CN111891327A - Crude oil cargo hold ventilation system and offshore floating production oil storage ship comprising same - Google Patents
Crude oil cargo hold ventilation system and offshore floating production oil storage ship comprising same Download PDFInfo
- Publication number
- CN111891327A CN111891327A CN202010778138.XA CN202010778138A CN111891327A CN 111891327 A CN111891327 A CN 111891327A CN 202010778138 A CN202010778138 A CN 202010778138A CN 111891327 A CN111891327 A CN 111891327A
- Authority
- CN
- China
- Prior art keywords
- cargo tank
- crude oil
- carbon
- inert gas
- cargo
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- B63J2/02—Ventilation; Air-conditioning
- B63J2/08—Ventilation; Air-conditioning of holds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
- B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
- B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The invention discloses a crude oil cargo tank ventilation system and an offshore floating production oil storage ship comprising the same, wherein the crude oil cargo tank ventilation system comprises an inert gas generator and a carbon-hydrogen gas supply device, and the inert gas generator is communicated with a cargo tank through a pipeline; the crude oil cargo tank ventilation system also comprises a carbon-hydrogen gas supply device which is communicated with the cargo tank through a pipeline. By communicating the inert gas generator and the carbon-hydrogen gas supply device with the cargo compartment, the cargo compartment can not only displace the air in the cargo compartment by the inert gas generated in the inert gas generator, but also reduce the oxygen in the cargo compartment. Carbon hydrogen can be input into the cargo hold to replace inert gas, so that the oxygen content in the cargo hold is always lower than a critical value causing explosion, and the purpose of protecting the cargo hold is achieved. By adopting the structure, the consumption of the inert gas can be reduced, on one hand, the cost can be saved, and on the other hand, the waste gas discharged in the process of generating the inert gas can be reduced.
Description
Technical Field
The invention relates to the field of ships, in particular to a crude oil cargo tank ventilation system and an offshore floating production oil storage ship comprising the same.
Background
Units that are loaded with more than 8000 tons of crude oil, such as FPSO (floating production storage vessel), FSO (floating storage-offloading vessel), FSU (floating storage platform), etc., are equipped with an inert gas system to reduce the oxygen content in the cargo hold so that the oxygen content of the gas in the hold is not explosive. And simultaneously, the oil gas in the cabin is prevented from evaporating to the atmosphere.
In the above ships, a boiler is not generally arranged, a flue gas type inert gas system cannot be used, and only an inert gas generating device system can be used for preparing inert gas, so that the inert gas is conveyed into a cargo hold for storing crude oil to replace oxygen, and the crude oil in the cargo hold is protected. The inert gas generator is used for protecting the cargo hold by non-combustible gas generated by burning crude oil. The non-combustible gas is one or a mixture of several of nitrogen, carbon dioxide, sulfur dioxide and the like, and the mixture of one or more of the non-combustible gases is called inert gas. And only the inert gas is used for protection, so that the demand for the inert gas is very large, and the exhaust emission is large while the inert gas is prepared, so that the production cost is high on one hand, and the environment is not favorable on the other hand because only the inert gas is used for protection.
Disclosure of Invention
The invention aims to overcome the defects that in the prior art, a crude oil cargo tank ventilating system only adopts inert gas for protection, so that the production cost is high on one hand, and the environment is unfavorable on the other hand, and provides the crude oil cargo tank ventilating system and an offshore floating production oil storage ship comprising the same.
The invention solves the technical problems through the following technical scheme:
a crude oil cargo tank venting system comprising:
the inert gas generator is communicated with the cargo hold through a pipeline;
the crude oil cargo tank ventilation system is characterized by further comprising a carbon-hydrogen gas supply device, wherein the carbon-hydrogen gas supply device is communicated with the cargo tank through a pipeline.
In the scheme, the inert gas generator and the carbon-hydrogen gas supply device are communicated with the cargo compartment, so that the cargo compartment can replace air in the cargo compartment by the inert gas generated in the inert gas generator, namely, oxygen in the cargo compartment is reduced. Carbon hydrogen can be input into the cargo hold to replace inert gas, so that the oxygen content in the cargo hold is always lower than a critical value causing explosion, and the purpose of protecting the cargo hold is achieved. By adopting the structure, the consumption of the inert gas can be reduced, on one hand, the cost can be saved, and on the other hand, the waste gas discharged in the process of generating the inert gas can be reduced.
Preferably, the crude oil cargo tank ventilating system can be switched between an inert gas mode and a carbon-hydrogen gas mode;
when the crude oil cargo tank venting system is in the inert gas mode, the inert gas generator is in communication with the cargo tank and fills the cargo tank with inert gas;
and when the oxygen content in the cargo hold is lower than a preset value, entering a carbon-hydrogen mode, wherein the carbon-hydrogen gas supply device is communicated with the cargo hold and is used for filling carbon hydrogen gas into the cargo hold.
In this scheme, through adopting above mode of structure, be favorable to reducing the use amount of inert gas, and then save the cost, reduce waste gas discharge capacity.
Preferably, the crude oil cargo tank ventilation system comprises a main pipeline, the inert gas generator and the carbon-hydrogen gas supply device are both communicated with one end of the main pipeline, and the other end of the main pipeline is communicated with the cargo tank.
In the scheme, the inert gas generator and the carbon-hydrogen gas supply device share one main pipeline, so that the structure can be simplified, and the space can be further reduced.
Preferably, the crude oil cargo tank ventilation system comprises a carbon-hydrogen main pipe and an inert gas main pipe, wherein one end of the carbon-hydrogen main pipe is connected to the carbon-hydrogen gas supply device, and one end of the inert gas main pipe is connected to the inert gas generator.
In the scheme, the inert gas generator and the carbon-hydrogen gas supply device respectively use different pipelines, so that the independence of the inert gas generator and the carbon-hydrogen gas supply device is improved, and further the inert gas and the carbon-hydrogen gas can be simultaneously filled when needed.
Preferably, the crude oil cargo tank ventilation system further comprises a carbon-hydrogen gas recovery device, and the carbon-hydrogen gas recovery device is communicated with the cargo tank through the carbon-hydrogen gas main pipe.
In this scheme, set up carbon hydrogen recovery unit, can be so that the carbon hydrogen in the cargo hold is retrieved to carbon hydrogen recovery unit in, avoid polluting the atmosphere.
Preferably, one end of the carbon-hydrogen gas supply device is provided with a conveying pipeline, and the conveying pipeline is communicated with the carbon-hydrogen gas main pipe;
one end of the carbon-hydrogen gas recovery device is provided with a recovery pipeline which is communicated with the carbon-hydrogen gas main pipe;
the recovery pipeline is also communicated with the conveying pipeline.
In this scheme, adopt above-mentioned structural style for carbon hydrogen in retrieving carbon hydrogen recovery unit from the cargo hold still can continue cyclic utilization, in order to protect the cargo hold. Because the gas in the cargo hold contains the oil gas volatilized by the crude oil, the carbon and hydrogen gas discharged to the carbon and hydrogen gas recovery device is actually mixed gas of the carbon and hydrogen gas and the oil gas, and the structure can avoid the waste of the crude oil and the pollution to the atmosphere.
Preferably, the crude oil cargo tank ventilation system further comprises a discharge main, one end of the discharge main is communicated with the cargo tank, and the other end of the discharge main is communicated with the atmosphere.
In this scheme, set up and discharge the house steward to the air of cargo hold internal emission of being convenient for discharges away when filling inert gas or carbon hydrogen to the cargo hold, and then guarantees that the interior oxygen content of cargo hold is less than the default.
Preferably, at least one first discharge device is further arranged at one end of the discharge header pipe, which is far away from the cargo compartment, and the first discharge device is communicated with the discharge header pipe, and each cargo compartment corresponds to at least one first discharge device.
In this scheme, set up discharging equipment, can further improve the reliability of cabin indoor air discharge, and then guarantee that the oxygen content in the cargo hold is less than the default, and then protect the cargo hold.
Preferably, at least one second discharge device is further disposed on the main pipeline, the second discharge device is communicated with the main pipeline, and each cargo compartment corresponds to at least one second discharge device.
In the scheme, the second discharging device is arranged on the main pipeline, so that when the cabin area is filled with inert gas or carbon hydrogen, air in the main pipeline is discharged firstly, and the reliability of cabin area protection is improved.
Preferably, the hydrocarbon gas supply device is communicated with an upper crude oil processing module, the upper crude oil processing module is used for processing crude oil, and the hydrocarbon gas is derived from the upper crude oil processing module.
In the scheme, the carbon hydrogen comes from the upper crude oil treatment module, so that the carbon hydrogen generated in the crude oil treatment process of the upper crude oil treatment module is effectively utilized, the pollution to the environment is reduced, and the cost is saved.
Preferably, the upper crude processing module comprises a hydrocarbon storage area;
the carbon-hydrogen storage area is communicated with the carbon-hydrogen gas supply device;
and/or the carbon hydrogen storage area is communicated with a gas generator in the upper module of the ship.
In this scheme, adopt above-mentioned structural style, on the one hand can effectively utilize the gas that upper portion crude oil treatment module produced, on the other hand also is favorable to reducing the pollution to the environment.
Preferably, the pipeline of the inert gas generator and the pipeline of the carbon-hydrogen gas supply device are both provided with a detection device, and the detection devices are used for detecting pressure and/or flow and/or oxygen content.
Preferably, the detection device comprises an oxygen content sensor, the oxygen content sensor is connected to an air outlet of the inert gas generator, and when the oxygen content is lower than a preset value, the inert gas generator is disconnected from the cargo compartment.
In this scheme, adopt above-mentioned structural style, not only can guarantee the reliability of inert gas to the regional protection of cabin, can avoid extravagant inert gas moreover, and then save the cost.
Preferably, the detection device further comprises a pressure sensor, the pressure sensors are arranged at the positions where the inert gas generator and the carbon-hydrogen gas supply device are communicated with the cargo compartment, and when the pressure is higher than a preset value, the gas supply to the cargo compartment is stopped.
In this scheme, adopt above-mentioned structural style, on the one hand can be used to monitor the pressure in the goods cabin, and then improve the reliability to the regional protection in cabin, and on the other hand is favorable to practicing thrift and uses gas, and then saves the cost.
Preferably, the detection device further comprises a flow sensor, the flow sensors are arranged at the positions where the inert gas generator and the carbon-hydrogen gas supply device are communicated with the cargo compartment, and the flow value of the gas input into the cargo compartment is not lower than the flow value of the gas exhausted from the cargo compartment.
In this scheme, adopt above-mentioned structural style, can effectively improve the reliability to the cargo hold protection.
An offshore floating production storage vessel, characterized in that it comprises a crude oil cargo tank venting system as described above.
In this scheme, use like above ventilative system in marine floating production oil storage ship, can save the cost on the one hand, and the reducible harmful gas emission of on the other hand can then avoid the polluted environment.
On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.
The positive progress effects of the invention are as follows: according to the crude oil cargo tank ventilation system and the offshore floating production oil storage ship comprising the same, the crude oil cargo tank ventilation system is communicated with the cargo tank through the inert gas generator and the carbon-hydrogen gas supply device, so that the cargo tank can replace air in the cargo tank through the inert gas generated in the inert gas generator, namely, oxygen in the cargo tank is reduced. Carbon hydrogen can be input into the cargo hold to replace inert gas, so that the oxygen content in the cargo hold is always lower than a critical value causing explosion, and the purpose of protecting the cargo hold is achieved. By adopting the structure, the consumption of the inert gas can be reduced, on one hand, the cost can be saved, and on the other hand, the waste gas discharged in the process of generating the inert gas can be reduced.
Drawings
Fig. 1 is a schematic structural diagram of a crude oil cargo tank ventilation system in a carbon-hydrogen gas mode according to a preferred embodiment of the invention.
FIG. 2 is a schematic view of the crude oil cargo tank venting system in an inert mode according to the preferred embodiment of the present invention.
Description of reference numerals:
Carbon hydrogen gas supply device 20
Conveying pipe 201
Carbon hydrogen gas recovery device 30
Discharge header 60
Cargo hold 90
Normally open valve 1101
Normally closed valve 1102
Long open eye lens valve 1103
Normally closed glasses valve 1104
Detailed Description
The present invention will be more clearly and completely described below by way of examples and with reference to the accompanying drawings, but the present invention is not limited thereto.
As shown in fig. 1 and 2, the present embodiment provides a crude oil cargo tank ventilation system, which includes an inert gas generator 10 and a carbon-hydrogen gas supply device 20, wherein the inert gas generator 10 is communicated with a cargo tank 90 through a pipeline; the crude oil cargo tank ventilation system further comprises a carbon hydrogen gas supply device 20, and the carbon hydrogen gas supply device 20 is communicated with the cargo tank 90 through a pipeline.
By connecting the inert gas generator 10 and the carbon hydrogen gas supply 20 to the cargo compartment 90, the cargo compartment 90 is not only able to displace air from the cargo compartment 90 by means of the inert gas generated in the inert gas generator 10, but also to reduce the oxygen in the cargo compartment 90. Carbon hydrogen can also be input into the cargo hold 90 to replace inert gas, so that the oxygen content in the cargo hold 90 is always lower than the critical value causing explosion, and the purpose of protecting the cargo hold 90 is achieved. By adopting the structure, the consumption of the inert gas can be reduced, on one hand, the cost can be saved, and on the other hand, the waste gas discharged in the process of generating the inert gas can be reduced.
It should be noted that the number of the cargo holds 90 is not limited, and may be one or more, and the plurality of the inert gas generators 10 and the hydrocarbon gas supply devices 20 are all communicated with all the cargo holds 90 through pipelines, so as to ensure that each independent cargo hold 90 can be supplemented with inert gas and hydrocarbon gas, thereby enabling the cargo hold 90 to be in a low oxygen content state all the time.
In the embodiment, the crude oil cargo tank ventilation system has two modes, namely an inert gas mode and a carbon-hydrogen gas mode, and can be switched between the inert gas mode and the carbon-hydrogen gas mode. When the crude oil cargo tank 90 venting system is in an inert gas mode, the inert gas generator 10 is in communication with the cargo tank 90 and fills the cargo tank 90 with inert gas; when the oxygen content in the cargo hold 90 is lower than the preset value, the carbon-hydrogen gas mode is entered, and the carbon-hydrogen gas is communicated with the cargo hold 90 and fills the cargo hold 90 with the carbon-hydrogen gas. Through adopting above mode of structure, be favorable to reducing the use amount of inert gas, and then save the cost, reduce waste gas discharge capacity.
In the present embodiment, a valve 110 is provided on a pipeline of the inert gas generator 10 communicating with the cargo tank 90, a valve 110 is also provided on a pipeline of the hydrocarbon gas supply device 20 communicating with the cargo tank 90, and when the crude oil cargo tank ventilation system is in the inert gas mode, the valve 110 connected to the inert gas generator 10 is in a long open state, which is represented by a normally open valve 1101 in fig. 1 and 2, and the valve 110 connected to the hydrocarbon gas supply device 20 is in a normally closed state, which is represented by a normally closed valve 1102 in fig. 1 and 2 (hereinafter, the normally open valve means that the valve is in a normally open state, and the normally closed valve means that the valve is in a normally closed state, which will not be explained any more below). That is, in the inert mode, the cargo space 90 is only inflated with inert gas. However, in the hydrocarbon mode, the cargo space 90 may be filled with both the inert gas and the hydrocarbon gas. Preferably, only carbon and hydrogen are charged, so that the cost can be saved and the exhaust emission can be reduced.
The crude oil cargo tank ventilation system comprises a main pipeline, wherein the inert gas generator 10 and the carbon-hydrogen gas supply device 20 are communicated with one end of the main pipeline, and the other end of the main pipeline is communicated with a cargo tank 90. The inert gas generator 10 and the hydrocarbon gas supply device 20 share a common duct, which simplifies the structure and thus reduces the space. Of course, the crude oil cargo tank ventilation system may also comprise a carbon hydrogen main and an inert gas main 50, wherein one end of the carbon hydrogen main is connected to the carbon hydrogen supply device 20, and one end of the inert gas main 50 is connected to the inert gas generator 10. The inert gas generator 10 and the carbon-hydrogen gas supply device 20 respectively use different pipelines, so that the independence of the inert gas generator 10 and the carbon-hydrogen gas supply device 20 is improved, and further, the inert gas and the carbon-hydrogen gas can be simultaneously filled when needed.
That is, the connection between the inert gas generator 10 and the hydrocarbon gas supply device 20 and the cargo space 90 is not limited, and may be a common pipe or different pipes. In this embodiment, different pipes are selected to be used.
In this embodiment, the crude oil cargo tank ventilation system further comprises a carbon-hydrogen gas recovery device 30, and the carbon-hydrogen gas recovery device 30 is communicated with the cargo tank 90 through a carbon-hydrogen gas main pipe. The carbon-hydrogen recovery device 30 is arranged, so that carbon-hydrogen in the cargo hold 90 can be recovered to the carbon-hydrogen recovery device 30, and the atmosphere pollution is avoided. One end of the carbon-hydrogen gas supply device 20 is provided with a conveying pipeline 201, and the conveying pipeline 201 is communicated with a carbon-hydrogen gas main pipe; a recovery pipeline 301 is arranged at one end of the carbon-hydrogen recovery device 30, and the recovery pipeline 301 is communicated with a carbon-hydrogen main pipe; the recovery pipe 301 is also in communication with the delivery pipe 201. By adopting the structure form, the carbon-hydrogen gas recovered from the cargo hold 90 into the carbon-hydrogen gas recovery device 30 can be continuously recycled to protect the cargo hold 90. Since the gas in the cargo hold 90 contains crude oil vapor, the hydrocarbon discharged into the hydrocarbon recovery device 30 is actually a mixed gas of hydrocarbon and oil gas, and thus the above structure can avoid not only the waste of crude oil but also the pollution to the atmosphere.
Furthermore, the crude oil cargo tank venting system further includes a discharge header 60, one end of the discharge header 60 being in communication with the cargo tank 90 and the other end of the discharge header 60 being in communication with the atmosphere. A discharge header 60 is provided to facilitate the discharge of air from the cargo compartment 90 during the filling of the cargo compartment 90 with an inert gas or a carbon-hydrogen gas, thereby ensuring that the oxygen content in the cargo compartment 90 is below a predetermined value.
The end of the discharge manifold 60 facing away from the cargo compartment 90 is also provided with at least one first discharge device 70, the first discharge device 70 being in communication with the discharge manifold 60, and each cargo compartment 90 corresponding to at least one first discharge device 70. Set up discharging equipment, can further improve the reliability that the cabin indoor air discharged, and then guarantee that the oxygen content in cargo hold 90 is less than the default, and then protect cargo hold 90. At least one second discharge device 120 is also provided on the main conduit, the second discharge device 120 being in communication with the main conduit, and at least one second discharge device 120 for each cargo compartment 90. The second exhaust device 120 is provided on the main duct so that when the cabin region is filled with the inert gas or the hydrocarbon gas, the air in the main duct is exhausted first, thereby improving the reliability of the protection of the cabin region.
It should be noted that the carbon hydrogen gas supply device 20 is connected to the upper crude oil processing module, the upper crude oil processing module is used for processing crude oil, and the carbon hydrogen gas is from the upper crude oil processing module. The carbon hydrogen comes from the upper crude oil treatment module, so that the carbon hydrogen generated in the crude oil treatment process of the upper crude oil treatment module is effectively utilized, the pollution to the environment is reduced, and the cost is saved.
Wherein the upper crude oil processing module comprises a carbon hydrogen gas storage area; the carbon hydrogen storage area is communicated with a carbon hydrogen supply device 20; and the carbon hydrogen storage area is also communicated with a gas generator in the upper module of the ship. By adopting the structure, on one hand, the gas generated by the upper crude oil processing module can be effectively utilized, and on the other hand, the pollution to the environment is reduced.
In the embodiment, the pipeline of the inert gas generator 10 and the pipeline of the hydrocarbon gas supply device 20 are provided with a detection device 80, and the detection device 80 is used for detecting the pressure, the flow rate and the oxygen content. The sensing device 80 includes an oxygen content sensor 801, the oxygen content sensor 801 being coupled to an air outlet of the inert gas generator 10 such that the inert gas generator 10 is disconnected from the cargo compartment 90 when the oxygen content is below a predetermined value. By the arrangement, the reliability of the protection of the inert gas on the cabin area can be ensured, the waste of the inert gas can be avoided, and the cost is saved. The detection device 80 further comprises a pressure sensor 802, and the pressure sensors 802 are arranged at the positions where the inert gas generator 10 and the carbon-hydrogen gas supply device 20 are communicated with the cargo compartment 90, and stop supplying gas to the cargo compartment 90 when the pressure is higher than a preset value. Set up pressure sensor 802, on the one hand can be used to monitor the pressure in cargo hold 90, and then improve the reliability to the regional protection in cabin, and on the other hand is favorable to using gas sparingly, and then saves the cost. The sensing device 80 further includes a flow sensor 803, and the flow sensors 803 are disposed at positions where the inert gas generator 10 and the carbon-hydrogen gas supply device 20 communicate with the cargo compartment 90, so that the flow value of the gas input into the cargo compartment 90 is not lower than the flow value of the gas discharged from the cargo compartment 90. The provision of the flow sensor 803 can effectively improve the reliability of protection of the cargo compartment 90.
The present embodiment also provides an offshore floating production storage vessel comprising a crude oil cargo tank venting system as described above. The ventilation system is used in the offshore floating production oil storage ship, so that on one hand, the cost can be saved, and on the other hand, the harmful gas discharge amount can be reduced, and the environment pollution can be avoided.
The operation principle of the ventilation system of the crude oil cargo hold is as follows:
the inert gas generator 10 uses carbon dioxide, sulfur dioxide, nitrogen and the like generated by burning crude oil as inert gas, and the inert gas generator 10 is communicated with an inert gas main pipe 50, then is connected with the inert gas main pipe 50 through different branch pipelines and then is communicated with different cargo holds 90. A valve 110 is provided at the connection of the inert gas generator 10 to the inert gas main 50, while a separate shut-off valve and a glasses valve are connected to the respective branch pipes extending to the cargo compartment 90.
The hydrocarbon gas is derived from the hydrocarbon gas generated by the upper crude oil processing module, and the hydrocarbon gas supply device in the embodiment is a hydrocarbon gas storage area on the upper crude oil processing module. The carbon-hydrogen gas storage area is connected with a carbon-hydrogen gas main pipe through a pipeline, different branch pipelines are connected to the carbon-hydrogen gas main pipe, and then the branch pipelines are communicated with different cargo holds 90. A valve 110 is also provided at a portion where the hydrocarbon storage area is connected to the hydrocarbon main pipe, and a separation cut-off valve and a glasses valve are connected to portions of the respective branch pipes extending to the cargo compartment 90.
When the oxygen content in the cargo compartment 90 is higher than the preset value, the ventilation system is firstly set in the inert gas mode, at this time, as shown in fig. 2, the valves 110 of the inert gas generator 10 connected with the inert gas main pipe 50 are all normally open valves 1101, that is, in a normally open state, meanwhile, the valves 110 on the branch pipes connected with the inert gas main pipe 50 in each cargo compartment 90 are also normally open valves, and accordingly, the glasses valves on the branch pipes are long-open glasses valves 1103. However, all the valves 110 connected to the hydrocarbon gas supply device 20 are normally closed valves 1102, i.e., are normally closed. That is, in this state, only the inert gas is supplied to the cargo compartment 90, and at the same time, the inert gas displaces the air in the cargo compartment 90 out of the cargo compartment 90, and the air in the cargo compartment 90 is discharged from the exhaust manifold, and the valve 110 in the cargo compartment 90 connected to the exhaust manifold is opened. During the process of filling the inert gas into the cargo compartment 90, the oxygen content sensor 801 monitors the oxygen content in the inert gas generated by the inert gas generator 10 in real time, when the oxygen content is higher than a preset value, the inert gas filling into the cargo compartment 90 needs to be stopped, and the inert gas filling into the cargo compartment 90 can be continued until the oxygen content reaches the standard. The flow sensor 803 detects the flow rate of the inert gas, and the flow rate of the inert gas charged into the cargo compartment 90 is not less than the discharge amount of the air in the cargo compartment 90. The filling of the cargo space 90 with the inert gas is stopped when the pressure of the inert gas is lower than the pressure within the cargo space 90. Also, when the oxygen content in the cargo tank 90 is lower than a preset value, the ventilation system may be switched to the hydrocarbon gas mode.
In the hydrocarbon mode, as shown in fig. 1, the valve 110 of the inert gas generator 10 connected to the inert gas manifold 50 is a normally closed valve 1102, while the valve 110 of the branch line of each chamber connected to the inert gas manifold 50 is also a normally closed valve 1102, and the corresponding glasses valve of the branch line is also a normally closed glasses valve 1104. In the hydrocarbon gas mode, the valve 110 of the hydrocarbon gas supply device 20 connected to the hydrocarbon main pipe 40 is a normally open valve 1101, the valve 110 of the branch pipe connected to the hydrocarbon main pipe 40 in each chamber is also the normally open valve 1101, and the spectacle valve of the branch pipe is also a long-open spectacle valve 1103. During this process, the inert gas in the chamber is exhausted from the main exhaust pipe. After the inert gas in the chamber is completely replaced, the valve 110 connected to the exhaust manifold is closed, and the valve 110 on each branch pipe is closed.
Since the air pressure in the cargo compartment 90 varies with the temperature in the cargo compartment 90, when the air pressure in the cargo compartment 90 is lower than a predetermined value, the valve 110 on the branch pipe connected to the main hydrocarbon pipe 40 in the compartment needs to be opened to replenish the carbon and hydrogen gas in the compartment. When the pressure in the cabin is higher than the preset value, the valve 110 on the carbon-hydrogen gas recovery device 30 needs to be opened to recover the carbon-hydrogen gas in the cabin into the carbon-hydrogen gas recovery device 30, and the carbon-hydrogen gas recovery can be stopped when the pressure in the cabin reaches the preset value.
During oil unloading, since the space in the cargo hold 90 is larger and larger as the crude oil flows out, it is necessary to fill the cargo hold 90 with carbon hydrogen gas at this time to prevent outside air from entering the cargo hold 90; during the loading process, the space in the cargo hold 90 is smaller and smaller due to the inflow of crude oil, and at this time, the hydrocarbon gas in the cargo hold 90 needs to be recovered into the hydrocarbon gas recovery device 30. Of course, the hydrocarbon gas in the hydrocarbon gas recovery device 30 can be refilled into the cargo compartment 90 for reuse through a pipeline connected to the hydrocarbon gas supply device 20.
By adopting the structure, the carbon and hydrogen generated by the upper module can be effectively utilized, so that inert gas is saved, and the emission of the carbon and hydrogen is reduced. In the process of recovering the hydrocarbon gas, the gas in the cargo hold 90 is a mixture of the hydrocarbon gas and the oil gas (generated by the volatilization of the crude oil), so the hydrocarbon gas is recycled by adopting the hydrocarbon gas recovery device 30, and the waste of the oil gas and the pollution of the oil gas to the environment can be avoided.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (16)
1. A crude oil cargo tank venting system comprising:
the inert gas generator is communicated with the cargo hold through a pipeline;
the crude oil cargo tank ventilation system is characterized by further comprising a carbon-hydrogen gas supply device, wherein the carbon-hydrogen gas supply device is communicated with the cargo tank through a pipeline.
2. The crude oil cargo tank venting system of claim 1,
the crude oil cargo tank ventilation system can be switched between an inert gas mode and a carbon-hydrogen gas mode;
when the crude oil cargo tank venting system is in the inert gas mode, the inert gas generator is in communication with the cargo tank and fills the cargo tank with inert gas;
and when the oxygen content in the cargo hold is lower than a preset value, entering a carbon-hydrogen mode, wherein the carbon-hydrogen gas supply device is communicated with the cargo hold and is used for filling carbon hydrogen gas into the cargo hold.
3. The crude oil cargo tank venting system of claim 1 including a manifold, said inert gas generator and said hydrocarbon gas supply being in communication with one end of said manifold, the other end of said manifold being in communication with said cargo tank.
4. The crude oil cargo tank venting system as defined in claim 1 or 3 wherein said crude oil cargo tank venting system comprises a carbon hydrogen main and an inert gas main, one end of said carbon hydrogen main being connected to said carbon hydrogen gas supply means and one end of said inert gas main being connected to said inert gas generator.
5. The crude oil cargo tank venting system of claim 4 further comprising a hydrocarbon recovery unit in communication with said cargo tank through said hydrocarbon header.
6. The crude oil cargo tank venting system of claim 5,
one end of the carbon-hydrogen gas supply device is provided with a conveying pipeline which is communicated with the carbon-hydrogen gas main pipe;
one end of the carbon-hydrogen gas recovery device is provided with a recovery pipeline which is communicated with the carbon-hydrogen gas main pipe;
the recovery pipeline is also communicated with the conveying pipeline.
7. The crude oil cargo tank venting system of claim 1 further comprising a discharge header, one end of said discharge header being in communication with said cargo tank and the other end of said discharge header being in communication with the atmosphere.
8. The crude oil cargo tank venting system as set forth in claim 7 wherein said discharge header is further provided with at least one first discharge means at an end thereof facing away from said cargo tank, said first discharge means being in communication with said discharge header, each of said cargo tanks corresponding to at least one of said first discharge means.
9. The crude oil cargo tank venting system as set forth in claim 3 wherein said main conduit is further provided with at least one second drain, said second drain being in communication with said main conduit, at least one second drain for each of said cargo tanks.
10. The crude oil cargo tank venting system of claim 1 wherein the hydrocarbon gas supply is in communication with an upper crude oil processing module for processing crude oil from which the hydrocarbon gas originates.
11. The crude oil cargo tank venting system of claim 10 wherein the upper crude oil processing module comprises a carbon hydrogen gas storage area;
the carbon-hydrogen storage area is communicated with the carbon-hydrogen gas supply device;
and/or the carbon hydrogen storage area is communicated with a gas generator in the upper module of the ship.
12. The crude oil cargo tank venting system of claim 1 wherein the inert gas generator conduit and the hydrocarbon gas supply conduit are provided with sensing means for sensing pressure and/or flow and/or oxygen content.
13. The crude oil cargo tank venting system of claim 12 wherein said sensing means comprises an oxygen content sensor coupled to an air outlet of said inert gas generator, said inert gas generator being disconnected from said cargo tank when said oxygen content is below a predetermined value.
14. The crude oil cargo tank venting system as defined in claim 12 wherein said sensing means further comprises a pressure sensor, said pressure sensor being disposed at a location where said inert gas generator and said hydrocarbon gas supply means communicate with said cargo tank, whereby gas supply to said cargo tank is stopped when said pressure is above a predetermined value.
15. The crude oil cargo tank venting system of claim 12 wherein said sensing means further comprises a flow sensor, said flow sensor being positioned at a location where said inert gas generator and said hydrocarbon gas supply means communicate with said cargo tank, wherein the flow value of gas input to said cargo tank is not lower than the flow value of gas discharged from said cargo tank.
16. An offshore floating production storage vessel comprising a crude cargo tank venting system as claimed in any one of claims 1 to 15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010778138.XA CN111891327A (en) | 2020-08-05 | 2020-08-05 | Crude oil cargo hold ventilation system and offshore floating production oil storage ship comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010778138.XA CN111891327A (en) | 2020-08-05 | 2020-08-05 | Crude oil cargo hold ventilation system and offshore floating production oil storage ship comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111891327A true CN111891327A (en) | 2020-11-06 |
Family
ID=73246766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010778138.XA Pending CN111891327A (en) | 2020-08-05 | 2020-08-05 | Crude oil cargo hold ventilation system and offshore floating production oil storage ship comprising same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111891327A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113859507A (en) * | 2021-08-31 | 2021-12-31 | 广州文冲船舶修造有限公司 | Rust-resistant dehumidification system in cabin |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2044184A (en) * | 1979-02-17 | 1980-10-15 | British Petroleum Co | Inert gas supply and salvage system for oil tankers |
| US5524456A (en) * | 1995-10-20 | 1996-06-11 | Public Service Marine Inc. | Pressure tank recycle system |
| CN1835901A (en) * | 2003-06-19 | 2006-09-20 | 切夫里昂美国公司 | Use of waste nitrogen from air separation units for blanketing cargo and ballast tanks |
| WO2006121343A1 (en) * | 2005-05-09 | 2006-11-16 | Vetco Gas Technology As | Method and device for handling hydrocarbon gases |
| US20080011219A1 (en) * | 2006-06-29 | 2008-01-17 | Jos Bronneberg | Enhanced cargo venting system |
| CN101224819A (en) * | 2006-10-26 | 2008-07-23 | 油罐通风公司 | Process and system for gas freeing on board of a vessel or other installation |
| CN104401454A (en) * | 2014-09-28 | 2015-03-11 | 中国船舶工业系统工程研究院 | Method for inerting nitrogen in oil tank |
| CN108137132A (en) * | 2015-11-05 | 2018-06-08 | 现代重工业株式会社 | Gas handling system and the ship for including it |
| CN108290623A (en) * | 2015-11-27 | 2018-07-17 | 巴布科克知识产权管理（第）有限公司 | The method that VOC is used as oil tank blanketing gas |
| CN109263845A (en) * | 2018-11-06 | 2019-01-25 | 南通中远海运川崎船舶工程有限公司 | The control main valve ventilation of room structure and method of ventilation of double fuel powered ship |
-
2020
- 2020-08-05 CN CN202010778138.XA patent/CN111891327A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2044184A (en) * | 1979-02-17 | 1980-10-15 | British Petroleum Co | Inert gas supply and salvage system for oil tankers |
| US5524456A (en) * | 1995-10-20 | 1996-06-11 | Public Service Marine Inc. | Pressure tank recycle system |
| CN1835901A (en) * | 2003-06-19 | 2006-09-20 | 切夫里昂美国公司 | Use of waste nitrogen from air separation units for blanketing cargo and ballast tanks |
| WO2006121343A1 (en) * | 2005-05-09 | 2006-11-16 | Vetco Gas Technology As | Method and device for handling hydrocarbon gases |
| US20080011219A1 (en) * | 2006-06-29 | 2008-01-17 | Jos Bronneberg | Enhanced cargo venting system |
| CN101224819A (en) * | 2006-10-26 | 2008-07-23 | 油罐通风公司 | Process and system for gas freeing on board of a vessel or other installation |
| CN104401454A (en) * | 2014-09-28 | 2015-03-11 | 中国船舶工业系统工程研究院 | Method for inerting nitrogen in oil tank |
| CN108137132A (en) * | 2015-11-05 | 2018-06-08 | 现代重工业株式会社 | Gas handling system and the ship for including it |
| CN108290623A (en) * | 2015-11-27 | 2018-07-17 | 巴布科克知识产权管理（第）有限公司 | The method that VOC is used as oil tank blanketing gas |
| CN109263845A (en) * | 2018-11-06 | 2019-01-25 | 南通中远海运川崎船舶工程有限公司 | The control main valve ventilation of room structure and method of ventilation of double fuel powered ship |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113859507A (en) * | 2021-08-31 | 2021-12-31 | 广州文冲船舶修造有限公司 | Rust-resistant dehumidification system in cabin |
| CN113859507B (en) * | 2021-08-31 | 2022-11-08 | 广州文冲船舶修造有限公司 | Rust-resistant dehumidification system in cabin |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR102204875B1 (en) | A system for emergency discharging lpg and the ship or offshore structure including the same | |
| CN104956141B (en) | The use of liquid piston is the system and method that compression pressure container refuels | |
| US20090288426A1 (en) | Method and System for Delivering Gas to Consumers, and Use Thereof | |
| EP4353584A1 (en) | Ship | |
| KR20130049086A (en) | Inert gas supply system for oil tanker | |
| CN111891327A (en) | Crude oil cargo hold ventilation system and offshore floating production oil storage ship comprising same | |
| WO2013176413A1 (en) | Nitrogen generation, storage, and supply system for tanker ships, and method for controlling same | |
| KR20210145035A (en) | Fuel supply system for vessel | |
| CN106458295A (en) | Nitrogen gas supply equipment for bulk carrier | |
| KR20130049085A (en) | Inert gas supply system for oil tanker | |
| KR200476889Y1 (en) | Venting apparatus for cargo tanks | |
| JP2011178250A (en) | System and method for storing and supplying inert gas | |
| CN106687738B (en) | Liquefy hydrogen delivery system | |
| CN116624759A (en) | Methanol filling system and inerting monitoring method | |
| KR20130031503A (en) | Liquefied gas cargo surge pressure control system in emergency | |
| KR101973039B1 (en) | Inert gas transportation apparatus of liquid cargo for vessel and the operating method of it | |
| CN115158539A (en) | Arrangement of methanol fuel containment and supply system of dual-fuel large container ship | |
| JP2009061402A (en) | Pier facilities and hydrocarbon recovery system | |
| KR102297872B1 (en) | Fuel gas supply system of ship | |
| KR102553556B1 (en) | Fuel supply system and vessel including the same | |
| KR101853943B1 (en) | Generation Facilities Integrated Vessel | |
| KR101924378B1 (en) | Marine structure | |
| KR102651090B1 (en) | Double Wall Pipe Purging System For Ammonia Fuelled ship and Method Thereof | |
| KR101818028B1 (en) | Inert Gas System for Tanker | |
| KR102663784B1 (en) | Double Pipe System For Ship, Installation Method, and Ammonia Discharge Method Thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201106 |