G-shaped divergent water distributor, annular water distribution device and sludge separation facility

Abstract

The utility model relates to a G type divergent type water distributor, annular water distribution device and sludge separation facility, the water distributor is provided with an upper bottom, a lower bottom, an inner side plate, an inner baffle plate and an outer baffle plate, the upper bottom and the lower bottom are both in a circular ring shape, the inner side plate, the inner baffle plate and the outer baffle plate are all in a cylindrical shape, and the upper bottom and the lower bottom are both in a circular ring shape. The top edge and the bottom edge of the inner side plate are connected with the inner circle of the upper bottom and the inner circle of the lower bottom respectively, the inner baffle plate is located between the inner side plate and the outer baffle plate, a gap is reserved between the inner baffle plate and the outer baffle plate, a gap is reserved between the top edge of the inner baffle plate and the upper bottom, the bottom edge of the inner baffle plate is connected with the outer circle of the lower bottom, and the top edge of the outer baffle plate is connected with the outer circle of the upper bottom. The annular water distribution device adopts the water distributor, and the sludge separation device adopts the annular water distribution device. The water distributor and the water distribution device disclosed by the utility model are uniform in water distribution, capable of preventing blockage, small in disturbance to a water body and capable of better meeting the water distribution requirement of a sludge sedimentation tank / sludge storage tank.

Description

Technical Field

[0001] The utility model relates to a G-type gradually expanding water distributor, an annular water distribution device and sludge separation facilities. Background Art

[0002] Existing sewage treatment stations usually use sedimentation tanks to separate the solid and liquid of sludge. The sludge with a high water content from the sewage treatment facility is directly sent to the bottom of the sedimentation tank through a pipe, and sedimentation and separation are carried out by weight. An overflow port is set at the top of the sedimentation tank, and a sludge discharge port and a sludge discharge device are set at the bottom. After sedimentation and separation, the supernatant flows back to the regulating tank at the front end of the equipment through the overflow port or enters the next treatment facility. The sludge with a reduced water content is sent out through the sludge discharge facility and enters the next drying treatment facility. The disadvantage of this method is that the water flow impact is relatively large, which greatly disturbs the water body of the sedimentation tank, affecting the sludge effect. The water outlet of the overflow port is turbid, the sludge discharge efficiency is reduced, and the specified flow rate of sludge discharge cannot be effectively completed. Therefore, in order to achieve the required sludge discharge requirements, manual supervision is required. After discharging a small amount of sludge, it stops for a period of time, and then starts to discharge a small amount of sludge again. The process is repeated many times, which not only wastes human resources but also reduces the processing capacity of the equipment.

[0003] On the other hand, the existing water distributor is mainly used for sewage. A number of through holes or a number of water outlets can be evenly distributed on the wall of the water distribution pipe to achieve uniform distribution of the water outlet. However, due to the small aperture of the water outlet, the overall flow area is small, and the water outlet speed is fast. If used in a sludge sedimentation tank, there will still be a certain degree of turbulence, which affects the sedimentation effect. At the same time, the water outlet is also easy to be blocked, affecting actual use. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the utility model provides a G-type gradually expanding water distributor, an annular water distribution device using such a water distributor, and a sludge separation facility using such an annular water distribution device, so as to adapt to the sludge sedimentation in sewage treatment plants and improve the sedimentation effect of stored mud (or sludge).

[0005] The technical solution of the present utility model is: a G-type gradually expanding water distributor suitable for improving the sedimentation effect of stored mud (or sludge) in sewage treatment plants, which is annular and has a G-shaped cross section. It is provided with an upper bottom, a lower bottom, an inner plate, an inner baffle and an outer baffle. The upper bottom and the lower bottom are both annular, and the inner plate, the inner baffle and the outer baffle are all cylindrical. The top and bottom edges of the inner plate are respectively connected (sealed, for example, welded, or integrally formed) to the inner circles (inner edges, or inner edges) of the upper bottom and the lower bottom. The inner baffle is located between the inner plate and the outer baffle, and a spacing (radial spacing) is left between the inner plate and the outer baffle. A gap is left between its top edge and the upper bottom, and its bottom edge is connected (sealed, for example, welded, or integrally formed) to the outer circle (outer edge, or outer edge) of the lower bottom. The top edge of the outer baffle is connected (sealed, for example, welded, or integrally formed) to the outer circle of the upper bottom.

[0006] Preferably, the height (vertical position) of the top edge of the inner baffle is higher than the height of the bottom edge of the outer baffle.

[0007] Preferably, the bottom edge height of the outer deflector is higher than the bottom height.

[0008] Furthermore, the inner plate is provided with an inlet (the inlet of the water distributor), and the annular gap between the bottom edge of the outer baffle and the inner baffle constitutes an outlet (the outlet of the water distributor).

[0009] The number of the inlets may be one or more, and a sealing plate (or baffle) is provided between the inner deflector plate and the inner side plate, and the sealing plate blocks the gap (medium flow channel) between the inner deflector plate and the inner side plate. The number of the sealing plates is the same as the number of inlets, corresponding to each inlet respectively, and located on one side of the inlet in the circumferential direction. When the number of inlets is multiple, each inlet is distributed at equal intervals (equal angular distances) in the circumferential direction, and each sealing plate is located on the same side of the corresponding inlet (the same side in the circumferential direction), so that the fluid entering the gap between the inner side plate and the inner deflector plate from the inlet can only flow in one direction in the circumferential direction, and cannot flow through the sealing plate in front (in front of the circumferential direction) (when there is only one sealing plate, it will be blocked by the sealing plate when flowing around. In this case, the baffle can be regarded as the front baffle of this circumferential flow).

[0010] A ring-shaped water distribution device adapted for improving the sludge storage and sedimentation effect in a sewage treatment plant is provided with a vertical central guide tube and an annular water distributor. The bottom end of the central guide tube is connected to the annular water distributor via a cross water guide trough (or cross water guide pipe). The annular water distributor is any one of the G-type gradually expanding water distribution troughs disclosed in the present utility model adapted for improving the sludge storage and sedimentation effect in a sewage treatment plant. Four inlets corresponding to the cross water guide trough are provided on the inner side plate of the annular water distributor. The four outlets of the cross water guide trough are respectively connected (connected, for example, continuously welded) to the four inlets on the annular water distributor. The top surface of the center (cross intersection) of the cross water guide trough is provided with an inlet connected to the bottom end (bottom end port, that is, outlet) of the central guide tube.

[0011] Preferably, a guide cone is provided in the cross water guide groove, and the guide cone is located directly below the bottom end (bottom end port) of the central guide tube, the top end (tip) of the guide cone is facing upward, and the axis of the guide cone coincides with the axis of the central guide tube (or, is located on the same straight line).

[0012] A sludge separation facility suitable for improving the sludge sedimentation effect in a sewage treatment plant comprises a sedimentation tank and a water distribution device for distributing water into the sedimentation tank. The water distribution device is any annular water distribution device suitable for improving the sludge sedimentation effect in a sewage treatment plant disclosed in the utility model.

[0013] Furthermore, the annular water distributor is horizontally arranged and located in the middle of the sedimentation tank (vertically in the middle, that is, vertically between the design water level / overflow weir and the mud collecting hopper), and the number is one or more. When the number of annular water distributors is multiple, the heights of the multiple annular water distributors are the same. The lower part of the sedimentation tank is a mud collecting hopper (or a mud collecting hopper structure is adopted). The number of the mud collecting hoppers (or mud collecting hopper structures) is the same as the number of annular water distributors. The mud collecting hoppers are located directly below their corresponding annular water distributors. An overflow trough (upper clear water overflow trough) is provided on the top of the sedimentation tank. The inner wall of the overflow trough is the overflow weir. The inner side of the overflow weir is the water holding space of the sedimentation tank, which can be regarded as the inner wall of the corresponding part (top) of the sedimentation tank.

[0014] As a preferred embodiment, a mixing tank and a flocculation tank may be provided on the water inlet side of the sedimentation tank, the effluent of the mixing tank is connected to the flocculation tank, and the effluent of the flocculation tank is connected to the water distribution device of the sedimentation tank (or the water inlet of the sedimentation tank). In this way, the pollutant removal rate can be increased, the sludge separation effect can be improved, and the purification degree of the effluent (of the sedimentation tank) can be improved through mixing and flocculation.

[0015] Preferably, the mixing tank, flocculation tank and sedimentation tank are separated by the same tank body (or, the mixing tank, flocculation tank and sedimentation tank are located in the same tank body), a first partition (for example, a partition wall or a partition board) is provided between the mixing tank and the flocculation tank, and a second partition (for example, a partition wall or a partition board) is provided between the flocculation tank and the sedimentation tank. A gap (distance) is left between the bottom edge of the first partition and the bottom of the tank, and the gap constitutes a medium channel from the mixing tank to the flocculation tank. The water inlet (the water inlet of the sludge separation facility) is provided in the mixing tank, and the water inlet pipe can be connected to the mixing tank to introduce the incoming water into the mixing tank. The bottom edge of the second partition is connected to the bottom of the tank as a whole, and the top edge of the second partition is provided with an overflow port connected to the water distribution tank of the sedimentation tank. The water distribution tank of the sedimentation tank is located above the sedimentation tank, and the top end (top port) of the central guide tube of the annular water distributor is connected to (connected with) the water distribution tank, and the incoming water is introduced from the water distribution tank.

[0016] The beneficial effects of the present invention are as follows: the water distributor changes the sludge flow direction and buffers the impact force and disturbance brought by the water flow through the annular structure and the trough type, adopts internal deflection to reduce the kinetic energy of the water outlet, and adopts the annular gap as the outlet to increase the flow area, thereby achieving a soft landing of the water outlet, greatly reducing the impact force, thereby significantly reducing the disturbance of the water flow in the sedimentation tank, and facilitating the weight sedimentation of the sludge; the clear liquid can be discharged from the upper edge of the tank body to carry out the sludge sedimentation and storage cycle process, and the sludge discharge and storage process can be completed as much as possible, reducing the impact of the single sludge discharge disturbance impact, accelerating the sedimentation effect, and the discharged sludge has a low moisture content, which is beneficial to the subsequent sludge solidification and drying.

[0017] The water distributor and water distribution device of the utility model distribute water evenly, can prevent blockage, and have little disturbance to the water body, and can better adapt to the water distribution needs of the sludge sedimentation tank / sludge storage tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the cross-sectional structure of the G-type gradually expanding water distributor of the present utility model;

[0019] Figure 2 This is a partial structural diagram of the connection between the G-type gradually expanding water distributor and the cross water guide trough of the utility model;

[0020] Figure 3 is with Figure 2 The corresponding horizontal cross-section structure diagram at a certain height;

[0021] Figure 4 This is a schematic diagram of the elevation (longitudinal section) structure of the annular water distribution device of the present invention;

[0022] Figure 5 This is a schematic top view of the annular water distribution device of the present invention;

[0023] Figure 6 This is a schematic top view of an embodiment of the sludge separation facility of the present invention;

[0024] Figure 7 is with Figure 6 Schematic diagram of the vertical (longitudinal) structure of the corresponding sludge separation device;

[0025] Figure 8 This is a schematic top view of another embodiment of the sludge separation facility of the present invention;

[0026] Figure 9 is with Figure 8 Schematic diagram of the corresponding elevation (longitudinal section) structure of the sludge separation setup. DETAILED DESCRIPTION

[0027] See also Figure 1-Figure 5 The water distribution device 100 of the annular water distribution device of the present invention adopts a G-type gradually expanding trough water distributor 20 for water distribution, which can be mainly used for rapid sedimentation and water distribution of sludge in a sludge storage tank (sludge sedimentation tank) 210. The bottom of the water distribution device is a cross-dispersed annular structure. The water outlet of the lower end of the central guide tube 30 is connected to the four inlets of the G-type gradually expanding trough water distributor through the cross water guide trough 10. One side of the annular channel in the inlet is sealed with a vertical baffle 28, and the other side is open to realize the annular guidance of the incoming water. At the same time, a gap is left between the upper end of the inner baffle 24 and the upper bottom 23, so that the incoming water is diverted through the gap. Then it is blocked by the outer deflector 25 and deflected downward again, flowing out from the annular gap. The annular structure formed by the upper bottom 23, the lower bottom 22, the inner plate 21, the inner deflector 24 and the outer deflector 25 has a horizontal G-shape in cross section. The annular structure can be regarded as an annular upper trough body (the notch facing downward) and an annular lower trough body (the notch facing upward). The width of the upper trough body is greater than that of the lower trough body, and the inner diameters are the same. The inner trough walls are connected as a whole, and the outer trough walls are staggered to form gaps to achieve distributed water distribution (mud discharge). The specific dimensions of each part can be set according to actual needs. A guide cone 38 is set at the central intersection of the cross water guide groove to facilitate the dispersion of the incoming water to the surroundings. An inlet connected to the water guide channel 16 in the cross water guide groove is opened on the inner wall. The water flowing in from the inlet first enters the space (annular space) 26 between the inner plate and the inner guide plate, and can flow unidirectionally circumferentially in this space. With this circumferential flow, water continuously crosses the inner baffle and enters the annular space 27 between the inner baffle and the outer baffle, and then enters the sedimentation tank from the outlet of the space.

[0028] The outlet flow rate of this water distributor has certain circumferential components, vertical components and radial components. While avoiding hindering the overall sludge sedimentation effect of the sedimentation tank at a low flow rate, a weaker spiral laminar flow is formed in the water distributor and in the area near the outlet. This is not only conducive to avoiding sludge deposition in the water distributor or at the outlet to cause blockage, but also conducive to the relatively uniform distribution of sludge in all directions / parts in the sedimentation tank, thereby improving the sedimentation effect and improving the effluent quality (purification level).

[0029] The water flow direction of the water distribution device: Water enters the top of the vertical pipe (center guide tube), flows into the cross water guide groove from the bottom, hits the guide cone, and is dispersed in all directions under the guidance of the guide cone. It is then divided along the four directions of the cross water guide groove and flows horizontally (radially) into the G-shaped water distributor. After entering the water distributor, it is blocked by the internal baffle, and the water slowly pours out to reduce the head potential energy. On the one hand, it flows circumferentially in the one-way annular channel between the inner wall plate and the inner baffle, and on the other hand, water continuously flows over the inner baffle, further buffering the flow velocity potential energy through the up and down baffles. After multiple changes in direction and speed reduction, most of the water flow impact is reduced, allowing the sludge to slowly flow to the bottom, improving the sedimentation effect.

[0030] The G-type progressively expanding water distributor and annular water distribution device of this utility model can be used for water distribution in various sewage treatment facilities and sludge treatment facilities, especially in the sludge storage tanks and sedimentation tanks of sewage treatment plants. They can significantly improve the sedimentation efficiency of stored sludge, avoid or reduce blockage of water distribution pipelines, and thus provide corresponding conditions for maintaining stable operation and reducing maintenance costs. The specific form of these facilities can be flexibly set according to actual needs.

[0031] For example, Figure 6-Figure 7 The diagram shows a square sedimentation tank with a circular water distribution device installed in the tank 210. A ring of overflow troughs 220 is installed on the top and outside of the tank body. The top of the tank body 200 (the top of the tank wall) serves as the inner trough wall of the overflow trough, forming an overflow weir 221. An outlet pipe 202 is connected to the overflow trough to divert water from the overflow trough. The water distributor is located at an appropriate height within the tank. The water inlet pipe 201 is connected to the top of the vertical central guide tube 30. Incoming water flows into the tank through the central guide tube 30, the cross guide trough 10, and the G-shaped water distributor 20. Sludge entering the tank settles downward and is deposited in the sludge hopper 230. When sludge needs to be discharged, the sludge pump / drain device 235 at the bottom of the hopper and the sludge discharge valve 236 on the sludge discharge pipe 203 are opened to discharge the sludge in the hopper.

[0032] Figure 8-Figure 9The separation facility shown adds a mixing tank 250 and a flocculation tank 260 to the water inlet side of the sedimentation tank 210. The first partition 252 and the second partition 262 can be used to separate the space in the tank body 200 into a mixing tank, a flocculation tank and a sedimentation tank in sequence to achieve a compact overall structure. The water inlet pipe 201 is connected to the mixing tank, and is stirred and mixed by the agitator 254 in the mixing tank. The water in the mixing tank flows into the flocculation tank through the gap below the first partition. Flocculant can be added as needed and stirred and mixed by the agitator 264 in the flocculation tank. An overflow port is set at the top of the second partition, which is connected to the water distribution tank (the water distribution tank of the sedimentation tank) 240 located above the sedimentation tank. The water in the flocculation tank flows into the water distribution tank through the overflow port. The water distribution device 100 is arranged in two rows, located on the left and right sides of the water distribution tank respectively. The top of the central guide tube 30 of the water distribution device is connected to the water distribution tank, and the water is introduced into the water distribution tank. The water in the sedimentation tank is collected by two rows of mud collecting buckets 230, which correspond to the water distribution devices in the two rows of water distribution devices respectively. The sludge entering the tank through each water distributor settles downward and is deposited in the mud collecting bucket. When mud discharge is required, the sludge pump / mud discharge device 235 at the bottom of the mud collecting bucket and the mud discharge valve 236 on the mud discharge pipe 203 are opened to discharge the sludge in the mud collecting bucket. Overflow troughs 220 are set on both sides of the sedimentation tank (outside of the two rows of water distribution devices), and the walls of the sedimentation tanks on the corresponding sides constitute the overflow weirs 221 of the corresponding overflow troughs. The clear water overflows into the overflow trough and is connected to the outlet pipe 202 through the pipeline.

[0033] Unless otherwise specified or when one preferred or optional technical means is a further limitation of another technical means, the preferred and optional technical means disclosed in the present utility model can be arbitrarily combined to form several different specific implementation methods.

Claims

1. A G-type gradually expanding water distributor suitable for improving the sedimentation effect of sludge storage in sewage treatment plants, which is annular and characterized by It is provided with an upper bottom, a lower bottom, an inner plate, an inner baffle and an outer baffle, the upper bottom and the lower bottom are both annular, the inner plate, the inner baffle and the outer baffle are all cylindrical, the top edge and the bottom edge of the inner plate are respectively connected to the inner circle of the upper bottom and the lower bottom, the inner baffle is located between the inner plate and the outer baffle, and there is a distance between the inner plate and the outer baffle, there is a gap between its top edge and the upper bottom, its bottom edge is connected to the outer circle of the lower bottom, and the top edge of the outer baffle is connected to the outer circle of the upper bottom.

2. The G-type gradually expanding water distributor according to claim 1, characterized in that The top edge height of the inner baffle is higher than the bottom edge height of the outer baffle.

3. The G-type gradually expanding water distributor according to claim 2, characterized in that The bottom edge height of the outer baffle is higher than the bottom height.

4. The G-type gradually expanding water distributor according to any one of claims 1 to 3, characterized in that An inlet is provided on the inner side plate, and an outlet is formed by the annular gap between the bottom edge of the outer baffle and the inner baffle.

5. The G-type gradually expanding water distributor according to claim 4, characterized in that The number of the inlets is one or more, and a sealing plate is provided between the inner deflector and the inner side plate, and the sealing plate blocks the gap between the inner deflector and the inner side plate. The number of the sealing plates is the same as the number of inlets, and corresponds to each inlet respectively, and is located on one side of the inlet in the circumferential direction. When the number of inlets is multiple, each inlet is distributed at equal intervals in the circumferential direction, and each sealing plate is located on the same side of the corresponding inlet.

6. A ring-shaped water distribution device suitable for improving the sedimentation effect of sludge storage in sewage treatment plants, comprising a vertical central guide tube and a ring-shaped water distributor, wherein the bottom end of the central guide tube is connected to the ring-shaped water distributor via a cross water guide groove, characterized in that The annular water distributor is a G-type gradually expanding water distribution trough suitable for improving the sludge storage and sedimentation effect of sewage treatment plants as described in any one of claims 1-5. Four inlets corresponding to the cross water guide trough are provided on the inner side plate of the annular water distributor. The four outlets of the cross water guide trough are respectively connected to the four inlets on the annular water distributor. An inlet connected to the bottom end of the central guide tube is provided on the central top surface of the cross water guide trough.

7. The annular water distribution device according to claim 6, characterized in that A guide cone is provided in the cross water guide groove. The guide cone is located directly below the bottom end of the central guide tube. The top end of the guide cone faces upward, and the axis of the guide cone coincides with the axis of the central guide tube.

8. A sludge separation facility adapted for use in sewage treatment plants to improve sludge sedimentation efficiency, comprising a sedimentation tank and a water distribution device for distributing water into the sedimentation tank, characterized in that The water distribution device is the annular water distribution device as described in claim 6 or 7, which is suitable for improving the sludge sedimentation effect in sewage treatment plants.

9. The sludge separation facility according to claim 8, characterized in that The annular water distributor is horizontally arranged and located in the middle of the sedimentation tank. There are one or more annular water distributors, and the heights of the multiple annular water distributors in the sedimentation tank are consistent. The lower part of the sedimentation tank is a mud collecting hopper. The number of the mud collecting hoppers is the same as the number of annular water distributors. The mud collecting hoppers are located directly below their corresponding annular water distributors. An overflow trough is provided on the top of the sedimentation tank.

10. The sludge separation facility according to claim 9, characterized in that The so-called sedimentation tank is provided with a mixing tank and a flocculation tank on the water inlet side, the effluent of the mixing tank is connected to the flocculation tank, and the effluent of the flocculation tank is connected to the water distribution device of the sedimentation tank. The mixing tank, flocculation tank and sedimentation tank are separated in sequence by the same tank body, and a first partition is provided between the mixing tank and the flocculation tank, and a second partition is provided between the flocculation tank and the sedimentation tank. A gap is left between the bottom edge of the first partition and the bottom of the tank, and the gap constitutes a medium channel from the mixing tank to the flocculation tank. The water inlet is provided in the mixing tank, and the bottom edge of the second partition is connected to the bottom of the tank. The top edge of the second partition is provided with an overflow port connected to the water distribution trough of the sedimentation tank. The water distribution trough of the sedimentation tank is located above the sedimentation tank, and the top end of the central guide tube of the annular water distributor is connected to the water distribution trough.

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