CN212456264U - Low-temperature single-tank full-vacuum gas-liquid separator - Google Patents
Low-temperature single-tank full-vacuum gas-liquid separator Download PDFInfo
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- CN212456264U CN212456264U CN202021271264.8U CN202021271264U CN212456264U CN 212456264 U CN212456264 U CN 212456264U CN 202021271264 U CN202021271264 U CN 202021271264U CN 212456264 U CN212456264 U CN 212456264U
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Abstract
The utility model discloses a low-temperature single-tank full vacuum gas-liquid separator, which comprises a first gas return pipeline, a second gas return pipeline, a main pipeline, a first liquid inlet pipeline, a second liquid inlet pipeline and a pneumatic valve; the first air return pipeline and the second air return pipeline are symmetrically arranged at the upper end part of the main pipeline, the first liquid inlet pipeline and the second liquid inlet pipeline are symmetrically arranged at the lower end part of the main pipeline, and the first liquid inlet pipeline and the second liquid inlet pipeline are symmetrically arranged at the lower end part of the main pipeline; the pneumatic valves are obliquely arranged on the first air return pipeline and the second air return pipeline respectively; the deflection angle range of the pneumatic valve is 15-30; the vacuum valve of the middle-low temperature single-tank full vacuum gas-liquid separator adopts the inclined design with a certain angle on the process layout, so that the U-shaped channel is closed to the horizontal U-shaped channel under the formation part in the gas return process, the liquid seal problem is essentially avoided, and the gas return efficiency of the plunger pump is improved; the gas-liquid separator pipelines are all designed in an inclined mode, and the gas return efficiency is improved.
Description
Technical Field
The utility model belongs to the technical field of new energy automobile hydrogen injection and specifically relates to a full vacuum vapour and liquid separator of low temperature single jar.
Background
In the operation process of the L-CNG gas station, the plunger pump needs to be started frequently, however, the failure of pressurizing the plunger pump is a frequently-occurring process problem, the root cause of the problem is that the air return of the plunger pump is not smooth, and some problems existing in the air return process of the plunger pump in the L-CNG gas station in the current market are mainly shown as follows:
1) the plunger pump return air and the gas-liquid separator return air are not independently separated, mutual air channeling interference is caused, a valve is vertically installed to cause local liquid seal, and finally the plunger pump return air is not smooth, and the pump cannot be normally started.
2) And because the air return is not smooth, the pump can be started by increasing a manual valve or a pneumatic valve to discharge the air in the air return pipeline, the symptoms are treated, the root causes are not treated, and economic loss is brought to owners.
3) And a pneumatic valve is designed on the liquid phase pipeline, and great potential safety hazards exist in plunger pump maintenance.
4) The structure does not have integrity, and the hoisting and the installation are inconvenient.
Based on the above-mentioned problem, this patent technique adopts novel structural design, optimizes the overall arrangement of technology pipeline and valve, solves local liquid seal problem, guarantees the smooth back-air of plunger from essence, realizes that the plunger pump zero release frequently starts.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a utility model aim at: aiming at the problems, the utility model provides a full vacuum gas-liquid separator of low temperature single-tank which has solved the problems that the air return of the plunger pump is not smooth and the pump can not be normally started in the prior art and the plunger pump is overhauled to have great potential safety hazard.
The scheme is realized as follows:
a low temperature single tank full vacuum gas liquid separator: the system comprises a first air return pipeline, a second air return pipeline, a main pipeline, a first liquid inlet pipeline, a second liquid inlet pipeline and a pneumatic valve; the first air return pipeline and the second air return pipeline are symmetrically arranged at the upper end part of the main pipeline, the first liquid inlet pipeline and the second liquid inlet pipeline are symmetrically arranged at the lower end part of the main pipeline, and the first liquid inlet pipeline and the second liquid inlet pipeline are symmetrically arranged at the lower end part of the main pipeline; and the pneumatic valves are obliquely arranged on the first air return pipeline and the second air return pipeline respectively.
Preferably, the deflection angle of the pneumatic valve is 15-30 degrees.
Preferably, the first liquid inlet pipeline and the second liquid inlet pipeline are provided with manual valves at corresponding positions.
Preferably, the first gas return pipeline and the first liquid inlet pipeline are arranged in a position matching manner, and the second gas return pipeline and the second liquid inlet pipeline are arranged in a position matching manner.
Preferably, a four-way pipe is arranged at the intersection of the first air return pipeline, the second air return pipeline and the main pipeline, the upper parts of the first air return pipeline, the second air return pipeline and the main pipeline are converged, a first output pipe is connected to the four-way pipe, and the first output pipe is communicated with the top of an external storage tank.
Preferably, a first input pipe is arranged on the main pipeline and communicated with the storage tank.
Preferably, the manual valve is disposed to be inclined, and an inclination angle of the manual valve and an inclination angle of the air-operated valve are set to be 15 to 30 °.
Preferably, the diameters of the first liquid inlet pipe and the second liquid inlet pipe are matched, and the diameters of the first air return pipe and the second air return pipe are matched; the size of the first liquid inlet pipe is not smaller than the diameter of the first gas return pipe.
The utility model provides a safe use method of gas-liquid separator, its concrete step is as follows:
the method comprises the following steps: respectively connecting the first air return pipeline and the first liquid inlet pipeline with an air return port and a liquid inlet of one plunger pump in a through manner, and respectively connecting the second air return pipeline and the second liquid inlet pipeline with an air return port and a liquid inlet of the other plunger pump in a through manner; connecting a first output pipe on the main pipeline with the top of the storage tank, and connecting a first input pipe of the main pipeline with the bottom of the storage tank;
step two: when the plunger pump is started, the pneumatic valve acts simultaneously, and air return flows along the inclined lower U-shaped flow passage in the pneumatic valve, so that the plunger pump can smoothly return air.
Step three: when the plunger pump breaks down, the manual valve on the liquid inlet pipeline of the plunger pump is manually closed, so that the pipeline is accurately closed, and meanwhile, the other plunger valve is normally output, so that the normal output of the high-pressure LNG is ensured.
To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:
1. the utility model provides a single jar vacuum gas-liquid separator of low temperature adopts the design of single jar to the double pump, and plunger pump return gas pipeline independently puts the design with vapour and liquid separator return gas pipeline, and the terminal gathers, and return gas mutually noninterference, not scurries, improves plunger pump operation in-process return gas efficiency greatly, realizes that the zero release can normally open the pump.
2. The vacuum valve of the middle-low temperature single-tank full vacuum gas-liquid separator adopts the inclined design with a certain angle on the process layout, so that the U-shaped channel is closed to the horizontal U-shaped channel under the formation part in the gas return process, the liquid seal problem is essentially avoided, and the gas return efficiency of the plunger pump is improved; the gas-liquid separator pipelines are all designed in an inclined mode, the stroke extending resistance is greatly reduced, and the gas return efficiency is improved.
3. The utility model discloses full vacuum vapour and liquid separator of low temperature single jar designs manual valve on LNG liquid phase pipeline on technology, designs the pneumatic valve on the gas phase pipeline, has avoidd the potential safety hazard that exists among the plunger pump maintenance process, and integral structural design can realize integral hoisting, transportation, installation.
Drawings
FIG. 1 is a schematic view of the overall axial measurement structure of the present invention;
FIG. 2 is a schematic side view of the whole structure of the present invention;
FIG. 3 is a schematic diagram illustrating the principle of the pneumatic valve of the present invention;
FIG. 4 is a schematic structural view of the U-shaped pipeline of the present invention disposed vertically;
FIG. 5 is a schematic structural view of the U-shaped pipeline of the present invention when it is set after rotating a certain angle;
the labels in the figure are: 1. a first gas return line; 2. a second return air line; 3. a main pipeline; 4. a first liquid inlet pipeline; 5. a second liquid inlet pipeline; 6. a pneumatic valve; 7. a four-way pipe; 8. a first input pipe; 9. a manual valve; 10. a first output pipe; 11. a low output end; 12. a high-inlet end; 13. and (4) a valve.
Detailed Description
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
Any feature disclosed in this specification (including any accompanying claims, abstract) may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the designated device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature.
Example 1
As shown in fig. 1 to 3, a low-temperature single-tank full vacuum air-liquid separator includes a first air return pipeline 1, a second air return pipeline 2, a main pipeline 3, a first liquid inlet pipeline 4, a second liquid inlet pipeline 5 and a pneumatic valve 6; the first air return pipeline 1 and the second air return pipeline 2 are symmetrically arranged at the upper end part of the main pipeline 3, the first liquid inlet pipeline 4 and the second liquid inlet pipeline 5 are symmetrically arranged at the lower end part of the main pipeline 3, and the first liquid inlet pipeline 4 and the second liquid inlet pipeline 5 are symmetrically arranged at the lower end part of the main pipeline 3; the pneumatic valves 6 are obliquely arranged on the first air return pipeline 1 and the second air return pipeline 2 respectively;
the first gas return pipeline 1 is matched with the first liquid inlet pipeline 4 in position, and the second gas return pipeline 2 is matched with the second liquid inlet pipeline 5 in position.
Based on the setting, with first return air pipeline 1 and first liquid inlet pipeline 4 respectively with the return-air mouth and the inlet through connection of plunger pump when using, with second return air pipeline 2 and second liquid inlet pipeline 5 respectively with the return-air mouth and the inlet through connection of another plunger pump, the plunger pump is the piston pump that prior art was used commonly, through the return-air mouth with the plunger pump with the inlet respectively with the first end connection of this device, makes liquid follow the output of liquid outlet pressurization.
However, in the prior art, as shown in fig. 3, when the plunger pump returns air, the air-liquid two-phase material enters the air-operated valve 6 from the air return port, and the liquid natural temperature is low, usually tens of degrees celsius below zero, while the valve internal sealing structure of the air-operated valve 6 is a high-inlet low-outlet structure, the high-inlet end 12 of the air-operated valve 6 is connected with the high-pressure end, and the low-outlet end 11 of the air-operated valve 6 is communicated with the plunger pump through a pipeline;
when the plunger pump returns air, the gas-liquid mixed medium is filled into the low inlet end of the pneumatic valve 6, the gas-liquid mixed medium impacts with the inner pipe wall of the plunger pump to force the gas-liquid mixed medium to flow in a downward turning mode, so that a local lower U-shaped channel is formed in the air returning process, low-temperature liquid substances are accumulated in the U-shaped channel to cause liquid seal, the air returning of the plunger pump is not smooth, the plunger pump returning efficiency is further influenced, the plunger pump cannot be normally started, and the problem is a common problem in the industry.
To above-mentioned problem, the solution of the majority, be provided with manual valve or pneumatic valve alone on plunger pump return air pipeline, when the plunger pump takes place the return air not smooth, through opening manual valve or pneumatic valve, discharge the medium outward, make pipeline intercommunication atmospheric pressure, it is unobstructed to make intraductal return air, such a way, can externally discharge the natural gas medium, the discharge of long-time many times also can cause great waste to the natural gas, to this not carrying out the improvement, still will be permanent extravagant, this is not conform to the principle of national energy-concerving and environment-protective, also bring unnecessary economic loss for the customer.
For convenience of describing the liquid seal situation, please refer to fig. 4 and 5, a pipe bent into a U shape is taken as an example, a mixed medium enters one end of a U-shaped pipe from one end of the pipe, and a liquid seal is formed by a liquid substance in a lower U-shaped structure due to a low temperature of the mixed medium, at this time, the mixed medium needs a great air pressure to pass through a liquid seal surface, and the inventor's idea is to gradually rotate a vertically arranged U-shaped pipe horizontally with a liquid flowing direction as an axis, so that the vertical U-shaped pipe gradually tends to be horizontal and is horizontal in a limit state;
in the limit state, the liquid deposited at the turning part is always positioned at the lower end part of the whole pipeline under the action of gravity, and an air return channel is reserved at the upper end part of the whole pipeline; when the U-shaped pipeline is gradually changed from vertical to horizontal, the height position of the deposition liquid level is gradually reduced, and along with the gradual reduction of the height of the deposition liquid level, the air pressure required by air return to penetrate through the liquid surface is gradually reduced, so that the air return is smoother and smaller compared with the vertical U-shaped pipeline.
Based on the principle, when the pneumatic valve 6 is combined and applied, please refer to fig. 3, when the low outlet end 11 of the pneumatic valve 6 is connected with the air return end of the plunger pump, the high inlet end 12 of the pneumatic valve 6 is communicated with the top of the storage tank through a pipeline; when the plunger pump returns air, the air flow enters the position of the low outlet end 11 of the pneumatic valve 6 from the pipeline, the air flow changes the flow direction downwards due to the blocking of the air flow and the pipe wall at the upper end part of the low outlet end 11, when the pneumatic valve 6 core acts to open the valve 13, the air and mixed medium air flow passes through the valve 13 again to flow upwards, and finally flows to the top position of the storage tank;
at this time, the gas-liquid mixed medium flows in the whole from the low outlet end 11 to the high inlet end 12 of the air-operated valve 6, as shown in fig. 3; and a lower U-shaped air flow is formed, because the liquid part in the mixed air flow is low-temperature liquefied natural gas, the temperature is usually minus dozens of degrees centigrade, when the mixed medium flows along the lower U-shaped flow direction, the liquefied natural gas can be accumulated at the low inlet end of the pneumatic valve 6, a liquid seal can be quickly formed, the air return of the plunger pump is not smooth, and the pneumatic performance of the plunger pump is influenced.
Along with the principle of the U-shaped pipeline, the original vertical arrangement of the pneumatic valve 6 is changed into the arrangement of deflecting a certain angle, and the deflecting angle ranges from 15 degrees to 30 degrees;
although, according to the theory of the aforementioned U-shaped pipeline, the larger the angle of the pneumatic valve 6 deflecting to the horizontal direction is, the lower the height of the deposition liquid level is, and the smaller the pressure required for air return at this time is, theoretically, the most unobstructed the air return is when the pneumatic valve 6 deflects to the horizontal direction; however, the inventor has found that, after many experiments in reality, when the deflection angle of the air-operated valve 6 is larger, the degree of condensation and frost formation on the air-operated valve 6 is higher, which affects the operation of the air-operated valve 6 and also impairs the service life of the air-operated valve 6;
through the continuous trial and test of the inventor, the frosting degree is small and the air return is smooth when the deflection angle is 15-30 degrees, and especially when the deflection angle is 15 degrees, the effect is optimal.
A four-way pipe 7 is arranged at the intersection of the first air return pipeline 1, the second air return pipeline 2 and the main pipeline 3, the upper parts of the first air return pipeline 1, the second air return pipeline 2 and the main pipeline 3 are converged, a first output pipe 10 is connected to the four-way pipe 7, the first output pipe 10 is communicated with the top of an external storage tank, and converged gas is discharged to the top of the storage tank through the first output pipe 10;
a first input pipe 8 is arranged on the main pipeline, the first input pipe 8 is communicated with the storage tank, the liquid natural gas in the storage tank is output to the plunger pump through the first input pipe 8, and the liquid natural gas is pressurized by the plunger pump and then is output outwards;
and manual valves 9 are arranged at corresponding positions of the first liquid inlet pipeline 4 and the second liquid inlet pipeline 5, the manual valves 9 are arranged in an inclined mode, the inclined angle of the manual valves 9 is the same as that of the air-operated valve 6, and the inclined angle is 15-30 degrees.
Can overhaul the plunger pump through manual valve 9, when single plunger pump broke down, can be accurate carry out artificial closure with the trouble place pipeline, reduced the system malfunction and to the wrong control of pipeline, guaranteed the security of maintenance.
In the prior art, although a whole set of control system is often adopted to control the opening or closing of the pipeline, so that the pipeline is more intelligent, the whole systematic control is easy to cause misoperation in a complex environment, particularly, the liquid is pumped in a liquid inlet pipeline to minus dozens of degrees of cryogenic liquid, so that electronic devices are influenced to a certain degree, particularly, when the pipeline needs to be opened for maintenance, partial devices are usually abnormal in function, and at the moment, the pipeline is systematically controlled to be opened and closed, so that the risk of misoperation is great. The liquid in the pipeline is cryogenic liquid with the temperature of minus dozens of facilities, and the cryogenic liquid directly contacts the human body, so that the human body is greatly injured, and the maintenance risk of maintainers is increased.
The diameters of the first liquid inlet pipe and the second liquid inlet pipe are matched, and the diameters of the first air return pipe and the second air return pipe are matched; the size of the first liquid inlet pipe is not smaller than the diameter of the first gas return pipe.
The novel structure adopts the design theory of single jar to the design of double pump, according to LNG physical characteristic, has improved LNG liquid source quality greatly. The plunger pump gas return pipeline and the gas-liquid separator gas return pipeline are independently arranged on the top, the terminals are gathered, gas return is not interfered with each other, the gas return efficiency in the operation process of the plunger pump is greatly improved, the technical problem that the gas return of the plunger pump is not smooth is fundamentally solved, and the normal starting of the plunger pump can be realized with zero emission.
In addition, the vacuum valve of the low-temperature single-tank full vacuum air-liquid separator adopts the design concept of an inclined valve in the process layout, so that a local lower U-shaped channel formed in the air return process is closed to a horizontal U-shaped channel, the liquid seal problem is essentially avoided, and the air return efficiency of the plunger pump is improved; the gas-liquid separator pipelines are all designed in an inclined mode, the stroke extending resistance is greatly reduced, and the gas return efficiency is improved.
In the process, the manual valve 9 is designed on an LNG liquid phase pipeline, and the pneumatic valve 6 is designed on a gas phase pipeline, so that potential safety hazards in the process of plunger pump maintenance are avoided. The gas-liquid separator adopts an integral and full-vacuum design, improves the hoisting, transporting and assembling efficiency, reduces the extended-range cold loss of the low-temperature meson, and improves the energy utilization rate.
The utility model provides a safe use method of full vacuum gas-liquid separator of low temperature single jar, its concrete step is as follows:
the method comprises the following steps: the first air return pipeline 1 and the first liquid inlet pipeline 4 are respectively communicated with an air return port and a liquid inlet of a plunger pump, and the second air return pipeline 2 and the second liquid inlet pipeline 5 are respectively communicated with an air return port and a liquid inlet of another plunger pump; connecting a first output pipe 10 on the main pipeline 3 with the top of the storage tank, and connecting a first input pipe 8 of the main pipeline 3 with the bottom of the storage tank;
step two: when the plunger pump is started, the pneumatic valve 6 acts at the same time, and air return flows along the inclined lower U-shaped flow passage in the pneumatic valve 6, so that the plunger pump can smoothly return air.
Step three: when the plunger pump breaks down, the manual valve 9 on the liquid inlet pipeline of the plunger pump is manually closed, so that the pipeline is accurately closed, and meanwhile, the other plunger valve is normally output, so that the normal output of the high-pressure LNG is ensured.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. The utility model provides a full vacuum gas-liquid separator of low temperature single-tank which characterized in that: the system comprises a first air return pipeline, a second air return pipeline, a main pipeline, a first liquid inlet pipeline, a second liquid inlet pipeline and a pneumatic valve; the first air return pipeline and the second air return pipeline are symmetrically arranged at the upper end part of the main pipeline, the first liquid inlet pipeline and the second liquid inlet pipeline are symmetrically arranged at the lower end part of the main pipeline, and the first liquid inlet pipeline and the second liquid inlet pipeline are symmetrically arranged at the lower end part of the main pipeline; and the pneumatic valves are obliquely arranged on the first air return pipeline and the second air return pipeline respectively.
2. The cryogenic single tank full vacuum gas-liquid separator of claim 1 wherein: the deflection angle range of the pneumatic valve is 15-30 degrees.
3. The cryogenic single tank full vacuum gas-liquid separator of claim 1 wherein: and the first liquid inlet pipeline and the second liquid inlet pipeline are provided with manual valves at corresponding positions.
4. The cryogenic single tank full vacuum gas-liquid separator of claim 1 wherein: the first air return pipeline and the first liquid inlet pipeline are arranged in a position matching mode, and the second air return pipeline and the second liquid inlet pipeline are arranged in a position matching mode.
5. The cryogenic single tank full vacuum gas-liquid separator of claim 4 wherein: the four-way pipe is arranged at the intersection of the first air return pipeline, the second air return pipeline and the main pipeline, the upper parts of the first air return pipeline, the second air return pipeline and the main pipeline are converged, a first output pipe is connected to the four-way pipe, and the first output pipe is communicated with the top of an external storage tank.
6. The cryogenic single tank full vacuum gas-liquid separator of claim 5 wherein: the main pipeline is provided with a first input pipe, and the first input pipe is communicated with the storage tank.
7. A cryogenic single tank full vacuum gas-liquid separator as claimed in claim 3 wherein: the manual valve is arranged in an inclined mode, and the inclination angle of the manual valve and the inclination angle of the pneumatic valve are set to be 15-30 degrees.
8. The cryogenic single tank all vacuum gas-liquid separator of claim 7 wherein: the diameters of the first liquid inlet pipe and the second liquid inlet pipe are matched, and the diameters of the first air return pipe and the second air return pipe are matched; the size of the first liquid inlet pipe is not smaller than the diameter of the first gas return pipe.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021271264.8U CN212456264U (en) | 2020-07-01 | 2020-07-01 | Low-temperature single-tank full-vacuum gas-liquid separator |
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| CN202021271264.8U CN212456264U (en) | 2020-07-01 | 2020-07-01 | Low-temperature single-tank full-vacuum gas-liquid separator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111678037A (en) * | 2020-07-01 | 2020-09-18 | 优普能源技术有限公司 | Low-temperature single-tank full-vacuum gas-liquid separator |
| CN115468111A (en) * | 2022-08-30 | 2022-12-13 | 赵海丽 | Novel LNG/L-CNG filling station plunger pump sled |
-
2020
- 2020-07-01 CN CN202021271264.8U patent/CN212456264U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111678037A (en) * | 2020-07-01 | 2020-09-18 | 优普能源技术有限公司 | Low-temperature single-tank full-vacuum gas-liquid separator |
| CN115468111A (en) * | 2022-08-30 | 2022-12-13 | 赵海丽 | Novel LNG/L-CNG filling station plunger pump sled |
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Address after: No. 4, workshop 1, floor 1, unit 1, building 1, No. 1888, Checheng West Third Road, Chengdu Economic and Technological Development Zone (Longquanyi District), Sichuan 610000 Patentee after: Youjiete clean energy Co.,Ltd. Patentee after: YOUJIETE ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. Address before: Room 101, No.10, No.117, Nansan Road, Chengdu Economic and Technological Development Zone (Longquanyi District), Sichuan 610000 Patentee before: EUP Energy Technology Co.,Ltd. Patentee before: YOUJIETE ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. |
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