaust port, rather than discharging it upward through the first filter screen of the filter cartridge, ensuring smooth filtration of the oil liquid through the first filter cartridge and improving the oil and gas separation efficiency.

[0013] (2) In the present utility model, the arrangement of the needles on the second filter screen can puncture the bubbles mixed in the oil liquid, facilitating the discharge of the gas in the bubbles and further improving the oil and gas separation efficiency. Description of the Drawings

[0014] The drawings constituting a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation of the present utility model. In the drawings:

[0015] Figure 1 is a schematic diagram of an oil and gas recovery device according to an embodiment of the present utility model;

[0016] Figure 2 is a schematic diagram of the structure of the gas-liquid separator according to an embodiment of the present utility model;

[0017] Figure 3 is a schematic diagram of the filter cartridge structure in the gas-liquid separator of this embodiment.

[0018] Description of the reference numerals:

[0019] 1 - tank body; 11 - liquid inlet; 12 - exhaust port; 13 - convex ring; 14 - annular gap; 2 - second filter screen; 21 - needles; 3 - filter cartridge; 31 - first filter screen; 32 - side wall; 33 - outer eaves; 34 - air outlet holes; 4 - storage oil tank; 5 - compressor; 6 - condenser; 7 - gas-liquid separator; 8 - liquid collection tank. Detailed Embodiments

[0020] The present utility model will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0021] As Figure 1As shown in the figure, an oil and gas recovery device includes a storage oil tank 4, a compressor 5, a condenser 6, and a gas-liquid separator 7 connected in sequence. The storage oil tank 4 stores oil liquid, and its oil-gas mixture enters the condenser 6 under the action of the compressor, undergoes heat exchange in the condenser 6 to form a two-phase mixture of liquid oil and gas. This two-phase mixture enters the gas-liquid separator 7, and gas-liquid two-phase separation is achieved in the gas-liquid separator 7. The separated gas either enters the next processing unit or is directly discharged into the air, and the separated liquid oil flows out through the liquid outlet of the gas-liquid separator 7 to the liquid collection tank 8 for collection.

[0022] As Figure 2 shown in the figure, the gas-liquid separator 7 includes a tank body 1 supported by a bracket. An inlet 11 is provided at the center of the top of the tank body 1, and an exhaust port 12 is provided beside the inlet 11. The tank body 1 is connected to the condenser 6 through the inlet. The liquid outlet of the gas-liquid separator 7 is provided at the bottom of the tank, and this liquid outlet is connected to the liquid collection tank 8. Inside the tank body 1, a filter cartridge 3 and a second filter screen 2 are sequentially arranged from top to bottom. On the inner wall of the tank body 1, convex rings 13 are provided at the installation positions of the filter cartridge 3 and the second filter screen 2. The filter cartridge 3 and the convex rings 13 are respectively fixed on the corresponding convex rings 13, and needles 21 are tightly arranged upward on the second filter screen 2.

[0023] The structure of the filter cartridge 3 is as Figure 3 shown in the figure. As a whole, it is an inverted conical cylinder structure. Its top is open to form an opening for receiving the gas-liquid two-phase mixture from the inlet. The filter cartridge 3 is provided with an outer eaves 33 at this opening. A first filter screen 31 is provided at the bottom of the filter cartridge 3. Several air outlet holes 34 are provided at one end of the outer eaves 33 close to the opening. The filter cartridge 3 is bolted and fixed to the corresponding convex ring 13 through the outer eaves. A circular gap 14 is left between the side wall 32 of the filter cartridge 3 and the convex ring 13 and the side wall of the tank body 1. The air outlet holes 34 are aligned with the circular gap 14.

[0024] In this device, the oil-gas mixer forms a gas-liquid two-phase mixture after passing through the condenser. This gas-liquid two-phase mixture enters the gas-liquid separator 7 through the inlet 11 and gathers in the filter cartridge 3. Impurities in the mixed liquid are removed through the first filter screen 31 of the filter cartridge 3. During this filtering process, some gas will flow downward together with the oil liquid through the first filter screen. Since a circular gap 14 is formed outside the filter cartridge 3 and the outer eaves of the filter cartridge 3 are provided with air outlet holes 34 aligned with this circular gap 14, a part of the gas moving downward will diffuse into the circular gap 14 and diffuse to the top of the tank body 1 through the air outlet holes 34, and finally be discharged through the exhaust port 12. The remaining part of the gas moving downward continues to move downward. When passing through the second filter screen 2, the bubbles are pricked by the needles 21 to facilitate gas discharge.

[0025] In this utility model, the side wall 32 of the filter cartridge is not provided with a hole structure.

[0026] In the present utility model, the liquid inlet 11 is arranged at the center of the top of the tank body 1 and faces the open end of the filter cartridge 3, so as to facilitate the filter cartridge 3 to collect and filter the oil liquid.

[0027] In the present utility model, when the gas-liquid two-phase mixture is separated by the gas-liquid separator 7, the gas mixed in the oil liquid is discharged to the top of the tank body through the annular gap between the side wall of the filter cartridge and the side wall of the pipe body and the air outlet holes on the outer eaves of the filter cartridge, and is finally discharged through the exhaust port, rather than being discharged upward through the first filter screen of the filter cartridge, ensuring that the oil liquid is smoothly filtered through the first filter cartridge and improving the oil-gas separation efficiency.

[0028] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. An oil and gas recovery device, comprising an oil storage tank (4), a compressor (5), a condenser (6), and a gas-liquid separator (7) connected in sequence, wherein the liquid outlet of the gas-liquid separator (7) is connected to a liquid collecting tank (8), characterized in that: The gas-liquid separator (7) comprises a tank body (1), the top of the tank body (1) is provided with a liquid inlet (11) and an exhaust port (12), the liquid inlet is connected to the outlet of the condenser (6), the liquid outlet of the gas-liquid separator (7) is arranged at the bottom of the tank, a filter cartridge (3) is arranged in the tank body (1), the top of the filter cartridge (3) is open to form an open port, the liquid inlet (11) faces the open port, the filter cartridge (3) is provided with an outer edge (33) at its open port, the bottom of the filter cartridge (3) is provided with a first filter screen (31), a convex ring (13) is provided at the middle and upper part of the inner wall of the tank body (1), the outer edge (33) and the convex ring (13) are connected and fixed, an annular gap (14) is reserved between the side wall (32) of the filter cartridge (3) and the convex ring (13), and the outer edge (33) is provided with a plurality of exhaust holes (34) facing the annular gap (14).

2. The oil vapor recovery device according to claim 1, characterized in that: The filter cartridge (3) is an inverted cone-shaped filter cartridge.

3. The oil vapor recovery device according to claim 1, characterized in that: The side wall (32) of the filter cartridge has no hole structure.

4. The oil vapor recovery device according to claim 1, characterized in that: The liquid inlet (11) is arranged at the center of the top of the tank body (1) and directly facing the open opening of the filter cartridge (3).

5. The oil vapor recovery device according to claim 1, characterized in that: The tank body (1) is provided with a second filter screen (2) directly below the filter cartridge (3), and the second filter screen (2) is tightly provided with needle punctures (21) facing upward.

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