Marine exhaust gas treatment device

Abstract

The application discloses a marine exhaust gas treatment device, which comprises a tower body, an outer cylinder arranged in the tower body, and an inner cylinder arranged in the outer cylinder, wherein the top end of the inner cylinder is provided with a first spray head for spraying an alkaline solution, the bottom end of the inner cylinder is provided with a secondary exhaust gas treatment assembly, the top end of the outer cylinder is provided with a second spray head for spraying a reducing solution, the top end of the outer cylinder is provided with an outer top plate and an inner top plate, a liquid collecting cavity is formed in the inner wall of the outer cylinder, and a plurality of third spray heads are arranged in the outer cylinder wall in a ring shape and communicated with the liquid collecting cavity. The tower body is divided into three sections, the first section is the inner space of the inner cylinder, the second section is the space between the inner cylinder and the outer cylinder, and the third section is the space between the outer cylinder and the tower body. In this way, the exhaust gas flow path is increased, the residence time of the exhaust gas in the tower body is prolonged, and the reaction is ensured to be sufficient, so that the treatment effect of the exhaust gas is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of waste gas treatment, in particular to a marine waste gas treatment device. BACKGROUND

[0002] The pollutants discharged by ship exhaust gas mainly include sulfur oxides, nitrogen oxides, particulate matter, carbon dioxide and the like, and are one of the important sources of atmospheric pollution.

[0003] In order to reduce the pollution of ship exhaust gas to the atmosphere, it is necessary to treat the ship exhaust gas, and at present, a wet desulfurization and denitrification process is commonly used to treat the ship exhaust gas, but desulfurization and denitrification are carried out independently, and the equipment has a large volume, which requires a certain area on the ship, resulting in limited overall use.

[0004] At the same time, during the sailing process of the ship, the sailing speed is affected by many factors, and when the sailing speed changes, the exhaust emission will also change correspondingly, so that the content of sulfur oxides and nitrogen oxides in the exhaust gas will fluctuate during the entire sailing process, and the current desulfurization and denitrification tower cannot cope well, and the exhaust gas treatment is not thorough.

[0005] The exhaust gas treated by desulfurization and denitrification needs to be detected to be qualified before being discharged into the atmosphere, and the exhaust gas that does not meet the detection requirements needs to be introduced into the washing tower for secondary treatment. The exhaust gas that needs to be treated twice will collide with the primary exhaust gas flowing in the tower, interfering with the normal flow of the primary exhaust gas, thereby reducing the gas-liquid contact efficiency and being not conducive to the exhaust gas treatment effect.

[0006] In summary, the current exhaust gas treatment device still has defects and needs to be improved. SUMMARY

[0007] The present application aims to at least solve one of the problems in the prior art or related art.

[0008] Therefore, the purpose of the present application is to provide a marine exhaust gas treatment device, which comprises a tower body, an outer cylinder located in the tower body, and an inner cylinder located in the outer cylinder,

[0009] The top end of the inner cylinder is provided with a first spray head for spraying alkaline solution, the first spray head is connected with a first liquid inlet main pipe, the bottom end of the inner cylinder is provided with a secondary exhaust gas treatment assembly, the top end of the outer cylinder is provided with a second spray head for spraying reducing solution above, and a splash plate is arranged above the second spray head,

[0010] The second spray head is connected with a second liquid inlet main pipe, the first liquid inlet main pipe is communicated with a first liquid inlet branch pipe, and the second liquid inlet main pipe is communicated with a second liquid inlet branch pipe.

[0011] The first liquid discharge hopper is arranged directly below the inner cylinder, and the second liquid discharge hopper is arranged directly below the outer cylinder,

[0012] The outer top plate and the inner top plate are arranged in an arc shape, the outer cylinder wall is provided with an annular liquid collecting cavity, and a plurality of third nozzles are arranged in the outer cylinder wall in the annular liquid collecting cavity,

[0013] The outer top plate and the inner top plate are provided with a butt joint pipe for supplying liquid to the liquid collecting cavity, the butt joint pipe is connected to the first liquid inlet branch pipe and the second liquid inlet branch pipe through the lifting assembly, a communication pipe is arranged between the outer top plate and the inner top plate and connected to the butt joint pipe, and one end of the communication pipe, which is not connected to the butt joint pipe, penetrates the outer cylinder and extends into the liquid collecting cavity.

[0014] The butt joint pipe and the communication pipe are welded and fixed, and the communication pipe and the outer cylinder wall are welded and fixed, so that the sealing performance of the whole device is improved.

[0015] As a preferred technical solution,

[0016] The ship exhaust treatment device comprises a tower body, an inner cylinder and an outer cylinder, the tower body is provided with a first liquid discharge hopper and a second liquid discharge hopper, the first liquid discharge hopper is arranged in the second liquid discharge hopper, the first liquid discharge hopper is welded and fixed to the bottom of the inner cylinder, the second liquid discharge hopper is arranged in the outer cylinder, and the second liquid discharge hopper is welded and fixed to the bottom of the outer cylinder.

[0017] Through the above technical solution, the sizes of the first liquid discharge hopper and the second liquid discharge hopper are designed, so that the reaction products generated in the inner cylinder are discharged through the first liquid discharge hopper, the reaction products generated between the inner cylinder and the outer cylinder are discharged through the second liquid discharge hopper, and the reaction products generated between the outer cylinder and the tower body are discharged through the liquid discharge pipe, thereby the reaction products in the desulfurization and denitrification processes can be collected separately, and subsequent treatment is facilitated.

[0018] The ship exhaust treatment device comprises a tower body, an inner cylinder and an outer cylinder, the tower body is provided with a first liquid discharge hopper and a second liquid discharge hopper, the first liquid discharge hopper is arranged in the second liquid discharge hopper, the first liquid discharge hopper is welded and fixed to the bottom of the inner cylinder, the second liquid discharge hopper is arranged in the outer cylinder, and the second liquid discharge hopper is welded and fixed to the bottom of the outer cylinder.

[0019] Through the above technical solution, the secondary exhaust pipe is a flexible pipe, specifically a polytetrafluoroethylene hose, which has corrosion resistance and high temperature resistance, and can deform correspondingly with the lifting of the outer cylinder, thereby avoiding breakage.

[0020] The butt joint pipe is coaxial with the top end of the first liquid inlet branch pipe and the bottom end of the second liquid inlet branch pipe.

[0021] The position design of the butt joint pipe, the first liquid inlet branch pipe and the second liquid inlet branch pipe is such that when the butt joint pipe moves upward, the top end of the butt joint pipe is connected with the bottom end of the second liquid inlet branch pipe; and when the butt joint pipe moves downward, the bottom end of the butt joint pipe is connected with the top end of the first liquid inlet branch pipe.

[0022] The butt joint pipe is coaxial with the top end of the first liquid inlet branch pipe and the bottom end of the second liquid inlet branch pipe.

[0023] The position design of the butt joint pipe, the first liquid inlet branch pipe and the second liquid inlet branch pipe is such that when the butt joint pipe moves upward, the top end of the butt joint pipe is connected with the bottom end of the second liquid inlet branch pipe; and when the butt joint pipe moves downward, the bottom end of the butt joint pipe is connected with the top end of the first liquid inlet branch pipe.

[0024] The opposite ends of the butt joint pipe and the first liquid inlet branch pipe are flange-fixed with first gate valves, the opposite sides of the outer walls of the opposite ends of the butt joint pipe and the first liquid inlet branch pipe are welded with first racks, the opposite ends of the butt joint pipe and the second liquid inlet branch pipe are flange-fixed with second gate valves, the opposite sides of the outer walls of the opposite ends of the butt joint pipe and the second liquid inlet branch pipe are welded with second racks, and the valve rods of the first gate valves and the second gate valves are clamped and fixed with gears.

[0025] The gears on the first gate valves are tangent to the first racks, and the first racks can be engaged with the gears on the first gate valves during horizontal movement; similarly, the gears on the second gate valves are tangent to the second racks, and the second racks can be engaged with the gears on the second gate valves during horizontal movement.

[0026] The secondary exhaust gas treatment assembly comprises a gas collecting ring welded to the outer wall of the inner cylinder and a secondary gas inlet pipe welded in communication with the gas collecting ring, one end of the secondary gas inlet pipe penetrates the tower body and is welded to the tower body,

[0027] A plurality of gas outlet holes are arranged in a ring shape on the top surface of the gas collecting ring, two guide strips are arranged in parallel on the top surface of the gas collecting ring around the gas outlet holes, the top ends of the guide strips are flush with the top end of the inner cylinder, and the guide strips are welded to the outer wall of the inner cylinder,

[0028] The gas collecting ring is a hollow structure, a plurality of horizontal rods are welded to the outer circular wall of the gas collecting ring in a ring shape, and one end of each horizontal rod is welded to the inner wall of the tower body.

[0029] Through the above technical solution, the structural design of the gas collecting ring ensures that the secondary waste gas entering the gas collecting ring will be evenly sprayed upward from the gas outlet. The crossbar can support the inner cylinder and the first row of liquid hoppers through the gas collecting ring, thereby improving the stability of the overall structure.

[0030] As described above, a marine exhaust gas treatment device includes a baffle between the top ends of the guide strips, a guide plate welded to one end of the baffle, one end of the guide plate penetrating the inner top plate and welded to the inner top plate, and multiple holes and slots formed on the guide plate.

[0031] With the above technical solution, the baffle and the guide strip are attached but not fixed. When the outer cylinder moves vertically, the baffle will move vertically between the two guide strips through the guide plate, which is a reasonable structure.

[0032] As described above, in a marine exhaust gas treatment device, the lifting assembly includes a horizontal plate welded and fixed to the outer wall of the bottom end of the second liquid discharge hopper, and a set of electric push rods bolted to the bottom of the tower body. The output end of the electric push rods is welded and fixed to the horizontal plate.

[0033] The top of the second liquid hopper is welded with multiple support rods arranged in a ring, and the top of the support rods is welded and fixed to the bottom of the outer cylinder.

[0034] Through the above technical solution, the second row of liquid hoppers is supported and fixed to the outer cylinder by support rods, thereby improving the stability of the overall structure. Beneficial effects

[0035] (1) The present invention is provided with an inner cylinder and an outer cylinder, which divide the tower body into three sections: the first section is the internal space of the inner cylinder, the second section is the space between the inner cylinder and the outer cylinder, and the third section is the space between the outer cylinder and the tower body. This increases the flow path of the exhaust gas and improves the residence time of the exhaust gas inside the tower body, thereby ensuring sufficient reaction and improving the treatment effect of the exhaust gas. In this way, the exhaust gas discharged will not pollute the atmosphere.

[0036] (2) The present invention is equipped with a first nozzle and a second nozzle. The first nozzle, in conjunction with the inner cylinder, can perform desulfurization operations, and the second nozzle, in conjunction with the outer cylinder, can perform denitrification operations. Thus, desulfurization and denitrification can be combined into one unit, greatly reducing the size of the equipment and improving its overall applicability.

[0037] (3) The third nozzle is arranged, when the amount of sulfur oxides and nitrogen oxides in the ship exhaust gas fluctuates, for example, when the content of sulfur oxides increases, the third nozzle can spray alkaline solution in the space between the inner cylinder and the outer cylinder, cooperate with the first nozzle, can improve the absorption efficiency of sulfur oxides, when the amount of nitrogen oxides increases, the third nozzle can spray reducing solution, cooperate with the second nozzle, can improve the absorption efficiency of nitrogen oxides, so as to adapt to the fluctuation of waste gas, can improve the treatment effect of waste gas;

[0038] (4) The application is provided with a secondary waste gas treatment assembly, which is located in the space between the inner cylinder and the outer cylinder, so as to not interfere with the normal desulfurization and denitrification operation, and the secondary waste gas flows upward between the inner cylinder and the outer cylinder, which is staggered with the downward flowing waste gas, avoiding affecting the normal flow of waste gas, and the third nozzle can selectively spray alkaline solution or reducing solution, which can effectively perform secondary treatment on the waste gas. BRIEF DESCRIPTION OF DRAWINGS

[0039] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which

[0040] Figure 1 is an internal view of the present application;

[0041] Figure 2 is a perspective view of the first and second drain sumps of the present application;

[0042] Figure 3 is a perspective view of the inner cylinder and the outer cylinder of the present application;

[0043] Figure 4 is a perspective view of the inner cylinder and the outer cylinder of the present application;

[0044] Figure 5 is a sectional perspective view of the outer cylinder of the present application;

[0045] Figure 6 is a perspective view of the inner cylinder of the present application;

[0046] Figure 7 is a perspective view of the baffle and the flow guide plate of the present application;

[0047] Figure 8 is a perspective view of the first liquid inlet branch pipe, the second liquid inlet branch pipe and the butt joint pipe of the present application.

[0048] In the diagram: 1. Tower body; 2. Inner cylinder; 3. Outer cylinder; 4. First liquid inlet main pipe; 5. First nozzle; 6. Second liquid inlet main pipe; 7. Second nozzle; 8. First drain hopper; 9. Second drain hopper; 10. Outer top plate; 11. Inner top plate; 12. First liquid inlet branch pipe; 13. Second liquid inlet branch pipe; 14. Connecting pipe; 15. Connecting pipe; 16. Liquid collection chamber; 17. Third nozzle; 18. Air inlet main pipe; 19. Secondary air inlet pipe; 20. Air collection ring; 21. Air outlet; 22. Guide bar; 23. Baffle; 24. Guide plate; 25. Groove; 26. Secondary exhaust pipe; 27. First gate valve; 28. Second gate valve; 29. ​​First rack; 30. Second rack; 31. Support rod; 32. Splash plate; 33. Crossbar; 34. Cross plate; 35. Gear. Detailed Implementation

[0049] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0050] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0051] like Figures 1-5 As shown in the figure, an embodiment of the present invention discloses a marine exhaust gas treatment device, including a tower body 1, an outer cylinder 3 located inside the tower body 1, and an inner cylinder 2 located inside the outer cylinder 3. A first liquid inlet main pipe 4, a second liquid inlet main pipe 6, and an air inlet main pipe 18 are welded and fixed to the tower body 1. A secondary exhaust pipe 26 is also welded and bonded to the tower body 1. The air inlet main pipe 18 is welded and connected to the inner cylinder 2. One end of the secondary exhaust pipe 26 passes through an outer top plate 10 and is sealed and bonded to the outer top plate 10.

[0052] The inner cylinder 2 has a first nozzle 5 for spraying alkaline solution at its top, which is connected to the first liquid inlet manifold 4. A secondary exhaust gas treatment assembly is located at the bottom of the inner cylinder 2. The outer cylinder 3 has a second nozzle 7 for spraying reducing solution at its top, and a splash plate 32 is located directly above the second nozzle 7.

[0053] The second nozzle 7 is connected to the second inlet manifold 6. The first inlet manifold 4 is threadedly sealed to a first inlet branch pipe 12, and the second inlet manifold 6 is threadedly sealed to a second inlet branch pipe 13.

[0054] A first liquid discharge hopper 8 is located directly below the inner cylinder 2, and a second liquid discharge hopper 9 is located directly below the outer cylinder 3. A main exhaust pipe and a drain pipe are respectively located at the top and bottom of the tower body 1. The bottom ends of both the first liquid discharge hopper 8 and the second liquid discharge hopper 9 extend from the drain pipe. The inner diameter of the top of the first liquid discharge hopper 8 is the same as the inner diameter of the inner cylinder 2, and the inner diameter of the top of the second liquid discharge hopper 9 is the same as the inner diameter of the outer cylinder 3. The first liquid discharge hopper 8 is located inside the second liquid discharge hopper 9 and is welded and fixed to the bottom of the inner cylinder 2.

[0055] The outer cylinder 3 has an arc-shaped outer top plate 10 and an inner top plate 11 at its top. An annular liquid collection cavity 16 is formed on the inner wall of the outer cylinder 3. Multiple third nozzles 17 arranged in annular pattern are threadedly connected to the inner circle of the liquid collection cavity 16 on the wall of the outer cylinder 3.

[0056] The outer top plate 10 and the inner top plate 11 are provided with connecting pipes 14 for supplying liquid to the liquid collection chamber 16. The connecting pipes 14 are connected to the first liquid inlet branch pipe 12 and the second liquid inlet branch pipe 13 through the lifting assembly. A connecting pipe 15 is provided between the outer top plate 10 and the inner top plate 11 and is connected to the connecting pipes 14. The end of the connecting pipe 15 that is not connected to the connecting pipes 14 passes through the outer cylinder 3 and extends into the liquid collection chamber 16.

[0057] Specifically, this device also includes heat exchange equipment, electrostatic precipitator equipment, and electrolysis equipment. Before desulfurization and denitrification, the heat exchange equipment cools the waste gas to a suitable temperature, and the electrostatic precipitator removes particulate matter from the waste gas.

[0058] Pretreated seawater can be injected into the anode and cathode areas of the electrolysis equipment. When the seawater is electrolyzed, with the electrolysis power supply connected, an alkaline solution is generated in the cathode area, with NaOH as the main alkaline component, and an acidic solution is generated in the anode area, with HClO as the main oxidizing component. The cathode area is connected to the first inlet manifold 4, and the anode area is connected to the second inlet manifold 6.

[0059] During operation, exhaust gas is introduced into the inner cylinder 2 through the main intake pipe 18. The main intake pipe 18 is tangential to the inner cylinder 2, allowing the exhaust gas to spiral upward within the inner cylinder 2. Simultaneously, the first nozzle 5 sprays an alkaline solution, which reacts with the sulfur oxides in the exhaust gas to form sulfates. The resulting reactants are then collected and discharged through the first drain hopper 8.

[0060] The waste gas continuously flowing upward enters between the inner cylinder 2 and the outer cylinder 3 under the guidance of the inner top plate 11 and flows downward along the inner cylinder 2 and the outer cylinder 3, and when the waste gas flows to the bottom of the outer cylinder 3, the waste gas flows upward between the outer cylinder 3 and the tower body 1, at this time, the flow range of the waste gas is in the form of a circular ring, the second spray head 7 sprays the reducing solution upward, and the reducing solution splashes outward under the blockage of the splash plate 32, thereby forming a circular ring-shaped coverage range which is matched with the flow range of the waste gas, so that the gas-liquid contact effect can be improved, at this time, the reducing solution can react with the nitrogen oxides in the waste gas to generate nitrate, and the generated reaction product is finally discharged along the liquid discharge pipe,

[0061] The finally treated waste gas is discharged through the exhaust manifold, and the waste gas can be directly discharged into the atmosphere after passing through the detection and being qualified, if not qualified, the waste gas will be introduced into the secondary waste gas treatment assembly again, and after being treated, the waste gas is discharged through the secondary exhaust pipe 26;

[0062] The device is provided with a sulfur oxide and nitrogen oxide detection sensor at the waste gas inlet end, which can detect the content of sulfur oxide and nitrogen oxide in the waste gas, and when the content of sulfur oxide and nitrogen oxide in the waste gas fluctuates, it can be detected in real time, for example, when the content of sulfur oxide is too high, the butt joint pipe 14 vertically moves downward under the action of the lifting assembly and is connected and communicated with the first liquid inlet branch pipe 12, at this time, the alkaline solution in the first liquid inlet manifold 4 is divided into the first liquid inlet branch pipe 12 and enters the butt joint pipe 14, the alkaline solution enters the liquid collecting cavity 16 through the communication pipe 15, and finally the alkaline solution is sprayed from the third spray head 17, when the waste gas flows downward along the inner cylinder 2 and the outer cylinder 3, the third spray head 17 can perform secondary desulfurization on the waste gas, and the product of the desulfurization reaction is discharged through the second liquid discharge hopper 9,

[0063] For example, when the content of nitrogen oxides is too high, the butt joint pipe 14 vertically moves upward under the action of the lifting assembly and is connected and communicated with the second liquid inlet branch pipe 13, the reducing solution in the second liquid inlet manifold 6 is divided into the second liquid inlet branch pipe 13 and enters the butt joint pipe 14, the reducing solution enters the liquid collecting cavity 16 through the communication pipe 15, and finally the reducing solution is sprayed from the third spray head 17, when the waste gas flows downward along the inner cylinder 2 and the outer cylinder 3, the third spray head 17 can perform preliminary denitration on the waste gas, and the product of the denitration reaction is discharged through the second liquid discharge hopper 9,

[0064] In the above manner, the waste gas treatment can be ensured to be sufficient, and the waste gas purification effect can be improved,

[0065] The first liquid discharge hopper 8, the second liquid discharge hopper 9 and the liquid discharge pipe are independent of each other, so that the reaction products of desulfurization and denitration, i.e. sulfate and nitrate, can be collected separately, and selective treatment can be facilitated, for example, the sulfate is discharged into the sea, and the nitrate is recycled.

[0066] In one specific embodiment of the present application, the adapter pipe 14 is coaxial with the top end of the first liquid inlet branch pipe 12 and the bottom end of the second liquid inlet branch pipe 13.

[0067] The opposite end of the adapter pipe 14 and the first liquid inlet branch pipe 12 is flange-fixed with a first gate valve 27, and the outer wall of the opposite side of the opposite end of the adapter pipe 14 and the first liquid inlet branch pipe 12 is welded with a first rack 29. The opposite end of the adapter pipe 14 and the second liquid inlet branch pipe 13 is flange-fixed with a second gate valve 28, and the outer wall of the opposite side of the opposite end of the adapter pipe 14 and the second liquid inlet branch pipe 13 is welded with a second rack 30. The top end of the valve stem of the first gate valve 27 and the second gate valve 28 is snap-locked with a gear 35.

[0068] Specifically, as shown in Figure 1 and Figure 8 When the adapter pipe 14 moves vertically downward, the adapter pipe 14 and the first liquid inlet branch pipe 12 approach each other until the end faces of the first gate valves 27 on the two pipes abut tightly. At this time, the first racks 29 on the adapter pipe 14 and the first liquid inlet branch pipe 12 are engaged with the gear 35 and push the gear 35 to rotate, and the gear 35 drives the valve stem to rotate to open the valve plate. At this time, the first gate valves 27 on the adapter pipe 14 and the first liquid inlet branch pipe 12 are connected, and the alkaline solution in the first liquid inlet branch pipe 12 enters the adapter pipe 14 and finally enters the communication pipe 15,

[0069] When the adapter pipe 14 and the first liquid inlet branch pipe 12 move away from each other, the first rack 29 engages with the gear 35 and drives the gear 35 to reverse, and the gear 35 drives the valve stem to reverse to close the first gate valve 27. In this process, a small amount of alkaline solution will flow out, and the alkaline solution will fall along the inner cylinder 2 and be discharged through the first liquid discharge chute 8, which will not affect the desulfurization operation,

[0070] When the adapter pipe 14 moves vertically upward, the adapter pipe 14 and the second liquid inlet branch pipe 13 approach each other until the end faces of the second gate valves 28 on the two pipes abut tightly. At this time, the second racks 30 on the adapter pipe 14 and the second liquid inlet branch pipe 13 are engaged with the gear 35 and push the gear 35 to rotate, and the gear 35 drives the valve stem to rotate to open the valve plate. The reducing solution in the second liquid inlet branch pipe 13 enters the adapter pipe 14 and finally enters the communication pipe 15,

[0071] When the adapter pipe 14 and the second liquid inlet branch pipe 13 move away from each other, the second rack 30 engages with the gear 35 and drives the gear 35 to reverse, and the gear 35 drives the valve stem to reverse to close the second gate valve 28. In this process, a small amount of reducing solution will flow out, and the reducing solution will flow down along the outer top plate 10 and finally be discharged through the liquid discharge pipe, which will not affect the denitration operation.

[0072] In one specific embodiment of the present application, the secondary waste gas treatment assembly comprises a gas collecting ring 20 welded to the outer wall of the inner cylinder 2, and a secondary gas inlet pipe 19 in communication with the gas collecting ring 20, one end of the secondary gas inlet pipe 19 penetrating through the tower body 1 and being welded to the tower body 1,

[0073] A plurality of gas outlet holes 21 are arranged in a ring shape on the top surface of the gas collecting ring 20, and two parallel flow guide strips 22 are arranged on the top surface of the gas collecting ring 20 around the gas outlet holes 21, the top ends of the flow guide strips 22 are flush with the top end of the inner cylinder 2, and the flow guide strips 22 are welded to the outer wall of the inner cylinder 2.

[0074] The gas collecting ring 20 is a hollow structure, a plurality of horizontal rods 33 are welded to the outer circular wall of the gas collecting ring 20,

[0075] A baffle plate 23 is arranged between the top ends of the two flow guide strips 22, the baffle plate 23 is welded at one end to a flow guide plate 24, one end of the flow guide plate 24 penetrates through the inner top plate 11 and is welded to the inner top plate 11, and a plurality of hole grooves 25 are arranged on the flow guide plate 24.

[0076] Specifically, as shown in Figure 1 、 Figure 4 、 Figure 6 and Figure 7 When the waste gas needs to be treated twice because it does not meet the detection requirements, the waste gas enters the gas collecting ring 20 through the secondary gas inlet pipe 19, a vertical flow channel is formed between the two flow guide strips 22, and the waste gas is sprayed upward through the plurality of gas outlet holes 21 and then flows upward along the flow channel, in the process of flowing, the third spray head 17 can spray alkaline solution or reducing solution to realize the secondary treatment of the waste gas, the treated waste gas continues to flow upward and is finally blocked by the baffle plate 23, the waste gas is forced to enter the hole grooves 25 and flow to the gap between the outer top plate 10 and the inner top plate 11, and finally the waste gas is discharged through the secondary exhaust pipe 26, in the process, a small amount of secondary waste gas is mixed into the desulfurized waste gas, because the content of the secondary waste gas is small, it does not interfere with the normal flow of the desulfurized waste gas,

[0077] After the waste gas in the inner cylinder 2 is desulfurized, it flows upward and is introduced between the inner cylinder 2 and the outer cylinder 3, due to the blocking of the baffle plate 23 and the flow guide plate 24, the waste gas flows downward from the space on both sides of the baffle plate 23 and the flow guide plate 24, this design makes the downward flowing waste gas and the upward flowing secondary waste gas staggered, avoiding collision and affecting the flow of the waste gas.

[0078] In one specific embodiment of the present application, the outer top plate 10 and the inner top plate 11 are not in contact, the outer top plate 10 and the inner top plate 11 are welded to the top end of the outer cylinder 3, and a first liquid inlet main pipe 4 penetrates through the center of the top end of the outer top plate 10 and the inner top plate 11,

[0079] The lifting assembly comprises a horizontal plate 34 welded to the outer wall of the bottom end of the second liquid outlet 9, and a set of electric push rods fixed to the bottom of the tower body 1, the output ends of the electric push rods being welded to the horizontal plate 34,

[0080] The top end of the second liquid outlet 9 is welded with a plurality of support rods 31 distributed in a ring shape, the top ends of the support rods 31 being welded to the bottom end of the outer cylinder 3.

[0081] Specifically, as shown in Figure 1 and Figure 2 The outer top plate 10 and the inner top plate 11 can move vertically along the first liquid inlet pipe 4, that is, the outer cylinder 3 can move vertically along the first liquid inlet pipe 4. When the electric push rods are powered on and operated, the electric push rods drive the second liquid outlet 9 to move vertically through the horizontal plate 34, and the second liquid outlet 9 drives the outer cylinder 3 to move vertically through the support rods 31, so as to realize the vertical movement of the connecting pipe 14.

[0082] The support rods 31 are selected to have a proper length, so that there is a proper gap between the top end of the second liquid outlet 9 and the bottom end of the outer cylinder 3. In this way, the exhaust gas between the inner cylinder 2 and the outer cylinder 3 can all enter between the outer cylinder 3 and the tower body 1, avoiding the exhaust gas being discharged through the second liquid outlet 9.

[0083] In the description of the present specification, the terms of “connection”, “installation”, “fixation” and the like should be understood in a broad sense, for example, “connection” can be fixed connection, detachable connection, or integral connection; can be direct connection, or indirect connection through an intermediate medium. For those skilled in the art, the above terms in the present application can be understood according to the specific meaning in the specific context.

[0084] In the description of the present specification, the terms of “one embodiment”, “some embodiments”, “a specific embodiment” and the like mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0085] The above is only the preferred embodiment of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A marine exhaust gas treatment device, comprising a tower body (1), an outer cylinder (3) located in the tower body (1), and an inner cylinder (2) located in the outer cylinder (3), characterized in that The top end of the inner cylinder (2) is provided with a first spray head (5) for spraying an alkaline solution, the first spray head (5) is connected with a first liquid inlet main pipe (4), the bottom end of the inner cylinder (2) is provided with a secondary exhaust gas treatment assembly, the top end of the outer cylinder (3) is provided with a second spray head (7) above for spraying a reducing solution, and a splash plate (32) is arranged directly above the second spray head (7), The second spray head (7) is connected with a second liquid inlet main pipe (6), the first liquid inlet main pipe (4) is communicated with a first liquid inlet branch pipe (12), and the second liquid inlet main pipe (6) is communicated with a second liquid inlet branch pipe (13), The top end of the outer cylinder (3) is provided with an outer top plate (10) and an inner top plate (11), a liquid collecting cavity (16) is formed in the inner wall of the outer cylinder (3), and a plurality of third spray heads (17) are arranged in the outer cylinder (3) wall in a ring shape, The outer top plate (10) and the inner top plate (11) are penetrated by a butt joint pipe (14) for supplying liquid to the liquid collecting cavity (16), and the butt joint pipe (14) is connected with the first liquid inlet branch pipe (12) and the second liquid inlet branch pipe (13) through a lifting assembly, The top end and the bottom end of the tower body (1) are respectively provided with an exhaust main pipe and a liquid discharge pipe, a first liquid discharge hopper (8) is arranged directly below the inner cylinder (2), and a second liquid discharge hopper (9) is arranged directly below the outer cylinder (3), The bottom end of the first liquid discharge hopper (8) and the second liquid discharge hopper (9) extends out of the liquid discharge pipe, the inner diameter of the top end of the first liquid discharge hopper (8) is consistent with the inner diameter of the inner cylinder (2), the inner diameter of the top end of the second liquid discharge hopper (9) is consistent with the inner diameter of the outer cylinder (3), the first liquid discharge hopper (8) is located on the inner side of the second liquid discharge hopper (9), and the first liquid discharge hopper (8) is welded and fixed with the bottom of the inner cylinder (2), The lifting assembly comprises a horizontal plate (34) welded and fixed with the outer wall of the bottom end of the second liquid discharge hopper (9), and a group of electric push rods bolted to the bottom of the tower body (1), and the output end of the electric push rod is welded and fixed with the horizontal plate (34), A plurality of support rods (31) are welded to the top end of the second liquid discharge hopper (9) in a ring shape, and the top end of the support rod (31) is welded and fixed with the bottom end of the outer cylinder (3).

2. An exhaust gas treatment device for a marine vessel according to claim 1, characterized in that: The first liquid inlet main pipe (4), the second liquid inlet main pipe (6) and the gas inlet main pipe (18) are penetrated through the tower body (1) and welded and fixed with the tower body (1), the secondary exhaust pipe (26) is also penetrated through the tower body (1) and sealed and bonded with the tower body (1), the gas inlet main pipe (18) is welded and communicated with the inner cylinder (2), and one end of the secondary exhaust pipe (26) penetrates through the outer top plate (10) and is sealed and bonded with the outer top plate (10).

3. An exhaust treatment device for marine vessels as claimed in claim 1, characterized in that: The outer top plate (10) and the inner top plate (11) are not in contact, and a communication pipe (15) in communication with the butt joint pipe (14) is arranged between the outer top plate (10) and the inner top plate (11), one end of the communication pipe (15) not in communication with the butt joint pipe (14) penetrates the outer cylinder (3) and extends into the liquid collecting cavity (16), The outer top plate (10) and the inner top plate (11) are both welded and fixed with the top end of the outer cylinder (3), and a first liquid inlet main pipe (4) penetrates the center of the top end of the outer top plate (10) and the inner top plate (11).

4. An exhaust treatment device for marine vessels as claimed in claim 1, characterized in that: The butt joint pipe (14) is coaxial with the top end of the first liquid inlet branch pipe (12) and the bottom end of the second liquid inlet branch pipe (13).

5. An exhaust treatment device for marine vessels as claimed in claim 1, wherein: The opposite end of the butt joint pipe (14) and the first liquid inlet branch pipe (12) is flange-fixed with a first gate valve (27), and the outer wall of the opposite side of the opposite end of the butt joint pipe (14) and the first liquid inlet branch pipe (12) is welded and fixed with a first rack (29), the opposite end of the butt joint pipe (14) and the second liquid inlet branch pipe (13) is flange-fixed with a second gate valve (28), and the outer wall of the opposite side of the opposite end of the butt joint pipe (14) and the second liquid inlet branch pipe (13) is welded and fixed with a second rack (30), and the valve rod top end of the first gate valve (27) and the second gate valve (28) is snap pinned with a gear (35).

6. An exhaust treatment device for marine vessels as claimed in claim 1, characterized in that: The secondary exhaust gas treatment assembly comprises a gas collecting ring (20) welded and fixed on the outer wall of the inner cylinder (2), and a secondary gas inlet pipe (19) welded in communication with the gas collecting ring (20), one end of the secondary gas inlet pipe (19) penetrates the tower body (1) and is welded and fixed with the tower body (1), A plurality of gas outlet holes (21) are arranged in a ring shape on the top surface of the gas collecting ring (20), two guide strips (22) are arranged in parallel on the top surface of the gas collecting ring (20) around the gas outlet holes (21), the top end of the guide strip (22) is flush with the top end of the inner cylinder (2), and the guide strip (22) is welded and fixed with the outer wall of the inner cylinder (2).

7. An exhaust gas treatment device for a marine vessel according to claim 6, characterised in that: The gas collecting ring (20) is a hollow structure, a plurality of horizontal rods (33) are welded and fixed in a ring shape on the outer circular wall of the gas collecting ring (20), and one end of the horizontal rod (33) is welded and fixed with the inner wall of the tower body (1).

8. An exhaust treatment device for marine vessels as claimed in claim 6, characterised in that: A baffle (23) is arranged between the top ends of the two guide strips (22), one end of the baffle (23) is welded and fixed with a flow guide plate (24), one end of the flow guide plate (24) penetrates the inner top plate (11) and is welded and fixed with the inner top plate (11), and a plurality of hole grooves (25) are arranged on the flow guide plate (24).

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