A front-mounted natural gas oil removal drying device

Abstract

The application discloses a front-mounted natural gas oil removal drying device applied to the technical field of oil removal devices, and the natural gas is conveyed into a drying tank body, so that the natural gas is floated in the form of bubbles through a gas surge pipe into a clean water tank, and the flowing direction of the pure water in the clean water tank to the drying tank body effectively prevents the water in the drying tank body from entering the clean water tank along with the bubbles, further effectively prevents oil from entering the clean water tank, realizes the separation of the natural gas and the oil, utilizes the natural gas bubbles which are concentrated and floated by the extension pipe, and drives the pure water in the clean water tank to rise along with the bubbles in the extension pipe by the water guide paddle wheel, so that the natural gas is released from the top end of the extension pipe, the pure water which rises along with the bubbles is overflowed from the top end of the extension pipe, the pure water is effectively prevented from staying in the natural gas release area, the oil which is left on the liquid surface of the pure water is effectively prevented from contacting the natural gas, and the oil removal effect of the natural gas is further improved.

Description

Technical Field

[0001] This invention relates to the field of oil removal equipment technology, and in particular to a pre-positioned natural gas oil removal and drying device. Background Technology

[0002] Natural gas obtained directly from extraction is called wet natural gas. Wet natural gas often contains liquid impurities such as oil and water. Before natural gas is transported, it is necessary to remove these liquid impurities. For example, a natural gas oil removal and drying device disclosed in Chinese patent CN213570355U washes the natural gas with water to remove the oil. The oil floats on the water surface and is then removed by suction. Another example is a natural gas oil removal pre-dryer disclosed in Chinese patent CN220284008U. Since the oil separated from the natural gas floats on the water surface, the natural gas bubbles rising in the water need to pass through the oil layer on the water surface to be released. When the natural gas comes into contact with the oil layer, it is easy to cause re-oil contamination of the natural gas, affecting the oil removal effect. Summary of the Invention

[0003] The core of this invention lies in raising the position of natural gas as it rises and is released by extending the pipe, thereby preventing the natural gas from re-contacting the oil layer and solving the problem in the prior art where the contact between natural gas and the oil layer affects the oil removal efficiency of the natural gas.

[0004] To solve the above problems, the present invention adopts the following technical solution.

[0005] A pre-positioned natural gas oil removal and drying device includes a drying tank. An air inlet pipe is fixedly connected to one end of the bottom of the drying tank. An air surge pipe is fixedly connected to the top of the end of the drying tank near the air inlet pipe. A clean water tank is fixedly connected to the top of the air surge pipe. A clean water inlet pipe is fixedly connected to the bottom of the clean water tank. The height of the clean water tank is the same as the height of the top of the other end of the drying tank. A gas collection cover is fixedly connected to the top of the clean water tank. An air outlet pipe is fixedly connected to the top of the gas collection cover. An extension pipe is fixedly connected to the middle of the air collection cover. The extension pipe is vertically aligned with the air surge pipe, and the bottom end of the extension pipe is flared. The inner end of the clean water inlet pipe passes through the bottom of the flared end of the extension pipe, and the inner end of the clean water inlet pipe faces the air surge pipe vertically. A drive motor is fixedly connected to the top of the air collection cover. A rotating shaft is fixedly connected to the output end of the drive motor. The bottom end of the rotating shaft extends to the flared part of the extension pipe, and a water-guiding impeller is fixedly connected to the outside of the bottom end of the rotating shaft.

[0006] Furthermore, a return gas pipe and an oil drain pipe are fixedly connected from top to bottom at the other end of the drying tank. The outlet end of the return gas pipe is fixedly connected to the inlet gas pipe, and a drain pipe is fixedly connected to the bottom of the other end of the drying tank.

[0007] Preferably, an oil-absorbing cotton disc floats inside the water purification tank, and an extension tube is connected to the oil-absorbing cotton disc.

[0008] Furthermore, the oil-absorbing cotton tray is covered with a protective inner film bag, and the protective inner film bag is covered with a protective outer film bag. A connecting port is fixedly connected between the protective inner film bag and the protective outer film bag, and the connecting port connects the inner film surface of the protective inner film bag and the outer film surface of the protective outer film bag.

[0009] Furthermore, a mesh tube is fixedly embedded in the middle of the oil-absorbing cotton tray, and a return oil pipe is fixedly connected to the converging end of the mesh tube. The return oil pipe passes through the inner protective membrane bag and the outer protective membrane bag in sequence, and the return oil pipe is made of plastic hose. An oil drain hole is opened on the outside of the water tank, and the return oil pipe is fixedly connected to the oil drain hole.

[0010] Furthermore, a water filling pipe and a pressure relief pipe are fixedly connected to the outside of the protective outer membrane bag. Both the water filling pipe and the pressure relief pipe are made of plastic hoses. The end of the water filling pipe away from the protective outer membrane bag is fixedly connected to the clean water inlet pipe, and a water filling valve is fixedly connected to the connection between the water filling pipe and the clean water inlet pipe. Both the protective inner membrane bag and the protective outer membrane bag are made of elastic rubber material. When water is filled into the protective outer membrane bag, the protective inner membrane bag expands inward and the protective outer membrane bag expands outward, so that the connecting port is closed and the oil absorbed in the oil-absorbing cotton tray is squeezed out.

[0011] Furthermore, the end of the pressure relief pipe furthest from the protective outer membrane bag is fixedly connected to the inner wall of the water purification tank, and a drain valve is fixedly connected to the connection between the water purification tank and the pressure relief pipe.

[0012] Compared with the prior art, the advantages of this invention are: (1) The present invention delivers natural gas into the drying tank, so that the natural gas floats up in the form of bubbles and enters the water tank through the gas surge pipe. The pure water in the water tank enters the drying tank through the gas surge pipe. The flow of pure water effectively prevents the water in the drying tank from entering the water tank with the bubbles, thereby effectively preventing oil from entering the water tank and achieving the separation of natural gas and oil.

[0013] (2) The extension tube of the present invention is designed with a trumpet shape at the bottom to concentrate the bubbles. The drive motor drives the rotating shaft to drive the water pump to make the pure water in the water tank rise with the bubbles in the extension tube. Natural gas is released from the top of the extension tube, and the pure water that rises with the bubbles overflows from the top of the extension tube. Since the top of the extension tube is higher than the liquid surface of the pure water in the water tank, it effectively prevents the pure water from staying in the natural gas release area, thereby effectively preventing the oil remaining on the pure water surface from contacting the natural gas, and further improving the oil removal effect of the natural gas. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a side cross-sectional view of the present invention; Figure 3 This is a cross-sectional view of the air-emerging pipe and the water purification tank of the present invention; Figure 4 This is a bottom perspective view of the air collection cover of the present invention. Figure 5 This is a cross-sectional perspective view of the extension tube of the present invention; Figure 6 This is a top sectional three-dimensional structural diagram of the water purification tank of the present invention; Figure 7 This is a cross-sectional perspective view of the oil-absorbing cotton disc of the present invention; Figure 8 This is a top cross-sectional perspective view of the oil-absorbing cotton disc of the present invention. Figure 9 This is a three-dimensional structural diagram of the mesh pipe fitting and return oil pipe of the present invention; Figure 10 This is a demonstration diagram illustrating the changes in water filling of the outer membrane bag of this invention.

[0015] Explanation of the labels in the diagram: 1. Drying tank, 101. Air inlet pipe, 102. Air surge pipe, 103. Clean water tank, 104. Clean water inlet pipe, 105. Air collection cover, 106. Air outlet pipe, 107. Air return pipe, 108. Oil drain pipe, 109. Drain pipe, 2. Extension pipe, 201. Drive motor, 202. Rotary shaft, 203. Water priming impeller, 3. Oil absorbent cotton disc, 301. Protective inner membrane bag, 302. Protective outer membrane bag, 303. Connecting port, 304. Mesh fittings, 305. Oil return pipe, 306. Oil drain hole, 307. Water filling pipe, 308. Pressure relief pipe, 309. Water filling valve, 310. Drain valve. Detailed Implementation

[0016] The technical solutions will now be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention.

[0017] First implementation method: Please see Figures 1 to 3 A pre-positioned natural gas oil removal and drying device includes a drying tank 1. An air inlet pipe 101 is fixedly connected to one bottom end of the drying tank 1. An air surge pipe 102 is fixedly connected to the top of the end of the drying tank 1 near the air inlet pipe 101. A clean water tank 103 is fixedly connected to the top of the air surge pipe 102. A clean water inlet pipe 104 is fixedly connected to the bottom of the clean water tank 103. The height of the clean water tank 103 is the same as the height of the top of the other end of the drying tank 1. A gas collection cover 105 is fixedly connected to the top of the clean water tank 103. An air outlet pipe 106 is fixedly connected to the top of the gas collection cover 105. A return gas pipe 107 and an oil drain pipe 108 are fixedly connected from top to bottom to the top of the other end of the drying tank 1. The air outlet of the return gas pipe 107 is fixedly connected to the air inlet pipe 101. A drain pipe 109 is fixedly connected to the bottom of the other end of the drying tank 1. Natural gas is delivered into the drying tank 1 through the inlet pipe 101, causing it to rise as bubbles and enter the purified water tank 103 through the gas surge pipe 102. Purified water enters the purified water tank 103 through the purified water inlet pipe 104, allowing the purified water in the purified water tank 103 to enter the drying tank 1 through the gas surge pipe 102. The bubbles formed by the natural gas can enter the purified water tank 103 against the flow of the purified water. However, due to the impact of the purified water flow, the water in the drying tank 1 cannot follow the bubbles into the purified water tank 103, thus effectively preventing the oil in the water in the drying tank 1 from entering the purified water tank 103 as well, effectively improving the separation effect of natural gas and oil.

[0018] Please see Figures 3 to 5 An extension pipe 2 is fixedly connected to the middle of the air collection cover 105. The extension pipe 2 is vertically corresponding to the air surge pipe 102, and the bottom end of the extension pipe 2 is flared. The inner end of the clean water inlet pipe 104 passes through the bottom of the flared end of the extension pipe 2, and the inner end of the clean water inlet pipe 104 is vertically facing the air surge pipe 102. A drive motor 201 is fixedly connected to the top of the air collection cover 105. A rotating shaft 202 is fixedly connected to the output end of the drive motor 201. The bottom end of the rotating shaft 202 extends to the flared part of the extension pipe 2, and a water-guiding paddle wheel 203 is fixedly connected to the outside of the bottom end of the rotating shaft 202. After the natural gas, which rises in the form of bubbles, enters the water purification tank 103, the extension pipe 2, with its flared bottom, concentrates the bubbles. The drive motor 201 drives the rotating shaft 202, causing the water-guiding impeller 203 to carry the purified water in the water purification tank 103 to rise along with the bubbles in the extension pipe 2. This causes the natural gas to be released from the top of the extension pipe 2, and the purified water that rises with the bubbles overflows from the top of the extension pipe 2. Since the top of the extension pipe 2 is higher than the surface of the purified water in the water purification tank 103, it effectively prevents the purified water from staying in the natural gas release area, thereby effectively preventing the oil remaining on the surface of the purified water from coming into contact with the natural gas, further improving the oil removal effect of the natural gas.

[0019] Second implementation method: Compared to the first embodiment, the main addition is an oil-absorbing cotton disc 3, the specific addition structure is as follows, and the rest of the structure is the same as the first embodiment.

[0020] Please see Figure 6 and Figure 7Inside the water tank 103, there is an oil-absorbing cotton disc 3 floating inside. An extension tube 2 is sleeved with the oil-absorbing cotton disc 3. The oil-absorbing cotton disc 3 is covered with a protective inner membrane bag 301. The protective inner membrane bag 301 is covered with a protective outer membrane bag 302. A connecting port 303 is fixedly connected between the protective inner membrane bag 301 and the protective outer membrane bag 302. The connecting port 303 connects the inner membrane surface of the protective inner membrane bag 301 and the outer membrane surface of the protective outer membrane bag 302. A mesh tube 304 is fixedly embedded in the middle of the oil-absorbing cotton disc 3. A return oil pipe 305 is fixedly connected to the converging end of the mesh tube 304. The return oil pipe 305 passes through the protective inner membrane bag 301 and the protective outer membrane bag 302 in sequence. The return oil pipe 305 is made of plastic hose. An oil drain hole 306 is opened on the outside of the water tank 103. The return oil pipe 305 is fixedly connected to the oil drain hole 306. The oil-absorbing cotton disc 3 floating inside the water purification tank 103 absorbs the oil floating on the liquid surface. When the oil removal device needs to be cleaned after a certain period of operation, the oil-absorbing cotton disc 3 is squeezed and the squeezed oil is collected through the mesh pipe 304 and discharged from the water purification tank 103 through the oil return pipe 305 and the oil discharge hole 306.

[0021] Please see Figures 7 to 10 The outer protective membrane bag 302 is fixedly connected to a water filling pipe 307 and a pressure relief pipe 308. Both the water filling pipe 307 and the pressure relief pipe 308 are made of plastic hoses. The end of the water filling pipe 307 away from the outer protective membrane bag 302 is fixedly connected to the purified water inlet pipe 104, and a water filling valve 309 is fixedly connected to the connection between the water filling pipe 307 and the purified water inlet pipe 104. The inner protective membrane bag 301 and the outer protective membrane bag 302 are both made of elastic rubber material. When water is filled into the outer protective membrane bag 302, the inner protective membrane bag 301 expands inward and the outer protective membrane bag 302 expands outward, so that the connecting port 303 is closed and the oil absorbed in the oil-absorbing cotton disc 3 is squeezed out. The end of the pressure relief pipe 308 away from the outer protective membrane bag 302 is fixedly connected to the inner wall of the purified water tank 103. A drain valve 310 is fixedly connected to the connection between the purified water tank 103 and the pressure relief pipe 308. When the oil absorbed by the oil-absorbing cotton disc 3 needs to be cleaned, pure water is introduced into the protective outer membrane bag 302 through the water filling pipe 307 connected to the clean water inlet pipe 104. This causes the protective outer membrane bag 302 to expand with water, and the protective inner membrane bag 301 to expand inward under the pressure of the water, applying pressure to the oil-absorbing cotton disc 3. At the same time, the connecting port 303 is squeezed and sealed, thus preventing the oil squeezed out of the oil-absorbing cotton disc 3 from leaking out of the connecting port 303. After the oil-absorbing cotton disc 3 is cleaned, the water in the protective outer membrane bag 302 is discharged by opening the pressure relief pipe 308. The discharged pure water is directly discharged into the clean water tank 103. Through the elasticity of the protective inner membrane bag 301 and the protective outer membrane bag 302, as well as the elastic recovery ability of the oil-absorbing cotton disc 3 itself, the connecting port 303 is restored.

[0022] The above description is merely a preferred embodiment of the present invention; it encompasses all the protection scope of the present invention. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solutions and improved concepts of the present invention, should be covered within the protection scope of the present invention.

Claims

1. A pre-type natural gas oil removal and drying device, comprising a drying tank (1), characterized in that: An air inlet pipe (101) is fixedly connected to one end of the bottom of the drying tank (1). An air surge pipe (102) is fixedly connected to the top of the end of the drying tank (1) near the air inlet pipe (101). A purified water tank (103) is fixedly connected to the top of the air surge pipe (102). A purified water inlet pipe (104) is fixedly connected to the bottom of the purified water tank (103). The height of the purified water tank (103) is the same as the height of the top of the other end of the drying tank (1). An air collection cover (105) is fixedly connected to the top of the purified water tank (103). An air outlet pipe (106) is fixedly connected to the top of the air collection cover (105). An extension pipe (2) is fixedly connected to the middle of the gas collection cover (105). The extension pipe (2) is vertically corresponding to the gas surge pipe (102), and the bottom end of the extension pipe (2) is flared. The inner end of the purified water inlet pipe (104) passes through the bottom of the flared end of the extension pipe (2), and the inner end of the purified water inlet pipe (104) is vertically facing the gas surge pipe (102). A drive motor (201) is fixedly connected to the top of the gas collection cover (105). A rotating shaft (202) is fixedly connected to the output end of the drive motor (201). The bottom end of the rotating shaft (202) extends to the flared part of the extension pipe (2), and a water-drawing paddle wheel (203) is fixedly connected to the outside of the bottom end of the rotating shaft (202).

2. The pre-processed natural gas oil removal and drying device according to claim 1, characterized in that: The top of the other end of the drying tank (1) is fixedly connected to a return air pipe (107) and an oil drain pipe (108) from top to bottom. The outlet end of the return air pipe (107) is fixedly connected to the inlet air pipe (101). The bottom of the other end of the drying tank (1) is fixedly connected to a drain pipe (109).

3. The pre-processed natural gas oil removal and drying device according to claim 1, characterized in that: The inside of the water purification tank (103) is a floating oil-absorbing cotton disc (3), and the extension tube (2) is connected to the oil-absorbing cotton disc (3).

4. A pre-processed natural gas oil removal and drying device according to claim 3, characterized in that: The oil-absorbing cotton tray (3) is covered with a protective inner film bag (301), and the protective inner film bag (301) is covered with a protective outer film bag (302). A connecting port (303) is fixedly connected between the protective inner film bag (301) and the protective outer film bag (302). The connecting port (303) connects the inner film surface of the protective inner film bag (301) and the outer film surface of the protective outer film bag (302).

5. A pre-processed natural gas oil removal and drying device according to claim 4, characterized in that: The oil-absorbing cotton disc (3) is fixedly inlaid with a mesh tube (304) in the middle. The converging end of the mesh tube (304) is fixedly connected to an oil return pipe (305). The oil return pipe (305) passes through the inner protective membrane bag (301) and the outer protective membrane bag (302) in sequence. The oil return pipe (305) is made of plastic hose. The outside of the water tank (103) is provided with an oil drain hole (306). The oil return pipe (305) is fixedly connected to the oil drain hole (306).

6. A pre-processed natural gas oil removal and drying device according to claim 4, characterized in that: The outer protective membrane bag (302) is fixedly connected to a water filling pipe (307) and a pressure relief pipe (308). Both the water filling pipe (307) and the pressure relief pipe (308) are made of plastic hoses. The end of the water filling pipe (307) away from the outer protective membrane bag (302) is fixedly connected to the clean water inlet pipe (104), and a water filling valve (309) is fixedly connected to the connection between the water filling pipe (307) and the clean water inlet pipe (104). Both the inner protective membrane bag (301) and the outer protective membrane bag (302) are made of elastic rubber material. When water is filled into the outer protective membrane bag (302), the inner protective membrane bag (301) expands inward and the outer protective membrane bag (302) expands outward, so that the connecting port (303) is closed and the oil absorbed in the oil-absorbing cotton disc (3) is squeezed out.

7. A pre-processed natural gas oil removal and drying device according to claim 6, characterized in that: The end of the pressure relief pipe (308) away from the protective outer membrane bag (302) is fixedly connected to the inner wall of the water purification tank (103), and a drain valve (310) is fixedly connected to the connection between the water purification tank (103) and the pressure relief pipe (308).

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