Pipeline natural gas sample collection device

Abstract

The utility model discloses a pipeline natural gas sample collecting device which comprises an outer separating pipe, an inner separating pipe, a shell, a pipeline fan, a connecting pipe, a condensing device, an electric heating rod and an electric heating sleeve. The device is simple in structure and convenient to use, the device is installed at a sampling valve pipe opening of the natural gas conveying pipeline, gas, solid and liquid three-phase separation can be achieved in the collecting process, and different samples are obtained; after corresponding impurities of the whole device or corresponding parts are weighed, the impurity content can be calculated through simple calculation, and subsequent inspection and further analysis are facilitated; the solid-liquid impurity separation device is thorough in solid-liquid impurity separation and accurate in sampling result.

Description

Technical Field

[0001] The utility model belongs to the technical field of natural gas sampling inspection, and particularly relates to a sampling device for pipeline-transported natural gas. Background Art

[0002] Natural gas is transported from the mining area or treatment plant to the urban gas distribution center, industrial enterprise users, etc. through a transportation pipeline. Common impurities in pipeline-transported natural gas include solid impurities (such as sand grains, rock fragments), liquid impurities (water, oil, where oil refers to condensate oil, such as alkanes, cycloalkanes, etc.), and gas impurities (hydrogen sulfide, carbon dioxide). These impurities not only affect the quality of natural gas, but also affect the normal operation of pipeline facilities and reduce the service life. Therefore, the sampling of pipeline-transported natural gas is one of the regular sampling tasks. In the prior art, a sampler is installed at the sampling valve of the natural gas transportation pipeline for sampling. Some samplers only have the function of sampling and cannot separate the solid and liquid impurities therein, resulting in troublesome subsequent laboratory treatment. Some samplers (a sampler for analyzing solid-liquid mixture impurities in a natural gas pipeline with the application number 2009200198765) can separate the solid and liquid impurities from the gas, but the impurities trapped by the ceramic filter element are difficult to collect, and the collected solid and liquid impurities are mixed together, which is not convenient for subsequent detection and analysis. Moreover, the side wall window of the sleeve will also affect the gas swirling effect, resulting in a reduction in the sedimentation-collected impurities. Therefore, it is very necessary to develop a sampling device for pipeline-transported natural gas that can solve the above problems. Content of the Utility Model

[0003] The purpose of the utility model is to provide a sampling device for pipeline-transported natural gas that can separate solid and liquid impurities, is easy to collect, and is efficient.

[0004] The object of the present utility model is achieved as follows. It includes an outer separation tube, an inner separation tube, a housing, a duct fan, a connecting tube, a condensation device, an electric heating rod, and an electric heating sleeve. The top of the outer separation tube is closed, and the lower part of the outer separation tube is gradually tapered. The bottom of the outer separation tube is detachably connected to a collection hood through an internal and external thread structure. The collection hood is in the shape of a funnel with a large top and a small bottom. The center of the bottom of the collection hood is provided with an electric heating rod, and the heating part of the electric heating rod is vertically located on the axis inside the collection hood. An electric heating sleeve is sleeved outside the collection hood. An air inlet pipe is provided on the upper side of the upper part of the outer separation tube. An inner separation tube is provided on the axis inside the outer separation tube. The upper end of the inner separation tube passes out of the outer separation tube. A first spiral blade that spirally descends is provided on the upper part of the outer tube body of the inner separation tube, and the first spiral blade is located inside the outer separation tube. The upper end of the inner separation tube is connected to the connecting tube through a duct fan, and the connecting tube is connected to the air inlet of the condensation device. An exhaust pipe is provided on the side of the upper end of the inner separation tube. A valve is provided on the tube body of the inner separation tube between the exhaust pipe and the duct fan. The housing is fixedly provided on the upper part outside the outer separation tube, and the upper part of the outer separation tube, the duct fan, the connecting tube, and the condensation device are located inside the housing. The air inlet pipe and the exhaust pipe both pass through the housing. A second spiral blade is provided in the lower part of the inner separation tube. A plurality of curved openings that gradually contract from the inside to the outside are formed on the tube wall of the inner separation tube above the second spiral blade. The plurality of curved openings are centered on the axis of the inner separation tube and are arranged in an annular array pattern, and the curved openings are inclined in the air flow rotation direction of the outer separation tube.

[0005] Wherein, brackets for supporting the device can be provided at the bottom of the housing to facilitate placing the device and keep the outer separation tube vertical at the same time. These brackets are all well-known support structures in the art and will not be elaborated here. For the condensation device, it can be various condensation devices well-known to those skilled in the art and can cool down to the degree where the steam condenses into liquid. The housing covers the components at the upper part of the device to form protection.

[0006] Before the device is used, it can be weighed as a whole, and then weighed together with the impurities collected by the collection hood. According to the amount of the gas sample collected, the total content of solid and liquid impurities in the natural gas can be calculated after conversion. Then, the liquid impurities are weighed, and the content of solid impurities and liquid impurities can be further calculated.

[0007] Preferably, the lower end of the inner separation tube is in the shape of a flared open end.

[0008] Preferably, a collection container is connected to the liquid outlet of the condensation device. A partition is provided in the middle of the housing. The collection container is placed on the partition. A hatch is provided on the side of the housing corresponding to the collection container. After the hatch is opened, the collection container can be taken out and placed in.

[0009] Preferably, the valve is a manual valve, and a hatch is provided on the side of the housing corresponding to the valve.

[0010] Preferably, the valve is a solenoid valve, which is well-known to those skilled in the art.

[0011] Advantages of the present utility model: The structure of the present utility model is simple and convenient to use. The device can be installed at the sampling valve nozzle of the natural gas transmission pipeline. During the sampling process, gas-solid-liquid three-phase separation can be achieved to obtain different samples. After weighing the whole device, corresponding components or corresponding impurities, the impurity content can be calculated through simple calculations, which is also convenient for subsequent submission for further analysis. The solid-liquid impurities of the present utility model are completely separated, and the sampling result is accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic internal structure diagram of the present utility model;

[0013] Figure 2 is a schematic external structure diagram of the present utility model;

[0014] Figure 3 is a schematic internal structure diagram of the inner separation tube;

[0015] Figure 4 is a schematic transverse sectional structure diagram of the inner separation tube;

[0016] In the figure: 1 - outer separation tube, 2 - inner separation tube, 3 - outer shell, 4 - pipeline fan, 5 - connecting pipe, 6 - condensation device, 7 - electric heating rod, 8 - electric heating sleeve, 9 - collection hood, 10 - intake pipe, 11 - first spiral blade, 12 - exhaust pipe, 13 - valve, 14 - second spiral blade, 15 - curved opening, 16 - collection container, 17 - partition board. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The present utility model will be further described below in conjunction with the embodiments and the drawings, but the present utility model is not limited in any way. Any transformation or replacement based on the teachings of the present utility model falls within the protection scope of the present utility model.

[0018] Embodiment 1

[0019] As shown in the atta Figures 1 to 4As shown in the figure, the pipeline natural gas sample collection device of this embodiment includes an outer separation pipe 1, an inner separation pipe 2, a housing 3, a pipeline fan 4, a connecting pipe 5, a condensation device 6, an electric heating rod 7, and an electric heating sleeve 8. The top of the outer separation pipe 1 is closed, the lower part of the outer separation pipe 1 is gradually tapered, the bottom of the outer separation pipe 1 is detachably connected to the collection cover 9 through an internal and external thread structure. The collection cover 9 is in the shape of a funnel with a large top and a small bottom. The center of the bottom of the collection cover 9 is provided with an electric heating rod 7, and the heating part of the electric heating rod 7 is vertically located at the axis inside the collection cover 9. An electric heating sleeve 8 is sleeved outside the collection cover 9. An air inlet pipe 10 is provided on the side of the upper part of the outer separation pipe 1. An inner separation pipe 2 is provided at the axis inside the outer separation pipe 1. The upper end of the inner separation pipe 2 passes out of the outer separation pipe 1. The upper part of the outer wall of the inner separation pipe 2 is provided with a first spiral blade 11 that spirally descends, and the first spiral blade 11 is located inside the outer separation pipe 1. The upper end of the inner separation pipe 2 is connected to the connecting pipe 5 through the pipeline fan 4, and the connecting pipe 5 is connected to the air inlet of the condensation device 6. An exhaust pipe 12 is provided on the side of the upper end of the inner separation pipe 2, and a valve 13 is provided on the pipe wall of the inner separation pipe 2 between the exhaust pipe 12 and the pipeline fan 4. The housing 3 is fixedly arranged on the upper part outside the outer separation pipe 1, and the upper part of the outer separation pipe 1, the pipeline fan 4, the connecting pipe 5, and the condensation device 6 are located inside the housing 3. The air inlet pipe 10 and the exhaust pipe 12 both pass through the housing 3. A second spiral blade 14 is provided in the lower part of the inner separation pipe 2. A plurality of curved openings 15 that gradually contract from the inside to the outside are opened on the pipe wall of the inner separation pipe 2 above the second spiral blade 14. The plurality of curved openings 15 are centered on the axis of the inner separation pipe 2 and are arranged in an annular array pattern, and the curved openings 15 are inclined in the air flow rotation direction of the outer separation pipe 1. The liquid outlet of the condensation device 6 is connected to a collection container 16. A partition 17 is provided in the middle of the housing 3. The collection container 16 is placed on the partition 17, and a hatch is provided on the side of the housing 3 corresponding to the collection container 16. The valve 13 is a solenoid valve.

[0020] Embodiment 2

[0021] The pipeline natural gas sample collection device of this embodiment is based on Embodiment 1. The difference from Embodiment 1 is that the lower end of the inner separation pipe 2 is a flared open end, the valve 13 is a manual valve, and a hatch is provided on the side of the housing 3 corresponding to the valve 13; the control of the valve 13 is completed manually, and the hatch can be opened first before operation.

[0022] Working principle and process of the utility model: First, connect the intake pipe 10 to the sampling valve of the natural gas pipeline and ensure that the outer separation pipe 1 is vertical; natural gas enters the outer separation pipe 1 from the intake pipe 10, is guided by the first spiral blade 11 to form a swirling air flow. Under the action of centrifugal force, the liquid and solid impurities in the natural gas are thrown to the wall of the outer separation pipe 1 and settle downward into the collection hood 9 to complete the first separation; then the air flow enters the inner separation pipe 2. During the accelerating upward process, it is first guided by the second spiral blade 14 and then when passing through the curved opening, the remaining solid and liquid impurities in the gas are thrown to the wall of the inner separation pipe 2 and return to the outer separation pipe 1 through the curved opening 15 for secondary separation; these solid and liquid impurities are continuously thrown to the wall of the outer separation pipe 1 by the swirling air flow in the outer separation pipe 1 and settle into the collection hood 9; due to the structure of the curved opening 15 with a larger inner diameter and a smaller outer diameter and being inclined in the swirling air flow direction of the outer separation pipe 1, the swirling air flow in the outer separation pipe 1 will not enter the inner separation pipe 2 through the curved opening 15, effectively ensuring the stable collection of sample impurities; the separated gas is discharged from the exhaust pipe 12 and collected uniformly, waiting for further analysis; after the natural gas sampling is completed, adjust the valve 13 to close the passage of the exhaust pipe 12 and open the passage of the connecting pipe 5; start the electric heating rod 7 and the electric heating sleeve 8. The electric heating rod 7 heats the solid-liquid impurities from the center, and the electric heating sleeve 8 heats from the periphery. The two heat sources effectively improve the heating efficiency, uniformly heating the solid-liquid impurities, turning the liquid into steam and under the action of the pipeline fan 4, passing through the inner separation pipe 2 and the connecting pipe 5, entering the condensation device 6 for condensation and becoming liquid to achieve solid-liquid separation; then unscrew and remove the collection hood 9, take out the solid impurity sample for further analysis; take out the collection container 16 to send the liquid impurity sample for inspection.

Claims

1. A pipeline natural gas sample collection device, comprising an outer separation tube (1), an inner separation tube (2), a housing (3), a pipeline fan (4), a connecting tube (5), a condensing device (6), an electric heating rod (7), and an electric heating jacket (8), characterized in that The outer separation tube (1) is closed at the top, the lower part of the outer separation tube (1) is gradually contracted, the bottom of the outer separation tube (1) is detachably connected to the collecting cover (9) through internal and external thread structures, the collecting cover (9) is a bucket-shaped structure with a larger top and a smaller bottom, an electric heating rod (7) is provided at the center of the bottom of the collecting cover (9), the heating part of the electric heating rod (7) is vertically located at the axis of the collecting cover (9), the outer cover of the collecting cover (9) is provided with an electric heating sleeve (8), an air inlet pipe (10) is provided on the side of the upper part of the outer separation tube (1), an inner separation tube (2) is provided at the axis of the outer separation tube (1), the upper end of the inner separation tube (2) passes through to the outside of the outer separation tube (1), a first spiral blade (11) is provided on the upper part of the outer tube body of the inner separation tube (2), and the first spiral blade (11) is located inside the outer separation tube (1), the upper end of the inner separation tube (2) is connected to the connecting pipe (5) through the pipeline fan (4), and the connecting pipe ( 5) is connected to the air inlet of the condensing device (6), an exhaust pipe (12) is provided on the side surface of the upper end of the inner separation pipe (2), and a valve (13) is provided on the pipe body of the inner separation pipe (2) between the exhaust pipe (12) and the pipeline fan (4), the outer shell (3) is fixedly arranged on the upper part outside the outer separation pipe (1), and the upper part of the outer separation pipe (1), the pipeline fan (4), the connecting pipe (5), and the condensing device (6) are located inside the outer shell (3), and the air inlet pipe (10) and the exhaust pipe (12) both pass through the outer shell (3), and a second spiral blade (14) is provided on the lower part of the inner separation pipe (2), and a plurality of curved openings (15) that gradually shrink from the inside to the outside are opened on the pipe wall of the inner separation pipe (2) above the second spiral blade (14), and the plurality of curved openings (15) are arranged in a circular array with the axis of the inner separation pipe (2) as the center, and the curved openings (15) are inclined in the direction of rotation of the airflow of the outer separation pipe (1).

2. The pipeline natural gas sample collection device according to claim 1, characterized in that The lower end of the inner separation tube (2) is open in a trumpet shape.

3. The pipeline natural gas sample collection device according to claim 1, characterized in that The liquid outlet of the condensing device (6) is connected to a collecting container (16), a partition (17) is provided in the middle of the outer shell (3), the collecting container (16) is placed on the partition (17), and a compartment door is provided on the side of the outer shell (3) corresponding to the collecting container (16).

4. The pipeline natural gas sample collection device according to claim 1, characterized in that The valve (13) is a manual valve, and a compartment door is provided on the side of the housing (3) corresponding to the valve (13).

5. The pipeline natural gas sample collection device according to claim 1, characterized in that The valve (13) is a solenoid valve.

Images