Movable methanol filling skid block

Abstract

The utility model discloses a movable methanol filling skid block, relates to the technical field of natural gas extraction, and solves the problems that the position of a methanol filling skid in the prior art is fixed, and the mounting position cannot be adjusted according to actual conditions. The device comprises a methanol storage tank, the methanol storage tank is installed on a bottom skid, a gas collecting pipeline is installed on the methanol storage tank, a metering pump set is connected to the gas collecting pipeline, an emptying pipeline is installed on the metering pump set, and the emptying pipeline is connected with a safety valve emptying opening in the methanol storage tank. The methanol storage tank can move along with the bottom skid and is convenient to transport, the position of the device can be adjusted according to actual needs, the purpose that the same device can be used in multiple ways is achieved, methanol filling is facilitated, the filling efficiency is high, the metering pump set is provided with the emptying pipeline, the emptying pipeline is communicated to the methanol storage tank, and the safety in the methanol filling process is further guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of natural gas mining, in particular to a methanol filling device. Background Art

[0002] The alcohol injection skid prevents the formation of natural gas hydrates by injecting solvents such as methanol into the wellhead and gas production pipeline. Natural gas hydrates are crystalline substances formed by the combination of gas molecules and water molecules in natural gas under low temperature and high pressure conditions. They are easily formed in the wellhead and gas production pipeline, causing pipeline blockage and affecting production. The alcohol injection skid destroys the formation conditions of hydrates by injecting solvents, thereby preventing their formation. The working principle of the alcohol injection skid is to prevent the formation of natural gas hydrates by injecting solvents (usually methanol) into the wellhead and gas production pipeline. Specific operating methods include drip injection, alcohol injection by electric metering pump, and alcohol injection by pneumatic alcohol injection pump. These methods require the installation of an alcohol injection device or a heating furnace at the wellhead, but the cost is relatively high.

[0003] In the prior art, a Chinese invention patent with publication number CN 108894762 A, published on November 27, 2018, discloses an alcohol injection device for a gas well site and its use method. The device comprises at least an alcohol storage tank, a pressure detector, an alcohol injection pump, and a gas production pipeline. The inlet of the alcohol storage tank is connected to a methanol unloading port, and the outlet of the alcohol storage tank is sequentially connected to the pressure detector, the alcohol injection pump, and the gas production pipeline via a methanol pipeline. Multiple sets of filters and flow meters are arranged in parallel between the pressure detector and the inlet of the alcohol injection pump. The outlet of the alcohol injection pump is connected to multiple gas production pipelines, which are connected to multiple gas production wells and arranged in parallel. A pressure monitor is installed on each methanol pipeline between the gas production pipeline and the outlet of the alcohol injection pump. Although this patent allows a single device to simultaneously inject alcohol into multiple pipelines, reducing project construction costs, and allows remote adjustment of the alcohol injection amount and remote pump start and stop, reducing ineffective alcohol injection, its location is fixed and cannot be adjusted according to actual conditions. Utility Model Content

[0004] In view of the deficiencies in the above-mentioned background technology, the present invention proposes a mobile methanol filling skid, which solves the problem in the prior art that the position of the methanol filling skid is fixed and the installation position cannot be adjusted according to actual conditions.

[0005] The technical solution of the utility model is achieved as follows: a mobile methanol filling skid comprises a methanol storage tank, which is mounted on a bottom skid, a gas collecting pipeline mounted on the methanol storage tank, a metering pump group connected to the gas collecting pipeline, a venting pipeline mounted on the metering pump group, and the venting pipeline connected to the vent port of the safety valve on the methanol storage tank.

[0006] Further preferably, the air inlet end of the filling pipeline is connected to a methanol unloading pump.

[0007] Further preferably, the gas gathering pipeline includes a U-shaped tube, a calibration column is provided on the U-shaped tube, one end of the U-shaped tube is connected to the methanol storage tank, the other end of the U-shaped tube is connected to a vertical pipe, a first flange is connected to the vertical pipe, the vertical pipe is connected to the metering pump group through the first flange, and the calibration column is connected to the U-shaped tube.

[0008] Further preferably, the metering pump group includes a metering pump, the lower portion of the metering pump is connected to a second flange, the second flange is connected to the first flange, and the upper portion of the metering pump is connected to a metering pump outlet.

[0009] Further preferably, an outlet damper is provided between the metering pump and the metering pump outlet.

[0010] Further preferably, the upper part of the metering pump is connected to a four-way pipe, one horizontal outlet of the four-way pipe is connected to the vent line, another horizontal outlet of the four-way pipe is connected to the metering pump outlet, and the upper outlet of the four-way pipe is connected to a high-pressure check valve and a high-pressure stop valve.

[0011] Further preferably, a safety valve is provided on the vent line.

[0012] Further preferably, the bottom skid comprises a bottom frame, a liquid collecting pan is provided at the lower portion of the bottom frame, a vertical frame is connected to the bottom frame, and a platform ladder is connected to the vertical frame.

[0013] Further preferably, the methanol storage tank is connected to a sewage pipeline.

[0014] Further preferably, the sewage discharge line includes an L-shaped tube, one end of the L-shaped tube is connected to the lower part of the methanol storage tank, and the other end of the L-shaped tube is connected to a valve switch.

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

[0016] 1. The methanol storage tank can move with the bottom skid, which is convenient for transportation. The position of the device can be adjusted according to actual needs to achieve the purpose of multiple uses of the same device, which is convenient for methanol filling and has high filling efficiency. A vent line is set on the metering pump group and connected to the methanol storage tank, which further ensures the safety of the methanol filling process.

[0017] 2. The use of a calibration column can clearly and intuitively observe the actual flow rate of methanol, making it easier to control the amount of methanol added.

[0018] 3. The vent line is connected to the side wall of the methanol storage tank. When the outlets of the metering pumps are closed, the methanol coming out of the methanol storage tank is returned to the methanol storage tank to protect the safety of the device.

[0019] 4. A safety valve is provided on the vent line, which is used to control the switch connecting the vent line and the metering pump. The vent line is connected to the side wall of the methanol storage tank. When the outlets of the metering pumps are closed, the methanol coming out of the methanol storage tank is returned to the methanol storage tank to protect the metering pumps and pipelines, thereby protecting the safety of the device.

[0020] 5. The sewage pipeline can be used to discharge impurities in the methanol storage tank and increase the service life of the methanol storage tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 It is a structural diagram of the utility model;

[0023] Figure 2 for Figure 1 Top view of the metering pump inlet

[0024] Figure 3 for Figure 1 Top view of the inlet of the metering pump in direction A;

[0025] Figure 4 for Figure 1 Side view of the middle safety valve vent / methanol filling port A;

[0026] Figure 5 for Figure 1 Side view of the metering pump outlet A.

[0027] In the figure: 1. Methanol storage tank, 2. Distribution box, 3. Metering pump, 4. Skid, 5. Three-piece welded ball valve, 6. Y-type filter, 7. Collection tray, 8. Methanol unloading pump, 9. Platform ladder, 10. High-pressure stop valve, 11. High-pressure check valve, 12. Safety valve, 13. Outlet damper, 14. Calibration column, 15. Sewage pipeline, 16. Metering pump outlet, 17. U-shaped pipe. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments 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.

[0029] like Figures 1 to 5 As shown in Example 1, a mobile methanol filling skid comprises a methanol storage tank 1 mounted on a base skid 4. A gas collection pipeline is installed on the methanol storage tank 1, which is connected to a metering pump assembly. A vent line is installed on the metering pump assembly, and the vent line is connected to the safety valve vent port on the methanol storage tank 1. The methanol storage tank 1 can move with the base skid 4 for easy transportation. The position of the device can be adjusted according to actual needs, achieving multiple uses of the same device, facilitating methanol filling and improving filling efficiency. A vent line is provided on the metering pump assembly and connected to the methanol storage tank 1, further ensuring safety during the methanol filling process.

[0030] In this embodiment, the gas inlet end of the filling pipeline is connected to a methanol unloading pump, which is used to fill the methanol storage tank with methanol. The gas collection pipeline includes a U-shaped tube 17, which is equipped with a calibration column 14. The calibration column 14 allows for intuitive observation of the actual methanol flow rate, facilitating control of the methanol filling amount. One end of the U-shaped tube 17 is connected to the methanol storage tank 1, and the other end of the U-shaped tube 17 is connected to a standpipe. The U-shaped tube 17 and the standpipe are connected via an elbow. The standpipe is connected to a first flange, which is connected to the metering pump assembly via the first flange. The calibration column 14 is connected to the U-shaped tube 17. The U-shaped tube is also provided with a three-piece welded ball valve 5 and a Y-type filter 6 to prevent foreign matter from being added to methanol. The three-piece welded ball valve 5 and the Y-type filter 6 are located between the calibration column 14 and the gas collecting valve. The U-shaped tube 17 with different lengths at both ends is used to facilitate adjustment according to the length of the bottom skid 4, ensuring that all pipelines are located inside the bottom skid 4. It is also convenient for installing structures such as the calibration column 14 and has good flexibility.

[0031] In this embodiment, the metering pump assembly includes a metering pump 3. A second flange is connected to the lower portion of the metering pump 3, which is connected to the first flange. A metering pump outlet 16 is connected to the upper portion of the metering pump 3. An outlet damper 13 is also provided between the metering pump 3 and the metering pump outlet 16. A cross-section pipe is connected to the upper portion of the metering pump 3. One horizontal outlet of the cross-section pipe is connected to a vent line, and the other horizontal outlet of the cross-section pipe is connected to the metering pump outlet 16. The upper outlet of the cross-section pipe is connected to a high-pressure check valve 11 and a high-pressure shut-off valve 10. Methanol can be connected to the wellsite natural gas pipeline through the high-pressure check valve 11 and the high-pressure shut-off valve 10, allowing the device to be connected to the wellsite natural gas pipeline for methanol injection. A safety valve 12 is provided on the vent line to control the opening and closing of the vent line and the metering pump 3. The vent line is connected to the sidewall of the methanol storage tank 1. When the outlets of the metering pump 3 are closed, methanol from the methanol storage tank 1 is returned to the methanol storage tank 1 to protect the metering pump 3 and the pipeline, thereby ensuring the safety of the device.

[0032] like Figure 1 and Figure 2As shown in Example 2, a mobile methanol filling skid is shown. The skid 4 comprises a bottom frame, a liquid collection tray 7 disposed beneath the bottom frame, a vertical frame connected to the bottom frame, and a platform ladder 9 connected to the vertical frame. The bottom frame and the vertical frame form the device's protective structure. The liquid collection tray 7 prevents liquid from directly flowing to the ground during use, and the platform ladder 9 facilitates access for operators to open and close the valve. Also mounted within the protective structure is a distribution box 2 connected to the device, creating an integrated design that enhances the device's ease of use.

[0033] In this embodiment, a drain line 15 is connected to the methanol storage tank 1. This drain line 15 is used to drain impurities from the methanol storage tank 1, thereby extending the service life of the methanol storage tank 1. The drain line 15 comprises an L-shaped tube, one end of which is connected to the lower portion of the methanol storage tank 1, and the other end of which is connected to a valve. The L-shaped tube controls the direction of discharge from the drain line 15, and the valve can be an existing valve to control the opening and closing of the drain line.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A mobile methanol filling skid, characterized by: The invention comprises a methanol storage tank (1), wherein the methanol storage tank (1) is installed on a bottom skid (4), a filling pipeline and a gas collecting pipeline are installed on the methanol storage tank (1), a metering pump group is connected to the gas collecting pipeline, a venting pipeline is installed on the metering pump group, and the venting pipeline is connected to the venting port of the safety valve on the methanol storage tank (1).

2. The mobile methanol filling skid according to claim 1, characterized in that: The air inlet end of the filling pipeline is connected to a methanol unloading pump (8).

3. The mobile methanol filling skid according to claim 1 or 2, characterized in that: The gas collection pipeline comprises a U-shaped tube (17), a calibration column (14) is provided on the U-shaped tube (17), one end of the U-shaped tube (17) is connected to the methanol storage tank (1), the other end of the U-shaped tube (17) is connected to a vertical tube, the vertical tube is connected to a metering pump group, and the calibration column (14) is connected to the U-shaped tube (17).

4. The mobile methanol filling skid according to claim 3, characterized in that: The metering pump assembly comprises a metering pump (3), the lower portion of the metering pump (3) is connected to a second flange, the second flange is connected to the first flange, and the upper portion of the metering pump (3) is connected to a metering pump outlet (16).

5. The mobile methanol filling skid according to claim 4, characterized in that: An outlet damper (13) is further provided between the metering pump (3) and the metering pump outlet (16).

6. The mobile methanol filling skid according to claim 5, characterized in that: The upper portion of the metering pump (3) is connected to a four-way pipe, one horizontal outlet of the four-way pipe is connected to a vent line, the other horizontal outlet of the four-way pipe is connected to the metering pump outlet (16), and the upper outlet of the four-way pipe is connected to a high-pressure check valve (11) and a high-pressure stop valve (10).

7. The mobile methanol filling skid according to claim 5 or 6, characterized in that: A safety valve (12) is provided on the vent line.

8. The mobile methanol filling skid according to claim 7, characterized in that: The bottom skid (4) comprises a bottom frame, a liquid collecting tray (7) is provided at the lower portion of the bottom frame, a vertical frame is connected to the bottom frame, and a platform ladder (9) is connected to the vertical frame.

9. The mobile methanol filling skid according to claim 5, 6 or 8, characterized in that: The methanol storage tank (1) is connected to a sewage discharge pipeline (15).

10. The mobile methanol filling skid according to claim 9, characterized in that: The sewage discharge pipeline (15) comprises an L-shaped pipe, one end of the L-shaped pipe is connected to the lower part of the methanol storage tank (1), and the other end of the L-shaped pipe is connected to a valve switch.

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