Marine sewage disposal and discharge device

Abstract

The invention discloses an ocean sewage disposal and discharge device, and belongs to the technical field of sewage treatment devices. The device comprises a main pipeline and a plurality of discharge pipes which are laterally connected, wherein the top of each discharge pipe is connected with a spray pipe through an ascending pipe. A gate valve and a centrifugal pump are arranged in each discharge pipe, the controller integrates a current meter, an ultrasonic fish-driving transducer and an alarm, the controller dynamically adjusts the power of the centrifugal pump by monitoring the ocean current speed in real time, and the discharge flow speed is optimized to be matched with ocean current movement. When water flow in a local sea area is abnormal, the system automatically closes a fault discharge pipe and intelligently distributes sewage to other normal pipe orifices for discharge, and an acoustic protection barrier is formed by cooperating with ultrasonic wave fish driving. According to the device, the initial dilution degree of sewage is stabilized to be higher than 55, instantaneous contact between fishes and high-concentration pollutants is effectively blocked, enrichment of the pollutants in organisms is reduced, and the device has anti-backflow, anti-blocking and corrosion-resistant properties and is suitable for ecological safe discharge in a deep-sea high-pressure environment.

Description

Technical Field

[0001] The present invention belongs to the technical field of sewage treatment devices, and in particular relates to a sewage ocean disposal and discharge device. Background Art

[0002] With the development of coastal cities, marine disposal of sewage has become an important means to alleviate the pressure of land pollution, and many marine sewage discharge devices have emerged. For example, CN218374281U is a deep-sea discharge diffuser that can effectively discharge sewage. However, traditional discharge devices mostly adopt a single-tube diffusion mode with a fixed flow rate, which has significant technical defects: under complex ocean current conditions, the discharge port is susceptible to the impact of seawater backflow, causing pipeline blockage, and it is impossible to dynamically adjust the discharge parameters according to hydrodynamic conditions. Insufficient dilution in local areas often causes pollutant enrichment. Studies have shown that under traditional discharge methods, the initial dilution of sewage fluctuates by 40%-120%. In some cases, plumes have risen to the surface of the ocean, causing acute fish poisoning. In addition, persistent pollutants accumulate in organisms, significantly exacerbating ecological risks.

[0003] In the existing technology, mechanical check valves are prone to sealing failure under the condition of alternating two-way pressure of seawater. Statistics show that the leakage rate of conventional gate valves is as high as 17% when the reverse flow is 6m / s. In terms of biological protection, passive grid barrier devices not only cause 28%-35% head loss, but also have the risk of secondary release of pollutants during maintenance.

[0004] The Pollution Control Standard for Marine Wastewater Disposal Projects (GB 18486-2001) requires that the initial dilution of discharge in most sea areas be ≥35, which puts higher requirements on the fluid dynamics design and intelligent control of the discharge system. The active fish-driving technology developed in recent years mostly relies on visible light or bubble curtains, and its efficiency in turbid seawater is less than 42%. Therefore, it is urgent to develop a deep-sea discharge device with multifunctional integration such as sea current adaptation, anti-backflow enhanced sealing, and intelligent biological protection to achieve coordinated control of the pollutant diffusion process and marine ecological protection. Summary of the invention

[0005] The purpose of the present invention is to provide an intelligently regulated sewage marine disposal discharge device, which optimizes sewage diffusion effects by dynamically regulating discharge parameters, preventing seawater backflow and actively driving away fish schools, thereby effectively reducing the short-term impact and long-term cumulative impact of pollutants on the marine ecosystem.

[0006] A sewage ocean disposal discharge device includes a main pipeline, a discharge pipe connected to the side of the main pipeline, a riser connected to the top of the discharge pipe, a nozzle connected to the side of the riser, a gate valve in each discharge pipe, a gradually expanding channel in the gate valve near the riser, a centrifugal pump in the discharge pipe on the side of the gate valve near the main pipeline, a motor of the centrifugal pump connected to a controller, and a flow meter, an ultrasonic fish-repelling transducer and an alarm built into the controller. This device optimizes the sewage discharge power configuration and biological protection mechanism, while achieving sewage stratification and diffusion, and constructs a fish contact barrier system. By combining active expulsion with physical isolation, instantaneous contact between fish and high-concentration pollutants is blocked to avoid acute poisoning. A dynamically regulated dilution discharge mode is adopted to reduce the continuous exposure concentration of pollutants in the water body, reduce the bioaccumulation effect of pollutants in fish, and inhibit chronic toxicological damage.

[0007] After pre-treatment, sewage flows into the main pipeline. The centrifugal pump continuously pumps water out of the main pipeline. Under the action of the centrifugal pump, the water flows into each discharge pipe, and then flows out from the nozzle of the riser to diffuse the sewage. Under normal working conditions, the centrifugal pump ensures that the flow rate is always higher than the critical suspension velocity of sediment to prevent particle sedimentation. The riser lifts the sewage from the bottom pipe or vertically to the preset discharge height to promote diffusion by natural water flow, and adjusts the height according to the stratification of the water body so that the sewage enters the optimal dilution layer. The nozzle is a multi-hole array (6 to 8 small-aperture nozzles distributed along the center line to the outer circumference), which increases local shear force by diverting flow and reduces the risk of single-hole blockage. The gate valve only allows sewage to flow from the main pipeline into the discharge pipe, and its structure can effectively prevent seawater backflow.

[0008] The entire device is placed in the ocean, and controllers are installed on each discharge pipe. The controller has a safe discharge flow rate value for the ocean water flow. The water flow rate in the ocean will change continuously. When the water flow rate is too high, part of the seawater may flow back into the nozzle and riser. When the flow meter in the controller detects that the water flow rate around the corresponding pipeline is too high, it will first increase the pumping speed of the centrifugal pump in the corresponding pipeline. If the water flow rate is detected to be too high, the seawater backflow speed is much higher than the maximum pumping speed of the centrifugal pump in the corresponding discharge pipe. At this time, the gradual expansion channel and gate valve will work to effectively prevent seawater from backflowing into the main pipeline. In another case, when the flow meter in the controller detects that the water flow rate around the corresponding pipeline is too low, the sewage discharged from the corresponding pipeline may have the risk of sewage enrichment, and it is necessary to reduce the pumping power of the centrifugal pump in the discharge pipe.

[0009] The gradual expansion channel can reduce the turbulence effect of high-speed fluid, and the angle α of the gradual expansion channel is between 40° and 50°. The gradual expansion channel plays a certain buffering role in the impact of seawater backflow on the gate valve surface. The combined structure of the graded gradual expansion channel and the adjustable nozzle is adopted, and the intelligent power regulation of the centrifugal pump is used to optimize the discharge flow rate to match the movement of the ocean current. When the ambient flow rate fluctuates, the controller compensates the pumping pressure in real time to keep the initial dilution of the sewage stable at more than 55, ensuring that the discharge plume completes the primary mixing with the seawater in a short time, so that the peak concentration of pollutants is always lower than 0.05 of the 96-hour half-lethal concentration (LC50) of fish.

[0010] The corresponding controller on each discharge pipe is controlled by the same control system. If the gate valve in the corresponding pipeline is closed to prevent seawater backflow, the centrifugal pump of the corresponding discharge pipe is closed, and the corresponding discharge pipe will no longer drain water. It is necessary to wait until the external seawater flow rate decreases to the safe discharge flow rate value before restarting the centrifugal pump. If the controllers of the remaining discharge pipes detect that the seawater flow rate at the discharge location is relatively small, the pumping power of the centrifugal pump in the corresponding discharge pipe can be increased to pump water from the main pipe to the discharge pipe location with relatively good diffusion conditions for sewage diffusion to prevent sewage from accumulating in the main pipe.

[0011] Through the multi-channel diversion design and gate valve interlocking mechanism, a pollutant spatiotemporal distribution control system is established. When unfavorable diffusion conditions appear in local sea areas (the seawater flow velocity is too low to be conducive to discharge, and there is a risk of seawater backflow), the control system automatically directs the sewage to the discharge pipe suitable for diffusion, avoiding the formation of pollution-enriched areas in local areas, and significantly weakening the amplification effect of pollutants in the marine food chain.

[0012] The ultrasonic fish-repelling transducer built into the controller is used to disperse the surrounding fish schools, preventing fish from entering the sewage discharge area through non-physical contact, and reducing the harm of pollutants to aquatic organisms. Through the synergy of the ultrasonic fish-repelling transducer and the dynamic adjustment system of the device, an acoustic protection barrier is formed around the discharge port. When the fish school is detected approaching, the fish-repelling transducer emits ultrasonic waves of a specific frequency to force the fish to actively avoid it, eliminating the risk of acute contact from a behavioral level.

[0013] A sewage ocean disposal discharge device, the gate valve includes a valve disc and a circular tube, and the valve disc and the circular tube are rotatably connected by a flexible hinge. In the working state, sewage flows from the main pipe into the circular tube, and the water flow impacts the side of the valve disc close to the main pipe to open the valve disc and flow into the riser. The flexible hinge is made of a material softer than the valve disc, and allows the valve disc to swing freely when the fluid pressure changes through elastic deformation. When the water pressure in the main pipe is greater than the water pressure in the discharge pipe, the pressure pushes the valve disc to rotate around the hinge to the side of the riser to open the flow channel. When the water pressure difference in the discharge section of the discharge pipe at the bottom of the riser is greater than the water pressure in the main pipe, the hinge rebounds and drives the valve disc to reset, and the valve disc is sealed against the bottom of the groove to prevent the water pressure of the discharge pipe from flowing back into the main pipe. The gate valve has a leakage rate of less than 5% under 6m / s reverse flow, which is significantly better than the 17% leakage level of traditional mechanical valves.

[0014] A sewage ocean disposal discharge device, wherein the valve disc body is an elliptical disc structure, and the circumferential edge of the elliptical disc structure has a semicircular arc bottom plate bent outward. The circular tube is composed of a circular tube body and a semicircular arc track, and the semicircular arc track extends axially along the circular tube body, and the inner arc surface of the semicircular arc track can fit with the outer arc surface of the semicircular arc bottom plate. The side of the pipeline where the semicircular arc bottom plate of the valve disc is located is called the downstream, and the side of the valve disc close to the main pipeline is called the upstream. When the downstream pressure is greater than the upstream pressure (when seawater is backflowing), under the action of the downstream pressure, the semicircular arc bottom plate will fit tightly against the semicircular arc track to form a sealing structure to prevent downstream seawater from flowing into the main pipeline.

[0015] A sewage marine disposal discharge device, the valve disc and round tube are made of titanium alloy. Titanium alloy can effectively resist chloride ion corrosion in seawater, especially pitting and crevice corrosion. At the same time, it remains stable in sewage containing sulfide, acidic or alkaline substances, avoiding structural failure caused by chemical corrosion. The strength of titanium alloy is close to that of high-strength steel, but the density is only about 60% of that of steel, which is convenient for constructing lightweight structures in deep-sea high-pressure environments, reducing the difficulty of transportation and installation, and can maintain structural integrity for a long time in deep-sea high-pressure environments, reducing the risk of deformation.

[0016] A sewage ocean disposal discharge device, with corrugated grooves on the surface of one side of the elliptical disc structure close to the main pipe. The corrugated groove structure guides the water flow to form vortices, reduce the laminar boundary layer, reduce flow resistance, and increase the sewage discharge speed. The concave and convex surface of the corrugation can accelerate local turbulence, flush sediments, reduce the risk of sludge accumulation and blockage in sewage, and disperse external pressure such as deep-sea high pressure or mechanical load through geometric shapes, significantly improving the pressure resistance. The number of corrugated grooves is at least 6.

[0017] A sewage ocean disposal discharge device, the end of the discharge pipe is provided with a circular arc return surface. After the sewage enters the discharge pipe from the main pipeline, it impacts the end of the discharge pipe, and the circular arc return surface can make the sewage return and finally guide it to the riser for discharge.

[0018] A sewage ocean disposal and discharge device, a pressure sensor is embedded inside the valve disc, and the pressure sensor can be electrically connected to the controller. The pressure sensor is used to detect the pressure applied to the surface of the valve disc when the downstream seawater flows back. When the detected pressure value is found to be too large, the alarm in the controller can sound an alarm, and the maintenance personnel can come to perform inspection and maintenance. When the detected pressure value drops to a safe range, the centrifugal pump can be restarted to discharge sewage.

[0019] The advantages of the present invention are: through real-time monitoring by the flow meter and dynamic adjustment of the centrifugal pump power, the initial dilution of sewage is ensured to be stable ≥55, and the discharge flow rate is ensured to be continuously higher than the critical suspension velocity of sediment; combined with the design of gradual expansion fluid optimization, titanium alloy flexible gate valve sealing and corrugated groove turbulent scouring, the discharge of the pipeline is smooth with the early warning of the pressure sensor. The leakage rate is less than 5% under 6m / s reverse flow, which is significantly better than the 17% leakage level of traditional mechanical valves; at the same time, the ultrasonic fish-repelling transducer and the multi-channel redundant shunt design work together, and the titanium alloy valve body and corrugated groove structure are 40% lighter, which comprehensively improves the ecological safety of sewage marine disposal from diffusion control, biological protection to material performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0021] Figure 1 It is the external schematic diagram of the overall device of the present invention.

[0022] Figure 2 Schematic diagram of the interior of the discharge pipe of the present invention.

[0023] Figure 3 It is a schematic diagram of the gate valve of the present invention.

[0024] Figure 4 It is a schematic diagram of the fitting of the circular tube structure and the gate valve of the present invention.

[0025] Figure 5 It is a schematic diagram of the valve flap of the present invention.

[0026] Figure 6 It is a schematic diagram of the corrugated surface of the valve flap of the present invention.

[0027] Figure 7 This is a schematic diagram of Example 1 of the present invention.

[0028] Description of the drawings: 11-main pipeline, 12-discharge pipe, 13-riser pipe, 14-nozzle, 3-gate valve, 4-controller, 5-centrifugal pump, 31-flexible hinge, 32-valve disc, 33-circular pipe, 121-circular arc return surface, 122-gradually expanding channel, 321-corrugated groove, 322-semicircular arc bottom plate, 323-elliptical disk structure, 331-circular pipe body, 332-semicircular arc track, 12a-first discharge pipe, 12b-second discharge pipe, 12c-third discharge pipe, 12d-fourth discharge pipe, 12e-fifth discharge pipe. DETAILED DESCRIPTION

[0029] 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.

[0030] Embodiment 1: See attached Figure 1 , Attachment Figure 2 As shown, a sewage ocean disposal discharge device includes a main pipeline 11, a discharge pipe 12 is connected to the side of the main pipeline 11, a riser 13 is connected to the top of the discharge pipe 12, and a nozzle 14 is connected to the side of the riser 13. A gate valve 3 is provided in each discharge pipe 12, and a gradually expanding channel 122 is provided on the side of the gate valve 3 near the riser 13. A centrifugal pump 5 is placed in the discharge pipe 12 on the side of the gate valve 3 near the main pipeline 11. The motor of the centrifugal pump 5 is connected to the controller 4, and the controller 4 is built with a flow meter, an ultrasonic fish-repelling transducer and an alarm. This device optimizes the sewage discharge power configuration and biological protection mechanism, and at the same time realizes the stratified diffusion of sewage, constructs a fish contact barrier system. By combining active expulsion with physical isolation, the instantaneous contact between fish and high-concentration pollutants is blocked to avoid acute poisoning. The dynamically regulated dilution discharge mode is adopted to reduce the continuous exposure concentration of pollutants in the water body, reduce the bioaccumulation effect of pollutants in fish, and inhibit chronic toxicological damage.

[0031] See attached Figure 1 , Attachment Figure 2As shown, the sewage flows into the main pipeline 11 after pre-treatment, and the centrifugal pump 5 continuously pumps water from the main pipeline 11. Under the action of the centrifugal pump 5, the water flows into each discharge pipe 12, and then flows out from the nozzle 14 of the riser 13 for sewage diffusion. The riser 13 lifts the sewage from the bottom pipeline or vertically to the preset discharge height to promote diffusion by natural water flow, and adjusts the height according to the stratification of the water body so that the sewage enters the optimal dilution layer. The nozzle 14 is a multi-hole array (6 to 8 small-aperture nozzles distributed circumferentially from the center line), which increases the local shear force by diverting the flow and reduces the risk of single-hole blockage. The gate valve 3 only allows sewage to flow from the main pipeline 11 into the discharge pipe 12, and its structure can effectively prevent seawater backflow.

[0032] See attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 As shown, the entire device is placed in the ocean, and a controller 4 is installed on each discharge pipe 12. The controller 4 has a safe discharge flow rate value for the ocean water flow, and the water flow speed in the ocean will change continuously. When the water flow speed is too high, part of the seawater may flow back into the nozzle 14 and the riser 13. When the flow meter in the controller 4 detects that the water flow speed around the corresponding pipeline is too high, the pumping speed of the centrifugal pump 5 in the corresponding pipeline will be increased first. If the water flow speed is detected to be too high, the seawater backflow speed is much greater than the maximum pumping speed of the centrifugal pump 5 in the corresponding discharge pipe 12. At this time, the gradual expansion channel 122 and the gate valve 3 work, which can effectively prevent seawater from backflowing into the main pipeline 11. In another case, when the flow meter in the controller 4 detects that the water flow speed around the corresponding pipeline is too low, the sewage discharged from the corresponding pipeline may have the risk of sewage enrichment, and it is necessary to reduce the pumping power of the centrifugal pump 5 in the discharge pipe 12.

[0033] See attached Figure 2 As shown, the gradually expanding channel 122 can reduce the turbulent effect of high-speed fluid, and the angle α of the gradually expanding channel 122 is between 40° and 50°. The gradually expanding channel 122 plays a certain buffering role in the impact of seawater backflow on the surface of the gate valve 3. The combined structure of the graded gradually expanding channel 122 and the adjustable nozzle 14 is adopted, and the intelligent power regulation of the centrifugal pump 5 is coordinated to achieve the dynamic matching of the discharge flow rate and the ocean turbulence. When the ambient flow rate fluctuates, the controller 4 compensates the pumping pressure in real time, and according to the "Pollution Control Standard for Sewage Marine Disposal Project (GB 18486-2001)", the initial dilution degree of sewage is stably maintained above 55, ensuring that the discharge plume completes the primary mixing with seawater in a short time, so that the peak concentration of pollutants is always lower than 1 / 5 of the 96-hour half-lethal concentration (LC50) of fish.

[0034] See attached Figure 1 , Attachment Figure 2As shown, the corresponding controller 4 on each discharge pipe 12 is controlled by the same control system. If the gate valve 3 in the corresponding pipeline is closed to prevent seawater backflow, the centrifugal pump 5 of the corresponding discharge pipe 12 is closed at this time, and the corresponding discharge pipe 12 is no longer drained. It is necessary to wait until the external seawater flow velocity decreases to the safe discharge flow rate value before re-opening the centrifugal pump 5. If the controller 4 of the remaining discharge pipes 12 detects that the seawater flow velocity at the discharge position is relatively small at this time, the pumping power of the centrifugal pump 5 in the corresponding discharge pipe 12 can be increased to extract the water of the main pipeline 11 to the position of the discharge pipe 12 with relatively good diffusion conditions for sewage diffusion, so as to prevent sewage from accumulating in the main pipeline 11. Through the multi-channel diversion design and the interlocking mechanism of the gate valve 3, a control system for the spatiotemporal distribution of pollutants is established. When unfavorable diffusion conditions occur in the local sea area (the seawater flow velocity is too small to be conducive to discharge, and there is a risk of seawater backflow), the control system automatically directs the sewage to the discharge pipe 12 suitable for diffusion, avoiding the formation of pollution enrichment areas in the local area, and significantly weakening the amplification effect of pollutants in the marine food chain.

[0035] For further information, see Attachment Figure 7 As shown, the discharge pipes 12 from left to right are the first discharge pipe 12a, the second discharge pipe 12b, the third discharge pipe 12c, the fourth discharge pipe 12d, and the fifth discharge pipe 12e. If the first discharge pipe 12a detects that the seawater flow is too large at its location, seawater will flow back into the first discharge pipe 12a. At this time, the gate valve 3 and the centrifugal pump 5 in the first discharge pipe 12a are in a closed state. If it is detected at the fifth discharge pipe 12e that the relative seawater flow speed is small, the pumping power of the centrifugal pump 5 of the fifth discharge pipe 12e can be increased to prevent sewage accumulation in the main pipeline 11 due to the first discharge pipe 12a not being in a working state. Similarly, when the second discharge pipe 12b detects that the seawater flow is too large and causes seawater backflow, if the controller 4 in any of the third discharge pipe 12c, the fourth discharge pipe 12d, and the fifth discharge pipe 12e detects that the water flow rate is low, the discharge power of the centrifugal pump 5 in the corresponding pipe can be increased, and the sewage discharge in the main pipe 11 can be dynamically adjusted by the controller 4, effectively ensuring the smooth discharge of sewage in the main pipe 11, and preventing sewage from being blocked in the main pipe 11 due to seawater backflow in individual discharge pipes 12. The ultrasonic fish-repelling transducer built into the controller 4 disperses the surrounding fish, prevents fish from entering the sewage discharge area by non-physical contact, and reduces the harm of pollutants to aquatic organisms.

[0036] Optional, see attached Figure 7As shown, the discharge pipes 12 from left to right are the first discharge pipe 12a, the second discharge pipe 12b, the third discharge pipe 12c, the fourth discharge pipe 12d, and the fifth discharge pipe 12e. If the first discharge pipe 12a detects that the seawater flow at the location is too small or even lower than the safe discharge flow rate value, the centrifugal pump 5 may have the risk of insufficient diffusion of sewage when it continues to work at the original power. The controller 4 can reduce the pumping speed of the centrifugal pump 5 of the first discharge pipe 12a, so that the sewage discharge speed in the area corresponding to the first discharge pipe 12a is slowed down, effectively preventing the risks brought to marine life by the pollution enrichment area. At this time, if the seawater flow at the location of any of the second discharge pipe 12b, the third discharge pipe 12c, the fourth discharge pipe 12d, and the fifth discharge pipe 12e is at the safe discharge flow rate value, the discharge power of the centrifugal pump 5 of the pipeline can be appropriately increased to prevent sewage blockage in the main pipeline 11.

[0037] See attached Figure 1 As shown, the ultrasonic fish-repelling transducer built into the controller 4 is used to disperse the surrounding fish schools, prevent fish from entering the sewage discharge area by non-physical contact, and reduce the harm of pollutants to aquatic organisms. Through the synergy of the ultrasonic fish-repelling transducer and the dynamic adjustment system of the device, an acoustic protection barrier is formed around the discharge port. When the approach of the fish school is detected, the fish-repelling transducer emits ultrasonic waves of a specific frequency to force the fish to actively avoid it, eliminating the risk of acute contact from a behavioral level.

[0038] See attached Figure 1 , Attachment Figure 2 As shown, a sewage ocean disposal discharge device, the gate valve 3 includes a valve flap 32 and a circular tube 33, and the valve flap and the circular tube 33 are rotatably connected by a flexible hinge 31. In the working state, sewage flows from the main pipe 11 into the circular tube 33, and the water flow impacts the side of the valve flap 32 close to the main pipe 11, so that the valve flap 32 opens and flows into the riser 13. The flexible hinge 31 is made of a material softer than the valve flap 32, and allows the valve flap 32 to swing freely when the fluid pressure changes through elastic deformation. When the water pressure in the main pipe 11 is greater than the water pressure in the discharge pipe 12, the pressure pushes the valve flap 32 to rotate around the hinge to the side of the riser 13, opening the flow channel. When the water pressure difference in the discharge section of the discharge pipe 12 at the bottom of the riser 13 is greater than the water pressure in the main pipe 11, the hinge rebounds and drives the valve flap 32 to reset, and the valve flap 32 is sealed against the bottom of the groove to prevent the water pressure of the discharge pipe 12 from flowing back into the main pipe 11. The leakage rate of gate valve 3 under 6m / s reverse flow is less than 5%, which is significantly better than the 17% leakage level of traditional mechanical valves.

[0039] See attached Figure 5 As shown, a sewage ocean disposal discharge device, the valve flap 32 main body is an elliptical disc structure 323, and the circumferential edge of the elliptical disc structure 323 has a semicircular arc bottom plate 322 bent outward.

[0040] See attached Figure 4 , Attachment Figure 5 As shown, a sewage ocean disposal discharge device, the circular pipe 33 is composed of a circular pipe body 331 and a semicircular track 332, the semicircular track 332 extends axially along the circular pipe body 331, and the inner arc surface of the semicircular track 332 can fit with the outer arc surface of the semicircular bottom plate 322. The side of the pipeline where the semicircular bottom plate 322 of the valve flap 32 is located is called the downstream, and the side of the valve flap 32 close to the main pipeline 11 is called the upstream. When the downstream pressure is greater than the upstream (when seawater flows back), under the action of the downstream pressure, the semicircular bottom plate 322 will fit tightly with the semicircular track 332 to form a sealing structure to prevent downstream seawater from flowing into the main pipeline 11.

[0041] See attached Figure 3 As shown, a sewage marine disposal discharge device, the valve disc 32 and the round tube 33 are made of titanium alloy. Titanium alloy can effectively resist chloride ion corrosion in seawater, especially pitting corrosion and crevice corrosion. At the same time, it remains stable in sewage containing sulfides, acidic or alkaline substances, avoiding structural failure caused by chemical corrosion. The strength of titanium alloy is close to that of high-strength steel, but the density is only about 60% of that of steel, which is convenient for constructing lightweight structures in deep-sea high-pressure environments, reducing the difficulty of transportation and installation, and can maintain structural integrity for a long time in deep-sea high-pressure environments, reducing the risk of deformation.

[0042] See attached Figure 6 As shown, a sewage ocean disposal discharge device, an elliptical disc structure 323 is provided with a corrugated groove 321 on the surface of one side close to the main pipe 11. The corrugated groove 321 structure guides the water flow to form a vortex, reduce the laminar boundary layer, reduce the flow resistance, and increase the sewage discharge speed. The concave and convex surface of the corrugation can accelerate local turbulence, flush sediments, reduce the risk of sludge accumulation and blockage in sewage, and disperse external pressure such as deep-sea high pressure or mechanical load through geometric shapes, significantly improving the pressure resistance. The number of corrugated grooves 321 is at least 6.

[0043] See attached Figure 1 As shown, a sewage ocean disposal discharge device has a circular arc return surface 121 at the end of the discharge pipe 12. After the sewage enters the discharge pipe 12 from the main pipeline 11, it impacts the end of the discharge pipe 12. The circular arc return surface 121 can make the sewage return and finally guide to the riser 13 for discharge.

[0044] See attached Figure 3 , Figure 5 As shown, a sewage ocean disposal and discharge device has a pressure sensor embedded inside the valve flap 32, and the pressure sensor can be electrically connected to the controller 4. The pressure sensor is used to detect the pressure applied to the surface of the valve flap 32 when the downstream seawater flows back. When the detected pressure value is found to be too large, the alarm in the controller 4 can sound an alarm, and the maintenance personnel can come to perform detection and maintenance. When the detected pressure value drops to a safe range, the centrifugal pump 5 can be restarted to discharge sewage.

[0045] It should also be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0046] The above embodiments and / or implementation methods are only used to illustrate the preferred embodiments and / or implementation methods for realizing the technology of the present invention, and are not intended to limit the implementation methods of the technology of the present invention in any form. Any technical personnel in this field may make slight changes to other equivalent embodiments without departing from the scope of the technical means disclosed in the content of the present invention, but they should still be regarded as technologies or embodiments that are essentially the same as the present invention.

[0047] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and its core ideas of this application. The above are only preferred implementation methods of this application. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of this application, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the invention to other occasions without improvement, should be regarded as the scope of protection of this application.

Claims

1. A sewage ocean disposal discharge device, comprising a main pipeline (11), a discharge pipe (12) connected to the side of the main pipeline (11), a riser (13) connected to the top of the discharge pipe (12), and a nozzle (14) connected to the side of the riser (13), characterized in that: The discharge pipe (12) is provided with a gate valve (3), and a gradually expanding channel (122) is provided in the discharge pipe (12) on the side of the gate valve (3) close to the riser (13). A centrifugal pump (5) is placed in the discharge pipe (12) on the side of the gate valve (3) close to the main pipeline (11), and the motor of the centrifugal pump (5) is connected to a controller (4), and the controller (4) has a flow meter, an ultrasonic fish-repelling transducer and an alarm built in.

2. A sewage ocean disposal discharge device according to claim 1, characterized in that: The gate valve (3) comprises a valve flap (32) and a circular tube (33), wherein the valve flap (32) and the circular tube (33) are rotatably connected via a flexible hinge (31).

3. A sewage ocean disposal discharge device according to claim 2, characterized in that: The circular tube (33) is composed of a circular tube body (331) and a semicircular arc track (332); the semicircular arc track (332) extends axially along the central axis of the circular tube body (331); and the inner arc surface of the semicircular arc track (332) fits the outer arc surface of the semicircular arc bottom plate (322).

4. A sewage ocean disposal discharge device according to claim 2, characterized in that: The valve flap (32) and the round tube (33) are made of titanium alloy.

5. The sewage ocean disposal discharge device according to claim 2, characterized in that: A pressure sensor is embedded in the valve flap (32), and the pressure sensor is electrically connected to the controller (4).

6. A sewage ocean disposal and discharge device according to claim 2, characterized in that: The valve flap (32) has an elliptical disc structure (323) as its main body, and the elliptical disc structure (323) has a semicircular arc bottom plate (322) bent outward on its circumferential edge.

7. A sewage ocean disposal and discharge device according to claim 6, characterized in that: The surface of the elliptical disc structure (323) on one side close to the main pipe (11) is provided with a corrugated groove (321).

8. The sewage ocean disposal and discharge device according to claim 7, characterized in that: The number of the corrugated grooves (321) is at least 6.

9. The sewage ocean disposal discharge device according to claim 1, characterized in that: The end of the discharge pipe (12) is provided with a circular arc return surface (121).

10. The sewage ocean disposal discharge device according to claim 1, characterized in that: The included angle α of the gradually expanding channel (122) is between 40° and 50°.

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