CN219603336U - High-efficient sedimentation tank system of sewage treatment - Google Patents
High-efficient sedimentation tank system of sewage treatment Download PDFInfo
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- CN219603336U CN219603336U CN202320210956.9U CN202320210956U CN219603336U CN 219603336 U CN219603336 U CN 219603336U CN 202320210956 U CN202320210956 U CN 202320210956U CN 219603336 U CN219603336 U CN 219603336U
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- sedimentation tank
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- 238000004062 sedimentation Methods 0.000 title claims abstract description 88
- 239000010865 sewage Substances 0.000 title claims abstract description 27
- 238000005189 flocculation Methods 0.000 claims abstract description 158
- 230000016615 flocculation Effects 0.000 claims abstract description 152
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 92
- 238000006243 chemical reaction Methods 0.000 claims abstract description 87
- 238000003756 stirring Methods 0.000 claims abstract description 71
- 239000007788 liquid Substances 0.000 claims abstract description 19
- 238000009792 diffusion process Methods 0.000 claims abstract description 12
- 238000000926 separation method Methods 0.000 claims abstract description 12
- 238000005345 coagulation Methods 0.000 claims description 36
- 230000015271 coagulation Effects 0.000 claims description 35
- 239000000463 material Substances 0.000 claims description 19
- 239000010802 sludge Substances 0.000 claims description 15
- 239000008394 flocculating agent Substances 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 10
- 230000007704 transition Effects 0.000 claims description 9
- 239000002562 thickening agent Substances 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 6
- 239000000701 coagulant Substances 0.000 claims description 5
- 238000007790 scraping Methods 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 238000004065 wastewater treatment Methods 0.000 claims 3
- 238000001556 precipitation Methods 0.000 abstract description 11
- 239000003795 chemical substances by application Substances 0.000 abstract description 2
- 229940037003 alum Drugs 0.000 description 8
- 239000000725 suspension Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 239000003153 chemical reaction reagent Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 229920002401 polyacrylamide Polymers 0.000 description 3
- 238000005352 clarification Methods 0.000 description 2
- 239000000084 colloidal system Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 238000013019 agitation Methods 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- -1 aluminum salt Chemical class 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The utility model provides a sewage treatment efficient sedimentation tank system, which relates to the technical field of sewage treatment, and comprises a flocculation tank and at least one flocculation device; the flocculation device comprises a flocculation reaction guide cylinder, a flocculation stirring device, a flocculation agent diffusion device and a flocculation reaction reverse flow grid; the flocculation reaction reverse flow grid is connected with the lower end of the flocculation reaction guide cylinder, so that liquid is discharged to the outside of the flocculation reaction guide cylinder from the flocculation reaction reverse flow grid, larger granularity and compactness after flocculation forming of flocs are maintained, and subsequent precipitation separation is facilitated; the stirring impeller of the flocculation stirring device is positioned in the flocculation reaction guide cylinder, so that water flow forms a flow state of downward-pressure flow, the flocculation reaction of raw water is facilitated, and physical sedimentation is facilitated, so that the required sedimentation area is smaller; the flocculant diffusion device is arranged in the flocculation reaction guide cylinder and positioned below the stirring impeller and is used for inputting flocculant into the flocculation reaction guide cylinder, and the flocculant can be more uniformly mixed with raw water.
Description
Technical Field
The utility model relates to the technical field of sewage treatment, in particular to a sewage treatment efficient sedimentation tank system.
Background
Precipitation is a common process in water treatment, and the aim of purifying water quality is achieved by separating a large amount of suspended matters (SuspendedSolids, SS) in water through solid-liquid separation. Conventional precipitation techniques include advection precipitation, radial flow precipitation, vertical flow precipitation, and inclined plate/tube precipitation. Different types of sedimentation technologies have the characteristics of the sedimentation technologies, but have the defects of large floor space of a advection sedimentation tank and a radial sedimentation tank, and are more applied in large-scale and medium-scale water treatment plants, but are not suitable for small-scale water treatment plants; the vertical flow sedimentation tank has the advantages that the tank body is generally deeper, the construction difficulty and the construction cost are higher, and the vertical flow sedimentation tank is sensitive to the change of water quality and water quantity; the traditional inclined plate/inclined tube sedimentation tank is suitable for a small-sized water treatment plant, the problem of uneven water distribution is easy to occur under the condition of large tank body volume, and the water quality of the discharged water is not easy to be greatly improved. The traditional sedimentation tank has limited capability of removing pollutants such as chemical oxygen demand (ChemicalOxygenDemand, COD) and SS in sewage; and only has a single sedimentation and clarification function, and a flocculation reaction tank needs to be built in front of the tank, so that the occupied area and the construction cost of the water treatment system are further increased.
Therefore, in order to improve the removal capability of COD and SS in water, a high-density sedimentation tank process integrating flocculation, sedimentation and clarification is developed, the tank type structure of the high-density sedimentation tank is compact, the occupied area of a water treatment system is reduced, and the high-density sedimentation tank can be flexibly applied to primary and advanced treatment of raw water of drinking water, industrial and domestic sewage and rainwater.
The high-density sedimentation tank mainly comprises a rapid mixing tank, a flocculation reaction tank and a sedimentation separation tank, and integrates flocculation and sedimentation processes, as shown in figure 5, inlet water is discharged into the rapid mixing tank from a pipeline, and meanwhile, flocculating agents (such as ferric salt and aluminum salt) are added, and rapid stirring is carried out to realize rapid flocculation and avoid alum blossom sedimentation; the effluent of the rapid mixing tank enters a flocculation reaction tank, and coagulant aids (such as Polyacrylamide (PAM)) are added at the lower part of the reaction tank through a dosing device to generate large alum blossom; while controlling the stirring rate in the reaction tank (where the stirring rate is lower than that of the rapid mixing tank) to prevent the alum floc from being broken up and forming a precipitate in the reaction zone. The wastewater carrying alum blossom enters a precipitation separation tank, and most alum blossom is precipitated and concentrated. The mud scraper at the bottom of the sedimentation separation tank is used for continuously scraping and sweeping so as to promote concentration of sediment mud, part of mud flows back to the flocculation reaction tank through the mud return pipe and is used for keeping the required mud concentration in the flocculation reaction tank, promoting growth of alum blossom in the flocculation process and improving the density of alum blossom, and the residual mud is discharged for further treatment. The inclined plate/inclined tube sedimentation device is arranged at the upper part of the sedimentation separation tank and is used for removing the residual fine alum flowers and finally producing water reaching the standard.
The existing high-density sedimentation tank has the following defects:
(1) the flocculation tank has insufficient mixing circulation quantity, and the required sedimentation area is large: the flocculation stirring device of the traditional high-efficiency sewage treatment system adopts upward lifting liquid to achieve the purpose of flocculation, the design often cannot reach 10 times of the raw water liquid lifting amount required by the design standard in the actual operation process, the mixed flocculation effect is poor, the size and the specific gravity of the formed suspended matters are small, the time required by precipitation is longer, and the construction area of a sedimentation tank is larger;
(2) the consumption of flocculant is large: the flocculant adding point of the traditional high-efficiency sewage treatment system is often directly positioned in a flocculation tank, specific requirements are not met by specific adding points, flocculation reagent mixing is carried out only by virtue of a circulating flow formed in the tank body by a flocculation mixer, a dead zone is easy to form in the mode, and reagent mixing cannot be effectively participated in part of the area, so that excessive reagent investment is caused, and reagent infiltration in all areas can be ensured.
Disclosure of Invention
The utility model aims to provide a sewage treatment efficient sedimentation tank system which is used for solving the technical problems existing in the prior art.
Based on the above purpose, the utility model provides a sewage treatment high-efficiency sedimentation tank system, which comprises a flocculation tank and at least one flocculation device;
the flocculation device comprises a flocculation reaction guide cylinder, a flocculation stirring device, a flocculant diffusion device and a flocculation reaction reverse flow grid;
the flocculation reaction guide cylinder is connected with the inner wall of the flocculation tank through a support frame, the upper end of the flocculation reaction guide cylinder is provided with an inlet for liquid inflow, the lower end of the flocculation reaction guide cylinder is provided with an outlet for liquid outflow, and the flocculation reaction backflow grid is connected with the lower end of the flocculation reaction guide cylinder, so that the liquid is discharged to the outside of the flocculation reaction guide cylinder through the flocculation reaction backflow grid;
the flocculation stirring device comprises a stirring motor, a stirring shaft and a stirring impeller, wherein the stirring motor is arranged above the flocculation tank, the stirring impeller is positioned in the flocculation reaction guide cylinder, and the output end of the stirring motor is connected with the stirring impeller through the stirring shaft;
the flocculating agent diffusion device is arranged in the flocculation reaction guide cylinder and is positioned below the stirring impeller, and is connected with the flocculation reaction guide cylinder through a connecting frame and used for inputting flocculating agent into the flocculation reaction guide cylinder;
a material circulation channel is arranged at the bottom of one side of the flocculation tank.
Further, the flocculation reaction reverse flow grid adopts a circular grid type structure.
Further, a plurality of material circulation channels are arranged at the bottom of one side of the flocculation tank, and rectangular holes are adopted in the material circulation channels.
Further, the upper edge of the blade of the stirring impeller adopts an inclined edge, and the height of the inclined edge in the radial direction from the axis of the stirring impeller is gradually reduced, so that the liquid in the flocculation reaction guide cylinder forms a down-pressure water flow state.
Further, the flocculating agent diffusion device adopts an annular pipeline, one end of the annular pipeline is communicated with the dosing pipeline, and a release hole is arranged on the annular pipeline at intervals of 15 degrees, so that the flocculating agent is uniformly released along the annular pipeline.
Further, two flocculation devices are arranged in the flocculation tank.
Further, the device also comprises a coagulation pool and a coagulation stirring device;
the coagulation tank is positioned at the upstream position of the flocculation tank, and the lower end of one side of the coagulation tank is communicated with the flocculation tank through an overflow channel;
the coagulation stirring device is arranged on the coagulation tank and is used for mixing coagulant in the coagulation tank with raw water.
Further, the device also comprises a sedimentation tank, wherein one side of the sedimentation tank is communicated with a transition channel, the transition channel is also communicated with the material circulation channel, and the transition channel adopts an inverted U-shaped form.
Further, a water collecting device, a central transmission sludge thickener and an inclined tube device are arranged in the sedimentation tank;
the water collecting devices are arranged in a plurality and connected with the upper section of the inner wall of the sedimentation tank, and are used for uniformly collecting clear water after mud-water separation;
the center transmission sludge thickener is assembled in the sedimentation tank and used for concentrating suspended flocs settled in the sedimentation tank, and finally scraping the suspended flocs to a center sludge hopper at the bottom in the sedimentation tank and discharging the suspended flocs through a sludge discharge pump;
the inclined tube device is in a regular hexagon honeycomb shape and is arranged on the inner wall of the sedimentation tank.
Further, a water inlet channel is arranged at the upper end of one side of the coagulation pool, and the water inlet channel is connected with a water inlet pipeline; the upper end of the sedimentation tank is provided with a water outlet channel which is connected with a water outlet pipeline.
By adopting the technical scheme, the sewage treatment efficient sedimentation tank system provided by the utility model has the following technical effects compared with the prior art:
1. the flocculation stirring device can enable water flow to form a flow state of downward-pressing flow, and compared with the stirring mode of lifting materials upwards under the condition of equal power consumption, the flocculation stirring device is more conducive to flocculation reaction of raw water, and micro flocs formed after coagulation are easier to form coarse flocs and are more convenient for physical sedimentation, so that the required sedimentation area is smaller;
2. the flocculant diffusion device is additionally arranged in the flocculation reaction guide cylinder, so that the flocculant can be mixed with raw water more uniformly, no dead zone exists, and the adding amount of the flocculant can be reduced;
3. the flocculation reaction reverse flow grid is arranged below the flocculation reaction guide cylinder, so that the breakage of the floccules caused by horizontal shearing force after the raw water floccules flow out of the flocculation reaction guide cylinder can be reduced, the larger granularity and compactness of the floccules after flocculation forming are maintained, and the subsequent precipitation separation is facilitated.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a sewage treatment efficient sedimentation tank system according to an embodiment of the present utility model;
FIG. 2 is a top view of a sewage treatment high efficiency sedimentation tank system provided by an embodiment of the present utility model;
FIG. 3 is a schematic structural diagram of a flocculant diffusing device according to an embodiment of the present utility model;
FIG. 4 is a schematic structural diagram of a flocculation reaction reverse flow grid provided by an embodiment of the utility model;
fig. 5 is a schematic structural diagram of a high-density sedimentation tank in the prior art.
Icon: 100-flocculation tank; 110-a material flow channel; 200-flocculation device; 210-flocculation reaction guide cylinder; 220-flocculation stirring device; 221-stirring motor; 222-a stirring shaft; 223-stirring impeller; 230-a flocculant diffusion device; 231-dosing line; 240-flocculation reaction reverse flow grid; 300-a coagulation tank; 400-coagulation stirring device; 500-a sedimentation tank; 510-a water collecting device; 520-center drive sludge thickener; 530-a chute arrangement; 600-transition channel; 700-water inlet channel; 710-a water inlet pipe; 800-water outlet channel; 810-water outlet pipeline.
Detailed Description
The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
As shown in fig. 1 to 4, the sewage treatment efficient sedimentation tank system provided by the embodiment of the utility model comprises a flocculation tank 100 and at least one flocculation device 200;
flocculation apparatus 200 includes flocculation reaction draft tube 210, flocculation agitation device 220, flocculation agent diffusion device 230, and flocculation reaction reverse flow grid 240;
the flocculation reaction guide cylinder 210 is arranged in a cylindrical shape and is arranged in the center of the flocculation tank 100, the designed projection area of the flocculation reaction guide cylinder is not less than 75% of the plane area of the flocculation tank, the flocculation reaction guide cylinder 210 is connected with the inner wall of the flocculation tank 100 through a support frame, and the upper end surface of the flocculation reaction guide cylinder 210 is positioned below the liquid level by 0.3m; the upper end of the flocculation reaction guide cylinder 210 is provided with an inlet for inflow of liquid, the lower end of the flocculation reaction guide cylinder 210 is provided with an outlet for outflow of liquid, and the flocculation reaction reverse flow grid 240 is connected with the lower end of the flocculation reaction guide cylinder 210 so that the liquid is discharged to the outside of the flocculation reaction guide cylinder 210 by the flocculation reaction reverse flow grid 240;
the flocculation stirring device 220 comprises a stirring motor 221, a stirring shaft 222 and a stirring impeller 223, wherein the stirring motor 221 is arranged above the flocculation basin 100, the stirring impeller 223 is positioned in the flocculation reaction guide cylinder 210, and the output end of the stirring motor 221 is connected with the stirring impeller 223 through the stirring shaft 222; the stirring motor 221 drives the stirring impeller 223 to rotate in the flocculation reaction guide cylinder 210 through the stirring shaft 222, so that the circulation of the liquid inside and outside the flocculation reaction guide cylinder 210 can be realized.
The flocculating agent diffusing device 230 is arranged in the flocculation reaction guide cylinder 210 and is positioned below the stirring impeller 223, and the flocculating agent diffusing device 230 is connected with the flocculation reaction guide cylinder 210 through a connecting frame and is used for inputting flocculating agent into the flocculation reaction guide cylinder 210; the flocculant can be mixed with raw water more uniformly, no dead zone exists, and the adding amount of the flocculant can be reduced; forming a suspension with larger and denser floc particle size, wherein the suspension can be quickly settled in a water body;
a material flow channel 110 is arranged at the bottom of one side of the flocculation tank 100, and the mixed water body of the flocculation tank 100 flows into the tank body of the subsequent process through the material flow channel 110 for reprocessing.
In a preferred embodiment, as shown in FIG. 3, the flocculation reaction reverse flow grid 240 adopts a circular grid structure, and the design space of the grid is 200mm; the flocculation reaction reverse flow grid 240 can be connected with the bottom of the flocculation reaction draft tube 210 through bolts, so that the flocculation reaction reverse flow grid 240 can be conveniently detached, replaced and maintained.
In a preferred embodiment, a plurality of material flow channels 110 are arranged at the bottom of one side of the flocculation tank 100, and rectangular holes are adopted in the material flow channels 110.
In a preferred embodiment, the upper edges of the blades of the impeller 223 are inclined, and the height of the inclined edges from the axis of the impeller 223 to the radial direction is gradually reduced, so that the liquid in the flocculation reaction guide cylinder 210 forms a down-pressure water flow state, and the water flow can fully circulate in the flocculation tank 100 and the flocculation reaction guide cylinder 210. Specifically, the blades of the stirring impeller 223 are designed to be 45-degree folded blades, the number of the blades is 3 blades, the ratio of the blade length to the diameter of the guide cylinder is 0.75, the ratio of the blade width to the blade length is 0.2, the rotating speed is 15-30 revolutions per minute, and the blade distance is 0.3m from the bottom of the guide cylinder.
In a preferred embodiment, as shown in fig. 4, the flocculant dispersing device 230 employs an annular pipe, one end of which is communicated with the dosing pipe 231, and a discharge hole is arranged on the annular pipe at an interval of 15 ° so that the flocculant is uniformly discharged along the annular pipe.
In a preferred embodiment, two flocculation devices 200 are configured in the flocculation tank 100, namely, a double-unit form is adopted, the flow state of downward flow is adopted, and under the condition of equal power consumption, compared with the stirring form of upward lifting materials in the prior art, the circulation amount is larger, the flocculation reaction of raw water is facilitated, the micro-flocs formed after coagulation are easier to form coarse flocs, and the physical sedimentation is more convenient, so that the required sedimentation area is smaller.
The sewage treatment efficient sedimentation tank system provided by the embodiment further comprises a coagulation tank 300 and a coagulation stirring device 400;
the coagulation tank 300 is located at an upstream position of the flocculation tank 100, and a lower end of the coagulation tank 300 is communicated with the flocculation tank 100 through an overflow channel;
the coagulation stirring device 400 is arranged on the coagulation tank 300 and is used for mixing coagulant in the coagulation tank 300 with raw water, the coagulation stirring device 400 comprises a flocculation motor, a shaft and coagulation stirring blades, and the flocculation motor and the shaft drive the coagulation stirring blades to rotate so as to sufficiently stir liquid in the coagulation tank 300.
Specifically, the coagulation stirring vane is designed to be 45-degree folded paddles, the number of the vanes is 3, the ratio of the length of the vanes to the width of the tank body is controlled between 0.5 and 0.75, the ratio of the width of the vanes to the length of the vanes is 0.1, the rotating speed is 60 revolutions per minute, and the distance between the vanes and the bottom of the tank is 0.5m; through the coagulation reaction in the process, the colloid particles are destabilized at this stage to form a fine suspension state.
The high-efficient sedimentation tank system of sewage treatment that this embodiment provided still includes sedimentation tank 500, and one side intercommunication of sedimentation tank 500 has transition passageway 600, and transition passageway 600 still communicates with material circulation passageway 110, and transition passageway 600 adopts the form of falling U, and the final undercurrent of raw water is to the bottom of sedimentation tank 500.
A water collecting device 510, a central transmission sludge thickener 520 and a pipe chute device 530 are arranged in the sedimentation tank 500;
the water collecting devices 510 are arranged in plurality and are connected with the upper section of the inner wall of the sedimentation tank 500, and are used for uniformly collecting clear water after mud-water separation; the water collecting device 510 adopts a rectangular water collecting tank design form, and the tank width is 300mm and the height is 350mm.
The center-driven sludge thickener 520 is assembled in the sedimentation tank 500 and is used for concentrating suspended flocs settled in the sedimentation tank 500, and finally scraping the suspended flocs to a center sludge hopper at the bottom in the sedimentation tank 500 and discharging the suspended flocs through a sludge discharge pump;
the chute apparatus 530 is in the shape of a regular hexagonal honeycomb, which is installed on the inner wall of the settling tank 500.
In addition, a water inlet channel 700 is provided at an upper end of one side of the coagulation basin 300, and the water inlet channel 700 is connected with a water inlet pipe 710; the upper end of the sedimentation tank 500 is provided with a water outlet channel 800, and the water outlet channel 800 is connected with a water outlet pipeline 810.
The following describes the working principle of the sewage treatment efficient sedimentation tank system in this embodiment:
raw water firstly passes through a coagulation tank 300, coagulant such as aluminum salt, ferric salt and the like is added in the area, and colloid particles are destabilized at the stage to form a fine suspension state;
raw water passes through a flocculation tank 100, and a polyacrylamide polymer flocculant is thrown into the flocculation tank, so that fine suspended matters formed in the stage are bridged to form a suspension with larger and denser floc particle size, and the suspension can be quickly settled in a water body;
the raw water finally passes through a sedimentation area, the suspension formed in the stage is subjected to mud-water separation in the stage, the suspension with relatively large specific gravity is settled to the bottom of the sedimentation tank 500, the material is concentrated through a central transmission sludge thickener 520, and then the material is discharged out of the system through a sludge discharge pump; meanwhile, the residual micro flocs and the effluent water pass through the inclined tube device 530, the micro flocs are settled again, the residual raw water reversely flows into the water collecting device 510 again, the water collecting device 510 adopts a plurality of groups of rectangular water collecting grooves to be uniformly arranged on the upper part of the sedimentation tank, uniform effluent water in the sedimentation area is ensured, the water collecting device 510 gathers the treated water to the water outlet channel 800, the water is discharged out of the system, and finally clear collection of the effluent water is ensured.
The sewage treatment efficient sedimentation tank system provided by the utility model has at least the following advantages:
1. the flocculation stirring device 220 can enable water flow to form a flow state of downward flow, and compared with the stirring mode of lifting materials upwards under the condition of equal power consumption, the flocculation stirring device is more conducive to flocculation reaction of raw water, and micro flocs formed after coagulation are easier to form coarse flocs and are more convenient for physical sedimentation, so that the required sedimentation area is smaller;
2. the flocculant diffusion device 230 is additionally arranged in the flocculation reaction guide cylinder 210, so that the flocculant can be mixed with raw water more uniformly, no dead zone exists, and the adding amount of the flocculant can be reduced;
3. the flocculation reaction reverse flow grid 240 is arranged below the flocculation reaction guide cylinder 210, so that the breakage of the floccules caused by horizontal shearing force after the raw water floccules flow out of the flocculation reaction guide cylinder 210 can be reduced, the larger granularity and compactness of the floccules after flocculation forming are maintained, and the subsequent precipitation separation is facilitated.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.
Claims (10)
1. The sewage treatment efficient sedimentation tank system is characterized by comprising a flocculation tank and at least one flocculation device;
the flocculation device comprises a flocculation reaction guide cylinder, a flocculation stirring device, a flocculant diffusion device and a flocculation reaction reverse flow grid;
the flocculation reaction guide cylinder is connected with the inner wall of the flocculation tank through a support frame, the upper end of the flocculation reaction guide cylinder is provided with an inlet for liquid inflow, the lower end of the flocculation reaction guide cylinder is provided with an outlet for liquid outflow, and the flocculation reaction backflow grid is connected with the lower end of the flocculation reaction guide cylinder, so that the liquid is discharged to the outside of the flocculation reaction guide cylinder through the flocculation reaction backflow grid;
the flocculation stirring device comprises a stirring motor, a stirring shaft and a stirring impeller, wherein the stirring motor is arranged above the flocculation tank, the stirring impeller is positioned in the flocculation reaction guide cylinder, and the output end of the stirring motor is connected with the stirring impeller through the stirring shaft;
the flocculating agent diffusion device is arranged in the flocculation reaction guide cylinder and is positioned below the stirring impeller, and is connected with the flocculation reaction guide cylinder through a connecting frame and used for inputting flocculating agent into the flocculation reaction guide cylinder;
a material circulation channel is arranged at the bottom of one side of the flocculation tank.
2. The wastewater treatment efficient sedimentation tank system of claim 1, wherein the flocculation reaction reverse flow grid adopts a circular grid structure.
3. The efficient sedimentation tank system for sewage treatment according to claim 1, wherein a plurality of material circulation channels are arranged at the bottom of one side of the flocculation tank, and rectangular holes are adopted in the material circulation channels.
4. The efficient sedimentation tank system for sewage treatment according to claim 1, wherein the upper edge of the blade of the stirring impeller adopts an inclined edge, and the height of the inclined edge in the radial direction from the axis of the stirring impeller is gradually reduced, so that the liquid in the flocculation reaction guide cylinder forms a down-pressure type water flow state.
5. The efficient sedimentation tank system for sewage treatment according to claim 1, wherein the flocculating agent diffusion device adopts an annular pipeline, one end of the annular pipeline is communicated with the dosing pipeline, and a release hole is arranged on the annular pipeline at intervals of 15 degrees, so that the flocculating agent is uniformly released along the annular pipeline.
6. The efficient sedimentation tank system for sewage treatment according to claim 1, wherein two flocculation devices are arranged in the flocculation tank.
7. The wastewater treatment high efficiency sedimentation tank system of claim 1, further comprising a coagulation tank and a coagulation stirring device;
the coagulation tank is positioned at the upstream position of the flocculation tank, and the lower end of one side of the coagulation tank is communicated with the flocculation tank through an overflow channel;
the coagulation stirring device is arranged on the coagulation tank and is used for mixing coagulant in the coagulation tank with raw water.
8. The efficient wastewater treatment sedimentation tank system of claim 7, further comprising a sedimentation tank, wherein one side of the sedimentation tank is communicated with a transition channel, the transition channel is further communicated with the material flow channel, and the transition channel is in an inverted U-shaped form.
9. The efficient sewage treatment sedimentation tank system of claim 8, wherein a water collecting device, a central transmission sludge thickener and a pipe chute device are arranged in the sedimentation tank;
the water collecting devices are arranged in a plurality and connected with the upper section of the inner wall of the sedimentation tank, and are used for uniformly collecting clear water after mud-water separation;
the center transmission sludge thickener is assembled in the sedimentation tank and used for concentrating suspended flocs settled in the sedimentation tank, and finally scraping the suspended flocs to a center sludge hopper at the bottom in the sedimentation tank and discharging the suspended flocs through a sludge discharge pump;
the inclined tube device is in a regular hexagon honeycomb shape and is arranged on the inner wall of the sedimentation tank.
10. The efficient sedimentation tank system for sewage treatment according to claim 8, wherein a water inlet channel is arranged at the upper end of one side of the coagulation tank, and the water inlet channel is connected with a water inlet pipeline; the upper end of the sedimentation tank is provided with a water outlet channel which is connected with a water outlet pipeline.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202320210956.9U CN219603336U (en) | 2023-02-14 | 2023-02-14 | High-efficient sedimentation tank system of sewage treatment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202320210956.9U CN219603336U (en) | 2023-02-14 | 2023-02-14 | High-efficient sedimentation tank system of sewage treatment |
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