Skid-mounted natural gas in-station separation device

Abstract

The utility model discloses a skid-mounted natural gas in-station separation device which comprises a skid-mounted base, a gravity separator is fixed on the skid-mounted base, and the lower layer of the gravity separator is communicated with a first blow-off pipeline, an instrument air pipeline, a purging pipeline and a sand flushing pipeline through valve assemblies respectively. The upper layer of the gravity separator is respectively communicated with a natural gas pipeline inlet, an emptying pipeline and a blowing pipeline, and the rear end of the gravity separator is communicated with a filtering and separating system through a gathering pipe, the design is reasonable, the structure is compact and reliable, the occupied area is saved, the prefabrication degree of a factory is improved, the construction quality can be improved, and the construction cost is reduced. And the construction period can be effectively shortened.

Description

Technical Field

[0001] The utility model belongs to the technical field of natural gas separation, and relates to a skid-mounted natural gas inlet separation device. Background Art

[0002] As an important clean energy source, natural gas typically undergoes a series of pretreatment processes to ensure its quality and safety before entering pipelines or processing facilities. Separation at the inlet is a key step in this process, primarily aimed at removing liquid and solid impurities such as water, oil droplets, solid particles, and other non-methane components from the natural gas. This separation process is essential for the natural gas itself.

[0003] However, most existing gas field stations utilize decentralized natural gas inlet separation pipelines, which occupies a large area, requires a long construction period, and places stringent requirements on on-site construction conditions. Many stations are located in remote areas with poor supporting facilities, inconvenient transportation, and difficulty transporting equipment and pipes. Once the equipment and pipes arrive, they need to be stored, which consumes significant on-site space. Therefore, a skid-mounted natural gas inlet separation system is necessary to address these issues. Utility Model Content

[0004] In view of the above problems and to overcome the defects of the existing technology, the present invention proposes a skid-mounted natural gas station separation device. The purpose of the present invention is to: have a reasonable design, a compact and reliable structure, save floor space, and improve the degree of factory prefabrication, which can not only improve the construction quality, but also effectively shorten the construction period.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: the present invention includes a skid-mounted base, on which a gravity separator is fixed, the lower layer of the gravity separator is connected to the first sewage pipeline, the instrument air pipeline, the purge pipeline and the sand flushing pipeline through the valve assembly, the upper layer of the gravity separator is connected to the natural gas pipeline inlet, the vent pipeline and the blowing pipeline, and the rear end of the gravity separator is connected to the filtration and separation system through the manifold.

[0006] Preferably, the first sewage discharge pipeline is divided into a first main pipeline and a first branch pipeline, the first main pipeline is connected to the middle lower end of the gravity separator, the first branch pipeline is connected to the rear lower end of the gravity separator, the first main pipeline and the first branch pipeline are connected to the filter separator respectively, the first main pipeline and the first branch pipeline are both connected to the sewage reserved port, the first main pipeline and the first branch pipeline are both arranged along the edge of the skid, and the instrument air pipeline is arranged beside the first main pipeline.

[0007] Preferably, the sand flushing pipeline is connected to the bottom of the gravity separator and is connected to the edge of the skid-mounted base.

[0008] Preferably, the natural gas pipeline inlet is connected to the front end of the gravity separator.

[0009] Preferably, the filtration and separation system includes a filter separator, a natural gas pipeline outlet and a second sewage pipeline, the second sewage pipeline is connected to the bottom of the filter separator, the outlet end of the second sewage pipeline is connected to the first sewage pipeline, the natural gas pipeline outlet is connected to the bottom of the filter separator, and the natural gas pipeline outlet is located at the bottom of the lower layer of the gravity separator.

[0010] Preferably, the second sewage discharge pipeline is led out from the middle and bottom of the filter separator respectively, and the second sewage discharge pipeline merges at the skid-mounted base of the gravity separator and enters the first sewage discharge pipeline.

[0011] Preferably, the purge pipeline is arranged along the lower layer of the gravity separator. The purge pipeline is located at the bottom of the skid-mounted base and is arranged beside the natural gas pipeline inlet, and is arranged at the natural gas pipeline outlet of the filter separator. The instrument air pipeline is led to the side of the pneumatic valve on the lower layer of the gravity separator.

[0012] Preferably, the vent pipeline includes a manual vent pipeline and an automatic vent pipeline, and the manual vent pipeline and the automatic vent pipeline are installed in parallel.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The utility model realizes the reasonable design of the upper and lower layers of the gravity separator, the filter separator and the multi-pipeline by performing three-layer installation on the skid-mounted base, thereby reducing the occupied area, making the overall structure compact and improving the construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the process flow of the natural gas station separation module of the utility model;

[0016] Figure 2 This is a top view of the natural gas inlet separation module of the utility model;

[0017] Figure 3 This is a bottom view of the natural gas station separation module of the present invention;

[0018] Figure 4 This is an axonometric diagram of the natural gas station separation module of the present invention.

[0019] Figure numerals: 1. Filter separator; 2. Manual vent line; 3. Automatic vent line; 4. Instrument air line; 5. Gravity separator; 6. First sewage line; 9. Natural gas line inlet; 10. Natural gas line outlet; 11. Vent line; 13. Manifold; 14. First main line; 15. First branch line; 16. Sewage reserved port; 17. Second sewage line; 18. Pneumatic valve; 19. Skid-mounted base. DETAILED DESCRIPTION

[0020] 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 making creative efforts are within the scope of protection of the present invention.

[0021] The following is combined with Figure 1-4 The specific implementation methods of the present utility model are further described in detail.

[0022] In this embodiment, by Figure 1-4 As shown, the present invention includes a skid-mounted base 19, on which a gravity separator 5 is fixed. The lower layer of the gravity separator 5 is connected to a first sewage discharge pipeline 6, an instrument air pipeline 4, a purge pipeline, and a sand flushing pipeline through a valve assembly. The upper layer of the gravity separator 5 is connected to a natural gas pipeline inlet 9, a venting pipeline 11, and a blowing pipeline. The rear end of the gravity separator 5 is connected to the filtration and separation system through a manifold 13.

[0023] The vent line 11 is connected to the gravity separator 5 and the natural gas pipeline outlet 10;

[0024] The air blowing pipeline 12 is connected to the natural gas pipeline inlet 9 and the venting pipeline 11.

[0025] In this embodiment, by Figure 2-4 As shown, the first sewage discharge pipeline 6 is divided into a first main pipeline 14 and a first branch pipeline 15. The first main pipeline 14 is connected to the middle lower end of the gravity separator 5, and the first branch pipeline 15 is connected to the rear lower end of the gravity separator 5. The first main pipeline 14 is mainly composed of a ball valve and a regulating valve, and is equipped with a sewage discharge reserved port 16. The first branch pipeline 15 is mainly composed of a ball valve and a gate valve, and the gate valve is installed at an angle. The first main pipeline 14 and the first branch pipeline 15 are respectively connected to the filter separator 1. The first main pipeline 14 and the first branch pipeline 15 are both connected to the sewage discharge reserved port 16. The first main pipeline 14 and the first branch pipeline 15 are both arranged along the edge of the skid, and the instrument air pipeline 4 is arranged next to the first main pipeline 14.

[0026] In this embodiment, by Figure 4 As shown, the sand flushing pipeline is connected to the bottom of the gravity separator 5 and is connected to the edge of the skid-mounted base 19.

[0027] In this embodiment, by Figure 4 As shown, the natural gas pipeline inlet 9 is connected to the front end of the gravity separator 5.

[0028] In this embodiment, by Figure 1-4 As shown, the filtration and separation system includes a filter separator 1, a natural gas pipeline outlet 10 and a second sewage pipeline 17. The second sewage pipeline 17 is connected to the bottom of the filter separator 1, and the outlet end of the second sewage pipeline 17 is connected to the first sewage pipeline 6. The natural gas pipeline outlet 10 is connected to the bottom of the filter separator 1, and the natural gas pipeline outlet 10 is located at the bottom of the lower layer of the gravity separator 5.

[0029] In this embodiment, by Figure 4 As shown, the second sewage pipe 17 is led out from the middle and bottom of the filter separator 1 respectively, and the second sewage pipe 17 converges at the skid-mounted base 19 of the gravity separator 5 and enters the first sewage pipe 6. The first sewage pipe 6 and the second sewage pipe 17 are both connected to the sewage reserved port 16.

[0030] In this embodiment, by Figure 4 As shown, the purge pipeline 7 is arranged along the lower layer of the gravity separator 5. The purge pipeline 7 is located at the bottom of the skid-mounted base 1 and is arranged next to the natural gas pipeline inlet 9. It is arranged at the natural gas pipeline outlet 10 of the filter separator 1. The instrument air pipeline 4 is led to the side of the pneumatic valve 18 in the lower layer of the gravity separator 5.

[0031] In this embodiment, by Figure 2-4 As shown, the venting pipeline 11 includes a manual venting pipeline 2 and an automatic venting pipeline 3, and the manual venting pipeline 2 and the automatic venting pipeline 3 are installed in parallel.

[0032] In this embodiment, by Figure 1-4As shown, gravity separation: natural gas first enters the gravity separator 5, which is designed as a two-layer structure. The liquid (such as water droplets) and solid particles (such as sand particles) carried by the natural gas naturally settle to the bottom under the action of gravity because their density is greater than that of the gas. The first layer includes a first sewage pipe 6, an instrument air pipe 4 and a sand flushing pipe. The first sewage pipe 6 is responsible for collecting the settled liquid and solids, and is divided into a first main pipe 14 and a first branch pipe 15. The first main pipe 14 is equipped with a ball valve and a regulating valve to facilitate the control of the discharge volume; the first branch pipe 15 is equipped with a gate valve and is installed at an angle for easy maintenance and space saving. The instrument air pipe 4 provides the air source required by the pneumatic valve 18 and is arranged adjacent to the first main pipe 14. The sand flushing pipe is used to remove solid particles deposited at the bottom. The second layer concentrates the flow path of natural gas, including a natural gas pipeline inlet 9 and a natural gas pipeline outlet 10. After preliminary separation, the natural gas is introduced into the manifold 13 through a valve and then transported to the filter separator 1 for further purification;

[0033] Filtration separation: The natural gas coming out of the gravity separator 5 is collected through the manifold 13 and then enters the filter separator 1, where fine particles are further removed to ensure the purity of the natural gas;

[0034] Vent line 11 and purge line 7: Vent line 11 is divided into manual vent line 2 and automatic vent line 3. The two lines are connected in parallel at the end. The discharge of natural gas is controlled by a ball valve, a safety valve (automatic), and a throttling stop vent valve (manual) to deal with overpressure or maintenance needs.

[0035] The purge line 7 is used to clean the pipeline regularly to ensure the smooth flow of natural gas;

[0036] Filter separator 1: Used to capture and filter out residual tiny solid particles in natural gas to achieve a higher level of gas purity. An integrated sewage system and natural gas pipeline inlet 9 ensure that impurities in the incoming natural gas have an opportunity to be initially discharged before filtration.

[0037] The second sewage pipe 17 is led out from the middle and bottom of the filter separator 1, and finally merges into the sewage manifold 13 at the bottom of the skid base 19. This design facilitates the effective collection and removal of separated impurities.

[0038] The natural gas pipeline outlet 10 is led out from the bottom of the filter separator 1. The pipeline routing takes space optimization into consideration and is first arranged along the bottom of the second layer of the gravity separator 5, then lifted near the edge of the skid, and finally a valve is set on the second layer, also for easy operation and maintenance;

[0039] Purge pipeline 7: Purge pipeline 7 is arranged along the bottom of the second-layer skid and directly reaches the natural gas inlet area of ​​the filter separator 1. It is used to regularly remove residues inside the pipeline to maintain smooth airflow;

[0040] Instrument air duct 4: supplies the compressed air required by the second-layer pneumatic valve 18 to ensure that the valve can move accurately as required, improving the system automation level and stability.

[0041] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, 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 skid-mounted natural gas inlet separation device, comprising a skid-mounted base, characterized in that: A gravity separator is fixed on the skid-mounted base. The lower layer of the gravity separator is connected to the first sewage pipeline, the instrument air pipeline, the purge pipeline and the sand flushing pipeline through the valve assembly respectively. The upper layer of the gravity separator is connected to the natural gas pipeline inlet, the vent pipeline and the blow pipeline respectively. The rear end of the gravity separator is connected to the filtration and separation system through the manifold.

2. The skid-mounted natural gas inlet separation device according to claim 1, characterized in that: The first sewage discharge pipeline is divided into a first main pipeline and a first branch pipeline. The first main pipeline is connected to the middle lower end of the gravity separator, and the first branch pipeline is connected to the rear lower end of the gravity separator. The first main pipeline and the first branch pipeline are respectively connected to the filter separator. The first main pipeline and the first branch pipeline are both connected to the sewage reserved port. The first main pipeline and the first branch pipeline are both arranged along the edge of the skid, and the instrument air pipeline is arranged beside the first main pipeline.

3. The skid-mounted natural gas inlet separation device according to claim 1, characterized in that: The sand flushing pipeline is connected to the bottom of the gravity separator and is connected to the edge of the skid-mounted base.

4. The skid-mounted natural gas inlet separation device according to claim 1, characterized in that: The natural gas pipeline inlet is connected to the front end of the gravity separator.

5. The skid-mounted natural gas inlet separation device according to claim 2, characterized in that: The filtration and separation system includes a filtration separator, a natural gas pipeline outlet and a second sewage pipeline. The second sewage pipeline is connected to the bottom of the filtration separator, and the outlet end of the second sewage pipeline is connected to the first sewage pipeline. The natural gas pipeline outlet is connected to the bottom of the filtration separator, and the natural gas pipeline outlet is located at the bottom of the lower layer of the gravity separator.

6. The skid-mounted natural gas inlet separation device according to claim 5, characterized in that: The second sewage discharge pipeline is respectively led out from the middle and bottom of the filter separator, and the second sewage discharge pipeline is merged at the skid-mounted base of the gravity separator and enters the first sewage discharge pipeline.

7. The skid-mounted natural gas inlet separation device according to claim 1, characterized in that: The purge pipeline is arranged along the lower layer of the gravity separator. The purge pipeline is located at the bottom of the skid-mounted base and is arranged next to the natural gas pipeline inlet. It is arranged to the natural gas pipeline outlet of the filter separator. The instrument air pipeline is led to the side of the pneumatic valve on the lower layer of the gravity separator.

8. The skid-mounted natural gas inlet separation device according to claim 1, characterized in that: The venting pipeline includes a manual venting pipeline and an automatic venting pipeline, and the manual venting pipeline and the automatic venting pipeline are installed in parallel.

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