CN106838618B - Online automatic waste fitting discharging of gas transmission pipeline station yard - Google Patents
Online automatic waste fitting discharging of gas transmission pipeline station yard Download PDFInfo
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- CN106838618B CN106838618B CN201710197594.3A CN201710197594A CN106838618B CN 106838618 B CN106838618 B CN 106838618B CN 201710197594 A CN201710197594 A CN 201710197594A CN 106838618 B CN106838618 B CN 106838618B
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- liquid level
- valve
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- safety shut
- level transmitter
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/08—Pipe-line systems for liquids or viscous products
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F1/00—Methods, systems, or installations for draining-off sewage or storm water
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- Health & Medical Sciences (AREA)
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- Water Supply & Treatment (AREA)
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- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Control Of Non-Electrical Variables (AREA)
Abstract
The invention discloses an online automatic blowdown device for a gas transmission pipeline station, which comprises: the bottom of the filter is connected with a liquid collecting bag, and two liquid level transmitters are arranged on the liquid collecting bag; one end of the sewage discharge pipeline is connected with the liquid collecting bag and is provided with a first safety cut-off valve, a first process ball valve, a liquid level regulating valve, a second process ball valve, a pressure transmitter and a second safety cut-off valve; the sewage collection tank is connected with the other end of the sewage pipeline and is provided with a third liquid level transmitter; and the instrument junction box is connected with the three liquid level transmitters, the two safety shut-off valves, the liquid level regulating valve and the pressure transmitter. The invention has the beneficial effects that: the safety of station operation is ensured, the operation risk is reduced, energy conservation and emission reduction are facilitated, and the station can be monitored through the SCADA system.
Description
Technical Field
The invention relates to the technical field of sewage disposal systems, pipeline systems and automatic control, in particular to an online automatic sewage disposal device for a gas pipeline station.
Background
For a sewage system in a gas transmission pipeline station, a traditional device is that a ball valve and a sewage valve are arranged on a sewage branch, and the device can only realize off-line manual sewage drainage, namely when a plurality of branch devices do not operate simultaneously (when a standby branch exists), firstly, the standby branch is opened, an upstream ball valve and a downstream ball valve which need to drain the sewage branch are closed, then, an emptying valve is opened, natural gas pressure is emptied to be below safe operation pressure, then, the emptying valve is closed, and finally, the ball valve and the sewage valve are opened for sewage drainage.
The disadvantages of this off-line waste fitting are:
1. the equipment on the current branch can be drained only after the standby branch is started;
2. the discharge pressure cannot be controlled, so that the downstream equipment is easily damaged, and even operators are injured;
3. the sewage discharge automation degree is low, the manual sewage discharge operation steps are complex, and the workload and the misoperation probability of operators are increased.
Disclosure of Invention
In order to solve the problems, the invention aims to provide an online automatic blowdown device for a gas pipeline station, which ensures the safety of station operation, reduces operation risks, is beneficial to energy conservation and emission reduction, and can be monitored by an SCADA system.
The invention provides an online automatic blowdown device for a gas transmission pipeline station, which comprises:
the bottom of the filter is connected with a liquid collecting bag, and a first liquid level transmitter and a second liquid level transmitter are arranged on the liquid collecting bag;
one end of the sewage discharge pipeline is connected with the liquid collecting bag, a first process ball valve is arranged on the sewage discharge pipeline, a first safety cut-off valve is arranged at the upstream of the first process ball valve, a liquid level regulating valve is arranged at the downstream of the first process ball valve, a second process ball valve is arranged at the downstream of the liquid level regulating valve, a second safety cut-off valve is arranged at the downstream of the second process ball valve, and a pressure transmitter is arranged on the sewage discharge pipeline between the second process ball valve and the second safety cut-off valve;
the blowdown collection tank is connected with the other end of the blowdown pipeline, and a third liquid level transmitter is arranged on the blowdown collection tank;
instrument junction box, its with first liquid level transmitter second liquid level transmitter first safety cut-off valve the liquid level control valve pressure transmitter second safety cut-off valve with third liquid level transmitter connects, first liquid level transmitter inserts through first instrument cable instrument junction box, second liquid level transmitter inserts through second instrument cable instrument junction box, first safety cut-off valve inserts through third instrument cable instrument junction box, liquid level control valve inserts through fourth instrument cable instrument junction box, pressure transmitter inserts through fifth instrument cable instrument junction box, second safety cut-off valve inserts through sixth instrument cable instrument junction box, third liquid level transmitter inserts through seventh instrument cable instrument junction box.
As a further improvement of the invention, the first liquid level transmitter and the second liquid level transmitter are both connected with the liquid collection bag through flanges on the side surfaces of the liquid level transmitters.
As a further improvement of the invention, the first liquid level transmitter and the second liquid level transmitter are both magnetostrictive liquid level transmitters.
As a further improvement of the invention, the first liquid level transmitter is connected with the liquid level regulating valve, the second liquid level transmitter is connected with the first safety cut-off valve, and the third liquid level transmitter and the pressure transmitter are connected with the second safety cut-off valve.
As a further improvement of the invention, the installation distance between the liquid level regulating valve and the first process ball valve is not less than 600mm.
As a further improvement of the invention, the liquid level regulating valve is an axial flow type liquid level regulating valve.
As a further improvement of the invention, the first process ball valve and the second process ball valve are both truncated ball valves.
As a further improvement of the invention, the liquid level regulating valve is connected with the first actuator.
As a further development of the invention, the first safety shut-off valve is connected to a second actuator.
As a further development of the invention, the second safety shut-off valve is connected to a third actuator.
The beneficial effects of the invention are as follows:
the safety of station operation is ensured, the operation risk is reduced, energy conservation and emission reduction are facilitated, and the station can be monitored through the SCADA system.
Drawings
Fig. 1 is a schematic structural diagram of an online automatic blowdown apparatus for a gas pipeline station according to an embodiment of the present invention.
In the figure, the position of the first and second end faces,
1. a filter; 2. a first level transmitter; 3. a second liquid level transmitter; 4. a third level transmitter; 5. a waste line; 6. a first safety shut-off valve; 7. a first process ball valve; 8. a liquid level regulating valve; 9. a second process ball valve; 10. a second safety shut-off valve; 11. a pressure transmitter; 12. a sewage draining and collecting tank; 13. an instrument junction box; 14. collecting liquid; 15. a first instrument cable; 16. a second instrument cable; 17. a third instrument cable; 18. a fourth instrument cable; 19. a fifth instrument cable; 20. a sixth instrument cable; 21. and a seventh instrument cable.
Detailed Description
The present invention will be described in further detail below with reference to specific embodiments and with reference to the attached drawings.
As shown in fig. 1, an on-line automatic sewage draining device for a gas pipeline station according to an embodiment of the present invention includes: the device comprises a filter 1, a sewage pipeline 5, a sewage collection tank 12 and an instrument junction box 13.
The bottom of the filter 1 is connected with a liquid collecting bag 14, and a first liquid level transmitter 2 and a second liquid level transmitter 3 are arranged on the liquid collecting bag 14. The first liquid level transmitter 2 and the second liquid level transmitter 3 are both connected with the liquid collecting bag 14 through flanges on the side surfaces of the liquid level transmitters.
5 one end of sewage pipes is connected with a liquid collecting bag 14, a first process ball valve 7 is arranged on the sewage pipes 5, a first safety shut-off valve 6 is arranged at the upstream of the first process ball valve 7, a liquid level regulating valve 8 is arranged at the downstream of the first process ball valve 7, a second process ball valve 9 is arranged at the downstream of the liquid level regulating valve 8, a second safety shut-off valve 10 is arranged at the downstream of the second process ball valve 9, and a pressure transmitter 11 is arranged on the sewage pipes 5 between the second process ball valve 9 and the second safety shut-off valve 10.
The other end of the sewage discharge gathering tank 12 is connected with the other end of the sewage discharge pipeline 5, and the third liquid level transmitter 4 is arranged on the sewage discharge gathering tank 12.
In order to ensure the interlocking control of the liquid level regulating valve 8, the first liquid level transmitter 2 is connected with the liquid level regulating valve 8; in order to ensure the interlocking control of the second liquid level transmitter 3 on the first safety shut-off valve 6, the second liquid level transmitter 3 is connected with the first safety shut-off valve 6; in order to ensure the interlocking control of the third liquid level transmitter 4 on the second safety shut-off valve 10, the third liquid level transmitter 4 is connected with the second safety shut-off valve 10; in order to ensure the interlocking control of the pressure transmitter 11 on the second safety shut-off valve 10, the pressure transmitter 11 is connected with the second safety shut-off valve 10.
Wherein the content of the first and second substances,
the first liquid level transmitter 2 and the second liquid level transmitter 3 are magnetostrictive liquid level transmitters which are installed through side flanges. The first liquid level transmitter 2 is used for controlling the liquid level regulating valve 8 in an interlocking manner and setting a high alarm limit value and a low alarm limit value; the second liquid level transmitter 3 is used for interlocking control of the first safety shut-off valve 6 and setting a low alarm limit value.
The liquid level regulating valve 8 adopts an axial flow type liquid level regulating valve, the caliber of the axial flow type liquid level regulating valve is 1 inch, a first actuating mechanism is arranged, the type is fault safety type, and the accident state is FC. The installation distance between the liquid level regulating valve 8 and the upstream first process ball valve 7 (cutoff ball valve) is not less than 600mm. In order to realize the automatic sewage discharge function, the adjusting function of the liquid level adjusting valve 8 effectively reduces the flow rate of the sewage discharge and controls the sewage discharge pressure to be lower than the operating pressure of the sewage discharge header tank 12.
In order to prevent overflow accidents caused by the fact that the liquid level of the sewage collection tank 12 is ultrahigh during sewage discharge operation, a third liquid level transmitter 4 is arranged on the sewage collection tank 12.
In order to prevent the liquid level regulating valve 8 from losing efficacy (when the liquid level regulating valve can not be closed) to cause gas to leak to a sewage draining device, a first safety shut-off valve 6 is arranged at the upstream of the liquid level regulating valve 8. The first safety cut-off valve 6 is provided with a second actuating mechanism, the type is failure safety type, and the accident state is FC.
In order to prevent an overpressure in the waste collection tank 12 due to an uncontrolled discharge pressure after failure of the level control valve 8, a second safety shut-off valve 10 is provided in the manifold close to the inlet of the waste collection tank 12. The second safety cut-off valve 10 is provided with a third actuating mechanism, the type is failure safety type, and the accident state is FC.
The online automatic sewage discharging device is not limited to online sewage discharging control of one sewage discharging pipeline, a plurality of filters can be arranged, 2 liquid collecting bags are arranged below each filter, and a first liquid level transmitter 2, a second liquid level transmitter 3, a first safety shut-off valve 6, a first process ball valve 7, a liquid level adjusting valve 8 and a second process ball valve 9 are arranged on each sewage discharging pipeline. The multi-channel sewage discharge pipeline is connected to a sewage discharge header, a pressure transmitter 11 and a second safety shut-off valve 10 are arranged on the sewage discharge header at a position close to the sewage discharge header, and a third liquid level transmitter 4 is arranged on the sewage discharge header 12.
The equipment in the online automatic sewage discharge device is designed to be installed in the open air, the protection grade is not lower than IP65, the explosion-proof grade is not lower than EXdIIBT4, and the requirements of open-air environment and field explosion-proof are completely met; the equipment of the online pollution discharge device is automatically controlled by the SCADA system, and can also be switched to a remote manual control mode and a local manual control mode, so that the subsequent management and control are facilitated.
The online automatic sewage discharging method adopting the online automatic sewage discharging device comprises the following steps:
step 1, a first liquid level transmitter 2 on a liquid collection bag 14 measures a liquid level value of the liquid collection bag 14, the first liquid level transmitter 2 judges the liquid level value to determine whether to start a liquid level regulating valve 8 on a sewage drainage pipeline 5, when the first liquid level transmitter 2 measures that the liquid level value of the liquid collection bag 14 is a high liquid level value, the liquid level regulating valve 8 is opened, and when the first liquid level transmitter 2 measures that the liquid level value of the liquid collection bag 14 is a low liquid level value, the liquid level regulating valve is closed;
when the liquid level regulating valve 8 fails and cannot be closed, closing a first safety shut-off valve 6 arranged at the upstream of the liquid level regulating valve 8;
meanwhile, a first liquid level measurement signal of the first liquid level transmitter 2 is connected into the instrument junction box 13 through a first instrument cable 15, and an adjusting signal of the liquid level adjusting valve 8 is connected into the instrument junction box 13 through a fourth instrument cable 18;
meanwhile, a second liquid level measuring signal of the second liquid level transmitter 3 is connected into the instrument junction box 13 through a second instrument cable 16, and a first cut-off signal of the first safety cut-off valve 6 is connected into the instrument junction box 13 through a third instrument cable 17;
a pressure transmitter 11 between the liquid level regulating valve 8 and the second safety shut-off valve 10 measures the pressure value of the sewage discharge pipeline 5, the pressure transmitter 11 judges the pressure value to determine whether to close the second safety shut-off valve 10, and when the pressure transmitter 11 measures that the pressure value of the sewage discharge pipeline 5 is a high pressure value, the second safety shut-off valve 10 is closed;
meanwhile, a third liquid level measurement signal of the third liquid level transmitter 4 is connected into the instrument junction box 13 through a seventh instrument cable 21, a pressure signal of the pressure transmitter 11 is connected into the instrument junction box 13 through a fifth instrument cable 19, and a second cut-off signal of the second safety cut-off valve 10 is connected into the instrument junction box 13 through a sixth instrument cable 20;
and 4, receiving a first liquid level measurement signal of the first liquid level transmitter 2, a second liquid level measurement signal of the second liquid level transmitter 3, a third liquid level measurement signal of the third liquid level transmitter 4, a first cut-off signal of the first safety cut-off valve 6, an adjusting signal of the liquid level adjusting valve 8, a second cut-off signal of the second safety cut-off valve 10 and a pressure signal of the pressure transmitter 11 by the instrument junction box 13, and transmitting data to the SCADA system through the bus.
The first process ball valve 7 between the first safety cut-off valve 6 and the liquid level regulating valve 8, the second process ball valve 9 between the liquid level regulating valve 8 and the pressure transmitter 11 are kept normally open, and when the liquid level regulating valve 8 needs to be maintained, the first process ball valve 7 and the second process ball valve 9 are closed.
The invention effectively reduces the flow rate of sewage discharge by utilizing the adjusting function of the liquid level adjusting valve and controls the sewage discharge pressure to be lower than the operating pressure of the sewage discharge collecting tank. In addition, set up a safety shut-off valve at blowdown collection jar inlet pipeline, set up a pressure transmitter before the safety shut-off valve, set up level transmitter on blowdown collection jar, chain liquid level and pressure and safety shut-off valve, when pressure reaches the design pressure that blowdown was collected jar or blowdown collection jar liquid level reaches the setting value, chain safety shut-off valve of closing the blow off pipe entry and report to the police, can prevent because the emergence that blowdown that exhaust pressure and flow lead to is collected jar superpressure or overflow accident because the liquid level control valve loses efficacy after uncontrollable.
Meanwhile, the online automatic sewage discharge is carried out according to the height of the liquid level in the filtering equipment (liquid collecting bag). When the liquid level in the filtering equipment reaches a high liquid level value, the liquid level regulating valve is automatically opened, and the liquid is discharged to a downstream closed sewage collection tank; when the liquid level in the filter reaches a low level value, the liquid level regulating valve is automatically closed. Meanwhile, in order to prevent the liquid level regulating valve from losing efficacy (when the liquid level regulating valve can not be closed) to cause gas to leak to the downstream of the sewage draining device, a safety cut-off valve is arranged at the upstream of the liquid level regulating valve. When the liquid level in the liquid collection bag reaches a low alarm value, the safety cut-off valve is triggered to be closed, so that the liquid level is prevented from being further reduced.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. An online automatic blowdown device of a gas transmission pipeline station is characterized by comprising:
the bottom of the filter (1) is connected with a liquid collecting bag (14), and a first liquid level transmitter (2) and a second liquid level transmitter (3) are arranged on the liquid collecting bag (14);
one end of the sewage draining pipeline (5) is connected with the liquid collecting bag (14), a first process ball valve (7) is arranged on the sewage draining pipeline (5), a first safety shut-off valve (6) is arranged at the upstream of the first process ball valve (7), a liquid level regulating valve (8) is arranged at the downstream of the first process ball valve (7), a second process ball valve (9) is arranged at the downstream of the liquid level regulating valve (8), a second safety shut-off valve (10) is arranged at the downstream of the second process ball valve (9), a pressure transmitter (11) is arranged on the sewage draining pipeline (5) between the second process ball valve (9) and the second safety shut-off valve (10), the first liquid level transmitter (2) is connected with the liquid level regulating valve (8), and the second liquid level transmitter (3) is connected with the first safety shut-off valve (6);
the blowdown collection tank (12) is connected with the other end of the blowdown pipeline (5), a third liquid level transmitter (4) is arranged on the blowdown collection tank (12), the third liquid level transmitter (4) and the pressure transmitter (11) are connected with the second safety shut-off valve (10), and the first liquid level transmitter (2) and the second liquid level transmitter (3) are connected with the liquid collection bag (14) through flanges on the side faces of the liquid level transmitters;
instrument connection box (13), its with first liquid level transmitter (2) second liquid level transmitter (3) first safety shut-off valve (6) liquid level control valve (8) pressure transmitter (11) second safety shut-off valve (10) with third liquid level transmitter (4) are connected, first liquid level transmitter (2) are inserted through first instrument cable (15) instrument connection box (13), second liquid level transmitter (3) are inserted through second instrument cable (16) instrument connection box (13), first safety shut-off valve (6) are inserted through third instrument cable (17) instrument connection box (13), liquid level control valve (8) are inserted through fourth instrument cable (18) instrument connection box (13), pressure transmitter (11) are inserted through fifth instrument cable (19) instrument connection box (13), second safety shut-off valve (10) are inserted through sixth instrument cable (20) instrument connection box (13), third liquid level transmitter (4) are inserted through seventh instrument cable (21) instrument connection box (13).
2. The online automatic blowdown device of the gas transmission pipeline station according to claim 1, wherein the first liquid level transmitter (2) and the second liquid level transmitter (3) are both magnetostrictive liquid level transmitters.
3. The online automatic blowdown device of the gas transmission pipeline station according to claim 1, wherein the installation distance between the liquid level regulating valve (8) and the first process ball valve (7) is not less than 600mm.
4. The on-line automatic blowdown device for a gas transmission pipeline station according to claim 1, wherein the liquid level regulating valve (8) is an axial flow type liquid level regulating valve.
5. The on-line automatic blowdown device of gas transmission pipeline station according to claim 1, wherein said first process ball valve (7) and said second process ball valve (9) are both truncated ball valves.
6. The on-line automatic blowdown device for a gas transmission pipeline station according to claim 1, wherein the liquid level regulating valve (8) is connected with a first actuator.
7. The on-line automatic blowdown device for a gas transmission pipeline station according to claim 1, wherein the first safety shut-off valve (6) is connected with a second actuator.
8. The on-line automatic blowdown device for a gas transmission pipeline station according to claim 1, wherein the second safety shut-off valve (10) is connected with a third actuator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710197594.3A CN106838618B (en) | 2017-03-29 | 2017-03-29 | Online automatic waste fitting discharging of gas transmission pipeline station yard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710197594.3A CN106838618B (en) | 2017-03-29 | 2017-03-29 | Online automatic waste fitting discharging of gas transmission pipeline station yard |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106838618A CN106838618A (en) | 2017-06-13 |
| CN106838618B true CN106838618B (en) | 2023-01-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710197594.3A Active CN106838618B (en) | 2017-03-29 | 2017-03-29 | Online automatic waste fitting discharging of gas transmission pipeline station yard |
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Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2480664Y (en) * | 2001-06-07 | 2002-03-06 | 彭国军 | Automatic liquid discharger for gas tank |
| CN2677730Y (en) * | 2004-02-10 | 2005-02-09 | 北京超拓远大石油科技有限公司 | Separater fluid discharger |
| JP4984325B2 (en) * | 2007-06-18 | 2012-07-25 | 株式会社Ｉｈｉ | Liquefied gas receiving storage device |
| CN203903972U (en) * | 2014-04-28 | 2014-10-29 | 天津联汇油气技术有限公司 | Oil filling system |
| CN104390142B (en) * | 2014-11-12 | 2017-02-15 | 中国石油天然气股份有限公司 | Gas-liquid separator automatic drainage system with emergency drainage capacity |
| CN204372556U (en) * | 2014-12-10 | 2015-06-03 | 中国石油天然气股份有限公司 | A kind of separator automatic drain interlock protection device |
| CN105861025B (en) * | 2016-06-02 | 2017-07-18 | 中国石油天然气集团公司 | The retracting device and method of a kind of gas pipeline liquid light hydrocarbon |
| CN206723841U (en) * | 2017-03-29 | 2017-12-08 | 中国石油天然气集团公司 | A kind of on-line automatic blowdown apparatus of gas pipeline yard |
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2017
- 2017-03-29 CN CN201710197594.3A patent/CN106838618B/en active Active
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| CB03 | Change of inventor or designer information |
Inventor after: Yu Yongzhi Inventor after: Nie Zhongwen Inventor after: Leng Xulin Inventor after: Liang Jun Inventor after: Zhang Shuyong Inventor after: Wang Yongji Inventor after: Wang Yong Inventor after: Fu Zhe Inventor before: Yu Yongzhi Inventor before: Nie Zhongwen Inventor before: Zhang Shuyong Inventor before: Wang Yongji Inventor before: Wang Yong Inventor before: Fu Zhe |
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Address after: 100007 Liupukang, Xicheng District, Beijing Applicant after: CHINA NATIONAL PETROLEUM Corp. Applicant after: China Petroleum Pipeline Engineering Co.,Ltd. Applicant after: DESIGN BRANCH OF CHINA PETROLEUM PIPELINE ENGINEERING Corp. Address before: 100007 Liupukang, Xicheng District, Beijing Applicant before: China National Petroleum Corp. Applicant before: China Petroleum Pipeline Engineering Co.,Ltd. Applicant before: DESIGN BRANCH OF CHINA PETROLEUM PIPELINE ENGINEERING Corp. |
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Effective date of registration: 20221114 Address after: 100007 No. 9 North Main Street, Dongcheng District, Beijing, Dongzhimen Applicant after: CHINA NATIONAL PETROLEUM Corp. Applicant after: China Petroleum Pipeline Engineering Co.,Ltd. Applicant after: CHINA PETROLEUM PIPELINE ENGINEERING Corp. Address before: 100007 Liupukang, Xicheng District, Beijing Applicant before: CHINA NATIONAL PETROLEUM Corp. Applicant before: China Petroleum Pipeline Engineering Co.,Ltd. Applicant before: DESIGN BRANCH OF CHINA PETROLEUM PIPELINE ENGINEERING Corp. |
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