CN204756429U - LNG metering device that unloads - Google Patents
LNG metering device that unloads Download PDFInfo
- Publication number
- CN204756429U CN204756429U CN201520558196.6U CN201520558196U CN204756429U CN 204756429 U CN204756429 U CN 204756429U CN 201520558196 U CN201520558196 U CN 201520558196U CN 204756429 U CN204756429 U CN 204756429U
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- Prior art keywords
- pipeline
- control valve
- interface
- liquid
- unloads
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Abstract
The utility model discloses a LNG metering device that unloads, including unloading liquid pipeline and return -air pipeline, the both ends of unloading the liquid pipeline are first interface and second interface respectively, are equipped with first control valve, liquid phase mass flow meter and second control valve in proper order unloading the orientation of liquid pipeline from first interface to the second interface, the both ends of return -air pipeline are third interface and fourth interface respectively, are equipped with third control valve, first contact and second contact in proper order in the orientation of return -air pipeline from the third interface to the fourth interface, even have the concora crush pipeline on first contact, install fourth control valve and gaseous phase mass flow meter on the equalizing pipe way, there is the precooling pipeline in the company of propping up on the second contact, installs the 5th control valve on the precooling pipeline. Like this through set up the precooling pipeline on LNG metering device that unloads, unload before the liquid unload the liquid pipeline and liquid phase mass flow meter carries out the precooling to to avoid unloading the liquid initial stage produce BOG in the pipeline, it lands to show has improved the unload accuracy of measurement of LNG.
Description
Technical field
The utility model relates to LNG gas station, and specifically, particularly a kind of LNG unloads measuring apparatus.
Background technique
At present, LNG (LNG Liquefied natural gas) is widely used as automotive fuel, and on market, the quantity of LNG, L-CNG gas station also gets more and more.When existing mobile tank car unloads liquid to LNG, L-CNG gas station, the main mode adopting weighbridge metering, when not having weighbridge near LNG, L-CNG gas station, tank car will reach far place and just can weigh, and not only wastes time and energy but also very inconvenient; Further, weigh way in exist by steal gas may; Moreover, makings detection cannot be carried out while weighbridge metering.
Current Ye You producer by arranging mass flowmenter respectively on liquid feeding pipeline and return line, directly the flow of liquid feeding pipeline and return line is measured, thus avoid tank car to reach far place weighing, metering of not only unloading is convenient, and improve the degree of accuracy of metering, and carry out makings detection while metering.
But this return line is only used as BOG between gas station and tank car (flashed vapour that LNG gasification produces) circulation, can not carry out return-air to unloading the BOG produced in liquid feeding pipeline in liquid process.When actual unloading, LNG in tank car directly flows through liquid feeding pipeline and mass flowmenter, due to the temperature difference of liquid feeding pipeline and mass flowmenter and LNG, easily produce a large amount of BOG unloading the liquid initial stage, and mass flowmenter is when measuring the gas liquid mixture of LNG and BOG, the deviation produced is large, directly causes LNG metering of unloading inaccurate.
Model utility content
The purpose of this utility model is to provide a kind of LNG of accurate measurement to unload measuring apparatus.
The technical solution of the utility model is as follows: a kind of LNG unloads measuring apparatus, comprise and unload liquid pipeline and return line, described two ends of unloading liquid pipeline are respectively first interface and the second interface, are provided with the first control valve, liquid phase quality flowmeter and the second control valve at the described liquid pipeline that unloads successively from first interface to the direction of the second interface; The two ends of described return line are respectively the 3rd interface and the 4th interface, the 3rd control valve, the first contact and the second contact is provided with successively from the 3rd interface to the direction of the 4th interface in described return line, described first contact props up and is connected with concora crush pipeline, the other end of described concora crush pipeline props up to be connected in and unloads on liquid pipeline, and concora crush pipeline and unload liquid pipeline contact between the first control valve and first interface, concora crush pipeline is provided with the 4th control valve and gas phase mass flowmenter; Described second contact props up and is connected with precooling pipeline, the other end of described precooling pipeline also props up to be connected in and unloads on liquid pipeline, and precooling pipeline and unload liquid pipeline contact between liquid phase quality flowmeter and the second control valve, described precooling pipeline is provided with the 5th control valve.
Adopt said structure, provide a kind of LNG to unload measuring apparatus, all control valves before use on this measuring apparatus are all close, in using process, first first interface, the second interface, the 3rd interface and the 4th interface air outlet respectively by the liquid outlet of unloading of connecting tube and tank car, the liquid entering hole of storage tank, the suction port of tank car and storage tank is connected.Then, carry out first time concora crush, 4th control valve is opened, and by upper for the pump sled valve open controlling the opening and closing of storage tank air outlet, the BOG in gas station storage tank is made to be transported in tank car, make the pressure balance between storage tank and tank car, measured by the BOG of gas phase mass flow meter to conveying simultaneously; It should be noted that, existing pump sled has been provided with the valve controlling the opening and closing of storage tank air outlet, so can directly utilize this valve to determine, whether the 4th interface is communicated with the air outlet of storage tank; If pump sled is not arranged the valve of this control storage tank air outlet opening and closing, corresponding valve can be set at the 4th jointing of this measuring apparatus.After concora crush terminates for the first time, close pump sled upper control the opening and closing of storage tank air outlet valve, close the 4th control valve, open the first control valve, the 5th control valve and the 3rd control valve and carry out precooling, LNG in tank car is exported unloading liquid pipeline and liquid phase quality flowmeter carries out precooling, and the BOG that the LNG exported in tank car and this part LNG produces is circulated back in tank car again by return line.After precooling terminates, close the 5th control valve, open the second control valve and carry out unloading liquid, make the LNG in tank car through unloading liquid pipeline and liquid phase quality flowmeter enters in gas station storage tank, and measured by the LNG of liquid phase quality flowmeter to conveying, terminate until unload liquid.Unload after liquid terminates, the valve open of closing the first control valve and the 3rd control valve, open the 4th control valve and controlling the opening and closing of storage tank air outlet by upper for pump sled, carry out second time concora crush, the BOG in tank car is made to be transported in gas station storage tank, make the pressure balance between storage tank and tank car, measured by the BOG of gas phase mass flow meter to conveying simultaneously.Like this precooling pipeline is set on unloading measuring apparatus at LNG, to unloading liquid pipeline and liquid phase quality flowmeter carries out precooling before unloading liquid, thus avoid unloading the liquid initial stage produce BOG in pipeline, efficiently avoid the accuracy that the BOG unloading the generation of liquid initial stage affects the metering of liquid phase quality flowmeter, considerably improve LNG to unload the accuracy of metering, be conducive to finding and checking stealing the behavior of gas.And, liquid phase quality flowmeter and gas phase mass flowmenter is utilized to measure LNG and BOG of conveying respectively, not only be conducive to the measuring accuracy improving LNG and BOG, and the conveying of LNG and BOG between tank car and storage tank is measured with carrying out nothing left leakage, further ensure that LNG unloads the accuracy of metering, and has carried out the gentle quality detection of accurate metering while LNG unloads.
In actual using process, force value after may there is first time concora crush in tank car is too low, or along with unloading the carrying out of liquid, tank car internal pressure value reduces the situation causing unloading liquid and have some setbacks, and therefore the utility model also comprises pressure piping, and described pressure piping is provided with the 6th control valve.The pressurized machine liquid entering hole of unloading that the two ends of pressure piping are prized with the boost fluid interfaces on tank car, pump respectively can be connected before the use, the air outlet of pressurized machine of unloading is connected with the 4th interface of return line by respective line, when systems axiol-ogy to first time concora crush after or unload liquid process middle slot interior pressure inadequate time (time generally lower than 0.3MPa), by the opening and closing of corresponding control valve, supercharging can be carried out to tank car, make to unload liquid more smooth and easy.It should be noted that, when carrying out supercharging to tank car, the LNG flowed out from tank car can all get back in tank car after pressurized machine gasification of unloading, and does not therefore need to measure this part LNG and BOG.
Also knock out drum is installed described unloading on liquid pipeline, described knock out drum is between the first control valve and liquid phase quality flowmeter, described knock out drum is provided with gas returning port, the gas returning port of knock out drum is connected with separate lines, the other end of described separate lines props up and is connected on concora crush pipeline, and the contact of separate lines and concora crush pipeline is between gas phase mass flow meter and the first contact, described separate lines is provided with the 7th control valve.Knock out drum is set, knock out drum can be utilized to carry out gas-liquid separation to the fluid unloaded in liquid pipeline, reduce and enter the gas of liquid phase quality flowmeter, be conducive to improving further LNG and unload the accuracy of metering.
Described 7th control valve is pneumatic autocontrol valve.7th control valve is set like this, in using process, after the first control valve is opened, LNG is introduced into knock out drum, is flowing through liquid phase quality flowmeter from the liquid outlet of knock out drum, when systems axiol-ogy reaches certain value to the liquid level in knock out drum, can be opened by procedure auto-control the 7th control valve, make the BOG in knock out drum be back in tank car through separate lines and return line, the return-air of knock out drum is realized automatically, uses convenient.
Described pressure piping, separate lines, concora crush pipeline and return line are equipped with drain, drain described in each is all provided with pressure-relief valve.Arrange drain and pressure-relief valve like this, be convenient to unloading after liquid completes, to respectively building the pressure, pipeline carries out release, improves the Security of operation.
Be provided with one-way valve described unloading on liquid pipeline, described one-way valve is between the second control valve and the second interface.Arranging of one-way valve can avoid the LNG in the process of unloading in storage tank to blow back in tank car effectively.
Accompanying drawing explanation
Fig. 1 structural representation of the present utility model.
Embodiment
Be described below in detail embodiment of the present utility model, described embodiment's example is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by embodiment is described with reference to the drawings, be intended to explain the utility model, and can not be interpreted as restriction of the present utility model.In addition, if any term " first ", " second " only for describing object, and instruction or hint relative importance can not be interpreted as or imply the quantity indicating technical characteristics.
In the utility model, except as otherwise clear stipulaties and restriction, should go to understand as broad sense if any the term such as term " assembling ", " being connected ", " connection ", " fixing ", such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Also can be mechanical connection, also can be electrical connection; Can be directly be connected, also can be connected by intermediary, can be that two element internals are connected.For those of ordinary skills, the concrete meaning of above-mentioned term in the utility model can be understood as the case may be.
Below in conjunction with accompanying drawing, by being further described embodiment of the present utility model, make the technical solution of the utility model and beneficial effect thereof clearly, clearly.
As shown in Figure 1, a kind of LNG unloads measuring apparatus, comprise and unload liquid pipeline 7 and return line 1, described two ends of unloading liquid pipeline 7 are respectively first interface 7a and the second interface 7b, are provided with the first control valve 8, liquid phase quality flowmeter 10 and the second control valve 11 at the described liquid pipeline 7 that unloads successively from first interface 7a to the direction of the second interface 7b.Also be provided with knock out drum 9 described unloading on liquid pipeline 7, described knock out drum 9 is between the first control valve 8 and liquid phase quality flowmeter 10.Described knock out drum 9 is provided with gas returning port, the gas returning port of knock out drum is connected with separate lines 15, the other end of described separate lines 15 props up and is connected on concora crush pipeline 6, and the contact of separate lines 15 and concora crush pipeline 6, between gas phase mass flow meter 4 and the first contact 1c, described separate lines 15 is provided with the 7th control valve 16.Described 7th control valve 16 is pneumatic autocontrol valve.Also be provided with one-way valve 12 described unloading on liquid pipeline 7, described one-way valve 12 is between the second control valve 11 and the second interface 7b.
As shown in Figure 1, the two ends of described return line 1 are respectively the 3rd interface 1a and the 4th interface 1b, are provided with the 3rd control valve 3, first contact 1c and the second contact 1d in described return line 1 successively from the 3rd interface 1a to the direction of the 4th interface 1b.Described first contact 1c props up and is connected with concora crush pipeline 6, the other end of described concora crush pipeline 6 props up to be connected in and unloads on liquid pipeline 7, and concora crush pipeline 6 and unload liquid pipeline 7 contact between the first control valve 8 and first interface 7a, concora crush pipeline 6 is provided with the 4th control valve 5 and gas phase mass flowmenter 4.Described second contact 1d props up and is connected with precooling pipeline 13, the other end of described precooling pipeline 13 also props up to be connected in and unloads on liquid pipeline 7, and precooling pipeline 13 and unload liquid pipeline 7 contact between liquid phase quality flowmeter 10 and the second control valve 11, described precooling pipeline 13 is provided with the 5th control valve 14.
As shown in Figure 1, the present embodiment also comprises pressure piping 17, and described pressure piping 17 is provided with the 6th control valve 18.Described pressure piping 17, separate lines 15, concora crush pipeline 6 and return line 1 are equipped with drain, drain described in each is all provided with pressure-relief valve 2.Described first control valve 8, the 3rd control valve 3, the 4th control valve 5 and the 6th control valve 18 are manual control valve.Described second control valve 11 and the 5th control valve 14 are pneumatic autocontrol valve.
Claims (6)
1. a LNG unloads measuring apparatus, it is characterized in that: comprise and unload liquid pipeline (7) and return line (1), described two ends of unloading liquid pipeline (7) are respectively first interface (7a) and the second interface (7b), are provided with the first control valve (8), liquid phase quality flowmeter (10) and the second control valve (11) at the described liquid pipeline (7) that unloads successively from first interface (7a) to the direction of the second interface (7b), the two ends of described return line (1) are respectively the 3rd interface (1a) and the 4th interface (1b), the 3rd control valve (3) is provided with successively from the 3rd interface (1a) to the direction of the 4th interface (1b) in described return line (1), first contact (1c) and the second contact (1d), concora crush pipeline (6) is connected with upper of described first contact (1c), the other end of described concora crush pipeline (6) props up to be connected in and unloads on liquid pipeline (7), and concora crush pipeline (6) and the contact unloading liquid pipeline (7) are positioned between the first control valve (8) and first interface (7a), concora crush pipeline (6) is provided with the 4th control valve (5) and gas phase mass flowmenter (4), precooling pipeline (13) is connected with upper of described second contact (1d), the other end of described precooling pipeline (13) also props up to be connected in and unloads on liquid pipeline (7), and precooling pipeline (13) and the contact unloading liquid pipeline (7) are positioned between liquid phase quality flowmeter (10) and the second control valve (11), and described precooling pipeline (13) is provided with the 5th control valve (14).
2. LNG according to claim 1 unloads measuring apparatus, it is characterized in that: also comprise pressure piping (17), described pressure piping (17) is provided with the 6th control valve (18).
3. LNG according to claim 1 and 2 unloads measuring apparatus, it is characterized in that: described unloading on liquid pipeline (7), knock out drum (9) is also installed, described knock out drum (9) is positioned between the first control valve (8) and liquid phase quality flowmeter (10), described knock out drum (9) is provided with gas returning port, the gas returning port of knock out drum is connected with separate lines (15), the other end of described separate lines (15) props up and is connected on concora crush pipeline (6), and the contact of separate lines (15) and concora crush pipeline (6) is positioned between gas phase mass flow meter (4) and the first contact (1c), described separate lines (15) is provided with the 7th control valve (16).
4. LNG according to claim 3 unloads measuring apparatus, it is characterized in that: described 7th control valve (16) is pneumatic autocontrol valve.
5. LNG according to claim 4 unloads measuring apparatus, it is characterized in that: in described separate lines (15), concora crush pipeline (6) and return line (1), be equipped with drain, drain described in each be all provided with pressure-relief valve (2).
6. LNG according to claim 5 unloads measuring apparatus, it is characterized in that: be provided with one-way valve (12) described unloading on liquid pipeline (7), described one-way valve (12) is positioned between the second control valve (11) and the second interface (7b).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520558196.6U CN204756429U (en) | 2015-07-29 | 2015-07-29 | LNG metering device that unloads |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520558196.6U CN204756429U (en) | 2015-07-29 | 2015-07-29 | LNG metering device that unloads |
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| Publication Number | Publication Date |
|---|---|
| CN204756429U true CN204756429U (en) | 2015-11-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520558196.6U Withdrawn - After Issue CN204756429U (en) | 2015-07-29 | 2015-07-29 | LNG metering device that unloads |
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| CN (1) | CN204756429U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105020577A (en) * | 2015-07-29 | 2015-11-04 | 重庆耐德能源装备集成有限公司 | LNG unloading method capable of achieving accurate measurement and LNG unloading measurement device |
| CN105890687A (en) * | 2016-06-27 | 2016-08-24 | 河南中托力合化学有限公司 | Precision metering device for oil product unloading |
| CN111306440A (en) * | 2018-12-12 | 2020-06-19 | 张家港中集圣达因低温装备有限公司 | Liquid discharge metering device |
| CN111795293A (en) * | 2019-04-09 | 2020-10-20 | 马格纳斯泰尔汽车技术两合公司 | Storage tank for cryogenic liquefied gas |
-
2015
- 2015-07-29 CN CN201520558196.6U patent/CN204756429U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105020577A (en) * | 2015-07-29 | 2015-11-04 | 重庆耐德能源装备集成有限公司 | LNG unloading method capable of achieving accurate measurement and LNG unloading measurement device |
| CN105890687A (en) * | 2016-06-27 | 2016-08-24 | 河南中托力合化学有限公司 | Precision metering device for oil product unloading |
| CN111306440A (en) * | 2018-12-12 | 2020-06-19 | 张家港中集圣达因低温装备有限公司 | Liquid discharge metering device |
| CN111306440B (en) * | 2018-12-12 | 2022-02-01 | 张家港中集圣达因低温装备有限公司 | Liquid discharge metering device |
| CN111795293A (en) * | 2019-04-09 | 2020-10-20 | 马格纳斯泰尔汽车技术两合公司 | Storage tank for cryogenic liquefied gas |
| US11415084B2 (en) | 2019-04-09 | 2022-08-16 | Magna Steyr Fahrzeugtechnik Ag & Co Kg | Storage tank for cryogenic liquid gas |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20151111 Effective date of abandoning: 20170815 |
|
| AV01 | Patent right actively abandoned |