CN109856186A - A kind of gas pipeline hydrocarbon dew point on-line real-time measuremen device - Google Patents
A kind of gas pipeline hydrocarbon dew point on-line real-time measuremen device Download PDFInfo
- Publication number
- CN109856186A CN109856186A CN201910104382.5A CN201910104382A CN109856186A CN 109856186 A CN109856186 A CN 109856186A CN 201910104382 A CN201910104382 A CN 201910104382A CN 109856186 A CN109856186 A CN 109856186A
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- Prior art keywords
- dew point
- valve
- hydrocarbon dew
- gas pipeline
- outlet
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- 229930195733 hydrocarbon Natural products 0.000 title claims abstract description 72
- 239000004215 Carbon black (E152) Substances 0.000 title claims abstract description 70
- 150000002430 hydrocarbons Chemical class 0.000 title claims abstract description 70
- 239000000523 sample Substances 0.000 claims abstract description 60
- 238000005070 sampling Methods 0.000 claims abstract description 20
- 229910001220 stainless steel Inorganic materials 0.000 claims description 17
- 239000010935 stainless steel Substances 0.000 claims description 17
- 210000002445 nipple Anatomy 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 42
- 230000006872 improvement Effects 0.000 description 10
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 10
- 239000003345 natural gas Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 2
- -1 natural gas hydrocarbons Chemical class 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
Landscapes
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a kind of gas pipeline hydrocarbon dew point on-line real-time measuremen devices, comprising: hydrocarbon dew point analyzer is connected to station control system；Sampling probe, its underpart are connected with gas pipeline；Sample air pipe, entrance are connected with the top of sampling probe, and sample tracheae way outlet is connected with hydrocarbon dew point analyzer air inlet, and sample air pipe is equipped with the first shut-off valve, the second shut-off valve, filter and pressure regulator valve；Outlet pipe, entrance are connected with hydrocarbon dew point analyzer gas outlet, and outlet pipe outlet leads to safety zone, and outlet pipe is equipped with second flow control valve, second one-way valve and the 4th shut-off valve；Bypass conduit, entrance are connected with filter, and bypass conduit outlet leads to safety zone, and bypass conduit is equipped with the first check valve and first flow control valve.Beneficial effects of the present invention: realizing the on-line real-time measuremen of gas pipeline hydrocarbon dew point, improves the timeliness and accuracy of the detection of gas pipeline hydrocarbon dew point, it is ensured that the operational safety of gas pipeline and equipment reduces personnel's load.
Description
Technical field
The present invention relates to detection of natural gas technical fields, real-time online in particular to a kind of gas pipeline hydrocarbon dew point
Detection device.
Background technique
In Long-distance Transmission Pipeline transmission process, the variation of temperature and pressure will lead to the variation of natural gas hydrocarbons dew point,
Liquid hydrocarbon will be precipitated when postcritical, cause the corrosion and damage of the equipment such as pipeline, compressor.Therefore, to natural gas hydrocarbons
The real-time monitoring of dew point is particularly important.The hydrocarbon dew point of previous pipe natural gas monitors the interior reality that generally enters the station after pipeline sampling gas
It tests room and carries out offline inspection, for the sampling operation of pressure piping, for the more demanding of people, operational risk can not be kept away
Exempt from, and that there are personnel's loads is larger, process is complicated, takes a long time, the problems such as real-time is inadequate for this method, eventually leads to gas transmission
The accuracy of pipeline trade transaction is not high.
Summary of the invention
To solve the above problems, the purpose of the present invention is to provide a kind of gas pipeline hydrocarbon dew point on-line real-time measuremen dresses
It sets, can fast and automatically, accurately detect the hydrocarbon dew point value of gas pipeline.
The present invention provides a kind of gas pipeline hydrocarbon dew point on-line real-time measuremen devices, comprising:
Hydrocarbon dew point analyzer is connected to station control system；
Sampling probe, its underpart are connected with gas pipeline；
Sample air pipe, entrance are connected with the top of the sampling probe, and the outlet of the sample air pipe and the hydrocarbon reveal
The air inlet of point analysis instrument is connected, and the first shut-off valve, the second shut-off valve, filter and tune are disposed on the sample air pipe
Pressure valve；
Outlet pipe, entrance are connected with the gas outlet of the hydrocarbon dew point analyzer, and the outlet of the outlet pipe leads to
Safety zone is disposed with second flow control valve, second one-way valve and the 4th shut-off valve on the outlet pipe；
Bypass conduit, entrance are connected with the filter, and the outlet of the bypass conduit leads to safety zone, the bypass
The first check valve and first flow control valve are disposed on pipeline.
As further improvement of the invention, the filter is y-type filter, the first port of the filter and institute
State the second shut-off valve be connected, the second port of the filter is connected with the pressure regulator valve, the third port of the filter and
The entrance of the bypass conduit is connected.
Shunt valve as further improvement of the invention, between first check valve and the first flow control valve
Road is provided with threeway, and the first end of the threeway is connected with first check valve, the second end of the threeway and the stream
Control valve is connected, and the third end of the threeway connects bypass branch.
As further improvement of the invention, it is provided with third shut-off valve in the bypass branch, the bypass branch
Outlet leads to safety zone.
As further improvement of the invention, the sampling probe is connected by weld nipple gas pipeline.
As further improvement of the invention, pressure is provided on the sample air pipe between the filter and the pressure regulator valve
Power table.
It further include explosion-proof wiring box, the hydrocarbon dew point analyzer passes through the first cable as further improvement of the invention
It is connected to the explosion-proof wiring box.
As further improvement of the invention, the explosion-proof wiring box is connected to station control system by the second cable.
As further improvement of the invention, the sample air pipe, the outlet pipe and the bypass conduit are all made of
Stainless steel tube.
As further improvement of the invention, electric tracing is arranged in the stainless steel tube.
The invention has the benefit that
The on-line real-time measuremen of gas pipeline hydrocarbon dew point can be achieved, improve the timeliness and standard of the detection of gas pipeline hydrocarbon dew point
True property, it is ensured that the operational safety of gas pipeline and equipment reduces personnel's load.
Detailed description of the invention
Fig. 1 is a kind of structural representation of gas pipeline hydrocarbon dew point on-line real-time measuremen device described in the embodiment of the present invention
Figure.
In figure,
1, sampling probe；2, the first shut-off valve；3, stainless steel tube；4, the second shut-off valve；5, filter；6, pressure gauge；7,
First check valve；8, threeway；9, first flow control valve；10, third shut-off valve；11, pressure regulator valve；12, hydrocarbon dew point analyzer；
13, second flow control valve；14, second one-way valve；15, the 4th shut-off valve；16, the first cable；17, the second cable；18, explosion-proof
Junction box.
Specific embodiment
The present invention is described in further detail below by specific embodiment and in conjunction with attached drawing.
A kind of gas pipeline hydrocarbon dew point on-line real-time measuremen device of the embodiment of the present invention, for existing natural gas line without
Hydrocarbon dew point analyzer is applied to gas pipeline, realizes gas pipeline hydrocarbon dew point value by the problem of method on-line real-time measuremen hydrocarbon dew point
On-line real-time measuremen.As shown in Figure 1, gas pipeline hydrocarbon dew point on-line real-time measuremen device of the invention includes: hydrocarbon dew point point
Analyzer 12, sampling probe 1, sample air pipe, outlet pipe and bypass conduit.
The lower part of sampling probe 1 is connected and is connected to gas pipeline by weld nipple 1, completes the sample from gas pipeline
Gas sampling.
The entrance of sample air pipe is connected with the top of sampling probe 1, the outlet of sample air pipe and hydrocarbon dew point analyzer into
Port is connected, and the first shut-off valve 2, the second shut-off valve 4, filter 5 and pressure regulator valve 11 are disposed on sample air pipe.Sample tracheae
It filters for sample gas will to be sampled and is delivered to hydrocarbon dew point analyzer 12 in road.The setting of first shut-off valve 2, for being visited from control sampling
First 1 is sampled from gas pipeline.The setting of second shut-off valve 4, the sample gas for taking out sampling probe 1 unidirectionally flow into sample
Air pipe is filtered.The sample gas of taking-up is filtered impurities removal, it is ensured that into hydrocarbon dew point analyzer 12 by the setting of filter 5
Sample gas is pure.Preferably, pressure regulator valve 11 is with having heaters.On the one hand the setting of pressure regulator valve 11 ensures to enter hydrocarbon dew point analyzer
The pressure of 12 sample gas within the allowable range, is on the other hand also ensured that and is sent after the sample gas in pipeline is sufficiently heated to proper temperature
Enter and is analyzed in hydrocarbon dew point analyzer 12.
The entrance of outlet pipe is connected with the gas outlet of hydrocarbon dew point analyzer 12, and the outlet of outlet pipe leads to safety zone,
Second flow control valve 13, second one-way valve 14 and the 4th shut-off valve 15 are disposed on outlet pipe.Outlet pipe is used for
After detection, the remaining sample gas exported to hydrocarbon dew point analyzer 12 is emitted into safety zone.Second flow control valve 13 is set
It sets, is adjusted for the flow to outlet pipe, it is ensured that the flow of pipeline is in the allowed band of hydrocarbon dew point analyzer 12.The
Two check valves 14 and the 4th shut-off valve 15, for unidirectionally flowing into outlet pipe the sample gas after hydrocarbon dew point analyzer 12, side by side
It puts to safety zone.
The entrance of bypass conduit is connected with filter 5, and the outlet of bypass conduit leads to safety zone, successively sets in bypass conduit
It is equipped with the first check valve 7 and first flow control valve 9.Bypass conduit is used for after detection, to the remnants in sample air pipe
Sample gas is emitted into safety zone.The setting of first flow control valve 9, it is ensured that the flow in bypass conduit is within the allowable range.First
The setting of check valve 7 for unidirectionally flowing into the remaining sample gas after hydrocarbon dew point analyzer 12 in sample air pipe, and is emitted into safety
Area.
Hydrocarbon dew point analyzer 12 is commercially available industrial explosion-proof hydrocarbon dew point analyzer, and analysis precision is higher, needs to be connected to station control
System, control system of standing are PLC or DCS etc..
Further, filter 5 is y-type filter, for being filtered removal of impurities, the first port of filter 5 to sample gas
It is connected with the second shut-off valve 4, the second port of filter 5 is connected with pressure regulator valve 11, the third port and bypass conduit of filter 5
Entrance be connected.
Further, threeway 8, threeway are provided in the bypass conduit between the first check valve 7 and first flow control valve 9
8 first end is connected with the first check valve 7, and the second end of threeway 8 is connected with flow control valve 9, and the third end of threeway 8 connects other
Road branch.Third shut-off valve 10 is provided in bypass branch, the outlet of bypass branch leads to safety zone.Third shut-off valve is set
10, one can be prevented from adverse current, second is that can the easy access when first flow control valve 9 breaks down, third is that can be with the
Flow control valve 9 opens the discharge for carrying out remaining sample gas together.The knot of first flow control valve 9 and second flow control valve 13
It closes and uses, it is ensured that the flow into hydrocarbon dew point analyzer 12 is within the scope of equipment requirement.
Further, pressure gauge 6, real-time monitoring pressure regulation are provided on the sample air pipe between filter 5 and pressure regulator valve 11
Pressure value of the valve 11 during pressure regulation, it is ensured that the pressure on pipeline is in the normal range.
It further, further include explosion-proof wiring box 18, hydrocarbon dew point analyzer 12 is connected to explosion-proof wiring by the first cable 16
Case 18.Explosion-proof wiring box 18 is connected to station control system by the second cable 17.
Further, sample air pipe, outlet pipe and bypass conduit are all made of stainless steel tube 3.In view of outdoor environment, no
Steel pipe 3 become rusty according to the setting electric heating companion such as environment temperature.
Specific: the top of sampling probe 1 is connected by stainless steel tube 3 with one end of the first shut-off valve 2, the first shut-off valve
2 other end is connected by stainless steel tube 3 with one end of the second shut-off valve 4, and the other end of the second shut-off valve 4 passes through stainless steel tube
3 are connected with the first end of filter 5, and the second end of filter 5 and the third end of filter 5 are all connected with stainless steel tube 3, second end
Pressure gauge 6 and pressure regulator valve 11,3 last time of the stainless steel tube setting first of third end connection are set gradually on the stainless steel tube 3 of connection
Check valve 7, threeway 8, first flow control valve 9.The outlet of hydrocarbon dew point analyzer 12 equally connects stainless steel tube 3, the stainless steel
Second flow control valve 13, second one-way valve 14 and the 4th shut-off valve 15 are set gradually on pipe 3.First check valve 7 and first-class
Threeway 8 is set between control valve 9.One end of first check valve 7 is connected with the third end of filter 5, the first check valve 7 it is another
One end is connected with the first end of threeway 8.The second end of threeway 8 is connected with one end of first flow control valve 9, first flow control
The other end of valve 9 leads to safety zone by stainless steel tube 3.The third end of threeway 8 passes through stainless steel tube 3 and third shut-off valve 10
One end is connected, and 10 other end of third shut-off valve leads to safety zone by stainless steel tube 3.One end of second flow control valve 13 with
The outlet of hydrocarbon dew point analyzer 12 is connected, and the other end of second flow control valve 13 is connected with one end of second one-way valve 14, the
The other end of two check valves 14 is connected with one end of the 4th shut-off valve 15, and the other end of the 4th shut-off valve 15 passes through stainless steel tube 3
Towards safety zone.Explosion-proof wiring box 18 is connected by the first cable 16 with hydrocarbon dew point analyzer 12, and explosion-proof wiring box 18 passes through the
Two cables 17 are connected with station control system.
The on-line real-time measuremen principle of gas pipeline hydrocarbon dew point on-line real-time measuremen device of the invention are as follows: sampling probe from
Representative sample gas is obtained in gas pipeline full of high-pressure natural gas, using devices such as filtering, pressure regulation in pipeline, is obtained
The sample gas injection hydrocarbon dew point analyzer that condition must be met, then detects sample gas by hydrocarbon dew point analyzer, exports hydrocarbon dew point
Value is arrived at a station control system.
Specifically, the following steps are included:
Step 1, all valves in gas pipeline hydrocarbon dew point on-line real-time measuremen device are closed.
Step 2, start hydrocarbon dew point analyzer 12, and the output result type of hydrocarbon dew point analyzer 12 is set.
Step 3, the exit pressure levels of pressure regulator valve 11 on sample air pipe are set.During 11 pressure regulation of pressure regulator valve, pass through
The pressure value of 6 real-time monitoring pressure regulator valve 11 of pressure gauge on sample air pipe.
Step 4, the first shut-off valve 2 on sample air pipe is opened.
Step 5, second flow control valve 13, second one-way valve 14 and the 4th shut-off valve on outlet pipe are successively opened
15。
Step 6, the second shut-off valve 4 on sample air pipe is slowly opened, the sample gas that sampling probe 1 takes out passes through sample air pipe
On 5 filtering and impurity removing of filter after enter hydrocarbon dew point analyzer 12.
Step 7, adjust second flow control valve 13 flow value, by flow control hydrocarbon dew point analyzer 12 requirement model
In enclosing.
Step 8, the first flow control valve 9 in bypass conduit is opened, and adjusts the flow value of first flow control valve 9,
By 2~3 times that flow control is 13 place piping flow of second flow control valve.
Step 9, after stability of flow 2 minutes, hydrocarbon dew point analyzer 12 starts to work normally, and will test result and is uploaded to station control
System.The testing result of hydrocarbon dew point analyzer 12 is sent into explosion-proof wiring box 18 by the first cable 16, and explosion-proof wiring box 18 will be examined
It surveys result and station control system is uploaded to by the second cable 17.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of gas pipeline hydrocarbon dew point on-line real-time measuremen device characterized by comprising
Hydrocarbon dew point analyzer (12) is connected to station control system；
Sampling probe (1), its underpart is connected with gas pipeline；
Sample air pipe, entrance are connected with the top of the sampling probe (1), the outlet of the sample air pipe and the hydrocarbon dew point
The air inlet of analyzer (12) is connected, and the first shut-off valve (2), the second shut-off valve (4), mistake are disposed on the sample air pipe
Filter (5) and pressure regulator valve (11)；
Outlet pipe, entrance are connected with the gas outlet of the hydrocarbon dew point analyzer (12), and the outlet of the outlet pipe leads to
Safety zone is disposed with second flow control valve (13), second one-way valve (14) and the 4th shut-off valve on the outlet pipe
(15)；
Bypass conduit, entrance are connected with the filter (5), and the outlet of the bypass conduit leads to safety zone, the bypass
The first check valve (7) and first flow control valve (9) are disposed on pipeline.
2. gas pipeline hydrocarbon dew point on-line real-time measuremen device according to claim 1, which is characterized in that the filter
It (5) is y-type filter, the first port of the filter (5) is connected with second shut-off valve (4), the filter (5)
Second port is connected with the pressure regulator valve (11), and the third port of the filter (5) is connected with the entrance of the bypass conduit.
3. gas pipeline hydrocarbon dew point on-line real-time measuremen device according to claim 1, which is characterized in that described first is single
It is provided in the bypass conduit between valve (7) and the first flow control valve (9) threeway (8), the first of the threeway (8)
End is connected with first check valve (7), and the second end of the threeway (8) is connected with the flow control valve (9), the threeway
(8) third end connects bypass branch.
4. gas pipeline hydrocarbon dew point on-line real-time measuremen device according to claim 3, which is characterized in that the bypass branch
Road is provided with third shut-off valve (10), and the outlet of the bypass branch leads to safety zone.
5. gas pipeline hydrocarbon dew point on-line real-time measuremen device according to claim 1, which is characterized in that the sampling is visited
Head (1) is connected by weld nipple gas pipeline.
6. gas pipeline hydrocarbon dew point on-line real-time measuremen device according to claim 1, which is characterized in that the filter
(5) pressure gauge (6) are provided on the sample air pipe between the pressure regulator valve (11).
7. gas pipeline hydrocarbon dew point on-line real-time measuremen device according to claim 1, which is characterized in that further include explosion-proof
Junction box (18), the hydrocarbon dew point analyzer (12) are connected to the explosion-proof wiring box (18) by the first cable (16).
8. gas pipeline hydrocarbon dew point on-line real-time measuremen device according to claim 7, which is characterized in that described explosion-proof to connect
Line case (18) is connected to station control system by the second cable (17).
9. gas pipeline hydrocarbon dew point on-line real-time measuremen device according to claim 1, which is characterized in that the sample tracheae
Road, the outlet pipe and the bypass conduit are all made of stainless steel tube (3).
10. gas pipeline hydrocarbon dew point on-line real-time measuremen device according to claim 1, which is characterized in that described stainless
Electric tracing is arranged in steel pipe (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910104382.5A CN109856186A (en) | 2019-02-01 | 2019-02-01 | A kind of gas pipeline hydrocarbon dew point on-line real-time measuremen device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910104382.5A CN109856186A (en) | 2019-02-01 | 2019-02-01 | A kind of gas pipeline hydrocarbon dew point on-line real-time measuremen device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109856186A true CN109856186A (en) | 2019-06-07 |
Family
ID=66897571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910104382.5A Pending CN109856186A (en) | 2019-02-01 | 2019-02-01 | A kind of gas pipeline hydrocarbon dew point on-line real-time measuremen device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109856186A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113790893A (en) * | 2021-07-19 | 2021-12-14 | 江铃汽车股份有限公司 | Rapid checking and verifying system and checking and verifying method for discharge equipment |
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| CN113790893A (en) * | 2021-07-19 | 2021-12-14 | 江铃汽车股份有限公司 | Rapid checking and verifying system and checking and verifying method for discharge equipment |
| CN113790893B (en) * | 2021-07-19 | 2023-10-20 | 江铃汽车股份有限公司 | Quick check and verification system and check and verification method for discharge equipment |
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