Port environment-friendly sewage treatment and cyclic utilization system

Abstract

The invention relates to the technical field of ports, and discloses a port environment-friendly sewage treatment and cyclic utilization system which comprises a pretreatment system, a sewage filtering system and a water-oil separation and purification system.The pretreatment system comprises a pretreatment box, a sewage injection pipe, a cover plate and a grating structure; a sewage injection pipe is fixedly mounted outside the pretreatment box, and a grid structure is movably mounted inside the pretreatment box. According to the environment-friendly sewage treatment and cyclic utilization system for the port, through a grid structure in the pretreatment system, large solid waste in sewage can be effectively intercepted and prevented from entering a subsequent treatment link, then the sewage subjected to preliminary cleaning flows into a filter box, coarse suspended solids are further removed by using quartz sand filter filler, and the sewage treatment and cyclic utilization efficiency is improved. The process obviously reduces the content of suspended matters in the sewage, relieves the pressure of subsequent treatment steps, and ensures that the discharged water quality reaches a higher standard, thereby protecting a water ecological system from being damaged by pollutants.

Description

Technical Field

[0001] The invention relates to the technical field of ports, and in particular to an environmentally friendly port sewage treatment and recycling system. Background Art

[0002] Ports, as vital logistics hubs, inevitably generate massive amounts of sewage during their daily operations. These sewage mainly come from ship ballast water, tank washing water, dock flushing water and port domestic sewage, which are full of harmful components, including petroleum pollutants, suspended matter, heavy metals and various organic matter.

[0003] If the harmful substances in port sewage are not properly treated and discharged at will, they will gradually accumulate in aquatic organisms and, as they are passed through the food chain, will eventually pose a serious threat to human health. At the same time, the ecological environment around the port will also be severely damaged by the discharge of sewage, such as causing eutrophication of water bodies, sediment pollution and a series of other problems. Therefore, we propose a port environmentally friendly sewage treatment and recycling system. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the present invention provides an environmentally friendly port sewage treatment and recycling system, which has the advantages of efficiently removing suspended matter, oil pollutants and pathogenic microorganisms in sewage, and solves the problem that if harmful substances in port sewage are not properly treated and are discharged indiscriminately, they will gradually accumulate in aquatic organisms, and eventually pose a serious threat to human health as they are transmitted through the food chain. At the same time, the ecological environment around the port will also suffer serious damage due to the discharge of sewage, such as causing eutrophication of water bodies, causing sediment pollution and a series of other problems.

[0006] (II) Technical solution

[0007] In order to achieve the above-mentioned purpose of efficiently removing suspended solids, oil pollutants and pathogenic microorganisms in sewage, the present invention provides the following technical solutions: a port environmentally friendly sewage treatment and recycling system, including a pretreatment system, a sewage filtration system and a water-oil separation and purification system;

[0008] The pretreatment system comprises a pretreatment box, a sewage injection pipe, a cover plate and a grille structure, wherein the sewage injection pipe is fixedly installed on the outside of the pretreatment box, the cover plate is movably installed on the top of the pretreatment box, and the grille structure is movably installed inside the pretreatment box;

[0009] The sewage filtration system includes a first connecting pipe, a filter box, a water distribution plate, a mesh plate and a quartz sand filter filler. The first connecting pipe is fixedly installed at the bottom of the pretreatment box, the filter box is fixedly installed at the bottom of the first connecting pipe, the water distribution plate is fixedly installed on the inner top wall of the filter box, the mesh plate is installed inside the filter box, and the top of the mesh plate is provided with a quartz sand filter filler.

[0010] Preferably, the water-oil separation purification system comprises a second connecting pipe, a mixing box, a motor, a driving box, a transmission wheel, a transmission belt, a mixing rod, a flocculant storage box, a sewage flocculant, a flocculant injection pipe, a third connecting pipe, a sewage purification box, a delivery pump, an oil-water separation cavity, a sewage purification cavity, a fixed plate, an oil-water separation tank, a sewage diversion pipe, a sewage diversion head, an oil-water separation filter paper, a leak plate, a liquid collecting cover, a fourth connecting pipe, an ultraviolet disinfection lamp and a drain pipe, the second connecting pipe is fixedly installed at the bottom of the filter box, the mixing box is fixedly installed at the bottom of the second connecting pipe, the motor is fixedly installed on the left side of the mixing box, the driving box is fixedly installed on the inner left wall of the mixing box, the driving box is rotatably connected to the transmission wheel, the transmission belt is movably installed on the outside of the transmission wheel, the mixing box is rotatably connected to the inside, the flocculant storage box is fixedly installed on the right side of the filter box, and the sewage flocculant is arranged inside the flocculant storage box A flocculant injection pipe is fixedly installed at the bottom of the flocculant storage box, a third connecting pipe is fixedly installed on the right side of the mixing box, a sewage purification box is installed at one end of the third connecting pipe away from the mixing box, a delivery pump is fixedly installed inside the sewage purification box, an oil-water separation inner cavity and a sewage purification inner cavity are arranged inside the sewage purification box, a fixed plate is installed inside the oil-water separation inner cavity, an oil-water separation tank is installed at the bottom of the fixed plate, a sewage diversion pipe is installed at the bottom of the fixed plate, a number of sewage diversion heads are installed outside the sewage diversion pipe, oil-water separation filter paper is installed inside the oil-water separation tank, a leak plate is fixedly installed at the bottom of the oil-water separation tank, a liquid collecting cover is fixedly installed inside the oil-water separation inner cavity, a fourth connecting pipe is fixedly installed at the bottom of the liquid collecting cover, an ultraviolet disinfection lamp is fixedly installed inside the sewage purification inner cavity, and a drain pipe is fixedly installed on the right side of the sewage purification box.

[0011] Preferably, a fixing ring is fixedly installed on the outside of the pretreatment box, four threaded rods are rotatably connected inside the cover plate, the bottoms of the four threaded rods are threadedly connected to the fixing ring, and sewage injection pipes are fixedly installed on both sides of the pretreatment box.

[0012] Preferably, the grid structure consists of a first grid with a spacing of 10-20 mm and a second grid with a spacing of 3-5 mm, the bottom of the first connecting pipe is connected to the water distribution plate, and the quartz sand filter filler is located at the bottom of the water distribution plate.

[0013] Preferably, the top and the bottom of the second connecting pipe extend to the interior of the filter box and the interior of the mixing box respectively, and the number of the transmission wheels is two, and the two transmission wheels are connected by a transmission belt.

[0014] Preferably, the output end of the motor is fixedly connected to one of the transmission wheels, a mixing rod is fixedly installed on the right side of the two transmission wheels, and the bottom of the flocculant injection pipe extends to the interior of the mixing box and is installed with a control valve.

[0015] Preferably, one end of the third connecting pipe away from the mixing box is connected to a delivery pump, and a delivery pipe connected to the top of the sewage diversion pipe is fixedly installed at the bottom of the delivery pump.

[0016] Preferably, the oil-water separation filter paper is located between the inner wall of the oil-water separation tank and the outer surface of the sewage diversion pipe, and the bottom of the fourth connecting pipe extends to the interior of the sewage purification cavity.

[0017] (III) Beneficial effects

[0018] Compared with the prior art, the present invention provides a port environment-friendly sewage treatment and recycling system, which has the following beneficial effects:

[0019] 1. The port's environmentally friendly sewage treatment and recycling system can effectively intercept larger solid waste in sewage through the grid structure in the pretreatment system to prevent these substances from entering the subsequent treatment stage. Subsequently, the sewage after preliminary cleaning flows into the filter box, and the coarse suspended matter is further removed by quartz sand filter filler. This process significantly reduces the content of suspended matter in sewage, reduces the pressure of subsequent treatment steps, ensures that the discharged water quality meets high standards, and thus protects the water ecosystem from the harm of pollutants.

[0020] 2. The port's environmentally friendly sewage treatment and recycling system has a sewage flocculant added to the mixing box in the oil-water separation purification system, and a mixing rod is used to promote the aggregation of particles to form larger sediments for easy separation. The oil-water separation filter paper inside the oil-water separation tank efficiently separates oil substances and sediment impurities from water. In addition, ultraviolet disinfection lamps are used for sterilization and disinfection to ensure that the final discharged water quality is safe and harmless. This design avoids the eutrophication of water bodies caused by the direct discharge of oily wastewater into natural water bodies, while reducing the risk of pathogenic microorganisms transmission and ensuring the safety of human health and the surrounding ecological environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention;

[0023] Figure 3 It is a schematic diagram of the pretreatment system and sewage filtration system of the present invention;

[0024] Figure 4 This is a schematic diagram of the water-oil separation and purification system of the present invention;

[0025] Figure 5 For the present invention Figure 3 A is an enlarged schematic diagram;

[0026] Figure 6 For the present invention Figure 4 The enlarged schematic diagram of point B in FIG.

[0027] In the figure: 1. Pretreatment system; 101. Pretreatment box; 102. Sewage injection pipe; 103. Cover plate; 104. Grid structure; 2. Sewage filtration system; 201. First connecting pipe; 202. Filter box; 203. Water distribution plate; 204. Mesh plate; 205. Quartz sand filter filler; 3. Water-oil separation and purification system; 301. Second connecting pipe; 302. Mixing box; 303. Motor; 304. Drive box; 305. Drive wheel; 306. Drive belt; 307. Mixing rod; 308. Flocculant storage box; 309, sewage flocculant; 310, flocculant injection tube; 311, third connecting tube; 312, sewage purification box; 313, delivery pump; 314, oil-water separation cavity; 315, sewage purification cavity; 316, fixing plate; 317, oil-water separation tank; 318, sewage diversion pipe; 319, sewage diversion head; 320, oil-water separation filter paper; 321, leak plate; 322, liquid collecting cover; 323, fourth connecting tube; 324, ultraviolet disinfection lamp; 325, drain pipe. DETAILED DESCRIPTION

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

[0029] See also Figure 1-6 , a port environment-friendly sewage treatment and recycling system, comprising a pretreatment system 1, a sewage filtration system 2 and a water-oil separation and purification system 3;

[0030] The pretreatment system 1 includes a pretreatment box 101, a sewage injection pipe 102, a cover plate 103 and a grid structure 104. The sewage injection pipe 102 is fixedly installed outside the pretreatment box 101, the cover plate 103 is movably installed on the top of the pretreatment box 101, and the grid structure 104 is movably installed inside the pretreatment box 101;

[0031] The sewage filtration system 2 includes a first connecting pipe 201, a filter box 202, a water distribution plate 203, a mesh plate 204 and a quartz sand filter filler 205. The first connecting pipe 201 is fixedly installed at the bottom of the pretreatment box 101, the filter box 202 is fixedly installed at the bottom of the first connecting pipe 201, the water distribution plate 203 is fixedly installed on the inner top wall of the filter box 202, the mesh plate 204 is installed inside the filter box 202, and the top of the mesh plate 204 is provided with a quartz sand filter filler 205.

[0032] Furthermore, the oil-water separation purification system 3 includes a second connecting pipe 301, a mixing box 302, a motor 303, a drive box 304, a transmission wheel 305, a transmission belt 306, a mixing rod 307, a flocculant storage box 308, a sewage flocculant 309, a flocculant injection pipe 310, a third connecting pipe 311, a sewage purification box 312, a delivery pump 313, an oil-water separation cavity 314, a sewage purification cavity 315, a fixing plate 316, an oil-water separation tank 317, a sewage diversion pipe 318, a sewage diversion head 319, an oil-water separation filter paper 320, a leak plate 321, a liquid collecting cover 322, and a third connecting pipe 311. Four connecting pipes 323, ultraviolet disinfection lamps 324 and drain pipes 325, a second connecting pipe 301 is fixedly installed at the bottom of the filter box 202, a mixing box 302 is fixedly installed at the bottom of the second connecting pipe 301, a motor 303 is fixedly installed on the left side of the mixing box 302, a drive box 304 is fixedly installed on the inner left wall of the mixing box 302, the inner rotatable connection of the drive box 304 is connected to a transmission wheel 305, a transmission belt 306 is movably installed on the outside of the transmission wheel 305, a mixing rod 307 is rotatably connected to the inner part of the mixing box 302, and a flocculant storage box 308 is fixedly installed on the right side of the filter box 202. The flocculant storage box 308 is provided with a sewage flocculant 309, a flocculant injection pipe 310 is fixedly installed at the bottom of the flocculant storage box 308, a third connecting pipe 311 is fixedly installed on the right side of the mixing box 302, a sewage purification box 312 is installed at the end of the third connecting pipe 311 away from the mixing box 302, a delivery pump 313 is fixedly installed inside the sewage purification box 312, an oil-water separation cavity 314 and a sewage purification cavity 315 are provided inside the sewage purification box 312, a fixing plate 316 is installed inside the oil-water separation cavity 314, and an oil-water separation is installed at the bottom of the fixing plate 316. Tank 317, a sewage diversion pipe 318 is installed at the bottom of the fixed plate 316, a number of sewage diversion heads 319 are installed outside the sewage diversion pipe 318, an oil-water separation filter paper 320 is installed inside the oil-water separation tank 317, a leak plate 321 is fixedly installed at the bottom of the oil-water separation tank 317, a liquid collecting cover 322 is fixedly installed inside the oil-water separation cavity 314, a fourth connecting pipe 323 is fixedly installed at the bottom of the liquid collecting cover 322, an ultraviolet disinfection lamp 324 is fixedly installed inside the sewage purification cavity 315, and a drain pipe 325 is fixedly installed on the right side of the sewage purification box 312.

[0033] Specifically, the sewage is first pretreated, and this process is performed by the pretreatment system 1. When the sewage enters the pretreatment box 101 through the sewage injection pipe 102, the cover 103 remains closed to prevent the spread of odor. The sewage first enters the grid structure 104, which is composed of a first grid with a spacing of 10-20mm and a second grid with a spacing of 3-5mm. It is used to intercept larger solid waste, such as plastic bags, wood chips, etc., to prevent these substances from clogging subsequent treatment equipment. The sewage after preliminary cleaning will then flow into the filter box 202 for further purification. This link is crucial to improving the efficiency of the entire system, because reducing the content of coarse suspended solids can significantly reduce the pressure of subsequent treatment steps and ensure that the discharged water quality meets high standards.

[0034] Specifically, the sewage flowing out of the pretreatment system 1 enters the filter box 202 through the first connecting pipe 201, and is evenly distributed in the box under the action of the water distribution plate 203. Then, the sewage passes through the quartz sand filter filler layer 205 located below the water distribution plate 203, and finally passes through the mesh plate 204. The quartz sand has good physical and chemical stability and high mechanical strength, and can effectively remove fine particles and some organic matter in the water to further purify the water quality. In addition, regular replacement or cleaning of the quartz sand filling material is one of the key measures to ensure the long-term stable operation of the system. After the filtration is completed, the clearer water flows to the next processing unit-the water-oil separation purification system 3.

[0035] Specifically, the liquid from the filter box 202 enters the mixing box 302 through the second connecting pipe 301. During this process, the sewage flocculant 309 in the flocculant storage box 308 is added into the mixing box 302 through the flocculant injection pipe 310. The motor 303 drives the mixing rod 307 to rotate, causing the particles to aggregate to form larger sediments for subsequent separation. Afterwards, the treated liquid continues to flow to the sewage purification tank 312. In the oil-water separation tank 317, the oil substances and sediment impurities are separated from the water through the oil-water separation filter paper 320; and the ultraviolet disinfection lamp 324 is used to kill residual bacteria to ensure the safety of the final discharge.

[0036] Specifically, when the wastewater containing oil enters the oil-water separation tank 317, a specially designed oil-water separation filter paper 320 is installed inside it, which can efficiently capture and separate the oil droplets. At the same time, the wastewater diversion pipe 318 and its branch - the wastewater diversion head 319 help to achieve a more uniform water flow distribution and promote the effective separation of the oil and water phases. Finally, the separated clean water is collected by the liquid collection cover 322 and sent to the next treatment stage with the help of the fourth connecting pipe 323.

[0037] Specifically, an ultraviolet disinfection lamp 324 is installed in the sewage purification cavity 315 of the sewage purification box 312. This is a highly efficient sterilization method, which is particularly suitable for eliminating pathogenic microorganisms that are difficult to remove by physical filtration. The specific wavelength of light emitted by the ultraviolet disinfection lamp 324 can destroy the DNA structure of microorganisms such as bacteria and viruses, and prevent their reproduction ability, thereby achieving the purpose of disinfection. In order to ensure the best disinfection effect, the working status of the ultraviolet lamp should be checked regularly, and aging or damaged lamps should be replaced in time when necessary. In addition, in actual operation, attention should be paid to protecting staff from harm from ultraviolet radiation, such as wearing safety equipment such as protective glasses. The clean water after ultraviolet disinfection can be discharged through the drain pipe 325 for reuse or directly discharged into natural water bodies.

[0038] In summary, the port's environmentally friendly sewage treatment and recycling system can effectively intercept larger solid wastes in sewage through the grid structure 104 in the pretreatment system 1, preventing these substances from entering the subsequent treatment link. Subsequently, the sewage after preliminary cleaning flows into the filter box 202, and the coarse suspended matter is further removed by using the quartz sand filter filler 205. This process significantly reduces the suspended matter content in the sewage, alleviates the pressure of subsequent treatment steps, ensures that the discharged water quality meets high standards, and thus protects the water ecosystem from the harm of pollutants.

[0039] Moreover, in the port environmentally friendly sewage treatment and recycling system, in the water-oil separation purification system 3, a sewage flocculant 309 is added to the mixing box 302, and the mixing rod 307 is used to promote the aggregation of particles to form larger sediments for easy separation. The oil-water separation filter paper 320 inside the oil-water separation tank 317 efficiently separates oil substances and sediment impurities from water. In addition, the ultraviolet disinfection lamp 324 is used for sterilization and disinfection to ensure that the final discharged water quality is safe and harmless. This design avoids the eutrophication of water bodies caused by the direct discharge of oily wastewater into natural water bodies, while reducing the risk of the spread of pathogenic microorganisms, ensuring the safety of human health and the surrounding ecological environment, and solving the problem that if the harmful substances in the port sewage are not properly treated and are discharged at will, they will gradually accumulate in the water body organisms. With the transmission of the food chain, it will eventually pose a serious threat to human health. At the same time, the ecological environment around the port will also be severely damaged by the discharge of sewage, such as causing eutrophication of water bodies, causing sediment pollution and a series of other problems.

[0040] 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. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0041] Although 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 port environment-friendly sewage treatment and recycling system, characterized by: It comprises a pretreatment system (1), a sewage filtration system (2) and a water-oil separation and purification system (3); The pretreatment system (1) comprises a pretreatment box (101), a sewage injection pipe (102), a cover plate (103) and a grille structure (104); the sewage injection pipe (102) is fixedly installed on the outside of the pretreatment box (101); the cover plate (103) is movably installed on the top of the pretreatment box (101); and the grille structure (104) is movably installed inside the pretreatment box (101); The sewage filtration system (2) comprises a first connecting pipe (201), a filter box (202), a water distribution plate (203), a mesh plate (204) and a quartz sand filter filler (205); the first connecting pipe (201) is fixedly mounted on the bottom of the pretreatment box (101); the filter box (202) is fixedly mounted on the bottom of the first connecting pipe (201); the water distribution plate (203) is fixedly mounted on the inner top wall of the filter box (202); the mesh plate (204) is mounted inside the filter box (202); and the top of the mesh plate (204) is provided with a quartz sand filter filler (205).

2. The port environment-friendly sewage treatment and recycling system according to claim 1 is characterized by: The oil-water separation and purification system (3) comprises a second connecting pipe (301), a mixing box (302), a motor (303), a driving box (304), a transmission wheel (305), a transmission belt (306), a mixing rod (307), a flocculant storage box (308), a sewage flocculant (309), a flocculant injection pipe (310), a third connecting pipe (311), a sewage purification box (312), a delivery pump (313), an oil-water separation cavity (314), a sewage purification cavity (315), a fixing plate (316), an oil-water separation tank (317), a sewage diversion pipe (318), a sewage diversion head (319), an oil-water separation filter paper (320), a leak plate (321), a liquid collecting cover (322), a fourth connecting pipe (3 23), an ultraviolet disinfection lamp (324) and a drain pipe (325), a second connecting pipe (301) is fixedly installed at the bottom of the filter box (202), a mixing box (302) is fixedly installed at the bottom of the second connecting pipe (301), a motor (303) is fixedly installed on the left side of the mixing box (302), a drive box (304) is fixedly installed on the inner left wall of the mixing box (302), the interior of the drive box (304) is rotatably connected to a transmission wheel (305), a transmission belt (306) is movably installed on the outside of the transmission wheel (305), a mixing rod (307) is rotatably connected to the interior of the mixing box (302), a flocculant storage box (308) is fixedly installed on the right side of the filter box (202), the A sewage flocculant (309) is arranged inside the flocculant storage box (308), a flocculant injection pipe (310) is fixedly installed at the bottom of the flocculant storage box (308), a third connecting pipe (311) is fixedly installed on the right side of the mixing box (302), a sewage purification box (312) is installed at the end of the third connecting pipe (311) away from the mixing box (302), a delivery pump (313) is fixedly installed inside the sewage purification box (312), an oil-water separation cavity (314) and a sewage purification cavity (315) are arranged inside the sewage purification box (312), a fixing plate (316) is installed inside the oil-water separation cavity (314), and an oil-water separation tank is installed at the bottom of the fixing plate (316). (317), a sewage diversion pipe (318) is installed at the bottom of the fixed plate (316), and a plurality of sewage diversion heads (319) are installed outside the sewage diversion pipe (318). An oil-water separation filter paper (320) is installed inside the oil-water separation tank (317). A leak plate (321) is fixedly installed at the bottom of the oil-water separation tank (317). A liquid collecting cover (322) is fixedly installed inside the oil-water separation cavity (314), and a fourth connecting pipe (323) is fixedly installed at the bottom of the liquid collecting cover (322). An ultraviolet disinfection lamp (324) is fixedly installed inside the sewage purification cavity (315), and a drain pipe (325) is fixedly installed on the right side of the sewage purification tank (312).

3. The port environment-friendly sewage treatment and recycling system according to claim 1 is characterized by: A fixing ring is fixedly installed on the outside of the pretreatment box (101), and four threaded rods are rotatably connected inside the cover plate (103), and the bottoms of the four threaded rods are threadedly connected to the fixing ring. Sewage injection pipes (102) are fixedly installed on both the left and right sides of the pretreatment box (101).

4. The port environment-friendly sewage treatment and recycling system according to claim 1 is characterized by: The grid structure (104) is composed of a first grid with a spacing of 10-20 mm and a second grid with a spacing of 3-5 mm. The bottom of the first connecting pipe (201) is connected to the water distribution plate (203), and the quartz sand filter filler (205) is located at the bottom of the water distribution plate (203).

5. The port environment-friendly sewage treatment and recycling system according to claim 2 is characterized by: The top and bottom of the second connecting pipe (301) extend to the interior of the filter box (202) and the interior of the mixing box (302) respectively. There are two transmission wheels (305), and the two transmission wheels (305) are connected to each other via a transmission belt (306).

6. The port environment-friendly sewage treatment and recycling system according to claim 2 is characterized by: The output end of the motor (303) is fixedly connected to one of the transmission wheels (305), and a mixing rod (307) is fixedly installed on the right side of the two transmission wheels (305). The bottom of the flocculant injection pipe (310) extends to the inside of the mixing box (302) and is installed with a control valve.

7. The port environment-friendly sewage treatment and recycling system according to claim 2 is characterized by: One end of the third connecting pipe (311) away from the mixing box (302) is connected to a delivery pump (313), and a delivery pipe connected to the top of the sewage diversion pipe (318) is fixedly installed at the bottom of the delivery pump (313).

8. The port environment-friendly sewage treatment and recycling system according to claim 2 is characterized by: The oil-water separation filter paper (320) is located between the inner wall of the oil-water separation tank (317) and the outer surface of the sewage diversion pipe (318), and the bottom of the fourth connecting pipe (323) extends to the interior of the sewage purification cavity (315).

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