JP7190899B2 - Equipment for handling liquefied cryogenic fluids - Google Patents

Description

TECHNICAL FIELD The present invention relates to a liquefied cryogenic fluid loading and unloading facility for loading and unloading a cryogenic fluid to and from a ship that carries the liquefied cryogenic fluid on water.

As a cargo handling facility for cargo handling of LNG as a liquefied cryogenic fluid, as shown in Patent Document 1, LNG that is pressure-fed by a pressure-feeding pump from an LNG storage tank provided on land is placed on the water via a liquid flow pipe or the like. Installations for pumping to a shipside LNG reservoir provided on a ship are known.

JP 2017-105507 A

In recent years, the demand for natural gas fuel has been increasing as a means of reducing nitrogen oxides and carbon dioxide in exhaust gas due to exhaust gas regulations. There was room for development.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object thereof is to provide a liquefied cryogenic fluid cargo handling facility capable of effectively and quickly carrying out LNG cargo handling on ships.

A liquefied cryogenic fluid cargo handling facility for achieving the above object is a liquefied cryogenic fluid cargo handling facility for loading and unloading a liquefied cryogenic fluid between a vessel that carries the liquefied cryogenic fluid on water, and characterized by:
pressure-feeding means for pumping the liquefied cryogenic fluid from the land-side reservoir storing the liquefied cryogenic fluid on land to the ship-side reservoir storing the liquefied cryogenic fluid on the ship; and a fluid communication pipe through which the liquefied cryogenic fluid or the vaporized fluid obtained by vaporizing the liquefied cryogenic fluid flows between the A flexible fluid flow part connected to the vessel side storage part and capable of flowing the liquefied cryogenic fluid is provided in the container ,
It is characterized in that it is configured to be able to simultaneously carry out loading and unloading of liquefied cryogenic fluids from at least two or more of the land-side reservoirs.

According to the above characteristic configuration, in particular, it is configured to be able to carry out cargo handling of liquefied cryogenic fluid from at least two or more land-side storage units at the same time. By simultaneously extracting a large amount of liquefied cryogenic fluid from a plurality of land-side reservoirs and pumping it to a ship, it is possible to quickly carry out cargo handling of the liquefied cryogenic fluid.
In addition, for example, by providing a plurality of flexible fluid passage parts, it is possible to carry out loading and unloading of liquefied cryogenic fluid on a plurality of vessels at the same time, and effective loading and unloading can be realized.

A further characteristic configuration of the liquefied cryogenic fluid loading and unloading equipment is:
As the fluid conduit,
a liquefied low-temperature fluid channel through which the liquefied low-temperature fluid flows from each of the plurality of land-side reservoirs; ,
The present invention is provided with a return flow path capable of returning low-temperature gas generated when the liquefied low-temperature fluid flow path and the confluence flow path are precooled with the liquefied low-temperature fluid to each of the land-side reservoirs.

Various ships are assumed to perform cargo handling with liquefied cryogenic fluid cargo handling equipment, and depending on the ship, it is assumed that the internal pressure of the reservoir on the ship side exceeds the allowable pressure of the reservoir on the land side.
In such a case, in order to prevent the gas in the ship's reservoir from flowing into the land-side reservoir, it is necessary to close the shut-off valve provided in the fluid communication pipe between the ship's reservoir and the land-side reservoir. be.
Therefore, the low-temperature gas generated when the fluid conduit is pre-cooled with the liquefied low-temperature fluid discharged from the land-side reservoir cannot be sent to the ship and must be treated on the land-side.
Even in the above case, according to the characteristic configuration, the low-pressure low-temperature gas can be returned to the land-side reservoir through the return flow path, so that the low-temperature gas such as methane generated on the land side can be returned to the atmosphere. A pre-cooling operation can be properly performed without dissipation.

A further characteristic configuration of the liquefied cryogenic fluid loading and unloading equipment is:
As the land-side storage unit, a recovery land-side storage unit having a sufficient internal filling capacity is configured to be connectable,
a recovery liquefied cryogenic fluid flow path connecting the recovery land-side reservoir and the confluence channel to flow the liquefied cryogenic fluid;
A configuration capable of executing a recovery operation for recovering the liquefied cryogenic fluid that has flowed out of the land-side storage section other than the recovery land-side storage section to the recovery land-side storage section through the recovery liquefied cryogenic fluid flow path. in that it is
For example, a shut-off valve that switches between a closed state and an open state between the ship-side storage section and the land-side storage section in the confluence channel,
The recovery operation includes a discharge pressure change operation in which the liquefied low-temperature fluid discharged by the pumping means is recovered to the land-side recovery storage section while the pressure of the pressure-feeding means is increased or decreased while the shutoff valve is closed. is preferred.

Normally, a pump as a means for pumping a liquefied cryogenic fluid pumps a portion of the liquefied cryogenic fluid while the pump is stopped, precooling it, and then operating the pump to increase the discharge pressure while pumping the liquefied cryogenic fluid. should be increased gradually.
However, as described above, if the internal pressure of the ship-side reservoir exceeds the allowable pressure of the land-side reservoir, the pressure of the liquefied cryogenic fluid discharged from the pump after the pump is started will increase to In such a case, the liquefied cryogenic fluid discharged from the pump cannot be led to the reservoir on the vessel side, and the liquefied cryogenic fluid cannot be discharged. There will be nowhere to go.
According to the above characteristic configuration, the liquefied cryogenic fluid discharged from the pump whose discharge pressure is being changed can be recovered to the recovery land-side reservoir through the recovery liquefied cryogenic fluid flow path, so that the inside of the ship-side reservoir can be recovered. Cargo handling can proceed regardless of pressure.
Furthermore, by constructing the land-side storage part from movable tank trucks, etc., the liquefied low-temperature fluid can be recovered while sequentially replacing tank trucks with a sufficient filling capacity, and cargo handling can be carried out smoothly without delays. can be done.

Furthermore, for example, the recovery operation is
When the pumping means discharges a low flow rate below the minimum discharge rate to the confluence channel, a mini-flow that recovers the remaining flow rate obtained by subtracting the low flow rate from the minimum discharge rate to the recovery land-side storage unit. It preferably includes driving.

In cargo handling facilities, there are cases where a pump as a pumping means must pump a low flow rate that is lower than its minimum discharge rate. By executing the mini-flow operation in which the flow rate exceeding the flow rate is recovered to the recovery land-side reservoir, a desired low flow rate of the liquefied cryogenic fluid can be pumped to the confluence channel.

A further characteristic configuration of the liquefied cryogenic fluid loading and unloading equipment is:
The discharge pressure changing operation is executed when the pressure of the ship side reservoir is higher than the allowable pressure of the land side reservoir.

According to the configuration described so far, it is possible to realize a cargo handling facility that can satisfactorily execute the discharge pressure changing operation even when the pressure in the ship-side reservoir is higher than the allowable pressure in the land-side reservoir.

A further characteristic configuration of the liquefied cryogenic fluid loading and unloading equipment is:
As the fluid conduit, there is provided a liquid drain pipe which is positioned below the liquefied low temperature fluid conduit in the vertical direction and communicates with the liquefied low temperature fluid conduit via a liquid drain opening/closing valve.

According to the above characteristic structure, even if the fluid flow pipe has a relatively complicated structure as in the present invention, the liquefied low-temperature fluid remaining inside is properly discharged to the liquid drain pipe by its own weight. can be collected at

A further characteristic configuration of the liquefied cryogenic fluid loading and unloading equipment is:
a liquefied low-temperature fluid channel through which the liquefied low-temperature fluid flows from each of the plurality of land-side reservoirs; and a confluence channel in which the liquefied low-temperature fluid flowing through the liquefied low-temperature fluid flows,
a shutoff valve that switches between a closed state and an open state between the ship-side storage section and the land-side storage section in the confluence channel;
The purge gas flow path through which the purge gas flows from the purge gas reservoir that stores the purge gas is connected at least in the vicinity of the shutoff valve to the vessel side reservoir side of the shutoff valve.

According to the above characteristic configuration, by guiding the purge gas from the shutoff valve to the side of the vessel-side storage section, for example, immediately after connecting the pipe, the air contained in the flexible fluid passage section can be properly purged, and the flexible It is possible to avoid situations in which the air-fuel ratio exceeds the flammability limit in the fluid passages.
Further, for example, by allowing the purge gas to flow through the liquid draining pipe, the liquefied low-temperature fluid in the liquid draining pipe can be favorably pumped by the purge gas and the residual liquid can be treated.
Further, for example, by circulating the purge gas from the fluid communication section to the land-side storage section, the piping between the fluid communication section and the land-side storage section can be properly purged.

Schematic configuration diagram of cargo handling equipment for liquefied cryogenic fluid according to the first embodiment A diagram showing the flow when performing the air purge operation according to the first embodiment. A diagram showing the flow when performing the gas introduction operation according to the first embodiment. A diagram showing the flow when executing the liquid introduction operation according to the first embodiment. A diagram showing the flow when the liquid removal operation according to the first embodiment is being performed. A diagram showing the flow when performing the purge operation according to the first embodiment. A schematic configuration diagram of a cargo handling facility for liquefied cryogenic fluid according to the second embodiment, and a diagram showing a flow when pre-cooling operation is performed A schematic configuration diagram of a cargo handling facility for liquefied cryogenic fluid according to the third embodiment, and a diagram showing a flow when performing a mini-flow operation A schematic configuration diagram of a liquefied low-temperature fluid cargo handling facility according to the fourth embodiment, and a diagram showing a flow when gas introduction operation is performed A diagram showing the flow when the discharge pressure changing operation according to the fourth embodiment is executed. A diagram showing the flow when the discharge destination change operation and the liquid introduction operation are executed according to the fourth embodiment. A diagram showing the flow when executing the first residual liquid treatment operation according to the fourth embodiment. A diagram showing the flow when executing the second residual liquid treatment operation according to the fourth embodiment. A diagram showing the flow when executing the third residual liquid treatment operation according to the fourth embodiment.

The cargo handling facility 100 for liquefied cryogenic fluid (for example, liquefied natural gas: hereinafter abbreviated as LNG) according to the embodiment of the present invention improves the degree of freedom related to geographical restrictions and time restrictions during cargo handling of liquefied cryogenic fluid. About what you get.

[First Embodiment]
A cargo handling facility 100 for liquefied cryogenic fluid according to the first embodiment will be described below with reference to FIGS.
A cargo handling facility 100 for a liquefied cryogenic fluid according to this embodiment, as shown in FIG. In particular, a pump (pumping means of pumping means) for pressure-feeding the liquefied cryogenic fluid from the first and second land-side storage units LT1 and LT2 that store the liquefied cryogenic fluid on land to the ship-side storage unit ST that stores the liquefied cryogenic fluid on the ship S an example), and a fluid flow pipe that flows between the land-side storage section and the ship-side storage section ST, the liquefied cryogenic fluid or the vaporized fluid obtained by vaporizing the liquefied cryogenic fluid (for example, natural gas: hereinafter abbreviated as NT). and includes at least one mobile body that can move while disconnected from the ship S and the land-side storage section.
In this specification, the land-side storage section may be described as the upstream side, and the ship-side storage section ST as the downstream side.

Here, as the moving body, one end has a first quick coupler QC1 (an example of an attachment/detachment mechanism) detachably attached to the connection end of the fluid conduit, and a second quick coupler QC2 (an example of an attachment/detachment mechanism) is provided at the other end. at least one parent mobile body PM (enclosed by a dashed line in FIG. 1) provided with a hose H through which the liquefied cryogenic fluid can flow. The parent mobile body PM shown in FIG. 1 is equipped with an emergency cutoff valve EV that cuts off the flow of fluid between the ship S and the cargo handling facility 100 in the fluid flow pipe, An emergency detachment device EW for separating the ship S and the cargo handling equipment 100 is provided for the hose H (an example of the flexible fluid flow part). Furthermore, as the parent mobile body PM, a control device C (an example of a control unit) that controls the opening and closing states of pumps P1 and P2 and various valve elements described later in order to control the flow of fluid in the entire cargo handling facility 100 ) is provided. Incidentally, the first quick coupler QC1 and the second quick coupler QC2 as attachment/detachment mechanisms may be replaced by flanges or the like.
Further, in the cargo handling facility 100 shown in FIG. 1, in addition to one parent mobile body PM, one child mobile body CM (structure surrounded by a two-dot chain line in FIG. 1) is provided. Both the parent mobile body PM and the child mobile body CM are configured to be movable in a form in which each constituent device is installed inside a container. In addition, each mobile body is equipped with a handling crane that is responsible for moving and installing various equipment in the container and moving and installing fluid communication pipes between the land-side storage area and the mobile body. A gas detector is provided to detect gas concentration such as.
In addition, the parent moving body PM has a gas reservoir for storing a purge gas (for example, nitrogen or methane) for purging the fluid communication pipe, and electric power for driving various devices provided on the moving body. A generator that generates electricity, a diffusion tower that dissipates low-temperature fluid such as surplus natural gas generated during cargo handling, and a low-temperature fluid that dissipates when the internal pressure of the fluid flow pipe exceeds the allowable value. An accumulator is provided for accumulating pressure for driving the valve body. Incidentally, the above-described various configurations provided only for the parent mobile body PM may be provided for each of the child mobile bodies CM.

The first land-side storage part LT1 includes a first liquid inflow/outflow part LE1 that has a fifth flange F5 and a tenth on-off valve V10 as an inflow/outflow end and that flows in and out of the liquid. A first gas inflow/outflow part GE1 having a sixth flange F6 and an eleventh on-off valve V11 for inflowing/outflowing gas is provided.
The parent moving body PM has a first liquid flow path LF1 which is connected at one end to the first liquid inflow/outflow part LE1 via a fifth flange F5 and has a sixth on-off valve V6 at the other end, and a first fluid flow path LF1 at one end. A first gas flow path GF1 having a seventh on-off valve V7 at the other end and communicating with the first gas inflow/outflow part GE1 via a 6 flange F6, and both are connected at the other end side. It is communicatively connected to the first mixing flow path MF1. In the first mixing flow path MF1, from the upstream side, the liquefied cryogenic fluid is pressure-fed from the upstream side to the downstream side, and an inverter-type first pump P1 whose rotation speed can be adjusted, and the second mixing flow path MF2 flow. A first flow regulating valve RV1 for adjusting the flow rate of the fluid to be used, and a first check valve CV1 for inhibiting reverse flow of the fluid from the downstream side to the upstream side are provided in the order described, and the downstream end thereof is connected to another moving body. is connected to a confluence flow path JTL through which the fluid from the The first mixing flow path MF1 is provided with a first bypass flow path MF1a that bypasses the first check valve CV1, and the first bypass flow path MF1a is provided with a fourth on-off valve V4. ing.

The second land storage section LT2 and the child mobile body CM have the same configuration as the above-described first land storage section LT1 and the parent mobile body PM in relation to flow paths through which the liquefied cryogenic fluid and the cryogenic gas flow. ing.
That is, the second land-side reservoir LT2 has a second liquid inflow/outflow part LE2 that has a seventh flange F7 as an inflow/outflow end and a twelfth opening/closing valve V12 for inflowing/outflowing the liquid. and a second gas inflow/outflow part GE2 that has an eighth flange F8 and a thirteenth on-off valve V13 for inflow and outflow of gas.
The child moving body CM has a second liquid flow passage LF2 which is connected at one end to the second liquid inflow/outlet portion LE2 through a seventh flange F7 and has an eighth on-off valve V8 at the other end, and a second liquid passage LF2 at one end. It is provided with a second gas flow path GF2 that communicates with the second gas inflow/outflow part GE2 via an eighth flange F8 and has a ninth on-off valve V9 at the other end, and both are connected at the other end side. It is communicatively connected to the second mixing flow path MF2. In the second mixing flow path MF2, from the upstream side, the liquefied cryogenic fluid is pressure-fed from the upstream side to the downstream side, and an inverter-type second pump P2 capable of adjusting the rotation speed flows through the second mixing flow path MF2. A second flow regulating valve RV2 for regulating the flow rate of the fluid, and a second check valve CV2 for inhibiting reverse flow of the fluid from the downstream side to the upstream side are provided in the order described, and the downstream end thereof is connected to another moving body. is connected to a confluence flow path JTL through which the fluid from the The second mixing flow path MF2 is provided with a second bypass flow path MF2a that bypasses the second check valve CV2, and the second bypass flow path MF2a is provided with a fifth on-off valve V5. ing.

The confluence flow path JTL is a flow path that is commonly formed for a plurality of moving bodies. and the child moving body CM are communicated and connected via a first flange F1. A third flange F3 is provided on the upstream side of the confluence flow path JTL so that the confluence flow path JTL of another moving body can be communicated and connected. is provided, and a first quick coupler QC1 capable of quick connection with the hose H is provided at its downstream end.
The hose H is provided with an emergency detachment device EW, and its downstream end is connected to the vessel side passage SL via a second quick coupler QC2.

The vessel-side flow path SL is provided with a third on-off valve V3 at its upstream end, and has a vessel-side gas flow path SLa through which mainly low-temperature gas such as natural gas flows, and mainly LNG on its downstream side. and a vessel-side liquid passage SLb through which a liquefied low-temperature fluid such as a liquefied low-temperature fluid flows is provided in parallel. The downstream ends of both are connected to the vessel-side reservoir ST, the vessel-side gas flow path SLa is provided with a first on-off valve V1, and the vessel-side liquid flow path SLb is provided with a second on-off valve V2, respectively. is provided. In some cases, the vessel-side gas flow path SLa may flow a liquefied cryogenic fluid.

The fluid flow pipe described so far is provided with a plurality of release valves for releasing gas to the outside when the inside is purged.
In addition to the description, the first release valve HV1 and the second release valve HV2 are provided downstream and upstream of the emergency cutoff valve EV in the confluence flow path JTL, respectively. Furthermore, a third release valve HV3 is provided upstream of the sixth on-off valve V6 in the first liquid flow path LF1, and a fifth release valve HV5 is provided upstream of the eighth on-off valve V8 of the second liquid flow path LF2. A fourth release valve HV4 is provided on the upstream side of the seventh on-off valve V7 in the first gas flow path GF1, and a sixth release valve HV6 is provided on the upstream side of the ninth on-off valve V9 in the second gas flow path GF2. It is

Furthermore, there is provided a purge gas passage for purging the liquefied low-temperature fluid or low-temperature gas remaining inside the fluid passage pipe.
Specifically, the main purge gas flow path PL0 communicated with the purge gas reservoir PT, and the emergency cutoff valve EV and the first release valve EV1 communicated with the main purge gas flow path PL0 and connected to each other at the confluence flow path JTL. A first purge gas flow path PL1 having one end connected between them, a second purge gas flow path having one end connected to the first purge gas flow path PL1 and the other end connected to the first liquid flow path LF1. a flow path PL2, a third purge gas flow path PL3 one end of which communicates with the first purge gas flow path PL1 and the other end of which communicates with the first gas flow path GF1, and one end of which communicates with the first purge gas flow path A fourth purge gas flow path PL4 communicated with PL1 and the other end communicated with the second liquid flow path LF2, one end communicated with the first purge gas flow path PL1 and the other end communicated with the second A fifth purge gas passage PL5 is provided that communicates with the gas passage GF2.
In addition, a first purge valve PV1 is provided in the main purge gas passage PL0, a second purge valve PV2 is provided in the first purge gas passage PL1, a third purge valve PV3 is provided in the second purge gas passage PL2, and a third purge valve PV3 is provided in the second purge gas passage PL2. A fourth purge valve PV4 is provided in the third purge gas passage PL3, a fifth purge valve PV5 is provided in the fourth purge gas passage PL4, and a sixth purge valve PV6 is provided in the fifth purge gas passage PL5. In particular, the second purge valve PV2 is provided in the vicinity of the connecting portion between the first purge gas flow passage PL1 and the confluence passage JTL.
The first purge gas flow path PL1 is also a flow path that is commonly formed for a plurality of moving bodies, similar to the confluence flow path JTL. A connection configuration is adopted. The parent mobile body PM and the child mobile body CM are connected to each other through a second flange F2, and the fourth flange F4 at the other end has a first purge gas flow path PL1 of the other mobile body. Communication connection is possible.
In this way, the moving body can be increased, decreased, installed, and replaced by communicating with the fluid flow pipe of another moving body via the flange or releasing the communicating connection.
Further, the liquefied cryogenic fluid cargo handling facility 100 according to this embodiment is configured to be able to simultaneously carry out cargo handling of liquefied cryogenic fluid from at least two or more first and second land-side reservoirs LT1 and LT2.

It should be noted that the fluid communication pipe may be composed of a flexible pipe. In particular, the flexibility of positioning between multiple moving bodies is improved by constructing flexible pipes between the multiple moving bodies and between the land-side storage section and the moving bodies. can.

The liquefied cryogenic fluid cargo handling facility 100 described so far performs cargo handling of the liquefied cryogenic fluid by sequentially executing the following operations. 2 to 6, thick dashed lines indicate the flow of gas, and thick solid lines indicate the flow of liquid.
The cargo handling facility 100 performs a purge operation for purging air existing inside the fluid communication pipes at the connection stage while maintaining the connection state shown in FIG. In the purge operation, as shown in FIG. 2, the purge gas blown out from the purge gas reservoir PT flows through all the purge gas passages through the first liquid passage LF1, the second liquid passage LF2, and the second liquid passage LF2. All the release valves (first release valve HV1, third release valve HV3, fourth release valve HV1, third release valve HV3, fourth release valve Via HV4, fifth release valve HV5, and sixth release valve HV6), the purge gas containing air is released to the atmosphere. In the purge operation, all the release valves except the second release valve HV2 and all the purge valves are open, and the other valve elements are closed.

Next, a gas introduction operation is performed in which a low-temperature gas such as natural gas is introduced into the fluid flow pipe. In the gas introduction operation, as shown in FIG. 3, the low-temperature gas is introduced from the ship-side reservoir ST through the ship-side gas flow path SLa, the ship-side flow path SL, the hose H, the confluence flow path JTL, and the first bypass flow path. MF1a, second bypass flow path MF2a, first mixing flow path MF1, second mixing flow path MF2, first gas flow path GF1, second gas flow path GF2, first gas inlet/outlet portion GE1, and second gas It is introduced into the inflow/outflow part GE2. That is, the first on-off valve V1, the third on-off valve V3, the emergency shut-off valve EV, the fourth on-off valve V4, the fifth on-off valve V5, the first flow control valve RV1, the second flow control valve RV2, the seventh on-off valve V7. , the ninth on-off valve V9, the eleventh on-off valve V11, and the thirteenth on-off valve V13 are opened, and the other valve bodies are closed. If the first pump P1 and the second pump P2 are pumps that cannot reverse flow, the low-temperature gas is introduced in such a manner as to bypass the pumps through a bypass passage (not shown).
Although detailed explanation is omitted, when the internal pressure of the first and second land-side storage sections LT1 and LT2 is higher than the internal pressure of the ship-side storage section ST, the low-temperature gas A gas introduction operation is performed to introduce gas from LT1 and LT2 toward the vessel-side storage section ST.

After that, a liquid introduction operation is performed in which liquefied cryogenic fluid is discharged from the first and second land-side reservoirs LT1 and LT2 and received in the ship-side reservoir ST. In the liquid introduction operation, as shown in FIG. 4, the liquefied cryogenic fluid is supplied from the first and second land-side reservoirs LT1, LT2 to the first liquid inflow/outlet part LE1, the second liquid inflow/outlet part LE2, and the first liquid passage. Via the flow path LF1, the second liquid flow path LF2, the first mixing flow path MF1, the second mixing flow path MF2, the confluence flow path JTL, the hose H, the vessel side flow path SL, and the vessel side liquid flow path SLb , a liquefied cryogenic fluid is introduced into the vessel-side reservoir ST. That is, a tenth on-off valve V10, a twelfth on-off valve V12, a sixth on-off valve V6, an eighth on-off valve V8, a first flow control valve RV1, a second flow control valve RV2, a first check valve CV1, and a second check valve. The stop valve CV2, the emergency shutoff valve EV, the third on-off valve V3, and the second on-off valve V2 are opened, and the other valve elements are closed.
In this operation, the liquefied cryogenic fluid is pressure-fed in a form in which the required pressure is increased by the first pump P1 and the second pump P2.

When the introduction of the liquefied cryogenic fluid into the vessel-side reservoir ST is completed, a liquid draining operation is performed to drain the liquefied cryogenic fluid existing inside the fluid conduit. In the liquid removal operation, as shown in FIG. 5, the liquefied low-temperature fluid inside the fluid communication pipe is pressure-fed by the low-temperature gas stored in the ship-side storage section ST, and the first and second land-side storage sections LT1 and LT2 are discharged. Drainage is carried out by pumping to. That is, the low-temperature gas in the vessel-side reservoir ST flows through the vessel-side gas flow passage SLa, the vessel-side passage SL, the hose H, the confluence passage JTL, the first bypass passage MF1a, the second bypass passage MF2a, the first It is introduced into the mixing flow path MF1, the second mixing flow path MF2, the first liquid flow path LF1, the second liquid flow path LF2, the first liquid inflow/outlet portion LE1, and the second liquid inflow/outflow portion LE2. That is, a first on-off valve V1, a third on-off valve V3, an emergency shut-off valve EV, a fourth on-off valve V4, a fifth on-off valve V5, a first flow control valve RV1, a second flow control valve RV2, and a sixth on-off valve V6. , the eighth on-off valve V8, the tenth on-off valve V10, and the twelfth on-off valve V12 are opened, and the other valve elements are closed. If the first pump P1 and the second pump P2 are pumps that cannot reverse flow, the low-temperature gas is introduced in such a manner as to bypass the pumps through a bypass passage (not shown).

Finally, as shown in FIG. 6, a purge operation is performed to purge the inside of the fluid flow pipe using the purge gas stored in the purge gas reservoir PT. In the purge operation, the first on-off valve V1, the second on-off valve V2, and the tenth on-off valve V1, the second on-off valve V2, and the tenth on-off valve are operated to prohibit liquid and gas from flowing out from the first and second land-side storage sections LT1 and LT2 and the ship-side storage section ST. V10, the eleventh on-off valve V11, the twelfth on-off valve V12, and the thirteenth on-off valve V13 are closed, and the other valve elements are opened to allow the purge gas to flow through the fluid flow pipe to dissipate all of the gas. Perform a process to dissipate the gas from the valve.

[Second embodiment]
As shown in FIG. 7, the liquefied low-temperature fluid cargo handling facility 100 according to the second embodiment returns low-temperature gas generated during the pre-cooling operation to the first and second land-side reservoirs LT1 and LT2, respectively. It is characterized by having the first and second return flow paths RL1 and RL2, and having a liquid drain pipe NL0 for draining the liquefied cryogenic fluid that has accumulated in the fluid flow pipe, so the description will focus on that point. , the same components as in the first embodiment are denoted by the same reference numerals, and the description thereof may be omitted.
In addition, in the first embodiment, the first liquid flow path LF1 and the first gas flow path GF1 merge to communicate with the first mixing flow path MF1, and the second liquid flow path LF2 and Although the second gas flow path GF2 joins and communicates with the second mixing flow path MF2, in this embodiment, the first gas flow path GF1 leads to the first liquid flow path LF1. A configuration is adopted in which they do not merge, and furthermore, the second gas flow path GF2 does not merge with the second liquid flow path LF2.

One end is connected to the confluence flow path JTL via the first return on-off valve RTV1, and the other end is connected to the downstream outlet of the seventh on-off valve V7 of the first gas flow path GF1 via the first gas side return flow path RL1b. A first return flow path RL1 connected to the is provided. Further, the other end of the first return flow path RL1 is connected to the first liquid side return flow path RL1a connected to the downstream outlet of the sixth on-off valve V6 of the first liquid flow path LF1. A third return opening/closing valve RTV3 is provided in the first liquid side return flow path RL1a.
Furthermore, one end is connected to the junction flow path JTL via the second return on-off valve RTV2, and the other end is connected to the ninth on-off valve V9 of the second gas flow path GF2 via the second gas side return flow path RL2b. A second return flow path RL2 connected to the downstream outlet is provided. A second liquid return channel RL2a connected to the downstream outlet of the eighth on-off valve V8 of the second liquid channel LF2 is connected to the other end of the second return channel RL2. A fourth return on-off valve RTV4 is provided in the second liquid side return flow path RL2a.

By adopting the above configuration, at the initial stage of introduction of the liquefied cryogenic fluid, the liquefied cryogenic fluid flows from the first liquid flow path LF1 and the first mixing flow path MF1 as the liquefied cryogenic fluid flow paths, and the confluence flow path JTL. is guided to the first gas flow path GF1 through the first return flow path RL1, the first liquid-side return flow path RL1a, and the first gas-side return flow path RL1b. 1 can be returned to the land-side reservoir LT1.
Further, the low-temperature gas generated by vaporization of the liquefied low-temperature fluid from the second liquid flow path LF2 and the second mixing flow path MF2 as the liquefied low-temperature fluid flow path, and the confluence flow path JTL is transferred to the second return flow. Through the path RL2, the second liquid side return path RL2a and the second gas side return path RL2b, it can be led to the second gas flow path GF2 and returned to the second land side reservoir LT2.

In the return of the low-temperature gas, the first return on-off valve RTV1 to fourth return on-off valve RTV4, the first and second check valves CV1 and CV2, the first and second flow control valves RV1 and RV2, and the sixth on-off valve V6 - The twelfth on-off valve V12 is opened, and the other valve bodies are closed.

In the second embodiment, the liquefied cryogenic fluid is communicated through the first and second liquid release opening/closing valves DV1 and DV2 in a state vertically below the liquefied cryogenic fluid conduit as the fluid conduit. A liquid drain pipe NL0 is provided in communication with the flow path, and the purge gas can be pumped to the liquid drain pipe NL0 via the sixth purge gas flow path PL6.
A liquid drain operation using the liquid drain pipe NL0 will be described in detail in the fourth embodiment.

[Third embodiment]
The cargo handling facility 100 for the liquefied cryogenic fluid according to the third embodiment is configured so as to be connectable with the recovery land-side storage portion LT3 having a sufficient internal filling capacity as the land-side storage portion. It is characterized in that a recovery operation for recovering the fluid or the like to the recovery land-side storage section LT3 can be executed. Hereinafter, the description will focus on the feature, and the same reference numerals will be given to the same configurations as in the first embodiment, and the description thereof will be omitted.
In the first embodiment, check valves CV1 and CV2 and bypass flow paths Mf1a and Mf2a bypassing the check valves CV1 and CV2 are provided at the connecting portion of the mixing flow paths MF1 and MF2 to the confluence flow path JTL. and a configuration in which the on-off valves V4 and V5 for opening and closing the bypass flow paths Mf1a and Mf2a are provided, but these configurations are omitted in the embodiment.

In the third embodiment, the detailed configuration related to the connection of the flange etc. is omitted, but as shown in FIG. and a third gas inflow/outflow part GE3 having a seventeenth on-off valve V17 for inflow/outflow of gas.
Further, a second mobile body CM2 is provided for using the land-side recovery storage section LT3 for cargo handling.
The second child moving body CM2 communicates with the third liquid inflow/outflow part LE3, and communicates with the third liquid flow path LF3 having the fourteenth on-off valve V14 at the other end, and the third gas inflow/outflow part GE3. and a third gas passage GF3 having a fifteenth on-off valve V15 at the other end thereof, and both are connected at the other end to communicate with the third mixing passage MF3. The third mixing flow path MF3 is provided with a third flow control valve RV3 for adjusting the flow rate of the fluid flowing through the third mixing flow path MF3, and the downstream end of the third flow control valve RV3 is connected to the fluid from the other moving body. It is connected to a confluence flow path JTL that flows.
Further, the third liquid flow path LF3 and the third gas flow path GF3 are each provided with a seventh release valve HV7 and an eighth release valve HV8 for releasing the internal gas in the order described.
Further, the third liquid flow path LF3 is connected to the first purge gas flow path PL1 via a seventh purge gas flow path PL7 provided with a seventh purge valve PV7, and is connected to the first purge gas flow path PL1. is connected to the first purge gas passage PL1 via an eighth purge gas passage PL8 provided with an eighth purge valve PV8.

By adopting the above configuration, the third mixing flow path MF3 and the third mixing flow path MF3 serve as the recovery liquefied low-temperature fluid flow path for connecting the recovery land-side reservoir LT3 to the confluence flow path JTL to flow the liquefied low-temperature fluid. Three liquid flow paths LF3 are provided, and the liquefied cryogenic fluid that has flowed out from the first and second land-side reservoirs LT1 and LT2 is recovered to the recovery land-side reservoir LT3 via the recovery liquefied cryogenic fluid conduits. It is configured to be able to execute recovery operation.
In the recovery operation, for example, as shown in FIG. 8, when the first and second pumps P1 and P2 flow a low flow rate below the minimum discharge amount to the confluence flow path JTL, the low flow rate is subtracted from the minimum discharge amount. This operation includes a mini-flow operation in which the remaining flow is recovered to the land-side reservoir for recovery. In the mini-flow operation shown in FIG. 8, the emergency shutoff valve EV is in a closed state, but by opening the emergency shutoff valve EV, the remaining flow amount obtained by subtracting the low flow rate from the minimum discharge amount is stored on the ship side. It can lead to part ST.

Incidentally, in the third embodiment, the fluid flow pipe is positioned vertically below the liquefied low-temperature fluid flow channel, and through the first, second, and third liquid release opening/closing valves DV1, DV2, and DV3. A liquid drain pipe NL0 is provided in communication with the liquefied low-temperature fluid flow path, and a purge gas can be pumped to the liquid drain pipe NL0 via a sixth purge gas flow path PL6.
A liquid drain operation using the liquid drain pipe NL0 will be described in detail in the fourth embodiment.

[Fourth embodiment]
In the fourth embodiment, in addition to the configuration disclosed in the third embodiment, a third return flow path RL3 for returning the low-temperature gas generated in the fluid conduits to the land-side reservoirs LT1, LT2, and LT3. , the description will focus on this feature, and the same reference numerals will be given to the same configurations as in the third embodiment, and the description thereof will be omitted.
In the third embodiment, the first liquid flow path LF1 and the first gas flow path GF1 merge to communicate with the first mixing flow path MF1. Two gas flow paths GF2 merge to communicate with the second mixing flow path MF2, and the third liquid flow path LF3 and the third gas flow path GF3 merge to form the third mixing flow path MF3. Although the communication connection configuration is shown, in the fourth embodiment, the first gas flow path GF1 does not merge with the first liquid flow path LF1, and the second gas flow path GF2 is connected to the second liquid flow path. A configuration is adopted in which the third gas flow path GF3 does not merge with the third liquid flow path LF3.

The third return flow path RL3 has a downstream end connected to the junction flow path JTL via the second release valve HV2 described above, and an upstream end connected to the sixth flow path LF1 of the first liquid flow path LF1. Downstream outlet of on-off valve V6, downstream outlet of seventh on-off valve V7 of first gas flow path GF1, downstream outlet of eighth on-off valve V8 of second liquid flow path LF2, second gas flow path It communicates with the downstream outlet of the ninth on-off valve V9 of GF2 and the downstream outlet of the fifteenth on-off valve V15 of the third gas passage GF3. A fifth return on-off valve RTV5 is provided at a connecting portion of the first liquid flow path LF1 to the downstream outlet of the sixth on-off valve V6, and is downstream of the eighth on-off valve V8 of the second liquid flow path LF2. A sixth return opening/closing valve RTV6 is provided at the connection site to the side outlet.

Furthermore, as a fluid conduit, the liquid conduit is positioned vertically below the liquefied cryogenic fluid conduit through the first, second, and third liquid drain opening/closing valves DV1, DV2, and DV3 to the liquefied cryogenic fluid conduit. A liquid drain pipe NL0 is provided to communicate with the liquid drain pipe NL0, and the purge gas can be pressure-fed to the liquid drain pipe NL0 via the sixth purge gas flow path PL6.
Specifically, a first liquid drain on-off valve DV1 is provided at the connection portion between the lowermost end of the first mixing flow path MF1 in the vertical direction and the liquid draining pipe NL0, A second liquid drain on-off valve DV2 is provided at the connection portion between the lower end and the liquid drain pipe NL0, and a third liquid drain on-off valve is provided at the connection portion between the lowermost end of the third mixing flow path MF3 in the vertical direction and the liquid drain pipe NL0. DV3 is provided, and a ninth purge valve PV9 is provided in the sixth purge gas passage PL6.

In the cargo handling facility 100 according to the fourth embodiment, after the purge operation shown in the first embodiment is executed, the gas introduction operation and the liquid introduction operation are sequentially executed in the open/closed state of the valves shown in FIG. . In addition, in the liquid introduction operation in the fourth embodiment, the generated The resulting low-temperature gas is returned to the first and second land-side reservoirs LT1 and LT2 and the recovery land-side reservoir LT3.

After the liquid introduction operation, the first pump P1 and the second pump P2 are to be operated, but the internal pressure of the ship-side reservoir ST exceeds the allowable pressure of the first and second land-side reservoirs LT1 and LT2. In this case, it is necessary to close the emergency shutoff valve EV so that the gas in the ship-side reservoir ST does not flow into the first and second land-side reservoirs LT1 and LT2. If it takes time to pressurize the first pump P1 and the second pump P2, emergency shutdown until the discharge pressure of the first pump P1 and the second pump P2 (+ pressure due to elevation difference + pressure loss) exceeds the pressure of the ship. Valve EV must be closed.
Therefore, in the discharge pressure change operation executed in the circuit state shown in FIG. While gradually increasing the pressure, the discharged liquefied low-temperature fluid is recovered in the recovery land-side reservoir LT3.
A similar process is executed when the pressures of the first pump P1 and the second pump P2 are decreased.

When this operation is executed and the discharge pressures of the first pump P1 and the second pump P2 reach a desired pressure exceeding the internal pressure of the vessel-side reservoir ST, as shown in FIG. A discharge destination change operation in which the valve EV, the third on-off valve V3, and the second on-off valve V2 are shifted to the open state, and the third flow control valve RV3, the 14th on-off valve V14, and the 16th on-off valve V16 are shifted to the closed state. , the steady cargo handling operation is performed to introduce the liquefied cryogenic fluid into the vessel-side reservoir ST.

When cargo handling by the steady cargo handling operation is completed, the discharge destination of the liquefied cryogenic fluid is changed again to the recovery land-side reservoir LT3 in the discharge destination change operation, and the first pump P1 and the second pump P2 are changed in the discharge pressure change operation. 12, in the circuit state shown in FIG. A first residual liquid treatment operation is performed in which the flow path SL and the vessel-side liquid flow path SLb are made to flow, and the liquefied low-temperature fluid therein is pressure-fed to the vessel-side storage section ST.
Further, as shown in the circuit state shown in FIG. 12, the first liquid drain on-off valve DV1, the second liquid drain on-off valve DV2, and the third liquid drain on-off valve DV3 are opened, and the confluence flow path JTL and the first mixed flow The liquefied cryogenic fluid remaining in the channel MF1, the second mixing channel MF2, the third mixing channel MF3, the first liquid flow channel LF1, the second liquid flow channel LF2, and the third liquid flow channel LF3 is drained. After that, in the circuit state shown in FIG. 13, each channel from which the liquid is removed is filled with low-temperature gas from the first and second land-side reservoirs LT1 and LT2 and the recovery land-side reservoir LT3. The second residual liquid treatment operation is executed.
Finally, in the circuit state shown in FIG. 14, the purge gas is guided from the purge gas reservoir PT through the main purge gas flow path PL0 and the first purge gas flow path PL1 to the liquid drain pipe NL0, and stored in the liquid drain pipe NL0. A third residual liquid treatment operation is executed to recover the liquefied cryogenic fluid to the recovery land-side reservoir LT3 via the third liquid flow path LF3.
Incidentally, in the third residual liquid treatment operation, the residual liquid may be returned to the first and second land-side reservoirs LT1 and LT2 by devising the circuit configuration.

[Another embodiment]
(1) In the above embodiment, the tank truck was exemplified as the land-side reservoir for storing the liquefied cryogenic fluid to be loaded and unloaded between ships. However, the land-side storage unit may be a fixed storage tank provided on land, or a tanker placed on water.

(2) Further, although illustration is omitted, each of the moving bodies is provided with a heating evaporator that heats the liquefied cryogenic fluid pressure-fed from the first and second land-side reservoirs LT1 and LT2 by exchanging heat with air. It is provided as a pumping means in place of the first pump P1 and the second pump P2, and is provided with a return path for returning the low-temperature gas such as natural gas pressurized by the evaporation to the first and second land-side storage units LT1 and LT2. 1, 2 A configuration can be adopted in which the pressure from the land-side reservoirs LT1, LT2 is controlled to a desired pressure.
The low-temperature fluid such as natural gas generated by the heating evaporator can be supplied as fuel to the generator provided in the parent mobile body PM.
It should be noted that the low-temperature fluid may be supplied to a generator provided independently without being incorporated in the moving body.

(3) In the above-described embodiment, each moving body is connected to a single land-side storage section, but a plurality of land-side storage sections are connected to a single moving body. Configurations can also be employed.

(4) Even if the maximum pumping flow rate of the liquefied cryogenic fluid by the second pump P2 of the child mobile body CM is less than the maximum pumping flow rate of the liquefied cryogenic fluid by the first pump P1 of the parent mobile body PM, I do not care. Then, the first pump P1 of the parent mobile body PM is operated for loading and unloading of the liquefied low-temperature fluid to the vessel-side storage ST, and only the second pump P2 of the child mobile body CM is operated in the fluid communication pipe or the vessel. A configuration in which the precooling operation for precooling the tank or the like may be employed.
However, the second pump P2 of the child mobile body CM may be operated during the cargo handling operation. By clarifying the role of each pump in this way, it is possible to limit the range of the discharge flow rate required for the pump, and to reduce the equipment cost.

(5) In the above embodiment, the cargo handling facility 100 is configured to include one parent mobile body PM. However, a configuration including two or more parent mobile bodies PM may be adopted.
Then, the parent mobile bodies PM may be configured to perform loading and unloading of the liquefied cryogenic fluid separately with different ships S in a state where the parent mobile bodies PM are arranged at locations separated from each other. do not have.
Also, the control devices C of the parent mobile body PM may communicate with each other and establish a master-slave relationship.

(6) In the first to fourth embodiments, a configuration may be adopted in which a pump bypass flow path bypassing the first pump P1 is provided.
By adopting this configuration, even if the first pump P1 is a pump that does not allow reverse flow from the downstream side to the upstream side, the fluid can flow from the downstream side to the upstream side through the pump bypass flow path. can be done.
In addition, when the first pump P1 flows a low flow rate below the minimum discharge amount to the confluence flow path JTL, a mini-flow operation in which the remaining flow amount obtained by subtracting the minimum flow rate from the minimum discharge amount flows through the pump bypass flow path. can be executed.

It should be noted that the configurations disclosed in the above embodiments (including other embodiments, the same shall apply hereinafter) can be applied in combination with configurations disclosed in other embodiments as long as there is no contradiction. The embodiments disclosed in this specification are exemplifications, and the embodiments of the present invention are not limited thereto, and can be modified as appropriate without departing from the object of the present invention.

INDUSTRIAL APPLICABILITY The liquefied cryogenic fluid cargo handling facility of the present invention can be effectively used as a liquefied cryogenic fluid cargo handling facility capable of effectively and quickly carrying out LNG cargo handling by ships.

100: Cargo handling equipment C: Control device CM: Child moving body CM2: Second child moving body DV1: First liquid drain on-off valve DV2: Second liquid drain on-off valve DV3: Third liquid drain on-off valve EV: Emergency shutoff valve EW : Emergency release device GF1 : First gas flow path GF2 : Second gas flow path GF3 : Third gas flow path H : Hose JTL : Merging flow path LF1 : First liquid flow path LF2 : Second liquid flow path Flow path LF3: Third liquid flow path LT1: First land-side storage section LT2: Second land-side storage section LT3: Land-side recovery storage section MF1: First mixing flow path MF2: Second mixing flow path MF3: Third mixing passage NL0: Liquid drain pipe P1: First pump P2: Second pump PL0: Main purge gas passage PL1: First purge gas passage PL2: Second purge gas passage PL3: Third purge gas passage Path PL4: Fourth purge gas flow path PL5: Fifth purge gas flow path PL6: Sixth purge gas flow path PL7: Seventh purge gas flow path PL8: Eighth purge gas flow path PM: Parent moving body PT: Purge gas storage Part QC1: First quick coupler RL1: First return flow path RL1a: First liquid-side return flow path RL1b: First gas-side return flow path RL2: Second return flow path RL2a: Second liquid-side return flow path RL2b: Second gas-side return channel RL3: Third return channel S: Ship ST: Ship-side storage section TL1: Land-side storage section TL2: Land-side storage section TL3: Recovery land-side storage section

Claims (8)

A liquefied cryogenic fluid loading and unloading facility for loading and unloading liquefied cryogenic fluid between a vessel that carries the liquefied cryogenic fluid on water,
pressure-feeding means for pumping the liquefied cryogenic fluid from the land-side reservoir storing the liquefied cryogenic fluid on land to the ship-side reservoir storing the liquefied cryogenic fluid on the ship; and a fluid communication pipe through which the liquefied cryogenic fluid or the vaporized fluid obtained by vaporizing the liquefied cryogenic fluid flows between the A flexible fluid flow part connected to the vessel side storage part and capable of flowing the liquefied cryogenic fluid is provided in the container ,
A liquefied cryogenic fluid loading and unloading facility capable of simultaneously loading and unloading liquefied cryogenic fluid from at least two land-side storage units. As the fluid conduit,
a liquefied low-temperature fluid channel through which the liquefied low-temperature fluid flows from each of the plurality of land-side reservoirs; ,
2. The method according to claim 1, further comprising a return channel capable of returning a low-temperature gas generated when said liquefied low-temperature fluid flow channel and said confluence channel are pre-cooled with a liquefied low-temperature fluid to each of said land-side reservoirs. Equipment for loading and unloading the liquefied cryogenic fluids described. a liquefied low-temperature fluid channel through which the liquefied low-temperature fluid flows from each of the plurality of land-side reservoirs; ,
As the land-side storage unit, a recovery land-side storage unit having a sufficient internal filling capacity is configured to be connectable,
a recovery liquefied cryogenic fluid flow path connecting the recovery land-side reservoir and the confluence channel to flow the liquefied cryogenic fluid;
A configuration capable of executing a recovery operation for recovering the liquefied cryogenic fluid that has flowed out of the land-side storage section other than the recovery land-side storage section to the recovery land-side storage section through the recovery liquefied cryogenic fluid flow path. 3. The cargo handling facility for liquefied cryogenic fluid according to claim 1 or 2. a shutoff valve that switches between a closed state and an open state between the ship-side storage section and the land-side storage section in the confluence channel;
The recovery operation includes a discharge pressure changing operation in which the liquefied low-temperature fluid discharged by the pumping means while increasing or decreasing the discharge pressure with the shutoff valve closed is collected into the land-side recovery reservoir. Item 4. Equipment for handling a liquefied cryogenic fluid according to item 3. The recovery operation is
When the pumping means discharges a low flow rate below the minimum discharge rate to the confluence channel, a mini-flow that recovers the remaining flow rate obtained by subtracting the low flow rate from the minimum discharge rate to the recovery land-side storage unit. 4. A liquefied cryogenic fluid handling facility according to claim 3, comprising operating. 5. The cargo handling facility for liquefied cryogenic fluid according to claim 4, wherein said discharge pressure changing operation is executed when the pressure in said vessel side reservoir is higher than the allowable pressure in said land side reservoir. Claims 1 to 4, wherein the fluid flow pipe comprises a liquid drain pipe that is positioned below the liquefied low temperature fluid flow channel in the vertical direction and communicates with the liquefied low temperature fluid flow channel via a liquid drain on-off valve. 7. The liquefied cryogenic fluid cargo handling facility according to any one of 6. a liquefied low-temperature fluid channel through which the liquefied low-temperature fluid flows from each of the plurality of land-side reservoirs; and a confluence channel in which the liquefied low-temperature fluid flowing through the liquefied low-temperature fluid flows,
a shutoff valve that switches between a closed state and an open state between the ship-side storage section and the land-side storage section in the confluence channel;
A purge gas flow path through which purge gas flows from a purge gas reservoir that stores purge gas is connected at least in the vicinity of the cutoff valve and to the vessel side reservoir side of the cutoff valve. 7. The liquefied cryogenic fluid cargo handling facility according to any one of 6.

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