High-efficiency open-type desulfurization washing tower on ship

Abstract

This application relates to the field of marine scrubbing tower technology, and in particular to a high-efficiency open-type desulfurization scrubbing tower on board. The open-type desulfurization scrubbing tower specifically includes a tower and a flue gas inlet pipe. The tower is divided into a scrubbing water collection section, a spray scrubbing section, and a flue gas outlet section. The spray scrubbing section includes a lower packing layer, an upper packing layer, and a demister. A lower spray pipe is installed above the lower packing layer, and an upper spray pipe assembly is installed above the upper packing layer. The upper spray pipe assembly includes a first spray pipe and a second spray pipe spaced apart from bottom to top. Each spray pipe includes a main pipe and multiple branch pipes, with nozzles installed on the branch pipes. The main pipes of the first and second spray pipes are aligned along the height direction, and the branch pipes and nozzles are staggered. The flue gas inlet pipe is divided into a straight section and a curved section. The straight section includes a pre-spray pipe, and the curved section is connected to the exhaust gas inlet. This open-type desulfurization scrubbing tower design can improve the desulfurization efficiency and effect for medium and low concentration exhaust gases.

Description

Technical Field

[0001] This utility model relates to the field of marine scrubbing tower technology, and in particular to a high-efficiency open-type desulfurization scrubbing tower for ships. Background Technology

[0002] Exhaust gases from marine diesel engines are a major source of air pollution, and the International Maritime Organization (IMO) mandates that ships reduce their emissions of sulfur oxides (SOx). Open-loop scrubbers have become a mainstream solution due to their simplicity and low operating costs.

[0003] For example, Chinese patent CN109499296A, published on January 11, 2019, discloses a desulfurization scrubbing tower for marine diesel engine exhaust. Specifically, it includes a Venturi unit and a positioning reaction unit. The Venturi unit includes a reducing pipe for flue gas inlet and a bend connecting the reaction tower and the Venturi pipe. The positioning reaction unit includes a reaction tower, a support plate, a first spray pipe, and a second spray pipe. The reaction tower, reducing pipe, and bend form a U-shaped structure. A mixing spray pipe is located at the exhaust gas inlet of the reducing pipe. Packing material is located above the support plate. The first spray pipe is located above the packing material, and the second spray pipe is located below the support plate. An exhaust outlet is located at the top of the reaction tower. In this design, the second spray pipe located below the packing material performs preliminary washing and cooling of the sulfur-containing exhaust gas, enhancing gas-liquid contact. The first spray pipe located above the packing material sprays alkaline droplets onto the packing layer, forming a liquid film layer that reacts fully with the exhaust gas, improving desulfurization efficiency.

[0004] However, this scheme still has some shortcomings. For example, the second spray pipe can only react with high-concentration exhaust gas through the contact of the sprayed suspended droplets to absorb some of the SOx-containing gas and prevent clogging of the packing. However, for medium- and low-concentration or unevenly distributed SOx-containing exhaust gas, the contact time between the droplets sprayed from the second spray pipe and the exhaust gas is short and the contact area is limited, resulting in very low pretreatment efficiency. In high-speed airflow situations, even if the exhaust gas passes through the packing layer and reacts again with the droplet particles sprayed from the first spray pipe, there will still be some sulfur oxide residue, making the exhaust gas fail to meet the IMO emission requirements. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a high-efficiency shipboard open desulfurization scrubbing tower. The setting of this open desulfurization scrubbing tower can improve the desulfurization treatment efficiency and effect of medium and low concentration waste gas.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: This embodiment provides a high-efficiency onboard open-type desulfurization scrubbing tower, comprising: a tower cylinder, which is divided from bottom to top into a scrubbing water collection section, a spray scrubbing section, and a flue gas outlet section. The spray scrubbing section includes a lower packing layer, an upper packing layer, and a demister distributed at intervals from bottom to top. A lower spray pipe is disposed above the lower packing layer, and an upper spray pipe assembly is disposed above the upper packing layer. The upper spray pipe assembly includes a first spray pipe and a second spray pipe distributed at intervals from bottom to top. The spray pipe includes a straight tubular main pipe and spray pipes distributed on the main pipe. Multiple branch pipes on both sides of the main pipe are vertically connected to the main pipe. Multiple nozzles are provided on the branch pipes. The main pipes of the first and second spray pipes are aligned along the height direction, and the branch pipes and nozzles are staggered. The flue gas inlet pipe is divided into a straight pipe section and a curved pipe section from top to bottom. The straight pipe section includes a pre-spray pipe. The lower part of the spray washing section is provided with an exhaust gas inlet. The curved pipe section is connected to the exhaust gas inlet. A wedge-shaped support is welded to the bottom of the flue gas inlet curved pipe section. The wedge support is rigidly connected to the hull.

[0007] To optimize the above solution, the following technical measures were also adopted: As a preferred embodiment, the main pipes of the lower spray pipe, the first spray pipe, and the second spray pipe are aligned along the height direction.

[0008] As one preferred embodiment, multiple branch pipes on the same side of the first and second spray pipes are arranged alternately along the direction of the main pipe extension, and the length variation of the multiple branch pipes on the same side is fitted to the inner diameter of the tower.

[0009] As a preferred embodiment, a demisting spray pipe is provided above the demister. The demisting spray pipe has the same structure as the first spray pipe and the second spray pipe, and the main pipes of the three are aligned along the height direction. The demisting spray pipe has an online flushing inlet end extending outside the tower. The first spray pipe, the second spray pipe, and the lower spray pipe all have spray seawater inlet ends extending outside the tower. The online flushing inlet ends and each spray seawater inlet end are arranged at linear intervals along the height direction.

[0010] As one of the preferred methods, the tower is provided with multiple horizontal rib seats, each corresponding to a multiple main pipe. One end of each main pipe is provided with a horizontal main pipe support, which is supported on the corresponding rib seat and fixed with bolts. The tower is provided with multiple vertical connecting pieces, each corresponding to a multiple branch pipe. One end of each branch pipe is provided with a vertical branch pipe ear plate, which is attached to the corresponding connecting piece along the side and fixed with bolts.

[0011] As one of the preferred embodiments, the wedge-shaped support includes an L-shaped base, two wedge-shaped ribs welded to the L-shaped base, and a welded positioning plate connected to the inclined surface of the two wedge-shaped ribs. The welded positioning plate is welded to the bent pipe section, and the L-shaped base is fixedly connected to the hull.

[0012] As one of the preferred embodiments, the washing water collection section includes a bottom drain outlet and a smooth slope section that transitions from the spray washing section to the bottom drain outlet. Multiple tower bottom reinforcing ribs are evenly spaced along the circumferential direction on the smooth slope section, and the tower bottom reinforcing ribs extend from the spray washing section to the bottom drain outlet.

[0013] As a preferred embodiment, the flue gas outlet section adopts a tapered transition section and has a flange opening at the top as a purified gas outlet.

[0014] As one preferred embodiment, the packing layer includes a packing support plate, a packing clamping plate, and packing material, wherein the packing material is fixedly installed between the packing support plate and the packing clamping plate.

[0015] As one of the preferred methods, multiple sets of manholes are arranged at intervals along the height direction on the tower, and each set of manholes corresponds to at least one of the packing layer, spray pipe and demister, and the manholes are elliptical holes.

[0016] Because of the adoption of the above-described solution, one or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages: Firstly, this embodiment employs a "layered and graded" approach to treat the high-temperature sulfur-containing exhaust gas emitted from ship engines. Specifically, after the high-temperature sulfur-containing exhaust gas enters the flue gas inlet pipe, seawater from the pre-spray pipe initially cools and humidifies the exhaust gas, removing most of the large particulate pollutants and reducing the sulfur concentration. The exhaust gas then enters the tower from the exhaust gas inlet, passing sequentially through the lower packing layer and the lower spray pipe for primary treatment. A large amount of alkaline seawater sprayed downwards from the lower spray pipe serves as the main scrubbing liquid, forming a liquid film layer on the lower packing layer that fully counter-currently contacts the rising exhaust gas. Through physical scrubbing and chemical neutralization reactions, most of the sulfur oxides in the exhaust gas are removed. The gas undergoes secondary treatment via an upper packing layer and an upper spray pipe assembly. The secondary treatment uses a combination of the first and second spray pipes to create a more thorough and uniform spray pattern on the cross-section of the tower than the first stage, increasing the probability of low-concentration sulfur oxides coming into contact with the spray droplets. The washed gas continues to rise and enters the demister area for demisting before being discharged from the flue gas outlet. Through the above-mentioned "layered and graded" treatment method for sulfur-containing waste gas, the efficiency and effect of waste gas desulfurization can be significantly improved, making the scrubbing tower suitable for treating both high-sulfur and low-sulfur waste gas, thus expanding the application range of the scrubbing tower, and ensuring that the purified gas fully meets IMO emission requirements.

[0017] Furthermore, the first and second spray pipes can adopt essentially the same spray pipe structure. Only the design positions of the branch pipes and nozzles need to be adjusted accordingly to obtain the above-mentioned pipe fittings. The manufacturing process can be completely unified into one process. The main pipes of the first and second spray pipes are aligned along the height direction, and the branch pipes and nozzles are staggered. This layout can facilitate the assembly, welding and positioning of the spray pipes and the tower without significantly affecting the structure of the spray pipes. Moreover, the staggered nozzles can provide a thorough and uniform spraying point on the cross-section of the tower, increasing the probability of low-concentration sulfur oxides coming into contact with the spray droplets. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings of the embodiments will be briefly described below. Obviously, the drawings described below only involve some embodiments of this application and should not be construed as limiting this application.

[0019] Figure 1 This is a schematic diagram of the overall structure of the scrubbing tower in this embodiment; Figure 2 This is a side view of the scrubbing tower in this embodiment; Figure 3 This is a schematic cross-sectional view of the scrubbing tower in this embodiment; Figure 4 This is a schematic diagram of the internal structure of the scrubbing tower from one perspective in this embodiment; Figure 5 This is a schematic diagram of the internal structure of the scrubbing tower from another perspective in this embodiment; Figure 6 This is a schematic diagram of the side structure of the wedge-shaped support in this embodiment; Figure 7 This is a schematic diagram of the back structure of the wedge-shaped support in this embodiment; Figure 8 This is a schematic diagram of the reaction principle of the washing tower in this embodiment.

[0020] Figure label: 1. Tower; 2. Scrub water collection section; 3. Flue gas outlet section; 4. Tower bottom reinforcing rib; 5. Manhole; 7. Pre-spray pipe; 8. Suspension support; 9. Lifting lug; 10. Tower bottom base; 11. Wedge support; 110. L-shaped base; 111. Wedge rib; 112. Welded positioning plate; 12. Bend section; 13. Straight pipe section; 15. Lower packing layer; 16. Packing support plate; 17. Upper packing layer; 18. Packing clamping plate; 19. Lower spray pipe; 20. First spray pipe; 21. Second spray pipe; 22. Demisting support plate; 23. Demister; 24. Demisting clamping plate; 25. Demisting spray pipe; 201. Main pipe; 202. Main pipe support; 203. Branch pipe; 204. Branch pipe lug. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings, so as to more clearly understand the purpose, features and advantages of this utility model. It should be understood that the embodiments shown in the accompanying drawings are not intended to limit the scope of this utility model, but are only for illustrating the essential spirit of the technical solutions of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0022] Unless the context requires otherwise, throughout the specification and claims, the word “comprising” and its variations, such as “including” and “having”, shall be understood to have an open, inclusive meaning, that is, to be interpreted as “including, but not limited to”.

[0023] Throughout this specification, references to "an embodiment" or "an embodiment" indicate that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Therefore, the appearance of "in an embodiment" or "an embodiment" in various places throughout the specification does not necessarily refer to the same embodiment. Furthermore, a particular feature, structure, or characteristic may be combined in any manner in one or more embodiments.

[0024] The singular forms “a” and “the” used in this specification and the appended claims include plural references unless otherwise expressly stated herein. It should be noted that the term “or” is generally used to mean “and / or” unless otherwise expressly stated herein.

[0025] In the following description, in order to clearly demonstrate the structure and working method of this utility model, a number of directional terms will be used. However, terms such as "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", and "down" should be understood as convenient terms and not as limiting terms.

[0026] The implementation details of the embodiments of this utility model will be described in detail below with reference to the accompanying drawings. The following implementation details are provided only for ease of understanding and are not necessary for implementing this solution.

[0027] This embodiment provides a high-efficiency open-type desulfurization scrubbing tower for ships, which aims to solve the problems of low efficiency and poor effect of existing open-type desulfurization scrubbing towers in treating medium and low concentration sulfur-containing gases, as well as the limited scope of application. It can not only expand the scope of application and significantly improve the efficiency and effect of waste gas desulfurization, so that the purified gas fully meets the IMO emission requirements, but also facilitate the assembly, welding and positioning of the tower cylinder and spray pipes, thereby improving the structural reliability of the open-type desulfurization scrubbing tower.

[0028] In this embodiment, reference Figures 1 to 7 As shown, the high-efficiency shipboard open-type desulfurization scrubbing tower specifically includes a vertical cylindrical tower 1 and an arc-shaped flue gas inlet duct. The tower 1 is fixed by an integrated external support frame, which includes four tower base pedestals 10 evenly distributed at the bottom and an upper spatial stabilization structure. The upper stabilization structure adopts a combination of load-bearing ring beams surrounding the tower 1 and diagonal braces, rigidly connecting the upper part of the tower area to the main structure of the ship's deck. The tower 1 is divided into three sections from bottom to top: a wash water collection section 2, a spray scrubbing section, and a flue gas outlet section 3. Its vertical design minimizes the deck projection area, resulting in a compact layout that facilitates installation and pipeline integration in confined engine room or deck spaces. The spray scrubbing section includes a lower packing layer 15, an upper packing layer 17, and a demister 23, spaced apart from bottom to top. A lower spray pipe 19 is installed above the lower packing layer 15, and an upper spray pipe assembly is installed above the upper packing layer 17. The upper spray pipe assembly includes a first spray pipe 20 and a second spray pipe 21, spaced apart from bottom to top. The spray pipes are welded pipes extending horizontally, specifically including a straight main pipe 201 and spray pipes 21 distributed along the main pipe 201. In one case, the multiple branch pipes 203 on both sides of 01 are distributed at equal intervals. The branch pipes 203 are vertically connected to the main pipe 201 in the same plane. The branch pipes 203 are equipped with multiple downward nozzles. The main pipes 201 of the first spray pipe 20 and the second spray pipe 21 are aligned along the height direction and the branch pipes 203 and nozzles are staggered. The flue gas inlet pipe is divided into a straight pipe section 13 and a bent pipe section 12 from top to bottom. The straight pipe section 13 includes a pre-spray pipe 7. The lower part of the spray washing section is equipped with an exhaust gas inlet. The bent pipe section 12 is connected to the exhaust gas inlet. The bottom of the flue gas inlet bent pipe section 12 is welded with a wedge-shaped support 11, which is rigidly connected to the hull.

[0029] refer to Figure 8As shown, this embodiment uses a "layered and graded" approach to treat the high-temperature sulfur-containing exhaust gas emitted from the ship's engine. Specifically, after the high-temperature sulfur-containing exhaust gas enters the flue gas inlet pipe, seawater from the pre-spray pipe 7 pre-cools and humidifies the exhaust gas, removing most of the large particulate pollutants and reducing the concentration of sulfur-containing exhaust gas. The flue gas then enters the bottom of the tower 1 from the exhaust gas inlet, passing through the lower packing layer 15 and the lower spray pipe 19 for primary treatment. At this time, a large amount of alkaline seawater, as the main scrubbing liquid, enters the pipe from the seawater inlet end E1 of the lower spray pipe 19 and passes through the nozzles. The gas is sprayed downwards, forming a liquid film layer on the lower packing layer 15, which makes full countercurrent contact with the rising exhaust gas. Through physical washing and chemical neutralization reactions, most of the sulfur oxides in the exhaust gas are removed. The gas then undergoes secondary treatment via the upper packing layer 17 and the upper spray pipe assembly. The spraying principle is the same as above. Here, the spray pipes in the lower spray pipe 19 and the upper spray pipe assembly can adopt basically the same structure. The secondary treatment uses a combination of the first spray pipe 20 and the second spray pipe 21, utilizing spatially staggered nozzles to form a more thorough and uniform spray pattern on the inner cross-section of the tower 1 than the primary treatment. (Refer to...) Figure 4 and Figure 5 As shown, the nozzles are staggered in height, increasing the likelihood of low-concentration sulfur oxides coming into contact with the spray droplets. The washed gas continues to rise, entering the demister 23 area for demisting before being discharged from the flue gas outlet. Here, seawater supplied by the online flushing inlet E2 continuously or intermittently flushes the demister 23 to prevent it from being clogged by pollutants and crystals, ensuring that the demister 23 can effectively capture droplets carried in the exhaust gas. The purified clean gas passes through the demister 23 and finally exits the tower 1 through the flue gas outlet flange, entering the chimney and being discharged into the atmosphere. The acidic scrubbing water formed after washing falls to the bottom of the tower and is discharged through the bottom drain outlet. The entire tower 1 is stably supported by the tower base 10 and structurally reinforced by the tower bottom reinforcing ribs 4 to withstand the complex loads during ship navigation. By using the above-mentioned "layered and graded" treatment method for sulfur-containing waste gas, the efficiency and effect of waste gas desulfurization can be significantly improved, making the scrubbing tower suitable for treating both high-sulfur and low-sulfur waste gas, thus expanding the application range of the scrubbing tower, and ensuring that the purified gas fully meets the IMO emission requirements.

[0030] Here, the first spray pipe 20 and the second spray pipe 21 can adopt basically the same spray pipe structure. Only the design positions of the branch pipe 203 and the nozzle need to be adjusted accordingly to obtain the above-mentioned pipe fittings. The manufacturing process can be completely unified into one process. The main pipes 201 of the first spray pipe 20 and the second spray pipe 21 are aligned along the height direction, and the branch pipes 203 and the nozzles are staggered. This layout can facilitate the assembly, welding and positioning of the spray pipe and the tower 1 without affecting the structure of the spray pipe. In addition, the staggered nozzles can provide a thorough and uniform spraying point on the inner cross section of the tower 1, increasing the probability of low concentration sulfur oxides coming into contact with the spray droplets.

[0031] In this embodiment, the main pipes 201 of the lower spray pipe 19, the first spray pipe 20, and the second spray pipe 21 are aligned along the height direction. Here, the lower spray pipe 19 can adopt the same structure as the first spray pipe 20 or the second spray pipe 21. In this way, the lower spray pipe 19, the first spray pipe 20, and the second spray pipe 21 can be manufactured in the same batch. Since the main pipes 201 of the lower spray pipe 19, the first spray pipe 20, and the second spray pipe 21 are aligned along the height direction, the assembly of each spray pipe can be completed in a straight line, which can improve the assembly efficiency.

[0032] Specifically, the first spray pipe 20 and the second spray pipe 21 are located on the same side, and multiple branch pipes 203 are arranged alternately along the direction of extension of the main pipe 201. The length variation of the multiple branch pipes 203 on the same side is matched with the inner diameter of the tower 1. This can maximize the spraying area of ​​the spray pipe in the tower 1 and facilitate the assembly of the spray pipe with the inner wall of the tower 1 and its components such as the branch pipe lugs. Specifically, the tower 1 is provided with multiple horizontal rib seats, each corresponding to a number of main pipes 201. One end of each main pipe 201 is provided with a horizontal main pipe 201 support, which is supported on the corresponding rib seat and fixed with bolts. By limiting the position of the main pipes 201 in the height direction, the height position of the spray pipe inside the tower 1 is limited. The tower 1 is provided with multiple vertical connecting pieces, each corresponding to a number of branch pipes 203. One end of each branch pipe 203 is provided with a vertical branch pipe 203 ear plate, which is attached to the corresponding connecting piece along the side and fixed with bolts. By limiting the radial position of the multiple branch pipes 203, the radial position of the spray pipe inside the tower 1 is limited, preventing the spray pipe from shaking.

[0033] In this embodiment, reference Figure 2 As shown, a demisting spray pipe 25 is installed above the demister 23. The demisting spray pipe 25 has the same structure as the first spray pipe 20 and the second spray pipe 21, and the main pipes 201 of the three are aligned along the height direction. The demisting spray pipe 25 has an online rinsing inlet end E2 extending out of the tower 1. The first spray pipe 20, the second spray pipe 21 and the lower spray pipe 19 all have spray seawater inlet ends E1 extending out of the tower 1. The online rinsing inlet ends E2 and each spray seawater inlet end E1 are arranged in a straight line at intervals along the height direction, which also facilitates the connection and positioning of the inlet end with the external washing liquid supply equipment.

[0034] refer to Figures 6 to 7As shown, in this embodiment, the wedge-shaped support 11 includes an L-shaped base 110, two wedge-shaped ribs 111 welded to the L-shaped base 110, and a welded positioning plate 112 connected to the inclined surfaces of the two wedge-shaped ribs 111. The welded positioning plate 112 is welded to the bend section 12, and the L-shaped base 110 is rigidly connected to the hull. The wedge-shaped support 11 itself has the advantage of absorbing and dispersing stress on the wedge surface. At the same time, the wedge-shaped ribs 111 can significantly enhance the structural strength around the welded positioning plate, preventing welding deformation when the welded positioning plate is welded to the flue gas inlet pipe. Here, the L-shaped base 110 can provide two mutually perpendicular positioning surfaces. When the bend section 12 of the flue gas inlet pipe is in working condition, the stress generated by the surface fluid flow can be dispersed to the two positioning surfaces, thereby effectively reducing the vibration and impact of the flue gas inlet pipe and maintaining system stability.

[0035] In this embodiment, reference Figures 1 to 2 As shown, the washing water collection section 2 includes a bottom drain outlet and a smooth slope section that tapers from the spray washing section to the bottom drain outlet. The slope design at the bottom of the washing tower controls better contact between the washing water and some of the exhaust gas, maximizing the desulfurization of the exhaust gas. Multiple tower bottom reinforcing ribs 4 are evenly spaced along the circumference of the smooth slope section. These reinforcing ribs 4 extend from the spray washing section to the bottom drain outlet. The reinforcing ribs effectively disperse stress, preventing deformation or resonance of the tower body under harsh sea conditions, ensuring a long service life and high reliability of the equipment, and giving the tower 1 a better ability to bear the weight of the washing water inside the tower.

[0036] In this embodiment, the flue gas outlet section 3 adopts a tapered transition section with a flange opening at the top as the purified gas outlet. The cone angle of the transition section is designed with optimized flow field to smoothly guide the airflow into the outlet pipe, effectively reducing eddies and pressure loss.

[0037] In this embodiment, reference Figure 3 As shown, the upper and lower packing layers can adopt roughly the same installation structure. Specifically, the packing layer includes a packing support plate 16, a packing clamping plate 18, and packing. The packing is fixedly installed between the packing support plate 16 and the packing clamping plate 18.

[0038] In this embodiment, multiple sets of manholes 5 are arranged at intervals along the height of the tower 1. Each set of manholes 5 corresponds to at least one of the packing layer, spray pipe, and demister 23. The manholes 5 are elliptical openings. This design allows workers to independently inspect, clean, or replace any specific layer inside without disassembling the entire tower, greatly reducing maintenance and time costs. The elliptical openings ensure passage while minimizing the structural strength of the tower compared to large rectangular openings.

[0039] In summary, this embodiment demonstrates that the above-described method of "layering and grading" treatment of sulfur-containing waste gas can significantly improve the efficiency and effectiveness of waste gas desulfurization, making the scrubbing tower suitable for treating both high-sulfur and low-sulfur waste gas, thus expanding the applicable scope of the scrubbing tower, and ensuring that the purified gas fully meets IMO emission requirements.

[0040] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0041] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high-efficiency open-type desulfurization scrubbing tower on board, characterized in that, include: The tower is divided into a washing water collection section, a spray washing section, and a flue gas outlet section from bottom to top. The spray washing section includes a lower packing layer, an upper packing layer, and a demister that are spaced apart from bottom to top. A lower spray pipe is installed above the lower packing layer, and an upper spray pipe assembly is installed above the upper packing layer. The upper spray pipe assembly includes a first spray pipe and a second spray pipe that are spaced apart from bottom to top. Each spray pipe includes a straight main pipe and multiple branch pipes distributed on both sides of the main pipe. The branch pipes are vertically connected to the main pipe and are equipped with multiple nozzles. The main pipes of the first and second spray pipes are aligned along the height direction, and the branch pipes and nozzles are staggered. The flue gas inlet pipe is divided into a straight section and a curved section from top to bottom. The straight section includes a pre-spray pipe. The lower part of the spray washing section is provided with an exhaust gas inlet. The curved section is connected to the exhaust gas inlet. A wedge-shaped support is welded to the bottom of the curved section. The wedge support is rigidly connected to the hull.

2. The high-efficiency shipboard open desulfurization scrubbing tower according to claim 1, characterized in that, The main pipes of the lower spray pipe, the first spray pipe, and the second spray pipe are aligned along the height direction.

3. The high-efficiency shipboard open desulfurization scrubbing tower according to claim 1, characterized in that, The first and second spray pipes are located on the same side, and multiple branch pipes are arranged alternately along the direction of the main pipe extension, and the length variation of the multiple branch pipes on the same side is fitted to the inner diameter of the tower.

4. The high-efficiency shipboard open desulfurization scrubbing tower according to claim 2, characterized in that, A demisting spray pipe is installed above the demister. The demisting spray pipe has the same structure as the first spray pipe and the second spray pipe, and the main pipes of the three are aligned along the height direction. The demisting spray pipe has an online flushing inlet end that extends out of the tower. The first spray pipe, the second spray pipe, and the lower spray pipe all have spray seawater inlet ends that extend out of the tower. The online flushing inlet ends and each spray seawater inlet end are arranged at a straight interval along the height direction.

5. The high-efficiency shipboard open desulfurization scrubbing tower according to any one of claims 1 to 4, characterized in that, The tower is equipped with multiple horizontal rib seats, each corresponding to a single main pipe. One end of each main pipe is equipped with a horizontal main pipe support, which is supported on the corresponding rib seat and fixed with bolts. The tower is also equipped with multiple vertical connecting plates, each corresponding to a single branch pipe. One end of each branch pipe is equipped with a vertical branch pipe lug, which is attached to the corresponding connecting plate along the side and fixed with bolts.

6. The high-efficiency shipboard open desulfurization scrubbing tower according to claim 1, characterized in that, The wedge-shaped support includes an L-shaped base, two wedge-shaped ribs welded to the L-shaped base, and a welded positioning plate connected to the inclined surface of the two wedge-shaped ribs. The welded positioning plate is welded to the bent pipe section, and the L-shaped base is rigidly connected to the hull.

7. The high-efficiency shipboard open desulfurization scrubbing tower according to claim 1, characterized in that, The washing water collection section includes a bottom drain outlet and a smooth slope section that transitions from the spray washing section to the bottom drain outlet. Multiple tower bottom reinforcing ribs are evenly spaced along the circumferential direction on the smooth slope section, and the tower bottom reinforcing ribs extend from the spray washing section to the bottom drain outlet.

8. The high-efficiency shipboard open desulfurization scrubbing tower according to claim 1, characterized in that, The flue gas outlet section adopts a tapered transition section with a flange opening at the top as the purified gas outlet.

9. The high-efficiency shipboard open desulfurization scrubbing tower according to claim 1, characterized in that, The packing layer includes a packing support plate, a packing clamping plate, and packing material, wherein the packing material is fixedly installed between the packing support plate and the packing clamping plate.

10. The high-efficiency shipboard open desulfurization scrubbing tower according to claim 9, characterized in that, Multiple sets of manholes are arranged at intervals along the height direction on the tower. Each set of manholes corresponds to at least one of the packing layer, spray pipe and demister. The manholes are elliptical holes.

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