CN202065679U - Compressed natural gas decompression station - Google Patents
Compressed natural gas decompression station Download PDFInfo
- Publication number
- CN202065679U CN202065679U CN2011200674627U CN201120067462U CN202065679U CN 202065679 U CN202065679 U CN 202065679U CN 2011200674627 U CN2011200674627 U CN 2011200674627U CN 201120067462 U CN201120067462 U CN 201120067462U CN 202065679 U CN202065679 U CN 202065679U
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- pressure
- connects
- natural gas
- heat exchanger
- ball valve
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Abstract
Disclosed is a compressed natural gas decompression station. Compressed high-pressure gas sequentially passes through an inlet filter, a flange ball valve and an emergency shutoff ball valve to enter a natural gas heat exchanger, and passes through a heat exchanger output pipeline to a primary natural gas pressure regulator. The gas subjected to pressure regulation enters the heat exchanger again, and a heat exchanger output pipeline is connected with the outlet flange ball valve through a secondary natural gas pressure regulator. The compressed natural gas decompression station transmits natural gas applicable to conditions of a user to a gas supply point after two-stage pressure regulation. A linkage control function for ultralow pressure prior to primary pressure regulation, over high pressure after primary pressure regulation and ultralow temperature after primary pressure regulation, namely the emergency shutoff ball valve on a natural gas inlet pipe is closed to prevent over high pressure and ensure operational safety and reliability of the decompression station in case of pressure low limit warning prior to primary pressure regulation, pressure high limit warning after primary regulation and temperature low limit warning after primary pressure regulation.
Description
Technical field
The utility model belongs to chemical machinery, particularly a kind of compressed natural gas pressure-reducing station.
Background technique
The compressed natural gas of high pressure (working pressure 200bar～30bar) pressure is adjusted to 7bar～9bar through the decompression heating.High-pressure natural gas because puffing needs to absorb a large amount of heats, and this heat is provided by heat exchanger, and this control system plays the security monitoring effect in the heat exchange decompression process, has been avoided because the accident that inopportune operation causes in decompression process.
Summary of the invention
Technical problem to be solved in the utility model is: a kind of compressed natural gas pressure-reducing station.
The technical solution of the utility model is: the compressed natural gas pressure-reducing station, compressed natural gas connects import Emergeny Cutoff Valves, import Emergeny Cutoff Valves connection first-class heat exchanger through inlet filter adpting flange ball valve, filter, and the first-class heat exchanger outlet connects one-level rock gas pressure governor; The outlet of one-level rock gas pressure governor connects secondary heat exchanger; The secondary heat exchanger output tube connects secondary rock gas pressure governor, and secondary rock gas pressure governor exports the user to through the outlet(discharge) flange ball valve and uses the gas point;
The PT101 pressure transducer connects the PICA101 pressure controller, and the PT102 pressure transducer connects the PICA102 pressure controller, and the TT101 temperature transducer connects the TICA101 temperature controller; Instrument air connects the SV solenoid valve through ball valve, and the SV solenoid valve exports the Emergeny Cutoff Valves pneumatic actuator to;
The PICA101 pressure controller connects interlock control system, and the PICA102 pressure controller connects interlock control system, and the TICA101 temperature controller connects interlock control system, and interlock control system connects Emergeny Cutoff Valves source of the gas pipeline SV solenoid valve;
Relief line is provided with PT101～PT102 pressure transducer, PI101～PI102 pressure-display instrument, TT101 temperature transducer.
The utility model effect is:
The utility model compressed natural gas pressure-reducing station, the decompression entrance pipe is provided with Emergeny Cutoff Valves, is provided with pressure transmitter and temperature transmitter on relief line, by detecting the pressure and temperature interlocked control import Emergeny Cutoff Valves of decompression front and back.
Introduced after hypotony before the one-level decompression, the one-level pressure regulation the low excessively interlocked control function of temperature after the overpressure and one-level pressure regulation in this system, if occur promptly before the one-level decompression that the pressure lower bound is reported to the police, after the one-level pressure regulation the high limit of pressure report to the police and the one-level pressure regulation after the temperature lower bound report to the police and then close the solenoid valve that is installed in Emergeny Cutoff Valves source of the gas pipeline on the compressed natural gas entrance pipe, in case overpressure or the low excessively phenomenon of temperature occur, guarantee the depressurized system safe and reliable operation.
Description of drawings
Fig. 1 is compressed natural gas pressure-reducing station pipeline and control flow chart
Fig. 2 is compressed natural gas pressure-reducing station pipeline and control circuit figure,
Among the figure: 1 high pressure filter, 2 Flange Ball Valvess, 3 Emergeny Cutoff Valvess, 4 one-level pressure governors, 5 secondary pressure governors, 6 heat exchangers, 7 Flange Globe Valvess, N1 compressed natural gas inlet, N2 hot water inlet, the N3 hot water outlet, N4 decompression back gas outlet, SV solenoid valve, P1～P3 pressure meter, PT101～PT102 pressure transducer, TT101 gas phase temperature transmitter, PI101～PI102 pressure-display instrument, the RT fus, pressure lower bound tutorial light before D1 one transfers, D2 one are transferred the high limit of back pressure tutorial light, and D3 one transfers back temperature lower bound tutorial light, D4 solenoid valve work indicator light, the KA1-KA4 relay, PB ann silence button, BZ alarm buzzer.
Embodiment
A kind of compressed natural gas pressure-reducing station as shown in Figure 1, compressed natural gas through inlet filter adpting flange ball valve, filter connect the import Emergeny Cutoff Valves, the import Emergeny Cutoff Valves connects first-class heat exchanger, the first-class heat exchanger outlet connects one-level rock gas pressure governor; The outlet of one-level rock gas pressure governor connects secondary heat exchanger; The secondary heat exchanger output tube connects secondary rock gas pressure governor, and secondary rock gas pressure governor exports the user to through the outlet(discharge) flange ball valve and uses the gas point;
The PT101 pressure transducer connects the PICA101 pressure controller, and the PT102 pressure transducer connects the PICA102 pressure controller, and the TT101 temperature transducer connects the TICA101 temperature controller; Instrument air connects the SV solenoid valve through ball valve, and the SV solenoid valve exports the Emergeny Cutoff Valves pneumatic actuator to;
The PICA101 pressure controller connects interlock control system, and the PICA102 pressure controller connects interlock control system, and the TICA101 temperature controller connects interlock control system, and interlock control system connects Emergeny Cutoff Valves source of the gas pipeline SV solenoid valve;
Relief line is provided with PT101～PT102 pressure transducer, PI101～PI102 pressure-display instrument, TT101 temperature transducer.
Compressed natural gas can realize compressing high-pressure natural gas by second depressurized pressure governor decompression back output, because operation or equipment failure cause pressure or temperature anomaly, in time cuts off the inlet cut-off valve, to reach the purpose of safe transport natural gas in decompression process.
Because temperature lower bound after the high limit of pressure and the one-level pressure regulation after pressure lower bound, the one-level pressure regulation before the one-level decompression, the phenomenon of overpressure all may appear, and can influence the depressurized system safe and reliable operation, and user's production is impacted.Therefore, in control system, introduced interlock control system.
Pressure transmitter PT101 before compressed natural gas inlet to outlet is provided with the one-level decompression, one-level decompression back pressure transmitter PT102 and one-level decompression back temperature transmitter TT101, setting pressure lower bound alarm point on pressure controller PICA101 accordingly, pressure controller PICA102 goes up the high limit of setting pressure alarm point, setting temperature lower bound alarm point on temperature controller TICA101, pressure lower bound before the one-level pressure regulation takes place, after the one-level pressure regulation after high limit of pressure or the one-level pressure regulation during temperature lower bound, promptly send acoustooptic alarm, cut off the power supply of solenoid valve SV simultaneously, instrument air is cut off, Emergeny Cutoff Valves cuts out fully, guarantee safety.Get rid of when fault, when overload alarm was removed, solenoid valve SV restored electricity, and Emergeny Cutoff Valves can enter normal state of a control again.
Claims (1)
1. compressed natural gas pressure-reducing station, it is characterized in that: compressed natural gas connects import Emergeny Cutoff Valves, import Emergeny Cutoff Valves connection first-class heat exchanger through inlet filter adpting flange ball valve, filter, and the first-class heat exchanger outlet connects one-level rock gas pressure governor; The outlet of one-level rock gas pressure governor connects secondary heat exchanger; The secondary heat exchanger output tube connects secondary rock gas pressure governor, and secondary rock gas pressure governor exports the user to through the outlet(discharge) flange ball valve and uses the gas point;
The PT101 pressure transducer connects the PICA101 pressure controller, and the PT102 pressure transducer connects the PICA102 pressure controller, and the TT101 temperature transducer connects the TICA101 temperature controller; Instrument air connects the SV solenoid valve through ball valve, and the SV solenoid valve exports the Emergeny Cutoff Valves pneumatic actuator to;
The PICA101 pressure controller connects interlock control system, and the PICA102 pressure controller connects interlock control system, and the TICA101 temperature controller connects interlock control system, and interlock control system connects Emergeny Cutoff Valves source of the gas pipeline SV solenoid valve;
Relief line is provided with PT101～PT102 pressure transducer, PI101～PI102 pressure-display instrument, TT101 temperature transducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200674627U CN202065679U (en) | 2011-03-15 | 2011-03-15 | Compressed natural gas decompression station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200674627U CN202065679U (en) | 2011-03-15 | 2011-03-15 | Compressed natural gas decompression station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202065679U true CN202065679U (en) | 2011-12-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200674627U Expired - Fee Related CN202065679U (en) | 2011-03-15 | 2011-03-15 | Compressed natural gas decompression station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202065679U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102927444A (en) * | 2012-11-05 | 2013-02-13 | 陈玲海 | Control type pressure regulating system of compressed natural gas |
| CN105465604A (en) * | 2016-01-04 | 2016-04-06 | 陕西铭泽燃气工程有限公司 | Compressed natural gas releasing device and power generation method employing pressure potential |
| CN108050716A (en) * | 2018-01-16 | 2018-05-18 | 深圳中燃哈工大燃气技术研究院有限公司 | A kind of voltage-regulating system and method using geothermal heating natural gas |
-
2011
- 2011-03-15 CN CN2011200674627U patent/CN202065679U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102927444A (en) * | 2012-11-05 | 2013-02-13 | 陈玲海 | Control type pressure regulating system of compressed natural gas |
| CN102927444B (en) * | 2012-11-05 | 2015-02-11 | 陈玲海 | Control type pressure regulating system of compressed natural gas |
| CN105465604A (en) * | 2016-01-04 | 2016-04-06 | 陕西铭泽燃气工程有限公司 | Compressed natural gas releasing device and power generation method employing pressure potential |
| CN108050716A (en) * | 2018-01-16 | 2018-05-18 | 深圳中燃哈工大燃气技术研究院有限公司 | A kind of voltage-regulating system and method using geothermal heating natural gas |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111207 Termination date: 20160315 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |