Dilution discharge device

Abstract

The application provides a dilution sewage device, which has a flow cavity for completing a dilution operation, a medium inlet and a medium outlet are arranged on the cavity of the flow cavity respectively, and a drainage port for introducing external fluid into the flow cavity is further arranged on the cavity; the medium inlet and the drainage port are both unidirectionally opened towards the flow cavity. The dilution sewage device can suck in external seawater under the action of internal and external pressure difference through the unidirectionally open drainage port, and meanwhile, the sewage is prevented from flowing out from the drainage port. In this way, the dilution treatment of the sewage with high concentration can be completed in the flow cavity, and then the sewage is discharged from the outlet. Therefore, the diluted water discharged from the outlet of the flow cavity can be reduced to the concentration required by the standard, so that the ecological environment of the surrounding sea area is not affected.

Description

Technical Field

[0001] This invention relates to the field of sewage pipeline technology, and specifically to a dilution sewage discharge device. Background Technology

[0002] For large-scale power plants, salt fields, and seawater desalination projects, the utilized water resources need to be discharged into the outside world. When these large-scale projects are located on the coast, seawater resources can be used directly, and the utilized water resources can be treated simply before being discharged into the deep sea.

[0003] Treatment of wastewater discharged into the sea is usually limited to ensuring that the composition of the discharged water does not exceed the standards required by GB3097. However, the temperature of the discharged water or the concentration of other components in the water may still be high. If it is discharged directly into the sea, it will disturb and affect the ecological environment of the mixed flow zone and the functional zones adjacent to the mixed flow zone.

[0004] In existing technologies, multiple diffusers distributed in a dispersed manner are generally used to reduce the impact of highly concentrated wastewater on the ecological environment of the mixing zone. However, it should be noted that the above method avoids the ecological impact of a large amount of wastewater on the same outlet location by dispersing the outflow, and accelerates the mixing speed of the outflow with the surrounding seawater through pre-dispersed outflow. Overall, the effect is improved, but since the mixing process cannot be completed instantaneously, the ecological impact of the outflow on the vicinity of the diffuser outlet is still significant. On the other hand, a large number of diffusers distributed in a dispersed manner occupy a relatively large sea area, which means that the sea area affected by the outflow is expanded. Summary of the Invention

[0005] In view of the fact that the existing marine drainage pipeline design still has a significant impact on the ecology of the outlet area and the overall affected area is relatively large, this invention provides a dilution and discharge device.

[0006] The present invention provides a dilution and sewage discharge device, which has a flow chamber for completing the dilution operation. The flow chamber is provided with a medium inlet and a medium outlet, and the flow chamber is also provided with a flow port for introducing external fluid into the flow chamber. The flow port opens unidirectionally toward the flow chamber.

[0007] Preferably, the cavity extends in a tubular shape, and a flow cavity is formed inside the pipe; one end of the cavity is connected to a medium inlet, which opens unidirectionally toward the flow cavity 1, and the other end is connected to a medium outlet; drainage ports are distributed on the cavity.

[0008] Preferably, both the medium inlet and the drain outlet are duckbill valves that open unidirectionally into the flow chamber.

[0009] Preferably, the drain port is inclined on the cavity towards the medium outlet side, and the inclination angle between the drain port and the radial direction of the cavity is 30 to 60°.

[0010] Preferably, the sealing opening of the drainage port is coplanar with the axis of the cavity.

[0011] Preferably, the diameter of the cavity gradually increases from the medium inlet to the medium outlet.

[0012] Preferably, the drainage ports are arranged in at least one row along the axis of the cavity, and at least one is arranged in the circumferential direction of the cavity.

[0013] Preferably, the drainage ports are staggered around the periphery of the cavity.

[0014] Preferably, the plurality of drainage ports are distributed along a spiral line on the cavity.

[0015] Preferably, the pitch of the helix gradually increases along the axis towards the medium outlet.

[0016] Preferably, the drainage ports are distributed only on 1 / 2 to 2 / 3 of the circumferential surface of the cavity.

[0017] The dilution and wastewater discharge device of this invention can draw in external seawater under the action of internal and external pressure difference through a unidirectional inlet in the flow chamber, while preventing wastewater from flowing out of the inlet. This allows for the dilution of the highly concentrated discharge liquid within the flow chamber before it is discharged from the outlet. Therefore, the diluted water discharged from the flow chamber outlet can be reduced to within the standard required concentration, keeping the ecological environment of the surrounding sea area unaffected. Attached Figure Description

[0018] Figure 1 This is a cross-sectional schematic diagram of the dilution and sewage discharge device of the present invention;

[0019] Figure 2 This is a schematic diagram of the installation of the drainage port of the present invention;

[0020] Figure 3 This is a schematic diagram of the dilution and sewage discharge device of the present invention;

[0021] Figure 4 This is another schematic diagram showing the distribution of the inlet of the dilution and sewage discharge device of the present invention;

[0022] Figure 5 This is a schematic diagram of the layout of the dilution and sewage discharge device of the present invention.

[0023] In the picture,

[0024] 1: Flow chamber; 13: Cavity; 11: Medium inlet; 12: Medium outlet; 2: Drainage port; 21: Sealing port; O: Axis; R: Radial. Detailed Implementation

[0025] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. In this specification, the dimensions of the drawings do not represent the actual dimensions. They are only used to illustrate the relative positional and connection relationships between the components. Components with the same name or the same reference numeral represent similar or identical structures and are limited to illustrative purposes.

[0026] like Figure 1 As shown, this invention aims to provide a dilution and sewage discharge device capable of internally diluting a medium (such as sewage to be discharged). The device has a flow chamber 1 for performing the dilution operation. The flow chamber 1 has a medium inlet 11 and a medium outlet 12 connected to the outside environment on its body 13. Additionally, the body 13 has a drain port 2 for introducing external fluids, such as seawater, into the flow chamber 1. The medium inlet 11 and drain port 2 are unidirectionally open towards the inside of the flow chamber 1. The medium outlet 12 can be open or unidirectionally open towards the outside of the flow chamber 1. The medium inlet 11 is connected to the outlet end of a drainage pipe and is submerged below the sea surface.

[0027] The above-mentioned dilution and sewage discharge device is installed submerged below the sea surface and far from the shoreline. This distance from the shoreline is primarily to minimize the impact on nearshore water quality. Its media inlet 11 connects to a drainage pipe. After being submerged below the sea surface, the media outlet 12 is immersed in seawater and connected to the surrounding seawater. Due to the presence of the inlet 2 and the media outlet 12, when not polluting, the flow chamber 1 can be filled with seawater flowing in through the inlet 2 and the media outlet 12 to balance the internal and external water pressure of the flow chamber 1. During pollution discharge, sewage flows into the flow chamber 1 from the media inlet 11, initially mixing and diluting with the existing seawater in the flow chamber 1 before flowing out from the media outlet 12. During the sewage outflow process, the pressure difference created by the sewage flow velocity at the inlet 2 draws seawater from the wide sea area outside the chamber 13 into the flow chamber 1, mixing it with the sewage flowing into the flow chamber 1 to achieve sewage dilution. The inlet 2, which flows in one direction inward, provides the seawater needed for dilution while preventing high-concentration sewage from leaking out of the flow chamber 1 and polluting the current sea area.

[0028] like Figure 1 As shown, the cavity 13 extends in a tubular shape and is laid in the sea area far from the shore, forming a flow cavity 1 inside. One end of the tubular cavity 13 is a medium inlet 11, extending along the axis O and connected to the sewage discharge pipe; the other end is a medium outlet 12, communicating with seawater. Drainage ports 2 are distributed on the cavity 13. During sewage discharge, sewage enters from the medium inlet 11 and exits from the medium outlet 12, traveling a relatively long distance in the flow cavity 1. As it flows through the flow cavity 1, the pressure difference created by the flow velocity draws external sewage into the flow cavity 1 through the drainage ports 2 to dilute the sewage to be discharged.

[0029] Existing marine discharge devices primarily increase the number and distribution of discharge outlets by adding branch pipes at the outlet. Essentially, this disperses the outflow over a certain area of ​​sea to prevent localized wastewater accumulation. When wastewater accumulates in a small space, it doesn't mix quickly with seawater. Therefore, at each branch outlet, the undiluted wastewater, maintaining its initial concentration, negatively impacts the marine ecosystem around the outlets. In contrast, the dilution discharge device of this invention is a solution that dilutes wastewater internally before discharging it. This prevents wastewater exceeding standard concentration requirements from flowing out of the medium outlet 12 into the open sea and affecting the marine ecosystem outside the medium outlet 12. In this dilution discharge device, provided the cavity 13 is long enough, wastewater is not discharged prematurely before dilution. Instead, the fluid dynamics during discharge draw external seawater into the flow cavity 1, allowing the seawater and wastewater to mix evenly within the flow cavity 1 before being discharged from the medium outlet 12. Therefore, even near the medium outlet 12, there is no problem of excessively high local concentrations of seawater.

[0030] Both the medium inlet 11 and the outlet 2 of this dilution and sewage discharge device preferably adopt duckbill valves to realize the dilution and sewage discharge device. Since the duckbill valve has the characteristic of opening without power while realizing unidirectional flow, it can be maintenance-free after being put into the sea, thus solving the problem of inconvenient maintenance after the dilution and sewage discharge device is submerged below the sea surface. Figure 2 This is a schematic diagram showing the specific installation of the inlet 2. To avoid the inlet 2 being unable to open due to the positive impact of the incoming flow, the inlet 2 should be deflected downstream of the radial direction R of its installation position. This ensures that the hydrodynamic pressure at the inlet 2 is reduced to allow seawater to be drawn in, and that the drawn-in seawater and the sewage flowing in the flow chamber 1 can be smoothly merged. The deflection angle α of the inlet 2 is preferably set to 30–60°. The inlet 2 is a duckbill valve, and its sealing port 21 is located inside the flow chamber 1, thus hindering the continuous flow of sewage in the flow chamber 1. Of course, appropriate hindrance is beneficial, as it can break the laminar flow state of the incoming flow, causing flow separation after the incoming flow encounters the inlet 2, thereby forming turbulence in the flow chamber 1 and accelerating the mixing of sewage and the drawn-in seawater. Based on this, the sealing port 21 is preferably parallel to the radial plane OR shown in the figure.

[0031] Figure 3This is a schematic diagram of the overall structure of the dilution and discharge device. To ensure the seawater entering the flow chamber 1 achieves the desired dilution, multiple or more rows of inlet ports 2 are arranged along the axis O on the cavity 13 of the flow chamber 1. Thus, as the wastewater enters from the medium inlet 11, passes through the flow chamber 1, and flows out from the medium outlet 12, seawater is sequentially drawn in through the multiple rows of inlet ports 2, completing the stepwise dilution process. Based on the same consideration, multiple inlet ports 2 can be arranged circumferentially on the cavity 13, with the multiple inlet ports 2 staggered from each other in the circumferential direction of the cavity 13 to avoid outflow from the same position along the axis O of the cavity 13. As a more preferred technical solution, such as... Figure 4 As shown, the inlet 2 is preferably spirally arranged on the cavity 13, so that the inlet 2 are evenly staggered and distributed on the cavity 13. Considering that the velocity of the sewage entering the flow cavity 1 gradually decreases due to the continuous addition of seawater and the presence of frictional resistance in the flow cavity 1, the ability to draw in seawater decreases. This problem can be balanced by gradually increasing the axial spacing of the inlet 2. When the inlet 2 is spirally arranged on the cavity 13, the pitch gradually increases along the axis O to the medium outlet 12, so that the spacing between the inlet 2 gradually increases along the axis O to the medium outlet 12, thus balancing the problem of insufficient power. As seawater is drawn in, the amount of liquid entering the flow cavity 1 increases. Optionally, the cavity 13 can be set to a shape with a variable diameter to match this problem. Based on this, a simplified design is to make the diameter of the cavity 13 increase linearly from the medium inlet 11 to the medium outlet 12, making the flow cavity 1 a slender variable cross-section cavity.

[0032] like Figure 5 As shown, in actual installation, the dilution and sewage discharge device is placed below the sea surface. It can be placed in a sea area at a certain height above the seabed by means of support or suspension. At this time, the cavity 13 is suspended on all four sides and directly contacts the seawater, requiring no special treatment. However, this is generally difficult to achieve, as it is impossible to reliably fix and control the dilution and sewage discharge device. Therefore, more often, the cavity 13 is directly placed on the seabed, as shown in Figure 5. The lower part of the cavity 13 is in contact with the seabed or foundation. In this case, care must be taken to ensure that the drainage port 2 avoids the seabed. Therefore, the drainage port 2 should only be distributed on the circumferential surface of the cavity 13 that is not in contact with the seabed. In actual construction, it is usually required that the drainage port 2 be distributed only on 1 / 2 to 2 / 3 of the circumferential surface of the cavity 13, and during installation, the part of the circumference without drainage port 2 should be used as the contact surface for installation on the seabed or foundation. As a preferred embodiment, setting the drainage port 2 in three groups around the circumference is one of the more suitable embodiments.

[0033] Existing decentralized discharge systems directly discharge wastewater into the sea from various branches, relying on the wastewater to gradually mix with seawater over a large area to reduce its impact on the surrounding ecosystem. Undoubtedly, when wastewater is first discharged from the branch outlets, it cannot immediately drop below the required concentration limits, thus its impact on the surrounding ecosystem remains significant, making it difficult to achieve completely harmless discharge. Compared to existing technologies, the dilution discharge device of this invention is essentially an internal dilution type discharge system. The dilution process occurs within the flow chamber 1, and after dilution, the concentration of substances in the liquid discharged from the medium outlet 12 is reduced to within permissible limits, therefore it will not affect the ecological environment of the surrounding sea area. On the other hand, existing decentralized discharge devices require multiple discharge outlets, which are generally set up on the seabed in a branched structure. In order to arrange the discharge device, the seabed at the location of the discharge device needs to be properly hardened with stones or the like. The branched structure makes it difficult to assemble in sections at sea and increases the amount of earthwork. The dilution discharge device of the present invention is a single cylindrical shape, preferably a straight cylindrical shape to reduce flow resistance. It does not require branch assembly. At the same time, since there is only one main pipe with a short laying distance, the amount of earthwork is less.

[0034] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A dilution and sewage discharge device, characterized in that, It has a flow chamber (1) for completing the dilution operation. The flow chamber (1) has a medium inlet (11) and a medium outlet (12) respectively on the cavity (13). The cavity (13) is also provided with a flow port (2) for introducing external fluid into the flow chamber (1). The flow port (2) opens unidirectionally towards the flow chamber (1). The medium inlet (11) and the drain port (2) are both duckbill valves that open unidirectionally into the flow chamber (1); the sealing port (21) of the drain port (2) is coplanar with the axis of the cavity, and the sealing port (21) is located inside the flow chamber (1).

2. The dilution and sewage discharge device as described in claim 1, characterized in that, The cavity (13) extends in a tubular shape, and a flow cavity (1) is formed inside the pipe; one end of the cavity (13) is connected to the medium inlet (11), which opens unidirectionally toward the flow cavity (1), and the other end is connected to the medium outlet (12); the drainage port (2) is distributed on the cavity (13).

3. The dilution and sewage discharge device as described in claim 1, characterized in that, The drain port (2) is inclined on the cavity (13) towards the medium outlet (12), and the inclination angle between the drain port (2) and the radial direction of the cavity (13) is 30 to 60°.

4. The dilution and sewage discharge device as described in claim 1, characterized in that, The diameter of the cavity (13) gradually increases from the medium inlet (11) to the medium outlet (12).

5. The dilution and sewage discharge device according to any one of claims 1-4, characterized in that, The drainage port (2) is provided in at least one row along the axis (O) on the cavity (13), and at least one is provided in the circumferential direction of the cavity (13).

6. The dilution and sewage discharge device as described in claim 5, characterized in that, The drainage ports (2) are staggered around the cavity (13).

7. The dilution and wastewater discharge device according to any one of claims 1-3, characterized in that, Multiple drainage ports (2) are distributed along a spiral line on the cavity (13).

8. The dilution and sewage discharge device as described in claim 7, characterized in that, The pitch of the helix gradually increases along the axis (O) to the medium outlet (12).

9. The dilution and sewage discharge device according to any one of claims 1-3, characterized in that, The drainage port (2) is distributed only on 1 / 2 to 2 / 3 of the circumferential surface of the cavity (13).

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