A ship desulfurization tower

Abstract

The present invention provides a ship desulfurization tower, belonging to the technical field of desulfurization. It solves the problem of the desulfurization tower adapting to the ship working conditions in the prior art. The ship desulfurization tower includes a tower body, a smoke inlet, a smoke outlet, and a spray layer located between the smoke inlet and the smoke outlet. The spray layer includes a deformation frame, and the deformation frame includes a scissor unit. The scissor unit includes a first rod body and a second rod body. The middle parts of the first rod body and the second rod body are rotationally connected through a middle hinge. The corresponding end parts of the rod bodies of adjacent scissor units are rotationally connected through end hinges to form the deformation frame with an overall arc shape. Nozzles are arranged on the first rod body and the second rod body. By arranging the nozzles on the deformation frame to form a spray layer that can be flexibly adjusted, the present invention can realize flexible adjustment of spraying according to the ship working conditions or the flue gas conditions in the tower body, so as to adapt to the desulfurization requirements or facilitate the maintenance of equipment and meet the use requirements of the ship.

Description

Technical Field

[0001] The invention belongs to the technical field of desulfurization towers, in particular to a desulfurization tower used on ships. Background Art

[0002] The International Maritime Organization (IMO), in accordance with the global marine sulfur limit regulations, requires ships registered with classification societies in member countries to actively implement the resolution. From January 1, 2020, the sulfur content of marine fuel used by seagoing ships entering the emission control area shall be less than 0.5%. The Ministry of Transport of China has also issued relevant "sulfur limit" regulations for Chinese waters, which has accelerated the development of the ship desulfurization market. At present, the desulfurization of fuel flue gas by ships mainly uses a desulfurization tower, which is equipped with a spray layer. The spray layer is mainly a nozzle, which sprays liquid to absorb sulfides in the flue gas when the flue gas passes through the desulfurization tower.

[0003] Ship desulfurization towers mainly include open-loop desulfurization towers, closed-loop desulfurization towers, and hybrid desulfurization towers.

[0004] The open-loop desulfurization tower uses seawater to clean the flue gas. Seawater is usually alkaline, which makes it have natural acid-base buffering capacity and the ability to absorb sulfides. The seawater neutralizes the sulfides in the flue gas to achieve the purpose of desulfurization. The washing process of the open-loop desulfurization tower: Seawater is pumped into the desulfurization tower and sprayed out through the nozzle inside the desulfurization tower, reacting with the flue gas passing through the desulfurization tower. The flue gas after desulfurization continues to go up through the gas monitoring system and then discharged into the atmosphere, while the seawater solution that neutralizes the sulfide goes down through the water quality detection system and then flows into the sea through the seawater discharge system. The open-loop desulfurization tower system has a relatively simple structure and is relatively easier to install, modify and install on ships. The direct use of seawater saves the cost of chemicals, but whether it will have a long-term impact on the marine environment is not suitable for some seawater with strict emission requirements.

[0005] The closed-loop desulfurization tower adds desulfurization agents to fresh water to absorb sulfides in the flue gas. Fresh water is clean water for recycling, while seawater is only used as cooling water to cool the circulating fresh water. Seawater does not directly react with the flue gas as a washing solution. The washing process of the closed-loop desulfurization tower: first add an appropriate amount of desulfurization agent according to the load of the ship. During the desulfurization work, the desulfurization agent and fresh water are mixed in the circulation cabinet and then enter the desulfurization tower. The action process in the desulfurization tower is similar to that of the open-loop type, but the destination of the solution after washing is different from that of the open type, which is directly discharged into the sea. The solution after washing in the closed-loop desulfurization tower circulates into the circulation cabinet. When the solution concentration and residual impurities in the circulation cabinet reach a fixed value, the water treatment unit begins to separate the solution. The separated residual impurities are moved into the storage cabinet, and the separated water re-enters the circulation cabinet and replenishes the desulfurization agent. The washing solution after replenishing the agent is cooled by the seawater cooling system and re-enters the desulfurization tower, thereby starting the circulation washing work.

[0006] The freshwater desulfurization part of the closed-loop desulfurization tower system is a closed circulation design. The mixed solution of fresh water and desulfurizer participating in the reaction is not discharged directly into the ocean. The residue in the storage cabinet will be transferred and processed when the ship docks. Therefore, the closed-loop desulfurization tower is truly zero-emission. However, the closed-loop desulfurization tower has many system components and occupies a large space on the ship. The cost of installation, modification and additional installation also increases accordingly, and the desulfurization agent is also a consumable.

[0007] The hybrid desulfurization tower is an organic combination of open-loop and closed-loop desulfurization towers. It can switch between open and closed modes according to demand during desulfurization work. The basic components of the hybrid desulfurization tower system include the components of the open-loop and closed-loop desulfurization tower systems, and its control module adds functions such as automatic switching and more detection and monitoring points. Hybrid desulfurization tower washing process: In the open mode, seawater is used to wash the flue gas desulfurization, which is the same as the working mode of the open-loop desulfurization tower; in the closed mode, a circulating solution of fresh water and desulfurizer is used to wash the flue gas desulfurization, which is the same as the working mode of the closed-loop desulfurization tower.

[0008] The hybrid desulfurization tower system can flexibly choose between the two modes. In waters without drainage requirements, the open mode can be used to utilize natural seawater for desulfurization, reducing the consumption of desulfurizers and reducing costs; in waters where sulfur emissions are strictly controlled, the closed mode can be used to achieve zero emission requirements. The benefits of the dual mode also come at a price. The initial installation and modification costs also increase significantly, occupying more ship space and requiring two towers, which is extremely disadvantageous for ships with precious space.

[0009] The functions of each spray layer are usually different, and the operating conditions of the ship's main engine often change, causing the flue gas velocity, density, temperature, and sulfur content to fluctuate. For example, when the ship is sailing, the power is high, the flue gas is large, the temperature is high, and the wind and waves are large. The exhaust flue gas is easy to be blown away in time, and the exhaust seawater is easy to be diluted and degraded, which is suitable for open-loop desulfurization; when sailing or mooring in the harbor, the flue gas is small, the temperature is low, and the wind and waves are small. The exhaust flue gas is not easy to be blown away in time, and the exhaust seawater is not easy to be diluted and degraded, which is suitable for closed-loop desulfurization towers. If the flue gas temperature is too high, it needs to be cooled by spraying cooling water when the flue gas just enters the desulfurization tower, so as to reduce the speed and temperature in time, thereby extending the residence time in the tower and reducing the impact and corrosion on the objects in the tower; if the flue gas temperature is not high, it will be further reduced after passing through the spray layer. When it is discharged from the exhaust port, if the external temperature is also relatively low, it is easy for condensation droplets to form near the exhaust port of the tower and fall down. This has a greater impact on moored ships. The droplets are not easy to be blown away and are more likely to fall onto the ship, causing pollution. At this time, there is no need to spray cooling water. At this time, the cooling water spray layer is idle. If it is still at the bottom layer, it will not only be corroded by the liquid sprayed from above, but also interfere with the desulfurization.

[0010] In addition, when a ship sails on the vast ocean, it takes a long time to dock. If a certain spray layer of the desulfurization tower breaks down and cannot be repaired in time, and the broken spray layer is not removed in time, it will not only affect the desulfurization effect of other spray layers but also accelerate its own damage, such as scaling and corrosion. Moreover, the existing desulfurization towers are not convenient for the removal and adjustment of the spray layer.

[0011] In summary, there is an urgent need for a ship desulfurization tower with a spray layer that can be flexibly adjusted. Summary of the Invention

[0012] The purpose of the present invention is to address the above problems existing in the prior art and propose a ship desulfurization tower, which has an adjustable spray layer.

[0013] The purpose of the present invention can be achieved by the following technical solutions: A ship desulfurization tower includes a tower body, a smoke inlet, a smoke outlet, and a spray layer located between the smoke inlet and the smoke outlet. The spray layer includes a deformable frame, the deformable frame includes a scissor unit, the scissor unit includes a first rod and a second rod, the middle parts of the first rod and the second rod are rotatably connected by a middle hinge, the middle hinge is close to one end of the rod and far from the other end, the corresponding ends of the rods of adjacent scissor units are rotatably connected to each other by an end hinge to form the deformable frame with an overall arc shape. Nozzles are provided on the first rod and the second rod, and the nozzles are connected to an external liquid supply device through pipelines. A telescopic device is provided between the first rod and the second rod, and the telescopic device controls the change of the angle between the first rod and the second rod. The deformable frame is suspended in the tower body by a suspension device, and the suspension device controls the lifting of the deformable frame in the tower body.

[0014] In some embodiments, there are at least two deformable frames.

[0015] In some embodiments, the deformable frames are arranged in upper and lower layers in the tower body.

[0016] In some embodiments, the nozzles on different deformable frames are connected to different liquid supply devices.

[0017] In some embodiments, the deformable frame is suspended by two suspension rods, and the distance between the two suspension rods is controlled by a distance adjustment device.

[0018] In some embodiments, a middle deformable frame is provided in the middle of the tower body.

[0019] Compared with the prior art, the present ship desulfurization tower has the following advantages:

[0020] In the present invention, by arranging the nozzle on the deformation frame to form a spray layer that can be flexibly adjusted, the spray can be flexibly adjusted according to the ship's working conditions or the flue gas conditions in the tower body, so as to meet the desulfurization requirements, or facilitate the maintenance of the equipment and meet the usage requirements of the ship. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In the drawings (which are not necessarily drawn to scale), similar reference numerals may describe similar components in different views. Similar reference numerals with different letter suffixes may represent different examples of similar components. The drawings generally illustrate, by way of example and not limitation, the various embodiments discussed herein.

[0022] Figure 1 is a schematic diagram of a deformation frame arranged inside the tower body;

[0023] Figure 2 is Figure 1 a schematic diagram of the unfolded deformation frame;

[0024] Figure 3 is a schematic diagram of two deformation frames arranged inside the tower body;

[0025] Figure 4 is Figure 3 a schematic diagram of the two unfolded deformation frames;

[0026] Figure 5 is a schematic diagram of two layers of deformation frames arranged inside the tower body;

[0027] Figure 6 is Figure 5 a schematic diagram of the two layers of unfolded deformation frames;

[0028] Figure 7 is Figure 1 a top view schematic diagram inside the tower body of;

[0029] Figure 8 is Figure 2 a top view schematic diagram inside the tower body of;

[0030] Figure 9 is Figure 8 a schematic diagram of the deformation frame completely unfolded into a circle and a middle deformation frame arranged in the middle of the tower body;

[0031] Figure 10 is Figure 3 a top view schematic diagram inside the tower body of;

[0032] Figure 11 is Figure 4 a top view schematic diagram inside the tower body of;

[0033] Figure 12 is Figure 11 a schematic diagram of the middle deformation frame arranged in the middle of the tower body;

[0034] Figure 13 is Figure 5 a top view schematic diagram inside the tower body;

[0035] Figure 14 is Figure 6 a top view schematic diagram inside the tower body;

[0036] Figure 15 is Figure 14 a schematic diagram with a middle deformation frame provided in the middle of the tower body;

[0037] Figure 16 is a schematic diagram of Embodiment 2;

[0038] Figure 17 is Figure 16 a schematic diagram after the deformation frame is unfolded;

[0039] Figure 18 is Figure 16 a top view schematic diagram inside the tower body;

[0040] Figure 19 is Figure 17 a top view schematic diagram inside the tower body.

[0041] In the figure, tower body 1, smoke inlet 2, smoke outlet 3, tower top cover 4, deformation frame 5, first rod body 501, second rod body 502, middle hinge 503, inner end hinge 504, outer end hinge 505, nozzle 506, pipeline 6, telescopic cylinder 7, suspension device 8, suspension rod 9, bending section 901, middle deformation frame 10, spacing adjustment device 11. Specific Embodiments

[0042] The following are specific embodiments of the present invention, and the technical solutions of the present invention are further described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments, and the following embodiments do not limit the invention involved in the claims. In addition, all combinations of the features described in the embodiments are not necessarily essential to the solution of the invention.

[0043] Those of ordinary skill in the art should understand that all directional references (e.g., above, below, upward, up, downward, down, top, bottom, left, right, vertical, horizontal, etc.) are descriptively used in the drawings to assist the reader's understanding and do not represent (e.g., to the position, orientation, use, etc.) a limitation on the scope of the present invention defined by the appended claims. Additionally, the term "substantially" may refer to a slight inaccuracy or slight deviation in a condition, quantity, value, or dimension, some of which are within the manufacturing tolerances or tolerances.

[0044] Embodiment 1

[0045] As Figures 1 to 15As shown in the figure, a ship desulfurization tower includes a tower body 1, a smoke inlet 2, a smoke outlet 3, a tower top cover 4, and a spray layer located between the smoke inlet and the smoke outlet, which sprays liquid to absorb sulfides in the flue gas.

[0046] The spray layer mainly includes a deformable frame 5. The deformable frame includes scissor units. Each scissor unit includes two identical rod bodies, defined as the first rod body 501 and the second rod body 502. The middle parts of the first rod body and the second rod body are rotationally connected by a middle hinge 503 to form a scissor unit. The middle hinge is closer to one end of the rod body and farther from the other end, that is, the middle hinge is not in the middle position of the rod body.

[0047] The corresponding end parts of the rod bodies of adjacent scissor units are rotationally connected to each other by end hinges to form the deformable frame as a whole in an arc shape. As shown in Figure 7 、 8 、9, the arc length of the deformable frame will change with the change of the angle between the first rod body and the second rod body. For the convenience of description, it is defined that when the deformable frame deforms, the end hinge located on the inner side of the arc is the inner end hinge 504, and the end hinge located on the outer side of the arc is the outer end hinge 505.

[0048] Nozzles 506 are arranged on the first rod body and the second rod body, and the nozzles can also be arranged at the hinges. The nozzles are connected to an external liquid supply device through a pipeline 6 to supply liquid to the nozzles. For the sake of clear view, only the pipeline is schematically shown in Figure One .

[0049] A telescopic device is arranged between the first rod body and the second rod body. The telescopic movement of the telescopic device controls the change of the angle between the first rod body and the second rod body. For example, as shown in the figure, a telescopic cylinder 7 can be connected between the inner end hinge and the outer end hinge. When the telescopic cylinder shortens, the deformable frame becomes longer, that is, the deformable frame is in an unfolded state, so as to adjust the density and spraying position of the nozzles. Of course, it can also be other telescopic devices, as long as the distance between the inner end hinge and the outer end hinge can be adjusted.

[0050] The deformable frame is suspended in the tower body by a suspension device 8. The suspension device controls the lifting of the deformable frame in the tower body. The suspension device can be a suspension rod 9 controlled by a lifting device. By moving the suspension device, the deformable frame can be moved, so as to facilitate the adjustment of the spraying position or the replacement of the deformable frame. Of course, it can also be other suspension devices, such as a towing rope, and the lifting control is realized by taking in and paying out the towing rope.

[0051] As shown in Figure 5 、 6 、13, 14, there are at least two deformable frames, and four in this embodiment. Thus, the deformable frames can be arranged in upper and lower layers in the tower body.

[0052] The nozzles on different deformation frames can be connected to different liquid supply devices for spraying different liquids. For example, some can be used to spray seawater, some can be used to spray a mixed solution of fresh water and desulfurizing agent, or the spraying amounts of the nozzles on different deformation frames are different.

[0053] By moving the suspension rod body, the position of the deformation frame can be circumferentially moved to facilitate the flexible adjustment of the sprayed liquid at different positions according to the flue gas flow field conditions in the tower body. For example, if the sulfides or other particulate matters in a certain direction in the tower body are significantly higher (this can be measured by sensors or obtained from long-term experience. Affected by the ship's working conditions and equipment differences, the flue gas flow fields of the desulfurization towers on each ship have their own characteristics under different working conditions), the position of the deformation frame can be moved or the length of the deformation frame can be adjusted to change the position or density of the nozzles. Of course, this kind of adjustment is usually carried out periodically according to the voyage or season.

[0054] The four deformation frames can also be shortened to arcs with a central angle of 90 degrees, and then the four deformation frames can be adjacent to form a complete circular spray layer. At this time, the density of the nozzles is the largest. The middle part of the circular spray layer can be blocked by a middle deformation frame 10 with a smaller size. The number of middle deformation frames can be flexibly determined as long as the elongation of the middle deformation frame can form a small ring. The middle deformation frame only has a smaller size, and its structure is the same as that of the deformation frame close to the tower wall, and the deformation principle is the same. Of course, a fixed disk-shaped spray layer can also be used for blocking as long as it can block. Usually, the flue gas volume in the middle of the tower body is smaller than that near the tower wall, so the nozzle density in the middle can also be smaller.

[0055] Such as Figure 5 、 6 As shown in 13, 14, and 15, the four deformation frames can also form upper and lower two spray layers, two on the upper and two on the lower. Only the nozzle density becomes smaller at this time, and the distance between the upper and lower two spray layers can be adjusted by the suspension device.

[0056] When it is necessary to swap the upper and lower positions of the upper and lower spray layers, as shown in Figure 5 , the deformation frame can be first shortened so that there are vacancies between the deformation frames, so that the deformation frames of the upper and lower spray layers can pass through each other, thereby adjusting the spraying height or liquid type of different layers. Through this moving function, it is also convenient to take out or replace the spray layer, or use it when the ship is sailing. According to this principle, it can also be set into multiple layers to realize the movement of multiple layers, and each layer can also be composed of multiple deformation frames.

[0057] Embodiment 2

[0058] Such as Figure 16 、 17As shown in FIGS. 18 and 19, different from the above embodiments, the deformation frame is suspended by two suspension rods located at both ends of the deformation frame, and the distance between the two suspension rods is controlled by a distance adjusting device 11, so that the telescopic cylinder connected between the inner end hinge and the outer end hinge can be omitted, and the deformation control of the deformation frame can be achieved by controlling the suspension rods at both ends outside the tower body. In order not to affect the passing of the suspension rods between the upper and lower spraying layers, the suspension rods can be set in a bent state, that is, the bent section 901 towards the center, so that the suspension rods are located inside the arc of the deformation frame.

[0059] Although a number of terms are used more in this text, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention. For the execution order of actions, steps, etc. in the devices and methods shown in the specification and drawings, as long as there is no specific explicit order limitation and as long as the output of the previous process is not used in the subsequent process, they can be implemented in any order. The descriptions using "first", "then", etc. for convenience of description do not mean that they must be implemented in such an order.

[0060] The specific embodiments described herein are only illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar ways to substitute, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A ship desulfurization tower, comprising a tower body, a smoke inlet, a smoke outlet and a spray layer located between the smoke inlet and the smoke outlet, characterized in that, The spray layer includes a deformable frame, the deformable frame includes a scissor unit, the scissor unit includes a first rod and a second rod, the middle parts of the first rod and the second rod are rotatably connected by a middle hinge, the middle hinge is close to one end of the rod and far from the other end, the corresponding end parts of the rods of adjacent scissor units are rotatably connected to each other by end hinges to form the deformable frame as a whole in an arc shape, nozzles are arranged on the first rod and the second rod, the nozzles are connected to an external liquid supply device through pipelines, a telescopic device is arranged between the first rod and the second rod, and the telescopic device controls the change of the angle between the first rod and the second rod. The deformable frame is suspended in the tower body by a suspension device, and the suspension device controls the lifting of the deformable frame in the tower body; there are four deformable frames, and the four deformable frames also form upper and lower spray layers, the upper two deformable frames and the lower two deformable frames. The deformable frame is suspended by two suspension rods located at both ends of the deformable frame, and the distance between the two suspension rods is controlled by a distance adjusting device. By controlling the suspension rods at both ends outside the tower body, the deformation control of the deformable frame is realized. The suspension rod has a bent section towards the center, so that the suspension rod is located inside the arc of the deformable frame.

2. The ship desulfurization tower according to claim 1, wherein The nozzles on different deformable frames are connected to different liquid supply devices.

3. The ship desulfurization tower according to claim 1, characterized in that, A middle deformable frame is arranged in the middle of the tower body.

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