Marine sewage treatment device

Abstract

The invention discloses a marine sewage treater, which belongs to the technical field of marine sewage treatment.The marine sewage treater comprises a tank body, the tank body is provided with a sewage inlet, a purified water outlet and an oil stain outlet, a drainage pipeline and a mixing cylinder are arranged in the tank body, and the top end of the drainage pipeline is communicated with the sewage inlet; the bottom end of the sewage inlet is connected with the mixing cylinder through a dosing device, a partition plate is fixedly arranged in the tank body, the drainage pipeline and the mixing cylinder both penetrate through the partition plate, the partition plate is of a net surface structure, a filler layer is arranged in the tank body and located above the partition plate, and the purified water outlet is communicated with the space below the partition plate. And the oil stain outlet is formed in a position close to the top of the tank body. According to the invention, oil stains and other suspended impurities in the flue gas washing water are efficiently and reliably cleaned, and the treated water quality is ensured to meet the emission standard, so that the marine environment is protected.

Description

Technical Field

[0001] This invention relates to the technical field of ship sewage treatment, specifically a ship sewage processor. Background Technology

[0002] In accordance with the "Law of the People's Republic of China on the Prevention and Control of Atmospheric Pollution" and relevant international conventions to which my country is a party, the Maritime Safety Administration of the Ministry of Transport, based on the "Implementation Plan for Ship Emission Control Zones in the Pearl River Delta, Yangtze River Delta, and Bohai Rim (Beijing-Tianjin-Hebei) Waters" (Jiaohaifa

[2015] No. 177), formulated an implementation plan for ship air pollutant emission control zones, placing enormous pressure on the shipping industry to reduce emissions. To address this, many shipping companies have begun installing flue gas scrubbing equipment on their ships to remove sulfur oxides from exhaust gases through seawater washing. This technology not only helps reduce air pollution but also meets international environmental regulations, promoting sustainable development. However, this process generates large amounts of oily wastewater, which requires treatment to meet emission standards; otherwise, it will cause serious damage to the marine environment.

[0003] Currently, various methods are commonly used in the industry to address the treatment of oily wastewater from ships. Common methods include physical separation and chemical treatment. Specifically, physical separation methods mainly include gravity sedimentation and filtration; chemical treatment methods primarily achieve oil-water separation by adding flocculants, demulsifiers, and other chemical agents. However, while these methods have solved the problem of treating oily wastewater from ships to some extent, they still have some shortcomings. For example, traditional physical separation methods are difficult to efficiently remove fine oil droplets, resulting in substandard water quality after treatment; while chemical treatment methods can effectively separate oil and water, a large amount of suspended solids will still remain in the water, and direct discharge may cause secondary pollution. Therefore, how to efficiently and reliably treat oily wastewater from ships to meet strict discharge standards has become an urgent technical challenge. Summary of the Invention

[0004] The present invention addresses the problem that existing technical solutions are too simplistic and provides a solution that is significantly different from existing technologies. Specifically, the present invention mainly provides a marine sewage treatment plant to solve the technical problems mentioned in the background.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: A marine sewage treatment unit includes a tank with a sewage inlet, a clean water outlet, and an oil sludge outlet. A drainage pipe and a mixing cylinder are installed inside the tank. The top end of the drainage pipe is connected to the sewage inlet, and the bottom end of the sewage inlet is connected to the mixing cylinder via a dosing device. A baffle is fixedly installed inside the tank, and both the drainage pipe and the mixing cylinder penetrate the baffle. The baffle has a mesh structure. A packing layer is installed inside the tank and above the baffle. The clean water outlet is connected to the space below the baffle, and the oil sludge outlet is located near the top of the tank. The mixing cylinder is equipped with a diversion pipe and a transfer box at its upper and lower ends, respectively. Several mixing boxes are arranged between the diversion pipe and the transfer box. The diversion pipe, the transfer box and the several mixing boxes are all connected by a connecting hose. Each mixing box is equipped with a vibrator. The vibration frequency of the several vibrators increases sequentially from top to bottom. Each of the mixing chambers is equipped with a drive box, on which a rotating ring is rotatably mounted. Several evenly distributed mixing blades are provided on the outer side of the rotating ring, and the rotation speed of the rotating rings increases sequentially from top to bottom.

[0006] Preferably, the dosing device includes a docking pipe and a dosing tank. One end of the docking pipe is connected to a drainage pipe, and the other end is connected to the transfer box of the mixing cylinder. The dosing tank is located above the docking pipe, and a dosing outlet pipe is connected between the dosing tank and the docking pipe.

[0007] Preferably, a follower shaft is rotatably mounted on the docking pipe, and a rotating paddle located inside the docking pipe is connected to the axis of the follower shaft. A rotating shaft is rotatably mounted inside the drug outlet pipe, and an auger is mounted on the rotating shaft. The follower shaft and the rotating shaft are connected by two meshing bevel gears.

[0008] Preferably, the mixing cylinder is installed inside the tank by an external support, and several mixing boxes are installed inside the mixing cylinder by shock-absorbing supports. A vertical rod is also installed inside the mixing cylinder, the vertical rod passing through several mixing boxes and connecting hoses, and the drive box is installed on the vertical rod.

[0009] Preferably, each drive box has a transmission shaft and a drive shaft rotatably mounted at both the upper and lower ends, and the transmission shaft and drive shaft are connected by a connecting rod. Each transmission shaft is equipped with a speed reduction component. A drive motor is provided at the lower end of the tank, and the output end of the drive motor is connected to the lowest drive shaft through a connecting rod.

[0010] Preferably, the speed reduction assembly consists of a shaft, gears of different sizes that mesh with each other, and a chain and sprocket.

[0011] Preferably, a plurality of rotating blocks are rotatably mounted on the outer side of the rotating ring, the mixing blades are mounted on the rotating blocks, a meshing rack and pinion is provided inside the rotating ring, and the rotating blocks are connected to the gear shaft of the rack and pinion. A slidingly mounted lifting ring and a gear ring are provided inside the rotating ring, the lifting ring is connected to the rack of the rack and pinion, and a power gear mounted on the drive shaft is provided inside the drive box, the power gear driving the gear ring to rotate.

[0012] Preferably, a pressure plate is slidably installed inside the drive box, a rotating disk is installed on the connecting rod, and a number of sliding frames are provided on the rotating disk in a circularly equidistant arrangement around the connecting rod. Each sliding frame has a trapezoidal arc plate sliding on it, and a compression spring is provided on one side of the trapezoidal arc plate. One end of the pressure plate is in contact with the inclined surface of the trapezoidal arc plate, and the other end is connected to the lifting ring.

[0013] Preferably, the top of the diversion pipe is connected to an integrated external cavity, and a gas distributor is provided inside the external cavity. The tank is equipped with an air pump that supplies gas to the gas distributor.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) After the sewage enters from the sewage inlet, it goes through the diversion pipe and the dosing device to the mixing cylinder. As the sewage in the mixing cylinder increases, the sewage enters the tank through the mixing cylinder. The oil sludge accumulates at the top of the tank and is eventually discharged through the oil sludge outlet. The water after oil-water separation is filtered through the packing material below and discharged through the clean water outlet. This achieves efficient and reliable cleaning of oil sludge and other suspended impurities in the flue gas washing water, ensuring that the treated water quality meets the discharge standards, thereby protecting the marine environment.

[0015] (2) Wastewater enters from the wastewater inlet and enters the docking pipe through the diversion pipe. The water flow will drive the rotating blade to rotate, so that the follower shaft follows the rotating blade to rotate. The rotating shaft rotates with the rotation of the follower shaft to add the agent to the docking pipe. The dosing device can increase the amount of agent added as the water flow rate increases to avoid insufficient or excessive agent.

[0016] (3) When the sewage is at the bottom of the mixing box, the agent is just coming into contact with the sewage. Therefore, a slightly stronger vibration is used to promote the collision and aggregation between suspended particles. As the sewage rises, the longer the agent is in contact with the sewage, the vibration is continuously reduced to avoid the vibration affecting the aggregation of suspended particles. This greatly promotes the aggregation of suspended matter, allowing the aggregates to float on the water surface, increasing work efficiency and improving the sewage treatment effect. In addition, the vibration intensity can be freely changed according to the sewage inflow speed. The faster the sewage inflow speed, the shorter the sewage stays in the mixing box. Increasing the vibration intensity can effectively promote the mixing of the agent and the sewage.

[0017] (4) As the sewage inside the tank increases, if the upper and lower mixing blades speed up simultaneously, the mixing blades at the top will easily break up the agglomerates. Therefore, by using the speed reduction component, the rotation speed of the rotating ring increases from top to bottom, that is, the rotation speed of the mixing blades decreases from bottom to top, so as to avoid breaking up the agglomerates while ensuring the mixing efficiency.

[0018] (5) The rotating disk follows the connecting rod to rotate. Since the trapezoidal arc plate rotates around the connecting rod on the sliding frame, under the action of centrifugal force, the trapezoidal arc plate slides on the sliding frame. Since the lower end of the pressure arc plate is in contact with the inclined surface of the trapezoidal arc plate, the pressure arc plate will be continuously pushed up. The pressure arc plate drives the lifting ring to move. The lifting ring causes the rotating block to rotate through the rack and pinion gear, thereby causing the mixing blade to rotate. This processor can deflect the angle of the mixing blade when the rotation speed of the mixing blade is too fast, so as to avoid direct impact on the agglomerates and cause the agglomerates to disperse. When the rotation speed of the mixing blade is slow, the mixing blade is vertical, providing a higher turbulence effect.

[0019] (6) The gas distributor evenly releases gas into the wastewater, thereby forming a large number of tiny bubbles in the wastewater. These bubbles can adhere to the surface of oil droplets and suspended particles in the wastewater, increasing their buoyancy and further promoting the oil-water separation effect. At the same time, the rising movement of the bubbles can also play a stirring role, which helps to fully mix the flocculant with the wastewater and improve the treatment efficiency.

[0020] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the tank structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the tank body of the present invention; Figure 3 This is a schematic diagram of the hybrid cylindrical structure of the present invention; Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle; Figure 5 This is a schematic diagram of the drive box structure of the present invention; Figure 6 This is a top view of the rotating disk structure of the present invention; Figure 7 This is a schematic diagram of the dosing device of the present invention. Attached image description: 10. Tank body; 101. Wastewater inlet; 102. Clean water outlet; 103. Oil outlet; 104. Baffle; 105. Packing layer; 106. Drive motor; 20. Dosing device; 201. Drainage pipe; 202. Connecting pipe; 203. Follower shaft; 204. Rotary paddle; 205. Dosing tank; 206. Discharge pipe; 207. Rotating shaft 30. Mixing cylinder; 301. Transfer box; 302. Mixing box; 303. Connecting hose; 304. Vibrator; 305. Vertical rod; 306. Diverter pipe; 40. Drive box; 401. Rotating ring; 402. Mixing vane; 403. Drive shaft; 404. Drive shaft; 405. Connecting rod; 406. Speed ​​reduction assembly; 407. Power gear; 408. Rotary disk; 409. Sliding frame; 410. Trapezoidal plate; 411. Compression spring; 412. Compression plate; 413. Rotating block; 414. Rack and pinion; 415. Lifting ring; 50. Air pump; 501. Gas distributor. Detailed Implementation

[0023] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be given below with reference to the accompanying drawings, which illustrate several embodiments of the present invention. However, the present invention can be implemented in different forms and is not limited to the embodiments described in the text. Rather, these embodiments are provided to make the disclosure of the present invention more thorough and complete.

[0024] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intermediate element present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intermediate element present. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly associated with those skilled in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0026] Example 1: Please refer carefully to the attached diagram. Figure 1 and Figure 2As shown, a marine sewage treatment device includes a tank 10, which has a sewage inlet 101, a clean water outlet 102, and an oil outlet 103. A diversion pipe 201 and a mixing cylinder 30 are installed inside the tank 10. The top end of the diversion pipe 201 is connected to the sewage inlet 101, and the bottom end of the sewage inlet 101 is connected to the mixing cylinder 30 via a dosing device 20. A baffle 104 is fixedly installed inside the tank 10, and both the diversion pipe 201 and the mixing cylinder 30 pass through the baffle 104. The baffle 104 has a mesh structure. A packing layer 105 is installed inside the tank 10 and above the baffle 104. The clean water outlet 102 is connected to the space below the baffle 104. The oil outlet 103 is located near the top of the tank 10. The tank 10 can be made of stainless steel, which is highly corrosion-resistant. The packing layer 105 is a porous medium used to filter sediment in the water; commonly used packing materials include quartz sand and activated carbon. Wastewater enters through the wastewater inlet 101, then flows through the diversion pipe 201 and the dosing device 20 into the mixing column 30. As the wastewater in the mixing column 30 increases, it passes through the mixing column 30 and enters the tank 10. Oil accumulates at the top of the tank 10 and is eventually discharged through the oil outlet 103. The water after oil-water separation is filtered through the packing material below and discharged through the clean water outlet 102. This process achieves efficient and reliable cleaning of oil and other suspended impurities in the flue gas scrubbing water, ensuring that the treated water meets discharge standards and thus protecting the marine environment.

[0027] Example 2: Based on Embodiment 1, please refer carefully to the accompanying drawings. Figure 2 and Figure 7 As shown, the dosing device 20 includes a docking pipe 202 and a dosing tank 205. One end of the docking pipe 202 is connected to the drainage pipe 201, and the other end is connected to the transfer box 301 of the mixing cylinder 30. The dosing tank 205 is located above the docking pipe 202, and a dosing outlet pipe 206 is connected between the dosing tank 205 and the docking pipe 202. A follower shaft 203 is rotatably mounted on the docking pipe 202. A rotating paddle 204 located inside the docking pipe 202 is axially connected to the follower shaft 203. A rotating shaft 207 is rotatably mounted inside the dosing outlet pipe 206. An auger is mounted on the rotating shaft 207. The follower shaft 203 and the rotating shaft 207 are connected by two meshing bevel gears.

[0028] The dosing tank 205 contains flocculant, such as polyacrylamide or polyaluminum chloride, which have good flocculation effects. Wastewater enters through the wastewater inlet 101 and flows through the diversion pipe 201 into the connecting pipe 202. The water flow drives the rotating paddle 204 to rotate, causing the follower shaft 203 to rotate along with the paddle 204. This causes the rotating shaft 207 to rotate along with the follower shaft 203, adding the flocculant to the connecting pipe 202. The dosing device 20 can increase the amount of flocculant added as the water flow rate increases, avoiding insufficient or excessive flocculant.

[0029] Example 3: Based on Example 2, please refer carefully to the accompanying drawings. Figure 1 - Figure 3 As shown, the mixing cylinder 30 has a diversion pipe 306 and a transfer box 301 at its upper and lower ends, respectively. Several mixing boxes 302 are arranged between the diversion pipe 306 and the transfer box 301. The diversion pipe 306, the transfer box 301 and the several mixing boxes 302 are all connected by a connecting hose 303. Each mixing box 302 is equipped with a vibrator 304. The vibration frequency of the several vibrators 304 increases sequentially from top to bottom. The mixing cylinder 30 is set inside the tank 10 by an external support, and the several mixing boxes 302 are set inside the mixing cylinder 30 by a shock-absorbing support.

[0030] The vibration of vibrator 304 causes slight vibration in each mixing chamber 302, resulting in more frequent contact between suspended particles. This not only helps break down the electrostatic or van der Waals forces on the surface of the suspended particles, but also promotes collision and aggregation between them. This allows fine suspended matter to combine into larger particles more quickly and begin to settle, accelerating the sedimentation rate. When the wastewater is at the bottom of the mixing chamber 302, the reagent has just come into contact with the wastewater. Therefore, a slightly stronger vibration is used to promote collision and aggregation between suspended particles. As the wastewater rises, the longer the contact time between the reagent and the wastewater, the stronger the vibration is used to avoid affecting the aggregation of suspended particles. This greatly promotes the aggregation of suspended matter, allowing the aggregates to float on the water surface, increasing work efficiency and improving the wastewater treatment effect. Furthermore, the vibration intensity of vibrator 304 can be freely adjusted according to the wastewater inflow speed. The faster the wastewater inflow speed, the shorter the residence time of the wastewater in the mixing chamber 302. Increasing the vibration intensity can effectively promote the mixing of reagent and wastewater.

[0031] Example 4: Based on Embodiment 3, please refer carefully to the accompanying drawings. Figure 1 - Figure 5As shown, each mixing chamber 302 is equipped with a drive box 40, on which a rotating ring 401 is rotatably mounted. Several evenly distributed mixing blades 402 are arranged on the outer side of the rotating ring 401, with the rotation speed of the rotating rings 401 increasing sequentially from top to bottom. A vertical rod 305 is also provided inside the mixing cylinder 30, passing through several mixing chambers 302 and connecting hoses 303. The drive box 40 is mounted on the vertical rod 305. A drive shaft 403 and a drive shaft 404 are rotatably mounted at both the upper and lower ends of each drive box 40. The drive shaft 403 and drive shaft 404 are connected by a connecting rod 405. Each drive shaft 403 is equipped with a speed reduction component 406. A drive motor 106 is located at the lower end of the tank 10, and the output end of the drive motor 106 is connected to the lowermost drive shaft 404 via a connecting rod. The speed reduction assembly 406 consists of a rotating shaft, gears of different sizes that mesh with each other, and a chain and sprocket. A gear ring is provided inside the rotating ring 401, and a power gear 407 mounted on the drive shaft 404 is provided inside the drive box 40. The power gear 407 drives the gear ring to rotate.

[0032] When the reagent and suspended solids are mixed, flocs are formed. When the mixing blade 402 rotates rapidly, although the reagent and suspended solids combine more quickly, the rapidly rotating mixing blade 402 will also break up the flocs after they form. When the mixing blade 402 rotates slowly, the mixing efficiency of the reagent and suspended solids is slower, reducing the working efficiency. As the sewage inside the tank 10 continues to increase, if the upper and lower mixing blades 402 increase in speed simultaneously, the mixing blade 402 at the top will easily break up the formed agglomerates. Therefore, the speed reduction component 406 makes the rotation speed of the rotating ring 401 increase from top to bottom, that is, the rotation speed of the mixing blade 402 gradually decreases from bottom to top, so as to avoid breaking up the agglomerates while ensuring the mixing efficiency.

[0033] Wastewater first comes into contact with the agent and enters the bottom of the mixing cylinder 30. At this point, the agent and wastewater come into contact. At the bottom of the mixing cylinder 30, the mixing blades 402 rotate rapidly, which makes the agent and suspended solids fully mixed. As wastewater is continuously added, the agent and suspended solids also rise continuously, and the rotation speed of the mixing blades 402 in contact with them decreases continuously. Therefore, while making the coagulant and impurities in the wastewater combine more quickly, it avoids the rapid stirring blades from breaking up the flocs, thus improving work efficiency.

[0034] Example 5: Based on Example 4, please refer carefully to the accompanying drawings. Figure 2 - Figure 6 As shown, Several rotating blocks 413 are rotatably mounted on the outer side of the rotating ring 401. Mixing vanes 402 are mounted on the rotating blocks 413. A meshing rack and pinion 414 is provided inside the rotating ring 401, and the rotating blocks 413 are connected to the gear shaft of the rack and pinion 414. A slidingly mounted lifting ring 415 is provided inside the rotating ring 401, and the lifting ring 415 is connected to the rack of the rack and pinion 414. An arc-pressing plate 412 is slidably mounted inside the drive box 40. A rotating disk 408 is mounted on the connecting rod 405. Several sliding frames 409 are provided on the rotating disk 408, which are equidistantly distributed around the connecting rod 405. A trapezoidal arc plate 410 slides on each sliding frame 409, and a compression spring 411 is provided on one side of the trapezoidal arc plate 410. One end of the arc-pressing plate 412 contacts the inclined surface of the trapezoidal arc plate 410, and the other end is connected to the lifting ring 415.

[0035] The rotating disk 408 rotates following the connecting rod 405. Since the trapezoidal arc plate 410 rotates around the connecting rod 405 on the sliding frame 409, under the action of centrifugal force, the trapezoidal arc plate 410 slides on the sliding frame 409. Because the lower end of the pressure plate 412 contacts the inclined surface of the trapezoidal arc plate 410, the pressure plate 412 is continuously pushed up. The pressure plate 412 drives the lifting ring 415 to move. The lifting ring 415, through the rack and pinion 414, causes the rotating block 413 to rotate, thereby... The mixing blade 402 rotates. Because the angle of the mixing blade 402 is deflected, the rotation angle of the mixing blade 402 does not exceed 45°, which can avoid direct impact on the agglomerates and cause them to disperse. Therefore, this processor can deflect the angle of the mixing blade 402 when the rotation speed of the mixing blade 402 is too fast to avoid direct impact on the agglomerates and cause them to disperse. When the rotation speed of the mixing blade 402 is slow, the mixing blade 402 is vertical, providing a higher turbulence effect.

[0036] Example 6: Based on Example 5, please refer carefully to the accompanying drawings. Figure 2 and Figure 3 As shown, the top of the diversion pipe 306 is connected to an integrated external cavity, and a gas distributor 501 is installed inside the external cavity. The tank 10 is equipped with an air pump 50 that supplies gas to the gas distributor 501. The gas distributor 501 evenly releases gas into the wastewater, thereby forming a large number of microbubbles in the wastewater. These bubbles can adhere to the surface of oil droplets and suspended particles in the wastewater, increasing their buoyancy and further promoting oil-water separation. Simultaneously, the rising motion of the bubbles also acts as a stirrer, helping to fully mix the flocculant with the wastewater and improving treatment efficiency.

[0037] The present invention has been described by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. A marine sewage treatment device, characterized in that, The system includes a tank (10), which is provided with a sewage inlet (101), a clean water outlet (102), and an oil outlet (103). The tank (10) is provided with a drainage pipe (201) and a mixing cylinder (30). The top end of the drainage pipe (201) is connected to the sewage inlet (101), and the bottom end of the sewage inlet (101) is connected to the mixing cylinder (30) via a dosing device (20). A partition (104) is fixedly provided inside the tank (10). The drainage pipe (201) and the mixing cylinder (30) both pass through the partition (104). The partition (104) has a mesh structure. A packing layer (105) is provided inside the tank (10) and above the partition (104). The clean water outlet (102) is connected to the space below the partition (104). The oil outlet (103) is located near the top of the tank (10). The mixing cylinder (30) is provided with a diversion pipe (306) and a transfer box (301) at its upper and lower ends respectively. A number of mixing boxes (302) are provided between the diversion pipe (306) and the transfer box (301). The diversion pipe (306), the transfer box (301) and the number of mixing boxes (302) are all connected by a connecting hose (303). Each of the mixing boxes (302) is provided with a vibrator (304). The vibration frequency of the number of vibrators (304) increases sequentially from top to bottom. Each of the mixing box bodies (302) is provided with a drive box (40), and a rotating ring (401) is rotatably mounted on the drive box (40). Several uniformly distributed mixing blades (402) are provided on the outer side of the rotating ring (401), and the rotation speed of the several rotating rings (401) increases sequentially from top to bottom.

2. The marine sewage treatment plant according to claim 1, characterized in that: The dosing device (20) includes a docking pipe (202) and a dosing tank (205). One end of the docking pipe (202) is connected to the drainage pipe (201), and the other end is connected to the transfer box (301) of the mixing cylinder (30). The dosing tank (205) is located above the docking pipe (202), and a dosing outlet pipe (206) is connected between the dosing tank (205) and the docking pipe (202).

3. A marine sewage treatment device according to claim 2, characterized in that: A follower shaft (203) is rotatably mounted on the docking pipe (202). The follower shaft (203) is axially connected to a rotating paddle (204) located inside the docking pipe (202). A rotating shaft (207) is rotatably mounted inside the drug outlet pipe (206). An auger is mounted on the rotating shaft (207). The follower shaft (203) and the rotating shaft (207) are connected by two meshing bevel gears.

4. A marine sewage treatment device according to claim 1, characterized in that: The mixing cylinder (30) is installed inside the tank (10) by an external support. Several mixing boxes (302) are installed inside the mixing cylinder (30) by a shock-absorbing support. A vertical rod (305) is also installed inside the mixing cylinder (30). The vertical rod (305) passes through several mixing boxes (302) and connecting hoses (303). The drive box (40) is installed on the vertical rod (305).

5. A marine sewage treatment device according to claim 1, characterized in that: Each drive box (40) has a drive shaft (403) and a drive shaft (404) rotatably mounted at both the upper and lower ends. The drive shaft (403) and the drive shaft (404) are connected by a connecting rod (405). Each drive shaft (403) is equipped with a speed reduction component (406). The lower end of the tank (10) is equipped with a drive motor (106). The output end of the drive motor (106) is connected to the lowermost drive shaft (404) via a connecting rod.

6. A marine sewage treatment device according to claim 5, characterized in that: The speed reduction assembly (406) consists of a shaft, gears of different sizes that mesh with each other, and a chain and sprocket.

7. A marine sewage treatment device according to claim 5, characterized in that: A plurality of rotating blocks (413) are rotatably mounted on the outer side of the rotating ring (401), and the mixing blades (402) are mounted on the rotating blocks (413). The rotating ring (401) is provided with meshing rack and pinion gears (414) inside, and the rotating blocks (413) are connected to the gear shafts in the rack and pinion gears (414). The rotating ring (401) is provided with a slidingly mounted lifting ring (415) and gear ring inside, and the lifting ring (415) is connected to the rack in the rack and pinion gears (414). The drive box (40) is provided with a power gear (407) mounted on the drive shaft (404) inside, and the power gear (407) drives the gear ring to rotate.

8. A marine sewage treatment device according to claim 7, characterized in that: An arc-pressing plate (412) is slidably installed inside the drive box (40). A rotating disk (408) is installed on the connecting rod (405). The rotating disk (408) is provided with several sliding frames (409) that are equidistantly distributed around the connecting rod (405). Each sliding frame (409) has a sliding trapezoidal arc plate (410) on it. A compression spring (411) is provided on one side of the trapezoidal arc plate (410). One end of the arc-pressing plate (412) is in contact with the inclined surface of the trapezoidal arc plate (410), and the other end is connected to the lifting ring (415).

9. A marine sewage treatment device according to claim 1, characterized in that: The top of the diversion pipe (306) is connected to an integrated external cavity, and a gas distributor (501) is provided in the external cavity. The tank (10) is provided with a gas pump (50) to provide gas to the gas distributor (501).

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