CN215862875U - Sled dress formula LNG air feeder - Google Patents
Sled dress formula LNG air feeder Download PDFInfo
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- CN215862875U CN215862875U CN202122400186.8U CN202122400186U CN215862875U CN 215862875 U CN215862875 U CN 215862875U CN 202122400186 U CN202122400186 U CN 202122400186U CN 215862875 U CN215862875 U CN 215862875U
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Abstract
The utility model discloses a skid-mounted LNG (liquefied natural gas) supply device, which comprises a first liquid phase pipeline, a second liquid phase pipeline and a first gas phase pipeline, wherein the first liquid phase pipeline is mainly formed by sequentially connecting a P2 pressure gauge, a stop valve A5, a check valve C1, a stop valve A8, a first main gasifier, a ball valve B1, a ball valve B4, a first pressure regulator, a ball valve B5, a ball valve B6, a flowmeter and a ball valve B7; a T2 thermometer and a P5 pressure gauge are arranged between the ball valve B1 and the ball valve B4; the inlet and outlet ends of the ball valve B1 are respectively connected with the inlet and outlet of an electric heater through a ball valve B2 and a ball valve B3; the first gas phase pipeline comprises a P1 pressure gauge, a stop valve A6 and a stop valve A7 which are sequentially connected together. The utility model can solve the problems of long investment construction period, large occupied area, large field construction amount, high operation and maintenance requirements, and inconvenient secondary removal, transportation and installation of the fixed LNG point supply station, and ensures the safety and reliability of gas supply.
Description
Technical Field
The utility model relates to the technical field of LNG unloading, in particular to a skid-mounted LNG supply device.
Background
LNG is an abbreviation for liquefied natural gas (liquefied natural gas), the main component being methane; the LNG is colorless, tasteless, nontoxic and noncorrosive, has a volume of about 1/625 of the same volume of gaseous natural gas, the weight of the LNG is only about 45% of the same volume of water, and the heat value is 52MMBtu/t (1MMBtu is 2.52 x 10^8 cal); LNG is a clean, efficient energy source. The technical situation of unloading of the existing LNG point supply station is as follows: the tank wagon transports LNG to an LNG point supply station, an air temperature type unloading pressurizer of the LNG point supply station is used for gasifying part of LNG in the tank wagon, the tank wagon is pressurized, the pressure of the tank wagon is increased, and the LNG in the tank wagon is unloaded into an LNG storage tank by using pressure difference until unloading is completed. The unloading process comprises the following steps: LNG passes through tank wagon or tank container car and follows LNG liquefaction factory and offset to city LNG vaporizing station, utilizes the empty warm formula on the tank wagon to step up the vaporizer and step up the tank wagon storage tank for form certain pressure differential between tank wagon and the LNG, utilize this pressure differential to unload the LNG in the tank wagon into the vaporizing station storage tank, unload when finishing, retrieve the gaseous phase natural gas in the tank wagon through platform gas phase pipeline of unloading.
Most of the existing LNG point supply stations adopt fixed stations: the tank wagon transports LNG to an LNG point supply station, a part of LNG in the tank wagon is gasified by using an air temperature type unloading pressurizer of the LNG point supply station, the tank wagon is pressurized to enable the pressure of the tank wagon to rise, the LNG in the tank wagon is unloaded into an LNG storage tank by using pressure difference, and then the gas phase flash evaporation gas of the tank wagon is recovered through an air temperature type BOG heater. When the gas is supplied, the LNG stored in the LNG storage tank is self-pressurized through the air-temperature type storage tank pressurizer, so that the pressure of the LNG storage tank is increased, and the gas is supplied to the downstream terminal through the processes of gasification, heating, pressure regulation, metering, odorization and the like. The existing technology is mature, and the LNG point supply station building relates to the aspects of environmental evaluation, safety evaluation, lightning protection, fire protection and the like, and has complex procedures, so that the LNG point supply station has long investment construction period, large floor area, large field construction amount, high operation and maintenance requirements, and inconvenient secondary removal, transportation and installation.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a skid-mounted LNG supply device, which can solve the problems of long investment construction period, large floor area, large field construction amount, high operation and maintenance requirements, inconvenience in secondary removal, transportation and installation of a fixed LNG point supply station and ensure the safety and reliability of gas supply.
In order to solve the technical problems, the technical scheme adopted by the utility model is as follows:
a skid-mounted LNG supply device comprises a first liquid phase pipeline, a second liquid phase pipeline and a first gas phase pipeline,
the first liquid phase pipeline is mainly formed by sequentially connecting a P2 pressure gauge, a stop valve A5, a check valve C1, a stop valve A8, a first main gasifier, a ball valve B1, a ball valve B4, a first pressure regulator, a ball valve B5, a ball valve B6, a flowmeter and a ball valve B7; a T2 thermometer and a P5 pressure gauge are arranged between the ball valve B1 and the ball valve B4; the inlet and outlet ends of the ball valve B1 are respectively connected with the inlet and outlet of an electric heater through a ball valve B2 and a ball valve B3;
the first gas phase pipeline comprises a P1 pressure gauge, a stop valve A6 and a stop valve A7 which are sequentially connected together, and the stop valve A7 is connected with the outlet end of a check valve C1; the second liquid phase pipeline comprises a stop valve A4 and an unloading booster which are sequentially connected together, and the outlet end of the unloading booster is connected with the inlet end of the stop valve A7; the first gas phase pipeline is connected with a second gas phase pipeline; a third liquid phase pipeline is connected between the stop valve A5 and the check valve C1,
a fourth liquid phase pipeline is connected between the stop valve A4 and the unloading booster; the inlet end of the stop valve A8, the tail end of the first main gasifier and the tail end of the ball valve B5 are respectively provided with reserved interfaces '1', '2' and '3' through a combination valve, the outlet end of the reserved interface '1' is divided into branches and then connected between the stop valve A6 and the stop valve A7 through a combination valve, the reserved interface '1' is used for being connected with the inlet end of the EAG heater, the reserved interfaces '2' and '3' are used for being connected with the outlet end of the EAG heater, and the inlet end of the ball valve B1 is provided with a T1 thermometer;
the inlet end of the ball valve B4 is connected with the outlet end of the ball valve B7 through the ball valve B10, the second pressure regulator, the ball valve B9 and the ball valve B8 which are connected together, and the tail end of the ball valve B9 is connected with the inlet end of the ball valve B6 through a pipeline.
Further optimize, stop valve A8 access connection has the second main vaporizer, and the exit end of second main vaporizer is connected with the exit end of first main vaporizer, and first, two main vaporizers form parallel structure.
Wherein, the tail end of the ball valve B7 is connected with an odorizing device through a ball valve B11, and the odorizing device is connected with a flowmeter.
Further defined, the second gas phase line includes a P3 pressure gauge and a shut-off valve A3 connected together, with shut-off valve A3 connected to the outlet end of shut-off valve A6.
Wherein, the third liquid phase pipeline comprises a P4 pressure gauge and a stop valve A2 which are connected together, and the stop valve A2 is connected between the stop valve A5 and the check valve C1.
Preferably, the fourth liquid phase pipeline comprises a stop valve A1, and the stop valve A1 is connected between the stop valve A4 and the unloading booster.
Further optimized, the tail end of the ball valve B7 is provided with a T3 thermometer and a P6 pressure gauge.
Wherein, the inlet ends of the ball valve B5 and the ball valve B9 are respectively provided with a P7 pressure gauge and a P8 pressure gauge.
Compared with the prior art, the utility model has the following beneficial effects:
in actual use, the unloading device is respectively connected with a tank car and an LNG supply device corresponding to an unloading port, an unloading supercharger is utilized to pressurize the tank car, LNG in the tank car flows into a first main gasifier, the LNG exchanges heat with air and is converted into gaseous natural gas, the temperature of the natural gas is not lower than the ambient temperature by 10-15 ℃, a water bath electric heater is arranged at a place with lower temperature in winter for reheating, the natural gas is regulated to required pressure after reheating, the natural gas is measured and detected by a flowmeter, before entering a pipe network, the natural gas needs to be odorized, gas leakage is guaranteed to be perceived by people, the odorizing amount meets the relevant national standard requirements, when the system pressure exceeds the maximum working pressure, a safety valve is automatically opened, the discharged low-temperature gas is heated by an air-temperature type EAG heater and is discharged to the atmosphere at high altitude through a discharge pipe. In actual use, the emergency gas supply system can achieve the purpose of emergency gas supply, solves the problems of long investment construction period, large occupied area, large field construction amount, high operation and maintenance requirements and inconvenient secondary removal, transportation and installation of a fixed LNG point supply station, has the functions of unloading, LNG gasification, pressure regulation, metering, odorization, safe discharge and the like of the LNG point supply station, can realize gas supply in areas where pipe networks cannot cover, and can also be used as small-sized peak regulation or emergency guarantee for emergency rescue.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is an overall schematic diagram of the present invention.
FIG. 2 is a schematic view of the structure of part A in FIG. 1 according to the present invention.
FIG. 3 is a schematic view of the structure of part B in FIG. 1 according to the present invention.
Reference numerals:
101-unloading booster, 102-EAG heater, 103-first main gasifier, 104-second main gasifier, 105-electric heater, 106-odorizing device, 107-flowmeter, 108-combination valve, 109-first pressure regulator and 110-second pressure regulator.
Detailed Description
In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the embodiments of the utility model. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.
In the description of the embodiments of the present invention, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only used for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred 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 embodiments of the present invention.
Furthermore, the terms "first", "second" and "first" 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" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. Specific meanings of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations.
In embodiments of the utility model, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise the first and second features being in direct contact, or the first and second features being in contact, not directly, but via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.
The following disclosure provides many different embodiments or examples for implementing different configurations of embodiments of the utility model. To simplify the disclosure of embodiments of the utility model, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit embodiments of the utility model. Furthermore, embodiments of the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Example one
Referring to fig. 1 to 3, the embodiment discloses a skid-mounted LNG supply device, which includes a first liquid phase pipeline, a second liquid phase pipeline and a first gas phase pipeline,
the first liquid phase pipeline is mainly formed by sequentially connecting a P2 pressure gauge, a stop valve A5, a check valve C1, a stop valve A8, a first main gasifier 103, a ball valve B1, a ball valve B4, a first pressure regulator 109, a ball valve B5, a ball valve B6, a flow meter 107 and a ball valve B7; a T2 thermometer and a P5 pressure gauge are arranged between the ball valve B1 and the ball valve B4; the inlet and outlet ends of the ball valve B1 are respectively connected with the inlet and outlet of an electric heater 105 through a ball valve B2 and a ball valve B3;
the first gas phase pipeline comprises a P1 pressure gauge, a stop valve A6 and a stop valve A7 which are sequentially connected together, and the stop valve A7 is connected with the outlet end of a check valve C1; the second liquid phase pipeline comprises a stop valve A4 and an unloading booster 101 which are sequentially connected together, and the outlet end of the unloading booster 101 is connected with the inlet end of a stop valve A7; the first gas phase pipeline is connected with a second gas phase pipeline; a third liquid phase pipeline is connected between the stop valve A5 and the check valve C1,
a fourth liquid phase pipeline is connected between the stop valve A4 and the unloading booster 101; the inlet end of the stop valve A8, the end of the first main gasifier 103 and the end of the ball valve B5 are respectively provided with reserved interfaces '1', '2' and '3' through a combination valve 108, the outlet end of the reserved interface '1' is branched and then connected between the stop valve A6 and the stop valve A7 through a combination valve 108, the reserved interface '1' is used for being connected with the inlet end of the EAG heater 102, the reserved interfaces '2' and '3' are used for being connected with the outlet end of the EAG heater 102, and the inlet end of the ball valve B1 is provided with a T1 thermometer;
the inlet end of the ball valve B4 is connected with the outlet end of the ball valve B7 through the ball valve B10, the second pressure regulator 110, the ball valve B9 and the ball valve B8 which are connected together, and the tail end of the ball valve B9 is connected with the inlet end of the ball valve B6 through a pipeline.
Further preferably, the inlet of the stop valve A8 is connected with a second main gasifier 104, the outlet end of the second main gasifier 104 is connected with the outlet end of the first main gasifier 103, and the first main gasifier and the second main gasifier form a parallel structure.
Wherein, the tail end of the ball valve B7 is connected with an odorizing device 106 through a ball valve B11, and the odorizing device 106 is connected with a flow meter 107.
Further defined, the second gas phase line includes a P3 pressure gauge and a shut-off valve A3 connected together, with shut-off valve A3 connected to the outlet end of shut-off valve A6.
Wherein, the third liquid phase pipeline comprises a P4 pressure gauge and a stop valve A2 which are connected together, and the stop valve A2 is connected between the stop valve A5 and the check valve C1.
Preferably, the fourth liquid phase line comprises a stop valve A1, and the stop valve A1 is connected between the stop valve A4 and the unloading booster 101.
Further optimized, the tail end of the ball valve B7 is provided with a T3 thermometer and a P6 pressure gauge.
Wherein, the inlet ends of the ball valve B5 and the ball valve B9 are respectively provided with a P7 pressure gauge and a P8 pressure gauge.
In actual use, the unloading device is respectively connected with a tank car and an LNG supply device corresponding to an unloading port, the unloading supercharger 101 is utilized to pressurize the tank car, LNG in the tank car flows into a first main gasifier 103, the LNG exchanges heat with air and is converted into gaseous natural gas and heated, the temperature of the natural gas reaches 10-15 ℃ or higher than the ambient temperature, an electric heater 105 is arranged at a place with lower temperature in winter for reheating, the natural gas after reheating is regulated to required pressure, the natural gas is measured and detected by a flowmeter 107 and needs to be odorized before entering a pipe network, the gas leakage is ensured to be perceived by people, the odorizing amount meets the relevant national standard requirements, when the system pressure exceeds the maximum working pressure, a safety valve is automatically opened, the discharged low-temperature gas is heated by an air-temperature type EAG heater 102 and is discharged to the atmosphere at high altitude through a discharge pipe.
In actual use, the emergency gas supply system can achieve the purpose of emergency gas supply, solves the problems of long investment construction period, large occupied area, large field construction amount, high operation and maintenance requirements and inconvenient secondary removal, transportation and installation of a fixed LNG point supply station, has the functions of unloading, LNG gasification, pressure regulation, metering, odorization, safe discharge and the like of the LNG point supply station, can realize gas supply in areas where pipe networks cannot cover, and can also be used as small-sized peak regulation or emergency guarantee for emergency rescue.
To facilitate a further understanding of the present invention, the following further describes the specific functions of the present invention:
when unloading:
gasifying part of LNG in the tank car through an unloading pressurizer 101 and then returning the gasified part of LNG to the gas phase of the tank car, so that the pressure of the tank car is increased, and the LNG in the tank car is conveyed to a first main gasifier and a second main gasifier through pressure difference; when in use, two tank wagons are used for one standby to ensure that the air source is uninterrupted;
during gasification:
LNG flows into the first main gasifier and the second main gasifier through a liquid outlet of the tank car, and the temperature of the natural gas is not lower than the ambient temperature by 10-15 ℃ after the LNG is gasified; the main gasifier adopts a heat exchange mode with air, the rated gasification capacity is reduced after the main gasifier is connected and works for 8 hours, at the moment, deicing and defrosting are needed to recover the gasification capacity, and the main gasifier is switched to another main gasifier (the first main gasifier and the second main gasifier are alternately switched), so that the stability of the air supply amount is ensured; in winter, the electric heater 105 is arranged at a place with lower temperature for reheating, and the electric heater is used for bypass conveying at other time, so that the energy consumption is saved;
during pressure regulation:
after gasification, the natural gas is regulated to proper pressure by a pressure regulator, and two ways of pressure regulation are used for one after another, so that continuous and uninterrupted gas supply is ensured;
during metering:
if the natural gas flow is required to be measured and detected through handover settlement, a flow meter 107 is required to be installed after pressure regulation, a bypass is arranged, and when the flow meter 107 is required to be verified, gas is supplied through the bypass;
when odorizing:
before natural gas enters a pipe network, gas needs to be odorized, manual or automatic selection can be made, gas leakage can be guaranteed to be perceived by people, and the odorizing dose meets the requirements of relevant national specifications;
when the safety is released: when the system pressure exceeds the maximum working pressure, the safety valve is automatically opened, and the discharged low-temperature LNG is heated by the EAG heater 102 and then is discharged to the atmosphere at high altitude through the diffusing pipe.
It should be noted that in the present embodiment, the combination valve 108 is a low-temperature combination type safety valve, and the specific structure thereof is not described herein.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the utility model.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, it should be noted that any modifications, equivalents and improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. The utility model provides a sled dress formula LNG gas supply unit which characterized in that: comprises a first liquid phase pipeline, a second liquid phase pipeline and a first gas phase pipeline,
the first liquid phase pipeline is mainly formed by sequentially connecting a P2 pressure gauge, a stop valve A5, a check valve C1, a stop valve A8, a first main gasifier, a ball valve B1, a ball valve B4, a first pressure regulator, a ball valve B5, a ball valve B6, a flowmeter and a ball valve B7; a T2 thermometer and a P5 pressure gauge are arranged between the ball valve B1 and the ball valve B4; the inlet and outlet ends of the ball valve B1 are respectively connected with the inlet and outlet of an electric heater through a ball valve B2 and a ball valve B3;
the first gas phase pipeline comprises a P1 pressure gauge, a stop valve A6 and a stop valve A7 which are sequentially connected together, and the stop valve A7 is connected with the outlet end of a check valve C1; the second liquid phase pipeline comprises a stop valve A4 and an unloading booster which are sequentially connected together, and the outlet end of the unloading booster is connected with the inlet end of the stop valve A7; the first gas phase pipeline is connected with a second gas phase pipeline; a third liquid phase pipeline is connected between the stop valve A5 and the check valve C1,
a fourth liquid phase pipeline is connected between the stop valve A4 and the unloading booster; the inlet end of the stop valve A8, the tail end of the first main gasifier and the tail end of the ball valve B5 are respectively provided with reserved interfaces '1', '2' and '3' through a combination valve, the outlet end of the reserved interface '1' is divided into branches and then connected between the stop valve A6 and the stop valve A7 through a combination valve, the reserved interface '1' is used for being connected with the inlet end of the EAG heater, the reserved interfaces '2' and '3' are used for being connected with the outlet end of the EAG heater, and the inlet end of the ball valve B1 is provided with a T1 thermometer;
the inlet end of the ball valve B4 is connected with the outlet end of the ball valve B7 through the ball valve B10, the second pressure regulator, the ball valve B9 and the ball valve B8 which are connected together, and the tail end of the ball valve B9 is connected with the inlet end of the ball valve B6 through a pipeline.
2. The skid-mounted LNG supply apparatus of claim 1, wherein: the inlet of the stop valve A8 is connected with a second main gasifier, the outlet end of the second main gasifier is connected with the outlet end of the first main gasifier, and the first main gasifier and the second main gasifier form a parallel structure.
3. The skid-mounted LNG supply apparatus of claim 1, wherein: the tail end of the ball valve B7 is connected with an odorizing device through a ball valve B11, and the odorizing device is connected with a flowmeter.
4. The skid-mounted LNG supply apparatus of claim 1, wherein: the second gas phase line included a P3 pressure gauge and a shut-off valve A3 connected together, with shut-off valve A3 connected to the outlet end of shut-off valve a 6.
5. The skid-mounted LNG supply apparatus of claim 1, wherein: the third liquid phase line includes a P4 pressure gauge connected together and a shut-off valve a2, a shut-off valve a2 connected between the shut-off valve a5 and a check valve C1.
6. The skid-mounted LNG supply apparatus of claim 1, wherein: the fourth liquid phase line includes a shutoff valve a1, a shutoff valve a1 connected between the shutoff valve a4 and the unloader booster.
7. The skid-mounted LNG supply apparatus of claim 1, wherein: the tail end of the ball valve B7 is provided with a T3 thermometer and a P6 pressure gauge.
8. The skid-mounted LNG supply apparatus of claim 1, wherein: the inlet ends of the ball valve B5 and the ball valve B9 are respectively provided with a P7 pressure gauge and a P8 pressure gauge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122400186.8U CN215862875U (en) | 2021-09-30 | 2021-09-30 | Sled dress formula LNG air feeder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122400186.8U CN215862875U (en) | 2021-09-30 | 2021-09-30 | Sled dress formula LNG air feeder |
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| CN215862875U true CN215862875U (en) | 2022-02-18 |
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| CN202122400186.8U Active CN215862875U (en) | 2021-09-30 | 2021-09-30 | Sled dress formula LNG air feeder |
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