Marine desulfurization sewage treatment device and method

Abstract

The invention discloses a marine desulfurization sewage treatment device and method, and relates to the technical field of sewage treatment.The marine desulfurization sewage treatment device comprises a desulfurization reaction tank, the desulfurization reaction tank is provided with a chemical inlet, a sewage inlet and a purified water outlet, a partition plate is fixedly arranged in the desulfurization reaction tank, and a water passing opening is formed in the partition plate; a water passing opening is formed in the middle of the desulfurization reaction tank, a micro-filtration membrane is arranged in the water passing opening, a water filtering tank is fixedly arranged in the desulfurization reaction tank, the water filtering tank penetrates through the partition plate, the sewage inlet is communicated with the water filtering tank, the water filtering tank is filled with a filter material, the water filtering tank is provided with a plurality of water outlet holes, the water outlet holes are located below the partition plate, and the purified water outlet is located above the partition plate. The marine desulfurization sewage treatment device disclosed by the invention is compact in structure, small in occupied area and suitable for being used in a narrow space of a ship, has relatively high treatment efficiency and a good purification effect, and ensures that the treated water quality reaches a strict emission standard.

Description

Technical Field

[0001] The present application relates to the technical field of sewage treatment, and in particular to a marine desulfurization sewage treatment device and method. Background Art

[0002] With the improvement of global environmental awareness and the increasingly stringent sulfur oxide emission standards of the International Maritime Organization (IMO), the shipping industry is facing tremendous pressure to reduce emissions. To this end, many shipping companies have begun to install exhaust gas cleaning equipment such as desulfurization towers on their ships to remove sulfur dioxide from exhaust gas by seawater washing. This technology not only helps to reduce air pollution, but also meets the requirements of international environmental regulations and promotes sustainable development. However, this process will produce a large amount of wastewater containing heavy metal ions, suspended solids and other harmful substances. How to effectively treat this wastewater has become a major challenge facing the industry.

[0003] At present, the method for treating ship desulfurization wastewater mainly adopts physical precipitation. Specifically, large solid impurities in sewage are removed by physical filtration, and then specific agents are added to the wastewater to cause the pollutants to form insoluble precipitates to achieve separation. Finally, the trace pollutants remaining in the water are removed by a microfiltration membrane system. Although the existing physical precipitation method can achieve the treatment of desulfurization wastewater to a certain extent, the existing physical precipitation method requires a large amount of equipment and a high space occupancy rate, which is a significant problem for ships with limited space. Summary of the invention

[0004] In view of the problems existing in the prior art, the present application provides a marine desulfurization wastewater treatment device and method.

[0005] In the first aspect, the present application provides a marine desulfurization wastewater treatment device, which adopts the following technical solution: A marine desulfurization wastewater treatment device comprises a desulfurization reaction tank, wherein the desulfurization reaction tank is provided with a reagent inlet, a wastewater inlet and a clean water outlet, a partition is fixedly arranged inside the desulfurization reaction tank, a water through hole is opened on the partition, a microfiltration membrane is arranged in the water through hole, a water filter tank is fixedly arranged inside the desulfurization reaction tank, the water filter tank penetrates the partition, the wastewater inlet is connected with the water filter tank, the water filter tank is filled with filter material, the water filter tank is provided with a plurality of water outlets, and the water outlets are located below the partition, and the clean water outlet is located above the partition.

[0006] Optionally, a distribution water pipe is fixedly installed in the desulfurization reaction tank and below the partition. The distribution water pipe is arranged along the circumference of the desulfurization reaction tank, and a plurality of distribution holes are opened on the side wall of the distribution water pipe. A water injection cylinder is fixedly installed in the desulfurization reaction tank, and the water injection cylinder is connected to the distribution water pipe. A plunger is slidably installed in the water injection cylinder, and the desulfurization reaction tank is provided with a first driving member for driving the plunger to slide.

[0007] Optionally, the plunger is provided with a center hole, a center column is slidably inserted into the center hole, a baffle is fixedly provided on the top of the center column, a limiting ring is sleeved on the center column and below the plunger, a water hole is provided on the side wall of the center column, and the first driving member is connected to the center column for driving the center column to move.

[0008] Optionally, a reagent delivery pipe is provided in the desulfurization reaction tank, one end of the reagent delivery pipe is connected to the reagent inlet, and the other end of the reagent delivery pipe is connected to the water injection cylinder.

[0009] Optionally, a sewage outlet is provided at the bottom of the desulfurization reaction tank, and a valve is provided at the sewage outlet.

[0010] Optionally, a pressure plate is provided in the desulfurization reaction tank for sliding in the vertical direction. The pressure plate is provided below the partition and is adapted to the desulfurization reaction tank. The desulfurization reaction tank is provided with a second driving member for driving the pressure plate to slide. A material drop opening is provided on the pressure plate. A sealing plate is hinged at the bottom of the pressure plate, and the sealing plate is used to close the material drop opening. An elastic member is provided on the pressure plate for driving the sealing plate to deflect away from the pressure plate.

[0011] Optionally, a filter material outlet connected to a water filter tank is provided on the side wall of the desulfurization reaction tank, the desulfurization reaction tank is provided with a sealing assembly for closing the filter material outlet, and a filter material replenishing port connected to the water filter tank is provided on the top of the desulfurization reaction tank.

[0012] Optionally, the sealing assembly includes a blocking cylinder and a limiting member, wherein the blocking cylinder is slidably disposed in the filter material outlet and is connected to the filter material outlet, and the limiting member is used to prevent the blocking cylinder from sliding. An end plate is provided at the end of the blocking cylinder away from the desulfurization reaction tank, and a discharge port is opened on the side wall of the blocking cylinder.

[0013] Optionally, a filter plate is fixedly installed in the water filter tank, and the horizontal height of the filter plate is higher than the clean water outlet, the filter material is arranged above the filter plate, a plurality of water filter holes are arranged on the filter plate, the filter material outlet is arranged above the filter plate, and the filter plate is inclined downwardly close to the filter material outlet.

[0014] In the second aspect, the present application provides a method for treating marine desulfurization wastewater, which adopts the following technical solution: A method for treating marine desulfurization wastewater comprises the following steps: S1. Add precipitation reagent into the desulfurization reaction tank through the reagent inlet; S2, sewage enters the water filter tank through the sewage inlet, is initially filtered through the filter material to remove large solid impurities, and the filtered sewage flows out through the water outlet and enters the space under the partition; S3, sewage enters the space below the partition, mixes with the precipitation agent, forms insoluble precipitate, and effectively removes suspended solids and heavy metal ions in the desulfurization sewage; S4. The sewage after sedimentation treatment enters the space above the partition through the water inlet on the partition. During this process, the microfiltration membrane further intercepts fine particles and suspended matter in the sewage to ensure that the water quality meets the discharge standards. The purified water is discharged through the clean water outlet.

[0015] In summary, the present application includes at least one of the following beneficial technical effects: 1. The marine desulfurization wastewater treatment device of the present application has a compact structure and a small footprint, and is suitable for use in the narrow space of a ship. It also has a high treatment efficiency and a good purification effect, and can effectively remove suspended matter and heavy metal ions in desulfurization wastewater, ensuring that the treated water quality meets strict discharge standards; specifically, a precipitation agent is added to the desulfurization reaction tank through the agent inlet, and the sewage enters the filter tank through the sewage inlet, and is initially filtered through the filter material to remove large particles of solid impurities. The filtered sewage flows out through the outlet hole, enters the space below the partition, and mixes with the precipitation agent to form an insoluble precipitate, thereby effectively removing suspended matter and heavy metal ions in the desulfurization wastewater. After that, the sewage enters the space above the partition through the water inlet on the partition. In this process, the microfiltration membrane further intercepts fine particles and suspended matter in the sewage to ensure that the water quality meets the discharge standards. The purified water is discharged through the clean water outlet, realizing efficient desulfurization wastewater treatment.

[0016] 2. The present application sets a distribution water pipe in the desulfurization reaction tank and below the partition. The pressure in the water injection cylinder can be adjusted by sliding the plunger, so that high-pressure water columns are formed at the distribution hole positions of the distribution water pipe, thereby accelerating the mixing effect of sewage and precipitation agents and improving sewage treatment efficiency.

[0017] 3. This application sets a sewage outlet at the bottom of the desulfurization reaction tank and sets a valve at the sewage outlet. By regularly opening the sewage outlet, the sludge and impurities generated in the sewage treatment process can be effectively discharged, thereby avoiding the large accumulation of sludge and impurities in the desulfurization reaction tank, improving the sewage treatment efficiency, and simplifying the operation process and reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1is a cross-sectional view of the overall structure of an embodiment of the present application; Figure 2 It is a schematic diagram of the structure of the water filter tank used in the embodiment of the present application; Figure 3 is a schematic diagram of the structure of the plunger used in the embodiment of the present application; Figure 4 It is a schematic diagram of the structure of the pressure plate used to express the embodiment of the present application.

[0019] Description of reference numerals: 100, desulfurization reaction tank; 101, reagent inlet; 102, sewage inlet; 103, clean water outlet; 104, filter material outlet; 105, filter material replenishment port; 106, cover; 107, limit screw; 108, handle; 109, distribution water pipe; 110, distribution hole; 111, first driving member; 112, reagent delivery pipe; 113, sewage outlet; 114, valve; 115, second driving member; 1 16. Transmission rod; 2. Partition plate; 21. Water outlet; 3. Water filter tank; 31. Water outlet; 32. Filter plate; 4. Blocking cylinder; 41. End plate; 42. Discharge port; 43. Sealing rubber ring; 44. Connecting block; 5. Water injection cylinder; 51. Plunger; 511. Center hole; 52. Center cylinder column; 521. Baffle; 522. Limiting ring; 523. Water outlet; 6. Pressing plate; 61. Dropping port; 62. Sealing plate; 63. Elastic part. DETAILED DESCRIPTION

[0020] The following will be combined with the attached Figure 1 -Attached Figure 4 , the technical solutions in the embodiments of the present invention are clearly and completely described. The described embodiments are only possible technical implementations of the present invention, not all possible implementations. Those skilled in the art can completely combine the embodiments of the present invention to obtain other embodiments without creative work, and these embodiments are also within the scope of protection of the present invention.

[0021] The inventor of the present application has found that the existing physical precipitation method for treating desulfurized wastewater requires a large amount of equipment and a high space occupancy rate, which is not conducive to the application of ships. Therefore, the present application discloses a desulfurized wastewater treatment device for ships, which mainly adopts the following scheme: The present application embodiment discloses a marine desulfurization wastewater treatment device. Figure 1, including a desulfurization reaction tank 100, the desulfurization reaction tank 100 is provided with a reagent inlet 101, a sewage inlet 102 and a clean water outlet 103, a partition 2 is fixedly arranged in the desulfurization reaction tank 100, a water port 21 is opened on the partition 2, a microfiltration membrane 22 is arranged in the water port 21, a water filter tank 3 is fixedly arranged in the desulfurization reaction tank 100, the water filter tank 3 penetrates the partition 2, the sewage inlet 102 is connected with the water filter tank 3, the water filter tank 3 is filled with filter material, the water filter tank 3 is provided with a plurality of water outlet holes 31, and the water outlet holes 31 are located below the partition 2, and the clean water outlet 103 is located above the partition 2.

[0022] Reference Figure 1 The desulfurization reaction tank 100 is made of stainless steel, which has good corrosion resistance and durability. The partition 2 is made of polypropylene, which is light and corrosion-resistant. The microfiltration membrane arranged in the water inlet 21 is made of polyethersulfone (PES), which has good filtering performance and chemical resistance.

[0023] Reference Figure 1 The water filter tank 3 is made of polyethylene material, and the filter material can be selected from quartz sand or activated carbon, both of which can effectively remove large particles of solid impurities in sewage. The water outlet holes 31 are evenly distributed at the bottom of the water filter tank 3 to ensure that the sewage can smoothly enter the space below the partition 2.

[0024] Reference Figure 1 and Figure 2 A filter plate 32 is fixedly installed in the water filter tank 3, and the horizontal height of the filter plate 32 is higher than the clean water outlet 103. The filter material is arranged above the filter plate 32. A plurality of water filter holes are arranged on the filter plate 32. The arrangement of the filter plate 32 makes the filter material always located above the water inlet outlet, thereby improving the service life of the filter material.

[0025] Reference Figure 2 The side wall of the desulfurization reaction tank 100 is provided with a filter material outlet 104 connected to the water filter tank 3, the filter material outlet 104 is arranged above the filter plate 32, the desulfurization reaction tank 100 is provided with a sealing component for closing the filter material outlet 104, the top of the desulfurization reaction tank 100 is provided with a filter material replenishment port 105 connected to the water filter tank 3, and the top of the desulfurization reaction tank 100 is provided with a cover 106 for closing the filter material replenishment port 105; the setting of the filter material outlet 104 allows the filter material to be cleaned or replaced in time when necessary, to prevent the filter material from failing and causing a decrease in the treatment effect; the setting of the filter material replenishment port 105 is convenient for timely replenishing new filter material after the filter material is consumed, to ensure the continuous and efficient operation of the device. Further, the filter plate 32 is arranged to be tilted downward in the direction close to the filter material outlet 104, so as to facilitate the discharge of the filter material from the filter material outlet 104.

[0026] Reference Figure 2The setting of the sealing component effectively prevents the filter material from leaking during normal operation, ensuring the sealing and safety of the device. Specifically, the sealing component includes a blocking cylinder 4 and a limiting member. The blocking cylinder 4 is adapted to the filter material outlet 104 and is slidably arranged in the filter material outlet 104. The blocking cylinder 4 is connected to the filter material outlet 104. An end plate 41 is arranged at the end of the blocking cylinder 4 away from the desulfurization reaction tank 100. A discharge port 42 is provided on the side wall of the blocking cylinder 4. A sealing rubber ring 43 is sleeved on the side wall of the blocking cylinder 4. The limiting member is used to prevent the blocking cylinder 4 from sliding. Specifically, the limiting member includes a limiting screw 107. The limiting screw 107 is rotatably arranged on the side wall of the desulfurization reaction tank 100. A connecting block 44 is fixedly arranged on the side wall of the blocking cylinder 4. The limiting screw 107 is threadedly matched with the connecting block 44. A rotating handle 108 is fixedly arranged on the limiting screw 107.

[0027] Reference Figure 1 and Figure 3 A distribution water pipe 109 is fixedly installed in the desulfurization reaction tank 100 and below the partition 2. The distribution water pipe 109 is arranged along the circumference of the desulfurization reaction tank 100, and a plurality of distribution holes 110 are opened on the side wall of the distribution water pipe 109. The distribution holes 110 are evenly spaced along the circumference of the distribution water pipe 109. A water injection cylinder 5 is fixedly installed in the desulfurization reaction tank 100. The water injection cylinder 5 is vertically arranged and passes through the partition 2. The water injection cylinder 5 is connected to the distribution water pipe 109. A plunger 51 is slidably arranged in the water injection cylinder 5. The desulfurization reaction tank 100 is provided with a first driving member 111 for driving the plunger 51 to slide. The sliding of the plunger 51 can adjust the pressure in the water injection cylinder 5, so that high-pressure water columns are formed at the positions of the distribution holes 110 of the distribution water pipe 109, thereby accelerating the mixing effect of sewage and precipitation agents and improving sewage treatment efficiency.

[0028] Reference Figure 3The plunger 51 is provided with a center hole 511, in which a center column 52 is slidably inserted, a baffle 521 is fixedly provided at the top of the center column 52, a limit ring 522 is sleeved on the center column 52 and located below the plunger 51, a water hole 523 is provided on the side wall of the center column 52, and the first driving member 111 includes a pneumatic cylinder, which is fixedly provided at the top of the desulfurization reaction tank 100, and a piston rod of the pneumatic cylinder extends into the water injection cylinder 5 and is fixedly connected to the baffle 521 at the top of the center column 52, so as to drive the center column 52 to move; when the center column 52 slides up, When the center column 52 slides down, the water hole 523 enters the center hole 511 of the plunger 51, and the water hole 523 is closed to form sufficient water pressure in the water injection barrel 5, so that high-pressure water columns can be formed at the distribution holes 110 of the distribution pipe, thereby ensuring the mixing effect of sewage and sediment.

[0029] Reference Figure 1 A reagent delivery pipe 112 is provided in the desulfurization reaction tank 100, one end of the reagent delivery pipe 112 is connected to the reagent inlet 101, and the other end of the reagent delivery pipe 112 is connected to the water injection cylinder 5, and the connecting end of the reagent delivery pipe 112 and the water injection cylinder 5 is located above the plunger 51. The reagent delivery pipe 112 connects the reagent inlet 101 with the water injection cylinder 5, and cooperates with the design of the plunger 51, so that the precipitated reagent can enter the bottom of the plunger 51 and be evenly injected into the desulfurization reaction tank 100, further improving the mixing effect of the reagent and sewage.

[0030] Reference Figure 1 A sewage outlet 113 is provided at the bottom of the desulfurization reaction tank 100, and a valve 114 is provided at the sewage outlet 113. The sewage outlet 113 is provided to facilitate the regular discharge of sludge and impurities generated during the sewage treatment process, thereby avoiding the large-scale accumulation of sludge and impurities in the desulfurization reaction tank 100, improving the sewage treatment efficiency, simplifying the operation process, and reducing the maintenance cost.

[0031] Reference Figure 1 and Figure 4A pressure plate 6 is provided in the desulfurization reaction tank 100 for sliding in the vertical direction. The pressure plate 6 is provided below the partition 2. Specifically, the pressure plate 6 is made of stainless steel, and its size matches the inner cavity of the desulfurization reaction tank 100 to ensure that the pressure plate 6 can fit tightly against the inner wall of the desulfurization reaction tank 100. The desulfurization reaction tank 100 is provided with a second driving member 115 for driving the pressure plate 6 to slide. The second driving member 115 includes a hydraulic cylinder, which is fixedly provided at the top of the desulfurization reaction tank 100, and the piston rod of the hydraulic cylinder extends into the desulfurization reaction tank 100. A transmission rod 116 is fixedly connected to the piston rod of the hydraulic cylinder. The transmission rod 116 is slidably penetrated in the partition 2 and is fixedly connected to the pressure plate 6.

[0032] Reference Figure 1 and Figure 4 The pressing plate 6 is provided with a material drop opening 61, a sealing plate 62 is hinged at the bottom of the pressing plate 6, and the sealing plate 62 is used to close the material drop opening 61, and an elastic member 63 is provided on the pressing plate 6 for driving the sealing plate 62 to deflect away from the pressing plate 6, and the elastic member 63 is a compression spring, and a receiving groove is provided at the bottom end of the pressing plate 6, one end of the compression spring is fixedly arranged in the receiving groove, and the other end of the compression spring is fixedly connected to the sealing plate 62. Under normal circumstances, the sealing plate 62 at the bottom of the pressing plate 6 is kept in an open state under the action of the elastic member 63, so that the sludge and impurities above the pressing plate 6 enter the space below the pressing plate 6 through the material drop opening 61. When sludge discharge is required, the second driving member 115 drives the pressure plate 6 to slide downward. At this time, the sludge and impurities under the pressure plate 6 form a reverse pressure on the sealing plate 62, causing the sealing plate 62 to deflect toward the pressure plate 6 and close the discharge port 61. Afterwards, as the pressure plate 6 slides, the sludge and impurities under the pressure plate 6 are squeezed, so that the sludge and impurities can be smoothly discharged from the sewage outlet 113, thereby improving the discharge efficiency of the desulfurization reaction tank 100 for sludge and impurities.

[0033] The implementation principle of a marine desulfurization wastewater treatment device in the embodiment of the present application is as follows: a precipitating agent is added to the desulfurization reaction tank 100 through the agent inlet 101, and the wastewater enters the filter tank 3 through the wastewater inlet 102, and is initially filtered through the filter material to remove large particles of solid impurities. The filtered wastewater flows out through the outlet hole 31, enters the space below the partition 2, and mixes with the precipitating agent to form an insoluble precipitate, thereby effectively removing suspended matter and heavy metal ions in the desulfurization wastewater. After that, the wastewater enters the space above the partition 2 through the water inlet 21 on the partition 2. During this process, the microfiltration membrane further intercepts fine particles and suspended matter in the wastewater to ensure that the water quality meets the discharge standard. The purified water is discharged through the clean water outlet 103, achieving efficient desulfurization wastewater treatment. In addition, the marine desulfurization wastewater treatment device has a compact structure and a small footprint, and is suitable for use in the narrow space of a ship.

[0034] The present application also discloses a method for treating marine desulfurization wastewater, comprising the following steps: S1. Adding a precipitation agent into the desulfurization reaction tank 100 through the agent inlet 101; S2, sewage enters the water filter tank 3 through the sewage inlet 102, is initially filtered by the filter material to remove large solid impurities, and the filtered sewage flows out through the water outlet 31 and enters the space below the partition 2; S3, the sewage enters the space below the partition 2, mixes with the precipitation agent, forms an insoluble precipitate, and effectively removes the suspended matter and heavy metal ions in the desulfurization sewage; S4. The sewage after sedimentation treatment enters the space above the partition 2 through the water inlet 21 on the partition 2. During this process, the microfiltration membrane further intercepts fine particles and suspended matter in the sewage to ensure that the water quality meets the discharge standard. The purified water is discharged through the clean water outlet 103.

[0035] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A marine desulfurization wastewater treatment device, characterized in that: The invention comprises a desulfurization reaction tank (100), wherein the desulfurization reaction tank (100) is provided with a reagent inlet (101), a sewage inlet (102) and a clean water outlet (103); a partition (2) is fixedly arranged inside the desulfurization reaction tank (100); a water outlet (21) is opened on the partition (2); a microfiltration membrane is arranged inside the water outlet (21); a water filter tank (3) is fixedly arranged inside the desulfurization reaction tank (100); the water filter tank (3) penetrates the partition (2); the sewage inlet (102) is connected to the water filter tank (3); the water filter tank (3) is filled with filter material; the water filter tank (3) is provided with a plurality of water outlet holes (31), and the water outlet holes (31) are located below the partition (2); and the clean water outlet (103) is located above the partition (2).

2. A marine desulfurization wastewater treatment device according to claim 1, characterized in that: A distribution water pipe (109) is fixedly arranged in the desulfurization reaction tank (100) and below the partition (2). The distribution water pipe (109) is arranged along the circumference of the desulfurization reaction tank (100), and a plurality of distribution holes (110) are opened on the side wall of the distribution water pipe (109). A water injection cylinder (5) is fixedly arranged in the desulfurization reaction tank (100), and the water injection cylinder (5) is connected to the distribution water pipe (109). A plunger (51) is slidably arranged in the water injection cylinder (5), and the desulfurization reaction tank (100) is provided with a first driving member (111) for driving the plunger (51) to slide.

3. A marine desulfurization wastewater treatment device according to claim 2, characterized in that: The plunger (51) is provided with a center hole (511), a center column (52) is slidably inserted into the center hole (511), a baffle (521) is fixedly provided at the top of the center column (52), a limit ring (522) is sleeved on the center column (52) and located below the plunger (51), a water hole (523) is provided on the side wall of the center column (52), and the first driving member (111) is connected to the center column (52) for driving the center column (52) to move.

4. A marine desulfurization wastewater treatment device according to claim 3, characterized in that: A reagent delivery pipe (112) is provided in the desulfurization reaction tank (100), one end of the reagent delivery pipe (112) is connected to the reagent inlet (101), and the other end of the reagent delivery pipe (112) is connected to the water injection cylinder (5).

5. A marine desulfurization wastewater treatment device according to claim 1, characterized in that: A sewage outlet (113) is provided at the bottom of the desulfurization reaction tank (100), and a valve (114) is provided at the sewage outlet (113).

6. A marine desulfurization wastewater treatment device according to claim 5, characterized in that: A pressure plate (6) is provided in the desulfurization reaction tank (100) to slide in the vertical direction. The pressure plate (6) is provided below the partition (2) and is compatible with the desulfurization reaction tank (100). The desulfurization reaction tank (100) is provided with a second driving member (115) for driving the pressure plate (6) to slide. A material drop opening (61) is provided on the pressure plate (6). A sealing plate (62) is hinged at the bottom of the pressure plate (6), and the sealing plate (62) is used to close the material drop opening (61). An elastic member (63) is provided on the pressure plate (6) for driving the sealing plate (62) to deflect away from the pressure plate (6).

7. A marine desulfurization wastewater treatment device according to claim 1, characterized in that: The side wall of the desulfurization reaction tank (100) is provided with a filter material outlet (104) connected to the water filter tank (3), the desulfurization reaction tank (100) is provided with a sealing component for sealing the filter material outlet (104), and the top of the desulfurization reaction tank (100) is provided with a filter material replenishing port (105) connected to the water filter tank (3).

8. A marine desulfurization wastewater treatment device according to claim 7, characterized in that: The sealing assembly comprises a blocking cylinder (4) and a limiting member, wherein the blocking cylinder (4) is slidably arranged in the filter material outlet (104) and is connected to the filter material outlet (104), and the limiting member is used to prevent the blocking cylinder (4) from sliding, and an end plate (41) is provided at the end of the blocking cylinder (4) away from the desulfurization reaction tank (100), and a discharge port (42) is provided on the side wall of the blocking cylinder (4).

9. A marine desulfurization wastewater treatment device according to claim 7, characterized in that: A filter plate (32) is fixedly arranged in the water filter tank (3), and the horizontal height of the filter plate (32) is higher than the clean water outlet (103), the filter material is arranged above the filter plate (32), a plurality of water filter holes are arranged on the filter plate (32), the filter material outlet (104) is arranged above the filter plate (32), and the filter plate (32) is arranged to be inclined downward in a direction close to the filter material outlet (104).

10. A method for treating marine desulfurization wastewater, applied to the marine desulfurization wastewater treatment device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1, adding a precipitation agent into the desulfurization reaction tank (100) through the agent inlet (101); S2, sewage enters the water filter tank (3) through the sewage inlet (102), is initially filtered by the filter material to remove large solid impurities, and the filtered sewage flows out through the water outlet (31) and enters the space below the partition (2); S3, the sewage enters the space below the partition (2), mixes with the precipitation agent, forms an insoluble precipitate, and effectively removes the suspended matter and heavy metal ions in the desulfurization sewage; S4. The sewage after sedimentation treatment enters the space above the partition (2) through the water inlet (21) on the partition (2). During this process, the microfiltration membrane further intercepts fine particles and suspended matter in the sewage to ensure that the water quality meets the discharge standard. The purified water is discharged through the clean water outlet (103).

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