Device for liquid separation and backflow of natural gas source

Abstract

The utility model discloses a device for liquid separation backflow of a natural gas source. The device comprises a gas inlet main pipe, a gas outlet main pipe, a regeneration gas inlet main pipe, a regeneration gas outlet main pipe and a plurality of adsorption tanks which are arranged in parallel, the lower part of the adsorption tank is connected with an air inlet branch pipe and a regeneration exhaust branch pipe, and the upper part of the adsorption tank is connected with an air outlet branch pipe and a regeneration air inlet branch pipe; a screen frame is clamped in the middle of the interior of the adsorption tank and is filled with an adsorbent; each air inlet branch pipe is connected with the air inlet main pipe, each air outlet branch pipe is connected with the air outlet main pipe, each regeneration air inlet branch pipe is connected with the regeneration air inlet main pipe, and each regeneration exhaust branch pipe is connected with the regeneration exhaust main pipe; valves are arranged on the air inlet main pipe, the air outlet main pipe, the regeneration air inlet main pipe, the regeneration air outlet main pipe, the air inlet branch pipes, the air outlet branch pipes, the regeneration air inlet branch pipes and the regeneration air outlet branch pipes; and a heater is arranged on the regeneration gas inlet header pipe. The natural gas separator can effectively solve the problem that the separator is poor in shunting effect when the liquid content of natural gas is high, and is high in adsorption efficiency.

Description

Technical Field

[0001] The utility model relates to the field of natural gas processing, and more specifically, to a device for liquid separation and backflow of natural gas source. Background Art

[0002] Wellhead natural gas extracted from underground generally contains free water, light hydrocarbons and other liquid droplets. When the wellhead natural gas is recovered, the gas phase and liquid phase of the natural gas will be separated through a separator. However, when the liquid content of the natural gas in the gas well is high, the separator will not be effective in diverting gas and liquid. The acidic substances dissolved in the liquid droplets in the natural gas will cause certain corrosion to the pipeline and production equipment, affecting production efficiency and bringing safety risks. Utility Model Content

[0003] An object of the present invention is to solve at least the above problems and to provide at least the advantages which will be described below.

[0004] In order to achieve these purposes and other advantages according to the utility model, a device for natural gas source liquid separation and backflow is provided, comprising an intake main pipe, an outlet main pipe, a regeneration intake main pipe, a regeneration exhaust main pipe and a plurality of adsorption tanks arranged in parallel; the lower part of the adsorption tank is connected with an intake branch pipe and a regeneration exhaust branch pipe, and the upper part is connected with an outlet branch pipe and a regeneration intake branch pipe; a mesh frame is provided in the middle of the internal part of the adsorption tank, and the mesh frame is filled with an adsorbent; each of the intake branch pipes is respectively connected to the intake main pipe, each of the outlet branch pipes is respectively connected to the outlet main pipe, each of the regeneration intake branch pipes is respectively connected to the regeneration intake main pipe, and each of the regeneration exhaust branch pipes is respectively connected to the regeneration exhaust main pipe; valves are arranged on the intake main pipe, the outlet main pipe, the regeneration intake main pipe, the regeneration exhaust main pipe, each of the intake branch pipes, each of the outlet branch pipes, each of the regeneration intake branch pipes and each of the regeneration exhaust branch pipes; a heater is arranged on the regeneration intake main pipe.

[0005] Preferably, the number of adsorption tanks is three.

[0006] Preferably, the adsorbent is a molecular sieve.

[0007] Preferably, flow equalizing plates are provided at both upper and lower ends of the screen frame.

[0008] Preferably, the shell of the adsorption tank comprises an inner shell, an outer shell and a polyurethane insulation layer filled between the inner shell and the outer shell.

[0009] Preferably, a filter unit is provided on the gas outlet main pipe, and the filter unit is a cyclone.

[0010] The utility model at least has the following beneficial effects:

[0011] The device for natural gas source liquid separation and backflow provided by the utility model can effectively solve the problem of poor gas and liquid separation effect of the separator when the natural gas liquid content in the gas well is high by arranging multiple adsorption tanks in front of the separator inlet pipe to pre-adsorb water and liquid droplets in the natural gas, thereby reducing the corrosion risk of pipelines and production equipment. The saturated adsorption tank is dried and regenerated by heated gas, so that multiple adsorption tanks can be used alternately to ensure adsorption efficiency.

[0012] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of the device for liquid separation and backflow of natural gas source according to the utility model;

[0014] Figure 2 This is a schematic diagram of the internal structure of the adsorption tank of the utility model;

[0015] Figure 3 It is a structural schematic diagram of the cyclone of the utility model; DETAILED DESCRIPTION

[0016] The present invention will be further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0017] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials are commercially available unless otherwise specified; in the description of the present invention, the terms "lateral", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, which 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 direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0018] like Figure 1As shown, the utility model provides a device for liquid separation and backflow of natural gas source, comprising an intake main pipe 1, an outlet main pipe 12, a regeneration intake main pipe 13, a regeneration exhaust main pipe 3 and a plurality of adsorption tanks 7 arranged in parallel; the lower part of the adsorption tank 7 is connected with an intake branch pipe 5 and a regeneration exhaust branch pipe 18, and the upper part is connected with an outlet branch pipe 16 and a regeneration intake branch pipe 8; a mesh frame 21 is provided in the middle of the interior of the adsorption tank 7, and the mesh frame is filled with an adsorbent; each of the intake branch pipes 5 is respectively connected to the intake main pipe 1, each of the outlet branch pipes 16 is respectively connected to the outlet main pipe 12, each of the regeneration intake branch pipes 8 is respectively connected to the regeneration intake main pipe 13, and each of the regeneration exhaust branch pipes 18 is respectively connected to the regeneration exhaust main pipe 3. Valves are provided on the intake manifold 1, the outlet manifold 12, the regeneration intake manifold 13, the regeneration exhaust manifold 3, each intake branch pipe 5, each outlet branch pipe 16, each regeneration intake branch pipe 8 and each regeneration exhaust branch pipe 18; a heater 14 is provided on the regeneration intake manifold 13.

[0019] In this technical solution, the outlet main pipe 12 is connected to the air inlet pipe of the separator. The valves are respectively the air inlet main valve 2 on the air inlet main pipe 1, the air outlet main valve 11 on the air outlet main pipe 12, the air inlet valve 6 on the air inlet branch pipe 5, the air outlet valve 17 on the air outlet branch pipe 16, the regeneration air inlet main valve 15 on the regeneration air inlet main pipe 13, the exhaust main valve 4 on the regeneration exhaust main pipe 3, the regeneration air inlet valve 6 on the regeneration air inlet branch pipe 8, and the exhaust valve 19 on the regeneration exhaust branch pipe 18. The plurality of adsorption tanks 7 perform adsorption and regeneration treatments alternately. The specific process is as follows: the main intake valve 2 and the main outlet valve are opened, the intake valve 6 and the outlet valve 17 on the adsorption tank 7 for intake adsorption treatment are opened, and the regeneration intake valve 6 and the exhaust valve 19 are closed; the remaining adsorption tanks 7 are regenerated, their intake valves 6 and the outlet valves 17 are closed, the regeneration intake valves 6 and the exhaust valves 19 are opened, and the regeneration intake main valve 15 and the exhaust main valve 4 are opened; the natural gas enters the adsorption tank 7 for treatment through the intake main pipe 1, and after being adsorbed by the adsorbent, enters the separator through the corresponding outlet branch pipe 16 and the outlet main pipe 12. During the above process, the natural gas will not enter the adsorption tank 7 for regeneration treatment. After passing through the regeneration intake manifold 13 and being heated by the heater 14, the dry gas enters the adsorption tank 7 for regeneration treatment, dries the adsorbent, takes away the moisture adsorbed in the adsorbent, and then outputs to the outside through the corresponding regeneration exhaust branch pipe 18 and the regeneration exhaust manifold 3. In the above process, the dry gas will not enter the adsorption tank 7 for adsorption treatment; preferably, a temperature sensor is provided in the regeneration intake manifold 13 downstream of the heater 14 to monitor the temperature of the gas heated by the heater. The device for liquid separation and backflow of natural gas source pre-adsorbs water and droplets in natural gas by arranging multiple adsorption tanks 7 in front of the separator intake pipe, and multiple adsorption tanks 7 can be used alternately to ensure adsorption efficiency.

[0020] In another technical solution, the adsorption tanks 7 are provided in three numbers. One of the three adsorption tanks is a standby adsorption tank; the other two adsorption tanks 7 are used for adsorption and regeneration respectively. The adsorption tanks 7 are not limited to being provided in three numbers, and a plurality of adsorption tanks 7 can be provided in parallel as required.

[0021] In another technical solution, the adsorbent is a molecular sieve, which has high adsorption capacity, strong selectivity, high temperature resistance, and can be regenerated by heating.

[0022] In another technical solution, Figure 2As shown, the upper and lower ends of the mesh frame 21 are both provided with flow equalizing plates 20. The flow equalizing plates 20 are evenly distributed with a plurality of through holes, which can evenly introduce the natural gas or dry gas entering the adsorption tank 7 into the mesh frame 21, thereby improving the efficiency and effect of adsorption and drying. The mesh frame 21 and the flow equalizing plates 20 are matched with the internal structure shape of the adsorption tank 7, so that the adsorbent completely covers the cross section of the adsorption tank 7, further ensuring the adsorption effect.

[0023] In another technical solution, the shell of the adsorption tank 7 includes an inner shell, an outer shell, and a polyurethane insulation layer filled between the inner shell and the outer shell. The polyurethane insulation layer enables the shell of the adsorption tank 7 to have a heat preservation effect, and when the regeneration process is performed, the temperature inside the adsorption tank 7 is maintained, which can further save energy.

[0024] In another technical solution, a filter unit 10 is provided on the gas outlet main pipe 12, and the filter unit 10 is a cyclone. Figure 3 As shown, preferably, the cyclone is arranged downstream of the main gas outlet valve 11. The cyclone includes a shell 100 having a conical cyclone inner cavity, the upper part of the shell 100 is provided with an air inlet port 110 connected to the conical cyclone inner cavity, and the top thereof is provided with an exhaust port 120 connected to the conical cyclone inner cavity, and the bottom of the shell 100 is detachably connected with an impurity groove 130, and the impurity groove 130 is connected to the conical cyclone inner cavity. When the adsorbed natural gas carries impurities such as small particles of adsorbent, it can be further filtered through the cyclone. After the natural gas enters the conical cyclone inner cavity through the air inlet port 110 and is connected, it flows downward along its inner wall in a spiral, and under the action of centrifugal force, the impurity particles are thrown into the impurity groove 130 below, and the center of the filtered gas inner cavity enters the exhaust port 120 upward. The impurity groove 130 can be cleaned regularly.

[0025] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation modes. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A device for liquid separation and backflow of natural gas source, characterized in that: It includes an intake main pipe, an outlet main pipe, a regeneration intake main pipe, a regeneration exhaust main pipe and a plurality of adsorption tanks arranged in parallel; the lower part of the adsorption tank is connected with an intake branch pipe and a regeneration exhaust branch pipe, and the upper part is connected with an outlet branch pipe and a regeneration intake branch pipe; a mesh frame is provided in the middle of the inner part of the adsorption tank, and the mesh frame is filled with adsorbent; each of the intake branch pipes is respectively connected to the intake main pipe, each of the outlet branch pipes is respectively connected to the outlet main pipe, each of the regeneration intake branch pipes is respectively connected to the regeneration intake main pipe, and each of the regeneration exhaust branch pipes is respectively connected to the regeneration exhaust main pipe; valves are provided on the intake main pipe, the outlet main pipe, the regeneration intake main pipe, the regeneration exhaust main pipe, each of the intake branch pipes, each of the outlet branch pipes, each of the regeneration intake branch pipes and each of the regeneration exhaust branch pipes; a heater is provided on the regeneration intake main pipe.

2. The device for natural gas source liquid separation and backflow according to claim 1, characterized in that: The number of adsorption tanks is three.

3. The device for liquid separation and backflow of natural gas source according to claim 1, characterized in that: The adsorbent is a molecular sieve.

4. The device for natural gas source liquid separation and backflow according to claim 1, characterized in that: Flow equalizing plates are arranged at both upper and lower ends of the mesh frame.

5. The device for liquid separation and backflow of natural gas source according to claim 1, characterized in that: The shell of the adsorption tank comprises an inner shell, an outer shell and a polyurethane insulation layer filled between the inner shell and the outer shell.

6. The device for liquid separation and reverse flow of natural gas source according to claim 1, characterized in that: The gas outlet main pipe is provided with a filter unit, and the filter unit is a cyclone.

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