A module for natural gas pigging and filter separation

Abstract

The application discloses a module for natural gas pigging and filtering separation. The module comprises a natural gas pigging skid and a natural gas filtering separation skid. The natural gas pigging skid comprises a ball cylinder, a natural gas receiving and sending ball pipe line, a natural gas inlet pipe line, a venting system, a blowdown system, a balancing system, a water injection system, a matching electric instrument terminal box and a skid base, and has complete natural gas pigging operation functions; the natural gas filtering separation skid comprises a filtering separator, a filter inlet and outlet related pipe line, a venting system, a blowdown system, a water injection system, a matching electric instrument terminal box and a skid base, and has complete natural gas filtering separation operation functions. The module construction technology is used to highly integrate equipment, pipelines, structures, electricity, instruments and the like with natural gas pigging and natural gas filtering separation functions into one module, so that the functions of natural gas pigging and natural gas filtering separation are realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of gas storage natural gas gathering and treatment technology, and particularly relates to a module for natural gas pigging and filtering separation. BACKGROUND

[0002] As city gas, the consumption of natural gas varies greatly with the season. As a gas storage and peak shaving setting, the gas storage is used less in summer, and the pipeline gas is abundant. At this time, the abundant pipeline gas is injected into the underground storage. In winter, the gas stored in the well is extracted and supplemented to the pipeline. The gas injection system of the gas storage pressurizes the natural gas (through the compressor) and injects it into the ground to increase the formation pressure and realize well drilling and gas storage.

[0003] The gas storage needs a filter separator and a pigging device to ensure the smoothness of the pipeline and the cleanliness of the natural gas. The natural gas pigging device is generally arranged at both ends of the natural gas pipeline of the gas storage. Before the natural gas pipeline is put into production, pigging and wire sweeping operation is performed to remove impurities generated due to construction, pressure test, etc. After the natural gas pipeline is put into production, pigging operation is periodically performed according to the medium condition to remove accumulated sewage, ferrous sulfide and other contaminants inside the pipeline. The filter separator can remove dust and impurities in the natural gas through the filter element to ensure the cleanliness of the natural gas. The filtered natural gas is compressed to the injection pressure by the compressor. Therefore, the filter separator and the pigging device are very important components of the gas storage.

[0004] The gas storage is experiencing the third construction boom in China, and the project market has broad prospects. Since 1999, the construction mode of on-site construction has been adopted for the construction of gas storage in China. This mode has a long construction period, high construction cost and great impact on the surrounding environment. For the natural gas pigging device and the natural gas filter separator, how to provide a construction mode with a short construction period, low construction cost and less impact on the surrounding environment is a problem to be solved at present. SUMMARY

[0005] In view of the above problems in the prior art, the present application provides a module for natural gas pigging and filtering separation.

[0006] The module comprises a natural gas pigging skid and a natural gas filtering and separating skid. The skid seat of the natural gas pigging skid is connected with the skid seat of the natural gas filtering and separating skid. The natural gas inlet of the natural gas pigging skid is connected in communication with the natural gas pipeline network. The natural gas outlet of the natural gas pigging skid is connected in communication with the natural gas inlet of the natural gas filtering and separating skid. The natural gas outlet of the natural gas filtering and separating skid is connected in communication with the natural gas pipeline network.

[0007] As a further improvement of the present invention, the natural gas pigging skid is located in the lower layer of the module, and the natural gas filtration and separation skid is located in the upper layer of the module. The skid base of the natural gas pigging skid and the skid base of the natural gas filtration and separation skid are connected by bolts.

[0008] As a further improvement of the present invention, the vertical connection node between the natural gas pigging skid and the natural gas filtration and separation skid adopts a high-strength bolt equal-strength connection, which is a steel connection node design.

[0009] As a further improvement of the present invention, the natural gas pigging skid includes: an instrument junction box, an electrical junction box, a skid base, a natural gas pig launcher / receiver, a main pipeline, a bypass pipeline, and a valve assembly installed on the pipeline.

[0010] As a further improvement of the present invention, the first end of the main pipeline is connected to the natural gas pipeline network, the second end of the main pipeline is connected to the natural gas launcher / receiver tube, the middle part of the main pipeline is connected to the bypass pipeline, and the bypass pipeline is connected to the natural gas filter / separation skid.

[0011] As a further improvement of the present invention, the natural gas transceiver pylon includes: a reducer, a quick-opening blind flange, a pylon, a pylon water injection valve, a pylon balancing pipeline valve, a pylon drain valve assembly, and a vent valve assembly.

[0012] As a further improvement of the present invention, the main pipeline includes: a fully welded electric ball valve and a fully welded pneumatic-hydraulic ball valve.

[0013] As a further improvement of the present invention, the bypass pipeline includes: a ball cylinder bypass electric ball valve, a ball cylinder bypass manual ball valve, a ball cylinder bypass electric plug valve, an inlet bypass valve group, an inlet vent valve group, and an interface with the upper skid block.

[0014] As a further improvement of the present invention, the natural gas filtration and separation skid includes: an instrument junction box, an electrical junction box, a skid base, at least one filtration and separation device, a pipeline, and a valve assembly disposed on the pipeline.

[0015] As a further improvement of the present invention, the natural gas inlet of the filtration and separation device is connected to the natural gas outlet of the natural gas pigging skid, and the natural gas outlet of the filtration and separation device is connected to the natural gas pipeline network.

[0016] As a further improvement of the present invention, the filtration separation devices are connected to each other through pipelines at their respective filter separator inlets.

[0017] As a further improvement of the present invention, the filtration and separation device includes: a filter element, a filter separator, a filter separator inlet pipe, a filter separator outlet pipe, a filter separator vent pipe, a filter separator drain pipe, a filter separator water injection pipe, a filter separator inlet and outlet differential pressure system, and valve assemblies installed on the pipes.

[0018] As a further improvement of the present invention, the filter element is installed in the filter separator; the filter separator inlet pipe and the filter separator outlet pipe are connected through the filter separator; one end of the filter separator vent pipe is connected to the filter separator, and the other end is connected to the natural gas pipeline vent system; one end of the filter separator drain pipe is connected to the filter separator, and the other end is connected to the natural gas pipeline main drain pipe; one end of the filter separator water injection pipe is connected to the filter separator, and the other end is connected to the atmosphere; the filter separator inlet and outlet differential pressure system is connected to the filter separator inlet pipe and the filter separator outlet pipe, respectively.

[0019] As a further improvement of the present invention, the filter separator inlet pipeline includes an electric ball valve for the filter separator inlet and a bypass valve for the filter separator inlet; the filter separator outlet pipeline includes a manual ball valve for the filter separator outlet; the filter separator drain pipeline includes a filter separator drain valve assembly; and the filter separator water injection pipeline includes a filter separator water injection valve.

[0020] As a further improvement of the present invention, the natural gas passes through a module to remove dust and impurities, resulting in a droplet diameter of 0.5-8 μm and a separation efficiency of >99.5%, and a dust diameter of 0.5-1 μm and a separation efficiency of >99.5%, thus ensuring the cleanliness of the gas entering the compressor.

[0021] As a further improvement of the present invention, the dimensions of each layer of skid block in the module are 15.4m × 3.4m × 3.8m (length × width × height), which can meet the requirements of road transportation.

[0022] As a further improvement of the present invention, each skid in the module is equipped with an independent electrical and instrumentation junction box, and the external interface is a cable connector.

[0023] As a further improvement of the present invention, 800mm is left above the upper beam of the steel structure of the natural gas pigging skid in the module for splicing and hoisting between modules; about 500mm is left below the lower beam of the steel structure of the natural gas filtration and separation skid in the module for splicing between modules.

[0024] As a further improvement of the present invention, the upper part of the natural gas pigging skid is reserved to have an interface with the natural gas filter separation skid 30mm higher than the skid top, and the lower part of the natural gas filter separation skid is reserved to have an interface with the natural gas pigging skid recessed 30mm.

[0025] As a further improvement of this invention, the module design adopts a unified PDMS 3D design platform with an independent database structure. Equipment, piping, structure, electrical, instrumentation, and other disciplines can conduct collaborative design, with full inter-disciplinary linkage and full-scale 3D solid modeling. Furthermore, the design modeling is performed in a WYSIWYG manner, with unified design standards, which is the fundamental guarantee for the highly integrated module design.

[0026] Compared with existing technologies, the module for natural gas pipeline cleaning and filtration separation provided by this invention can effectively improve the construction quality of gas storage projects and reduce project costs. In addition, the modular device can make full use of the factory's sound quality management system and indoor construction environment, reduce the amount of on-site welding work, and greatly reduce the safety risks of on-site hot work. At the same time, the modular device is a mobile device, which is convenient for on-site handling and hoisting, has strong mobility, and high reusability. It can be repeatedly moved and used as a whole in multiple locations, which can improve the reuse rate of the equipment. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of a module for natural gas pipeline cleaning and filtration separation disclosed in one embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of the first orientation of a natural gas pigging skid according to an embodiment of the present invention;

[0029] Figure 3 This is a second-position schematic diagram of a natural gas pigging skid disclosed in one embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of the first orientation of a natural gas filtration and separation skid according to an embodiment of the present invention;

[0031] Figure 5 This is a second-position schematic diagram of a natural gas filtration and separation skid disclosed in one embodiment of the present invention;

[0032] In the picture:

[0033] 1: Ball cylinder; 2: Fully welded electric ball valve; 3: Fully welded pneumatic-hydraulic ball valve; 4: Ball cylinder bypass electric ball valve; 5: Ball cylinder bypass manual ball valve; 6: Ball cylinder bypass electric plug valve; 7: Ball cylinder vent valve assembly; 8: Ball cylinder water injection valve; 9: Ball cylinder balancing pipeline valve; 10: Ball cylinder drain valve assembly; 11: Inlet bypass valve assembly; 12: Inlet vent valve assembly; 13-1: Drainage pipeline interface with upper skid; 13-2: Natural gas pipeline interface with upper skid. 13'-1: Sewage pipeline interface with lower skid; 13'-2: Natural gas pipeline interface with lower skid; 14: Module and pipeline connection interface; 15-1: First instrument junction box; 16-1: First electrical junction box; 17-1: First filter separator; 18-1: Electric ball valve at the inlet of the first filter separator; 19-1: Manual ball valve at the outlet of the first filter separator; 20-1: Vent line of the first filter separator; 21-1: First... Filter separator drain valve assembly; 22-1: First filter separator water injection valve; 23-1: First filter separator inlet valve bypass; 24-1: First filter separator inlet and outlet differential pressure system; 15-2: Second instrument junction box; 16-2: Second electrical junction box; 17-2: Second filter separator; 18-2: Second filter separator inlet electric ball valve; 19-2: Second filter separator outlet manual ball valve; 20-2: Second filter separator vent line; 21-2: Second filter separator drain valve assembly; 22-2: Second filter separator water injection valve; 23-2: Second filter separator inlet valve bypass; 24-2: Second filter separator inlet and outlet differential pressure system; 25-1: First filter separator quick-opening blind flange; 25-2: Second filter separator quick-opening blind flange; 26: Skid; 27: DN450 pipeline; 28: Quick-opening blind flange; 29: Reducer; 30: Pipeline cleaning indicator. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] The present invention will now be described in further detail with reference to the accompanying drawings:

[0036] The present invention provides a module for natural gas pigging and filtration separation, the module comprising a natural gas pigging skid and a natural gas filtration separation skid.

[0037] Before a natural gas pipeline is put into operation, pipeline cleaning and sweeping operations are carried out using natural gas pigging skids to remove impurities generated during construction and pressure testing. After commissioning, regular pipeline cleaning operations are performed using natural gas pigging skids to remove accumulated wastewater, ferrous sulfide, and other contaminants from inside the pipeline. The pig enters and exits the pigging canister via a DN450 pipeline directly connected to the main pipeline, and works in conjunction with the pigisternext pipeline, venting system, sewage system, balancing system, and water injection system to complete the pigging and sweeping operations.

[0038] Before being pressurized by the compressor, the cleanliness of the natural gas must be ensured. The filter separator in the natural gas filtration and separation skid removes dust and impurities from the natural gas through filter elements, ensuring that the dust in the gas is ≤3μm, thus guaranteeing the cleanliness of the gas entering the compressor. Natural gas enters and exits the filter separator through the inlet and outlet pipelines, and together with the filter separator's venting system, sewage discharge system, differential pressure detection system, and water injection system, the natural gas filtration operation is completed.

[0039] This module is designed using the PDMS 3D design platform, a multi-disciplinary collaborative design system. Equipment, piping, structure, electrical, and instrumentation disciplines collaborate on design within the same database, ensuring standardized design practices. This module enables factory prefabrication and on-site assembly.

[0040] Example 1: Determining Module Size

[0041] Modular division is a key technology for implementing modular design and construction. Modular division is influenced and constrained by numerous factors. Besides functionality, the feasibility of module construction, disassembly, transportation, and reassembly must also be considered, particularly the limitations of vehicle transport capacity. During vehicle transport, the length of a single module depends on the road's turning radius, the width on the width of tollbooth intersections, and the height on the height of culverts, tunnels, power lines, and crossing pipelines. The dimensional restrictions for vehicle transport can be divided into three levels, as shown in Table 1.

[0042] Table 1 Classification of Limiting Dimensions for Automobile Transportation

[0043]

[0044] The dimensions of the natural gas pigging skid and the natural gas filtration and separation skid in the module are both 15.4m × 3.4m × 3.8m (length × width × height), which meets the Class B requirements for automobile transportation.

[0045] Example 2: Installation of steel structure, piping, and cables within the module.

[0046] Steel Structure Setup: The vertical connection nodes between the natural gas pigging skids and the natural gas filtration and separation skids utilize high-strength bolts for equal-strength connections, designed as steel joints. During installation and assembly, the upper skid is in a suspended, unstable state, making it prone to misalignment and deviation during welding, compromising weld quality and increasing on-site construction workload. High-strength bolt connections offer accurate positioning, reliable connection, and rapid construction. Bolted connections have significant advantages over welded connections and are the preferred vertical connection method between skids. The connection position between the upper and lower skids should ideally be located approximately 500mm below the lower flange of the upper skid beam.

[0047] Piping Setup: Pipes requiring vertical or horizontal splicing between skids are generally pre-welded or prefabricated for on-site assembly. Generally, pipes with a diameter ≥400mm are pre-welded, and flange connections are rarely used. After the module disassembly plan is determined, the location and connection method of the pre-reserved ports between each skid must be determined based on the plan. The general principle for pre-reserved ports is: straight ports should be reserved over bends, ports should be left open rather than upturned, small ports should be reserved over large ports, and long ports should be reserved over short ports. For pipelines running straight through two skids in this module, flanges are added at the skid boundary; pipelines inside the skid connecting to the pipe rack extend 200mm outside the skid, with pre-reserved welding interfaces. When disassembling the pipeline, disassembly is performed at the flange connection between the skids; pipelines extending outside the skid are loaded and transported with the skids; pipelines that cannot be loaded and transported with the skids are disconnected at the nearest weld joint on the skid.

[0048] Cable installation: Each skid is equipped with an independent electrical and instrument junction box, with external interfaces being cable connectors.

[0049] Example 3: Module for natural gas pipeline cleaning and filtration separation

[0050] like Figure 1 As shown, this invention provides a module for natural gas pipeline cleaning and filtration separation. The module includes a natural gas pipeline cleaning skid and a natural gas filtration separation skid. The natural gas pipeline cleaning skid is located on the lower layer, and the natural gas filtration separation skid is located on the upper layer. The vertical connection between the natural gas pipeline cleaning skid and the natural gas filtration separation skid uses high-strength bolts for equal-strength connection, designed as a steel joint. The connection position between the upper and lower skids is located approximately 500mm below the lower flange of the beam on the upper skid. Pipelines passing directly through the two skids are flanged at the skid boundary. Pipelines connecting to the pipe rack inside the skid extend 200mm outside the skid, with pre-reserved welding interfaces.

[0051] Example 4: Natural Gas Pipeline Pigment Skid

[0052] like Figures 2-3As shown, the natural gas pigging skid includes: a ball cylinder 1; a fully welded electric ball valve 2; a fully welded gas-liquid linkage ball valve 3; a ball cylinder bypass electric ball valve 4; a ball cylinder bypass manual ball valve 5; a ball cylinder bypass electric plug valve 6; a ball cylinder vent valve assembly 7; a ball cylinder water injection valve 8; a ball cylinder balancing pipeline valve 9; a ball cylinder drain valve assembly 10; an inlet bypass valve assembly 11; an inlet vent valve assembly 12; a drain pipeline interface to the upper skid 13-1; a natural gas pipeline interface to the upper skid 13-2; a module to the pipeline network connection interface 14; a first instrument junction box 15-1; a first electrical junction box 16-1; a skid base 26; a DN450 pipeline 27; a quick-opening blind flange 28; and a reducer 29.

[0053] During normal operation: Natural gas enters the station via DN450 pipeline 27, which is directly connected to the main pipeline. The ball valve 4 (bypass electric ball valve) is open, and the fully welded electric ball valve 2 is closed. Open the inlet bypass valve group 11. When the pressure difference across the fully welded gas-liquid linkage ball valve 3 is small, open the fully welded gas-liquid linkage ball valve 3. After the fully welded gas-liquid linkage ball valve 3 is open, close the inlet bypass valve group 11. Natural gas enters the station through the fully welded gas-liquid linkage ball valve 3 and the ball valve 4, and then travels to the natural gas filter and separation skid via the natural gas pipeline and the upper skid interface 13-2.

[0054] When a fault occurs in the external section of the DN450 main pipeline connected to the fully welded pneumatic-hydraulic linkage ball valve 3 and venting is required: the fully welded pneumatic-hydraulic linkage ball valve 3 is closed, the inlet venting valve group 12 is opened, and the venting operation is carried out through the module and pipeline connection interface 14.

[0055] During natural gas pigging operations: Open the vent valve assembly 7 and the balancing pipeline valve 9 of the pigging cylinder. Simultaneously, ensure that the following valves are closed: the manual bypass ball valve 5, the electric bypass plug valve 6, the fully welded electric ball valve 2, the fully welded gas-hydraulic linkage ball valve 3, the electric bypass ball valve 4, the water injection valve 8, and the drain valve assembly 10 of the pigging cylinder. Vent the pigging cylinder to confirm that there is no pressure inside. Open the quick-opening blind flange 28 of the pigging cylinder 1, insert the pigging tool, and tighten it at the reducer 29. Close the quick-opening blind flange 28, close the vent valve assembly 7 and the balancing pipeline valve 9 of the pigging cylinder, and open the manual bypass ball valve 5, the electric bypass plug valve 6, the fully welded electric ball valve 2, and the fully welded gas-hydraulic linkage ball valve 3. The pigging tool enters the main pipeline, and the pigging operation begins.

[0056] During natural gas pigging operations: Before the pig reaches the pig cylinder 1, close the pig cylinder bypass electric ball valve 4, and open the fully welded electric ball valve 2, the fully welded gas-hydraulic linkage ball valve 3, the pig cylinder bypass manual ball valve 5, the pig cylinder bypass electric plug valve 6, the pig cylinder vent valve group 7, and the pig cylinder drain valve group 10. After confirming that the pig has entered the pig cylinder 1 through the pigging indicator 30 at the pig cylinder inlet, open the pig cylinder bypass electric ball valve 4, and close the fully welded electric ball valve 2, the fully welded gas-hydraulic linkage ball valve 3, the pig cylinder bypass manual ball valve 5, and the pig cylinder bypass electric plug valve 6. After all the pressure inside the pig cylinder has been released, open the pig cylinder water injection valve 8 to inject clean water to wet the inside of the pig cylinder, and then open the quick-opening blind flange 28 to remove the pig. The pigging operation is now complete.

[0057] Both the sewage pipeline and the upper skid interface 13-1 and the natural gas pipeline and the upper skid interface 13-2 are flanged connections. The skid interface extends 30mm beyond the top of the skid. The skid and pipeline connection interface 14 are located on both sides of the skid and are welded interfaces.

[0058] All instrument cables inside the skid are connected to the first instrument junction box 15-1; all electrical cables inside the skid are connected to the first electrical junction box 16-1. Each skid layer has an independent electrical and instrumentation system.

[0059] Example 5: Natural Gas Filtration and Separation Skid

[0060] like Figures 4-5 As shown, the natural gas filtration and separation skid includes: a first filter separator 17-1; a second filter separator 17-2; an electric ball valve 18-1 at the inlet of the first filter separator; an electric ball valve 18-2 at the inlet of the second filter separator; a manual ball valve 19-1 at the outlet of the first filter separator; a manual ball valve 19-2 at the outlet of the second filter separator; a vent pipe 20-1 for the first filter separator; a vent pipe 20-2 for the second filter separator; a drain valve assembly 21-1 for the first filter separator; a drain valve assembly 21-2 for the second filter separator; a water injection valve 22-1 for the first filter separator; and a second filter separator... Water injection valve 22-2 for the separator; bypass valve 23-1 for the inlet of the first filter separator; bypass valve 23-2 for the inlet of the second filter separator; differential pressure system 24-1 for the inlet and outlet of the first filter separator; differential pressure system 24-2 for the inlet and outlet of the second filter separator; quick-opening blind flange 25-1 for the first filter separator; quick-opening blind flange 25-2 for the second filter separator; skid 26; interface 13'-1 between the sewage pipeline and the lower skid; interface 13'-2 between the natural gas pipeline and the lower skid; interface 14 between the module and the pipeline network; second instrument junction box 15-2; second electrical junction box 16-2; filter element. Filter elements are respectively installed in the first filter separator 17-1 and the second filter separator 17-2.

[0061] During normal operation: Before gas intake, first open the manual ball valve 19-1 at the outlet of the first filter separator. After natural gas enters the pipeline via the natural gas pipeline and the lower skid interface 13'-2, first open the bypass valve 23-1 at the inlet of the first filter separator. When the pressure difference across the electric ball valve 18-1 at the inlet of the first filter separator is small, open the electric ball valve 18-1 at the inlet of the first filter separator. After opening the electric ball valve 18-1 at the inlet of the first filter separator, close the bypass valve 23-1 at the inlet of the first filter separator. Natural gas enters the first filter separator 17-1 through the electric ball valve 18-1 at the inlet of the first filter separator, and after filtration, it is discharged through the manual ball valve 19-1 at the outlet of the first filter separator, completing the filtration and separation operation. The electric ball valve 18-2 at the inlet of the second filter separator and the manual ball valve 19-2 at the outlet of the second filter separator are in the closed state.

[0062] When the first filter separator is under regular maintenance or the filter element is replaced: After the second filter separator is started and enters normal operation, gradually close the electric ball valve 18-1 at the inlet of the first filter separator, then close the manual ball valve 19-1 at the outlet of the first filter separator, open the vent pipe 20-1 of the first filter separator to drain the gas inside the first filter separator 17-1, open the water injection valve 22-1 of the first filter separator to inject clean water and wet the inside of the first filter separator 17-1, open the drain valve group 21-1 of the first filter separator, and drain the accumulated liquid and filtered dirt through the drain pipe and the lower skid interface 13'-1, open the quick-opening blind flange 25-1 of the first filter separator, and remove the filter element for replacement.

[0063] The differential pressure systems 24-1 and 24-2 at the inlet and outlet of the filter separator can determine whether the filter separator is blocked based on the pressure difference.

[0064] The module and pipeline connection interface 14 are located on both sides of the skid block and are welded interfaces.

[0065] All instrument cables inside the skid are connected to the second instrument junction box 15-2; all electrical cables inside the skid are connected to the second electrical junction box 16-2. Each skid layer has an independent electrical and instrumentation system.

[0066] in conclusion:

[0067] The specific embodiments disclose a module for natural gas pipeline cleaning and filtration separation. This module features high integration, complete functionality, factory prefabrication, a compact structure, and ease of installation and transportation. It occupies a small area, saving investment and construction time, significantly reducing on-site construction work, facilitating project management, and allowing for easy relocation and reuse in multiple locations. This module is suitable for both newly built gas storage facilities and the renovation of existing ones.

[0068] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A module for natural gas pipeline cleaning and filtration separation, characterized in that, include: Natural gas pigging skid and natural gas filtration and separation skid; The skid seat of the natural gas pigging skid is connected to the skid seat of the natural gas filtration and separation skid. The natural gas inlet of the natural gas pigging skid is connected to the natural gas pipeline network. The natural gas outlet of the natural gas pigging skid is connected to the natural gas inlet of the natural gas filtration and separation skid. The natural gas outlet of the natural gas filtration and separation skid is connected to the natural gas pipeline network. The natural gas filtration and separation skid is located on the upper layer, and the skid seat of the natural gas pigging skid is connected to the skid seat of the natural gas filtration and separation skid by bolts. The natural gas pigging skid includes: an instrument junction box, an electrical junction box, a skid base, a natural gas pig launcher / receiver, a main pipeline, a bypass pipeline, and valve assemblies installed on the pipeline; The first end of the main pipeline is connected to the natural gas pipeline network, the second end of the main pipeline is connected to the natural gas launcher and receiver tube, the middle part of the main pipeline is connected to the bypass pipeline, and the bypass pipeline is connected to the natural gas filter and separation skid. The bypass pipeline includes: a ball cylinder bypass electric ball valve, a ball cylinder bypass manual ball valve, a ball cylinder bypass electric plug valve, an inlet bypass valve group, an inlet vent valve group, and an interface with the upper skid block; The natural gas filtration and separation skid includes: an instrument junction box, an electrical junction box, a skid base, at least one filtration and separation device, pipelines, and valve assemblies installed on the pipelines; the natural gas inlet of the filtration and separation device is connected to the natural gas outlet of the natural gas pigging skid, and the natural gas outlet of the filtration and separation device is connected to the natural gas pipeline network; The filtration and separation device includes: a filter element, a filter separator, a filter separator inlet pipe, a filter separator outlet pipe, a filter separator vent pipe, a filter separator drain pipe, a filter separator water injection pipe, a filter separator inlet and outlet differential pressure system, and valve assemblies installed on the pipes; the filter element is installed in the filter separator; the filter separator inlet pipe and the filter separator outlet pipe are connected through the filter separator; one end of the filter separator vent pipe is connected to the filter separator, and the other end is connected to the natural gas pipeline vent system; one end of the filter separator drain pipe is connected to the filter separator, and the other end is connected to the natural gas pipeline main drain pipe; one end of the filter separator water injection pipe is connected to the filter separator, and the other end is connected to the atmosphere; the filter separator inlet and outlet differential pressure system is connected to the filter separator inlet pipe and the filter separator outlet pipe, respectively.

2. The module according to claim 1, characterized in that, The natural gas transceiver pylon includes: a reducer, a quick-opening blind flange, a pylon, a pylon water injection valve, a pylon balancing pipeline valve, a pylon drain valve assembly, and a vent valve assembly.

3. The module according to claim 1, characterized in that, The main pipeline includes: a fully welded electric ball valve and a fully welded pneumatic-hydraulic ball valve.

4. The module according to claim 1, characterized in that, The filtration and separation devices are connected to each other via pipelines at their respective filter inlets.

5. The module according to claim 1, characterized in that, The filter separator inlet pipeline includes an electric ball valve for the filter separator inlet and a bypass valve for the filter separator inlet; the filter separator outlet pipeline includes a manual ball valve for the filter separator outlet; the filter separator drain pipeline includes a filter separator drain valve assembly; and the filter separator water injection pipeline includes a filter separator water injection valve.

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