Water collection component, sedimentation tank and sewage treatment system

Abstract

The present invention relates to the technical field of sewage treatment, and provides a water collection component, a sedimentation tank and a sewage treatment system. The water collection component includes: a weir trough; a weir plate hinged to the side wall of the weir trough; a limiting member fixed to the side wall of the weir trough for restricting the weir plate in the vertical position when the weir plate rotates in a set direction. Since the weir plate is hinged to the side wall of the weir trough, the weir plate can rotate relative to the side wall of the weir trough to adjust the height of the weir plate relative to the weir trough. When the flow rate and the flow volume in the corresponding area of the current weir trough are fast and large, the height of the weir plate can be increased by rotating the weir plate. When the flow rate and the flow volume in the corresponding area of the current weir trough are slow and small, the height of the weir plate can be decreased by rotating the weir plate. Therefore, when this water collection component is installed in the sedimentation tank of the sewage treatment system, the water outlet of the sedimentation tank can be ensured to be uniform, the sediment and magnetic powder can be prevented from being carried away by the water outlet, and the water quality of the water outlet can be guaranteed to the greatest extent and the operation cost can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and particularly to a water collection component, a sedimentation tank, and a sewage treatment system. Background Art

[0002] As a new emerging technology for advanced sewage treatment, the magnetic coagulation sedimentation tank has been increasingly applied because it can efficiently remove SS (suspended solids in water) and dissolved phosphorus. A typical process flow of the advanced sewage treatment technology based on the magnetic coagulation sedimentation tank is as follows: Please refer to Figure 1 , the water to be treated sequentially enters a coagulation tank 001 (adding a coagulant for coagulation), a magnetic powder dosing tank 002 (adding a flocculant and magnetic powder, using the magnetic powder as a heavy medium / nucleus to improve the sedimentation efficiency of pollutants), a flocculation tank 003 (fully flocculating the substances to be separated to form larger alum flowers, which is more conducive to sedimentation), and a sedimentation tank 004 (the pollutants are removed by sedimentation, and the clear water is collected by each water collecting tank above and then flows out). Generally, the coagulation tank 001, the magnetic powder dosing tank 002, the flocculation tank 003, and the sedimentation tank 004 are designed as an even series and operated in parallel to facilitate single-tank maintenance and emergency switching.

[0003] In the process design, the ideal water distribution and water outlet of the sedimentation tank 004 are both uniform. Each water collecting tank at the top of the sedimentation tank 004 should discharge water evenly at the same flow rate, so that the water outlet is stable and a good treatment effect is achieved. However, in actual operation, due to various reasons, the water outlet cannot reach the standard stably, and the water flow at the place with a large flow rate will carry away some sediments and magnetic powder deposited at the bottom of the tank, affecting the water outlet quality. If the intermediate water containing magnetic powder is reused, it may cause other equipment failures. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. For this purpose, the present invention provides a water collection component. When this water collection component is applied to a sewage treatment system, the height of the weir plate above different weir troughs can be adjusted by adjusting the height of the weir plate, so that the water outlet of the sewage treatment system is as uniform as possible, ensuring the water outlet quality and avoiding subsequent equipment failures.

[0005] The present invention also provides a sedimentation tank.

[0006] The present invention also provides a sewage treatment system.

[0007] The water collection component according to the first aspect embodiment of the present invention includes:

[0008] A weir trough;

[0009] A weir plate, hinged to the side wall of the weir trough;

[0010] The limiting member is fixed to the side wall of the weir trough and is used to limit the weir plate in the vertical position when the weir plate rotates in a set direction.

[0011] For the water collection assembly according to an embodiment of the present invention, since its weir plate is hinged to the side wall of the weir trough, the weir plate can rotate relative to the side wall of the weir trough, and as the weir plate rotates, the height of the weir plate relative to the weir trough can be adjusted. Among them, when the flow rate and the flow volume in the corresponding area of the current weir trough are fast and large, the height of the weir plate can be increased by rotating the weir plate to reduce the water output of the current weir trough, avoid taking away sediment and magnetic powder, and ensure stable water output. When the flow rate and the flow volume in the corresponding area of the current weir trough are slow and small, the height of the weir plate can also be reduced by rotating the weir plate to appropriately increase the water output of the current weir trough. Furthermore, when this water collection assembly is installed in the sedimentation tank of the sewage treatment system, it can be used to ensure uniform water output of the sedimentation tank, avoid the water output from taking away sediment and magnetic powder, and maximize the protection of the water quality of the water output and reduce the operation cost.

[0012] According to an embodiment of the present invention, the weir trough has a first side wall and a second side wall arranged opposite to each other;

[0013] The limiting member includes a first limiting member fixed to the first side wall and a second limiting member fixed to the second side wall;

[0014] The weir plate includes a first weir plate hinged to the first side wall and a second weir plate hinged to the second side wall. The first limiting member is used to limit the weir plate in the vertical position when the first weir plate rotates in the positive direction, and the second limiting member is used to limit the weir plate in the vertical position when the second weir plate rotates in the positive direction.

[0015] According to an embodiment of the present invention, the weir plate and the side wall of the weir trough are hinged through a plurality of hinges, and a water stop strip is arranged between the plurality of hinges;

[0016] The water collection assembly further includes a support member, and the support member is arranged on the weir plate along the length direction of the weir plate.

[0017] According to the sedimentation tank of the second aspect embodiment of the present invention, it includes a sedimentation tank body, and the sedimentation tank further includes:

[0018] The above water collection assembly, and the water collection assembly is installed in the sedimentation tank body;

[0019] A fixed pulley assembly, including a fixed pulley and a cable, the fixed pulley is installed on the side wall of the sedimentation tank, one end of the cable is wound around the fixed pulley, and the other end is connected to the weir plate.

[0020] For the sedimentation tank according to the present invention, since it includes the above water collection assembly, it has all the technical effects of the above water collection assembly, which will not be elaborated here.

[0021] According to an embodiment of the present invention, the fixed pulley assembly further includes:

[0022] A first handle fixedly connected to the fixed pulley to drive the fixed pulley to rotate, so that the weir plate rotates relative to the side wall of the weir trough;

[0023] A first positioning portion fixed to the side wall of the sedimentation tank, and a plurality of first positioning holes are formed in the first positioning portion and distributed along the circumferential direction of the fixed pulley;

[0024] A second positioning portion fixed to the fixed pulley and having a second positioning hole formed therein;

[0025] A positioning bolt for inserting into the second positioning hole and one of the first positioning holes to lock the first positioning portion and the second positioning portion.

[0026] The sewage treatment system according to the third aspect embodiment of the present invention includes the above-mentioned sedimentation tank.

[0027] The sewage treatment system according to the present invention includes the above-mentioned sedimentation tank, and thus has all the technical effects of the above-mentioned sedimentation tank, which will not be elaborated here.

[0028] According to an embodiment of the present invention, it further includes:

[0029] A flocculation tank provided upstream of the sedimentation tank;

[0030] A rectifying grid assembly installed in the water passage between the flocculation tank and the sedimentation tank, including a plurality of grid bars with adjustable diversion directions.

[0031] According to an embodiment of the present invention, the rectifying grid assembly further includes:

[0032] A mounting frame;

[0033] A frame hinged to the mounting frame, and the frame is formed with an insertion slot for the grid bars.

[0034] According to an embodiment of the present invention, the frame includes:

[0035] A rectangular frame formed with the insertion slot;

[0036] A square longitudinal beam fixed to the long side of the rectangular frame;

[0037] A round rod fixed to the top end of the square longitudinal beam;

[0038] A third positioning portion fixed to the round rod and having a third positioning hole formed therein;

[0039] The rectifying grid assembly further includes:

[0040] The fourth positioning part is fixed to the mounting frame and is formed with a plurality of fourth positioning holes distributed along the rotation direction of the grid bars;

[0041] The limit bolt is used to insert into the third positioning hole and one of the fourth positioning holes to lock the third positioning part and the fourth positioning part.

[0042] According to an embodiment of the present invention, the frame further includes:

[0043] The positioning column is fixed to the bottom end of the square longitudinal beam;

[0044] The mounting frame is formed with a mounting hole for mounting the positioning column, and the mounting hole and the positioning column are in clearance fit so that the positioning column can rotate relative to the mounting hole.

[0045] The additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present invention. Description of the Drawings

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0047] Figure 1 is a schematic structural diagram of a sewage treatment system in the prior art;

[0048] Figure 2 is an installation schematic diagram of the water collection assembly in the embodiment of the present invention;

[0049] Figure 3 is Figure 2 a cross-sectional schematic diagram taken along line A-A in

[0050] Figure 4 is Figure 2 a partial enlarged schematic diagram at I in

[0051] Figure 5 is a schematic structural diagram of the rectifying grid assembly in the embodiment of the present invention;

[0052] Figure 6 is Figure 5 a cross-sectional schematic diagram taken along line B-B in

[0053] Figure 7 is Figure 5 a partial enlarged schematic diagram at II in

[0054] Figure 8 is a schematic structural diagram of the sewage treatment system according to an embodiment of the present invention;

[0055] Reference numerals:

[0056] 001, coagulation tank; 002, magnetic powder dosing tank; 003, flocculation tank; 004, sedimentation tank;

[0057] 100, water collection assembly; 1, first positioning part; 2, second positioning part; 3, positioning bolt; 4, first handle; 5, fixed pulley; 6, cable; 7, weir plate; 8, support member; 9, water stop strip; 10, hinge; 11, limiting member;

[0058] 200, rectifying grid assembly; 01, rectangular frame; 02, second handle; 03, mounting bracket; 04, third positioning part; 05, fourth positioning part; 06, round rod; 07, limiting bolt; 08, square longitudinal beam; 09, grid bars; 010, mounting part; 011, positioning column. Detailed implementation manners

[0059] The following further describes in detail the implementation manners of the present invention in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0060] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the embodiments of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0061] In the description of the embodiments of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific situations.

[0062] In the embodiments of the present invention, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal height of the first feature is less than that of the second feature.

[0063] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0064] Please refer to Figure 1 , a sewage treatment system, which is sequentially provided with a coagulation tank 001, a magnetic powder dosing tank 002, a flocculation tank 003 and a sedimentation tank 004 along the water flow direction. Among them, a weir trough (i.e., a water collection trough) is arranged in the sedimentation tank 004, and a weir plate 7 is arranged above the weir trough.

[0065] Since the water flow is stirred by a flocculation stirrer in the flocculation tank 003 before entering the sedimentation tank 004 from the flocculation tank 003, the water flow does not enter and distribute water evenly along the width direction of the sedimentation tank 004 when entering the sedimentation tank 004, but enters the sedimentation tank 004 with a tangential velocity, as Figure 1 shown by the arrow in. Thus, the water flow velocity in some areas of the sedimentation tank 004 is relatively fast, and short-circuit flow or undercurrent may be formed in this part of the area; the water flow in another part of the area is relatively slow.

[0066] In addition, due to actual limitations such as the land for upgrading and transformation of sewage treatment plants, the layout of the newly built magnetic coagulation sedimentation tank will be affected, and the positions of the water passing channels from the flocculation tank 003 to the sedimentation tank 004 in different series connected in parallel (each series includes a coagulation tank 001, a magnetic powder dosing tank 002, a flocculation tank 003 and a sedimentation tank 004) may be different, as Figure 1As shown, it causes different actual undercurrent flow patterns in the sedimentation tanks 004 of different series, resulting in inconsistent effluent stability of the parallel series.

[0067] Furthermore, when some magnetic coagulation sedimentation tanks are used for advanced treatment with the front-end treatment process being "sequencing batch reactor activated sludge process", since the timing effluent of each unit in the front-end system is not completely seamlessly connected during the switching, the influent water volume of the magnetic coagulation sedimentation tank shows periodic changes. The water volume is large at the initial stage of decanting in the front-end treatment process and small at the later stage, thus affecting the effluent stability of the sewage treatment system.

[0068] Due to the above various reasons, it may cause slow flow velocity and small flow volume in the area close to the water passage, while in the area far from the water passage, on the contrary, the flow velocity is fast and the flow volume is large under the action of water flow inertia. Moreover, the flow velocity and flow volume of the collection tank first touched by the undercurrent are fast and large, and as the undercurrent gradually dissipates energy, both the flow velocity and flow volume decrease. Among them, the effluent from the collection tank with the largest flow volume will carry away part of the sediment and magnetic powder deposited at the bottom of the tank, resulting in the inability to stably meet the effluent standards. In addition, the effluent of the sewage treatment system is usually used as reclaimed water in the sewage treatment plant area, and the high content of suspended solids and magnetic powder in the effluent also causes failures of other equipment using reclaimed water.

[0069] For all the above reasons, an embodiment of the first aspect of the present invention provides a water collection assembly 100. Please refer to Figures 2 to 4 , which includes a weir trough, a weir plate 7 and a limiting member 11. Among them, the weir plate 7 is hinged to the side wall of the weir trough; the limiting member 11 is fixed to the side wall of the weir trough and is used to limit the weir plate 7 in the vertical position when the weir plate 7 rotates in a set direction.

[0070] For the water collection assembly 100 according to the embodiment of the present invention, since the weir plate 7 is hinged to the side wall of the weir trough, the weir plate 7 can rotate relative to the side wall of the weir trough, and as the weir plate 7 rotates, the height of the weir plate 7 relative to the weir trough can be adjusted. Among them, when the flow velocity and flow volume in the corresponding area of the current weir trough are fast and large, the height of the weir plate 7 can be increased by rotating the weir plate 7 to reduce the water output of the current weir trough, avoid carrying away sediment and magnetic powder, and ensure stable effluent. When the flow velocity and flow volume in the corresponding area of the current weir trough are slow and small, the height of the weir plate 7 can also be reduced by rotating the weir plate 7 to appropriately increase the water output of the current weir trough. Furthermore, when this water collection assembly 100 is installed in the sedimentation tank 004 of the sewage treatment system, it can be used to ensure uniform effluent from the sedimentation tank 004, avoid the effluent from carrying away sediment and magnetic powder, and maximize the guarantee of effluent quality and reduction of operating costs.

[0071] In one embodiment, the weir tank has a first side wall and a second side wall which are oppositely arranged; the limiting member 11 includes a first limiting member fixed to the first side wall and a second limiting member fixed to the second side wall, and the weir plate 7 includes a first weir plate hinged to the first side wall and a second weir plate hinged to the second side wall. Further, the positions of the first weir plate and the second weir plate are limited by the first limiting member and the second limiting member to adjust the water collection capacity of the current weir tank.

[0072] Please refer to Figure 3 , the first limiting member on the left is located outside the first side wall. Thus, when the first weir plate is in the vertical position, the first limiting member can limit the counterclockwise rotation of the first weir plate. The second limiting member on the right is located outside the second side wall. Thus, when the second weir plate is in the vertical position, the second limiting member can limit the clockwise rotation of the second weir plate. That is, Figure 3 In, both the first weir plate and the second weir plate can rotate towards each other to achieve the purpose of adjusting their own heights.

[0073] In another embodiment, different from Figure 3 In the case of, one of the first limiting member and the second limiting member is arranged on the inner side wall of the weir tank, and the other of the first limiting member and the second limiting member is arranged on the outer side wall of the weir tank. For example, the first limiting member on the left is arranged on the inner side of the first side wall to prevent the first weir plate on the left from continuing to rotate clockwise after reaching the vertical position; the second limiting member on the right is arranged on the outer side wall of the weir tank to prevent the second weir plate on the right from continuing to rotate clockwise after reaching the vertical position. In this case, the rotation directions of the first weir plate and the second weir plate are the same, and thus interference between the first weir plate and the second weir plate is impossible.

[0074] In one embodiment, the weir plate 7 is hinged to the side wall of the weir tank through a plurality of hinges 10, and a water stop strip 9 is arranged between the plurality of hinges 10. Among them, the water stop strip 9 seals the gap between the weir plate 7 and the side wall of the weir tank to prevent pool water from flowing into the weir tank through the gap. The water stop strip 9 here can be a rubber water stop strip 9.

[0075] In one embodiment, the weir plate 7 is a triangular weir plate 7.

[0076] In one embodiment, since the weir plate 7 is relatively long and prone to deflection, a support member 8 is arranged along the length direction of the weir plate 7 to ensure that the weir plate 7 is straight.

[0077] In one embodiment, the support member 8 can be a slender rod with a certain structural strength and can be fixed to the weir plate 7 by welding.

[0078] According to an embodiment of the second aspect of the present invention, a sedimentation tank 004 is provided, which includes a sedimentation tank body, the water collection assembly 100 mentioned in the above embodiment, and a fixed pulley assembly. Among them, the water collection assembly 100 is installed inside the sedimentation tank body; the fixed pulley assembly includes a fixed pulley 5 and a cable 6. The fixed pulley 5 is installed on the side wall of the sedimentation tank 004, and one end of the cable 6 is wound around the fixed pulley 5, and the other end is connected to the weir plate 7. Among them, the situation where the other end of the cable 6 is connected to the weir plate 7 includes the situation where the cable 6 is indirectly connected to the weir plate 7 through a support member 8.

[0079] For the sedimentation tank 004 according to an embodiment of the present invention, the height of the weir plate 7 in the water collection assembly 100 is adjusted through the fixed pulley assembly, and this adjustment method is simple and easy to operate. Please refer to Figures 2 to 4 , as the fixed pulley 5 rotates, the cable 6 is wound and unwound, thereby adjusting the angle of the weir plate 7.

[0080] In one embodiment, the cable 6 is a steel wire rope. The first end of the steel wire rope is wound around the fixed pulley 5, and the second end is connected to the support member 8.

[0081] In one embodiment, the fixed pulley assembly further includes a first handle 4, a first positioning portion 1, a second positioning portion 2, and a positioning bolt 3. Among them, the first handle 4 is fixedly connected to the fixed pulley 5 to drive the fixed pulley 5 to rotate, so that the weir plate 7 rotates relative to the side wall of the weir trough. The first positioning portion 1 is fixed on the side wall of the sedimentation tank 004, and the first positioning portion 1 is formed with a plurality of first positioning holes distributed along the circumferential direction of the fixed pulley 5; the second positioning portion 2 is fixed on the fixed pulley 5 and is formed with a second positioning hole; the positioning bolt 3 is used to insert into the second positioning hole and one of the first positioning holes to lock the first positioning portion 1 and the second positioning portion 2.

[0082] Of course, it is also possible to form only one first positioning hole in the first positioning portion 1 and a plurality of second positioning holes distributed along the circumferential direction of the fixed pulley 5 in the second positioning portion 2; or it is also possible to form a plurality of first positioning holes distributed along the circumferential direction of the fixed pulley 5 in the first positioning portion 1 and a plurality of second positioning holes distributed along the circumferential direction of the fixed pulley 5 in the second positioning portion 2. Since at least one of the first positioning hole and the second positioning hole is a plurality and is distributed along the circumferential direction of the fixed pulley 5, as the fixed pulley 5 rotates, it can always be ensured that one first positioning hole and the second positioning hole can be aligned. Then, when the positioning bolt 3 passes through the first positioning hole and the second positioning hole, the locking of the first positioning portion 1 and the second positioning portion 2 can be realized to ensure that the fixed pulley 5 is fixed at the current position. After the fixed pulley 5 is fixed, the angle of the weir plate 7 is also fixed accordingly.

[0083] Among them, for one weir plate 7, both ends thereof are connected to the side wall of the sedimentation tank 004 through the fixed pulley assembly. Please refer to Figure 2By synchronously adjusting the fixed pulley assemblies at both ends of the weir plate 7, the flat rotation of the weir plate 7 can be ensured.

[0084] In one embodiment, the position of the fixed pulley 5 is located slightly lower than the pool wall of the walkway bridge, so that the operator can complete the adjustment of the water level height of each weir trough when walking on the bridge. Of course, in addition to manually adjusting the height of the weir plate 7 by rotating the first handle 4, the height of the weir plate 7 can also be automatically controlled by motor drive or other drive methods.

[0085] According to an embodiment of the third aspect of the present invention, a sewage treatment system is provided, which includes the sedimentation tank 004 mentioned above.

[0086] The sewage treatment system according to the embodiment of the present invention can adjust the water output of each weir trough, ensure the stable water output of the sedimentation tank 004, and avoid the entry of sediment, magnetic powder, etc. carried by the water into subsequent equipment.

[0087] In one embodiment, the sewage treatment system includes a flocculation tank 003 arranged upstream of the sedimentation tank 004. In addition, a rectifying grid assembly 200 is installed at the water passage between the flocculation tank 003 and the sedimentation tank 004, and the rectifying grid assembly 200 includes a plurality of grid bars 09 with adjustable diversion directions. By arranging the rectifying grid assembly 200, the flow state of the water flowing from the flocculation tank 003 into the sedimentation tank 004 can be made more uniform, and the occurrence of short-circuit flow phenomena in the sedimentation tank 004 can be avoided or reduced.

[0088] In one embodiment, please refer to Figures 5 to 7 , the rectifying grid assembly 200 further includes a mounting frame 03 and a frame. Among them, the frame is hinged to the mounting frame 03, and the frame is formed with an insertion slot for the grid bar 09. Furthermore, by installing the grid bar 09 in the insertion slot, the replacement of the grid bar 09 can be facilitated. And by hinging the frame to the mounting frame 03, the frame can drive the grid bar 09 to rotate relative to the mounting frame 03 to achieve the diversion purpose.

[0089] In one embodiment, the frame includes a rectangular frame 01, a square longitudinal beam 08, a round rod 06, and a third positioning part 04. The rectifying grid assembly 200 further includes a fourth positioning part 05 and a limit bolt 07. Among them, the rectangular frame 01 is formed with the insertion slot; the square longitudinal beam 08 is fixed to the long side of the rectangular frame 01; the round rod 06 is fixed to the top of the square longitudinal beam 08; the third positioning part 04 is fixed to the round rod 06 and is formed with a third positioning hole; the fourth positioning part 05 is fixed to the mounting frame 03 and is formed with a plurality of fourth positioning holes distributed along the rotation direction of the grid bar 09; the limit bolt 07 is used to insert into the third positioning hole and one of the fourth positioning holes to lock the third positioning part 04 and the fourth positioning part 05.

[0090] In one embodiment, please refer toFigure 5 and Figure 7 The fourth positioning portion 05 is fan-shaped, and a plurality of fourth positioning holes are provided in the fourth positioning portion 05, so as to ensure that as the frame rotates to different positions, the third positioning hole can be aligned with one of the fourth positioning holes, and further ensure that after the limit bolt 07 is inserted into the third positioning hole and the fourth positioning hole, locking between the third positioning portion 04 and the fourth positioning portion 05 can be achieved.

[0091] Among them, the square longitudinal beam 08 and the long side of the rectangular frame 01 can be fixed by welding. And the reason for using the square longitudinal beam 08 is mainly to facilitate the fixation with the rectangular frame 01. Obviously, the square longitudinal beam 08 can also be replaced by beams with other cross-sectional shapes. In addition, the round rod 06 is fixed to the top end of the square longitudinal beam 08, so as to ensure that the round rod 06 will not wear the mounting bracket 03 during the rotation of the frame.

[0092] In one embodiment, the frame further includes a positioning column 011, and the positioning column 011 is fixed to the bottom end of the square longitudinal beam 08; the mounting bracket 03 is formed with a mounting hole for mounting the positioning column 011, and the mounting hole and the positioning column 011 are in clearance fit so that the positioning column 011 can rotate relative to the mounting hole.

[0093] In one embodiment, at the top end of the round rod 06, that is, at the end of the round rod 06 away from the square longitudinal beam 08, a second handle 02 is connected, and the rotation direction of the frame is adjusted through the second handle 02 to adjust the flow guiding direction of the grating bars 09.

[0094] When the water flow of the sewage treatment system based on the embodiment of the present invention passes through the water passage from the flocculation tank 003 to the sedimentation tank 004, under the action of the grating bars 09, the initial swirling state is changed, and it flows into the sedimentation tank 004 in accordance with the preset direction of the grating bars 09, achieving the purpose of uniform water distribution.

[0095] In order to improve the corrosion resistance of the rectifying grating assembly 200, the mounting bracket 03 and the frame are made of stainless steel. In order to maintain the lightness of the adjustment function, the grating bars 09 are made of ABS (terpolymer of acrylonitrile, butadiene, and styrene) plastic material. The insertion slot of the rectangular frame 01 is a three-sided slot structure, and the grating bars 09 can be placed into the insertion slot from the top. The grating bars 09 are movable components, which is convenient for maintenance and replacement.

[0096] In order to facilitate exploring the best flow pattern of the sedimentation tank 004 and adapting to different tank type layout methods, all the grating bars 09 of the rectifying grating assembly 200 are adjustable in direction.

[0097] In one embodiment, the second handle 02, the third positioning portion 04, the round rod 06, the square longitudinal beam 08, and the positioning column 011 are integrated components and are welded to the rectangular frame 01. By operating the second handle 02, the direction of the grid bar 09 can be changed. The fourth positioning portion 05 is welded and fixed to the mounting bracket 03. After adjusting the direction of the grid bar 09, the third positioning hole of the third positioning portion 04 is aligned with the fourth positioning hole of the fourth positioning portion 05, and the limiting bolt 07 is inserted to fix the direction of the grid bar 09. The mounting hole can be formed in the mounting portion 010. The mounting portion 010 is welded and fixed to the mounting bracket 03. The diameter of the mounting hole is slightly larger than the diameter of the positioning column 011, so that the positioning column 011 can just be inserted into the mounting hole to achieve the positioning of each grid bar 09.

[0098] There are various fixing methods between the mounting bracket 03 and the pool wall. For example, a limiting channel steel can be added to the pool wall to form a track, so that the mounting bracket 03 can slide along the track and be fixed; for another example, the mounting bracket 03 can be directly fixed to the pool wall with limiting buckles and expansion bolts. Among them, the mounting bracket 03 can be in the form of a steel frame.

[0099] Due to the special function of the flocculation tank 003, there are a large number of flocculent alum flowers in the water flow flowing from the flocculation tank 003 to the sedimentation tank 004. The formation of the alum flowers ensures a better sedimentation effect. Experiments have proved that too high a water flow velocity will cause the destruction of the alum flowers, thus affecting the operation effect of the system. After testing, during the tangential water inlet process, when the flow velocity is controlled within 0.7 m / s, the alum flowers are less affected, and when it is higher than 0.8 m / s, fragmentation will occur. After calculation, the flow velocity through the rectifying grid assembly 200 is much lower than 0.7 m / s, so it will not affect the alum flowers.

[0100] The above rectifying grid assembly 200 can be directly applied to the transformation of the existing magnetic coagulation system (i.e., the sewage treatment system based on the magnetic coagulation sedimentation tank), and is installed at the water passing channels of the flocculation tank 003 and the sedimentation tank 004 in each series, playing the role of rectifying and evenly distributing water.

[0101] According to the sewage treatment system of the embodiment of the present invention, based on different application scenarios, the optimal adjustment scheme of the grid bar 09 can be determined based on a limited number of tests. By flexibly adjusting the rectifying grid assembly 200 and the water collection assembly 100, different projects can explore the operation modes suitable for their own characteristics, form more stable hydraulic conditions, thereby reducing the usage amount of chemicals (such as flocculants, magnetic powders, and coagulants, etc.) during daily operation and emergency treatment, and reducing the operation cost.

[0102] For the sewage treatment system according to the embodiments of the present invention, the use of the adjustable rectifying grid assembly 200 can change the swirling state of the original influent water in the sedimentation tank 004, make the water distribution in the sedimentation tank 004 more uniform, make full use of the tank width and tank length of the sedimentation tank 004, enable the water flow entering the sedimentation tank 004 to dissipate energy in advance, avoid stirring up the pollutants that have settled at the bottom of the tank due to the influence of the undercurrent, and thus obtain a more stable treatment effect. Uniform water distribution can also make the sewage treatment system have a stronger anti-shock load capacity, which is conducive to coping with the unstable influent at the front end. The direction of the grid bars 09 can be adjusted on the walkway platform, which is convenient for operation.

[0103] The application of the water collection assembly 100 can adjust the effluent liquid level of each weir trough in the sedimentation tank 004, and can avoid the phenomenon of uneven effluent caused by the impact load of the influent water volume and the unstable undercurrent. By overall adjusting the relative effluent liquid levels of the weir troughs in different regions, the water flow state of the sedimentation tank 004 can also be affected, the water flow energy of the sedimentation tank 004 can be reduced, and the treatment effect can be improved. The liquid level height can be adjusted on the walkway bridge, which is convenient for operation.

[0104] Please refer to Figure 8 , the sewage treatment system according to the embodiments of the present invention includes a coagulation tank 001, a magnetic powder dosing tank 002, a flocculation tank 003, and a sedimentation tank 004 arranged in sequence. Among them, the rectifying grid assembly 200 is installed in the water passage between the flocculation tank 003 and the sedimentation tank 004, and the water collection assembly 100 is installed in the sedimentation tank 004. The rectifying grid assembly 200 and the water collection assembly 100 are used in cooperation. Combining the particularity of a certain project, the most suitable operating hydraulic conditions can be explored, so that the sewage treatment system can accept a higher shock load, the dosage of the medicine is more saved, the stable effluent saves the energy of the operators more, and the advanced treatment effect of the sewage is maximally guaranteed.

[0105] The above embodiments are only used to illustrate the present invention, rather than to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those of ordinary skill in the art should understand that various combinations, modifications, or equivalent replacements of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention, and should all be covered by the scope of the claims of the present invention.

Claims

1. A sewage treatment system, characterized in that, Comprising: A sedimentation tank, the sedimentation tank includes a water collection assembly, and the water collection assembly is installed inside the sedimentation tank; the water collection assembly includes: A weir trough having a first side wall and a second side wall arranged opposite to each other; Weir plates hinged to the side walls of the weir trough, including a first weir plate hinged to the first side wall and a second weir plate hinged to the second side wall; Limit members fixed to the side walls of the weir trough for restricting the weir plates in the vertical position when the weir plates rotate in a set direction, including a first limit member fixed to the first side wall and a second limit member fixed to the second side wall. The first limit member is used to restrict the first weir plate in the vertical position when the first weir plate rotates in the positive direction, and the second limit member is used to restrict the second weir plate in the vertical position when the second weir plate rotates in the positive direction; A flocculation tank provided upstream of the sedimentation tank.

2. The sewage treatment system according to claim 1, wherein The weir plates and the side walls of the weir trough are hinged by a plurality of hinges, and a water stop strip is arranged between the plurality of hinges; The water collection assembly further includes a support member, and the support member is arranged along the length direction of the weir plate on the weir plate.

3. The sewage treatment system according to claim 1, wherein The sedimentation tank further includes: A fixed pulley assembly including a fixed pulley and a cable. The fixed pulley is installed on the side wall of the sedimentation tank, one end of the cable is wound around the fixed pulley, and the other end is connected to the weir plate.

4. The sewage treatment system according to claim 3, wherein The fixed pulley assembly further includes: A first handle fixedly connected to the fixed pulley to drive the fixed pulley to rotate, so that the weir plate rotates relative to the side wall of the weir trough; A first positioning portion fixed to the side wall of the sedimentation tank, and the first positioning portion is formed with a plurality of first positioning holes distributed along the circumference of the fixed pulley; A second positioning portion fixed to the fixed pulley, and a second positioning hole is formed; A positioning bolt for inserting into the second positioning hole and one of the first positioning holes to lock the first positioning portion and the second positioning portion.

5. The sewage treatment system according to claim 1, characterized in that, Further comprising: A rectifying grid assembly installed in the water passage between the flocculation tank and the sedimentation tank, including a plurality of grid bars with adjustable flow guiding directions.

6. The sewage treatment system according to claim 5, characterized in that, The rectifying grid assembly further includes: A mounting frame; A frame hinged to the mounting frame, and the frame is formed with an insertion slot for the grid bars.

7. The sewage treatment system according to claim 6, characterized in that The frame includes: A rectangular frame formed with the insertion slot; Square longitudinal beams fixed to the long sides of the rectangular frame; Round rods fixed to the tops of the square longitudinal beams; A third positioning portion fixed to the round rod, and a third positioning hole is formed; The rectifying grid assembly further includes: A fourth positioning portion fixed to the mounting frame, and a plurality of fourth positioning holes distributed along the rotation direction of the grid bars are formed; A limit bolt for inserting into the third positioning hole and one of the fourth positioning holes to lock the third positioning portion and the fourth positioning portion.

8. The sewage treatment system according to claim 7, characterized in that, The frame further includes: Positioning columns fixed to the bottoms of the square longitudinal beams; The mounting frame is formed with mounting holes for mounting the positioning columns, and the mounting holes and the positioning columns are in clearance fit so that the positioning columns can rotate relative to the mounting holes.

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