A steam heating cylinder for a ship fuel tank and its usage method

Abstract

The present invention relates to the technical field of marine auxiliary equipment, and particularly relates to a steam heating cylinder for a marine fuel oil tank and a using method thereof. The steam heating cylinder includes a cylinder body, an upper cover arranged at the upper port of the cylinder body, a lower cover arranged at the lower port of the cylinder body, and a plurality of oil pipes arranged at intervals and erected inside the cylinder body. The upper ends of the oil pipes extend upward out of the upper cover, and the lower ends of the oil pipes extend downward out of the lower cover. A steam inlet pipe and a steam outlet pipe are respectively arranged on the cylinder body. Among them, steam buffer baffles are also arranged at intervals at the position of the mouth of the steam inlet pipe inside the cylinder body, and a plurality of dispersion holes are formed in the steam buffer baffles. The present invention overcomes the shortcomings of the existing steam coil heater, thereby improving the reliability of the heater.

Description

Technical Field

[0001] The present invention relates to the technical field of marine auxiliary equipment, and particularly relates to a steam heating cylinder for a marine fuel tank and a using method thereof. Background Art

[0002] Currently, most marine fuel tanks adopt the steam coil heating method. The steam coil heater used in the steam coil heating method has a complex structure, occupies a large space, is inconvenient to maintain, and has a lot of in-field and out-field operations and many welding points. The welding quality cannot be guaranteed, thus increasing accidental leakage points. The excessive bending of the pipeline also increases the fatigue strength of the steam coil and is prone to cause brittle fracture of the pipeline, resulting in steam leakage, and further polluting the quality of the fuel in the oil tank. Summary of the Invention

[0003] In order to solve the above problems, the present invention provides a steam heating cylinder for a marine fuel tank and a using method thereof, aiming to overcome the disadvantages of the existing steam coil heater and further improve the reliability of the heater. The specific technical solutions are as follows:

[0004] A steam heating cylinder for a marine fuel tank includes a cylinder body, an upper cover provided at the upper port of the cylinder body, a lower cover provided at the lower port of the cylinder body, and a plurality of oil pipes vertically arranged at intervals inside the cylinder body. The upper ends of the oil pipes extend upward out of the upper cover, and the lower ends of the oil pipes extend downward out of the lower cover. A steam inlet pipe and a steam outlet pipe are respectively provided on the cylinder body. Among them, steam buffer baffles are also arranged at intervals at the position of the mouth of the steam inlet pipe inside the cylinder body, and a plurality of dispersion holes are provided on the steam buffer baffles.

[0005] The above fuel tank steam heating cylinder adopts a cylindrical heater structure. The cylinder body is installed at the bottom of the fuel tank. The steam inlet pipe is connected to steam, and the steam heats the oil pipes. The fuel flows inside the oil pipes. The temperature of the steam inside the cylinder body is transferred to the fuel inside the oil pipes through heat transfer, realizing a rapid increase in the fuel temperature and reducing the fuel viscosity. The fuel in the fuel tank can circulate in the fuel tank through the oil pipes. The low-temperature fuel enters from below the oil pipes, and the high-temperature fuel exits from above the oil pipes. And the fuel precipitation and the fuel level in the daily use tank are higher than the top of the steam heating cylinder, which can ensure the circulation of the fuel in the tank.

[0006] Preferably, the steam inlet pipe is connected to the upper part of the side wall of the cylinder body, and the steam outlet pipe is connected to the lower part of the cylinder body.

[0007] In the present invention, a plurality of support feet are vertically connected downward to the lower cover of the cylinder body.

[0008] As a further improvement of the present invention, an upper partition is further provided at a position in the cylinder body close to the upper cover. The upper end of the oil pipe passes upward through the upper partition and extends out of the upper cover, and an upper sealing space is formed between the upper cover and the upper partition.

[0009] Similarly, a lower partition is further provided at a position in the cylinder body close to the lower cover. The lower end of the oil pipe passes upward through the lower partition and extends out of the lower cover, and a lower sealing space is formed between the lower cover and the lower partition.

[0010] As a further improvement of the present invention, leak detection devices are respectively provided in the upper sealing space and the lower sealing space. The leak detection device includes a resistance detection sensor inserted into the upper sealing space or the lower sealing space for detecting the internal resistance of the sealing space.

[0011] Preferably, the resistance detection sensor is a pair of conductive probes arranged at intervals, and an insulating and sealed connection is provided between the conductive probes and the cylinder wall of the cylinder body.

[0012] As a further improvement of the present invention, resistance auxiliary detection and verification powders are respectively filled in the upper sealing space and the lower sealing space. The resistance auxiliary detection and verification powder includes a layer of water tank repair powder and a layer of dry bentonite powder arranged in layers; wherein, a layer of water tank repair powder in the upper sealing space is located below the layer of dry bentonite powder, and a layer of water tank repair powder in the lower sealing space is located above the layer of dry bentonite powder.

[0013] Preferably, a high-temperature resistant microporous membrane for the leakage medium to pass through is provided between the layer of water tank repair powder and the layer of dry bentonite powder.

[0014] In the present invention, the resistance detection sensor is connected to the leakage monitoring system of the steam heating cylinder of the ship fuel tank.

[0015] Preferably, one of the pair of conductive probes of the resistance detection sensor is inserted into the layer of water tank repair powder, and the other conductive probe is inserted into the layer of dry bentonite powder.

[0016] In the present invention, the relevant connections between the cylinder body, the cover plates (including the upper cover and the lower cover), the partitions (including the upper partition and the lower partition), the oil pipe, and the support feet are all welded connections.

[0017] Compared with the conventional steam coil heater, the steam heating cylinder has the following characteristics: the steam heating cylinder is small in volume, simple in structure and convenient for hoisting, while the steam coil heater occupies a large space and is not conducive to on-site operation; the number of installed steam heating cylinders can be increased or decreased according to the operating sea area of the ship to improve energy utilization efficiency; after the hydraulic test of the steam heating cylinder, the shipyard only needs to ensure the weld performance at the interface, thereby reducing the risk of leakage.

[0018] A method for using a steam heating cylinder for a ship fuel tank includes the following steps:

[0019] (1) Installation: Install the steam heating cylinder into the fuel tank, connect the steam inlet pipe and the steam outlet pipe, and connect the resistance detection sensor on the steam heating cylinder to the leakage monitoring system;

[0020] (2) Fuel injection: Inject fuel into the ship fuel tank to ensure that the fuel level is higher than the top of the steam heating cylinder;

[0021] (3) Fuel circulation heating: Connect the steam inlet pipe, steam enters the inside of the cylinder body, heats the oil pipe and then the steam discharges outward from the steam outlet pipe, and the fuel in the oil pipe is heated; the fuel flows in the oil pipe, and the temperature of the steam in the cylinder body is transferred to the fuel by heat transfer to quickly increase the fuel temperature and reduce the fuel viscosity. The fuel circulates in the fuel tank through the oil pipe. The low-temperature fuel enters from below the oil pipe, and the high-temperature fuel exits from above the oil pipe, forming a circulating heating of the fuel in the tank;

[0022] (4) Steam leakage self-inspection and alarm: When the steam inside the cylinder body leaks into the upper sealed space or the lower sealed space, the resistance between a pair of conductive probes located in the upper sealed space or the lower sealed space will change; the leakage monitoring system issues an alarm message to remind the equipment maintenance personnel to handle it.

[0023] When steam leakage occurs, the steam first enters the internal part of the water tank repair powder in one layer of the upper sealed space or the lower sealed space, and then penetrates through the high-temperature resistant microporous membrane into the dry bentonite powder in one layer, causing the dry bentonite powder to expand. The expansion of the dry bentonite powder plays a role in extruding the water tank repair powder in one layer. The water tank repair powder mixed with water vapor enters the welding cracks between the upper partition or the lower partition and the oil pipe or the cylinder body under the action of the extrusion force, thereby blocking the cracks and playing a role in stopping or delaying steam leakage.

[0024] In addition, when the fuel outside the cylinder body leaks into the upper sealed space or the lower sealed space, it will also cause the resistance between a pair of conductive probes in the upper sealed space or the lower sealed space to change; the leakage monitoring system issues an alarm message to remind the equipment maintenance personnel to handle it. The handling method can be to replace the steam heating cylinder as a whole.

[0025] The beneficial effects of the present invention are as follows:

[0026] First, a steam heating cylinder for a ship fuel tank and its usage method according to the present invention adopt a cylindrical heater structure, which has advantages such as simple structure, small floor space, and convenient maintenance compared with traditional steam coil heaters.

[0027] Second, a steam heating cylinder for a ship fuel tank and its usage method according to the present invention adopt a cylindrical heater structure, which is more convenient to install compared with traditional steam coil heaters, reduces the workload of on-site installation and welding operations of ship auxiliary equipment, is beneficial to ensuring welding quality, and reduces the possibility of steam leakage.

[0028] Third, a steam heating cylinder for a ship fuel tank and its usage method according to the present invention overcomes the possibility of fatigue failure and brittle fracture easily caused by excessive bending of pipelines in steam coil heaters, thereby avoiding the phenomenon of steam leakage polluting the fuel in the fuel tank.

[0029] Fourth, a steam heating cylinder for a ship fuel tank and its usage method according to the present invention are provided with an upper sealed space and a lower sealed space on the cylinder body, further improving the reliability of the steam heating cylinder in preventing steam leakage.

[0030] Fifth, a steam heating cylinder for a ship fuel tank and its usage method according to the present invention are provided with leakage detection devices in the upper sealed space and the lower sealed space, which can achieve early warning for possible steam leakage, thereby greatly improving the usage reliability of the steam heating cylinder.

[0031] Sixth, a steam heating cylinder for a ship fuel tank and its usage method according to the present invention are filled with resistance-assisted detection and verification powder in the upper sealed space and the lower sealed space. The resistance-assisted detection and verification powder can achieve automatic plugging of leaks after steam leaks into the sealed space. This further improves the reliability of the steam heating cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a schematic structural diagram of a steam heating cylinder for a ship fuel tank according to the present invention;

[0033] Figure 2 is Figure 1 the top view of

[0034] Figure 3 is on the basis of Figure 1 a further improved schematic structural diagram;

[0035] Figure 4 is on the basis of Figure 3 a further improved schematic structural diagram;

[0036] Figure 5 is Figure 4 a partially enlarged view of

[0037] In the figure: 1, cylinder body; 2, upper cover; 3, lower cover; 4, oil pipe; 5, steam inlet pipe; 6, steam outlet pipe; 7, steam buffer baffle; 8, dispersion holes; 9, support feet; 10, upper partition board; 11, upper sealing space; 12, lower partition board; 13, lower sealing space; 14, leakage detection device; 15, resistance detection sensor; 16, conductive probe; 17, insulating and sealed connection; 18, resistance-assisted detection and verification powder; 19, first-layer water tank repair powder; 20, first-layer dry bentonite powder; 21, high-temperature resistant microporous membrane sheet. Specific embodiments

[0038] The following will further describe the specific embodiments of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and cannot be used to limit the protection scope of the present invention.

[0039] Embodiment 1:

[0040] As Figures 1 to 5 shown in the figure is an embodiment of a steam heating cylinder for a ship fuel tank of the present invention, which includes a cylinder body 1, an upper cover 2 provided at the upper port of the cylinder body 1, a lower cover 3 provided at the lower port of the cylinder body 1, and a plurality of oil pipes 4 vertically arranged at intervals inside the cylinder body 1. The upper end of the oil pipe 4 extends upward out of the upper cover 2, and the lower end of the oil pipe 4 extends downward out of the lower cover 3. A steam inlet pipe 5 and a steam outlet pipe 6 are respectively provided on the cylinder body 1. Among them, a steam buffer baffle 7 is also provided at intervals at the position of the mouth of the steam inlet pipe 5 inside the cylinder body 1, and a plurality of dispersion holes 8 are opened on the steam buffer baffle 7.

[0041] The above-mentioned steam heating cylinder for the fuel tank adopts a cylindrical heater structure. The cylinder body 1 is installed at the bottom of the fuel tank. The steam inlet pipe 5 is connected to steam, and the steam heats the oil pipe 4. The fuel flows inside the oil pipe 4. The temperature of the steam in the cylinder body 1 is transferred to the fuel inside the oil pipe 4 by heat transfer, realizing the rapid increase of the fuel temperature and reducing the fuel viscosity. The fuel in the fuel tank can circulate in the fuel tank through the oil pipe 4. The low-temperature fuel enters from below the oil pipe 4, and the high-temperature fuel exits from above the oil pipe 4. Moreover, the fuel precipitation and the fuel level in the daily use tank are higher than the top of the steam heating cylinder, which can ensure the fuel circulation in the tank.

[0042] Preferably, the steam inlet pipe 5 is connected to the upper part of the side wall of the cylinder body 1, and the steam outlet pipe 6 is connected to the lower part of the cylinder body 1.

[0043] In this embodiment, a plurality of support feet 9 are vertically connected downward to the lower cover 3 of the cylinder body 1.

[0044] As a further improvement of this embodiment, an upper partition plate 10 is further provided inside the cylinder body 1 near the upper cover 2. The upper end of the oil pipe 4 passes upward through the upper partition plate 10 and extends out of the upper cover 2, and an upper sealing space 11 is formed between the upper cover 2 and the upper partition plate 10.

[0045] Similarly, a lower partition plate 12 is further provided inside the cylinder body 1 near the lower cover 3. The lower end of the oil pipe 4 passes upward through the lower partition plate 12 and extends out of the lower cover 3, and a lower sealing space 13 is formed between the lower cover 3 and the lower partition plate 12.

[0046] As a further improvement of this embodiment, leakage detection devices 14 are respectively arranged in the upper sealing space 11 and the lower sealing space 13. The leakage detection device 14 includes a resistance detection sensor 15 inserted into the upper sealing space 11 or the lower sealing space 13 for detecting the internal resistance of the sealing space.

[0047] Preferably, the resistance detection sensor 15 is a pair of conductive probes 16 arranged at intervals, and an insulating and sealing connection 17 is provided between the conductive probes 16 and the cylinder wall of the cylinder body 1.

[0048] As a further improvement of this embodiment, resistance auxiliary detection and verification powders 18 are respectively filled in the upper sealing space 11 and the lower sealing space 13. The resistance auxiliary detection and verification powder 18 includes a layer of water tank repair powder 19 and a layer of dry bentonite powder 20 arranged in layers; wherein, a layer of water tank repair powder 19 in the upper sealing space 11 is located below the layer of dry bentonite powder 20, and a layer of water tank repair powder 19 in the lower sealing space 13 is located above the layer of dry bentonite powder 20.

[0049] Preferably, a high-temperature resistant microporous membrane 21 for the leakage medium to pass through is provided between the layer of water tank repair powder 19 and the layer of dry bentonite powder 20.

[0050] In this embodiment, the resistance detection sensor 15 is connected to the leakage monitoring system of the steam heating cylinder of the ship fuel tank.

[0051] Preferably, one of the pair of conductive probes 16 of the resistance detection sensor 15 is inserted into the layer of water tank repair powder 19, and the other conductive probe 16 is inserted into the layer of dry bentonite powder 20.

[0052] In this embodiment, the relevant connections between the cylinder body 1, the cover plates (including the upper cover 2 and the lower cover 3), the partition plates (including the upper partition plate 10 and the lower partition plate 12), the oil pipe 4, and the support feet 9 are all welded.

[0053] Compared with the conventional steam coil heater, the steam heating cylinder has the following characteristics: the steam heating cylinder is small in volume, simple in structure and convenient for hoisting, while the steam coil heater occupies a large space and is not conducive to on-site operation; the number of installed steam heating cylinders can be increased or decreased according to the sea area where the ship operates, improving energy utilization efficiency; after the hydrostatic test of the steam heating cylinder, the shipyard only needs to ensure the weld performance at the interface, thus reducing the risk of leakage.

[0054] Example 2:

[0055] A method for using the steam heating cylinder of the ship fuel tank in Example 1 includes the following steps:

[0056] (1) Installation: Install the steam heating cylinder into the fuel tank, connect the steam inlet pipe 5 and the steam outlet pipe 6, and connect the resistance detection sensor 15 on the steam heating cylinder to the leakage monitoring system;

[0057] (2) Fuel injection: Inject fuel into the ship fuel tank to ensure that the fuel level is higher than the top of the steam heating cylinder;

[0058] (3) Fuel circulation heating: Connect the steam inlet pipe 5, steam enters the inside of the cylinder body 1, heats the oil pipe 4 and then the steam is discharged outwards from the steam outlet pipe 6, and the fuel in the oil pipe 4 is heated; the fuel flows in the oil pipe 4, and the temperature of the steam in the cylinder body 1 is transferred to the fuel by heat transfer to quickly increase the fuel temperature and reduce the fuel viscosity. The fuel circulates in the fuel tank through the oil pipe 4, with low-temperature fuel entering from below the oil pipe 4 and high-temperature fuel exiting from above the oil pipe 4, forming a circulating heating of the fuel in the tank;

[0059] (4) Steam leakage self-checking and alarm: When the steam inside the cylinder body 1 leaks into the upper sealed space 11 or the lower sealed space 13, the resistance between a pair of conductive probes 16 in the upper sealed space 11 or the lower sealed space will change; the leakage monitoring system will send an alarm message to remind the equipment maintenance personnel to handle it.

[0060] When steam leakage occurs, the steam first enters the internal part of the water tank repair powder 19 in one of the upper sealed space 11 or the lower sealed space 13, and then penetrates through the high-temperature resistant microporous membrane 21 into the dry bentonite powder 20, causing the dry bentonite powder to expand. The expansion of the dry bentonite powder exerts a squeezing effect on the water tank repair powder 19. The water tank repair powder mixed with water vapor enters the welding cracks between the upper partition 10 or the lower partition 12 and the oil pipe 4 or the cylinder body 1 under the action of the extrusion force, thus blocking the cracks and playing a role in stopping or delaying steam leakage.

[0061] In addition, when the fuel oil outside the cylinder body 1 leaks into the upper sealing space 11 or the lower sealing space 13, the resistance between a pair of conductive probes 16 in the upper sealing space 11 or the lower sealing space 13 will also change; this causes the leakage monitoring system to send out an alarm message to remind the equipment maintenance personnel to handle it. The handling method can be to replace the steam heating cylinder as a whole.

[0062] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A steam heating cylinder for a ship's fuel oil tank, characterized in that, It includes a cylinder body, an upper cover arranged at the upper port of the cylinder body, a lower cover arranged at the lower port of the cylinder body, and a number of oil pipes vertically arranged inside the cylinder body at intervals. The upper end of the oil pipe extends upward out of the upper cover, and the lower end of the oil pipe extends downward out of the lower cover. A steam inlet pipe and a steam outlet pipe are respectively arranged on the cylinder body. Among them, steam buffer baffles are also arranged at intervals at the position of the mouth of the steam inlet pipe inside the cylinder body, and a number of dispersion holes are opened on the steam buffer baffles; An upper partition board is also arranged at the position near the upper cover inside the cylinder body. The upper end of the oil pipe passes upward through the upper partition board and extends out of the upper cover, and an upper sealed space is formed between the upper cover and the upper partition board; A lower partition board is also arranged at the position near the lower cover inside the cylinder body. The lower end of the oil pipe passes downward through the lower partition board and extends out of the lower cover, and a lower sealed space is formed between the lower cover and the lower partition board; Resistance-assisted detection and verification powder is filled in the upper sealed space and the lower sealed space respectively. The resistance-assisted detection and verification powder includes a layer of water tank repair powder and a layer of dry bentonite powder arranged in layers; among them, a layer of water tank repair powder in the upper sealed space is located below the layer of dry bentonite powder, and a layer of water tank repair powder in the lower sealed space is located above the layer of dry bentonite powder; A high-temperature resistant microporous membrane for the leakage medium to pass through is arranged between the layer of water tank repair powder and the layer of dry bentonite powder.

2. The steam heating cylinder for a ship fuel oil tank according to claim 1, wherein Leakage detection devices are respectively arranged in the upper sealed space and the lower sealed space. The leakage detection device includes a resistance detection sensor inserted into the upper sealed space or the lower sealed space for detecting the internal resistance of the sealed space.

3. The steam heating cylinder for a ship fuel tank according to claim 2, characterized in that, The resistance detection sensor is a pair of conductive probes arranged at intervals, and an insulating and sealed connection is arranged between the conductive probes and the cylinder wall of the cylinder body.

4. A steam heating cylinder for a ship fuel tank according to claim 3, wherein, The resistance detection sensor is connected to the leakage monitoring system of the steam heating cylinder of the ship fuel tank; one of the pair of conductive probes of the resistance detection sensor is inserted into the layer of water tank repair powder, and the other conductive probe is inserted into the layer of dry bentonite powder.

5. A method for using the steam heating cylinder for a ship fuel tank according to claim 4, characterized in that, It includes the following steps: (1) Installation: Install the steam heating cylinder into the fuel tank, connect the steam inlet pipe and the steam outlet pipe well, and connect the resistance detection sensor on the steam heating cylinder to the leakage monitoring system; (2) Inject fuel: Inject fuel into the ship fuel tank to ensure that the fuel level is higher than the top of the steam heating cylinder; (3) Fuel circulation heating: Connect the steam inlet pipe, steam enters the inside of the cylinder body, heats the oil pipe and then the steam is discharged outward from the steam outlet pipe, and the fuel in the oil pipe is heated; the fuel flows in the oil pipe, and the temperature of the steam in the cylinder body is transferred to the fuel by heat transfer to quickly increase the fuel temperature and reduce the fuel viscosity. The fuel circulates in the fuel tank through the oil pipe. The low-temperature fuel enters from below the oil pipe, and the high-temperature fuel exits from above the oil pipe, forming a circulating heating of the fuel in the tank; (4)Steam leakage self-check and alarm: When steam inside the cylinder leaks into the upper sealed space or the lower sealed space, the resistance between a pair of conductive probes located in the upper sealed space or the lower sealed space will change; this causes the leakage monitoring system to send an alarm message to remind the equipment maintenance personnel to handle it. When steam leakage occurs, the steam first enters into the internal part of the water tank repair powder in one of the upper sealed space or the lower sealed space, and then penetrates through the high-temperature resistant microporous membrane into the dry bentonite powder in one layer, causing the dry bentonite powder to expand. The expansion of the dry bentonite powder exerts an extrusion effect on the water tank repair powder in one layer. The water tank repair powder mixed with water vapor enters the welding cracks between the upper partition or the lower partition and the oil pipe or the cylinder under the action of the extrusion force, thereby blocking the cracks and playing a role in stopping or delaying steam leakage.

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