CN202613047U - Natural gas transmission system - Google Patents
Natural gas transmission system Download PDFInfo
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- CN202613047U CN202613047U CN 201220245749 CN201220245749U CN202613047U CN 202613047 U CN202613047 U CN 202613047U CN 201220245749 CN201220245749 CN 201220245749 CN 201220245749 U CN201220245749 U CN 201220245749U CN 202613047 U CN202613047 U CN 202613047U
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- compressor
- valve
- recycling
- pressure
- natural gas
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Abstract
The utility model provides a natural gas transmission system which comprises a recovery tank, a compressor, a gas storage device and a gas circulation pipeline. A gas inlet pipeline of the compressor is provided with a first valve, and the recovery tank and the compressor are connected through the gas circulation pipeline which is provided with a second valve. When an operating state of the compressor meets a preset shutdown condition, the first valve is closed and a first controller of the second valve is opened; and when a first pressure detector which is used for detecting gas pressure in the recovery tank in real time detects that a value of the pressure in the recovery tank is smaller than a preset pressure value, the second valve is closed and a second controller operated by the compressor is stopped. Using the natural gas transmission system can recover natural gas retained in the recovery tank to lower the pressure in the recovery tank, and the compressor is started in an underloaded manner, so that electricity is saved, a motor is protected, and overload is prevented.
Description
Technical field
The utility model belongs to chemical field, relates in particular to a kind of natural gas transmission system.
Background technique
Rock gas has cleaning and economic advantage as the energy, increasingly is applied to automobile as power fuel.Much do not having gas distributing system or can not rely on the place of gas distributing system gas production, many rock gases substation occurring and given refueling.
Present rock gas substation source of the gas derives from the CNG transport vehicle, and referring to the structural representation of the natural gas supply sub-station gas transmission system shown in Fig. 1, this system comprises: recycling can 001, caisson 002, compressor 003 and first valve 004.The characteristics of gas transmission are that gas can transfer to the low pressure place from high pressure automatically.When caisson 002 pressure of natural gas supply sub-station was lower than the transport vehicle internal pressure, the rock gas in the CNG transport vehicle was directly imported caisson 002; When caisson 002 pressure of substation is greater than or equal to CNG transport vehicle internal pressure; Open first valve 004; With getting into caisson 002 again after 003 pressurization of natural gas via overcompression machine; Waste liquid waste gas with compressor 002 after compressor is out of service exports in the recycling can 001, by recycling can 001 waste gas and waste liquid is recycled or is discharged.
The distribution pressure scope of CNG transport vehicle is 20 ~ 3MPa (G), and the pressure in the recycling can is identical with the final stage pipeline pressure that compressor is shut down blowdown at every turn, is generally about 6MPa.At this moment, the startup of compressor is that high load starts, and power consumption increase and compressor and motor are fragile.
The model utility content
In view of this, the purpose of the utility model is to provide a kind of natural gas transmission system, can the rock gas in the recycling can be reclaimed be compressed in the caisson, reduces the pressure in the recycling can, and the compressor low-load is started.
A kind of natural gas transmission system comprises recycling can, compressor and caisson; The admission line of said compressor is provided with first valve; Also comprise:
The gas communication pipeline that connects said recycling can and said compressor; Said circulation duct is provided with second valve;
Link to each other with said compressor, first valve and second valve respectively, when the running state of said compressor reaches preset halt condition, close said first valve, and open first controller of said second valve;
Link to each other with said recycling can, detect first pressure detector of gas pressure value in the said recycling can in real time;
Link to each other with compressor with said first pressure detector, second valve respectively; When said first pressure detector detects force value in the said recycling can and is lower than preset pressure value; Close said second valve, and control said compressor second controller out of service.
Above-mentioned natural gas transmission system, preferred, also comprise:
Link to each other with first controller with said compressor respectively, detect the force value of compressor in real time, and the force value of the compressor that detection is obtained transfers to second pressure detector of first controller.
Above-mentioned natural gas transmission system, preferred, also comprise:
Link to each other with said compressor, when said compressor reaches preset halt condition, the timer that begins said compressor is carried out timing.
Above-mentioned natural gas transmission system, preferred, also comprise:
Link to each other with compressor with said timer respectively, to said compressor send three controller of forcing out of service instruction when surpassing the Preset Time value working time when said compressor is in preset halt condition.
Above-mentioned natural gas transmission system, preferred, also be provided with one-way valve on the said circulation duct, the opening direction of said one-way valve is for to flow to compressor from recycling can.
Above-mentioned natural gas transmission system, preferred, also comprise:
Be arranged at the draining valve of the Drainage pipe of said recycling can.
Above-mentioned natural gas transmission system, preferred, also comprise:
Be arranged at said recycling can relief pipeline, when said recycling can pressure during greater than preset safety value to said recycling can in gas discharge the safety valve of step-down.
The utility model provides a kind of natural gas transmission system, comprises recycling can, compressor and caisson; The admission line of said compressor is provided with first valve; Also comprise: the gas communication pipeline that connects said recycling can and said compressor; Said circulation duct is provided with second valve; Link to each other with said compressor, first valve and second valve respectively, when the running state of said compressor reaches preset halt condition, close said first valve, and open first controller of said second valve; Link to each other with said recycling can, detect first pressure detector of gas pressure value in the said recycling can in real time; Link to each other with compressor with said first pressure detector, second valve respectively; When said first pressure detector detects force value in the said recycling can and is lower than preset pressure value; Close said second valve, and control said compressor second controller out of service.A kind of natural gas transmission system that adopts that the utility model provides can reclaim the rock gas that retains in the recycling can, reduces the pressure in the recycling can, when making compressor start, but the compressor low-load start, save power, and protection motor are in order to avoid overload.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technological scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below is some embodiments of the utility model, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of natural gas transmission system in the existing technology;
Fig. 2 is the structural representation of a kind of natural gas transmission system embodiment 1 of providing of the utility model;
Fig. 3 is the structural representation of a kind of natural gas transmission system embodiment 2 of providing of the utility model;
Fig. 4 is the structural representation of a kind of natural gas transmission system embodiment 3 of providing of the utility model.
Embodiment
For the purpose, technological scheme and the advantage that make the utility model embodiment clearer; To combine the accompanying drawing among the utility model embodiment below; Technological scheme among the utility model embodiment is carried out clear, intactly description; Obviously, described embodiment is the utility model part embodiment, rather than whole embodiments.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment who is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
A kind of natural gas transmission system that the utility model provides is applied to natural gas supply sub-station, the rock gas of storing in the CNG transport vehicle is input in the process of the caisson in the rock gas substation, reduces the pressure in the recycling can, and the compressor low-load is started.
Referring to Fig. 2; Show the structural representation of a kind of natural gas transmission system embodiment 1 that the utility model provides, comprising: recycling can 101, caisson 102, compressor 103, first valve 104, gas communication pipeline 105, second valve 106, first controller 107, first pressure detector 108 and second controller 109.
Solid line is represented among the figure is that pipeline in the actual enforcement links to each other, and dotted line is represented is that electric wiring in the actual enforcement is continuous.
Wherein, the waste gas and waste liquid that produces in 101 pairs of compressors 103 of said recycling can reclaims, and the waste gas and waste liquid that produces in compressor 103 runnings is delivered to recycling can 101, discharges through the sewage draining exit of recycling can 101 again.
Wherein, said caisson 102 is used to store rock gas, and this rock gas is come by the transmission of CNG transport vehicle.
Wherein, said compressor 103 links to each other with said caisson 102, and when the pressure of CNG transport vehicle was less than or equal to the pressure of natural gas supply sub-station caisson 102, the rock gas that said transport vehicle is transmitted carried out supercharging;
Link to each other through two pipelines between caisson 102 and the CNG transport vehicle, one directly links to each other, and one links to each other through compressor 103.
CNG transport vehicle transmission rock gas is 20 ~ 3MPa (G) to the pressure range in the air entraining substation, and when the pressure in the caisson 102 was lower than said CNG transport vehicle transmission pressure, said CNG transport vehicle can directly be transferred to rock gas in the caisson 102; Increase along with storage rock gas in the caisson 102; The pressure of caisson 102 also increases gradually; When the pressure in the caisson 102 no longer is lower than said CNG transport vehicle transmission pressure; Said CNG transport vehicle can not directly be transferred to rock gas in the caisson 102 again, needs this moment the rock gas of 103 pairs of said CNG transport vehicle transmission of compressor to carry out pressurized treatment.
Wherein, said first valve 104 links to each other with said compressor 103 suction ports;
When pressure in the caisson 102 during less than the pressure of CNG transport vehicle, first valve 104 is closed, and opens the pipeline of direct connection caisson 102 and CNG transport vehicle; When pressure in the caisson 102 during more than or equal to the pressure of CNG transport vehicle, first valve 104 is opened, and opens the pipeline that is connected with compressor 103 rock gas of said CNG transport vehicle transmission is carried out pressurized treatment.
Wherein, gas communication pipeline 105 connects said recycling can 101 and said compressor 103, and the gas between recycling can 101 and the compressor 103 can be circulated;
Said second valve 106 is arranged on the said gas communication pipeline 105; Gas communication between control recycling can 101 and the compressor 103 can be carried out Compression and Transmission in caisson 102 with the natural gas transport in the recycling can 101 through second valve 106 in compressor 103.
Wherein, Said first controller 107 links to each other with second valve 106 with said compressor 103, first valve 104 respectively; When said compressor 103 running statees reach preset halt condition, control that said first valve 104 is closed and said second valve 106 is opened;
When compressor 103 running statees reach preset halt condition, need reclaim decompression to the rock gas in the recycling can 101, when guaranteeing that compressor starts for 103 next times, promptly compressor 103 is that low-load starts during the combustion gas waste liquid in recycling can 101.
At this moment; Close first valve 104; Cut off getting in touch between caisson 102 and the CNG transport vehicle; And open second valve 106, and recycling can 101, compressor 103 and caisson 102 are formed a path, and compressor 103 is reduced to the natural pressure that comes through 106 transmission of second valve in the recycling can 101 in the caisson 102.
Wherein, said first pressure detector 108 links to each other with said recycling can 101, detects gas pressure value in the said recycling can 101 in real time;
Wherein, Said second controller 109 links to each other with compressor 103 with said first pressure detector 108, second valve 106 respectively with said respectively; When said first pressure detector 108 detects force value in the said recycling can 101 and is lower than preset pressure value; Close said second valve 106, and it is out of service to control said compressor 103.
After said first valve 104 was closed, second valve 106 opens, the rock gas in the recycling can 101 flowed in the compressor 103 automatically, and compressor 103 is reduced to this natural pressure in the caisson 102.
Output along with rock gas in the recycling can 101; The pressure of recycling can 101 reduces, and when said first pressure detector 108 detected force value in the said recycling can 101 and is lower than preset pressure value, the rock gas that can be recovered in the recycling can 101 was all exported; Second controller 109 is closed second valve 106; Recycling can 101 rock gas that no longer output retains in compressor 103, simultaneously, control compressor 103 is out of service.So far, to the rock gas end of transmission of caisson 102.
In actual the enforcement, the preset pressure value of recycling can be set to 3MPa (identical with the gas output pressure of CNG transport vehicle), or the setting value that is provided with according to actual conditions of user.
In actual the enforcement, first valve and second valve can use the electromagnetic pneumatic ball valve.
In actual the enforcement, when first valve and gas circulation duct are set, need to guarantee that the two is independent of each other.
Can know by the foregoing description 1; When the pressure in the caisson is not less than said CNG transport vehicle transmission pressure; Said CNG transport vehicle can not directly be transferred to rock gas in the caisson, needs this moment compressor that the rock gas of said CNG transport vehicle transmission is carried out pressurized treatment; When compressor behavior reaches preset halt condition; Need reclaim decompression to the rock gas in the recycling can, at this moment, close first valve; Cut off getting in touch between caisson and the CNG transport vehicle; Open second valve that is arranged on the gas communication pipeline that connects recycling can and compressor simultaneously, recycling can, compressor and caisson are formed a path, and compressor is reduced to the natural pressure that comes through the transmission of second valve in the recycling can in the caisson; Simultaneously, first pressure detector detects the pressure in the recycling can in real time; When first pressure detector detects the pressure obtain in the recycling can and is lower than preset pressure value; Be the rock gas that can be recovered in the recycling can when all exporting, second valve is closed in the control of second controller, the rock gas that no longer output retains in compressor; Simultaneously, the control compressor is out of service.So far, to the rock gas end of transmission of caisson.A kind of natural gas transmission system that adopts that present embodiment provides can reclaim the rock gas that retains in the recycling can, reduces the pressure in the recycling can, but the compressor low-load is started, and save power, and protection motor are in order to avoid overload.
Referring to Fig. 3, show the structural representation of a kind of natural gas transmission system embodiment 2 that the utility model provides, present embodiment is on embodiment 1 structure, also comprises: second pressure detector 110, timer 111 and the 3rd controller 112.
Wherein, said second pressure detector 110 links to each other with first controller 107 with compressor 103 respectively, detects the force value of compressor 103 in real time, and the force value that detection obtains is exported to first controller 107.
The preset halt condition of compressor 103 can be set to: when the force value of said compressor reaches predefined value, need compressor out of service.
When the force value of compressor 103 reached predefined value, first controller 107 was closed first valve 104 and is opened second valve 106, and the rock gas that retains in the recycling can 101 is reclaimed compression, reduced the force value in the recycling can 101.
Wherein, said timer 111 links to each other with said compressor 103, when said compressor 103 reaches preset halt condition, begins said compressor 103 is carried out timing;
Wherein, the 3rd controller 112 links to each other with compressor 103 with said timer 111 respectively, and the working time when said compressor 103 is in preset halt condition is when surpassing the Preset Time value, said compressor 103 is sent force instruction out of service.
When said compressor 103 reaches preset halt condition; Timer 111 begins compressor is carried out timing, and when timing time surpassed preset time value, the pressure in the recycling can 101 did not also reach preset pressure value; Can think that then this goes wrong to rock gas callback course in the recycling can 101; Not normal such as compressor 103 operations, need to force to stop compressor 103 operations, stop this recovery to rock gas in the recycling can 101.
The preset halt condition of compressor in the present embodiment is: the force value of said compressor reaches predefined value, but is not limited to this, also can set other halt condition in actual the enforcement according to actual conditions.
Can know by the foregoing description 2; Second pressure detector detects pressure in the compressor in real time; When pressure in the compressor reaches the force value of preset halt condition; First controller is closed first valve and is opened second valve, and the rock gas that retains in the recycling can is reclaimed compression, reduces the force value in the recycling can.When compressor reaches preset halt condition; Timer carries out timing to the time that compressor is in halt condition; When timing time surpasses the Preset Time value; Can think that this goes wrong to rock gas callback course in the recycling can, the 3rd controller sends said compressor and forces instruction out of service.A kind of natural gas transmission system that adopts that present embodiment provides can reclaim compression process to the rock gas to retaining in the recycling can of compressor and control, and has guaranteed that callback course is stable.
Referring to Fig. 4, show the structural representation of a kind of natural gas transmission system embodiment 3 that the utility model provides, present embodiment is on embodiment 2 structure, also comprises: one-way valve 113, draining valve 114 and safety valve 115.
Wherein, said one-way valve 113 is arranged on the said circulation duct, and opening direction is for to flow to compressor from recycling can;
103 pairs of recycling cans 101 of compressor carry out in the compression process through the rock gas that 106 transmission of second valve come; For preventing that rock gas from returning recycling can 101 along former road; An one-way valve 113 is set on gas communication pipeline 105, and the transmission direction of rock gas can only be for being transferred to compressor 103 from recycling can 101.
Wherein, said liquid discharging valve 114 is arranged on the Drainage pipe of recycling can 101;
Liquid discharging valve 114 is used for the waste liquid of recycling can 101 is discharged.
After the rock gas end of transmission, the waste liquid that compressor 103 produces in compression process can be discharged in the recycling can 101 through sewage draining exit, and liquid discharging valve 114 is opened, and the Drainage pipe of recycling can 101 is connected with outside, and the waste liquid in the recycling can 101 is discharged.
In actual the enforcement, said liquid discharging valve can adopt ball valve.
Wherein, said safety valve 115 is arranged at said recycling can 101 relief pipelines, when said recycling can 101 pressure during greater than preset safety value to said recycling can 101 in gas discharge step-down.
When pressure was not more than preset safety value in the recycling can 101, safety valve 115 was in closed condition always; Pressure in the recycling can 101 is in case during greater than preset safety value, the device security of recycling can 101 is on the hazard, and safety valve 115 is opened automatically, and recycling can 101 is carried out pressure release.
Can know that by the foregoing description 3 through an one-way valve is set, rock gas can not be back in the recycling can in the compressor between recycling can and compressor, improve the speed that rock gas in the recycling can is reclaimed, effectively reduce the pressure in the recycling can fast; On the Drainage pipe of recycling can, liquid discharging valve is set, the waste liquid in the recycling can is discharged; On the relief pipeline of recycling can, safety valve is set, guarantees the device security of recycling can.
The above only is the preferred implementation of the utility model; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; Can also make some improvement and retouching, these improvement and retouching also should be regarded as the protection domain of the utility model.
Claims (7)
1. a natural gas transmission system comprises recycling can, compressor and caisson; The admission line of said compressor is provided with first valve; It is characterized in that, also comprise:
The gas communication pipeline that connects said recycling can and said compressor; Said circulation duct is provided with second valve;
Link to each other with said compressor, first valve and second valve respectively, when the running state of said compressor reaches preset halt condition, close said first valve, and open first controller of said second valve;
Link to each other with said recycling can, detect first pressure detector of gas pressure value in the said recycling can in real time;
Link to each other with compressor with said first pressure detector, second valve respectively; When said first pressure detector detects force value in the said recycling can and is lower than preset pressure value; Close said second valve, and control said compressor second controller out of service.
2. natural gas transmission according to claim 1 system is characterized in that, also comprises:
Link to each other with first controller with said compressor respectively, detect the force value of compressor in real time, and the force value of the compressor that detection is obtained transfers to second pressure detector of first controller.
3. natural gas transmission according to claim 1 system is characterized in that, also comprises:
Link to each other with said compressor, when said compressor reaches preset halt condition, the timer that begins said compressor is carried out timing.
4. natural gas transmission according to claim 3 system is characterized in that, also comprises:
Link to each other with compressor with said timer respectively, to said compressor send three controller of forcing out of service instruction when surpassing the Preset Time value working time when said compressor is in preset halt condition.
5. natural gas transmission according to claim 1 system is characterized in that also be provided with one-way valve on the said circulation duct, the opening direction of said one-way valve is for to flow to compressor from recycling can.
6. natural gas transmission according to claim 1 system is characterized in that, also comprises:
Be arranged at the draining valve of the Drainage pipe of said recycling can.
7. natural gas transmission according to claim 1 system is characterized in that, also comprises:
Be arranged at said recycling can relief pipeline, when said recycling can pressure during greater than preset safety value to said recycling can in gas discharge the safety valve of step-down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220245749 CN202613047U (en) | 2012-05-29 | 2012-05-29 | Natural gas transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220245749 CN202613047U (en) | 2012-05-29 | 2012-05-29 | Natural gas transmission system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202613047U true CN202613047U (en) | 2012-12-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220245749 Expired - Fee Related CN202613047U (en) | 2012-05-29 | 2012-05-29 | Natural gas transmission system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202613047U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103334902A (en) * | 2013-06-28 | 2013-10-02 | 江汉石油钻头股份有限公司 | Non-emptying unloading start-up system and non-emptying unloading start-up method for compressor |
| CN107664258A (en) * | 2017-08-10 | 2018-02-06 | 吉林省华生燃气集团有限公司 | BOG gas recovery systems in a kind of urban gate station |
| CN108386713A (en) * | 2018-02-12 | 2018-08-10 | 国家电网公司 | A kind of insulating gas processing unit and its control method |
-
2012
- 2012-05-29 CN CN 201220245749 patent/CN202613047U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103334902A (en) * | 2013-06-28 | 2013-10-02 | 江汉石油钻头股份有限公司 | Non-emptying unloading start-up system and non-emptying unloading start-up method for compressor |
| CN107664258A (en) * | 2017-08-10 | 2018-02-06 | 吉林省华生燃气集团有限公司 | BOG gas recovery systems in a kind of urban gate station |
| CN107664258B (en) * | 2017-08-10 | 2019-07-23 | 吉林省华生燃气集团有限公司 | BOG gas recovery system in a kind of urban gate station |
| CN108386713A (en) * | 2018-02-12 | 2018-08-10 | 国家电网公司 | A kind of insulating gas processing unit and its control method |
| CN108386713B (en) * | 2018-02-12 | 2023-12-01 | 国家电网公司 | Insulating gas treatment device and control method thereof |
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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: 20121219 Termination date: 20150529 |
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| EXPY | Termination of patent right or utility model |