CN113443117A - Liquid cargo ship and liquid cargo heating system thereof - Google Patents
Liquid cargo ship and liquid cargo heating system thereof Download PDFInfo
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- CN113443117A CN113443117A CN202010224408.2A CN202010224408A CN113443117A CN 113443117 A CN113443117 A CN 113443117A CN 202010224408 A CN202010224408 A CN 202010224408A CN 113443117 A CN113443117 A CN 113443117A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63J—AUXILIARIES ON VESSELS
- B63J2/00—Arrangements of ventilation, heating, cooling, or air-conditioning
- B63J2/12—Heating; Cooling
- B63J2/14—Heating; Cooling of liquid-freight-carrying tanks
Abstract
The application provides a liquid cargo heating system. The liquid cargo heating system is provided with a gas phase output port for delivering gas cargo outwards, and comprises a seawater heater, a glycol heater and a storage tank. The seawater heater is provided with a seawater inlet, a seawater outlet, a first liquid cargo port and a first gas cargo port. The glycol heater is provided with a glycol inlet, a glycol outlet, a second liquid cargo port and a second gas cargo port. The storage tank is used for storing liquid goods, and the top of the storage tank is provided with a third liquid goods port and a third gas goods port. The third liquid cargo port is selectively communicated with the first liquid cargo port or the second liquid cargo port, and the third gas cargo port is correspondingly and selectively communicated with the first gas cargo port or the second gas cargo port, so that the liquid cargo is heated into gas cargo by using the seawater heater or the ethylene glycol heater, and the gas cargo is returned to the storage tank or output through the gas phase output port. At the moment, the problem that the liquid cargo cannot be heated in the low-temperature seawater sea area is solved by additionally arranging the glycol heater to heat the liquid cargo.
Description
Technical Field
The application relates to the field of petrochemical industry, in particular to a liquid cargo ship and a liquid cargo heating system thereof.
Background
LPG (Liquefied Petroleum Gas) is mainly composed of propane and butane, and is condensed into liquid by cooling gaseous Petroleum Gas to-42 deg.c under normal pressure. After the petroleum gas is liquefied, the storage and transportation space can be greatly saved, and the device has the characteristics of large heat value, high performance and the like. The marine LPG storage tank generally adopts a semi-cold semi-pressure type storage tank, and if the marine LPG storage tank and the port LPG storage tank are different in types in the loading and unloading process of the LPG, LPG cargoes need to be heated by a heater and then conveyed to the shore.
At present, the main mode for heating liquid cargos is to heat the liquid cargos by using a heater which takes seawater as a heating medium, and ensure that the temperature of the seawater at the water outlet side is kept above +5 ℃ by controlling the unloading speed, so that the seawater can meet the heat exchange demand of an LPG heater, and the normal transportation of ships and bank cargos is ensured. However, when the ship using seawater to heat the liquid cargo is in a cold water area and the temperature of the seawater is lower than +5 ℃, the seawater heater cannot work normally, so that the cargo on the ship cannot meet the cargo receiving requirement of the land receiving tank, and the ship cannot go to the wharf of the sea area to unload the cargo.
Disclosure of Invention
An object of the application is to provide a liquid cargo heating system, solve and be in the unable normal work of sea water heater in the boats and ships in cold waters among the prior art and lead to the unable problem of unloading of this sea area pier of boats and ships.
In order to solve the technical problem, the following technical scheme is adopted in the application: a liquid cargo heating system having a gas phase outlet for delivering gas cargo outwardly, the liquid cargo heating system comprising: the seawater heater is provided with a seawater inlet for receiving seawater and a seawater outlet for outputting seawater; a first liquid cargo port and a first gas cargo port are also arranged on the first liquid cargo port; the ethylene glycol heater is provided with an ethylene glycol inlet for receiving ethylene glycol and an ethylene glycol outlet for outputting the ethylene glycol; a second liquid cargo port and a second gas cargo port are also arranged on the first gas cargo port; and a storage tank for storing the liquid cargo; a third liquid cargo port and a third gas cargo port are arranged at the top of the first liquid cargo port, the third liquid cargo port is connected with the first liquid cargo port and the second liquid cargo port through liquid pipes, and the third gas cargo port is connected with the first gas cargo port and the second gas cargo port through gas pipes; the third liquid cargo port is selectively communicated with the first liquid cargo port or the second liquid cargo port, and the third gas cargo port is correspondingly selectively communicated with the first gas cargo port or the second gas cargo port, so that the liquid cargo is heated into the gas cargo by the seawater heater or the glycol heater, and the gas cargo is returned to the storage tank or output through the gas phase output port.
Preferably, a first valve is arranged on a liquid pipe communicated between the third liquid cargo port and the second liquid cargo port, a second valve is correspondingly arranged on a gas pipe communicated between the third gas cargo port and the second gas cargo port, and the first valve and the second valve are communicated or closed together, so that the glycol heater is selectively communicated with the storage tank.
Preferably, a third valve is arranged on a liquid pipe communicated between the third liquid cargo port and the first liquid cargo port, a fourth valve is correspondingly arranged on a gas pipe communicated between the third gas cargo port and the first gas cargo port, and the third valve and the fourth valve are communicated or closed together, so that the seawater heater is selectively communicated with the storage tank.
Preferably, the liquid cargo heating system further comprises: the ethylene glycol heat exchanger is internally provided with an ethylene glycol passage and a steam passage which can exchange heat; the inlet of the ethylene glycol passage is connected with the ethylene glycol outlet, the outlet of the ethylene glycol passage is connected with the ethylene glycol inlet, the inlet of the steam passage is used as a steam inlet for receiving steam, and the outlet of the steam passage is used as a steam outlet for outputting steam.
Preferably, the liquid cargo heating system further comprises a glycol tank for replenishing glycol; the outlet of the glycol tank communicates with the conduit between the glycol outlet and the inlet of the glycol passage.
Preferably, a pipeline communicating the glycol outlet and the inlet of the glycol passage is provided with a glycol pump.
Preferably, the liquid cargo heating system further comprises a booster pump, an outlet of the booster pump is communicated with the first liquid cargo port, and an inlet of the booster pump is communicated with the third liquid cargo port.
And a liquid cargo ship comprising: a seawater circulating system, a cabin steam system and the liquid cargo heating system; the seawater circulating system is used for providing seawater for the liquid cargo heating system to heat the liquid cargo; the cabin steam system is communicated with the liquid cargo heating system through a pipeline and used for providing steam for the liquid cargo heating system so as to provide heat for ethylene glycol and recovering the steam after heat exchange with the ethylene glycol.
Preferably, the liquid cargo ship is provided with a gas cargo loading and unloading station, and the gas cargo loading and unloading station is communicated with the gas phase output port through a pipeline, so that gas cargo output from the gas phase output port is conveyed ashore at the gas cargo loading and unloading station.
According to the technical scheme, the method has the following advantages that: 1. in the liquid cargo heating system, a commonly adopted seawater heater which takes seawater as a heating medium is used for heating liquid cargo, so that cargo on a ship meets the cargo receiving requirement of a land receiving tank, and meanwhile, a glycol heater is added for heating the liquid cargo, so that the cargo in the liquid cargo ship in a cold water area can also meet the cargo receiving requirement of the land receiving tank, and the problem that the liquid cargo cannot be heated in a low-temperature seawater sea area is solved; 2. the liquid cargo ship adopts two heating modes of seawater heating and glycol heating, and the liquid cargo is heated by selectively communicating the seawater heater or the glycol heater, so that the adaptability and the comprehensiveness of the liquid cargo ship are improved.
Drawings
Fig. 1 is a schematic structural diagram of a liquid cargo heating system according to an embodiment of the present application;
fig. 2 is a flow chart of a heating process of the liquid cargo heating system according to the embodiment of the present application.
The reference numerals are explained below: 100. a liquid cargo heating system; 101. a seawater heater; 1011. a seawater inlet; 1012. a seawater outlet; 1013. a first liquid cargo port; 1014. a first gas cargo port; 102. a glycol heater; 1021. an ethylene glycol inlet; 1022. an ethylene glycol outlet; 1023. a second liquid cargo port; 1024. a second gas cargo port; 103. a storage tank; 1031. a third liquid cargo port; 1032. a third gas cargo port; 104. a glycol heat exchanger; 1041. a glycol pathway; 1042. a steam passage; 1043. a steam inlet; 1044. a steam outlet; 105. an ethylene glycol pump; 106. a glycol storage tank; 107. a gas phase output pipe; 108. a liquid pipe; 1081. a first valve; 1082. a third valve; 109. a gaseous tube; 1091. a second valve; 1092. a fourth valve; 110. a booster pump; 200. a gas cargo loading and unloading station; 300. liquid cargo loading and unloading station.
Detailed Description
Exemplary embodiments that embody features and advantages of the present application will be described in detail in the following description. It is to be understood that the present application is capable of various modifications in various embodiments without departing from the scope of the application, and that the description and drawings are to be taken as illustrative and not restrictive in character.
The application provides a liquid cargo ship, which comprises a seawater circulating system, a cabin steam system and a liquid cargo heating system 100. The seawater circulation system is used to provide seawater to the liquid cargo heating system 100. The cabin steam system is in communication with the liquid cargo heating system 100 through a conduit for providing steam to the liquid cargo heating system 100 to provide heat, and for recovering the exchanged steam.
The liquid cargo ship is provided with a gas cargo loading and unloading station 200, and the liquid cargo ship loads and unloads gas-phase cargo at the gas cargo loading and unloading station 200. The gas cargo loading and unloading station 200 is connected to the liquid cargo heating system 100 through a pipeline.
The liquid cargo ship is also provided with a liquid cargo loading and unloading station 300, and the liquid cargo ship loads and unloads liquid cargo at the liquid cargo loading and unloading station 300. The liquid cargo loading and unloading station 300 is connected to the liquid cargo heating system 100 through a pipe.
The present application provides a liquid cargo heating system 100 for heating liquid cargo on a liquid cargo ship to obtain gas cargo, so that the cargo can meet the cargo receiving requirements of a land-based receiving tank, thereby enabling the liquid cargo ship to unload the liquid cargo at a dock. The liquid cargo can be liquefied petroleum gas, and correspondingly, the gas cargo is gaseous petroleum gas.
Referring to fig. 1, a liquid cargo heating system 100 of the present embodiment includes a seawater heater 101, a glycol heater 102, and a storage tank 103.
The seawater heater 101 uses seawater as a heating medium to heat the liquid cargo on the liquid cargo ship. Wherein, the seawater heater 101 is connected to the seawater circulating system to receive the seawater delivered by the seawater circulating system. In this embodiment, the seawater heater 101 may be a shell-and-tube heater.
The seawater heater 101 is provided with a seawater inlet 1011 for receiving seawater and a seawater outlet 1012 for outputting seawater. Seawater is circulated through the seawater circulation system of the tanker, enters the seawater heater 101 through the seawater inlet 1011, provides heat to the cargo, and is discharged through the seawater outlet 1012.
The seawater heater 101 is further provided with a first liquid cargo port 1013 and a first gas cargo port 1014. The liquid cargo enters the seawater heater 101 from the first liquid cargo port 1013, exchanges heat with seawater, is vaporized by heat absorption, and is discharged from the first gas cargo port 1014. At this time, by controlling the unloading speed of the seawater, the temperature of the seawater entering the seawater heater 101 is ensured to be kept above +5 ℃, and the temperature of the seawater is higher than the temperature of the liquid cargo entering the seawater heater 101, so that the seawater can meet the heat exchange demand of the seawater heater 101. The temperature of the seawater after heat exchange with the liquid cargo is reduced, and the liquid cargo absorbs the temperature of the seawater, so that the temperature is increased to be vaporized into gas cargo.
The glycol heater 102 uses glycol as a heating medium, and is also used to heat the liquid cargo on the liquid cargo ship. The glycol heater 102 may likewise be a shell and tube heater. When the liquid cargo ship is in a cold water area and the temperature of the seawater is lower than +5 ℃, the seawater heater 101 cannot work normally, and the glycol heater 102 can be used for heating the liquid cargo at the moment, so that the cargo can meet the cargo receiving requirement of the land receiving tank, and the problem that the liquid cargo cannot be heated in the low-temperature seawater sea area is solved.
The glycol heater 102 is provided with a glycol inlet 1021 for receiving glycol and a glycol outlet 1022 for outputting glycol. Glycol enters the glycol heater 102 through the glycol inlet 1021, and is discharged through the glycol outlet 1022 after heat is supplied to the liquid cargo.
The glycol heater 102 is also provided with a second liquid port 1023 and a second gas port 1024. The liquid cargo enters the glycol heater 102 from the second liquid cargo port 1023, exchanges heat with glycol, is vaporized into gas cargo by heat absorption, and is discharged from the second gas cargo port 1024. At this time, the temperature of the glycol entering the glycol heater 102 is higher than the temperature of the liquid cargo, and the glycol can transfer heat to the liquid cargo, so that the liquid cargo absorbs heat, and the temperature of the liquid cargo is increased to be vaporized into gas cargo.
Preferably, the liquid cargo heating system 100 further comprises a glycol heat exchanger 104. The glycol heat exchanger 104 may be a plate heat exchanger. The glycol heat exchanger 104 is provided with a glycol passage 1041 and a steam passage 1042, which can exchange heat.
The inlet of the ethylene glycol passage 1041 is connected with the ethylene glycol outlet 1022, and the outlet of the ethylene glycol passage 1041 is connected with the ethylene glycol inlet 1021. The inlet of the steam passageway 1042 serves as a steam inlet 1043 for receiving steam from the tanker cabin steam system, and the outlet of the steam passageway 1042 serves as a steam outlet 1044 for outputting steam which is returned to the cabin steam system. The glycol entering the glycol heat exchanger 104 provides heat to the liquid cargo, the temperature is reduced and is lower than the temperature of the steam entering the glycol heat exchanger 104, after heat exchange is carried out in the glycol heat exchanger 104, the temperature of the glycol is increased, at the moment, the glycol with the increased temperature flows back to the glycol heater 102 to heat the liquid cargo, and the glycol heater 102 can work normally.
An ethylene glycol loop is formed between the ethylene glycol heat exchanger 104 and the ethylene glycol heater 102, and ethylene glycol can be recycled. The ethylene glycol is heated by leading out one path of steam from a steam pipe in an engine room steam system of the liquid cargo ship, namely the ethylene glycol is heated by using the steam of the liquid cargo ship, so that the ethylene glycol can circularly heat the liquid cargo, and the liquid cargo heating system 100 can stably operate.
Specifically, a glycol pump 105 is disposed on the conduit connecting the glycol outlet 1022 and the inlet of the glycol passage 1041 for circulating the glycol in the loop of the glycol heater 102 and the glycol heat exchanger 104.
Further, the liquid cargo heating system 100 further includes a glycol tank 106 for replenishing glycol. The outlet of the glycol tank 106 communicates with a conduit between the glycol outlet 1022 and the inlet of the glycol passage 1041. The glycol reservoir 106 is capable of replenishing the glycol heater 102 with glycol when the amount of glycol in the glycol heater 102 is insufficient.
The tank 103 is used for storing liquid cargo.
The tank 103 is provided at the top with a third liquid cargo port 1031 and a third gas cargo port 1032. The third liquid cargo port 1031 is connected to the first liquid cargo port 1013 and the second liquid cargo port 1023 by liquid tubes 108, and the third gas cargo port 1032 is connected to the first gas cargo port 1014 and the second gas cargo port 1024 by gas tubes 109. The end of the liquid pipe 108 connected to the third liquid cargo port 1031 branches into two branches, one of which is provided with a liquid cargo pump to pump out the liquid cargo in the storage tank 103 and transport the liquid cargo to other parts of the liquid cargo heating system 100 through the liquid pipe 108, and the other is used for injecting the liquid cargo loaded from the outside into the storage tank 103.
The third liquid cargo port 1031 selectively communicates with the first liquid cargo port 1013 or the second liquid cargo port 1023, and the third gas cargo port 1032 selectively communicates with the first gas cargo port 1014 or the second gas cargo port 1024, respectively, to heat the liquid cargo into gas cargo by the seawater heater 101 or the glycol heater 102, and the gas cargo is returned to the storage tank 103 or output through the gas phase output port. The gas phase output port is an outlet of the gas phase output pipe 107 and is connected to the gas cargo loading and unloading station 200, and an inlet of the gas phase output pipe 107 is connected to the first gas cargo port 1014 or the second gas cargo port 1024. Wherein, the gas cargo output outwards is output from the gas output port through the gas output pipe 107. After being output through the gas phase output port, the gas cargo is conveyed to the gas cargo loading and unloading station 200 on the liquid cargo ship and then conveyed to the shore. It should be noted that when the gas cargo loading/unloading station 200 is loaded with gas cargo, the gas phase output port may also be used as a gas phase input port, and the gas cargo enters the storage tank 103 through a pipeline after entering the gas phase input port.
And the cargo is returned to the storage tank 103 to complete the stripping work. The tank sweeping refers to cleaning operation of the cargo hold before loading or after unloading the ship. The heated goods become high-temperature gas, get back to the interior evaporation storage tank 103 bottom residual low temperature liquid goods in the liquid trap of storage tank 103 through gas tube 109, accomplish the work of cleaning the cabin, this kind of mode of cleaning the cabin is usually to use A jar goods to clean B jar bottom residual liquid after the heating. Specifically, the cargo compressor on the tanker compresses and heats the gas in the storage tank 103, and then the gas is pumped into the storage tank 103 to sweep the tank.
Specifically, a first valve 1081 is disposed on the liquid pipe 108 communicating between the third liquid cargo port 1031 and the second liquid cargo port 1023, and a second valve 1091 is disposed on the gas pipe 109 communicating between the third gas cargo port 1032 and the second gas cargo port 1024, respectively, so that the first valve 1081 and the second valve 1091 are opened or closed together, and the glycol heater 102 is selectively communicated with the storage tank 103.
A third valve 1082 is disposed on the liquid pipe 108 communicating between the third liquid cargo port 1031 and the first liquid cargo port 1013, a fourth valve 1092 is disposed on the gas pipe 109 communicating between the third gas cargo port 1032 and the first gas cargo port 1014, and the third valve 1082 and the fourth valve 1092 are both turned on and off, so that the seawater heater 101 is selectively communicated with the storage tank 103.
Through operation valve control switching, guarantee that two kinds of heating methods can effectively switch, improve the adaptability and the comprehensiveness of liquid cargo ship. Specifically, the first valve 1081 and the second valve 1091 are controlled to be closed together, and the third valve 1082 and the fourth valve 1092 are controlled to be opened together, so that the seawater heater 101 is communicated with the storage tank 103, i.e., the liquid cargo is heated by using seawater, or the first valve 1081 and the second valve 1091 are controlled to be opened together, and the third valve 1082 and the fourth valve 1092 are controlled to be closed together, so that the glycol heater 102 is communicated with the storage tank 103, i.e., the liquid cargo is heated by using glycol.
Preferably, the liquid cargo heating system 100 further comprises a booster pump 110. The booster pump 110 has an outlet port communicating with the first liquid cargo port 1013 and an inlet port communicating with the third liquid cargo port 1031. That is, the booster pump 110 pressurizes the liquid cargo in the tank 103 and sends the pressurized liquid cargo to the seawater heater 101. The booster pump 110 is used to pressurize the liquid cargo so that the cargo unloading temperature can meet the design temperature of the land receiving tank, and the back pressure of the land receiving tank is used to determine whether to pressurize the liquid cargo by the booster pump 110. Booster pumps 110 may also pressurize the liquid cargo when the cargo is to be transported ashore without heating, and then transport to a liquid cargo loading and unloading station 300 on a liquid cargo ship, and then transport ashore.
Referring to fig. 2, the general working process of the liquid cargo heating system 100 is as follows:
s401, pumping out the liquid cargo from the storage tank 103 by using a liquid cargo pump.
The liquid cargo pumped out of the storage tank 103 is conveyed to the seawater heater 101 or the glycol heater 102 through the liquid pipe 108 for heating.
S402, selectively adopting the seawater heater 101 or the glycol heater 102 to heat the liquid cargo.
In a non-cold sea area, the liquid cargo is heated by a seawater heater 101 using seawater as a medium. At this time, the first valve 1081 and the second valve 1091 are controlled to be closed together, and the third valve 1082 and the fourth valve 1092 are controlled to be opened together, so that the seawater heater 101 is communicated with the storage tank 103.
By controlling the unloading speed of the seawater, the temperature of the seawater entering the seawater heater 101 is kept above +5 ℃, so that the seawater can meet the heat exchange demand of the seawater heater 101, the heat of the seawater is transferred to the liquid cargo, and the temperature of the liquid cargo is increased to be vaporized into gas cargo.
In cold sea areas, the liquid cargo is heated by the glycol heater 102 using glycol as a medium. At this time, the first valve 1081 and the second valve 1091 are controlled to be opened together, and the third valve 1082 and the fourth valve 1092 are controlled to be closed together, so that the glycol heater 102 communicates with the storage tank 103.
A path of steam is led out from a steam pipe in a cabin steam system of a tanker to heat ethylene glycol, and specifically, a glycol heat exchanger 104 is adopted to exchange heat between steam and ethylene glycol. The heat of the steam is transferred to the glycol, so that the temperature of the glycol entering the glycol heater 102 is higher than that of the liquid cargo, and further, the heat of the glycol is transferred to the liquid cargo, so that the temperature of the liquid cargo is increased to be vaporized into the gas cargo. The temperature of the glycol after heat exchange is reduced, the glycol returns to the glycol heat exchanger 104 to exchange heat with the steam, the temperature is increased, and the glycol enters the glycol heater 102 again to heat the liquid goods.
And S403, vaporizing the heated liquid cargo into gas cargo, returning the gas cargo to the storage tank 103 to complete the cabin sweeping operation, or outputting the gas cargo through a gas phase output port.
The liquid cargo heated by the seawater heater 101 or the glycol heater 102 is vaporized into gas cargo and returns to the storage tank 103 to complete the cabin sweeping operation, or the gas cargo is output through a gas phase output port and is conveyed to a gas cargo loading and unloading station 200 on a liquid cargo ship, and then the gas cargo is conveyed to the shore.
The application has at least the following advantages:
1. in the liquid cargo heating system 100, a commonly-used seawater heater 101 which takes seawater as a heating medium is used for heating liquid cargo, so that cargo on a ship meets the cargo receiving requirement of a land receiving tank, and meanwhile, an ethylene glycol heater 102 is additionally arranged for heating the liquid cargo, so that the cargo in the liquid cargo ship in a cold water area can also meet the cargo receiving requirement of the land receiving tank, and the problem that the liquid cargo cannot be heated in a low-temperature seawater sea area is solved.
2. Two heating modes of seawater heating and glycol heating are adopted, and the liquid cargo is heated by selectively communicating the seawater heater 101 or the glycol heater 102, so that the adaptability and the comprehensiveness of the liquid cargo ship are improved.
3. By adopting the method of operating the valve control switching, the two heating modes can be effectively switched, namely, when the seawater heater 101 is required to work, the first valve 1081 and the second valve 1091 are controlled to be closed together, the third valve 1082 and the fourth valve 1092 are controlled to be conducted together, when the glycol heater 102 is required to work, the first valve 1081 and the second valve 1091 are controlled to be conducted together, and the third valve 1082 and the fourth valve 1092 are controlled to be closed together, so that the adaptability and the comprehensiveness of the tanker are further improved.
4. One path of steam is led out from a steam pipe in an engine room steam system of the liquid cargo ship to heat the ethylene glycol, the ethylene glycol is heated by the steam of the liquid cargo ship through the ethylene glycol heat exchanger 104, the liquid cargo can be heated circularly by the ethylene glycol, and the liquid cargo heating system 100 can operate stably.
While the present application has been described with reference to several exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present application may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.
Claims (9)
1. A liquid cargo heating system having a gas phase outlet for delivering gas cargo outwardly, the liquid cargo heating system comprising:
the seawater heater is provided with a seawater inlet for receiving seawater and a seawater outlet for outputting seawater; a first liquid cargo port and a first gas cargo port are also arranged on the first liquid cargo port;
the ethylene glycol heater is provided with an ethylene glycol inlet for receiving ethylene glycol and an ethylene glycol outlet for outputting the ethylene glycol; a second liquid cargo port and a second gas cargo port are also arranged on the first gas cargo port; and
a storage tank for storing liquid cargo; a third liquid cargo port and a third gas cargo port are arranged at the top of the first liquid cargo port, the third liquid cargo port is connected with the first liquid cargo port and the second liquid cargo port through liquid pipes, and the third gas cargo port is connected with the first gas cargo port and the second gas cargo port through gas pipes;
the third liquid cargo port is selectively communicated with the first liquid cargo port or the second liquid cargo port, and the third gas cargo port is correspondingly selectively communicated with the first gas cargo port or the second gas cargo port, so that the liquid cargo is heated into the gas cargo by the seawater heater or the glycol heater, and the gas cargo is returned to the storage tank or output through the gas phase output port.
2. The liquid cargo heating system according to claim 1, wherein a first valve is disposed on a liquid pipe communicating between the third liquid cargo port and the second liquid cargo port, and a second valve is disposed on a gas pipe communicating between the third gas cargo port and the second gas cargo port, respectively, and the first valve and the second valve are opened or closed together, so that the glycol heater is selectively communicated with the storage tank.
3. The liquid cargo heating system according to claim 1, wherein a third valve is disposed on the liquid pipe communicating between the third liquid cargo port and the first liquid cargo port, and a fourth valve is disposed on the gas pipe communicating between the third gas cargo port and the first gas cargo port, respectively, and the third valve and the fourth valve are opened or closed together, so that the seawater heater is selectively communicated with the storage tank.
4. The liquid cargo heating system according to claim 1, further comprising:
the ethylene glycol heat exchanger is internally provided with an ethylene glycol passage and a steam passage which can exchange heat; the inlet of the ethylene glycol passage is connected with the ethylene glycol outlet, the outlet of the ethylene glycol passage is connected with the ethylene glycol inlet, the inlet of the steam passage is used as a steam inlet for receiving steam, and the outlet of the steam passage is used as a steam outlet for outputting steam.
5. The liquid cargo heating system according to claim 4, further comprising a glycol tank for replenishing glycol; the outlet of the glycol tank communicates with the conduit between the glycol outlet and the inlet of the glycol passage.
6. The liquid cargo heating system according to claim 4, wherein a glycol pump is provided on a pipe connecting between the glycol outlet and the inlet of the glycol passage.
7. The liquid cargo heating system according to claim 1, further comprising a booster pump, an outlet of the booster pump communicating with the first liquid cargo port, an inlet of the booster pump communicating with the third liquid cargo port.
8. A liquid cargo vessel, comprising: a seawater circulation system, a cabin steam system and a liquid cargo heating system as claimed in any one of claims 1 to 7; the seawater circulating system is used for providing seawater for the liquid cargo heating system to heat the liquid cargo; the cabin steam system is communicated with the liquid cargo heating system through a pipeline and used for providing steam for the liquid cargo heating system so as to provide heat for ethylene glycol and recovering the steam after heat exchange with the ethylene glycol.
9. The liquid cargo ship according to claim 8, wherein a gas cargo loading and unloading station is provided on the liquid cargo ship, and the gas cargo loading and unloading station communicates with the gas phase outlet through a pipe, so that gas cargo output from the gas phase outlet is transported ashore at the gas cargo loading and unloading station.
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| CN202010224408.2A CN113443117A (en) | 2020-03-26 | 2020-03-26 | Liquid cargo ship and liquid cargo heating system thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114590391A (en) * | 2022-03-25 | 2022-06-07 | 广船国际有限公司 | Cargo hold secondary heating system and boats and ships |
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