An oil and gas recovery and separation device

Abstract

This utility model relates to the field of oil and gas recovery and separation, specifically disclosing an oil and gas recovery and separation device, including a primary condenser and a separation tank. The primary condenser is vertically designed and located above the separation tank. The primary condenser contains a condenser tube arranged in a double-layer spiral configuration. An inlet pipe is located on one side of the bottom of the primary condenser, and an exhaust pipe is located on one side of the top. The bottom of the primary condenser is connected to the top of the separation tank via a conveying pipeline. A drain pipe is connected to the bottom of the separation tank. Temperature measuring thermocouples are respectively installed on the inlet and exhaust pipes. This utility model can achieve oil-water separation and preliminary recovery of oil and gas. The double-layer spiral condenser tube structure improves the heat exchange area and efficiency, and can effectively handle oil and gas condensation blockage in a single tank, improving safety. By connecting multiple secondary condensers in series with the primary condenser, multiple oil and gas components can be recovered, expanding the applicability.

Description

Technical Field

[0001] This utility model relates to the field of oil and gas recovery and separation, specifically an oil and gas recovery and separation device. Background Technology

[0002] Oil and gas mainly refer to mixed oil and gas produced in chemical production, containing saturated hydrocarbons, aromatic hydrocarbons, olefins, and small amounts of heteroatom compounds such as nitrogen, oxygen, and sulfur. Common oil and gas treatment methods include condensation, adsorption, absorption, membrane separation, and combustion. After some oil and gas is treated, it is released into the atmosphere, causing resource waste and safety hazards.

[0003] Among them, adsorption can treat low-concentration oil and gas, but the adsorbent is not easy to desorb after adsorption saturation, and it still needs to be treated as hazardous waste; absorption can absorb high-concentration oil and gas with liquid solvents, but it is easy to waste solvents and the absorbent is difficult to treat; membrane separation technology can recover oil and gas, but the cost is high and the applicable scenarios are limited; combustion is easy to waste resources, and the exhaust gas produced by combustion will still cause air pollution. Untreated flammable and explosive oil and gas can also cause safety accidents such as fires and explosions.

[0004] In existing technologies, condensation technology is often used for oil and gas recovery. For example, patent CN219743957U introduces an oil and gas condensation recovery system that integrates the condensation chamber and the collection chamber. However, in actual operation, it is not possible to achieve separate control of condensation and recovery, resulting in poor flexibility. Furthermore, it cannot simultaneously meet the recovery of multiple oil and gas components. Moreover, the horizontal tank design is not conducive to the outflow of oil. If condensation blockage occurs in a certain chamber, it cannot be handled separately. The single-layer condensation coil used has a small contact area and poor cooling efficiency.

[0005] Based on this, the inventors proposed an oil and gas recovery and separation device. Summary of the Invention

[0006] The purpose of this invention is to provide an oil and gas recovery and separation device that can achieve oil-water separation and preliminary recovery of oil and gas. Through the design of two independent tanks—a primary condenser and a separation tank—and the design of each valve, individual control is possible, offering high flexibility and enabling the condensation and recovery of oil and gas. The double-layer spiral condenser tube structure design improves the heat exchange area and efficiency, and can effectively handle oil and gas condensation blockage in a single tank, enhancing safety and operability during the recovery process. Furthermore, multiple secondary condensers can be connected in series with the primary condenser to achieve the recovery of multiple oil and gas components, expanding its applicability.

[0007] To solve the above-mentioned technical problems, this utility model provides an oil and gas recovery and separation device, including a primary condenser and a separation tank. The primary condenser is vertically designed and located above the separation tank. A condenser tube is provided inside the primary condenser, and the condenser tube is arranged in a double-layer spiral. An air inlet pipe is provided on one side of the bottom of the primary condenser, and an exhaust pipe is provided on one side of the top. The air inlet pipe is connected to an exhaust gas inlet pipe, and the exhaust pipe is connected to an exhaust gas outlet pipe. The bottom of the primary condenser is connected to the top of the separation tank through a conveying pipe. A transparent connecting pipe is provided on one side of the separation tank, and the two ends of the transparent connecting pipe are respectively connected to the upper and lower parts of the separation tank. A liquid level gauge is installed on the transparent connecting pipe, and a drain pipe is connected to the bottom of the separation tank.

[0008] The air inlet pipe 1 and the air outlet pipe 1 are respectively equipped with temperature measuring thermocouples. The exhaust gas inlet pipe is equipped with valve 1, the exhaust gas outlet pipe is equipped with valve 2, the conveying pipe is equipped with valve 3, and the liquid discharge pipe 1 is equipped with valve 4.

[0009] Furthermore, the top of the primary condenser is equipped with a nitrogen pipeline, a pressure gauge, and a safety valve. The nitrogen pipeline is equipped with a valve. The top of the separator is equipped with a pressure gauge and a safety valve.

[0010] Furthermore, it also includes several secondary condenser tanks connected in series on the exhaust gas outlet pipeline. Each secondary condenser tank is equipped with a second condenser tube, which is arranged in a double-layer spiral. Each secondary condenser tank is equipped with an air inlet pipe on one side of the bottom, an exhaust pipe on one side of the top, and a liquid drain pipe on the bottom. Temperature measuring thermocouples are respectively installed on the air inlet pipe and the exhaust pipe.

[0011] Furthermore, the top of the secondary condenser is equipped with a nitrogen pipeline 2, a pressure gauge 3, and a safety valve 3. A valve 6 is installed on the nitrogen pipeline 2, and a valve 7 is installed on the drain pipeline 2.

[0012] Furthermore, the bottom of the separation tank is inverted conical.

[0013] Furthermore, the first intake pipe is connected to the exhaust gas intake pipe via a flange, and the first exhaust pipe is connected to the exhaust gas outlet pipe via a flange.

[0014] Furthermore, the separation tank is equipped with a temperature measuring device, and the outer side of the separation tank is equipped with a jacket.

[0015] The beneficial effects of this utility model are:

[0016] This utility model's oil and gas recovery and separation device can achieve oil-water separation and preliminary oil and gas recovery. Through the design of two independent tanks, a primary condenser and a separation tank, combined with the design of each valve, it can be controlled independently, which is highly flexible and can realize the condensation and recovery of oil and gas. Specifically, the vertical structure of the primary condenser and its location above the separation tank facilitates the flow of the condensed liquid phase from the primary condenser. The liquid is discharged by its own gravity, saving energy consumption. Combined with the separation tank, it can perform preliminary separation of oil and water, improving the oil and gas recovery efficiency.

[0017] Furthermore, the double-layer spiral condenser tube design within the primary condenser significantly increases the heat exchange area and efficiency compared to a standard single-layer spiral condenser tube, indirectly improving the condensation effect and facilitating the recovery of oil and gas. Combined with the thermocouple design, the condensation effect within the primary condenser can be reflected by detecting the temperatures in the inlet and outlet pipes. The condensation temperature can be controlled by regulating the temperature of the medium entering the condenser tubes, allowing for the recovery of oil and gas components with different boiling points. Increasing the medium temperature also prevents material blockage within the primary condenser. A jacket is designed outside the separator, and the temperature of the medium flowing through the jacket controls the internal temperature of the separator, preventing condensation of recovered oil and subsequent pipe blockage. The transparent connecting pipe and level gauge facilitate liquid level observation. The use of nitrogen and safety valves ensures safe operation of the device.

[0018] The oil and gas recovery and separation device of this utility model can achieve oil and gas separation within different condensation point ranges by connecting multiple secondary condensing tanks in series on the exhaust gas outlet pipeline, thereby improving the recovery of oil and gas of different components. It has a wide range of applications, and the flanged pipeline connection design makes maintenance more convenient. Attached Figure Description

[0019] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of the oil and gas recovery and separation device according to Embodiment 1 of this utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the secondary condenser of Embodiment 2 of this utility model;

[0022] In the diagram: 1-First-stage condenser, 2-Separation tank, 3-Condenser pipe 1, 4-Inlet pipe 1, 5-Exhaust pipe 1, 6-Waste gas inlet pipe, 61-Valve 1, 7-Waste gas outlet pipe, 71-Valve 2, 8-Transfer pipe, 81-Valve 3, 9-Transparent connecting pipe, 10-Level gauge, 11-Drainage pipe 1, 111-Valve 4, 12-Nitrogen pipe 1, 121-Valve 5, 13-Pressure gauge 1, 14-Safety valve 1, 15-Pressure gauge 2, 16-Safety valve 2, 17-Second-stage condenser, 18-Condenser pipe 2, 19-Inlet pipe 2, 20-Exhaust pipe 2, 21-Drainage pipe 2, 22-Nitrogen pipe 2, 23-Pressure gauge 3, 24-Safety valve 3, 221-Valve 6, 211-Valve 7, 100-Thermocouple 1, 200-Thermocouple 2. Detailed Implementation

[0023] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model. Example 1

[0024] like Figure 1 As shown, an oil and gas recovery and separation device includes a primary condenser tank 1 and a separation tank 2. The primary condenser tank 1 is vertically designed and located above the separation tank 2. A condenser pipe 3 is installed inside the primary condenser tank 1, and the condenser pipe 3 is arranged in a double-layer spiral. An inlet pipe 4 is provided on one side of the bottom of the primary condenser tank 1, and an exhaust pipe 5 is provided on one side of the top. The inlet pipe 4 is connected to an exhaust gas inlet pipe 6, and the exhaust pipe 5 is connected to an exhaust gas outlet pipe 7. The bottom of the primary condenser tank 1 is connected to the top of the separation tank 2 via a conveying pipe 8. One side of the separator 2 is connected to a transparent connecting pipe 9. The two ends of the transparent connecting pipe 9 are connected to the upper and lower parts of the separator 2 respectively. A level gauge 10 is installed on the transparent connecting pipe 9. The bottom of the separator 2 is connected to a drain pipe 11. Temperature measuring thermocouples 100 are installed on the inlet pipe 4 and the outlet pipe 5 respectively. A valve 61 is installed on the exhaust gas inlet pipe 6. A valve 71 is installed on the exhaust gas outlet pipe 7. A valve 81 is installed on the conveying pipe 8. A valve 111 is installed on the drain pipe 11.

[0025] This utility model's oil and gas recovery and separation device, through the design of each valve, makes the entire recovery system closed, reducing oil and gas emissions and environmental pollution. The vertical structure of the primary condenser, positioned above the separator, facilitates the outflow of the condensed liquid phase from the primary condenser, utilizing gravity for energy saving. Combined with the separator, it allows for preliminary oil-water separation, improving oil and gas recovery efficiency. Furthermore, the primary condenser's double-layer spiral condenser tube design significantly increases the heat exchange area and efficiency compared to a standard single-layer spiral condenser tube. The thermocouple design monitors the temperature in the inlet and outlet pipes, reflecting the condensation effect. Controlling the temperature of the medium entering the condenser tubes controls the condensation temperature, enabling the recovery of oil and gas components with different boiling points. Increasing the medium temperature also prevents blockage within the primary condenser. The transparent connecting pipe and level gauge facilitate observation of the liquid level, and the transparent connecting pipe allows for the recovery of the oil phase once it is visible in the oil and gas recovery tank.

[0026] Specifically, in this embodiment, the top of the primary condenser 1 is equipped with a nitrogen pipeline 12, a pressure gauge 13, and a safety valve 14. The nitrogen pipeline 12 is equipped with a valve 121. The top of the separator 2 is equipped with a pressure gauge 15 and a safety valve 16. Here, the design of the nitrogen pipeline 1 prevents overpressure accidents caused by blockage in the primary condenser, and the nitrogen supply is used for explosion protection. The design of the safety valves 14 and 16 ensures that gas is discharged promptly after system overpressure, ensuring safety.

[0027] Specifically, in this embodiment, the bottom of the separation tank 2 is inverted conical, which makes it easier for the liquid to concentrate and be discharged, thereby improving the separation efficiency. By providing a temperature measuring device inside the separation tank 2 and a jacket (not shown in the figure) on the outside of the separation tank 2, the temperature inside the separation tank can be measured. The temperature inside the separation tank can be controlled by the medium introduced into the jacket to prevent the recovered oil from condensing. Specifically, a heating medium can be introduced into the jacket.

[0028] Specifically, in this embodiment, the intake pipe 4 is connected to the exhaust gas intake pipe 6 by a flange, and the exhaust pipe 5 is connected to the exhaust gas outlet pipe 7 by a flange. The flange connection design facilitates installation or disassembly. Here, the flange connection involves first fixing each of the adjacent pipes to a flange, then using a flange gasket between the two flanges, and finally fastening the two flanges together with bolts to complete the connection.

[0029] The working principle of Example 1 is as follows:

[0030] For example: a group of oil and gas with a condensation point of 25~30℃, according to the required temperature of the condensation section of the separated oil and gas, condensate at the condensation point temperature of the oil and gas is introduced into the condenser pipe 3, and the temperature of the inlet pipe 4 and the exhaust pipe 5 is reduced to 24℃ by the detection of the temperature measuring thermocouple 100.

[0031] Open valve 2 (71) and valve 3 (81), close valve 5 (121) and valve 4 (111), and then open valve 1 (61). The oil and gas exhaust gas can be pumped from the exhaust gas inlet pipe 6 to the first-stage condenser 1. The temperature of the oil and gas at the inlet is measured by the thermocouple 100 on the inlet pipe 1 (4). Adjust the temperature of the condensate so that the temperature measured by the thermocouple 100 on the exhaust pipe 1 (5) is slightly lower than the condensation point of the oil and gas. Of course, a sampling device can be connected after valve 2 (71) to sample and measure the concentration of the oil and gas discharged. If the concentration does not meet the standard, the temperature can be lowered until the concentration of the oil and gas discharged meets the requirements.

[0032] The liquid level in the separator tank 2 is observed through the transparent connecting pipe 9 and the level gauge 10. When the liquid level is high, valve 3 81 is closed and valve 4 111 is opened. The discharged water phase is sent to the sewage treatment system through the water collection tank. After the water phase is completely discharged, the discharged oil phase is recovered through the oil and gas recovery tank. After the liquid in the separator tank 2 is completely discharged, valve 4 111 is closed and valve 3 81 is opened. The liquid condensed by the primary condenser 1 is recovered through the conveying pipeline 8.

[0033] If condensation occurs in separator 2 during the recovery process, a high-temperature medium can be introduced into the jacket of the separator to melt the condensate. If condensation blockage occurs in the primary condenser 1, valves 61 and 71 can be temporarily closed, valve 121 on nitrogen pipeline 12 can be opened to introduce nitrogen for protection, and the temperature of the condensate in condenser pipe 3 can be raised. After the material in the condenser melts and enters separator 2 through the conveying pipeline 8, the temperature of the condensate at the oil-gas condensation point is restored. Then, valve 121 is closed, valves 61 and 71 are opened, and operation can continue. Example 2

[0034] Unlike Example 1, the oil and gas recovery and separation device also includes several secondary condenser tanks 17 connected in series on the exhaust gas outlet pipeline 7. The secondary condenser tanks cool and recover oil with a lower freezing point at a lower condensate temperature.

[0035] Specifically, each secondary condenser 17 is equipped with a condenser tube 2 18, which is arranged in a double-layer spiral. Each secondary condenser 17 is equipped with an air inlet pipe 2 19 on one side of the bottom, an exhaust pipe 20 on one side of the top, and a drain pipe 21 at the bottom. Temperature measuring thermocouples 200 are respectively installed on the air inlet pipe 2 19 and the exhaust pipe 20. The top of the secondary condenser 17 is equipped with a nitrogen pipe 2 22, a pressure gauge 3 23, and a safety valve 3 24. A valve 6 221 is installed on the nitrogen pipe 2 22, and a valve 7 211 is installed on the drain pipe 2 21.

[0036] Specifically, such as Figure 2 As shown, in this embodiment, a secondary condenser 17 is connected in series on the exhaust gas outlet pipe 7 of the primary condenser 1. This can be used to separate two sets of oil and gas with different condensation points. Here, the secondary condenser 17 does not need to have a separation tank at the bottom, because the moisture has already been removed by the primary condensation recovery system described above.

[0037] The working principle of Example 2 is as follows:

[0038] For example, an oil and gas component can be divided into oil and gas one (25-30℃) and oil and gas two (15-10℃) based on its condensation point. Oily waste gas is transported from the waste gas inlet pipe 6 to the first-stage condenser 1. Under the cooling effect of the condenser pipe 1, oil and gas one and water vapor condense and enter the separator 2 through the conveying pipe 8 for preliminary separation. Oil and gas one (25-30℃) is obtained from the drain pipe 11 (in this embodiment, the operation method of the first-stage condensation system of the oil and gas recovery and separation device is the same as that of embodiment 1, so the operation process will not be described again). The temperature of the medium in the condenser pipe 3 is controlled to control the gas temperature on the waste gas outlet pipe 7 to be 24℃, which can be specifically measured by the thermocouple 200.

[0039] The gas discharged from the exhaust pipe 5 of the primary condenser 1 (containing oil and gas at 15~10℃ and non-condensable gas) enters the secondary condenser 17 through the exhaust pipe 7 and the inlet pipe 19. The valve 221 on the nitrogen pipe 22 and the valve 211 on the drain pipe 21 are closed. The condensate in the secondary condenser 17 is lowered to a lower temperature by controlling the condenser pipe 18, so that the temperature on the exhaust pipe 20 of the secondary condenser 17 is 9℃ as measured by the thermocouple 200.

[0040] In actual operation, a recovery pipe is connected to the exhaust pipe 20 via a flange. When the valve on the recovery pipe is opened, the non-condensable gas passes through the oil and gas concentration detector. If the exhaust gas detection result still exceeds the standard, the medium temperature in the condenser pipe 28 is adjusted to a lower level until the exhaust gas detection meets the standard. Of course, during the oil and gas recovery process, valve 7 211 needs to be opened to recover the oil and gas.

[0041] Of course, in other embodiments, if the composition is more complex, two or more secondary condensers may be used in series.

[0042] The above-disclosed embodiments are merely two preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An oil and gas recovery separation apparatus, characterized by, The system includes a primary condenser (1) and a separator (2). The primary condenser (1) is vertically designed and located above the separator (2). The primary condenser (1) is equipped with a condenser pipe (3) which is arranged in a double-layer spiral. The primary condenser (1) has an air inlet pipe (4) on one side of its bottom and an exhaust pipe (5) on one side of its top. The air inlet pipe (4) is connected to a waste gas inlet pipe (6), and the exhaust pipe (5) is connected to a waste gas outlet pipe (7). The bottom of the primary condenser (1) is connected to the top of the separator (2) via a conveying pipe (8). The separator (2) has a transparent connecting pipe (9) connected to it on one side. The two ends of the transparent connecting pipe (9) are connected to the upper and lower parts of the separator (2) respectively. A level gauge (10) is installed on the transparent connecting pipe (9). The bottom of the separator (2) is connected to a drain pipe (11). The air inlet pipe (4) and the exhaust pipe (5) are respectively equipped with temperature measuring thermocouples (100), the exhaust gas inlet pipe (6) is equipped with valve one (61), the exhaust gas outlet pipe (7) is equipped with valve two (71), the conveying pipe (8) is equipped with valve three (81), and the drain pipe (11) is equipped with valve four (111).

2. The oil and gas recovery and separation device according to claim 1, characterized in that, The top of the primary condenser (1) is provided with a nitrogen pipeline (12), a pressure gauge (13) and a safety valve (14), and a valve (121) is provided on the nitrogen pipeline (12). The top of the separator (2) is provided with a pressure gauge (15) and a safety valve (16).

3. An oil and gas recovery separation device according to claim 1, wherein, It also includes several secondary condenser tanks (17) connected in series on the exhaust gas outlet pipe (7). Each secondary condenser tank (17) is provided with a second condenser pipe (18). The second condenser pipe (18) is arranged in a double-layer spiral. Each secondary condenser tank (17) is provided with an air inlet pipe (19) on one side of the bottom, an exhaust pipe (20) on one side of the top, and a drain pipe (21) on the bottom. The second air inlet pipe (19) and the second exhaust pipe (20) are respectively provided with a second thermocouple (200).

4. An oil and gas recovery separation device according to claim 3, wherein, The top of the secondary condenser (17) is provided with a nitrogen pipeline (22), a pressure gauge (23) and a safety valve (24). The nitrogen pipeline (22) is provided with a valve (221) and the drain pipeline (21) is provided with a valve (211).

5. An oil and gas recovery separation apparatus as defined in claim 1, wherein, The bottom of the separation tank (2) is inverted cone-shaped.

6. An oil and gas recovery separation apparatus as defined in claim 1, wherein, The first air intake pipe (4) is connected to the exhaust gas intake pipe (6) via a flange, and the first exhaust pipe (5) is connected to the exhaust gas outlet pipe (7) via a flange.

7. An oil and gas recovery separation apparatus as defined in claim 1, wherein, The separation tank (2) is equipped with a temperature measuring device, and the outer side of the separation tank (2) is equipped with a jacket.

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