JP5902656B2 - Low temperature liquefied gas storage equipment - Google Patents

Description

  The present invention relates to a cryogenic liquefied gas storage facility.

  For gas supply to areas and areas that do not reach gas pipelines directly connected to gas production plants and large-scale cryogenic liquefied gas storage bases, a relatively small cryogenic liquefied gas storage facility called a satellite base is installed, and gas is supplied there. The source. The satellite base's low temperature liquefied gas storage facilities include a low temperature liquefied gas storage tank (tank), a receiving piping facility for filling the storage tank with the low temperature liquefied gas carried by the tank lorry, and a low temperature liquefaction in the storage tank. It is equipped with a pay-out piping facility for supplying gas to customers as a major facility.

  As a low-temperature liquefied gas storage facility of such a satellite base, a facility in which a plurality of inner tanks are closely arranged in the outer tank is known, and as one of them, a plurality of inner tanks managed in an insulated state are in a plurality of outer tanks. A facility called a cluster type in which inner tanks are closely arranged is known. Such a low-temperature liquefied gas storage facility can reduce the construction cost and shorten the construction period by bringing a small inner tank into the construction site and assembling it, and also has a plurality of storage tanks (inner tanks). Space can be saved because it can be made compact. Moreover, since a plurality of inner tanks can be centrally managed in one outer tank, there is an advantage that disaster prevention management of the storage tank can be easily performed.

  In such low-temperature liquefied gas storage facilities, there are usually multiple inner tanks of the same size, and multiple inner tanks receive and discharge the same in all inner tanks via a common header pipe. As shown, a plurality of inner tanks are managed at the same pressure. For example, in the prior art described in Patent Document 1 below, when the low-temperature liquefied gas from the low-temperature liquefied gas supply source is divided and introduced into each inner tank, the low-temperature liquefied gas can be introduced into the plurality of inner tanks almost evenly. This is shown.

JP 2007-21835 A

  At the satellite base, the tank lorry is pressurized to fill the storage tank with the low-temperature liquefied gas in the tank lorry. The pressure obtained by vaporizing the low-temperature liquefied gas in the tank lorry or the storage tank with a pressurized evaporator. Is added to the tank lorry. At this time, tank lorries are not equipped with high-pressure pressurized evaporators to increase the load of low-temperature liquefied gas, so when using low-temperature liquefied gas in tank lorries, A liquid feed pipe for connecting the pressure evaporator and a gas feed pipe for sending the gas vaporized by the pressure evaporator to the tank truck are required, and the pipe connection work at the time of reception becomes complicated. On the other hand, when using the low-temperature liquefied gas in the storage tank, the liquid feed pipe between the pressurized evaporator and the storage tank in the base can be always connected, so the pressurized evaporator at the time of acceptance The tank lorry can be pressurized simply by connecting the pneumatic piping connecting the tank lorry.

  In order to pressurize the tank lorry using the low-temperature liquefied gas stored in the storage tank and accept the low-temperature liquefied gas, the pressure is increased for one tank to pressurize the tank lorry, and then the pressure evaporation is performed from there. The low temperature liquefied gas is sent to the vessel, and the other storage tank is set to a pressure lower than that of the tank lorry to receive the low temperature liquefied gas from the tank lorry. For this reason, a plurality of storage tanks are required.

  Here, as described above, even in the low temperature liquefied gas storage facility in which a plurality of inner tanks are arranged close to each other in the outer tank, the low temperature liquefaction in the storage tank (inner tank) is performed in order to simplify the pipe connection work at the time of acceptance It is required to pressurize the tank truck using gas. However, although the storage facility described above has a plurality of inner tanks, these are managed at the same pressure, so one of the inner tanks is used for tank lorry pressurization and the other inner tank is used for receiving. I can't. In addition, although it is conceivable to provide a tank for tank lorry pressurization separately outside the outer tank, according to this, it is necessary to manage the disaster prevention tank separately provided for tank lorry pressurization separately from the inner tank in the outer tank, Since an installation space for providing a separate tank is required outside the outer tub, it is not possible to enjoy the advantages of a cluster type that can facilitate disaster prevention management and save space for installation.

  In addition, the pressure of the low-temperature liquefied gas discharged from the storage tank may require a high pressure according to the demand of the customer, but as described above, the low-temperature liquefied gas in which a plurality of inner tanks are arranged close to each other in the outer tank. In storage facilities, multiple inner tanks are managed at the same pressure, so it is necessary to increase the permissible pressure of all the inner tanks in order to cope with the discharge at a high pressure. .

  The present invention has been proposed to cope with such a situation, and in the low-temperature liquefied gas storage facility in which a plurality of inner tanks are arranged close to each other in the outer tank, when receiving the low-temperature liquefied gas from the tank lorry, Enables tank tank pressurization using low-temperature liquefied gas stored in the inner tank. More specifically, it is necessary to install the inner tank without installing a separate storage tank outside the outer tank at the minimum necessary equipment cost. It is an object of the present invention to make it possible to pressurize a tank lorry using stored low-temperature liquefied gas, and to cope with a high pressure discharge at a minimum necessary equipment cost.

In order to achieve such an object, a low-temperature liquefied gas storage facility according to the present invention comprises at least the following configuration.
In the storage facility for the low-temperature liquefied gas in which a plurality of inner tanks are arranged close to each other in the outer tank, the first inner tank of the inner tank , the second inner tank of the inner tank, and the inner tank A pressurized evaporator for vaporizing the stored low-temperature liquefied gas, a receiving liquid pipe for sending the low-temperature liquefied gas in the tank lorry to at least the second inner tank, and a low temperature stored in the first inner tank A pressurizing liquid pipe for sending a liquefied gas to the pressurizing evaporator, a pressurizing gas pipe for sending the pressurizing gas vaporized by the pressurizing evaporator to a tank lorry and sending it to the first inner tank, and the second A transfer liquid pipe for transferring the low-temperature liquefied gas stored in the inner tank to the first inner tank, a gas extraction pipe for extracting the natural vaporized gas from the inner tank, the pressurization gas pipe, and the gas extraction Pressure adjustment gas piping connected to the piping for When the low temperature liquefied gas is received from the lorry, the second inner tank is depressurized by extracting the gas from the gas extracting pipe, and the first inner gas is extracted by extracting the gas via the pressure adjusting gas pipe. The low pressure liquefaction is characterized in that the pressure in the tank is reduced to be lower than the pressure in the second inner tank, and the low temperature liquefied gas in the second inner tank is transferred to the first inner tank through the transfer liquid pipe. Gas storage facility.

  In the present invention having such a feature, a first inner tank having a relatively high permissible pressure and a second inner tank having a relatively low permissible pressure are provided in the outer tank, and a high pressure is provided from the first inner tank. The tank lorry is pressurized with the low-temperature liquefied gas to be sent and discharged at a high pressure to the customer, and the low-temperature liquefied gas in the tank lorry is received by the second inner tank. At this time, only the first inner tank is designed to have a relatively high permissible pressure, so that the equipment cost can be reduced, and the first inner tank and the second inner tank are combined with the second inner tank and insulated in the outer tank. By managing the state, it is possible to facilitate disaster prevention management and save space for installation.

It is explanatory drawing which showed the whole structure of the low-temperature liquefied gas storage equipment which concerns on one Embodiment of this invention. It is explanatory drawing which showed the example (acceptance, pressurization, discharge | payout by high pressure) of the operating state of the low-temperature liquefied gas storage equipment shown in FIG. It is explanatory drawing which showed the example (acceptance, pressurization, discharge | payout by high pressure) of the operating state of the low-temperature liquefied gas storage equipment shown in FIG. It is explanatory drawing which showed the example (transfer, pressurization, discharge | emission with a high pressure) of the operation state of the low-temperature liquefied gas storage equipment shown in FIG. It is explanatory drawing which showed the example (transfer, pressurization, discharge | emission with a high pressure) of the operation state of the low-temperature liquefied gas storage equipment shown in FIG. It is explanatory drawing which showed the example (acceptance, pressurization, discharge | payout in low pressure) of the operating state of the low-temperature liquefied gas storage equipment shown in FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory diagram showing the overall configuration of a low-temperature liquefied gas storage facility according to an embodiment of the present invention. The low-temperature liquefied gas storage facility 1 includes an outer tank 2, an inner tank 3, a pressurized evaporator 4, a liquid pipe, and a gas pipe. The tank truck TR is connected only when the low-temperature liquefied gas storage facility 1 is received, and is not included in the components of the low-temperature liquefied gas storage facility 1. The low-temperature liquefied gas storage facility 1 constitutes, for example, a satellite base, and supplies gas to an area or area that does not reach a gas conduit directly connected to a gas production plant or a large-scale low-temperature liquefied gas storage base. The low temperature liquefied gas received from the tank lorry TR is stored and discharged to the supply destination of the surrounding low temperature liquefied gas. In the following description, a cluster-type low-temperature liquefied gas storage facility in which the inside of the outer tank is managed in an adiabatic state will be described as an example, but the present invention is not particularly limited to this.

  The outer tub 2 manages the inside in a heat-insulated state, and has, for example, a structure having a heat-insulating outer wall and filling the inner space with a heat insulating material. A plurality of inner tanks 3 are disposed in the vicinity of the outer tank 2 and store low-temperature liquefied gas therein. The form of the inner tank 3 is configured in a vertically long cylindrical shape having the same height in the illustrated example.

  The inner tank 3 includes a first inner tank 3A designed with a relatively high allowable pressure and a second inner tank 3B designed with a relatively low allowable pressure. The first inner tank 3A stores a low-temperature liquefied gas for pressurizing the tank lorry when received from the tank lorry TR, and is designed to increase the internal pressure to supply pressure to the tank lorry TR. ing. Assuming that the internal pressure of the tank lorry TR is 0.6 MPa, the allowable pressure of the first inner tank 3A is set to the pressure 0.6 MPa required for pressurization of the tank lorry TR from the first inner tank 3A to the pressurized evaporator 4. The pressure can be set to about the pressure added with the pressure loss of the pipe passing through the tank lorry TR, or can be set to a high pressure corresponding to the required pressure at the use destination, for example, about 0.9 MPa.

  Although two first inner tanks 3A are provided in the illustrated example, the present invention is not limited to this. As will be described later, when transferring low-temperature liquefied gas from the second inner tank 3B to the first inner tank 3A while continuing to pay out from the first inner tank 3A, there are two first inner tanks 3A. A plurality of the above is required, but when the transfer is interrupted and the transfer from the second inner tank 3B is performed, the first inner tank 3A may be a single unit.

  The second inner tank 3B is provided mainly for receiving the low-temperature liquefied gas from the tank lorry TR, and the pressure is adjusted to a pressure lower than the internal pressure of the pressurized tank lorry TR. The second inner tank 3B at the time of acceptance is adjusted to about 0.3 MPa. In the illustrated example, two second inner tanks 3B are provided. However, the number is not limited to this, and one or several second inner tanks 3B can be provided.

  The pressurized evaporator 4 is provided to vaporize the low-temperature liquefied gas in the inner tank 3 and pressurize the tank truck TR. The pressurized evaporator 4 is provided to vaporize the low-temperature liquefied gas and pressurize the first inner tank 3A. As the pressure evaporator 4, a known type such as a hot water type or an air temperature type can be used.

  The liquid piping of the low-temperature liquefied gas storage facility 1 will be described. In FIG. 1, the liquid piping is shown by a solid line. As main liquid pipes, a receiving liquid pipe 5A, a dispensing liquid pipe 5B, a pressurizing liquid pipe 5C, and a transfer liquid pipe 5D are provided. Further, a spray liquid pipe 5E is provided as a liquid pipe necessary for practical use.

  The receiving liquid pipe 5A is a pipe 50 having one end connected to the tank lorry TR and a pipe communicating with the pipe 50, and feeds the low-temperature liquefied gas in the tank lorry TR to at least the second inner tank 3B. In the example shown in FIG. 1, the pipes 51, 52, 53 communicating with the pipe 50 are the receiving liquid pipe 5 </ b> A. The pipes 51a and 51b branched from the pipe 51 are also receiving liquid pipes 5A, which respectively communicate with the plurality of second inner tanks 3B and send the low-temperature liquefied gas in the tank truck TR to the second inner tank 3B. Is. The pipes 52 and 53 communicate with the first inner tank 3A, respectively, and send the low-temperature liquefied gas in the tank lorry TR to the first inner tank 3A. In the example shown in FIG. 1, a valve 51 </ b> V is provided in the pipe 51, a valve 52 </ b> V is provided in the pipe 52, and a valve 53 </ b> V is provided in the pipe 53. The valves 51V to 53V can be opened and closed independently.

  The dispensing liquid pipe 5B is a pipe 54 that extends to the supply destination and a pipe that communicates with the pipe 54, and is a pipe that sends the low-temperature liquefied gas from at least the first inner tank 3A to the supply destination. Pipes 55 and 56 that are respectively connected to the plurality of first inner tanks 3A and communicated with the pipe 54 are discharge liquid pipes 5B. In the example shown in FIG. 1, the pipes 57a and 57b connected to the plurality of second inner tanks 3B and communicating with the pipe 54 and the pipe 57 where they join also function as the discharge liquid pipe 5B. That is, in the example shown in FIG. 1, the second inner tank 3B can be discharged if the pressure is relatively low. Valves 55V, 56V, and 57V are provided in the pipes 55, 56, and 57, respectively. The valves 55V to 57V can be opened and closed independently.

  The pressurizing liquid pipe 5 </ b> C is a pipe that sends the low-temperature liquefied gas stored in the first inner tank 3 </ b> A to the pressurized evaporator 4. In the example shown in FIG. 1, the pipes 55a and 56a branched from the pipes 52 and 53, which are the receiving liquid pipes 5A, are the pressurizing liquid pipes 5C. Valves 55aV and 56aV are provided in the pipes 55a and 56a. The valves 55aV and 56aV can be opened and closed independently.

  The transfer liquid pipe 5D is a pipe for transferring the low-temperature liquefied gas stored in the second inner tank 3B to the first inner tank 3A. In the example shown in FIG. 1, a pipe 58 that communicates a pipe 57 that is a liquid pipe 5B for discharging from the second inner tank 3B and a pipe 52 that is a liquid pipe 5A for receiving the first inner tank 3A is transferred. This is a liquid pipe 5D. Also, a pipe 59 that communicates the pipe 57 that is the liquid pipe 5B for discharging from the second inner tank 3B and the pipe 53 that is the liquid pipe 5A for receiving the first inner tank 3A is the transfer liquid pipe 5D. . At this time, the pipes 52, 53, and 57 also function as the transfer liquid pipe 5D. The pipes 58 and 59 are provided with valves 58V and 59V that open and close independently, respectively, and the pipes 58 and 59 allow only the flow from the second inner tank 3B to the first inner tank 3A. Check valves 58V1 and 59V1 are provided.

  The spray liquid pipe 5 </ b> E branches from the receiving liquid pipe 5 </ b> A and sprays the low-temperature liquefied gas from the upper part of the inner tank 3 into the inner tank 3. Pipes 50a, 50b, and 50c branched from the pipe 50 function as the spray liquid pipe 5E. The pipe 50a is provided with a valve 50aV, the pipe 50b is provided with a valve 50bV, and the pipe 50c is provided with a valve 50cV. The spray liquid pipe 5 </ b> E performs cooling and pressure adjustment of the inner tank 3 by spraying a low-temperature liquefied gas to the gas layer above the inner tank 3.

  The gas piping of the low-temperature liquefied gas storage facility 1 will be described. In FIG. 1, the gas pipe is indicated by a broken line. The low-temperature liquefied gas storage facility 1 includes a pressurizing gas pipe 6A and a pressure adjusting gas pipe 6B as main gas pipes.

  The pressurization gas pipe 6A is a pipe that sends the pressurization gas vaporized by the pressurization evaporator 4 to the tank lorry TR and to the first inner tank 3A and the second inner tank 3B, and one end thereof is the pressurization evaporator. The gas pipe 60 connected to 4 branches and the tank lorry pressurizing pipe 61, the inner tank pressurizing pipes 62 and 63 for pressurizing the inside of the first inner tank 3A, and the inner tank for pressurizing the second inner tank 3B. A pressure pipe 64 is provided. Pressure adjustment valves 61V, 62V, 63V, and 64V that can be independently opened and closed are provided in the respective pipes 61, 62, 63, and 64.

  The pressure adjusting gas pipe 6B has one end communicating with the pipe 61 and the other end communicating with the pipe 69, one end communicating with the pipe 62 and the other end communicating with the pipe 69, and one end communicating with the pipe 63. The other end is constituted by a pipe 67 that communicates with the pipe 69, and the other end is constituted by a pipe 68 that communicates with the pipe 64 and the other end communicates with the pipe 69. Pressure adjustment valves 65V, 66V, 67V, and 68V are provided in the respective pipes 65, 66, 67, and 68, and natural pressure gas (Boil) in the inner tank 3 is provided by the pressure adjustment valves 65V, 66V, 67, and 68V. (Off Gas: BOG) is extracted to adjust the pressure in the inner tank 3, and when receiving from the tank lorry TR and transferring the liquid between the inner tanks 3 (3A, 3B), the pressure rises due to the rise in liquid level. To prevent. The pipe 69 is a gas extraction pipe, for example, a pipe for discharging gas to a demand destination.

  Here, the pressure adjusting valves 61V to 64V are valves for adjusting the pressure on the downstream side by the opening / closing operation, and the pressure adjusting valves 65V to 68V are for adjusting the pressure on the upstream side by the opening / closing operation. It is a valve to do.

  Below, the example of the operating state of the low-temperature liquefied gas storage equipment 1 shown in FIG. 1 is demonstrated. In FIGS. 2 to 6 below, the low temperature liquefied gas (hereinafter simply referred to as “liquid”) or a pipe that is transporting the gas is indicated by a thick line. For valves other than the pressure adjustment valves 61V to 68V, the closed valves are black. Shown in paint, open valve in white. Note that the pressure regulating valves 61V to 68V automatically open and close according to the set pressure value, and are not clearly shown in the drawing.

  In the example shown in FIG. 2, the tank lorry TR is pressurized and discharged at a high pressure by the first inner tank 3A, and is received from the tank lorry TR by the second inner tank 3B. In this example, by opening the valve 55aV and closing the valves 55V and 56aV, the liquid in the first inner tank 3A-1 communicating with the pipe 55 is sent to the pressure evaporator 4 and vaporized by the pressure evaporator 4 The tank lorry TR is pressurized by sending the pressurized gas from the pipe 60 to the tank lorry TR via the pipe 61. Further, the gas for pressurization vaporized in the pressure evaporator 4 is sent to the first inner tanks 3A-1 and 3A-2 via the pipes 62 and 63, and the first inner tanks 3A-1 and 3A-2. Is pressurized.

  In this state, one of the first inner tanks 3A-1 functions as a liquid supply for pressurizing the tank lorry TR, and the other first inner tank 3A-2 is piped from the pipe 56 by opening the valve 56V. 54 has a function of discharging liquid at a high pressure via 54. Then, by opening the valve 51V from the pressurized tank lorry TR, the liquid is supplied to the second inner tank 3B via the pipe 51 (pipes 51a and 51b). At this time, the pressure adjustment valve 68V is opened so as to prevent an increase in pressure due to an increase in the liquid level due to the liquid supply in the second inner tank 3B, and so that the reception from the tank lorry TR is continuously continued. Gas is extracted from the second inner tank 3B via the pipes 64, 68, and 69.

  In the example shown in FIG. 3, similarly to FIG. 2, the tank lorry TR is pressurized and discharged at a high pressure by the first inner tank 3A, and the tank lorry TR receives by the second inner tank 3B. However, by opening the valve 56aV and closing the valves 55aV and 56V, the first inner tank 3A-2 functions as a liquid supply for pressurizing the tank lorry TR, contrary to the example shown in FIG. The first inner tank 3A-1 has a function of discharging a high-pressure liquid from the pipe 55 via the pipe 54 by opening the valve 55V. In this way, the function of the first inner tank 3A can be switched between pressurization and dispensing by switching the valve.

  In the example shown in FIG. 4, the tank lorry TR is blocked from the pipes 50 and 61, and is discharged from the first inner tank 3 </ b> A- 1 with high pressure. The liquid is transferred to 3A-2. In this state, the first inner tank 3A-1 shares two functions for pressurization and discharge, and the pressurization gas pipe 6A has the valve 62V closed and the valves 63V and 64V open. Thus, the first inner tank 3A-1 and the second inner tank 3B are pressurized. Here, by closing the valve 62V and opening the valve 66V, the pressure adjusting pipe 66 is opened, and the gas in the first inner tank 3A-2 is extracted to extract the pressure in the first inner tank 3A-2. Is lower than the second inner tank 3B. Then, the transfer pipe 58 is opened by opening the valve 58V, and the liquid in the second inner tank 3B is transferred to the first inner tank 3A-2 side.

  In the example shown in FIG. 5, the tank lorry TR is blocked from the pipes 50 and 61, and is discharged from the first inner tank 3 </ b> A- 2 with high pressure. The liquid is transferred to 3A-1. In this state, the first inner tank 3A-2 shares two functions for pressurization and discharge, and the pressurization gas pipe 6A has the valve 63V closed and the valves 62V and 64V open. Thus, the first inner tank 3A-2 and the second inner tank 3B are pressurized. Here, by closing the valve 63V and opening the valve 67V, the pressure adjusting pipe 67 is opened, and the gas in the first inner tank 3A-1 is extracted to thereby increase the pressure in the first inner tank 3A-1. Is lower than the second inner tank 3B. And the piping 59 for a transfer is open | released by opening the valve 59V, and the liquid in the 2nd inner tank 3B is transferred to the 1st inner tank 3A-1 side.

  In the example shown in FIG. 6, one of the first inner tanks 3 </ b> A functions as a tank lorry pressurizing function, and all the other inner tanks function as receiving and low-pressure dispensing. In this example, the valves 55V and 56aV are closed and the valve 55aV is opened, so that only the first inner tank 3A-1 functions as a liquid supply for pressurizing the tank lorry TR. The pressurizing gas pipe closes the pressure adjusting valves 62V and 64V to open only the pipe 61 and the pipe 63, and pressurizes the tank lorry TR and pressurizes the first inner tank 3A-1. One inner tank 3A-2 is controlled by the same pressure as the second inner tank 3B. In this state, by opening the valves 51V, 57V, 52V, 56V (valves 58V, 59V are closed), the liquid from the tank truck TR is supplied to the second inner tank 3B and the first inner tank 3A-2, At the same time, the liquid can be discharged at low pressure from the second inner tank 3B and the first inner tank 3A-2 via the pipe 54.

  As described above, the low-temperature liquefied gas storage facility 1 according to the embodiment of the present invention is a cluster-type storage facility in which a plurality of inner tubs 3 are arranged close to each other in an outer tub 2 whose inside is managed in an adiabatic state. By pressurizing the tank lorry TR using the low temperature liquefied gas stored in the tank 3, the low temperature liquefied gas can be received from the tank lorry TR. At this time, the first inner tank 3A storing the low-temperature liquefied gas used for pressurizing the tank lorry TR is distinguished from the second inner tank 3B, and only this is designed to have a relatively high permissible pressure. The facility cost of the inner tank 3 can be minimized.

  The low-temperature liquefied gas storage facility 1 according to the embodiment of the present invention is a low-temperature liquefaction for pressurizing the tank lorry TR with a part of the plurality of inner tanks 3 arranged in the outer tank 2 as the first inner tank 3A. Since the gas can be stored, the disaster prevention management of all the low-temperature liquefied gas to be stored can be centrally managed in the outer tank 2. Further, since it is not necessary to separately provide a cryogenic liquefied gas storage facility outside the outer tub 2, the space of the facility can be saved.

  Then, the low-temperature liquefied gas storage facility 1 according to the embodiment of the present invention sends the pressurizing gas vaporized by the pressure evaporator 4 to the first inner tank 3A having a relatively high permissible pressure. The low-temperature liquefied gas can be discharged from the inner tank 3A at a high pressure. This makes it possible to arbitrarily perform payout at a high pressure according to the demand of the customer. At this time, if a plurality of pressurized evaporators 4 are provided and separated for the first inner tank 3A-1 and the first inner tank 3A-2, liquid transfer can be performed more rapidly.

  In addition, by providing the pressure adjusting gas pipe 6B (pipe 66, pipe 67), the pressure in the first inner tank 3A and the second inner tank 3B can be arbitrarily set. As a result, it is possible to arbitrarily perform receiving, dispensing, and transfer using the first inner tank 3A and the second inner tank 3B.

  As described above, the embodiments of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to these embodiments, and the design can be changed without departing from the scope of the present invention. Is included in the present invention. In addition, the above-described embodiments can be combined by utilizing each other's technology as long as there is no particular contradiction or problem in the purpose and configuration.

1: Low temperature liquefied gas storage equipment, 2: Outer tank,
3, inner tank, 3A, 3A-1, 3A-2: first inner tank, 3B: second inner tank,
4: Pressurized evaporator,
5A: liquid pipe for receiving, 5B: liquid pipe for discharging,
5C: liquid pipe for pressurization, 5D: liquid pipe for transfer, 5E: liquid pipe for spraying,
6A: Gas pipe for pressurization, 6B: Gas pipe for pressure adjustment,
50 to 59, 60 to 69: piping,
TR: Tank truck

Claims (3)

In the storage facility for low-temperature liquefied gas, which has a plurality of inner tanks in the outer tank,
A first inner tank of one of the inner tub,
A second inner tank of said vessel,
A pressurized evaporator for vaporizing the low-temperature liquefied gas stored in the inner tank;
An accepting liquid pipe for feeding the low-temperature liquefied gas in the tank lorry to at least the second inner tank;
A liquid pipe for pressurization for sending the low-temperature liquefied gas stored in the first inner tank to the pressure evaporator;
A pressurizing gas pipe that sends the pressurizing gas vaporized by the pressurizing evaporator to a tank lorry and sends it to the first inner tank;
A transfer liquid pipe for transferring the low-temperature liquefied gas stored in the second inner tank to the first inner tank ;
A gas extraction pipe for extracting natural vaporized gas from the inner tank;
A gas pipe for pressure adjustment in which the gas pipe for pressurization and the pipe for extracting gas are communicated;
When the low temperature liquefied gas is received from the tank lorry, the second inner tank is depressurized by extracting the gas from the gas extracting pipe, and the first inner gas is extracted by extracting the gas via the pressure adjusting gas pipe. The low pressure liquefaction is characterized in that the pressure in the tank is reduced to be lower than the pressure in the second inner tank, and the low temperature liquefied gas in the second inner tank is transferred to the first inner tank through the transfer liquid pipe. Gas storage facility. 2. The low-temperature liquefied gas storage according to claim 1, further comprising a discharge liquid pipe extending from one or both of the first inner tank and the second inner tank to a supply destination of the low-temperature liquefied gas. Facility. The pressurization gas pipe includes a tank truck pressurization gas pipe for sending the pressurization gas to the tank truck, and an inner tank pressurization gas pipe for sending the pressurization gas to the first inner tank,
Pressurizing the tank lorry with pressurizing gas via the tank lorry pressurizing gas pipe and pressurizing the first inner tank with pressurizing gas via the inner tub pressurizing gas pipe;
With accepting low-temperature liquefied gas in tank truck to the second inner tank, according to claim 1 or 2, characterized in that paying out a high pressure low-temperature liquefied gas in the first inner tank through said dispensing for liquid pipe Low temperature liquefied gas storage equipment.

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