CN211954890U - Automatic sampling device of gas phase tracer natural gas sample - Google Patents
Automatic sampling device of gas phase tracer natural gas sample Download PDFInfo
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- CN211954890U CN211954890U CN202020416155.4U CN202020416155U CN211954890U CN 211954890 U CN211954890 U CN 211954890U CN 202020416155 U CN202020416155 U CN 202020416155U CN 211954890 U CN211954890 U CN 211954890U
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Abstract
The utility model discloses an automatic sampling device of gaseous phase tracer natural gas sample, its structure includes: the device comprises a gas sample shunting unit, a vacuum pump, a tail gas purifier, a hydrogen sulfide sensor, an audible and visual alarm and a controller; the gas sample shunting unit comprises a main pipeline, one end of the main pipeline is provided with a gas inlet and is used for being connected with a natural gas sampling port, a first electromagnetic valve, a pressure sensor, at least 6 branch pipelines communicated with the main pipeline and a second electromagnetic valve are sequentially arranged on the main pipeline along the direction far away from the gas inlet, the tail end of the main pipeline is connected with a gas inlet of a vacuum pump, and a gas outlet of the vacuum pump is connected with a tail gas purifier; and an electromagnetic valve is arranged on each branch pipeline, the tail end of the branch pipeline closest to the electromagnetic valve II is connected with a tail gas purifier, and the tail end of each other branch pipeline is connected with a sampling steel cylinder. The sampling process of the sampling device is safe, and the full automation of emptying, vacuumizing and continuous sampling in an unmanned state at regular time can be realized.
Description
Technical Field
The utility model relates to an oil gas field development technical field, especially an automatic sampling device of trace chemical gas phase tracer natural gas sample.
Background
The trace chemical gas tracer monitoring technology is one dynamic monitoring method for oil and gas field development. In order to accurately obtain the back-flow test gas information and the production dynamic information of the fracturing operation well, the gas well needs to be sampled and tested regularly. Due to the fact that the sampling data volume is large and the time span is long, personnel need to be arranged on site to stay and sample for a long time. In addition, part of gas wells contain highly toxic hydrogen sulfide gas, and frequent sampling operation also increases the risk of hydrogen sulfide poisoning. Thirdly, some key data need to be measured and compared for many times, and how to obtain parallel samples simultaneously is also very critical. Therefore, the automatic sampling device for the gas phase tracer natural gas has very important practical significance for improving sampling efficiency and sampling safety.
Disclosure of Invention
The utility model aims at providing a gas phase tracer natural gas sample automatic sampling device of efficient, the sample safety of taking a sample.
The utility model provides an automatic sampling device of gaseous phase tracer natural gas sample, its structure includes: the device comprises a gas sample shunting unit, a vacuum pump, a tail gas purifier, a hydrogen sulfide sensor, an audible and visual alarm and a controller. The gas sample shunting unit comprises a main pipeline, wherein one end of the main pipeline is provided with a gas inlet of natural gas and is connected with a natural gas sampling port. The main pipeline is sequentially provided with a first electromagnetic valve, a pressure sensor, at least 6 branch pipelines communicated with the main pipeline and a second electromagnetic valve along the direction far away from the air inlet. The tail end of the main pipeline is connected with an air inlet of a vacuum pump through a high-pressure hose. The gas outlet of the vacuum pump is connected with a tail gas purifier. And an electromagnetic valve is arranged on each branch pipeline, the tail end of the branch pipeline closest to the electromagnetic valve II is connected with a tail gas purifier, and the tail end of each other branch pipeline is connected with a sampling steel cylinder. The exhaust port of the tail gas purifier is provided with a hydrogen sulfide sensor, and the upper part of the tail gas purifier is provided with an audible and visual alarm. And the controller is respectively connected with the pressure sensor, the vacuum pump, the hydrogen sulfide sensor, the audible and visual alarm and all the electromagnetic valves. The controller is a computer, and the computer is respectively connected with the pressure sensor, the vacuum pump, the hydrogen sulfide sensor, the audible and visual alarm and all the electromagnetic valves through a data acquisition card.
Preferably, the branch lines are evenly distributed on the main line at equal intervals.
It is further preferred that there are 12 branch lines equally spaced on either side of the main line, 6 on each side. The gas outlet of the vacuum pump is connected with a tail gas purifier through a gas pipe, a gas hole is formed in the middle of the gas pipe, the gas hole is connected with the tail end of a branch pipeline which is closest to the electromagnetic valve II, and the tail ends of other 11 branch pipelines are respectively connected with a sampling steel cylinder.
Preferably, the tail gas purifier is a molecular sieve tail gas treater for removing hydrogen sulfide gas. The tail gas purifier is a polyethylene plastic barrel filled with a 5A molecular sieve adsorbent, the top of the plastic barrel is sealed by a cover, the bottom of the plastic barrel is provided with a gas inlet, the top of the plastic barrel is provided with a gas outlet, a hydrogen sulfide sensor is arranged on the gas outlet, tail gas is injected from the gas inlet at the bottom of the molecular sieve processor, and the tail gas is discharged from the gas outlet at the top after the hydrogen sulfide is adsorbed by the molecular sieve.
Compared with the prior art, the utility model discloses an useful part lies in:
the utility model discloses a natural gas sampling device's sampling process safety can realize regularly evacuation, continuous sampling full automatization under unmanned state and go on.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
Fig. 1, the utility model provides an automatic sampling device of gaseous phase tracer natural gas sample's schematic structure diagram.
Fig. 2 is a schematic structural diagram of the tail gas processor.
Reference numbers in the figures:
the device comprises a first electromagnetic valve 1, a pressure sensor 2, electromagnetic valves 3-14, a second electromagnetic valve 15, a vacuum pump 16, an exhaust purifier 17, a hydrogen sulfide sensor 18, a controller 19, an audible and visual alarm 20, an air inlet 21, a molecular sieve adsorbent 22, a polyethylene plastic barrel 23, an air inlet 24 and an air outlet 25.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.
As shown in figure 1, the utility model provides an automatic sampling device of gaseous phase tracer natural gas sample, its structure includes: a gas sample shunting unit, a vacuum pump 16, an exhaust purifier 17, a hydrogen sulfide sensor 18, an audible and visual alarm 20 and a controller 19. The gas sample shunting unit comprises a main pipeline, wherein one end of the main pipeline is provided with a gas inlet 21 of natural gas and is connected with a natural gas sampling port. The main pipeline is sequentially provided with a first electromagnetic valve 1, a pressure sensor 2, 12 branch pipelines communicated with the main pipeline and a second electromagnetic valve 15 along the direction far away from the air inlet. The end of the main pipeline is connected with the air inlet of the vacuum pump 16 through a high-pressure hose. The gas outlet of the vacuum pump is connected with a tail gas purifier 17. The 12 branch pipelines are distributed on two sides of the main pipeline at equal intervals, and 6 branch pipelines are arranged on each side. Each branch pipeline is respectively provided with an electromagnetic valve (an electromagnetic valve 3, an electromagnetic valve 4, an electromagnetic valve 5, an electromagnetic valve 6, an electromagnetic valve 7, an electromagnetic valve 8, an electromagnetic valve 9, an electromagnetic valve 10, an electromagnetic valve 11, an electromagnetic valve 12, an electromagnetic valve 13 and an electromagnetic valve 14). The tail gas purifier 17 is connected to the tail gas end of the branch pipeline closest to the second electromagnetic valve 15 and is mainly used for emptying before sampling so as to eliminate impurities such as water in a sampling port, and the air exhaust body is discharged after being processed by the tail gas purifier. The air outlet of the vacuum pump is connected with a tail gas purifier through an air pipe, the middle part of the air pipe is provided with an air hole, the air hole is connected with the tail end of a branch pipeline which is closest to the second 15 electromagnetic valves, and the tail ends of the other 11 branch pipelines are respectively connected with a sampling steel cylinder (not shown). Before sampling, the sampling pipeline is vacuumized to be used as supplement of evacuation, interference caused by residual gas in the pipeline after last sampling is avoided, and gas extracted by the vacuum pump is discharged after being processed by the tail gas purifier 17.
And a hydrogen sulfide sensor 18 is arranged at an exhaust port of the tail gas purifier 17, and an audible and visual alarm 20 is arranged above the tail gas purifier. The controller 19 is a computer, and the computer is respectively connected with the pressure sensor 2, the vacuum pump 16, the hydrogen sulfide sensor 18, the audible and visual alarm 20 and all the electromagnetic valves (total 14 electromagnetic valves) through a data acquisition card. The tail gas purifier is a molecular sieve tail gas processor and is used for removing hydrogen sulfide gas. As shown in fig. 2, the tail gas purifier 17 is a polyethylene plastic barrel 23 filled with a 5A molecular sieve adsorbent 22, the top of the plastic barrel is sealed by a cover, the bottom of the plastic barrel is provided with a gas inlet 24, the top is provided with a gas outlet 25, the gas outlet is provided with a hydrogen sulfide sensor 18, and the tail gas is injected from the gas inlet 24 at the bottom of the molecular sieve processor, and is discharged from the gas outlet 25 at the top after being adsorbed by the molecular sieve. When the controller 19 receives the information that the hydrogen sulfide sensor 18 feeds back that the tail gas contains hydrogen sulfide, the audible and visual alarm 20 is controlled to give an alarm to prompt the failure of the tail gas purifier and prompt a worker to replace the 5A molecular sieve in the tail gas purifier.
The automatic sampling device comprises the following operation steps:
(1) the tail ends of the 11 branch pipelines are connected with 11 sampling steel cylinders, an air inlet 21 of the main pipeline is connected to a sampling port of natural gas, all electromagnetic valves are in a closed state, the controller 19 monitors the pressure in the main pipeline through the pressure sensor 2, and the hydrogen sulfide content in the tail gas is monitored through the hydrogen sulfide sensor 18.
(2) The controller 19 performs sampling according to a preset sampling time: when the sampling time is up, the controller 19 sequentially controls the first electromagnetic valve 1 to be opened, the electromagnetic valve 8 is closed after the branch pipeline is opened and the branch pipeline is evacuated for 30s, the controller 19 controls the electromagnetic valve 15 to be opened, the vacuum pump 16 is opened for vacuumizing, and when the controller 19 monitors that the pressure in the pipeline is less than 0.005MPa through the pressure sensor 2, the electromagnetic valve 15 and the vacuum pump 16 are sequentially closed.
(3) The controller 19 controls the electromagnetic valve 3 to open the gas path, so that the gas sample enters the corresponding sampling steel cylinder, and when the controller 19 monitors that the pressure in the pipeline is greater than 2MPa, the electromagnetic valve 3 and the electromagnetic valve one 1 are closed in sequence, and 1-time sampling is completed.
(4) And (3) repeating the steps (2) and (3) when another sampling time is reached, and sequentially finishing sampling of the remaining 10 sampling steel cylinders.
(5) After all samples are collected, the sampling personnel come to the sampling site to close the sampling steel cylinder valves one by one, take down the sampling steel cylinder and finish the sampling work.
The utility model discloses an automatic sampling device of natural gas's sampling process safety can realize regularly evacuation, continuous sampling full automatization under unmanned state and go on.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiments, and although the present invention has been disclosed with the preferred embodiments, it is not limited to the present invention, and any skilled person in the art can make some modifications or equivalent embodiments without departing from the scope of the present invention, but all the technical matters of the present invention are within the scope of the present invention.
Claims (8)
1. An automatic sampling device of a gas phase tracer natural gas sample is characterized by comprising: the device comprises a gas sample shunting unit, a vacuum pump, a tail gas purifier, a hydrogen sulfide sensor, an audible and visual alarm and a controller; the gas sample shunting unit comprises a main pipeline, wherein one end of the main pipeline is provided with a gas inlet and is used for being connected with a natural gas sampling port, a first electromagnetic valve, a pressure sensor, at least 6 branch pipelines communicated with the main pipeline and a second electromagnetic valve are sequentially arranged on the main pipeline along the direction far away from the gas inlet, the tail end of the main pipeline is connected with a gas inlet of a vacuum pump, and a gas outlet of the vacuum pump is connected with a tail gas purifier; an electromagnetic valve is installed on each branch pipeline, the tail end of the branch pipeline closest to the electromagnetic valve II is connected with a tail gas purifier, and the tail ends of the rest branch pipelines are used for being connected with sampling steel cylinders; a hydrogen sulfide sensor is arranged at an exhaust port of the tail gas purifier, and an audible and visual alarm is arranged above the tail gas purifier; and the controller is respectively connected with the pressure sensor, the vacuum pump, the hydrogen sulfide sensor, the audible and visual alarm and all the electromagnetic valves.
2. The automatic sampling device for natural gas samples as gas phase tracers of claim 1, wherein the branch lines are evenly distributed on the main line at equal intervals.
3. The automatic sampling device for natural gas samples as gas phase tracers of claim 2, wherein said branch lines are 12, equally spaced on both sides of the main line, 6 on each side.
4. The automatic sampling device for the gas phase tracer natural gas sample as claimed in claim 3, wherein the outlet of the vacuum pump is connected with the tail gas purifier through a gas pipe, a gas hole is arranged in the middle of the gas pipe, the gas hole is connected with the end of one branch pipe closest to the second electromagnetic valve, and the ends of the other 11 branch pipes are respectively connected with the sampling steel cylinders.
5. The automatic sampling device for the gas phase tracer natural gas sample as claimed in claim 1, wherein the end of the main pipeline is connected with the air inlet of the vacuum pump through a high-pressure hose.
6. The automatic sampling device for the gas phase tracer natural gas sample as claimed in claim 1, wherein the controller is a computer, and the computer is respectively connected with the pressure sensor, the vacuum pump, the hydrogen sulfide sensor, the audible and visual alarm and all the electromagnetic valves through a data acquisition card.
7. The automatic sampling device for a gas phase tracer natural gas sample as claimed in claim 1, wherein the tail gas purifier is a molecular sieve tail gas processor for removing hydrogen sulfide gas.
8. The automatic sampling device for the gas phase tracer natural gas sample as claimed in claim 1, wherein the tail gas purifier is a polyethylene plastic barrel filled with 5A molecular sieve adsorbent, the top of the plastic barrel is sealed by a cover, the bottom of the plastic barrel is provided with a gas inlet, the top of the plastic barrel is provided with a gas outlet, and the gas outlet is provided with a hydrogen sulfide sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020416155.4U CN211954890U (en) | 2020-03-27 | 2020-03-27 | Automatic sampling device of gas phase tracer natural gas sample |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020416155.4U CN211954890U (en) | 2020-03-27 | 2020-03-27 | Automatic sampling device of gas phase tracer natural gas sample |
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| Publication Number | Publication Date |
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| CN211954890U true CN211954890U (en) | 2020-11-17 |
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| CN202020416155.4U Active CN211954890U (en) | 2020-03-27 | 2020-03-27 | Automatic sampling device of gas phase tracer natural gas sample |
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| CN (1) | CN211954890U (en) |
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- 2020-03-27 CN CN202020416155.4U patent/CN211954890U/en active Active
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