A marine desulfurization sewage treatment device and method

Abstract

The present application discloses a marine desulfurized sewage treatment device and method, which relates to the technical field of sewage treatment. It includes a desulfurization reaction tank, and the desulfurization reaction tank is provided with a chemical agent inlet, a sewage inlet and a purified water outlet. A partition is fixedly arranged in the desulfurization reaction tank, and a water passing port is opened on the partition. A microfiltration membrane is arranged in the water passing port. A water filtering tank is fixedly arranged in the desulfurization reaction tank, and the water filtering tank penetrates through the partition. The sewage inlet is communicated with the water filtering tank. The water filtering tank is filled with filter materials, and the water filtering tank is provided with a plurality of water outlet holes, and the water outlet holes are located below the partition, and the purified water outlet is located above the partition. The marine desulfurized sewage treatment device of the present application has a compact structure and a small floor area, is suitable for use in the narrow space of a ship, and at the same time has a high treatment efficiency and a good purification effect, ensuring that the treated water quality meets strict discharge standards.

Description

Technical Field

[0001] This 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 protection awareness and the increasingly strict sulfur oxide emission standards of the International Maritime Organization (IMO), the shipping industry is facing huge emission reduction pressure. For this reason, many shipping companies have begun to install waste gas cleaning equipment such as desulfurization towers on their ships to remove sulfur dioxide in the exhaust gas through seawater washing. This technology not only helps to reduce air pollution but also meets the requirements of international environmental protection regulations and promotes sustainable development. However, this process will generate a large amount of sewage containing heavy metal ions, suspended solids and other harmful substances. How to effectively treat this sewage has become a major challenge in the industry.

[0003] Currently, the method for treating ship desulfurization wastewater mainly adopts the physical precipitation method. Specifically, large particle solid impurities in the sewage are removed through physical filtration. Then, specific agents are added to the wastewater to promote the formation of insoluble precipitates of pollutants for separation. Finally, the residual trace pollutants in the water are removed through a microfiltration membrane system. Although the existing physical precipitation method can achieve the treatment of desulfurization sewage to a certain extent, the existing physical precipitation method requires a large amount of equipment and has 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, this application provides a marine desulfurization sewage treatment device and method.

[0005] In a first aspect, a marine desulfurization sewage treatment device provided by this application adopts the following technical solution:

[0006] A marine desulfurization sewage treatment device includes a desulfurization reaction tank, the desulfurization reaction tank is provided with a chemical agent inlet, a sewage inlet and a purified water outlet. A partition is fixedly arranged in the desulfurization reaction tank, a water passing port is opened on the partition, a microfiltration membrane is arranged in the water passing port. A water filtering tank is fixedly arranged in the desulfurization reaction tank, the water filtering tank penetrates through the partition, the sewage inlet is communicated with the water filtering tank, the water filtering tank is filled with filter materials, the water filtering tank is provided with a plurality of water outlet holes, and the water outlet holes are located below the partition, and the purified water outlet is located above the partition.

[0007] Optionally, a distribution water pipe is fixedly arranged below the partition plate in the desulfurization reaction tank. The distribution water pipe is arranged along the circumferential direction of the desulfurization reaction tank, and a plurality of distribution holes are formed in the side wall of the distribution water pipe. An injection water cylinder is fixedly arranged in the desulfurization reaction tank. The injection water cylinder is communicated with the distribution water pipe. A plunger is slidably arranged in the injection water cylinder. The desulfurization reaction tank is provided with a first driving member for driving the plunger to slide.

[0008] Optionally, a central hole is formed in the plunger. A central cylinder is slidably inserted through the central hole. A baffle is fixedly arranged at the top end of the central cylinder. A limiting ring is sleeved on the central cylinder below the plunger. Water passing holes are formed in the side wall of the central cylinder. The first driving member is connected to the central cylinder for driving the central cylinder to move.

[0009] Optionally, a chemical agent conveying pipe is arranged in the desulfurization reaction tank. One end of the chemical agent conveying pipe is communicated with the chemical agent inlet, and the other end of the chemical agent conveying pipe is communicated with the injection water cylinder.

[0010] Optionally, a sewage discharge port is arranged at the bottom of the desulfurization reaction tank, and a valve is arranged at the sewage discharge port.

[0011] Optionally, a pressing plate is slidably arranged in the desulfurization reaction tank in the vertical direction. The pressing plate is arranged below the partition plate and is adapted to the desulfurization reaction tank. The desulfurization reaction tank is provided with a second driving member for driving the pressing plate to slide. A material dropping port is formed in the pressing plate. A sealing plate is hinged to the bottom of the pressing plate, and the sealing plate is used for closing the material dropping port. An elastic member for driving the sealing plate to deflect away from the pressing plate is arranged on the pressing plate.

[0012] Optionally, a filter material outlet communicated with the water filtering tank is formed in the side wall of the desulfurization reaction tank. The desulfurization reaction tank is provided with a sealing assembly for closing the filter material outlet. A filter material supplement port communicated with the water filtering tank is formed at the top end of the desulfurization reaction tank.

[0013] Optionally, the sealing assembly includes a blocking cylinder and a limiting member. The blocking cylinder is slidably inserted through the filter material outlet and is communicated with the filter material outlet. The limiting member is used for preventing the blocking cylinder from sliding. An end plate is arranged at the end of the blocking cylinder away from the desulfurization reaction tank. A material discharging port is formed in the side wall of the blocking cylinder.

[0014] Optionally, a filter plate is fixedly arranged in the water filtering tank, and the horizontal height of the filter plate is higher than the purified water outlet. The filter material is arranged above the filter plate. A plurality of water filtering holes are formed in the filter plate. The filter material outlet is arranged above the filter plate, and the filter plate is arranged to incline downward along the direction close to the filter material outlet.

[0015] In a second aspect, the present application provides a method for treating shipboard desulfurized sewage, adopting the following technical solution:

[0016] A method for treating marine desulfurized sewage, comprising the following steps:

[0017] S1. Add a precipitation agent into the desulfurization reaction tank through the agent inlet;

[0018] S2. The sewage enters the water filtration tank through the sewage inlet, is preliminarily filtered by the filter material to remove large particle solid impurities, and the filtered sewage flows out through the water outlet hole and enters the space below the partition board;

[0019] S3. The sewage enters the space below the partition board and is mixed with the precipitation agent to form insoluble precipitates, effectively removing suspended solids and heavy metal ions in the desulfurized sewage;

[0020] S4. The sewage after precipitation treatment enters the space above the partition board through the water passing hole on the partition board. During this process, the microfiltration membrane further intercepts fine particles and suspended solids in the sewage to ensure that the water quality meets the discharge standard, and the purified water is discharged through the purified water outlet.

[0021] In summary, the present application includes at least one of the following beneficial technical effects:

[0022] 1. The structure of the marine desulfurized sewage treatment device of the present application is compact, occupies a small area, is suitable for use in the narrow space of a ship, and at the same time has a high treatment efficiency and good purification effect, can effectively remove suspended solids and heavy metal ions in the desulfurized sewage, and ensures that the treated water quality meets strict discharge standards; specifically, a precipitation agent is added into the desulfurization reaction tank through the agent inlet, the sewage enters the water filtration tank through the sewage inlet, is preliminarily filtered by the filter material to remove large particle solid impurities. The filtered sewage flows out through the water outlet hole and enters the space below the partition board, and is mixed with the precipitation agent to form insoluble precipitates, thereby effectively removing suspended solids and heavy metal ions in the desulfurized sewage. Then, the sewage enters the space above the partition board through the water passing hole on the partition board. During this process, the microfiltration membrane further intercepts fine particles and suspended solids in the sewage to ensure that the water quality meets the discharge standard. The purified water is discharged through the purified water outlet, realizing efficient desulfurized sewage treatment.

[0023] 2. By arranging a distribution water pipe in the desulfurization reaction tank and below the partition board, and through the sliding of the plunger, the pressure in the water injection cylinder can be adjusted to form high-pressure water columns at the positions of the distribution holes of the distribution water pipe, thereby accelerating the mixing effect of the sewage and the precipitation agent and improving the sewage treatment efficiency.

[0024] 3. By providing a sewage outlet at the bottom of the desulfurization reaction tank and installing a valve at the sewage outlet, sludge and impurities generated during the sewage treatment process can be effectively discharged by regularly opening the sewage outlet, avoiding the large accumulation of sludge and impurities in the desulfurization reaction tank, improving the sewage treatment efficiency, simplifying the operation process, and reducing the maintenance cost. Description of the Drawings

[0025] Figure 1 is the overall structural cross-sectional view of the embodiment of the present application;

[0026] Figure 2 is the structural schematic diagram of the water filtration tank used in the embodiment of the present application;

[0027] Figure 3 is the structural schematic diagram of the plunger used in the embodiment of the present application;

[0028] Figure 4 is the structural schematic diagram of the pressing plate used in the embodiment of the present application.

[0029] Description of the Reference Numerals: 100, desulfurization reaction tank; 101, chemical agent inlet; 102, sewage inlet; 103, purified water outlet; 104, filter media outlet; 105, filter media replenishment port; 106, cover; 107, limit screw; 108, turning handle; 109, distribution water pipe; 110, distribution holes; 111, first driving member; 112, chemical agent delivery pipe; 113, sewage outlet; 114, valve; 115, second driving member; 116, transmission rod; 2, partition; 21, water passing port; 3, water filtration tank; 31, water outlet holes; 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, central hole; 52, central cylindrical column; 521, baffle; 522, limiting ring; 523, water passing holes; 6, pressing plate; 61, material dropping port; 62, sealing plate; 63, elastic member. Detailed Embodiments

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the attached Figure 1 - attached Figure 4 , and the described embodiments are only possible technical implementations of the present invention, not all possible implementations. Those skilled in the art can fully combine the embodiments of the present invention to obtain other embodiments without creative labor, and these embodiments are also within the protection scope of the present invention.

[0031] The inventors of the present application found that the existing physical sedimentation method for treating desulfurization sewage requires a large amount of equipment and has a high space occupancy rate, which is not conducive to the application on ships. For this reason, the present application discloses a marine desulfurization sewage treatment device, mainly adopting the following solutions:

[0032] This embodiment of the present application discloses a marine desulfurized sewage treatment device. Refer to Figure 1 , which includes a desulfurization reaction tank 100. The desulfurization reaction tank 100 is provided with a chemical agent inlet 101, a sewage inlet 102, and a purified water outlet 103. A partition plate 2 is fixedly arranged in the desulfurization reaction tank 100. A water passing port 21 is opened on the partition plate 2, and a microfiltration membrane 22 is arranged in the water passing port 21. A water filtering tank 3 is fixedly arranged in the desulfurization reaction tank 100. The water filtering tank 3 penetrates through the partition plate 2. The sewage inlet 102 is communicated with the water filtering tank 3. The water filtering tank 3 is filled with filter media. The water filtering tank 3 is provided with a plurality of water outlet holes 31, and the water outlet holes 31 are located below the partition plate 2. The purified water outlet 103 is located above the partition plate 2.

[0033] Refer to Figure 1 , the desulfurization reaction tank 100 is made of stainless steel material, having good corrosion resistance and durability. The partition plate 2 is made of polypropylene material, being light and corrosion-resistant. The microfiltration membrane arranged in the water passing port 21 is made of polyethersulfone (PES) material, having good filtration performance and chemical resistance.

[0034] Refer to Figure 1 , the water filtering tank 3 is made of polyethylene material. The filter media can be selected from quartz sand or activated carbon, and both of these filter media can effectively remove large particle solid impurities in the sewage. The water outlet holes 31 are uniformly distributed at the lower part of the water filtering tank 3, ensuring that the sewage can smoothly enter the space below the partition plate 2.

[0035] Refer to Figure 1 and Figure 2 , a filter plate 32 is fixedly arranged in the water filtering tank 3, and the horizontal height of the filter plate 32 is higher than that of the purified water outlet 103. The filter media is arranged above the filter plate 32. A plurality of water filtering holes are arranged on the filter plate 32. The arrangement of the filter plate 32 enables the filter media to always be located above the water inlet and outlet, improving the service life of the filter media.

[0036] Refer to Figure 2 , a filter media outlet 104 communicated with the water filtering tank 3 is opened on the side wall of the desulfurization reaction tank 100. The filter media outlet 104 is arranged above the filter plate 32. The desulfurization reaction tank 100 is provided with a sealing assembly for closing the filter media outlet 104. A filter media replenishing port 105 communicated with the water filtering tank 3 is opened at the top end of the desulfurization reaction tank 100. A cover 106 for closing the filter media replenishing port 105 is arranged at the top of the desulfurization reaction tank 100; the arrangement of the filter media outlet 104 enables the filter media to be cleaned or replaced in time when needed, preventing the decline of the treatment effect caused by the failure of the filter media; the arrangement of the filter media replenishing port 105 facilitates the timely replenishment of new filter media after the consumption of the filter media, ensuring the continuous and efficient operation of the device. Further, the filter plate 32 is arranged to incline downward along the direction close to the filter media outlet 104, facilitating the discharge of the filter media from the filter media outlet 104.

[0037] Reference Figure 2 , the setting of the sealing component effectively prevents the leakage of the filter material 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 slidably penetrates into the filter material outlet 104. The blocking cylinder 4 is in communication with the filter material outlet 104. An end plate 41 is provided at the end of the blocking cylinder 4 away from the desulfurization reaction tank 100. A discharge port 42 is formed in the side wall of the blocking cylinder 4, and 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 which 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, and the limiting screw 107 is in threaded cooperation with the connecting block 44. A turning handle 108 is fixedly arranged on the limiting screw 107.

[0038] Reference Figure 1 and Figure 3 , a distribution water pipe 109 is fixedly arranged in the desulfurization reaction tank 100 and below the partition plate 2. The distribution water pipe 109 is arranged along the circumferential direction of the desulfurization reaction tank 100, and a plurality of distribution holes 110 are formed in the side wall of the distribution water pipe 109. The distribution holes 110 are equidistantly distributed along the circumferential direction of the distribution water pipe 109. An injection water cylinder 5 is fixedly arranged in the desulfurization reaction tank 100. The injection water cylinder 5 is arranged vertically and penetrates through the partition plate 2. The injection water cylinder 5 is in communication with the distribution water pipe 109. A plunger 51 is slidably arranged in the injection water 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 injection water cylinder 5, so that high-pressure water columns are formed at the positions of the distribution holes 110 of the distribution water pipe 109, accelerating the mixing effect of the sewage and the precipitation agent and improving the sewage treatment efficiency.

[0039] Reference Figure 3, the plunger 51 is provided with a central hole 511, a central cylinder 52 is slidably inserted into the central hole 511, a baffle 521 is fixedly arranged at the top end of the central cylinder 52, a limiting ring 522 is sleeved on the central cylinder 52 and located below the plunger 51, a water passing hole 523 is formed in the side wall of the central cylinder 52, the first driving member 111 includes a pneumatic cylinder, the pneumatic cylinder is fixedly arranged at the top end of the desulfurization reaction tank 100, and the piston rod of the pneumatic cylinder extends into the water injection cylinder 5 and is fixedly connected with the baffle 521 at the top end of the central cylinder 52 for driving the central cylinder 52 to move; when the central cylinder 52 slides upward, the water passing hole 523 is first opened, and then the plunger 51 is driven to slide upward, so as to avoid excessive pressure in the water injection cylinder 5, resulting in a large suction force at the positions of the distribution holes 110 of the distribution pipe, causing a large amount of sewage and sediment to backflow into the distribution water pipe 109, resulting in blockage of the distribution water pipe 109. When the central cylinder 52 slides downward, the water passing hole 523 enters the central hole 511 of the plunger 51 to close the water passing hole 523, so as to form sufficient water pressure in the water injection cylinder 5, enabling high-pressure water columns to be formed at the positions of the distribution holes 110 of the distribution water pipe 109, ensuring the mixing effect of sewage and precipitation agent.

[0040] Refer to Figure 1 , a chemical agent delivery pipe 112 is arranged in the desulfurization reaction tank 100. One end of the chemical agent delivery pipe 112 is communicated with the chemical agent inlet 101, the other end of the chemical agent delivery pipe 112 is communicated with the water injection cylinder 5, and the communicating end of the chemical agent delivery pipe 112 and the water injection cylinder 5 is located above the plunger 51. The chemical agent delivery pipe 112 communicates the chemical agent inlet 101 with the water injection cylinder 5. Cooperating with the design of the plunger 51, the precipitation agent can enter below the plunger 51 and be evenly injected into the interior of the desulfurization reaction tank 100, further improving the mixing effect of the chemical agent and sewage.

[0041] Refer to Figure 1 , a sewage discharge port 113 is arranged at the bottom of the desulfurization reaction tank 100, and a valve 114 is arranged at the sewage discharge port 113. Through the arrangement of the sewage discharge port 113, it is convenient to regularly discharge the sludge and impurities generated during the sewage treatment process, avoiding the large accumulation of sludge and impurities in the desulfurization reaction tank 100, improving the sewage treatment efficiency, simplifying the operation process at the same time, and reducing the maintenance cost.

[0042] Refer to Figure 1 and Figure 4, a pressing plate 6 is slidably arranged vertically inside the desulfurization reaction tank 100. The pressing plate 6 is arranged below the partition plate 2. Specifically, the pressing plate 6 is made of stainless steel and has a size matching the inner cavity of the desulfurization reaction tank 100 to ensure that the pressing plate 6 can closely fit 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 pressing plate 6 to slide. The second driving member 115 includes a hydraulic cylinder. The hydraulic cylinder is fixedly arranged 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 slidably penetrates through the partition plate 2 and is fixedly connected to the pressing plate 6.

[0043] Refer to Figure 1 and Figure 4 , a material dropping port 61 is formed on the pressing plate 6. A sealing plate 62 is hinged to the bottom of the pressing plate 6, and the sealing plate 62 is used to close the material dropping port 61. An elastic member 63 for driving the sealing plate 62 to deflect away from the pressing plate 6 is arranged on the pressing plate 6. The elastic member 63 is a compression spring. A receiving groove is formed 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 remains open 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 dropping port 61. When sludge discharge is required, the second driving member 115 drives the pressing plate 6 to slide downward. At this time, the sludge and impurities below the pressing plate 6 form a reverse pressure on the sealing plate 62, causing the sealing plate 62 to deflect towards the pressing plate 6 and close the material dropping port 61. Then, as the pressing plate 6 slides, the sludge and impurities below the pressing plate 6 are squeezed, enabling the sludge and impurities to be smoothly discharged from the sewage discharge port 113, improving the discharge efficiency of the sludge and impurities in the desulfurization reaction tank 100.

[0044] The implementation principle of a marine desulfurized sewage treatment device according to an embodiment of the present application is as follows: A precipitation agent is added into the desulfurization reaction tank 100 through the chemical agent inlet 101. Sewage enters the water filtration tank 3 through the sewage inlet 102 and is preliminarily filtered by filter media to remove large particle solid impurities. The filtered sewage flows out through the water outlet holes 31 and enters the space below the partition plate 2, where it is mixed with the precipitation agent to form insoluble precipitates, thereby effectively removing suspended solids and heavy metal ions in the desulfurized sewage. Then, the sewage enters the space above the partition plate 2 through the water passing holes 21 on the partition plate 2. During this process, the microfiltration membrane further intercepts fine particles and suspended solids in the sewage to ensure that the water quality meets the discharge standard. The purified water is discharged through the purified water outlet 103, achieving efficient desulfurized sewage treatment. Moreover, the marine desulfurized sewage treatment device has a compact structure and a small floor area, being suitable for use in the narrow space of a ship.

[0045] An embodiment of the present application also discloses a marine desulfurized sewage treatment method, including the following steps:

[0046] S1. Add a precipitation agent into the desulfurization reaction tank 100 through the chemical agent inlet 101;

[0047] S2. Sewage enters the water filtration tank 3 through the sewage inlet 102, is preliminarily filtered by the filter material to remove large particle solid impurities, and the filtered sewage flows out through the water outlet hole 31 and enters the space below the partition plate 2;

[0048] S3. The sewage enters the space below the partition plate 2, mixes with the precipitation agent to form insoluble precipitates, effectively removing suspended solids and heavy metal ions in the desulfurized sewage;

[0049] S4. The sewage after precipitation treatment enters the space above the partition plate 2 through the water passing port 21 on the partition plate 2. During this process, the microfiltration membrane further intercepts fine particles and suspended solids in the sewage to ensure that the water quality meets the discharge standard, and the purified water is discharged through the purified water outlet 103.

[0050] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within 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 in the desulfurization reaction tank (100); a water outlet (21) is opened on the partition (2); a microfiltration membrane is arranged in the water outlet (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 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); 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); 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; The plunger (51) is provided with a central hole (511), a central column (52) is slidably inserted into the central hole (511), a baffle (521) is fixedly provided at the top of the central column (52), a limiting ring (522) is sleeved on the central column (52) and located below the plunger (51), a water hole (523) is provided on the side wall of the central column (52), and the first driving member (111) is connected to the central column (52) and is used to drive the central column (52) to move; 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).

2. 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).

3. A marine desulfurization wastewater treatment device according to claim 2, 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).

4. 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).

5. A marine desulfurization wastewater treatment device according to claim 4, 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).

6. A marine desulfurization wastewater treatment device according to claim 4, 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).

7. A method for treating marine desulfurization wastewater, applied to the marine desulfurization wastewater treatment device according to any one of claims 1 to 6, 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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