Oil tanker explosion-proof system based on inert gas

Abstract

The invention discloses an oil tanker anti-explosion system based on inert gas, which is applied to the technical field of oil tanker anti-explosion, and aims at a washing tower in the anti-explosion system, a cross plate and an arc-shaped plate can form a flexible opening and closing partition plate structure through cooperation of a cleaning unit and a traction assembly, a closed soaking space is provided for a filler layer during cleaning, and the anti-explosion effect of the oil tanker is improved. Compared with traditional high-pressure washing, the scheme has the advantages that the cleaning effect and efficiency can be improved, meanwhile, consumption of water resources and chemical cleaning agents is reduced, in addition, through cooperation of the blockage clearing unit and the mud pumping pipe, when multiple layers of filler are soaked and cleaned, the blockage clearing unit and the mud pumping pipe are matched, and the blockage clearing efficiency is improved. And after immersion cleaning is finished, blocking objects on the bottom layer of the partition plate are transferred in time through the mud pumping pipe, then the cross plate and the arc-shaped plate are separated, supernate is released to the bottom wall of the washing tower, and the cleaning quality of the filler layer is further improved.

Description

Technical Field

[0001] This invention relates to the field of explosion protection technology for oil tankers, and particularly to an explosion protection system for oil tankers based on inert gas. Background Technology

[0002] An inert gas system reduces the oxygen concentration in oil tanks by injecting inert gas, making combustion and explosion impossible and thus fundamentally preventing explosions. The inert gas is obtained by treating the gas in the ship's boilers using a scrubbing tower; therefore, a scrubbing tower is an indispensable part of an oil tanker's explosion-proof system.

[0003] The prior art CN117771896A discloses a washing tower and its cleaning method, which uses a circulating pump to drive the first packing to circulate and clean in a first loop formed by a water tank and a washing layer. The water flow impact and mechanical impact force are used to quickly peel off the contaminants on the first packing, thereby improving the cleaning efficiency.

[0004] The prior art CN120286402A discloses a combined spray device and a washing tower, which uses a high-pressure flushing pipe to flush the packing material in the packing cage. At the same time, the high-pressure water pushes the packing cage to rotate, thereby generating centrifugal force to throw impurities out of the packing cage. The high-pressure water flushing and centrifugal force can increase the cleaning effect, thereby increasing the treatment effect of the washing tower.

[0005] In the prior art, when a scrubbing tower is used to purify waste gas, in order to avoid blockage and damage to the pressure drop of the packing, the packing is usually cleaned by flushing. However, in the actual flushing process, due to the tortuous internal pipes of the packing, the cleaning quality achieved by a single vertical flush is limited. Therefore, it is necessary to improve the cleaning operation in the scrubbing tower. Summary of the Invention

[0006] 1. Technical problems to be solved

[0007] The core of this invention lies in solving the problem of poor cleaning quality of the packing layer caused by single flushing in the prior art through a cleaning unit and a traction assembly. Simultaneously, the cooperation between the unblocking unit and the sludge suction pipe avoids interference between the upper and lower packing layers during immersion cleaning, ensuring the cleaning quality of both packing layers.

[0008] 2. Technical Solution

[0009] To solve the above problems, the present invention adopts the following technical solution.

[0010] An explosion protection system for oil tankers based on inert gas includes a scrubbing tower. The surface of the scrubbing tower is equipped with a water tank containing a built-in purification liquid, and a suction pump is arranged on one side of the water tank. Two sprayers are arranged inside the scrubbing tower, and the water tank and sprayers are connected by the suction pump to deliver the purification liquid. A packing layer is installed below each sprayer, and a cleaning unit for assisting the packing layer in immersion cleaning is arranged below each packing layer. The packing layer at the bottom is located between the two cleaning units.

[0011] The cleaning unit includes a cross plate fixed to the inner wall of the washing tower and located below the sprayer. A vertical pole is installed at the middle position of the bottom of the cross plate. The surface of the vertical pole is arranged with a first slide groove and a second slide groove arranged at intervals. A sliding block is slidably connected inside the first slide groove. A support frame is sleeved on the surface of the vertical pole and fixedly connected to the bottom of the sliding block at the top. A sliding frame is slidably connected inside the second slide groove, and a first seal and a second seal are fixedly connected to the surface of the sliding frame. The first seal is connected to an arc plate through a shaft.

[0012] The surface of the sliding block is connected to a traction cable, and a recessed groove is opened at the top of the upright, with a traction component arranged inside the recessed groove.

[0013] Furthermore, the length of chute number one is greater than the length of chute number two, and the tension cable is located inside chute number one.

[0014] Furthermore, the sum of the projected areas of the arc-shaped plate and the cross plate in the vertical direction is the same as the projected area of ​​the inner cross section of the washing tower. The bottom of the cross plate is provided with a fitting groove that matches the No. 1 seal and the No. 2 seal, and the No. 2 seal is fixedly connected to the top surface of the arc-shaped plate. The top of the arc-shaped plate is located above the quarter point of the top of the shaft.

[0015] Furthermore, the traction assembly includes a winding rod rotatably arranged in a recessed groove, with the surface of the winding rod wrapped around the tail end of the traction cable. The interior of the cross plate is hollow, and the top end of the winding rod extends into the interior of the cross plate. Two drive motors are mounted on the surface of the washing tower via a support bracket, and the output end of each drive motor is connected to a transmission rod extending into the interior of the cross plate. Both the end surfaces of the transmission rod and the winding rod are fitted with bevel gears, and the two bevel gears mesh with each other.

[0016] Furthermore, a blower box is arranged on one side of the scrubbing tower, and the blower box is connected to the air outlet at the top of the scrubbing tower through a pipe. A blower is installed inside the blower box, and an air supply pipe is connected to the outlet of the blower box. An air inlet is opened on the surface of the scrubbing tower, and a demister is installed inside the scrubbing tower above the top sprayer.

[0017] Furthermore, the surface of the scrubbing tower is equipped with observation windows located above the air inlet, and the center of each observation window is on the same plane as the installation position of each packing layer.

[0018] Furthermore, multiple drain pipes are installed through the interior of the arc-shaped plate at the top, and each drain pipe has a valve installed on its surface.

[0019] Optionally, the drain pipe has a rectangular cross-section and is equipped with a blockage-clearing unit. The blockage-clearing unit includes a filter cartridge that is rotatably installed on the inner wall of the drain pipe near the top. An anti-corrosion box is installed on the surface of the drain pipe, and a rotating motor is installed inside the anti-corrosion box. The output end of the rotating motor is connected to a rotating rod, and the tail end of the rotating rod is connected to the surface of the filter cartridge.

[0020] Furthermore, the center of the filter cartridge is located below the top surface of the drain pipe, and the cross-sectional length of the filter cartridge is the same as the cross-sectional length of the inner wall of the drain pipe. Two sludge suction pipes are installed on the inner wall of the washing tower, and the connection points of the two sludge suction pipes are both located on the top surface of the two packing layers. A sludge pump is arranged on one side of the washing tower, and the input end of the sludge pump is connected to the sludge suction pipe.

[0021] Furthermore, the inner wall of the recessed groove is equipped with symmetrically arranged sealing columns. A piston rod is slidably fitted inside the sealing column, and the top of the piston rod extends to the top of the cross plate and is connected to a moving plate. A limit rod is installed at the center of the cross plate, and the moving plate is slidably sleeved on the surface of the limit rod. A conveying pipe that penetrates the inside of the upright and extends to the outside of the washing tower is connected inside the sealing column.

[0022] 3. Beneficial effects

[0023] Compared with the prior art, the advantages of this invention are:

[0024] (1) This solution, through the cooperation of the cleaning unit and the traction component, can make the cross plate and the arc plate form a flexible opening and closing partition structure, providing a closed soaking space for the packing layer during cleaning, softening and removing the stubborn blockages in the packing layer. Compared with traditional high-pressure flushing, this solution can improve the cleaning effect and efficiency, while reducing the consumption of water resources and chemical cleaning agents. In addition, when cleaning is not required, the arc plate hangs down and will not affect the purification treatment of waste gas in the scrubbing tower.

[0025] (2) This solution effectively avoids secondary blockage of the lower layer by the pollutants falling off from the upper layer during the soaking and cleaning of the multi-layer packing through the cooperation of the unblocking unit and the mud suction pipe. After the immersion cleaning is completed, the blockage at the bottom of the baffle is transferred in time through the mud suction pipe. Then the cross plate and the arc plate are separated, and the supernatant is released to the bottom wall of the washing tower to further enhance the cleaning quality of the packing layer.

[0026] (3) This solution, through the cooperation of the moving plate, sealing column and piston rod, can improve the cleaning quality of the packing layer by disturbing the immersion liquid when the cleaning unit is in the immersion cleaning state. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the cleaning unit, filler layer, and sprayer of the present invention;

[0028] Figure 2 This is a schematic diagram of the overall structure of the present invention;

[0029] Figure 3 This is a schematic diagram of the structure of the scrubbing tower and air inlet of the present invention;

[0030] Figure 4 This is an internal sectional view of the washing tower of the present invention;

[0031] Figure 5 This is a schematic diagram of the cleaning unit and traction assembly of the present invention;

[0032] Figure 6 for Figure 5 Enlarged diagram of point A in the diagram;

[0033] Figure 7 This is a partial front view of the arc-shaped plate, the first seal, and the shaft of the present invention;

[0034] Figure 8 This is a top view of the arc-shaped plate, the cross plate, the first seal, and the second seal of the present invention;

[0035] Figure 9 This is a schematic diagram of the state in which the cleaning unit of the present invention forms a closed partition during the natural hanging stage;

[0036] Figure 10 This is a cross-sectional view of the filter cylinder and drain pipe of the present invention;

[0037] Figure 11 This is a structural diagram of the drain pipe and unclogging unit of the present invention;

[0038] Figure 12 This is a schematic diagram of the working state of the unblocking unit of the present invention;

[0039] Figure 13 This is a structural diagram of the upright rod, sealing ring, piston rod, moving plate, and limiting rod of the present invention.

[0040] Figure 14 This is a schematic diagram of the working state of the movable plate moving upwards according to the present invention.

[0041] Explanation of the labels in the diagram:

[0042] 1. Scrubber; 101. Air Inlet; 2. Blower Box; 3. Water Tank; 4. Suction Pump; 50. Drive Motor; 51. Transmission Rod; 52. Bevel Gear; 53. Winding Rod; 6. Demister; 7. Sprayer; 8. Packing Layer; 9. Cleaning Unit; 90. Upright; 901. No. 1 Slide; 902. Sliding Block; 903. Pull Cable; 904. No. 2 Slide; 905. Sliding Frame; 91. Cross Plate; 92. Arc Plate; 93. No. 1 Seal; 94. Lifting Frame; 95. No. 2 Seal; 10. Drain Pipe; 11. Unblocking Unit; 111. Rotary Motor; 112. Filter Cartridge; 12. Sludge Pumping Pipe; 13. Moving Plate; 14. Limiting Rod; 15. Piston Rod; 16. Sealing Column. Detailed Implementation

[0043] The technical solutions will now be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention.

[0044] Example 1:

[0045] Please see Figures 2-4 An explosion-proof system for oil tankers based on inert gas includes a scrubbing tower 1. A water tank 3 containing a built-in purification liquid is arranged on the surface of the scrubbing tower 1, and a suction pump 4 is arranged on one side of the water tank 3. Two sprayers 7 are arranged inside the scrubbing tower 1, and the water tank 3 and the sprayers 7 are transported with the purification liquid by the suction pump 4. A packing layer 8 is installed below each sprayer 7, and a cleaning unit 9 for assisting the packing layer 8 in immersion cleaning is arranged below each packing layer 8, and the packing layer 8 at the lower position is located between the two cleaning units 9.

[0046] Please see Figure 1 , Figure 5 , Figure 6 and Figure 8 The cleaning unit 9 includes a cross plate 91 fixed to the inner wall of the washing tower 1 and located below the sprayer 7. A vertical pole 90 is installed at the middle position of the bottom of the cross plate 91. The surface of the vertical pole 90 is arranged with a first slide groove 901 and a second slide groove 904 arranged at intervals. A sliding block 902 is slidably connected inside the first slide groove 901. A lifting frame 94 is sleeved on the surface of the vertical pole 90 and fixedly connected at the top to the bottom of the sliding block 902. A sliding frame 905 is slidably connected inside the second slide groove 904. A first seal 93 and a second seal 95 are fixedly connected to the surface of the sliding frame 905. The first seal 93 is connected to an arc plate 92 through a shaft.

[0047] Please see Figure 5 and Figure 6The surface of the sliding block 902 is connected to the pull cable 903. The top of the upright 90 is provided with a recessed groove. The traction assembly is arranged inside the recessed groove. The traction assembly includes a winding rod 53 rotatably arranged in the recessed groove. The surface of the winding rod 53 is wound around the tail end of the pull cable 903. The interior of the cross plate 91 is hollow. The top end of the winding rod 53 extends into the interior of the cross plate 91. The surface of the washing tower 1 is equipped with two drive motors 50 through the support bracket. The output end of each drive motor 50 is connected to a transmission rod 51 extending into the interior of the cross plate 91. The end surfaces of the transmission rod 51 and the winding rod 53 are both fitted with bevel gears 52, and the two bevel gears 52 mesh with each other.

[0048] Please see Figure 1 The length of the first chute 901 is greater than the length of the second chute 904, and the pull cable 903 is located inside the first chute 901. The sum of the projected areas of the arc plate 92 and the cross plate 91 in the vertical direction is the same as the projected area of ​​the inner section of the washing tower 1. The bottom of the cross plate 91 is provided with a fitting groove that matches the first seal 93 and the second seal 95, and the second seal 95 is fixedly connected to the top surface of the arc plate 92.

[0049] Specifically, in this embodiment, the diameter of the flue gas pipe used for conveying boiler exhaust gas is smaller than the diameter of the air inlet 101. Therefore, the exhaust gas is slowed down when it enters the scrubbing tower 1. In addition, branch pipes are installed on the surface of both sprayers 7 to receive cleaning liquid. When receiving cleaning liquid, the sprayer 7 no longer receives purification liquid from the water tank 3.

[0050] Please see Figures 2-4 A blower box 2 is arranged on one side of the washing tower 1, and the blower box 2 is connected to the air outlet at the top of the washing tower 1 through a pipe. A blower is installed inside the blower box 2, and an air supply pipe is connected to the outlet of the blower box 2. An air inlet 101 is opened on the surface of the washing tower 1, and a demister 6 is installed inside the washing tower 1 above the top sprayer 7.

[0051] Specifically, during the corresponding exhaust gas scrubbing operation, the exhaust gas generated by the boiler is guided into the air inlet 101 through the flue gas duct and then enters the interior of the scrubbing tower 1. The gas then rises and is sprayed downwards by the sprayer 7 with purification liquid, which counteracts the exhaust gas entering the scrubbing tower 1. This, combined with the packing layer 8, achieves a purification effect. After two rounds of spray purification, the gas passes through the demister 6 to remove water and is then discharged into the blower box 2 through the outlet of the scrubbing tower 1. Afterward, it enters the deck water seal and branch pipes through the gas supply pipes and is transferred to the oil tanks through the branch pipes to regulate the oxygen content in the oil tanks within a safe range, thereby achieving the corresponding explosion-proof effect for oil tankers.

[0052] During the purification process, the drive motor 50 rotates in the forward direction, driving the transmission rod 51 to rotate. Then, under the meshing transmission of the two bevel gears 52, the winding rod 53 rotates, releasing the surface tension cable 903. Under the weight of the sliding block 902 and the lifting frame 94, the lifting frame 94 slides naturally down the surface of the upright 90 until the bottom of the first chute 901. After the lifting frame 94 moves within the first chute 901 to below the second chute 904, the sliding frame 905, as well as the second seal 95, the first seal 93, and the arc plate 92 on the surface, lose their lifting function and move to the bottom of the second chute 904 under their own weight. At this time, the arc plate 92 naturally droops under the action of the shaft (e.g., Figure 7 As shown in the figure), and the surface overlaps the surface of the support frame 94, forming a V-shaped structure (as shown in the figure). Figure 9 As shown in the diagram, the arc plate 92 acts as a shield and decelerates the exhaust gas in the scrubbing tower 1, indirectly extending the contact time with the packing layer 8. After the drive motor 50 is turned off, a gap is created between the edge of the arc plate 92 and the inner wall of the scrubbing tower 1, allowing the gas entering from the air inlet 101 to move upward through the gap between the arc plate 92 and the inner wall of the scrubbing tower 1, as well as the gap between the arc plates 92, and receive the cleaning liquid sprayed by the sprayer 7 above, which works in conjunction with the packing layer 8 for purification.

[0053] As the purification operation continues, in order to prevent the packing layer 8 from becoming clogged, it needs to be cleaned. In the existing technology, high-pressure flushing is usually used. However, high-pressure flushing is a single flushing operation. When faced with the blockages on the inner wall of the tortuous channels inside the packing layer 8, the flushing operation not only requires a large flushing volume, but also has limited cleaning effect.

[0054] To address this issue, when cleaning the filler layer 8 is required, the drive motor 50 can be started to rotate in reverse. Under the meshing transmission of the two bevel gears 52, the winding rod 53 is driven to wind up, causing the pull cable 903 to wind up. This, in turn, causes the sliding block 902 and the connected lifting frame 94 to move upwards. When it moves to a position where it is flush with the bottom of the first slide groove 901 and the second slide groove 904, it can lift the sliding frame 905, causing the sliding frame 905, the arc plate 92, the first seal 93, and the second seal 95 to move upwards synchronously. During this process, as the lifting frame 94 moves upwards, the arc plate 92 gradually changes from a downward tilt to a horizontal state. When it moves to the bottom of the cross plate 91, the first seal 93 and the second seal 95 engage in the fitting groove, so that the cross plate 91 and the four arc plates 92 form a closed structure, forming a partition (such as...). Figure 8As shown), after turning off the drive motor 50, the cleaning fluid flowing out of the upper sprayer 7 can form a liquid layer above the partition, which can then immerse the packing layer 8, making the blockage in the packing layer 8 soft and fall off, and achieving a better cleaning effect inside the packing layer 8 (in order to enhance the immersion cleaning effect, a heater can be installed inside the arc plate 92 so that the temperature of the liquid during immersion is 60-70 degrees Celsius, reducing viscosity and accelerating the removal of blockage).

[0055] After cleaning, the drive motor 50 rotates in the forward direction, which can release the tension cable 903 accordingly, allowing the arc plate 92 and the cross plate 91 to separate, allowing the liquid layer formed during cleaning to fall off, and working with the sprayer 7 to continue single-round rinsing to enhance the cleaning effect.

[0056] Please see Figure 7 The top of the arc plate 92 is located above the quarter point of the top of the shaft.

[0057] Specifically, due to the design of the installation position of the arc plate 92 and the shaft, even if the arc plate 92 continues to be lifted upward after returning to a horizontal state, it cannot be lifted upward, thus maintaining the horizontal lifting of the arc plate 92.

[0058] Please see Figure 3 and Figure 4 The surface of the scrubbing tower 1 is equipped with an observation window located above the air inlet 101, and the middle position of each observation window is on the same plane as the installation position of each packing layer 8. Multiple drain pipes 10 are installed through the interior of the arc plate 92 at the upper position, and a valve is installed on the surface of each drain pipe 10.

[0059] Specifically, the purpose of the observation window is to check the immersion status of each packing layer 8, so as to facilitate the control of stopping the sprayer 7. In this embodiment, the sprayer 7 in the lower position is located below the packing layer 8 in the upper position. Therefore, when the upper packing layer 8 is immersed, the sprayer 7 in the lower position will also be immersed. At this time, because a one-way valve is installed inside the sprayer 7, it prevents liquid backflow. Therefore, when two packing layers 8 are immersed at the same time, the two cleaning units 9 can be formed into a partition structure first. Then, the sprayer 7 in the upper position and the valve are opened, so that the liquid accumulated on the surface of the upper partition is transferred to the surface of the lower partition (the total liquid output of the sprayer 7 is greater than the total liquid output of the drain pipe 10. In this way, the liquid layer on the surface of the upper partition can also achieve liquid level rise while draining, indirectly making the liquid level rise speed of the liquid layer on the surfaces of the two partitions the same).

[0060] Example 2:

[0061] Please see Figure 10 and Figure 11The drain pipe 10 has a rectangular cross-section and is equipped with a blockage removal unit 11. The blockage removal unit 11 includes a filter cylinder 112 that is rotatably installed on the inner wall of the drain pipe 10 near the top. A corrosion-resistant box is installed on the surface of the drain pipe 10. A rotating motor 111 is installed inside the corrosion-resistant box. The output end of the rotating motor 111 is connected to a rotating rod, and the tail end of the rotating rod is connected to the surface of the filter cylinder 112.

[0062] The center of the filter cylinder 112 is located below the top surface of the drain pipe 10, and the cross-sectional length of the filter cylinder 112 is the same as the cross-sectional length of the inner wall of the drain pipe 10.

[0063] Please see Figure 4 Two sludge suction pipes 12 are installed on the inner wall of the washing tower 1, and the connection positions of the two sludge suction pipes 12 are both located on the top surface of the two packing layers 8. A sludge pump (not shown in the figure, which is the prior art and will not be described in detail here) is arranged on one side of the washing tower 1, and the input end of the sludge pump is connected to the sludge suction pipe 12.

[0064] Specifically, based on Example 1, during the immersion process, a blockage removal unit 11 is installed on the partition formed by the upper cleaning unit 9. When the cleaning liquid is transferred to the partition formed by the lower cleaning unit 9, the transferred cleaning liquid is filtered to prevent the blockage material that falls off in the upper packing layer 8 during the immersion process from falling into the lower packing layer 8 and causing secondary pollution.

[0065] During the unclogging operation, the rotating motor 111 inside the corrosion-resistant box is activated, causing the filter cartridge 112 to rotate. This causes the exposed interception area to shift, replacing it with a new filter interception area. The blockage that was previously filled with blockage material on the surface of the interception area is scraped away and removed (e.g., Figure 12 As shown), it is piled up on the surface of the arc plate 92.

[0066] After the immersion cleaning is completed, the sludge pump is started. The sludge suction pipe 12 is used to suck and transfer the blockages deposited on the surface of the baffle formed by the cleaning unit 9. When the upper clear liquid is extracted, the sludge pump cooperates to perform a swallowing and spitting suction treatment, which can disturb the residual blockages on the surface of the arc plate 92. Then the suction continues until the suction is completed. Then the drive motor 50 is rotated in the opposite direction, the baffle opens, and the arc plate 92 returns to the V-shaped state.

[0067] Example 3:

[0068] Please see Figure 1 and Figure 13The inner wall of the recessed groove is equipped with symmetrically arranged sealing columns 16, and the inside of the sealing column 16 is connected to a conveying pipe that passes through the inside of the upright 90 and extends to the outside of the washing tower 1. The inside of the sealing column 16 is slidably fitted with a piston rod 15, and the top of the piston rod 15 extends to the top of the cross plate 91 and is connected to a moving plate 13. A limit rod 14 is installed at the center of the cross plate 91, and the moving plate 13 is slidably sleeved on the surface of the limit rod 14.

[0069] Specifically, based on Example 1, a sealing column 16, a piston rod 15, a limiting rod 14, and a moving plate 13 are added. After achieving immersion, air is supplied to the sealing column 16 or liquid is injected through an air pipe, causing the piston rod 15 to move upwards, which in turn moves the moving plate 13 upwards. Through continuous liquid injection and discharge operations, the moving plate 13 can be controlled to move up and down within the liquid accumulation layer (e.g., ...). Figure 14 As shown in the figure, it has a disturbance effect, which enhances the cleaning effect on the packing layer 8.

[0070] The cleaning unit 9, the unblocking unit 11, the sprayer 7, the packing layer 8, the transmission rod 51, the bevel gear 52, the delivery pipe, and the sealing column 16 are all treated with corrosion resistance.

[0071] The above description is merely a preferred embodiment of the present invention; it encompasses all the protection scope of the present invention. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solutions and improved concepts of the present invention, should be covered within the protection scope of the present invention.

Claims

1. An explosion protection system for oil tankers based on inert gas, comprising a scrubbing tower (1), wherein a water tank (3) containing a built-in purification liquid is arranged on the surface of the scrubbing tower (1), and a suction pump (4) is arranged on one side of the water tank (3), characterized in that: The washing tower (1) is equipped with two sprayers (7), and the water tank (3) and the sprayers (7) are transported by a suction pump (4). Each sprayer (7) is equipped with a packing layer (8) below it. Each packing layer (8) is equipped with a cleaning unit (9) below it to assist the packing layer (8) in immersion cleaning. The packing layer (8) below it is located in the middle of the two cleaning units (9). The cleaning unit (9) includes a cross plate (91) fixed to the inner wall of the washing tower (1) and located below the sprayer (7). A vertical pole (90) is installed at the middle position of the bottom of the cross plate (91). The surface of the vertical pole (90) is arranged with a first slide groove (901) and a second slide groove (904) arranged at intervals. A sliding block (902) is slidably connected inside the first slide groove (901). A lifting frame (94) is sleeved on the surface of the vertical pole (90) and fixedly connected at the top to the bottom of the sliding block (902). A sliding frame (905) is slidably connected inside the second slide groove (904). A first seal (93) and a second seal (95) are fixedly connected to the surface of the sliding frame (905) and arranged vertically. The first seal (93) is connected to an arc plate (92) through a shaft. The surface of the sliding block (902) is connected to a traction cable (903), and the top of the upright (90) is provided with a recessed groove, and a traction component is arranged inside the recessed groove.

2. The explosion-proof system for oil tankers based on inert gas according to claim 1, characterized in that: The length of the first chute (901) is greater than the length of the second chute (904), and the tension cable (903) is located inside the first chute (901).

3. The explosion-proof system for oil tankers based on inert gas according to claim 1, characterized in that: The sum of the vertical projection areas of the arc plate (92) and the cross plate (91) is the same as the projection area of ​​the inner cross section of the washing tower (1). The bottom of the cross plate (91) is provided with a fitting groove that matches the first seal (93) and the second seal (95). The second seal (95) is fixedly connected to the top surface of the arc plate (92). The top of the arc plate (92) is located above the quarter point of the top of the shaft.

4. The explosion-proof system for oil tankers based on inert gas according to claim 1, characterized in that: The traction assembly includes a take-up rod (53) rotatably arranged in a recessed groove, and the surface of the take-up rod (53) is wound around the tail end of the traction cable (903). The interior of the cross plate (91) is hollow. The top end of the take-up rod (53) extends into the interior of the cross plate (91). The surface of the washing tower (1) is equipped with two drive motors (50) via a support bracket. The output end of each drive motor (50) is connected to a transmission rod (51) extending into the interior of the cross plate (91). The end surfaces of the transmission rod (51) and the take-up rod (53) are both fitted with bevel gears (52), and the two bevel gears (52) mesh with each other.

5. The explosion-proof system for oil tankers based on inert gas according to claim 1, characterized in that: A blower box (2) is arranged on one side of the washing tower (1), and the blower box (2) is connected to the air outlet at the top of the washing tower (1) through a pipe. A blower is installed inside the blower box (2), and an air supply pipe is connected to the outlet of the blower box (2). An air inlet (101) is opened on the surface of the washing tower (1), and a demister (6) is installed inside the washing tower (1) above the top sprayer (7).

6. The explosion-proof system for oil tankers based on inert gas according to claim 1, characterized in that: The surface of the scrubbing tower (1) is equipped with an observation window located above the air inlet (101), and the middle position of each observation window is on the same plane as the installation position of each packing layer (8).

7. The explosion-proof system for oil tankers based on inert gas according to claim 1, characterized in that: Multiple drain pipes (10) are installed through the interior of the arc-shaped plate (92) at the upper position, and a valve is installed on the surface of each drain pipe (10).

8. The explosion-proof system for oil tankers based on inert gas according to claim 7, characterized in that: The drain pipe (10) has a rectangular cross-section and a blockage-clearing unit (11) is installed on the drain pipe (10). The blockage-clearing unit (11) includes a filter cylinder (112) that is rotatably installed on the inner wall of the drain pipe (10) near the top. An anti-corrosion box is installed on the surface of the drain pipe (10). A rotating motor (111) is installed inside the anti-corrosion box. The output end of the rotating motor (111) is connected to a rotating rod, and the tail end of the rotating rod is connected to the surface of the filter cylinder (112).

9. The explosion-proof system for oil tankers based on inert gas according to claim 8, characterized in that: The center of the filter cylinder (112) is located below the top surface of the drain pipe (10), and the cross-sectional length of the filter cylinder (112) is the same as the cross-sectional length of the inner wall of the drain pipe (10). Two sludge suction pipes (12) are installed on the inner wall of the washing tower (1), and the connection positions of the two sludge suction pipes (12) are both located on the top surface of the two packing layers (8). A sludge pump is arranged on one side of the washing tower (1), and the input end of the sludge pump is connected to the sludge suction pipe (12).

10. The explosion-proof system for oil tankers based on inert gas according to claim 1, characterized in that: The inner wall of the recessed groove is equipped with symmetrically arranged sealing columns (16), and the inside of the sealing column (16) is connected to a conveying pipe that passes through the inside of the upright (90) and extends to the outside of the washing tower (1). The inside of the sealing column (16) is slidably fitted with a piston rod (15), and the top of the piston rod (15) extends to the top of the cross plate (91) and is connected to a moving plate (13). A limit rod (14) is installed at the center of the cross plate (91), and the moving plate (13) is slidably sleeved on the surface of the limit rod (14).

Images