CN215781734U - Radial flow sedimentation tank - Google Patents

Abstract

The utility model belongs to the technical field of water treatment, solves the technical problems of low sedimentation efficiency, low effluent quality, time and labor waste of the existing radial sedimentation tank, provides a radial sedimentation tank, which comprises a pool bottom wall, a pool peripheral wall, a settlement plate, a mud scraping device, a water collecting tank, a plurality of water inlet assemblies, a first mud discharging assembly and a second mud discharging assembly, wherein the pool bottom wall and the pool peripheral wall extend along the vertical direction and jointly limit a flowing space of water flow, the settlement plates which are sequentially stacked at intervals are arranged in the flowing space, the bottom wall of the pool and the adjacent sedimentation plates and the two adjacent sedimentation plates are layered into a sedimentation layer, the outer periphery of each settling plate is provided with a frame extending perpendicular to the bottom wall of the tank, a water passing gap is formed between the frame and the peripheral wall of the tank, a rotating shaft of the mud scraping device drives each mud scraping mechanism to scrape mud under the driving of a driving mechanism, and a water collecting tank is arranged at the top of the peripheral wall of the tank; the radial flow sedimentation tank has the advantages of high sedimentation efficiency, high effluent quality, time saving and labor saving.

Description

Radial flow sedimentation tank

Technical Field

The utility model relates to the technical field of water treatment, in particular to a radial flow type sedimentation tank.

Background

Sedimentation is the process of separating suspended particles from water by gravity. The precipitation process is an important link of the conventional water treatment process, is indispensable in municipal water supply and sewage treatment, and is also a process which occupies a large proportion of land and investment in water plant engineering.

At present, radial flow sedimentation tanks adopted in water treatment industries such as tap water production, sewage treatment and the like have low sedimentation efficiency, in order to improve the sedimentation efficiency of the existing radial flow sedimentation tank, inclined pipes and inclined plates are generally added in the existing radial flow sedimentation tank, water flows from bottom to top, settled sludge slides downwards along the inclined pipes and the inclined plates, the impact load resistance of the inclined pipes and the inclined plates is poor due to the high water flow speed of the downward impact of the settled sludge, in addition, when the ambient temperature rises, algae are easy to grow on the upper parts of the inclined pipes and the inclined plates, the water quality of outlet water is reduced, and the removal of the algae wastes water, time and labor.

Therefore, it is urgently needed to provide a radial flow sedimentation tank which can improve sedimentation efficiency, has high effluent quality and saves time and labor.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides a radial flow sedimentation tank, which comprises: a tank bottom wall and a tank peripheral wall extending in a vertical direction which together define a flow space for the water flow; the sedimentation plates are arranged in the flow space and are sequentially stacked at intervals, the bottom wall of the pool and the adjacent sedimentation plates as well as the two adjacent sedimentation plates are layered into a sedimentation layer, the outer periphery of each sedimentation plate is provided with a frame extending perpendicular to the bottom wall of the pool, and a water passing gap is arranged between the frame and the peripheral wall of the pool; the sludge scraping device comprises a driving mechanism and a rotating shaft which are in driving connection and a plurality of sludge scraping mechanisms which are fixedly connected with the rotating shaft, the bottom wall of the tank and each settling plate are respectively provided with a sludge scraping mechanism, and the driving mechanism drives the rotating shaft to rotate so as to drive each sludge scraping mechanism to periodically and synchronously rotate on the upper surface of the corresponding bottom wall of the tank or the upper surface of the corresponding settling plate to scrape sludge; the water collecting tank is arranged at the top of the peripheral wall of the pool and communicated with the top of the flowing space; a plurality of water inlet assemblies, each of which is provided corresponding to each of the sedimentation layers to guide the raw water into the flow space; the first sludge discharge assembly is arranged on the lower surface of each settling plate to receive corresponding settled sludge and discharge the settled sludge out of the flowing space; and the second sludge discharge assembly is arranged below the bottom wall of the pool to receive corresponding settled sludge and discharge the settled sludge to the outside of the flowing space.

The peripheral wall of the further tank and the plurality of sedimentation plates are provided with the same central axis, and the rotating central line of the rotating shaft is superposed with the central axis; the first sludge discharge assembly comprises a plurality of sludge collecting hoppers, and the sludge collecting hoppers are fixed on the lower surfaces of the settling plates relative to the water outlet direction and comprise hollow right-angle triangular cavities, each right-angle triangular cavity comprises a long right-angle surface where a pair of long right-angle sides are located, an oblique-angle surface where a pair of oblique sides are located, a short right-angle surface where a pair of short right-angle sides are located, and a triangular surface where the pair of long right-angle sides, the short right-angle sides and the oblique sides are located together, and each long right-angle surface is provided with a hollow part for receiving settled sludge; the settling plate is provided with a central hole and an opening extending from the central hole along the radial direction, and the opening is butted with the hollow part; and a sludge discharge pipe is arranged at the acute vertex angle of the right-angle triangular cavity, each sludge discharge pipe penetrates through the peripheral wall of the tank and is communicated with an external sludge collection tank, or each sludge discharge pipe for discharging sludge of the settling plates above the lowest layer passes through the water passing gap corresponding to the settling layer and is connected with a large-caliber main pipe together with the pipe orifice of the sludge discharge pipe for discharging sludge of the settling plates above the lowest layer, and the main pipe penetrates through the peripheral wall of the tank and is communicated with the external sludge collection tank.

Further, the settling zone is including being located the lower settling zone between pond diapire and the adjacent settling plate, be located two liang of adjacent settling plates between the well settling zone and be located the last settling zone on the settling plate of nearest pond perisporium top, in last settling zone, the reposition of redundant personnel jar is located rather than the top of adjacent settling plate and is less than the notch of water catch bowl, in well settling zone and the lower settling zone, the lower surface of the adjacent settling plate of top butt of each reposition of redundant personnel jar and the centre bore of settling plate are located the top surface periphery wall of reposition of redundant personnel jar, each inlet tube that corresponds to each reposition of redundant personnel jar uses the central axis to set up as the center along radial evenly interval, the below of each settling plate is supported by the top surface of each inlet tube and reposition of redundant personnel jar.

Furthermore, a lower bearing or a rotating shaft is arranged in a through hole in the bottom surface of the shunt tank and is set as a thin-upper and thick-lower stepped shaft, the number of stepped surfaces is equal to that of the shunt tank, and the stepped surfaces movably support the bottom surface of the adjacent shunt tank and are provided with wear pads.

Furthermore, actuating mechanism includes bridge type drive arrangement, half-bridge type drive arrangement, has the combination drive arrangement of motor and reduction gear, and actuating mechanism is connected to the last free end of pivot, lower free end rotationally locates in the central trompil of pond diapire, and upper and lower both free ends all install the bearing, and the top surface and the bottom surface of reposition of redundant personnel jar all open the through-hole that supplies the pivot to pass.

Furthermore, the bottom wall of the pool is planar, the bottom wall of the pool is provided with a mud collecting ditch along the radial direction, the second mud discharging assembly comprises a perforated mud discharging pipe arranged in the mud collecting ditch, or the bottom wall of the pool is conical, the bottom of the bottom wall of the pool is provided with a mud discharging port communicated with the conical bottom, and the second mud discharging assembly comprises a mud discharging pipe communicated with the mud discharging port.

Further, scrape mud mechanism including the suit be fixed in the sleeve of pivot periphery and respectively with sleeve fixed connection and for a pair of mud scraping frame and the mud scraper of pivot symmetry setting, to every to mud scraping frame and mud scraper, mud scraping frame includes a down tube, the one end and the sleeve fixed connection and the other end of down tube are fixed with mud scraper, the one end and the sleeve fixed connection and the other end of mud scraper are close to the frame.

Further, the settlement plate is the plate-like, and the mud scraping plate that each settlement plate corresponds is for the straight line form and will sink during mud scrapes into first mud discharging component, and when being the plane shape to the pond diapire, thereby a pair of mud scraping plate that corresponds arranges for the straight line form and press close to or contact with the pond diapire and will sink mud and scrape into the perforation mud discharging pipe in the mud collecting ditch, when the pond diapire is conical, a pair of mud scraping plate that corresponds arranges for two straight line clip angular shapes and press close to or contact with the conical surface respectively and will sink mud and scrape into in the mud discharging pipe of conical bottom department.

Furthermore, two free ends of a mud scraper configured on each settling plate are provided with arc baffles which are abutted against the inner surface of the frame and are concentric with the inner surface of the frame.

The utility model has the beneficial effects that: the radial flow type sedimentation tank adopts a plurality of sedimentation plates to separate and layer a plurality of sedimentation areas, the corresponding layer of each sedimentation plate is that water enters from the center and water exits from the periphery, the sedimentation plates and the sludge on the bottom wall of the tank are all removed by the sludge scraping device, and the sludge on each sedimentation plate is scraped into the sludge collecting hopper and is further discharged, therefore, the radial flow type sedimentation tank has a plurality of layers, thereby fully utilizing the theory of a shallow tank, improving the sedimentation efficiency of the sedimentation tank, leading the sludge scraping device to ensure that the sludge discharge is full and efficient, improving the water quality of the discharged water, avoiding the disadvantages caused by the easy growth of algae by adopting an inclined pipe and an inclined plate in the prior art, and achieving the effects of time saving and labor saving.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below, and for those skilled in the art, without any creative effort, other drawings may be obtained according to the drawings, and these drawings are all within the protection scope of the present invention.

FIG. 1 is a schematic overall view of an embodiment of a radial sedimentation tank of the present invention;

FIG. 2 is a schematic cross-sectional view of an embodiment of the radial sedimentation tank of the present invention (the tank bottom wall is planar and the sludge discharge pipe is omitted);

FIG. 3 is a schematic cross-sectional view of another embodiment of a radial flow sedimentation tank of the present invention; (the tank bottom wall is conical and a sludge discharge pipe is omitted);

FIG. 4 is a schematic view of a partial structure of a radial sedimentation tank of the present invention showing two sedimentation zones;

FIG. 5 is a schematic view of a partial structure of a radial sedimentation tank of the present invention showing a layer of sedimentation zone;

FIG. 6 is a partial schematic view of a radial flow sedimentation tank of the present invention showing a rotating shaft, water inlet assembly and concentric annular cross-arms;

FIG. 7 is a schematic view of a settling plate of a radial flow settling tank of the present invention;

FIG. 8 is a schematic view of a mud bucket of the radial sedimentation tank of the present invention;

description of reference numerals:

1. a tank bottom wall; 1.1, a mud collection ditch; 1.2, a sludge discharge port; 2. a tank peripheral wall; 3. a settlement plate; 3.1, a frame; 3.2, a central hole; 3.3, opening; 4. a drive mechanism; 5. a rotating shaft; 6. a mud scraping mechanism; 6.1, a mud scraping frame; 6.11, a diagonal rod; 6.12, reinforcing rods; 6.2, a mud scraper; 6.21, arc baffle; 6.3, a sleeve; 7. a water collection tank; 8. a mud collection hopper; 8.1, a right-angled triangular cavity; 8.11, long right-angle surface; 8.12, a hollow part; 8.13, oblique angle surface; 8.14, short right-angle surface; 8.15, triangular surface; 9. perforating a sludge discharge pipe; 10. a mud discharge pipe; 11. a water inlet pipe; 12. a shunt tank; 13. a water inlet main pipe; 14. a branch pipe; 15. buttress; 16. concentric circular cross arms.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element, and the plurality refers to two or more. In case of conflict, the embodiments of the present invention and the various features of the embodiments may be combined with each other within the scope of the present invention.

Referring to fig. 1 to 8, as an object of the present invention, there is provided a radial sedimentation tank including a tank bottom wall 1 and a tank peripheral wall 2 extending in a vertical direction which together define a flow space of a water flow, the tank bottom wall 1 of the radial sedimentation tank of the present invention being set as a circumferential surface or a conical surface, and the tank peripheral wall 2 being set as an inner peripheral cylindrical surface. The radial flow sedimentation tank also comprises a sedimentation plate 3, a mud scraping device, a water collecting tank 7, a plurality of water inlet assemblies, a first mud discharging assembly and a second mud discharging assembly, wherein the sedimentation plate 3 is a plurality of sedimentation plates 3 which are sequentially arranged in a flow space in an interval layer overlapping mode, a sedimentation layer is formed between the tank bottom wall 1 and the adjacent sedimentation plate 3 and between every two adjacent sedimentation plates 3, a frame 3.1 which extends perpendicular to the tank bottom wall 1 is arranged on the outer periphery of each sedimentation plate 3, the frame 3.1 can prevent mud from overflowing and improve the strength of the sedimentation plate 3, a water passing gap is arranged between the frame 3.1 and the tank peripheral wall 2, namely the diameter of the outer periphery of the sedimentation plate 3 is smaller than that of the tank peripheral wall 2 and that of the tank bottom wall 1, the water passing gap serves as a water outlet area to realize circumferential water outlet, the mud scraping device comprises a driving mechanism 4, a rotating shaft 5 and a plurality of mud scraping mechanisms 6 which are fixedly connected with the rotating shaft 5, the bottom wall 1 of the tank and each settling plate 3 are provided with a mud scraping mechanism 6, the driving mechanism 4 drives the rotating shaft 5 to rotate so as to drive each mud scraping mechanism 6 to periodically and synchronously rotate on the upper surface of the corresponding bottom wall 1 or settling plate 3 of the tank to scrape mud, preferably, in the rotating direction of the mud scraping mechanism 6, the sludge in front of the tank cannot leak to the rear, the water collecting tank 7 is arranged at the top of the peripheral wall 2 of the tank and is communicated with the top of the flowing space, namely an upper settling area (further explained below), in particular, the water collecting tank 7 is arranged around the top of the peripheral wall 2 of the tank and is connected with a water outlet pipe (not shown), a water inlet assembly is arranged corresponding to each settling layer so as to guide raw water into the flowing space, and a first sludge discharge assembly is arranged on the lower surface of each settling plate 3 so as to receive the sludge scraped by the sludge scraping operation of the corresponding sludge scraping mechanism 6 and discharge the sludge out of the flowing space, namely the peripheral wall 2 of the tank; the second sludge discharge assembly is disposed below the tank bottom wall 1 to receive the sludge scraped by the sludge scraping operation of the corresponding sludge scraping mechanism 6 and discharge the sludge out of the flow space, i.e., the tank bottom wall 1. According to the above description, the radial flow sedimentation tank of the utility model has the plurality of sedimentation plates 3 to divide the flow space into the plurality of sedimentation areas, the shallow tank theory is fully utilized, the sedimentation efficiency is improved, raw water is deposited on each sedimentation plate 3 and the bottom wall 1 of the tank through sludge obtained by sedimentation from top to bottom, the effluent is discharged through the water collecting tank 7 at the top of the peripheral wall 2 of the tank, and the sludge in each sedimentation area is scraped by the sludge scraping mechanism 6, so that the sludge discharge is full and efficient, the effluent quality is improved, and a plurality of disadvantages caused by the adoption of inclined pipes and inclined plates in the prior art for removing algae are avoided, thereby saving water, time and labor.

With further reference to fig. 1 to 5 and 8, in one embodiment, the peripheral wall 2 of the basin and the plurality of settling plates 3 all have the same central axis, the rotation center line of the rotating shaft 5 coincides with the central axis, so that water can be discharged circumferentially uniformly through the water gap, the first sludge discharge assembly comprises a plurality of sludge collecting hoppers 8, a sludge collecting hopper 8 is fixed to the lower surface of each settling plate 3, for example by welding, the sludge collecting hopper 8 is made of stainless steel and comprises a hollow right-angled triangular cavity 8.1, the right-angled triangular cavity 8.1 comprises a long rectangular surface 8.11 on which a pair of long rectangular sides are located, an oblique rectangular surface 8.13 on which a pair of oblique sides are located, a short rectangular surface 8.14 on which a pair of short rectangular sides are located, and a triangular surface 8.15 on which a pair of long rectangular sides, a short rectangular side and an oblique side are located together, the long rectangular surface 8.11 has a hollowed-out portion 8.12 for receiving sludge and can also be understood as an open portion, the settling plate 3 is provided with a central hole 3.2 and an opening 3.3 extending from the central hole 3.2 along the radial direction, the opening 3.3 is butted with the hollow part 8.12, namely the edges of the opening 3.3 and the hollow part 8.12 are fixed in a mutual superposition way, the leakage of settled mud falling into the mud collecting hopper 8 is avoided, for the volume of the mud collecting hopper 8, the settled mud amount can be calculated according to the turbidity of raw water, the raw water treatment amount and the interval time of two mud scraping operations, and then the volume of the mud is calculated according to the solid content of the settled mud, so that the volume of the mud collecting hopper 8 is slightly larger than the volume of the settled mud. A sludge discharge pipe (not shown) is arranged at the acute vertex angle of the right-angled triangular cavity 8.1, when the sludge deposition amount of each settling layer is large and the pipe diameter of the sludge discharge pipe is large, each sludge discharge pipe passes through the peripheral wall 2 of the tank and is communicated with an external sludge collection tank (not shown), or when the sludge deposition amount of each settling layer is small and only the pipe diameter of the sludge discharge pipe is small, each sludge discharge pipe for discharging sludge of the settling plates 3 above the lowest layer passes through the water gap corresponding to the settling layer and is connected with the pipe orifice of the sludge discharge pipe for discharging sludge of the settling plates 3 above the lowest layer together to form a large-caliber main pipe, the diameter of the interface of the main pipe can meet the requirement of sealing connection with the pipe orifice of each sludge discharge pipe, the main pipe passes through the peripheral wall 2 of the tank and is communicated with the external sludge collection tank, and the pipe diameters of each sludge discharge pipe and main pipe can generate sludge deposition volume according to the interval time of two sludge scraping operations, And calculating the required pipe diameter by using factors such as sludge discharge time and the like. In addition, a sludge discharge valve can be arranged at the position where the peripheral wall 2 of the tank is communicated with the sludge collecting tank, the outlet of the main pipe or the outlet of the sludge collecting tank to control sludge discharge, so that sludge in each settling zone can be reliably and timely discharged by arranging the cooperation of each sludge collecting hopper 8 and a sludge discharge pipe, and the settling efficiency and the settling quality of the radial flow settling tank are ensured.

Referring further to fig. 1 and 2, in an embodiment, the water inlet assembly includes a plurality of water inlet pipes 11 and a plurality of distribution tanks 12, the distribution tanks 12 may be hollow cylindrical, holes or slits are formed on the pipe walls of the distribution tanks 12, so that raw water enters the distribution tanks 12 through the water inlet pipes 11 and then is distributed to the sedimentation zones through the holes or slits, each water inlet pipe 11 is communicated with a water inlet main pipe 13 or a branch pipe 14 communicated with the water inlet main pipe 13, each distribution tank 12 is disposed on the rotating shaft 5, specifically, a through hole is formed at the center of the upper and lower bottom surfaces of the distribution tank 12 for the rotating shaft 5 to pass through, a distribution tank 12 is disposed in each sedimentation zone, and more specifically, three or more water inlet pipes 11 are used for the water inlet and flow direction of each sedimentation zone, the distribution tanks 12 are connected in the radial direction, the number of the water inlet pipes 11 is divided equally, the raw water is discharged by utilizing the holes or the slits on the pipe wall of the shunt tank 12, and the specific flow direction of the raw water obtained sediment is as follows: raw water → each inlet tube 11 → shunt tank 12 → hole or seam of shunt tank 12 → this layer of settling zone → water outlet zone, from above, through adopting suitable shunt tank 12, not only can guarantee that raw water circumference evenly gets into each settling zone, and can determine that the suitable amount of heavy mud deposits to subside on board 3 or the pond diapire 1, thereby the heavy mud that deposits in the interval time of each periodic rotation of each mud scraping mechanism 6 all can not be higher than frame 3.1, avoids the influence of the unnecessary heavy mud that the heavy mud was not in time scraped off to play water quality.

With further reference to fig. 1 to 3, in one embodiment the settling zone comprises a lower settling zone between the bottom wall 1 of the basin and the adjacent settling plates 3, a middle settling zone between two adjacent settling plates 3 and an upper settling zone above the settling plate 3 closest to the top of the basin's perimeter wall 2, in which upper settling zone the distribution tanks 12 are located above the settling plate 3 adjacent to it and below the mouth of the water collection sump 7, in which middle settling zone and lower settling zone the top surface of each distribution tank 12 abuts the lower surface of the adjacent settling plate 3 and the central hole 3.2 of the settling plate 3 is located within the perimeter wall of the top surface of the distribution tank 12, the respective inlet pipes 11 corresponding to each distribution tank 12 are evenly spaced radially centered on the central axis, the lower side of each settling plate 3 is supported by the respective inlet pipe 11 and the top surface of the distribution tank 12, so that each settling plate 3 is able to obtain a strong radial and axial support of each inlet pipe 11 and distribution tank 12, the intensity of accepting the mud that has improved each settlement plate 3, and then make each settlement plate 3 keep horizontal being arranged in the space that flows, guarantee that each mud scraping mechanism 6 all scrapes mud and the mud dynamics of scraping is unanimous to each position of each settlement plate 3.

In one embodiment, an underwater bearing (not shown) is installed in a through hole of the bottom surface of the distribution tank 12 or the rotating shaft 5 is set as a thick stepped shaft with a thin upper part and a thick lower part and the number of stepped surfaces is equal to the number of the distribution tanks 12, and the stepped surfaces movably support the bottom surface of the adjacent distribution tank 12 and are provided with wear pads, so that the settlement plate 3 can be supported by the respective water inlet pipes 11 and the distribution tanks 12 to prevent the settlement plate 3 from collapsing in the middle. In addition, the underwater bearings can be assembled in the through holes on the top surface of the diversion tank 12 and connected to the rotating shaft 5, generally speaking, if the strength of the rotating shaft 5 is sufficient, the rotating shaft 5 will not swing when driving the mud scraping mechanism 6 to rotate and scrape mud, only the through holes are needed to be arranged on the upper and lower bottom surfaces of the diversion tank 12, and the diameter of the through holes is slightly larger than that of the rotating shaft 5, so that the hole surface is close to but not in contact with the rotating shaft 5, if the strength of the rotating shaft 5 is insufficient, the rotating shaft 6 is driven to rotate and scrape mud, and the underwater bearings are needed to be installed in at least one and preferably two through holes on the upper and lower bottom surfaces of the diversion tank 12, so that the middle position of the rotating shaft 5 has a supporting point, and the rotating shaft 5 does not swing when rotating to scrape mud.

Referring to fig. 1 and 2, in an embodiment, the driving mechanism 4 includes a bridge driving device, a half-bridge driving device, and a combined driving device having a motor and a reducer, in the present invention, a half-bridge driving device is adopted, an upper free end of the rotating shaft 5 is connected to the driving mechanism 4, a lower free end is rotatably disposed in a central opening of the bottom wall 1 of the tank, bearings are mounted on the upper and lower free ends, and through holes for the rotating shaft 5 to pass through are formed on both the top surface and the bottom surface of the diversion tank 12, so that the rotating shaft 5 can rotate smoothly under the driving of the driving mechanism 4, and can support and fix the diversion tank 12 without affecting the normal operation of the diversion tank 12.

Referring further to fig. 1 to 3 and 7, in an embodiment, the tank bottom wall 1 is a plane, the tank bottom wall 1 is provided with a sludge collecting trench 1.1 along a radial direction, the sludge collecting trench 1.1 is preferably V-shaped, the second sludge discharging assembly includes a perforated sludge discharging pipe 9 disposed in the sludge collecting trench 1.1, it is known that a volume remaining after the V-shaped sludge collecting trench 1.1 is disposed with the perforated sludge discharging pipe 9 should be larger than a sludge deposition volume generated at an interval time between two adjacent sludge scraping operations of the sludge scraping mechanism 6, and a highest position of the perforated sludge discharging pipe 9 disposed in the V-shaped sludge collecting trench 1.1 should be lower than the plane of the tank bottom wall 1 so as not to block rotation of the sludge scraping mechanism 6. The aperture, position and number of the perforations on the perforated sludge discharge pipe 9 are required to ensure smooth sludge discharge under the condition of high solid content of sludge discharge water. The pond diapire 1 perhaps also can be established to the taper shape, and the bottom of pond diapire 1 is equipped with the mud discharging port 1.2 that communicates with the taper bottom, and the second row mud subassembly includes the mud pipe 10 that discharges with mud discharging port 1.2 intercommunication, and the slope of taper should satisfy when scraping mud, and the mud that sinks slides to the taper bottom along radial direction and discharges through mud discharging port 1.2 and mud pipe 10, and mud discharging port 1.2 and the size of discharging the mud hole all should satisfy the mud requirement. Therefore, according to actual needs, the bottom wall 1 of the tank may be formed in a planar shape or a conical shape, for example, when the bottom wall 1 of the tank receives a small amount of settled sludge, the bottom wall may be formed in a planar shape, and when the bottom wall receives a large amount of settled sludge, the bottom wall may be formed in a conical shape, which is advantageous for timely and reliable discharge of the settled sludge.

With further reference to fig. 2 and 5, in one embodiment, the mud scraping mechanism 6 comprises a sleeve 6.3 sleeved and fixed on the outer periphery of the rotating shaft 5 and a pair of mud scraping frames 6.1 and mud scraping plates 6.2 fixedly connected with the sleeve 6.3 and symmetrically arranged relative to the rotating shaft, for each pair of mud scraping frames 6.1 and mud scraping plates 6.2, the mud scraping plates 6.2 are in close proximity or contact with the upper surface of the settling plate 3 or the tank bottom wall 1 so as to scrape mud off the mud to the mud collecting hopper 8 or the perforated mud pipe 9 or the mud discharging port 1.2, the mud scraping frames 6.1 comprise a diagonal rod 6.11, preferably, a plurality of reinforcing rods 6.12 are arranged between the diagonal rod 6.11 and the mud scraping plates 6.2, the plurality of reinforcing rods 6.12 can increase the strength of the mud scraping frames 6.1 so as to ensure that the mud scraping plates 6.2 exert enough force on the mud to complete the mud scraping operation, one end of the diagonal rod 6.11 is fixedly connected with the rotating shaft 5 and the other end is connected with the mud scraping plates 6.2, and the other end of the fixed with the sleeve 6.3 and the frame 6.2, therefore, the sleeve 6.3 is driven by the rotating shaft 5 to synchronously rotate the mud scraping frame 6.1 so as to drive the mud scraping plate 6.2 to scrape mud, and the mud scraping frame 6.1 is uniformly fixed and applies the driving force to the mud scraping plate 6.2 in the whole radial direction of the settling plate 3 or the pool bottom wall 1, so that the mud scraping efficiency and the scraping rate are both high.

With further reference to fig. 2 and 3, in one embodiment the settling plates 3 are flat, the corresponding scraping plates 6.2 of each settling plate 3 are straight and scrape sludge into e.g. the sludge hopper 8 of the first sludge assembly, and for a flat bottom wall 1 of the tank, the corresponding pair of scraping plates 6.2 are arranged straight and close to the bottom wall 1 of the tank for scraping sludge into the perforated sludge pipes 9 in the sludge collection troughs 1.1, and for a conical bottom wall 1 of the tank, the corresponding pair of scraping plates 6.2 are arranged straight and close to the conical surface respectively and scrape sludge into the sludge discharge pipes 10 at the conical bottom, and further for a single scraping of a radial settling tank, in particular for a single rotation of the scraping plates 6.2, the entire time consumption of sludge is completed for one revolution of the sludge scraping, and for a single discharging of a radial settling tank, in particular for a single rotation of the perforated sludge discharge pipes 9 of the bottom wall 1 of the tank or for a single discharge pipe 10 of the sludge discharge pipes 3 or each settling tank 3 or each sludge discharge pipe The longer time consumption in the output time consumption, the sum of the time for scraping the mud and the time for discharging the mud is the total time of one time of mud discharging of the radial flow type sedimentation tank, and the number of times of completing the action of one time of mud scraping and one time of mud discharging in the whole day is the number of times of mud discharging of the radial flow type sedimentation tank. The sludge discharge period of the radial flow sedimentation tank is divided by the sludge discharge times within 24 hours, the number of reasonable sedimentation zones and the reasonable distance (water depth) between the sedimentation zones are set, the surface load of each layer of sedimentation plate 3 can be optimized, and the sedimentation rate of the radial flow sedimentation tank can be improved. In addition, the mud scraping period of the mud scraping device and the time for discharging mud need to be corrected according to different solid particles contained in raw water and different precipitation amount per unit time. According to the above, the plate-shaped settling plate 3 and the frame 3.1 form a sludge collecting disc, which can temporarily store the precipitated sludge and be scraped off by the linear sludge scraping plate 6.2 in a whole circle, and the sludge scraping plate 6.2 is also set into two linear shapes or two linear shapes with included angles which are positioned on the same straight line according to the shape of the tank bottom wall 1, so that the sludge on the tank bottom wall 1 can be completely scraped off in a whole circle or in a whole inner conical surface.

Referring to fig. 5, in an embodiment, two free ends of a mud scraper 6.2 disposed on each settling plate 3 are provided with circular arc baffles 6.21 which are concentric and abut against the inner surface of the frame 3.1, when the height of the frame 3.1 of the settling plate 3 is large, the effective water depth of the corresponding settling layer is affected, and the settling efficiency is affected; when the frame 3.1 is small in height, the mud can be deposited on the front side of the mud scraper 6.2 during mud scraping in a rotating mode, the mud can overflow from the frame 3.1, therefore, the arc baffles 6.21 are arranged at the two free ends of the mud scraper 6.2, and high precipitation efficiency can be obtained and the mud can be prevented from overflowing under the condition that the frame 3.1 of the settling plate 3 is small in height.

In one embodiment, the side of the mud scraper 6.2 facing the bottom wall 1 of the tank or the side of the settling plate 3 is provided with an elastic member (not shown) which is close to or in contact with the bottom wall, and the elastic member is made of rubber, plastic, silica gel or the like, so that the flexibility of the mud scraper 6.2 can be improved, and the mud can be prevented from being scraped and leaked to the rear of the mud scraper 6.2 during mud scraping.

In one embodiment, the pair of triangular faces 8.15 are inclined from top to bottom with respect to the vertical direction such that the hollow portion under the hollowed-out portion 8.12 is smaller than or equal to 60 degrees, and the included angle between the triangular faces 8.15 and the lower surface of the settling plate 3 is greater than or equal to 60 degrees, since the mud scraper 6.2 has pushed the sludge in front into the mud collection hopper 8 when the mud scraper 6.2 rotates to close to the inlet of the mud collection hopper 8, the sludge slides down from the settling plate 3, during the gliding process, the muddy water is mixed with the water in the mud collecting hopper 8 again and becomes muddy water, and the muddy water in the mud collecting hopper 8 flows back to the precipitation area because the mud scraped into the mud collecting hopper 8 occupies the space by squeezing, thereby influencing the precipitation quality of the precipitation area, therefore, by setting the pair of triangular faces 8.15 to be similar to a horn mouth shape with a large upper part and a small lower part, the condition that the sediment can smoothly enter the sediment hopper 8 and slide by the self gravity is met, the backflow of turbid water is avoided, and the sediment quality of the sediment zone is improved.

In an embodiment, the mud pipe is the pipe, and sharp apex angle is cut off partial formation square cross section, and knowably is, and centre bore 3.2 is pressed close to another sharp apex angle, through for example the reducing pipe of circle under the welded fastening top between square cross section and the pipe, welds mutually with the square cross section part of mud pipe and sharp apex angle respectively through the both ends of reducing pipe, has guaranteed the sealed fixed connection of mud pipe with sharp apex angle, has prevented revealing of heavy mud.

In one embodiment, the height of the frame 3.1 is H, the sludge deposition volume at the interval between two times of sludge scraping of the sludge scraping device is V, V is obtained by calculating the sludge amount according to the raw water turbidity and the treated raw water amount and then calculating the sludge solid content, the area of the settling plate 3 bearing the sludge is S, and satisfies the following conditions: h is more than V/S, therefore, under the condition that H meets the above conditions, the volume enclosed by the mud collecting disc formed by the frame 3.1 and the settling plate 3 is slightly larger than the volume of the settled mud temporarily stored on the settling plate 3 generated by the interval time of two mud scraping operations, and the condition that the settled mud overflows out of the settling plate 3 due to the increase of the settled mud is avoided.

With further reference to fig. 1, in one embodiment, the bottom surface of the inlet pipe 11 of the surrounding wall 2, which is located closest to the bottom wall 1 of the tank, more particularly where the inlet pipe 11 meets the above-mentioned branch pipes 14, is provided with piers 15, the number of piers 15 being set to be the same as the number of branch pipes 14, whereby, by providing each pier 15, support of each branch pipe 14 and its associated inlet pipe 11 is provided and thus the support of the settlement plate 3 is increased.

With further reference to fig. 6, in an embodiment, a plurality of concentric circular cross-arms 16 are fixed to the lower surface of each settling plate 3 for pressing each water inlet pipe 11 against the lower surface, such that each concentric circular cross-arm 16 increases the supporting force for each settling plate 3 and corresponding each water inlet pipe 11.

It should be added that the radial sedimentation tank of the present invention is described by taking three layers of sedimentation zones as an example, and in addition, when the small micro radial sedimentation tank applied to the radial sedimentation tank is assembled, the sedimentation plate, the mud collecting hopper, the water inlet pipe and the shunt tank can be assembled together to form a frame, and then the frame is assembled together with the rotating shaft, the mud scraping frame and the mud scraping plate, and finally the frame is clamped or fixed on the cylindrical tank body of the circumferential wall, and the frame and the mud scraping plate can be lifted out together when the maintenance is required.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and any modifications, equivalents, and improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (10)

1. A radial flow sedimentation tank, comprising:

a tank bottom wall and a tank peripheral wall extending in a vertical direction which together define a flow space for the water flow;

the sedimentation plates are arranged in the flow space and are sequentially stacked at intervals, the bottom wall of the pool and the adjacent sedimentation plates as well as the adjacent sedimentation plates are layered into a sedimentation layer, the outer periphery of each sedimentation plate is provided with a frame extending perpendicular to the bottom wall of the pool, and a water passing gap is arranged between the frame and the peripheral wall of the pool;

the sludge scraping device comprises a driving mechanism and a rotating shaft which are in driving connection and a plurality of sludge scraping mechanisms which are fixedly connected with the rotating shaft, the sludge scraping mechanisms are arranged on the bottom wall of the tank and each settling plate, and the driving mechanism drives the rotating shaft to rotate so as to drive each sludge scraping mechanism to periodically and synchronously rotate on the corresponding bottom wall of the tank or the upper surface of the settling plate to scrape sludge;

the water collecting tank is arranged at the top of the peripheral wall of the pool and communicated with the top of the flowing space;

a plurality of water inlet units provided corresponding to each of the precipitation layers to guide raw water into the flow space;

a first sludge discharge assembly provided to a lower surface of each of the settling plates to receive the corresponding sludge and discharge the sludge out of the flow space;

and the second sludge discharge assembly is arranged below the bottom wall of the pool to receive corresponding settled sludge and discharge the settled sludge to the outside of the flowing space.

2. A radial flow sedimentation tank according to claim 1,

the peripheral wall of the pool and the plurality of the sedimentation plates are provided with the same central axis, and the rotating center line of the rotating shaft is superposed with the central axis;

the first sludge discharge assembly comprises a plurality of sludge collecting hoppers, one sludge collecting hopper is fixed on the lower surface of each settling plate relative to the water outlet direction, each sludge collecting hopper comprises a hollow right-angle triangular cavity, each right-angle triangular cavity comprises a long right-angle surface where a pair of long right-angle sides are located, an oblique angle surface where a pair of oblique edges are located, a short right-angle surface where a pair of short right-angle sides are located, a triangular surface where the pair of long right-angle sides, the short right-angle sides and the oblique edges are located together, and each long right-angle surface is provided with a hollow part for receiving settled sludge;

the settling plate is provided with a central hole and an opening extending from the central hole along the radial direction, and the opening is mutually butted with the hollow part;

the acute apex angle department of the right angle triangle-shaped cavity sets up a mud pipe, each the mud pipe all passes the pond perisporium is linked together with external collection mud pond, perhaps, is used for excreting more than the lower floor the each of the heavy mud of settlement plate the mud pipe all through the water clearance that corresponds the sedimentation layer and all with be used for excreting the pipe orifice of the mud pipe of the heavy mud of the lower floor settlement plate and be connected the house steward of a heavy-calibre together, just the house steward passes the pond perisporium is linked together with external collection mud pond.

3. A radial flow sedimentation tank according to claim 1,

the subassembly of intaking includes many inlet tubes and a plurality of reposition of redundant personnel jar, every the inlet tube all is linked together with the water inlet manifold, each the reposition of redundant personnel jar is all worn to locate in the pivot, the equipartition is put one in every settling zone the reposition of redundant personnel jar.

4. A radial flow sedimentation tank according to claim 3,

the settling zone is including being located the pond diapire with lower settling zone between the adjacent settling plate, be located two liang of adjacent settling plates between well settling zone and being located nearest pond perisporium top the last settling zone above the settling plate in last settling zone, the reposition of redundant personnel jar is located rather than adjacent the top of settling plate and be less than the notch of water catch bowl well settling zone with in the settling zone down, each the top surface butt of reposition of redundant personnel jar is adjacent the lower surface of settling plate just the centre bore of settling plate is located within the top surface periphery wall of reposition of redundant personnel jar, corresponding to every each inlet tube of reposition of redundant personnel jar is radially evenly set up with the central axis as the center, each the below of settling plate is by each the inlet tube with the top surface of reposition of redundant personnel jar is supported.

5. A radial flow sedimentation tank according to claim 3,

bearing perhaps under the through-hole assembly water of the bottom surface of reposition of redundant personnel jar the number that the number of thick step shaft and ladder face equals the reposition of redundant personnel jar under the pivot was established to the fineness, the ladder face activity is supported adjacently the bottom surface of reposition of redundant personnel jar sets up the abrasive pad on and.

6. A radial flow sedimentation tank according to claim 3,

the driving mechanism comprises a bridge type driving device, a half-bridge type driving device and a combined driving device with a motor and a speed reducer, the upper free end of the rotating shaft is connected with the driving mechanism, the lower free end of the rotating shaft is rotatably arranged in the central hole of the bottom wall of the pool, bearings are arranged at the upper free end and the lower free end of the rotating shaft, and through holes for the rotating shaft to pass through are formed in the top surface and the bottom surface of the shunt tank.

7. A radial flow sedimentation tank according to claim 1,

the tank bottom wall is planar, a sludge collecting ditch is arranged on the tank bottom wall along the radial direction, and the second sludge discharge assembly comprises a perforated sludge discharge pipe arranged in the sludge collecting ditch, or

The bottom wall of the pool is conical, a sludge discharge port communicated with the conical bottom is formed in the bottom of the bottom wall of the pool, and the second sludge discharge assembly comprises a sludge discharge pipe communicated with the sludge discharge port.

8. A radial flow sedimentation tank according to claim 7,

the mud scraping mechanism comprises a sleeve fixedly arranged on the periphery of the rotating shaft and a pair of mud scraping frames and mud scraping plates which are symmetrically arranged relative to the rotating shaft, wherein the mud scraping frames and the mud scraping plates are fixedly connected with the sleeve respectively in a sleeved mode, each mud scraping frame comprises an inclined rod, one end of each inclined rod is fixedly connected with the sleeve, the other end of each inclined rod is fixed to the mud scraping plates, and one end of each mud scraping plate is close to the frame through the sleeve fixedly connected with the other end of the mud scraping plate.

9. A radial flow sedimentation tank according to claim 8,

the settlement plate is dull and stereotyped shape, each the settlement plate corresponds the mud scraping plate is for sharply appearing and will sink mud and scrape in among the first mud discharging component, for when the pond diapire is the plane shape, it is a pair of to correspond the mud scraping plate arrange for sharply and with thereby the pond diapire is pressed close to or the contact will sink mud and is scraped in the collection mud ditch in the perforation mud discharging pipe, work as when the pond diapire is conical, it is a pair of to correspond the mud scraping plate arrange for two straight line clip angular shapes and press close to or the contact with the conical surface respectively and will sink mud and scrape into in the mud pipe that lets out of conical bottom department.

10. A radial flow sedimentation tank according to claim 1,

two free ends of a mud scraper configured on each settling plate are respectively provided with an arc baffle which is abutted against the inner surface of the frame and is concentric with the inner surface of the frame.

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