Ship wastewater treatment device

Abstract

The utility model belongs to the technical field of ship wastewater treatment, and particularly relates to a ship wastewater treatment device which comprises an air flotation treatment assembly, an ultrafiltration treatment assembly, a nanofiltration treatment assembly and a reverse osmosis treatment assembly, the nanofiltration treatment assembly is composed of a plurality of roll type nanofiltration membrane filter cartridges, the reverse osmosis treatment assembly is composed of a plurality of reverse osmosis membrane filter cartridges and a booster pump, the air flotation treatment assembly is composed of an air flotation machine body, wastewater is subjected to air flotation treatment through the air flotation treatment assembly firstly, then the wastewater enters the ultrafiltration treatment assembly to be subjected to ultrafiltration treatment, and then the wastewater enters the ultrafiltration treatment assembly to be subjected to ultrafiltration treatment. According to the device, the wastewater enters the nanofiltration treatment assembly, then the wastewater enters the nanofiltration treatment assembly, and finally the wastewater enters the reverse osmosis treatment assembly, so that the wastewater is efficiently treated, and the treatment effect on the ship wastewater can be improved through various types of classification treatment.

Description

Technical Field

[0001] The utility model relates to the technical field of ship wastewater treatment, in particular to a ship wastewater treatment device. Background Art

[0002] In the daily operation of ships, the engine room will produce wastes such as sewage, oil residue and waste oil, which are generally treated as waste. Therefore, oily wastewater must be properly treated before discharge.

[0003] A Chinese patent (authorization announcement number: CN 209974368 U, authorization announcement date: 2020.01.21) proposes a device for recovering waste oil from ship oily wastewater. This patent is used for a device for recovering waste oil from ship oily wastewater. While achieving the purpose of recovering waste oil from wastewater, it can greatly improve the demulsification effect of drug catalysis, facilitate the recovery of oil pollution, and effectively improve work efficiency.

[0004] The above patent removes impurities through a filter and then treats the wastewater through a mixed agent catalysis. The patent has a relatively single method for treating ship engine room wastewater and cannot achieve a good treatment effect. This application is to classify the wastewater generated by the ship into multiple categories to avoid substandard wastewater treatment due to changes in the content of components in the water. We propose a ship wastewater treatment device. Utility Model Content

[0005] In view of the shortcomings of the prior art, the utility model provides a ship wastewater treatment device. The wastewater is first subjected to flotation treatment by an air flotation treatment component, and then the wastewater enters an ultrafiltration treatment component for ultrafiltration treatment, and then the wastewater enters a nanofiltration treatment component, and finally the wastewater enters a reverse osmosis treatment component, so that the wastewater is efficiently treated. The device can improve the treatment effect of ship wastewater through multiple classification treatments, meet emission standards, and solve the background problem.

[0006] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] A ship wastewater treatment device comprises an air flotation treatment component, an ultrafiltration treatment component, a nanofiltration treatment component and a reverse osmosis treatment component, wherein the ultrafiltration treatment component is composed of a plurality of tubular ultrafiltration membrane cartridges and a water pump, the nanofiltration treatment component is composed of a plurality of rolled nanofiltration membrane cartridges, the reverse osmosis treatment component is composed of a plurality of reverse osmosis membrane cartridges and a booster pump, and the air flotation treatment component is composed of an air flotation body.

[0008] Preferably, the interior of the flotation body is provided with a dosing area, a bubble attachment area, a scraping area and a slag discharge area, two groups of dosing cartridges are arranged on the left side of the flotation body, a dosing pump is installed on the flotation body, the liquid inlet end of the dosing pump is fixedly connected with the dosing cartridge through a pipeline, the liquid outlet end of the dosing pump is connected with the interior of the dosing area through a medicine outlet pipe, a waste liquid inlet pipe is installed on the dosing area, a mixing and stirring mechanism is arranged on the right side of the waste liquid inlet pipe, a bubble release tube is installed inside the bubble attachment area, and a scraping mechanism is installed above the scraping area.

[0009] Preferably, an ultrafiltration membrane filter element is installed inside the tubular ultrafiltration membrane filter cartridge, the liquid inlet end of the water pump is fixedly connected to the clean water outlet end of the flotation body through a connecting pipe, the liquid outlet end of the water pump is fixedly connected to an impurity filter cartridge, the liquid outlet end of the impurity filter cartridge is fixedly connected to the tubular ultrafiltration membrane filter cartridge through a pipeline, the clean water outlet end of the tubular ultrafiltration membrane filter cartridge is fixedly connected to the inside of a rolled nanofiltration membrane filter cartridge through a pipeline, a nanofiltration membrane filter element is installed inside the rolled nanofiltration membrane filter cartridge, the clean water outlet end of the rolled nanofiltration membrane filter cartridge is fixedly connected to the input end of a booster pump through a pipeline, the output end of the booster pump is fixedly connected to the liquid inlet end of a reverse osmosis membrane filter cartridge through a pipeline, an anti-seepage membrane filter element is installed inside the reverse osmosis membrane filter cartridge, and the clean water outlet end of the reverse osmosis membrane filter cartridge is connected to a clean water outlet pipe.

[0010] Preferably, polyacrylamide coagulant and polyaluminium chloride flocculant are placed inside the two groups of drug adding cartridges respectively.

[0011] Preferably, a filter screen, a filter nonwoven fabric and filter cotton are installed in sequence from top to bottom inside the impurity filter cartridge.

[0012] Preferably, the mixing and stirring mechanism includes a mounting shell and a driving motor, the mounting shell is fixedly connected above the dosing area, a rotating shaft is rotatably penetrated through the top of the mounting shell, a rotating disk is fixedly connected to the bottom of the rotating shaft, the rotating disk is rotatably connected to the bottom of the mounting shell, a plurality of rotating columns are rotatably penetrated through the rotating disk, a stirring blade is fixedly connected to the bottom of the rotating column, a gear is fixedly connected to the top of the rotating column, a rotating sleeve is rotatably sleeved on the outer surface of the rotating shaft, a plurality of fixed plates are fixedly connected to the outer surface of the rotating sleeve, one end of the fixed plate is connected to the inner surface of the mounting shell The wall is fixedly connected, and a gear ring is fixedly connected to several fixed plates, and the gear ring is meshed with the gear. The top of the rotating shaft is fixedly connected to a driven bevel gear, and a rotating rod is rotatably installed on the top of the mounting shell, one end of the rotating rod is fixedly connected to an active bevel gear, and the active bevel gear is meshed with the driven bevel gear, and the other end of the rotating rod is fixedly connected to a driven pulley, and the driving motor is fixedly installed on the outside of the air flotation body, and the output end of the driving motor is fixedly connected to a driving pulley, and a first belt is connected between the driving pulley and the driven pulley.

[0013] Preferably, the scraping mechanism includes left and right mounting rods, which are rotatably mounted on the flotation body, and the front and rear ends of the mounting rods are fixedly connected with sprockets, a transmission chain is tensioned and sleeved between the corresponding left and right sprockets, and a number of scrapers are fixedly connected between the front and rear transmission chains.

[0014] Preferably, the end of the left mounting rod is fixedly connected to the first transmission pulley, the end of the rotating rod is fixedly connected to the second transmission pulley, and a second belt is tensionedly sleeved between the first transmission pulley and the second transmission pulley.

[0015] Preferably, a plurality of heat dissipation fins are fixedly mounted on the outer surface of the drive motor.

[0016] Preferably, a flow valve is installed on the waste liquid inlet pipe.

[0017] Beneficial Effects

[0018] The utility model provides a ship wastewater treatment device. Compared with the prior art, it has the following beneficial effects:

[0019] 1. In this ship wastewater treatment device, the wastewater is first subjected to flotation treatment by an air flotation treatment component, and then the wastewater enters an ultrafiltration treatment component for ultrafiltration treatment, and then the wastewater enters a nanofiltration treatment component, and finally the wastewater enters a reverse osmosis treatment component, so that the wastewater is efficiently treated. This device can improve the treatment effect of ship wastewater through multiple classification treatments and meet the emission standards.

[0020] 2. A ship wastewater treatment device is provided with a mixing and stirring mechanism for improving the mixing effect of the reagent and the pretreated wastewater. When in use, the driving motor is started. When the driving motor is working, it will drive the rotating rod to rotate through the first belt. Since the active bevel gear is meshed with the driven bevel gear, it will drive the rotating shaft to rotate. When the rotating shaft rotates, it will drive the turntable and a number of stirring blades to revolve. Since the ring gear is fixed to the inside of the mounting shell through a fixed plate, when the turntable revolves, it will drive the gear to revolve along the fixed ring gear. Since the ring gear is meshed with the gear, the stirring blade will rotate at the same time when it revolves, thereby improving the mixing effect of the reagent and the wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0022] Figure 2 It is a schematic diagram of the structures of the ultrafiltration treatment component, the nanofiltration treatment component and the reverse osmosis treatment component of the utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the air flotation treatment component of the utility model;

[0024] Figure 4 This is a schematic diagram of the internal structure of the air flotation treatment component of the utility model;

[0025] Figure 5 This is a schematic diagram of the structure of the mixing and stirring mechanism of the utility model;

[0026] Figure 6 This is a schematic diagram of the structure of the mixing and stirring mechanism of the utility model without the mounting shell.

[0027] In the figure: 1, ultrafiltration treatment component; 2, nanofiltration treatment component; 3, reverse osmosis treatment component; 4, flotation treatment component; 5, tubular ultrafiltration membrane filter cartridge; 6, connecting pipe; 7, impurity filter cartridge; 8, water pump; 9, gear ring; 10, rolled nanofiltration membrane filter cartridge; 11, booster pump; 12, reverse osmosis membrane filter cartridge; 13, dosing cartridge; 14, dosing pump; 15, waste liquid inlet pipe; 16, bubble release tube; 17, installation rod; 18, transmission chain; 19, Scraper; 20, air flotation body; 21, second belt; 22, driving motor; 23, first belt; 24, medicine outlet pipe; 25, medicine adding area; 26, bubble attachment area; 27, slag scraping area; 28, slag discharge area; 29, mounting shell; 30, rotating rod; 31, turntable; 32, rotating sleeve; 33, rotating shaft; 34, active bevel gear; 35, gear; 36, driven bevel gear; 37, fixed plate; 38, rotating column; 39, stirring blade. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] See also Figure 1-4The utility model provides a technical solution: a ship wastewater treatment device, including an air flotation treatment component 4, an ultrafiltration treatment component 1, a nanofiltration treatment component 2 and a reverse osmosis treatment component 3, the ultrafiltration treatment component 1 is composed of a plurality of tubular ultrafiltration membrane filter cartridges 5 and a water pump 8, the nanofiltration treatment component 2 is composed of a plurality of rolled nanofiltration membrane filter cartridges 10, the reverse osmosis treatment component 3 is composed of a plurality of reverse osmosis membrane filter cartridges 12 and a booster pump 11, the air flotation treatment component 4 is composed of an air flotation body 20, and the air flotation body 20 is composed of a plurality of The interior is provided with a dosing area 25, a bubble attachment area 26, a scraping area 27 and a slag discharge area 28. The left side of the air flotation body 20 is provided with two groups of dosing cartridges 13. A dosing pump 14 is installed on the air flotation body 20. The liquid inlet end of the dosing pump 14 is fixedly connected with the dosing cartridge 13 through a pipeline. The liquid outlet end of the dosing pump 14 is connected with the interior of the dosing area 25 through a medicine outlet pipe 24. A waste liquid inlet pipe 15 is installed on the dosing area 25. A mixing and stirring mechanism is arranged on the right side of the waste liquid inlet pipe 15. The bubble attachment area 26 is provided with a mixing and stirring mechanism. The bubble release tube 16 is installed inside the zone 26, and a scraping mechanism is installed above the scraping zone 27. An ultrafiltration membrane filter element is installed inside the tubular ultrafiltration membrane filter cartridge 5. The liquid inlet end of the water pump 8 is fixedly connected to the clean water outlet end of the air flotation body 20 through the connecting pipe 6. The liquid outlet end of the water pump 8 is fixedly connected to the impurity filter cartridge 7. The liquid outlet end of the impurity filter cartridge 7 is fixedly connected to the tubular ultrafiltration membrane filter cartridge 5 through a pipeline. The clean water outlet end of the tubular ultrafiltration membrane filter cartridge 5 is connected to the inside of the roll-type nanofiltration membrane filter cartridge 10 through a pipeline. Fixedly connected, a nanofiltration membrane filter element is installed inside the rolled nanofiltration membrane filter cartridge 10, the clean water outlet of the rolled nanofiltration membrane filter cartridge 10 is fixedly connected to the input end of the booster pump 11 through a pipeline, the output end of the booster pump 11 is fixedly connected to the liquid inlet end of the reverse osmosis membrane filter cartridge 12 through a pipeline, an anti-seepage membrane filter element is installed inside the reverse osmosis membrane filter cartridge 12, the clean water outlet of the reverse osmosis membrane filter cartridge 12 is connected to a clean water outlet pipe, and polyacrylamide coagulant and polyaluminium chloride flocculant are placed inside the two groups of dosing cartridges 13 respectively.

[0030] When the device is used, first, the wastewater enters the flotation treatment component 4 through the waste liquid inlet pipe for flotation treatment. The flotation technology relies on the buoyancy of bubbles to achieve the separation of solids and liquids. In the flotation process, a large number of fine bubbles are generated by introducing air or other gases into the water. These bubbles adhere to the suspended particles in the water, making the density of the particles less than that of water, so that they float to the water surface to form scum by relying on the buoyancy, achieving the purpose of solid-liquid separation. Then, the impurities in the wastewater can be pre-treated through the flotation treatment component 4, and the pre-treated wastewater enters the ultrafiltration treatment component 1 through the connecting pipe 6. The ultrafiltration treatment component 1 is used for ultrafiltration treatment. The ultrafiltration treatment shell removes suspended matter, colloids and macromolecular organic impurities in the wastewater. After that, the wastewater enters the nanofiltration treatment component 2. The basic principle of nanofiltration treatment is to use ultrafine filter membranes to intercept impurities, colloids, bacteria, etc. in water. The pore size of the nanofiltration membrane is generally between 1-100 nanometers, which is finer than traditional filter membranes. In the field of water treatment, nanofiltration technology is often used to remove pollutants and improve water quality. Nanofiltration treatment can effectively remove impurities, colloids, bacteria, etc. in water, so that the water quality is significantly improved. Then the wastewater enters the reverse osmosis treatment component 3. Reverse osmosis treatment can be used to remove soluble ions and microscopic particles in the wastewater, so as to obtain high-purity water. Finally, the clean water can be discharged. Then, this device can improve the treatment effect of ship wastewater through multiple classification treatments to meet the emission standards.

[0031] The interior of the impurity filter cylinder 7 is installed with a filter screen, a filter non-woven fabric and a filter cotton from top to bottom. The filter screen, the filter non-woven fabric and the filter cotton can remove large particles of impurities in the wastewater in advance to avoid large particles of impurities clogging the pipeline, thereby improving the treatment effect of the wastewater.

[0032] The mixing and stirring mechanism includes a mounting shell 29 and a driving motor 22. The mounting shell 29 is fixedly connected to the top of the dosing area 25. A rotating shaft 33 is rotatably penetrated at the top of the mounting shell 29. A rotating disk 31 is fixedly connected to the bottom of the rotating shaft 33. The rotating disk 31 is rotatably connected to the bottom of the mounting shell 29. A plurality of rotating columns 38 are rotatably penetrated on the rotating disk 31. A stirring blade 39 is fixedly connected to the bottom of the rotating column 38. A gear 35 is fixedly connected to the top of the rotating column 38. A rotating sleeve 32 is rotatably sleeved on the outer surface of the rotating shaft 33. A plurality of fixed plates 37 are fixedly connected to the outer surface of the rotating sleeve 32. One end of the fixed plate 37 is connected to the mounting shell 29. The inner wall of the air flotation body 20 is fixedly connected, a gear ring 9 is fixedly connected to the plurality of fixed plates 37, the gear ring 9 is meshed with the gear 35, the top of the rotating shaft 33 is fixedly connected to a driven bevel gear 36, a rotating rod 30 is rotatably installed above the mounting shell 29, one end of the rotating rod 30 is fixedly connected to a driving bevel gear 34, the driving bevel gear 34 is meshed with the driven bevel gear 36, the other end of the rotating rod 30 is fixedly connected to a driven pulley, the driving motor 22 is fixedly installed on the outside of the air flotation body 20, the output end of the driving motor 22 is fixedly connected to the driving pulley, and a first belt 23 is connected between the driving pulley and the driven pulley.

[0033] The mixing and stirring mechanism is used to improve the mixing effect of the medicine and the pretreated wastewater. When in use, the drive motor 22 is started. When the drive motor 22 is working, it will drive the rotating rod 30 to rotate through the first belt 23. Since the active bevel gear 34 is engaged with the driven bevel gear 36, it will drive the rotating shaft 33 to rotate. When the rotating shaft 33 rotates, it will drive the turntable 31 and a plurality of stirring blades 39 to revolve. Since the ring gear 9 is fixed to the inside of the mounting shell 29 through the fixing plate 37, when the turntable 31 revolves, it will drive the gear 35 to revolve along the fixed ring gear 9. Since the ring gear 9 is engaged with the gear 35, the stirring blade 39 will rotate at the same time when it revolves, thereby improving the mixing effect of the medicine and the wastewater.

[0034] The scraper mechanism includes left and right mounting rods 17, which are rotatably mounted on the flotation body 20. The front and rear ends of the mounting rods 17 are fixedly connected with sprockets, and a transmission chain 18 is tensioned and sleeved between the corresponding left and right sprockets. A number of scrapers 19 are fixedly connected between the front and rear transmission chains 18.

[0035] The end of the left mounting rod 17 is fixedly connected to the first transmission pulley, the end of the rotating rod 30 is fixedly connected to the second transmission pulley, and a second belt 21 is tensionedly sleeved between the first transmission pulley and the second transmission pulley.

[0036] When the driving motor 22 is working, the second belt 21 will simultaneously drive the installation rod 17 on the left side to rotate. When the installation rod 17 rotates, the transmission chain 18 will drive the scraper 19 to rotate.

[0037] A plurality of heat dissipation fins are fixedly mounted on the outer surface of the driving motor 22 .

[0038] A flow valve is installed on the waste liquid inlet pipe 15 to control the flow rate of the waste liquid entering.

[0039] Working principle: When the device is used, wastewater enters the flotation body 20 through the wastewater inlet pipe 15, where the wastewater will be flotated, and the sewage enters the dosing area 26, where PAM (polyacrylamide) and PAC (polyaluminium chloride) are added through the dosing cylinder 13. The dosing area is equipped with a mixing and stirring mechanism. After the reagents and sewage fully react, cotton-like substances are formed and enter the bubble attachment area 26. The bubble release tube 16 releases a large number of tiny bubbles, which are attached to the suspended matter after the reaction, increasing the buoyancy to make it float to the scraping area 27. The scraper 19 controlled by the chain scrapes the scum on the water surface to the slag discharge area 28.

[0040] The pretreated wastewater is sent to the impurity filter cartridge 7 by the water pump 8 for impurity removal treatment. The impurity filter cartridge 7 can remove large particles of impurities in the wastewater in advance through the filter screen, filter non-woven fabric and filter cotton, so as to avoid large particles of impurities clogging the pipeline and improve the treatment effect of the wastewater. After that, the wastewater enters the tubular ultrafiltration membrane filter cartridge 5 for ultrafiltration treatment. The ultrafiltration treatment shell removes suspended matter, colloid and macromolecular organic impurities in the wastewater. After that, the wastewater enters the rolled nanofiltration membrane filter cartridge 10. The basic principle of nanofiltration treatment is to use ultrafine filter membrane to remove impurities, colloids and bacteria in the water. The pore size of the nanofiltration membrane is generally between 1-10 nanometers, and the effect is better when it is set between 1-2 nanometers. It is finer than the traditional filtration membrane. In the field of water treatment, nanofiltration technology is often used to remove pollutants and improve water quality. Nanofiltration treatment can effectively remove impurities, colloids, bacteria, etc. in water, so that the water quality is significantly improved. Then the wastewater enters the osmotic membrane filter cartridge 12, and reverse osmosis treatment can be used to remove soluble ions and microscopic particles in the wastewater, thereby obtaining high-purity water. Then, this device can improve the treatment effect of ship wastewater through multiple classification treatments, and meet the emission standards;

[0041] The mixing and stirring mechanism is used to improve the mixing effect of the medicine and the pretreated wastewater. When in use, the drive motor 22 is started. When the drive motor 22 is working, it will drive the rotating rod 30 to rotate through the first belt 23. Since the active bevel gear 34 is engaged with the driven bevel gear 36, it will drive the rotating shaft 33 to rotate. When the rotating shaft 33 rotates, it will drive the turntable 31 and a plurality of stirring blades 39 to revolve. Since the ring gear 9 is fixed to the inside of the mounting shell 29 through the fixing plate 37, when the turntable 31 revolves, it will drive the gear 35 to revolve along the fixed ring gear 9. Since the ring gear 9 is engaged with the gear 35, the stirring blade 39 will rotate at the same time when it revolves, thereby improving the mixing effect of the medicine and the wastewater.

[0042] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0043] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A ship wastewater treatment device, comprising an air flotation treatment component (4), an ultrafiltration treatment component (1), a nanofiltration treatment component (2) and a reverse osmosis treatment component (3), characterized in that: The ultrafiltration treatment component (1) is composed of a plurality of tubular ultrafiltration membrane cartridges (5) and a water pump (8), the nanofiltration treatment component (2) is composed of a plurality of rolled nanofiltration membrane cartridges (10), the reverse osmosis treatment component (3) is composed of a plurality of reverse osmosis membrane cartridges (12) and a booster pump (11), and the flotation treatment component (4) is composed of an air flotation body (20); An ultrafiltration membrane filter element is installed inside the tubular ultrafiltration membrane filter cartridge (5); the liquid inlet end of the water pump (8) is fixedly connected to the clean water outlet end of the air flotation body (20) via a connecting pipe (6); the liquid outlet end of the water pump (8) is fixedly connected to an impurity filter cartridge (7); the liquid outlet end of the impurity filter cartridge (7) is fixedly connected to the tubular ultrafiltration membrane filter cartridge (5) via a pipeline; the clean water outlet end of the tubular ultrafiltration membrane filter cartridge (5) is connected to a rolled nanofiltration membrane filter cartridge (10) via a pipeline. The interior of the rolled nanofiltration membrane cartridge (10) is fixedly connected, a nanofiltration membrane filter element is installed inside the rolled nanofiltration membrane cartridge (10), the clean water outlet end of the rolled nanofiltration membrane cartridge (10) is fixedly connected to the input end of the booster pump (11) via a pipeline, the output end of the booster pump (11) is fixedly connected to the liquid inlet end of the reverse osmosis membrane cartridge (12) via a pipeline, an anti-seepage membrane filter element is installed inside the reverse osmosis membrane cartridge (12), and the clean water outlet end of the reverse osmosis membrane cartridge (12) is connected to a clean water outlet pipe.

2. A ship wastewater treatment device according to claim 1, characterized in that: The air flotation body (20) is provided with a drug adding area (25), a bubble attachment area (26), a scraping area (27) and a slag discharge area (28) inside. Two groups of drug adding cartridges (13) are provided on the left side of the air flotation body (20). A drug adding pump (14) is installed on the air flotation body (20). The liquid inlet end of the drug adding pump (14) is fixedly connected to the drug adding cartridge (13) through a pipeline. The liquid outlet end of the drug adding pump (14) is connected to the inside of the drug adding area (25) through a drug outlet pipe (24). A waste liquid inlet pipe (15) is installed on the drug adding area (25). A mixing and stirring mechanism is provided on the right side of the waste liquid inlet pipe (15). A bubble releasing pipe (16) is installed inside the bubble attachment area (26). A scraping mechanism is installed above the scraping area (27).

3. A ship wastewater treatment device according to claim 2, characterized in that: Polyacrylamide coagulant and polyaluminium chloride flocculant are respectively placed inside the two groups of dosing cartridges (13).

4. A ship wastewater treatment device according to claim 3, characterized in that: The interior of the impurity filter cartridge (7) is provided with a filter screen, a filter non-woven fabric, and filter cotton in sequence from top to bottom.

5. A ship wastewater treatment device according to claim 4, characterized in that: The mixing and stirring mechanism comprises a mounting shell (29) and a driving motor (22), wherein the mounting shell (29) is fixedly connected above the dosing area (25), a rotating shaft (33) is rotatably penetrated through the top of the mounting shell (29), a rotating disk (31) is fixedly connected to the bottom of the rotating shaft (33), the rotating disk (31) is rotatably connected to the bottom of the mounting shell (29), a plurality of rotating columns (38) are rotatably penetrated through the rotating disk (31), a stirring blade (39) is fixedly connected to the bottom of the rotating column (38), a gear (35) is fixedly connected to the top of the rotating column (38), a rotating sleeve (32) is rotatably sleeved on the outer surface of the rotating shaft (33), a plurality of fixed plate members (37) are fixedly connected to the outer surface of the rotating sleeve (32), one end of the fixed plate member (37) is connected to the rotating shaft (33), and a plurality of fixed plate members (37) are fixedly connected to the rotating shaft (33). The mounting shell (29) is fixedly connected to the inner wall thereof; a plurality of fixing plates (37) are fixedly connected to a gear ring (9) which meshes with a gear (35); a top end of the rotating shaft (33) is fixedly connected to a driven bevel gear (36); a rotating rod (30) is rotatably mounted above the mounting shell (29); one end of the rotating rod (30) is fixedly connected to a driving bevel gear (34) which meshes with a driven bevel gear (36); the other end of the rotating rod (30) is fixedly connected to a driven pulley; the driving motor (22) is fixedly mounted on the outside of the air flotation body (20); an output end of the driving motor (22) is fixedly connected to a driving pulley; a first belt (23) is connected between the driving pulley and the driven pulley.

6. A ship wastewater treatment device according to claim 5, characterized in that: The scraping mechanism comprises left and right mounting rods (17), the mounting rods (17) being rotatably mounted on the air flotation body (20), the front and rear ends of the mounting rods (17) being fixedly connected to sprockets, a transmission chain (18) being tensioned and sleeved between the corresponding left and right sprockets, and a plurality of scrapers (19) being fixedly connected between the front and rear transmission chains (18).

7. A ship wastewater treatment device according to claim 6, characterized in that: The end of the left mounting rod (17) is fixedly connected to a first transmission pulley, the end of the rotating rod (30) is fixedly connected to a second transmission pulley, and a second belt (21) is tensionedly sleeved between the first transmission pulley and the second transmission pulley.

8. A ship wastewater treatment device according to claim 7, characterized in that: A plurality of heat dissipation fins are fixedly mounted on the outer surface of the drive motor (22).

9. A ship wastewater treatment device according to claim 8, characterized in that: A flow valve is installed on the waste liquid inlet pipe (15).

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