CN210034744U - Pipeline precooling system - Google Patents
Pipeline precooling system Download PDFInfo
- Publication number
- CN210034744U CN210034744U CN201920502470.6U CN201920502470U CN210034744U CN 210034744 U CN210034744 U CN 210034744U CN 201920502470 U CN201920502470 U CN 201920502470U CN 210034744 U CN210034744 U CN 210034744U
- Authority
- CN
- China
- Prior art keywords
- pipeline
- line
- medium
- precooling
- cooling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The utility model provides a pipeline precooling system. The pipeline precooling system includes a cryogenic storage tank, a transfer line, a compressor, and a booster line. One end of the transmission pipeline is communicated with the accommodating cavity of the low-temperature storage tank, and the other end of the transmission pipeline is connected with external equipment. The compressor is provided with an air inlet end, the air inlet end is communicated with the accommodating cavity, and the compressor is used for compressing the gaseous first medium input from the air inlet end to form a second medium; one end of the pressurization pipeline is connected with the compressor, the other end of the pressurization pipeline is communicated with the transmission pipeline, and the pressurization pipeline is used for transmitting the second medium into the transmission pipeline so as to pre-cool the transmission pipeline. When the high-pressure second medium is introduced into the transmission pipeline, the second medium can be quickly vaporized, so that a strong driving force is generated in the transmission pipeline, the resistance caused by a pipeline path, a liquid plug and the like in the pipeline is overcome, and the purpose of precooling the transmission pipeline is achieved.
Description
Technical Field
The utility model relates to a low temperature medium carries the field, in particular to pipeline precooling system.
Background
At present, when transporting low-temperature media, such as low-temperature liquefied hydrocarbons, by sea, the low-temperature media on the ship needs to be transported to a low-temperature storage tank through an unloading pipeline. When the low-temperature medium is unloaded, the pipeline of the ship must be precooled before unloading to avoid overlarge pipeline stress caused by impact of the low temperature of the material on the pipeline during unloading. The precooling operation of the ship unloading pipeline is directly related to the safety of the ship unloading system.
However, in practical applications, since the cryogenic tank is far from the ship unloading dock and needs to pass through a plurality of pipe racks with large height and low drop along the way, the precooling process of the ship unloading pipeline in the prior art is to pre-cool the ship unloading pipeline by conveying part of the cryogenic medium pre-stored in the cryogenic tank into the ship unloading pipeline. However, the low-temperature medium is gradually vaporized in the flowing process of the ship unloading pipeline, and the vaporized gas is gathered at the high point of the ship unloading pipeline, so that a liquid column is formed in the vertical pipe at the pipeline climbing section, and a gas-liquid column with alternating gas and liquid is formed in the ship unloading pipeline, which causes the increase of the flowing resistance of the low-temperature medium in the pipeline, thereby the precooling flow rate cannot be increased, and the precooling operation effect is poor.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a pipeline precooling system aims at improving the ability of overcoming the flow resistance of precooling system to improve the precooling effect.
In order to solve the technical problem, the utility model adopts the following technical scheme:
the utility model provides a pipeline precooling system, include:
the low-temperature storage tank is provided with an accommodating cavity for accommodating a first medium;
one end of the transmission pipeline is communicated with the accommodating cavity, the other end of the transmission pipeline is connected with external equipment, and the transmission pipeline is used for transmitting the first medium between the low-temperature storage tank and the external equipment;
the compressor is provided with an air inlet end, the air inlet end is communicated with the accommodating cavity, the compressor is used for compressing the gaseous first medium input from the air inlet end to form a second medium, and the pressure of the second medium is higher than that of the first medium; and
and one end of the pressurization pipeline is connected with the compressor, the other end of the pressurization pipeline is communicated with the transmission pipeline, and the pressurization pipeline is used for transmitting the second medium into the transmission pipeline so as to precool the transmission pipeline.
Optionally, the pipeline pre-cooling system further comprises a condenser and a condensate tank connected to the condenser;
the condenser is connected with the compressor to condense the second medium into a liquid state; the condensate tank is used for storing the second medium in a liquid state.
Optionally, the pipeline pre-cooling system further comprises a pre-cooling pipeline; one end of the precooling pipeline is communicated with the accommodating cavity, and the other end of the precooling pipeline is connected with the transmission pipeline; the pre-cooling pipeline is communicated with the transmission pipeline to form a pre-cooling channel;
the pressurization pipeline is connected with the precooling pipeline, and the pressurization pipeline, the precooling pipeline and the transmission pipeline are sequentially connected to form a pressurization channel.
Optionally, the pre-cooling pump has a suction port and a discharge port, the suction port is communicated with the accommodating cavity, and the discharge port is connected with the pre-cooling pipeline;
the pre-cooling pump is used for pumping the first medium in the low-temperature storage tank into the pre-cooling channel when the pre-cooling channel is opened.
Optionally, a connection point of the pressurization line and the pre-cooling line is a first connection point;
a first control valve is arranged on the precooling pipeline and positioned between the first connecting point and the low-temperature storage tank, and the first control valve is used for controlling the on-off of the precooling channel;
a second control valve is arranged on the pressurization pipeline and used for controlling the shutoff of the pressurization channel;
and the precooling channel and the pressurization channel are alternately conducted by adjusting the working states of the first control valve and the second control valve.
Optionally, the pipeline precooling system further comprises a controller, the first control valve is a pneumatic valve or an electric valve, and the second control valve is an electric valve or a pneumatic valve; the controller is electrically connected with the first control valve and the second control valve;
the first control valve and the second control valve are alternately opened under the control of the controller.
Optionally, the pipeline precooling system further comprises at least one air pressure detection device, and at least one of the low-temperature storage tank, the pressurization pipeline and the precooling pipeline is provided with the air pressure detection device.
Optionally, the booster pipeline is a metal pipe, and a heat insulating layer is wrapped outside the booster pipeline.
Optionally, the compressor has an air outlet, and the air outlet is connected with the condenser;
the pipeline precooling system further comprises a purging pipeline, one end of the purging pipeline is connected with the gas outlet, and the other end of the purging pipeline is connected with the pressurizing pipeline.
Optionally, a connection between the purge line and the pressurization line is a second connection point, and a third control valve is arranged on the purge line and located between the second connection point and the compressor air outlet.
According to the above technical scheme, the beneficial effects of the utility model are that:
the technical scheme of the utility model is provided with a compressor and a pressurizing pipeline, wherein the compressor is used for compressing gaseous first medium to generate high-pressure second medium; one end of the booster pipeline is connected with the compressor, the other end of the booster pipeline is communicated with the transmission pipeline, and the second medium is transmitted into the transmission pipeline from the booster pipeline so as to pre-cool the transmission pipeline. Since the pressure of the second medium is greater than the pressure of the first medium; therefore, when the high-pressure second medium is introduced into the transmission pipeline, the second medium can be quickly vaporized, so that a strong driving force is generated in the transmission pipeline, the resistance caused by a pipeline path, a liquid plug and the like in the pipeline is overcome, the fluency of the liquefied hydrocarbon flowing in the transmission pipeline during precooling operation is improved, the precooling effect is further improved, and the purpose of precooling the transmission pipeline is achieved.
Drawings
FIG. 1 is a schematic diagram of an embodiment of a line pre-cooling system of the present invention;
fig. 2 is a schematic diagram of another embodiment based on fig. 1.
The reference numerals are explained below:
10. a low-temperature storage tank; 20. a transfer line; 30. a compressor; 40. a booster line; 31. a condenser; 32. a condensate tank; 33. a flash tank; 50. a pre-cooling line; 51. a pre-cooling pump; 60. purging the line; 52. a first control valve; 41. a second control valve; 61. and a third control valve.
Detailed Description
Exemplary embodiments that embody features and advantages of the present invention will be described in detail in the following description. It is to be understood that the invention is capable of other and different embodiments and its several details are capable of modification without departing from the scope of the invention, and that the description and drawings are to be regarded as illustrative in nature and not as restrictive.
For further explanation of the principles and construction of the present invention, reference will now be made in detail to the preferred embodiments of the present invention, which are illustrated in the accompanying drawings.
The utility model provides a pipeline precooling system. Referring to fig. 1, the line pre-cooling system includes a cryogenic storage tank 10, a transfer line 20, a compressor 30, and a booster line 40. The low-temperature storage tank 10 is provided with an accommodating cavity for accommodating a first medium; one end of the transmission pipeline 20 is communicated with the accommodating cavity, the other end of the transmission pipeline is connected with external equipment, and the transmission pipeline 20 is used for transmitting a first medium between the low-temperature storage tank 10 and the external equipment; the compressor 30 is provided with an air inlet end, the air inlet end is communicated with the accommodating cavity, and the compressor 30 is used for compressing gaseous first media input from the air inlet end to form second media; one end of the booster line 40 is connected to the compressor 30 and the other end is in communication with the transfer line 20, the booster line 40 being used for transferring the second medium into the transfer line 20 for pre-cooling the transfer line 20.
In the scheme, the pipeline pre-cooling system is used for pre-cooling the transmission pipeline 20 to reduce the temperature of the transmission pipeline 20, so that vaporization is reduced when the subsequent first medium is transmitted between the external equipment and the low-temperature storage tank 10, and the transmission pipeline 20 is prevented from being damaged due to large stress of the low-temperature medium with too low temperature on the transmission pipeline 20.
In this embodiment, the first medium is a low-temperature medium, and specifically, the first medium may be in a liquid state, a gas state, or a gas-liquid mixed state. The first medium, after being compressed by the compressor 30, forms a second medium. It can be seen that the second medium is essentially the form of the first medium in the high pressure state.
When the first medium is in a liquid state, the low-temperature first medium, which is a container for storing the first medium, may have a BOG (Boil-Off Gas) phenomenon in the low-temperature storage tank 10, and thus the low-temperature storage tank 10 may have the first medium in a gaseous state. The compressor 30 compresses the gaseous first medium formed by evaporation to form the high-pressure second medium. It should be noted here that the high-pressure state of the second medium is relative to the pressure of the first medium.
In the scheme, the compressor 30 is utilized to absorb the gaseous first medium in the low-temperature storage tank 10 on one hand, so that the overhigh pressure in the low-temperature storage tank 10 is prevented; the compressor 30, on the other hand, compresses the first medium in the gaseous state to produce a second medium; the pressure of the second medium is higher than the pressure of the first medium. After the second medium with higher pressure is introduced into the transfer line 20 through the pressurization line 40, the second medium rapidly expands in the transfer line 20, so that a larger driving force is generated, and the larger driving force flows in the transfer line 20, so that the resistance in the line due to a line path, a liquid slug and the like can be overcome, and finally the second medium returns to the low-temperature storage tank 10 along the transfer line 20, thereby pre-cooling the transfer line 20.
In a specific practical test, the first medium is liquefied hydrocarbon, and the low-pressure liquefied hydrocarbon stored in the cryogenic tank 10 is at a temperature of about-101 ℃ and a pressure of not higher than 0.03 MPa. The liquid liquefied hydrocarbon generated by compression and reliquefaction has the temperature of about-38 ℃ and higher pressure, and can reach 1.45-1.6 MPa. Therefore, when entering the transfer pipeline 20, the high-pressure liquid liquefied hydrocarbon is rapidly vaporized to form a gaseous or gas-liquid mixed liquefied hydrocarbon, and then a large driving force can be generated in the transfer pipeline 20, so that the flow resistance caused by various external factors in the transfer pipeline 20 is effectively overcome, the fluency of the liquefied hydrocarbon flowing in the transfer pipeline 20 during the precooling operation is improved, and the precooling effect is further improved.
The technical scheme of the utility model is through setting up compressor 30 and booster line 40, wherein compressor 30 is used for compressing gaseous first medium in order to produce the high-pressure second medium; one end of the booster line 40 is connected to the compressor 30 and the other end is in communication with the transfer line 20, and the second medium is transferred from the booster line 40 into the transfer line 20 to pre-cool the transfer line 20. Since the pressure of the second medium is greater than the pressure of the first medium; therefore, when the high-pressure second medium is introduced into the transfer line 20, the second medium can be rapidly vaporized, so that a strong driving force is generated in the transfer line 20, resistance caused by a line path, a liquid slug and the like in the line is overcome, fluency of the liquefied hydrocarbon flowing in the transfer line 20 during the pre-cooling operation is improved, and a pre-cooling effect is further improved, thereby achieving the purpose of pre-cooling the transfer line 20.
The present invention will be described in more detail below. The first medium is a low-temperature liquid medium, and may be, for example, liquid ammonia, liquefied hydrocarbon (e.g., ethylene, ethane, liquefied petroleum gas, etc.), liquefied natural gas, etc., and in the following examples, the first medium is a low-temperature liquid liquefied hydrocarbon, and the second medium is a high-pressure liquefied hydrocarbon.
Referring to fig. 1, a transmission line 20 has one port for connecting external devices and one end connected to the cryogenic tank 10. It should be noted here that the external device may be a storage device in a cargo ship docked at the quay, or may be a pipe connected to the storage device. In particular, the transfer line 20 is laid between the dock and the cryogenic tank 10, and the liquefied hydrocarbon may be transferred from the dock to the cryogenic tank 10 or from the cryogenic tank 10 to the dock. In the following examples, the unloading of liquefied hydrocarbons (i.e. the transfer of the first medium from the quay to the cryogenic tank 10) is illustrated as an example.
In another embodiment, the air inlet of the compressor 30 is not connected to the cryogenic storage tank 10, but is connected to another storage tank for liquefied hydrocarbons, especially when both the compressor 30 and the storage tank are flexibly movable, which can make the position of the compressor 30 relative to the transfer line 20 more flexible, and can improve the flexibility of the pre-cooling operation.
The detailed structure and operation principle of the compressor 30 can be referred to the prior art, and will not be described herein. In the present embodiment, the gas inlet end of the compressor 30 absorbs the gaseous liquefied hydrocarbons in the cryogenic storage tank 10, and the gaseous liquefied hydrocarbons are compressed by the compression assembly of the compressor 30 to form gaseous liquefied hydrocarbons with high pressure.
Further, the pipeline precooling system further comprises a condenser 31 and a condensate tank 32 connected with the condenser 31; the condenser 31 is connected to the compressor 30, and the high-pressure gaseous second medium output from the compressor is condensed into a liquid second medium after passing through the condensate tank 32. The condensate tank 32 is also used to store the second medium in a liquid state. The second medium in liquid state facilitates the transport of the booster line 40 and has a smaller volume compared to the gaseous state, so that the cross-sectional area of the booster line 40 can be reduced.
The booster line 40 transfers liquid high pressure liquefied hydrocarbon between the compressor 30 and the transfer line 20. The booster line 40 may have a smaller pipe diameter relative to the pipe diameter of the transfer line 20. In an alternative embodiment, the pressure inlet line 40 is a metal pipe and the pressure inlet line 40 is externally wrapped with an insulating layer. The heat insulating layer may be formed by wrapping a heat insulating material around the pressure increasing line 40, or wrapping a vacuum heat insulating structure around the pressure increasing line 40.
Based on the above analysis, the high-pressure liquefied hydrocarbon enters the transfer line 20 through the pressurization line 40, and then returns to the cryogenic tank 10 in a gaseous state, a liquid state, or a gas-liquid mixed state. The compressor 30 further absorbs and compresses the liquefied hydrocarbon gas in the cryogenic storage tank 10, thereby forming a circulation path. In the application, in order to avoid the situation that the liquefied hydrocarbons cannot be completely introduced into the pressurization pipeline 40 due to the large amount of liquefied hydrocarbons in the low-temperature storage tank 10, the pipeline precooling system is further provided with the flash tank 33, and the flash tank 33 is connected between the condensate tank 32 and the low-temperature storage tank 10, so that when a large amount of liquid hydrocarbons are stored in the condensate tank 32, the liquid hydrocarbons can be recovered to the low-temperature storage tank 10 through the flash tank 33, and the waste of energy is reduced.
Based on the above embodiments, in order to further improve the precooling effect of the pipeline precooling system of the present application, in particular, the precooling temperature of the transfer pipeline 20 is made lower. Thus, in this arrangement, the line pre-cooling system further includes a pre-cooling line 50. One end of the pre-cooling pipeline 50 is communicated with the accommodating cavity, and the other end is connected with the transmission pipeline 20; the pre-cooling pipeline 50 is communicated with the transmission pipeline 20 to form a pre-cooling channel; booster line 40 is connected to pre-cooling line 50, booster line 40, pre-cooling line 50, transfer line 20 being connected in sequence to form a booster channel.
The pre-cooling line 50 is capable of transferring the low-temperature liquefied hydrocarbon in the cryogenic tank 10 to the transfer line 20, and since the temperature of the liquefied hydrocarbon from the cryogenic tank 10 is very low, the temperature in the line through which the liquefied hydrocarbon passes can be rapidly reduced. Further, to facilitate the removal of the cryogenic liquefied hydrocarbon from the cryogenic tank 10, the rate of cryogenic liquefied hydrocarbon entering the pre-cooling line 50 is also increased. The pipeline precooling system further comprises a precooling pump 51, the precooling pump 51 can be arranged in the low-temperature storage tank 10 or outside the low-temperature storage tank 10, the precooling pump 51 is provided with a suction inlet and a discharge outlet, the suction inlet is communicated with the containing cavity, the discharge outlet is connected with the precooling pipeline 50, and the precooling pump 51 is used for pumping low-temperature liquefied hydrocarbon in the low-temperature storage tank 10 into the precooling channel when the precooling channel is opened.
The pre-cooling pump 51 may be an existing vane pump, such as a centrifugal pump. In a specific practical test, the outlet pressure of the pre-cooling pump 51 is 0.58-0.60MPa, and it can be seen that the pressure of the low-temperature liquid liquefied hydrocarbon output by the pre-cooling pump 51 is much less than the pressure (1.45-1.6MPa) of the high-pressure liquid liquefied hydrocarbon after compression and condensation.
As is clear from the analysis of the background art, since the pressure of the cryogenic liquefied hydrocarbon discharged from the cryogenic tank 10 is low, a gas-liquid column with alternating gas and liquid phases is likely to be generated in the ascending section of the pre-cooling line 50 or the transfer line 20. However, since the pressurized line 40 outputs the liquefied hydrocarbon in the high-pressure liquid state into the pre-cooling line 50 in the present embodiment, the liquefied hydrocarbon in the high-pressure liquid state enters the pre-cooling line 50 to be rapidly vaporized; on one hand, the liquid plug formed in the precooling channel can be conducted, and the resistance caused by a pipeline path is overcome; on the other hand, the circulation speed of the low-temperature liquid liquefied hydrocarbon in the precooling channel can be promoted, so that the precooling speed is increased.
When the pipeline precooling system is applied, a precooling channel and a precooling pump 51 can be used firstly, and part of low-temperature liquid liquefied hydrocarbon is pumped into the precooling channel firstly, so that a certain amount of low-temperature liquid liquefied hydrocarbon is stored in the precooling channel, and the temperature of the transmission pipeline 20 is reduced; then, the high-pressure liquefied hydrocarbon passing through the compressor 30 and the condenser 31 is used for high-pressure precooling through a pressurizing channel, so that the precooling speed is increased. According to the technical scheme, the material quantity of liquefied hydrocarbon contained in the transmission pipeline 20 and the precooling pipeline 50 is reduced, so that the power consumption of the compressor 30 for recovering the gaseous liquefied hydrocarbon is reduced; meanwhile, the precooling time of the pipeline is greatly shortened, and the purpose of smoothly unloading the ship can be achieved at different environmental temperatures. And to the pipeline near the great pipe support of long distance height drop, this application scheme can reduce alternate gas-liquid column and flow, avoids the vibration that the pipeline produced, the security of effectual assurance pipe support.
Based on this, in order to reach and compromise precooling effect and precooling speed, in this scheme, set up precooling passageway and pressure boost passageway and open in turn. For example, first, the pre-cooling channel is opened, so that the pre-cooling pump 51 pumps a part of the low-temperature liquid liquefied hydrocarbon into the pre-cooling channel to pre-cool the transmission pipeline; and then closing the pre-cooling channel and opening the pressurizing channel to input the high-pressure liquefied hydrocarbon into the transmission pipeline. The pressurization path is then closed again and the pre-cooling path is opened … … in an alternating manner to further enhance the pre-cooling effect on the transfer line 20.
Referring to fig. 2, further, in order to facilitate the control of the pre-cooling channel and the pressurization channel, the connection point of the pressurization line 40 and the pre-cooling line 50 is a first connection point; a first control valve 52 is arranged on the pre-cooling pipeline 50, the first control valve 52 is positioned between the first connecting point and the low-temperature storage tank 10, and the first control valve 52 is used for controlling the on-off of a pre-cooling channel; a second control valve 41 is arranged on the pressurization pipeline 40, and the second control valve 41 is used for controlling the shutoff of the pressurization channel; the pre-cooling passage and the pressurization passage are alternately conducted by adjusting the operating states of the first control valve 52 and the second control valve 41.
The first control valve 52 and the second control valve 41 may be mechanical valves requiring manual operation, or may be electric valves, pneumatic valves, or the like. Alternatively, the first control valve 52 and the second control valve 41 are both valves having a plurality of opening degrees, so that the opening and closing control and the flow rate size control of the first control valve 52 and the second control valve 41 can be realized.
Furthermore, the pipeline precooling system also comprises a controller, and the controller can be a single chip microcomputer or an MCU or an existing control chip. The first control valve 52 is an air-operated valve or an electric-operated valve, and the second control valve 41 is an electric-operated valve or an air-operated valve; the controller is electrically connected with the first control valve 52 and the second control valve 41; the first control valve 52 and the second control valve 41 are alternately opened under the control of the controller.
The pipeline precooling system further comprises at least one air pressure detection device, and at least one of the low-temperature storage tank 10, the pressurization pipeline 40 and the precooling pipeline 50 is provided with the air pressure detection device. Taking the example of providing the gas pressure detection device in the cryogenic tank 10 as an example, since the gas in the pressurization channel and the pre-cooling channel is finally output to the cryogenic tank 10, when the gas pressure detection device detects that the pressure in the cryogenic tank 10 is higher than the preset value, the second control valve 41 can be controlled to be closed, so as to reduce the amount of gas finally entering the cryogenic tank 10.
After the unloading of the liquefied hydrocarbon is completed, the control valve of the dock is closed after the oil transfer arm is purged by the onboard compressor 30, and the transfer line 20 is filled with the low-temperature liquefied hydrocarbon, which is heated and expanded to be gasified by the ambient temperature in the related art, and then slowly returns to the low-temperature storage tank 10. However, if the cryogenic storage tank 10 is far from the ship unloading dock, the time for the cryogenic liquefied hydrocarbon filled in the transfer pipeline 20 to expand or gasify back into the tank is long, and the amount of BOG (Boil-off gas) generated due to cold loss is large, and further, the amount of electric energy required for compressing and condensing the cryogenic liquid by the compressor 30 to recover the cryogenic liquid is also large, which results in energy waste.
Based on this, energy waste and time are required for removing the liquefied hydrocarbons in the transfer line 20 and the pre-cooling line 50 after the ship is unloaded. Referring to fig. 1, in the embodiment of the present invention, the compressor 30 has an air outlet connected to the condenser 31; the line pre-cooling system further comprises a purge line 60, one end of the purge line 60 is connected to the gas outlet, and the other end is connected to the pressurization line 40. The specific pressure value of the high-pressure liquefied hydrocarbon gas discharged from the two-stage gas outlet of the compressor 30 is determined according to the type and model of the selected compressor 30. The high pressure liquefied hydrocarbon gas thus purges booster line 40, pre-cooling line 50, transfer line 20 via purge line 60, thereby reducing or eliminating residual amounts of liquefied hydrocarbon in booster line 40, pre-cooling line 50, transfer line 20.
Referring to fig. 2, in order to control the purge line 60 conveniently, in the present embodiment, a connection point between the purge line 60 and the pressure increasing line 40 is set as a second connection point, a third control valve 61 is disposed on the purge line 60, and the third control valve 61 is located between the second connection point and the air outlet of the compressor 30. Thus, by controlling the third control valve 61, the make-and-break of the boost line 40 can be controlled.
The two-stage outlet gas of the compressor 30 is introduced to pressurize the pre-cooling pipeline 50 and the transmission pipeline 20, so that power is provided for liquefied hydrocarbon in the pre-cooling pipeline 50 and the transmission pipeline 20, the time for returning the liquefied hydrocarbon to the tank is accelerated, the cold loss is effectively reduced, the amount of BOG generated by the cold loss is reduced, and the power consumption for compressing, condensing and recovering the liquefied hydrocarbon by the compressor 30 is reduced, so that the operation cost is further reduced.
While the present invention has been described with reference to several exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.
Claims (10)
1. A line precooling system, comprising:
the low-temperature storage tank is provided with an accommodating cavity for accommodating a first medium;
one end of the transmission pipeline is communicated with the accommodating cavity, the other end of the transmission pipeline is connected with external equipment, and the transmission pipeline is used for transmitting the first medium between the low-temperature storage tank and the external equipment;
the compressor is provided with an air inlet end, the air inlet end is communicated with the accommodating cavity, the compressor is used for compressing the gaseous first medium input from the air inlet end to form a second medium, and the pressure of the second medium is higher than that of the first medium; and
and one end of the pressurization pipeline is connected with the compressor, the other end of the pressurization pipeline is communicated with the transmission pipeline, and the pressurization pipeline is used for transmitting the second medium into the transmission pipeline so as to precool the transmission pipeline.
2. The line pre-cooling system of claim 1, further comprising a condenser and a condensate tank coupled to the condenser;
the condenser is connected with the compressor to condense the second medium into a liquid state; the condensate tank is used for storing the second medium in a liquid state.
3. The line pre-cooling system of claim 1, wherein the line pre-cooling system further comprises a pre-cooling line; one end of the precooling pipeline is communicated with the accommodating cavity, and the other end of the precooling pipeline is connected with the transmission pipeline; the pre-cooling pipeline is communicated with the transmission pipeline to form a pre-cooling channel;
the pressurization pipeline is connected with the precooling pipeline, and the pressurization pipeline, the precooling pipeline and the transmission pipeline are sequentially connected to form a pressurization channel.
4. The line pre-cooling system of claim 3, further comprising a pre-cooling pump having a suction inlet and a discharge outlet, the suction inlet communicating with the receiving cavity, the discharge outlet connected to the pre-cooling line;
the pre-cooling pump is used for pumping the first medium in the low-temperature storage tank into the pre-cooling channel when the pre-cooling channel is opened.
5. The line pre-cooling system of claim 3, wherein a connection of the pressurization line to the pre-cooling line is a first connection point;
a first control valve is arranged on the precooling pipeline and positioned between the first connecting point and the low-temperature storage tank, and the first control valve is used for controlling the on-off of the precooling channel;
a second control valve is arranged on the pressurization pipeline and used for controlling the shutoff of the pressurization channel;
and the precooling channel and the pressurization channel are alternately conducted by adjusting the working states of the first control valve and the second control valve.
6. The line pre-cooling system of claim 5, further comprising a controller, the first control valve being a pneumatic or electric valve, the second control valve being an electric or pneumatic valve; the controller is electrically connected with the first control valve and the second control valve;
the first control valve and the second control valve are alternately opened under the control of the controller.
7. The line pre-cooling system of claim 5, further comprising at least one air pressure detection device, wherein the air pressure detection device is provided in at least one of the cryogenic tank, the pressurization line, and the pre-cooling line.
8. The pipeline precooling system of claim 1, wherein the booster line is a metal tube and the booster line is externally wrapped with a layer of insulation.
9. The in-line precooling system of claim 2, wherein the compressor has a gas outlet connected to the condenser;
the pipeline precooling system further comprises a purging pipeline, one end of the purging pipeline is connected with the gas outlet, and the other end of the purging pipeline is connected with the pressurizing pipeline.
10. The line pre-cooling system of claim 9, wherein the connection of the purge line to the boost line is a second connection point, and wherein a third control valve is disposed on the purge line between the second connection point and the compressor outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920502470.6U CN210034744U (en) | 2019-04-12 | 2019-04-12 | Pipeline precooling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920502470.6U CN210034744U (en) | 2019-04-12 | 2019-04-12 | Pipeline precooling system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210034744U true CN210034744U (en) | 2020-02-07 |
Family
ID=69359335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920502470.6U Active CN210034744U (en) | 2019-04-12 | 2019-04-12 | Pipeline precooling system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210034744U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109915682A (en) * | 2019-04-12 | 2019-06-21 | 南京扬子石油化工设计工程有限责任公司 | Pipeline chilldown system |
-
2019
- 2019-04-12 CN CN201920502470.6U patent/CN210034744U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109915682A (en) * | 2019-04-12 | 2019-06-21 | 南京扬子石油化工设计工程有限责任公司 | Pipeline chilldown system |
| CN109915682B (en) * | 2019-04-12 | 2023-11-24 | 中集安瑞科工程科技有限公司 | Pipeline precooling system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101414212B1 (en) | Method of bulk transport and storage of gas in a liquid medium | |
| CN100473889C (en) | Storage of natural gas in liquid solvents and method for absorbing and segregating natural gas into and out of liquid solvents | |
| US11738829B2 (en) | Offshore facility, floating crude oil production facility and method for generating liquefied natural gas | |
| WO2020154621A1 (en) | Process and method for transporting liquid hydrocarbon and co2 for producing hydrogen with co2 capture | |
| CN210034744U (en) | Pipeline precooling system | |
| JP2004125039A (en) | Co2 transporting method, fluid storing device, plug shooting device, plug recovering device, and fluid storing method | |
| KR100675045B1 (en) | Filling method of Liquified-gas using Diaphragm pump | |
| CN109915682B (en) | Pipeline precooling system | |
| CN107676623A (en) | A kind of differential LNG loading systems | |
| KR102276354B1 (en) | Boil-Off Gas Re-liquefaction System for Vessels and Method for Operation of the Same | |
| CN115697836A (en) | Fuel supply system and method for liquefied gas carrier | |
| CN209943993U (en) | Starting system of low-temperature ethane storage tank | |
| KR20100124537A (en) | Harbor for loading and unloading the cargo and carbon dioxide | |
| CN110945277B (en) | Method and device for storing liquefied gas in a container and for extracting boil-off gas from the container | |
| KR102297861B1 (en) | Boil-Off Gas Treatment System and Method for Ship | |
| US20050005831A1 (en) | Shipboard system for transportation of natural gas in zeolites | |
| JP6709195B2 (en) | Liquefied gas discharge system and discharge method | |
| KR101858510B1 (en) | Boil-Off Gas Re-liquefaction System and Method | |
| AU2019320723B2 (en) | Boil-off gas recycle subsystem in natural gas liquefaction plants | |
| KR20200101564A (en) | Fuel Gas Supply System and Method for a Vessel | |
| US20210372566A1 (en) | Cryogenic nitrogen sourced gas-driven pneumatic devices | |
| CN113154797B (en) | System and method for recondensing boil-off gas from a liquefied natural gas tank | |
| KR20180054146A (en) | Fuel gas supply system having bog treatment apparatus | |
| JP2024512400A (en) | Method and apparatus for reliquefying BOG | |
| KR102066633B1 (en) | Floating Unit for Liquefied Gas Regasification and Storage and Method for Boil-Off Gas Management on the Floating Unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 210000 No. 95, Yangcun Third Road, Dachang street, Jiangbei new area, Nanjing, Jiangsu Patentee after: Zhongji anruike Engineering Technology Co.,Ltd. Address before: No.28, Gaoke 1st Road, high tech Development Zone, Nanjing, Jiangsu 210000 Patentee before: NANJING YANGZI PETROCHEMICAL DESIGN ENGINEERING Co.,Ltd. |