JP2005076814A - Residual liquified gas recovery system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a residual liquefied gas recovery system whose constitution can be simplified. <P>SOLUTION: It constitutes a container for pressurization 3 to store the liquefied gas, a pipeline for pressurization 7 serving as a connection part 7a connected to the side of a container 22 that one end communicates to the gas phase 5 of the container for pressurization 3, and other end is a recovery object of the residual liquefied gas, a heating means 9, 23 for raising the pressure in the container for pressurization 3 by heating the liquefied gas stored in the container for pressurization 3, a recovery container 11 that recovers the residual liquefied gas, and a pipeline for recovery 13 serving as a connection part 13a connected to the side of a container 22 that one end is connected to the recovery container 11 and other end is the recovery object of the residual liquefied gas. As such constitution, the residual liquefied gas recovery system can be simplified, because it can recover the residual liquefied gas 31 of the liquid phase that is accumulated in the container 22 regarded as the recovery object of the residual liquefied gas without using a conventional complicated piping, valve, compressor etc. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  In recent years, as a container for storing liquefied gas supplied as fuel, etc., on the premise of transportation, it is installed near or near the place where liquefied gas is used, unlike cylinders that store relatively small volumes of liquefied gas. A container for accommodating a relatively large volume of liquefied gas is used.

  By the way, in the container containing the liquefied gas, as the filling of the liquefied gas in the liquid phase and the consumption of the liquefied gas in the gas phase are repeated, the amount of the residual liquefied gas in the liquid phase state in the container increases. When the amount of residual liquefied gas in the liquid state in the container increases, even if the liquid meter provided in the container indicates that liquid liquefied gas remains in the container, As a result, a problem arises that the gas liquefied gas cannot actually be supplied and the gas runs out. In addition, when the amount of residual liquefied gas in the container increases, the amount of liquefied gas that can be filled into the container decreases, so that the frequency of liquefied gas filling increases and the delivery cycle becomes short. Therefore, it is necessary to recover the residual liquefied gas in the container in the container containing the liquefied gas.

  On the other hand, in the case of a cylinder that accommodates a relatively small volume of liquefied gas on the premise of transportation, the cylinder inlet / outlet is directed downwards, and the remaining in another cylinder connected to the cylinder inlet / outlet via a pipe. A method of recovering a residual liquefied gas that is a liquid has been proposed (see, for example, Patent Document 1). In addition, the gas phase liquefied gas in the container for collecting the residual liquefied gas is sucked with a compressor, and the pressure in the container for collecting the residual liquefied gas is reduced, so that the gas phase portion in the container for collecting the residual liquefied gas is introduced. There has been proposed a method and apparatus for transferring the residual liquefied gas in the container to a recovery container via a communicating pipe line (see, for example, Patent Documents 2 and 3). Furthermore, it is a device that fills a container with liquefied gas from a lorry. The direction of gas flow is switched by filling and switching the valve, etc., and the pipe through which the liquid liquefied gas from the lorry flows is heated. It has been proposed to discharge and recover the residual liquefied gas in the container by sending the gas phase liquefied gas vaporized by the above to a container for recovering the residual liquefied gas (see, for example, Patent Document 4).

JP 2000-88191 A (page 3, FIG. 3) JP-A-6-235497 (page 3-5, FIG. 1) JP-A-6-235497 (page 4-5, FIG. 1) Japanese Unexamined Patent Publication No. 2000-74300 (page 3, FIG. 2)

  The method of recovering the remaining liquid in another cylinder connected to the cylinder inlet / outlet with a pipe with the cylinder inlet / outlet as proposed in Patent Document 1 downward is directed to the transport or the inlet / outlet downward. Applicable to cylinders that can be held. However, a container for storing a relatively large volume of liquefied gas installed at or near the place where the liquefied gas is used cannot be moved due to legal restrictions. For this reason, the method as proposed in Patent Document 1 cannot be applied to a fixed container that cannot be moved.

  On the other hand, the method and apparatus using a compressor as proposed in Patent Documents 2 and 3 can be applied to containers that cannot be moved, but the configuration of the apparatus becomes complicated due to complicated piping, etc. This causes problems in terms of an increase in the size of the transportation vehicle due to the increase in size and cost. Similarly, even in an apparatus for filling a container with liquefied gas from a lorry as proposed in Patent Document 4, it is necessary to use complicated piping, valves, compressors, etc., so that the structure of the apparatus becomes complicated. This causes problems in terms of an increase in the size of the transportation vehicle due to the increase in size and cost. For this reason, a residual liquefied gas recovery device with a simplified configuration is desired.

  An object of the present invention is to simplify the configuration of a residual liquefied gas recovery apparatus.

  The residual liquefied gas recovery apparatus of the present invention includes a pressurization container for storing liquefied gas, one end communicating with a gas phase portion of the pressurization container, and the other end connected to a container side from which the residual liquefied gas is to be recovered. A pressure line that is a connecting part, a heating means for heating the liquefied gas contained in the pressurization container to increase the pressure in the pressurization container, and a recovery means for recovering the residual liquefied gas By having a configuration including a container and a recovery pipe line, one end of which is connected to the recovery container, and the other end of which is connected to the side of the container to be recovered from the residual liquefied gas Solve the above problems.

  With such a configuration, the pressure line is connected to a gas phase liquefied gas inlet / outlet portion of a container that is a target for recovery of the residual liquefied gas, or a pipe line through which the gas phase liquefied gas flows, and the recovery pipe The passage is connected to a pipe communicating with the liquid phase liquefied gas of the container to be recovered of the residual liquefied gas in the pressurizing container. In this state, the heating means heats the liquid liquefied gas contained in the pressurizing container and vaporizes it into a gas phase liquefied gas, thereby reducing the pressure in the pressurizing container as a target for recovering the residual liquefied gas. If the pressure in the container is higher than the pressure in the container, the residual liquefied gas in the liquid phase state in the container that is the target of recovery of the residual liquefied gas becomes the target of recovery of the residual liquefied gas. The liquid is recovered from the pipe communicating with the liquid phase liquefied gas of the container to the recovery container via the recovery pipe line. Thus, without using complicated pipes, valves, compressors, etc., it is possible to recover residual liquefied gas with a configuration including a pressurization vessel, heating means, pressurization pipeline, collection pipeline, and collection vessel. Since the residual liquefied gas can be recovered from the container, the configuration of the residual liquefied gas recovery device can be simplified.

  Further, the heating means is configured to use the exhaust heat from the vehicle loaded with the pressurizing container and the recovery container for heating. Further, the heating means is a heat source machine that burns using the gas phase liquefied gas supplied by the container to be recovered of the residual liquefied gas as fuel, and uses the heat generated by the combustion for heating. With these configurations, it is not necessary to prepare a separate energy supply source for the heating means.

  Furthermore, if the heating means is configured to heat the pressurization container from the bottom outer surface side of the pressurization container, the inside of the pressurization container can be utilized by using the rise in heat without performing complicated processing on the pressurization container. The liquid liquefied gas can be heated, and the configuration of the residual liquefied gas recovery device can be further simplified.

  Further, the collection container is configured such that a collection conduit is connected to the side surface of the collection container. With such a configuration, when performing the recovery operation of the residual liquefied gas with the residual liquefied gas recovery device loaded on the vehicle, for example, the operation of connecting the recovery pipeline to the recovery container or the recovery pipeline The work efficiency can be improved, for example, the opening / closing operation of the valve connected to can be easily performed without climbing on the collection container.

  According to the present invention, the configuration of the residual liquefied gas recovery device can be simplified.

(First embodiment)
Hereinafter, a first embodiment of a residual liquefied gas recovery apparatus to which the present invention is applied will be described with reference to FIG. FIG. 1 is a diagram schematically showing a schematic configuration and operation of a residual liquefied gas recovery apparatus to which the present invention is applied. In FIG. 1, for easy understanding, the container for pressurization, the container to be collected for the residual liquefied gas, the heater, and the like are schematically shown in a cross-sectional state.

  As shown in FIG. 1, the residual liquefied gas recovery apparatus 1 of the present embodiment includes a pressurizing container 3 that is a substantially cylindrical pressure container, and a gas phase section 5 in the pressurizing container 3. A pressure hose 7 constituting a pressure line, a heater 9 constituting a heating means for heating the pressure container 3, a collection container 11 being a substantially cylindrical container, and a collection pipe connected to the collection container 9 It is comprised by the collection | recovery hose 13 etc. which comprise a path | route. The pressurization container 3 and the collection container 9 are installed on a vehicle, in this embodiment, on a loading platform of a truck 15.

  The container 3 for pressurization is installed in the horizontal state on the loading platform of the lorry 15 via the leg 3a. A gas outlet valve 17 for controlling the outflow of gas in the pressurization container 3 and the stoppage of the outflow is installed on the upper part of the pressurization container 3. The gas outlet valve 17 is connected to a pressurizing hose 7 and an outlet pipe 19 provided in the pressurizing container 3 and having an end opened at a portion of the gas phase portion 5 in the pressurizing container 3. Therefore, a gas outlet valve 17 that controls the flow of gas in the pressurizing pipe is provided in the pressurizing pipe formed by the outlet pipe 19 and the pressurizing hose 7. Although not shown, the pressurization container 3 is provided with a liquid level gauge for measuring the amount of liquid phase liquefied gas in the pressurization container 3.

  In the pressurization vessel 3, a liquefied gas having the same liquid phase as the residual liquefied gas to be recovered, for example, liquefied petroleum gas (LPG) or liquefied natural gas (LNG) is accommodated. 3, a liquid phase portion 21 made of a liquid phase liquefied gas and a gas phase portion 5 containing a gas phase liquefied gas obtained by vaporizing the liquid phase liquefied gas are formed. Although not shown, the pressurization container 3 is provided with a pressure gauge that measures and displays the pressure in the pressurization container 3.

  The pressurizing hose 7 connected to the gas outlet valve 17 has a connecting portion 7a whose end opposite to the side connected to the gas outlet valve 17 can be connected to a container 22 that is a recovery target of the residual liquefied gas. ing. The connecting portion 7 a of the pressurizing hose 7 has a valve that opens and closes the flow path of the pressurizing hose 7. Note that the gas outlet valve 17 attached to the pressurizing container 3 is included in a box-shaped cover 3b attached to the upper part of the pressurizing container 3.

  The heater 9 has a configuration in which, for example, a heat exchange pipe line 9a formed in a meandering shape is provided as a flow path through which the heat medium flows in a housing whose upper surface is opened. And the heater 9 is installed in the state which pressed the open | release upper surface side of the housing | casing on the bottom face of the heating container 3 via the frame-shaped sealing member which is not shown in figure. The space formed between the housing enclosing the heat exchange pipe line 9a of the heater 9 attached in this way and the container is filled with a liquid heat medium or a member having thermal conductivity. The The heat exchange line 9 a of the heater 9 is connected to the cooling water flow path of the engine 15 a of the lorry 15 loaded with the residual liquefied gas recovery device 1 via the heat source line 23.

  Therefore, as shown by the dashed line arrow in FIG. 1 by driving the cooling water circulation pump of the engine 15a of the lorry 15, the lorry between the engine 15a and the heater 9 of the lorry 15 is shown. The cooling water of the 15 engines 15 a circulates, and the cooling water that recovered the exhaust heat of the engine 15 a by cooling the engine 15 a becomes a heat source of the heater 9. Thus, in this embodiment, the heater 9, the heat source pipe line 23, etc. constitute a heating means.

  The collection container 11 is installed in a horizontally placed state on the loading platform of the lorry 15 via the legs 11a. A liquid inlet valve 25 for controlling the inflow of the residual liquefied gas into the recovery container 11 and the stoppage of the inflow is installed on the circular side end surface of the recovery container 11. A recovery hose 13 is connected to the liquid inlet valve 25. The recovery hose 13 connected to the liquid inlet valve 25 has a connecting portion 13a at the end opposite to the side connected to the liquid inlet valve 25 that can be connected to a container 22 that is a recovery target of the residual liquefied gas. ing.

  The operation of the residual liquefied gas recovery apparatus 1 having such a configuration and the features of the present invention will be described. Here, the container 22 that is a target of recovery of the residual liquefied gas is a container for storing and storing liquefied gas, for example, liquefied petroleum gas (LPG) or liquefied natural gas (LNG), and is a gas phase liquefied gas. It is installed in the vicinity of facilities and equipment that use fuel as fuel. A container 22 for storing and storing such a liquefied gas is supported by a leg 27 fixed to a pedestal 29 formed of concrete or the like with a bolt or the like in a state where a substantially cylindrical container is turned sideways. Yes. A liquid-phase residual liquefied gas 31 that cannot be vaporized into a gas-phase liquefied gas is accumulated at the bottom of the container 22.

  In addition, the container 22 to be collected for the residual liquefied gas communicates with the gas phase section 33 in the container 22 and is provided in the gas pipe 35 and the gas pipe 35 for supplying the gas phase liquefied gas. A gas supply control valve 37 that controls gas supply, a siphon pipe 39 that communicates with the liquid phase residual liquefied gas 31 in the container 22, and a siphon pipe 39 are connected to the upper part of the container 22. This is a general container used for storing liquefied gas called a bulk storage tank equipped with a provided residual liquefied gas take-off valve 41 and the like. The gas supply control valve 37 and the residual liquefied gas take-off valve 41 are in a state of being enclosed in a box-shaped cover 22a attached to the upper part of the container 22 for collecting the residual liquefied gas.

  A lorry 15 loaded with the residual liquefied gas recovery device 1 is brought near the container 22 that is the target of the recovery of the residual liquefied gas. The pressurization hose 7 and the recovery hose 13 are connected to the residual liquefied gas recovery target container 22 with the valve of the connecting portion 7a of the pressurization hose 7 and the liquid inlet valve 25 of the residual liquefied gas recovery apparatus 1 closed. To do. At this time, the pressurizing hose 7 connects the connecting portion 7a of the pressurizing hose 7 to a gas supply control valve 37 provided in the gas pipe 35 of the container 22 for collecting the residual liquefied gas, The recovery hose 13 is connected to the container 22 for collecting the residual liquefied gas by connecting the connecting portion 13a of the recovery hose 13 to the residual liquefied gas take-off valve 41. The gas outlet valve 17 is always open.

  In this state, the differential pressure between the pressure in the pressurizing container 3 and the pressure in the residual liquefied gas recovery target container 22 is confirmed, and the pressure in the pressurizing container 3 is increased in the residual liquefied gas recovering target container 22. If the pressure is higher than the set pressure, the valve of the connecting portion 7a of the pressurizing hose 7 and the liquid inlet valve 25 are opened, the flow path of the gas supply control valve 37 of the container 22 is switched to the pressurizing hose 7 side, and The residual liquefied gas removal valve 41 of the container 22 is opened. On the other hand, when the pressure difference between the pressure in the pressurizing container 3 and the pressure in the residual liquefied gas recovery target container 22 is not the set differential pressure, heating is performed by driving the engine 15a of the truck 15. The container 9 for pressurization is heated by the heater 9 by allowing the cooling water that has cooled the engine 15 a to flow through the container 9.

  In the heater 9, the heat medium filled in the casing of the heater 9 is heated by the heat of the cooling water that has cooled the engine 15 a flowing through the heat exchange pipe line 9 a, and the heated heat medium The pressurization container 3 is heated by the heat from. As a result, the liquefied gas in the pressurizing container 3 is heated, and the liquid liquefied gas is vaporized to become a gas phase liquefied gas, and the pressure in the pressurizing container 3 increases. Thus, in the heating means configured by the heater 9 of this embodiment, the pressurization container 3 is heated at a lower temperature than when the pressurization container 3 is directly heated by the heat of the cooling water that has cooled the engine 15a. Therefore, the pressurizing container 3 is hardly heated at a temperature higher than necessary.

  In a state where the pressure difference between the pressure in the pressurizing container 3 and the pressure in the container 22 for recovering the residual liquefied gas is equal to or higher than the set differential pressure, the gas outlet valve 17 and the liquid inlet valve 25 are opened, and the container 22 is opened. When the flow path of the gas supply control valve 37 is switched to the pressurizing hose 7 side, and the residual liquefied gas take-off valve 41 of the container 22 is opened, the inside of the pressurizing container 3 as shown by the solid line arrow in FIG. The gas phase liquefied gas flows into the gas phase portion 33 in the container 22 for collecting the residual liquefied gas. When the gas phase liquefied gas in the pressurizing container 3 flows into the gas phase portion 33 in the container 22 to be recovered, the pressure in the container 22 rises, so the liquid level of the liquid phase residual liquefied gas 31 is increased. Is pushed downward, and the liquid phase residual liquefied gas 31 flows into the recovery hose 13 via the siphon tube 39 and the residual liquefied gas take-off valve 41, as indicated by the dashed arrows in FIG. As a result, the residual liquefied gas 31 in the liquid phase in the container 22 to be recovered from the residual liquefied gas is recovered into the recovery container 11 through the recovery hose 13.

  During the recovery of the liquid phase residual liquefied gas 31 in the residual liquefied gas recovery target container 22, the pressure difference between the pressure in the pressurizing container 3 and the pressure in the residual liquefied gas recovery target container 22. In order to keep the pressure difference equal to or higher than the set differential pressure, the heating container 3 is appropriately heated by heating means including the heater 9.

  Thus, in the residual liquefied gas recovery apparatus 1 of this embodiment, it is attached to the pressurization container, the two containers, the pressurization container and the recovery container, without using complicated piping, valves, compressors and the like as in the past. With the configuration of the two heating pipes, the pressurizing pipe and the collecting pipe, the liquid phase residual liquefied gas accumulated in the container 22 to be collected for the residual liquefied gas can be collected. Therefore, the configuration of the residual liquefied gas recovery device can be simplified.

  Furthermore, the configuration of the residual liquefied gas recovery apparatus can be simplified, and the pressurization container 3 is heated by heating means such as the heater 9 to pressurize the inside of the container 22 to be recovered from the residual liquefied gas. Therefore, it is possible to reduce the size of the apparatus, the size of the vehicle used for the conveyance associated therewith, and the cost reduction.

  In addition, since the heating means of the present embodiment uses the exhaust heat from the engine 15a of the lorry 15 loaded with the residual liquefied gas recovery apparatus 1 including the heater 9, for heating, There is no need to prepare a separate energy source, and energy efficiency can be improved by heating the heating container 3 while the truck 15 is running.

  Further, the collection container 11 has a collection hose 13 connected to the side surface of the collection container 11. For this reason, when performing the recovery operation of the residual liquefied gas with the residual liquefied gas recovery device 1 loaded on a vehicle such as the freight car 15, the opening / closing operation of the liquid inlet valve 25 and the like can be easily performed without climbing on the recovery container. Work efficiency can be improved. In addition, since there is no liquid inlet valve or the like on the upper portion of the collection container 11 when loaded on a vehicle such as a truck 15, the height restriction due to the liquid inlet valve or the like for connecting the collection hose 13 can be reduced. .

(Second Embodiment)
Hereinafter, a second embodiment of the residual liquefied gas recovery apparatus to which the present invention is applied will be described with reference to FIG. FIG. 2 is a diagram schematically showing a schematic configuration and operation of a residual liquefied gas recovery apparatus to which the present invention is applied. In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, description thereof is omitted, and features that are different from those in the first embodiment will be described. Further, in FIG. 2, in order to make the explanation easy to understand, a container for pressurization, a container to be collected for the residual liquefied gas, a heater, and the like are schematically shown in a cross-sectional state.

  The residual liquefied gas recovery apparatus of this embodiment differs from the first embodiment in that liquefied gas that can be supplied as fuel remains in the container to be recovered of the residual liquefied gas, and the heating means uses this residual liquefied gas. The object is to use the heat of a heat source device that uses gas-phase liquefied gas supplied from a gas recovery target container as fuel. Therefore, in this embodiment, the container 22 for recovering the residual liquefied gas is connected to the heat source unit 45 via the gas pipe 35, and supplies the gas phase liquefied gas to the heat source unit 45 as fuel. . Moreover, in this embodiment, the heat-medium pipe lines 47a and 47b are connected with the both ends of the heat exchange pipe line 9a of the heater 9, respectively, and are connected with the heater 9 of the heat-medium pipe lines 47a and 47b. The ends opposite to the formed side are connected to the heat source unit 45, respectively.

  The heat source unit 45 includes, for example, a flow path through which a heat medium (not shown) flows, a heat medium tank provided in the flow path, a pump, a burner that heats the heat medium in the flow path, and operations of the pump and the burner A control unit for controlling the device is integrally housed in a housing. And the edge part connected with the heat source machine 45 of the heat-medium pipe line 47a is connected with the flow path through which the heat medium which is not illustrated of the heat-source machine 45 flows, and, thereby, in the heat-medium pipe line 47a, The heat medium heated by the heat source device 45, for example, water flows. The end of the heat medium pipe 47b connected to the heat source unit 45 is also connected to a flow path through which a heat medium (not shown) of the heat source unit 45 flows, but the heat medium pipe 47b includes a heater. The heat medium which released the heat at 9 flows.

  A bypass pipe 47c is provided between a connecting portion of the heat medium pipe 47a to the heat source unit 45 and a connecting part of the heat medium pipe 47b to the heat source unit 45. The bypass pipe 47c is provided with a heat medium amount adjusting valve 49 that adjusts the amount of the heat medium to be flowed to the heater 9 by passing and blocking the heat medium to and from the bypass pipe 47c. Note that the bypass pipe 47c and the heat medium amount adjusting valve 49 have a pipe resistance smaller than that of the heat medium pipe 47a.

  Therefore, when the operation of the heat source unit 47 is started and the burner of the heat source unit 45 starts to burn using the gas phase liquefied gas remaining in the container 22 for recovering the residual liquefied gas as a fuel, and the pump is driven, FIG. As indicated by a dashed line arrow, a heated heat medium such as hot water circulates between the heat source device 45 and the heater 9, and the heat medium heated by the heat source device 45 is heated to the heater. 9 heat source. Thus, in the present embodiment, the heater 9, the heat medium pipes 47a and 47b, the bypass pipe 47c, the heat medium amount adjusting valve 49, and the like constitute the heating means.

  In the residual liquefied gas recovery device 43 of this embodiment as well, the difference between the pressure in the pressurizing container 3 and the pressure in the residual liquefied gas recovery target container 22 by the heater 9 is the same as in the first embodiment. The pressure can be kept above the set differential pressure. Therefore, as indicated by the solid line arrow in FIG. 2, the pressure in the residual liquefied gas recovery target container 22 is increased by the gas phase liquefied gas introduced from the pressurizing container 3 through the pressurizing hose 7, As indicated by the dashed arrows in FIG. 2, the liquid phase residual liquefied gas 31 in the residual liquefied gas recovery target container 22 can be recovered in the recovery container 11 via the recovery hose 13. That is, the configuration of the residual liquefied gas recovery device can be simplified.

  Further, the first and second embodiments include a heater composed of a housing having an open upper portion that encloses the heat exchange pipe, and the exhaust heat of the engine of the lorry or the heat of combustion in the heat source unit is generated. The heating means used is used. However, the heating means is not limited to the heating means of these configurations, for example, a configuration including a heater surrounding the pressurizing vessel, a configuration in which a heat exchange pipe is disposed in the pressurizing vessel, and a pressurizing vessel. It can be formed in various configurations such as a configuration with a heater attached. However, as in the first and second embodiments, if the heating means uses the exhaust heat of the truck engine or the heat of combustion in the heat source machine, a separate energy source for the heating means is prepared. There is no need to do this. In particular, if the exhaust heat from the engine of a truck is used, energy saving is achieved. In addition, as in the case of the first and second embodiments, the heater is complicated to the pressurization container as long as the casing having the open upper part containing the heat exchange conduit is attached to the bottom of the pressurization container. There is no need to perform any special processing.

  Further, the present invention is not limited to the residual liquefied gas recovery apparatus having the configuration of the present embodiment, but two containers including a pressurization container and a recovery container, a heating means attached to the pressurization container, and a pressurization conduit If there are two pipe lines such as a recovery pipe line, various configurations can be made.

It is a figure which shows typically the schematic structure and operation | movement of 1st Embodiment of the residual liquefied gas recovery apparatus to which this invention is applied. It is a figure which shows typically the schematic structure and operation | movement of 2nd Embodiment of the residual liquefied gas recovery apparatus to which this invention is applied.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Residual liquefied gas recovery apparatus 3 Pressurization container 5, 33 Gas phase part 7 Pressurization hose 9 Heater 11 Recovery container 13 Recovery hose 22 Container for residual liquefied gas recovery object 23 Heat source line 31 Residual liquefied gas

Claims (5)

A pressurizing vessel for storing liquefied gas, and a pressurizing tube having one end connected to the gas phase portion of the pressurizing vessel and the other end connected to the side of the vessel from which residual liquefied gas is to be recovered A passage, heating means for heating the liquefied gas stored in the pressurization container to increase the pressure in the pressurization container, a recovery container for recovering the residual liquefied gas, and one end of the recovery container A recovery apparatus for recovering residual liquefied gas, comprising: a recovery pipe connected to the container side, the other end of which is connected to the container side to be recovered of the residual liquefied gas. 2. The residual liquefied gas recovery apparatus according to claim 1, wherein the heating means uses exhaust heat from a vehicle loaded with the pressurizing container and the recovery container for heating. The heating means is a heat source unit that performs combustion using a gas phase liquefied gas supplied by a container to be recovered of the residual liquefied gas as fuel, and uses heat generated by the combustion for heating. The residual liquefied gas recovery device according to claim 1. The residual liquefied gas recovery apparatus according to any one of claims 1 to 3, wherein the heating unit heats the pressurization container from the bottom outer surface side of the pressurization container. The residual liquefied gas recovery apparatus according to any one of claims 1 to 4, wherein a recovery conduit is connected to a side surface of the recovery container.

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