Unpowered flocculation stirrer and flocculation reaction tank

Abstract

The utility model relates to an unpowered flocculation stirrer. The unpowered flocculation stirrer comprises a straight tube and a stirring paddle arranged in the straight tube, the stirring paddle comprises a wheel shaft and a plurality of impellers mounted on the wheel shaft, and the impellers are mounted at intervals in the height direction of the wheel shaft; each impeller comprises a plurality of fan blades, an included angle is formed between the plane where the fan faces of the fan blades are located and the horizontal plane, and the included angle ranges from 25 degrees to 35 degrees. The diameter of the impeller is 0.70-0.95 times that of the straight tube; a water inlet is formed in the bottom of the straight tube, and a water outlet is formed in the top of the straight tube. The water flow disturbance device is mainly applied to a flocculation reaction tank, solves the problems of poor flocculation effect and large occupied area of the reaction tank, and has the advantages of good water flow disturbance effect, small occupied area and simplicity in installation.

Description

Technical Field

[0001] The utility model relates to the technical field of water treatment, in particular to a non-powered flocculation stirrer and a flocculation reaction tank. Background Art

[0002] In the field of water treatment processes, flocculation sedimentation is crucial. Flocculation sedimentation is the process in which particulate matter undergoes flocculation sedimentation in water. After adding a coagulant to water, the colloids and dispersed particles of the suspended matter therein generate flocs under the interaction of molecular forces, and they collide and agglomerate with each other during the sedimentation process. Their size and mass continuously increase, and the sedimentation velocity continuously increases. For example, after adding a coagulant to surface water, floccules will be formed. When adding an aqueous solution prepared from an inorganic flocculant and an organic anion to domestic sewage, the suspended particles in the wastewater lose stability, and flocculation sedimentation occurs during the sedimentation process of the organic suspended matter and activated sludge in the water. The colloidal particles agglomerate with each other to increase the particles and finally form flocs. After the flocs grow to a certain volume, they precipitate out of the water phase under the action of gravity, thereby removing a large amount of suspended matter in the wastewater and achieving the effect of water treatment.

[0003] One of the important factors affecting the flocculation reaction is the stirring intensity of water. If the stirring intensity is too low, it will lead to uneven mixing. If the stirring intensity is too high, the formed flocs will be broken up, affecting the effect. At the same time, most of the current stirrers use electric stirring, which not only consumes a large amount of electricity and has a high operation and maintenance cost, but also easily shows obvious laminar flow and cannot play a good stirring role. Therefore, it is very necessary to carry out technical improvement on the existing flocculation stirring device. Summary of the Utility Model

[0004] (1) Technical Problems to be Solved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the utility model provides a non-powered flocculation stirrer and a flocculation reaction tank, which solve the technical problems that the stirring intensity of the flocculation reaction stirrer is difficult to regulate, and the electric stirring has high energy consumption and is prone to laminar flow phenomenon.

[0006] (2) Technical Solutions

[0007] In a first aspect, the utility model provides a non-powered flocculation stirrer, which includes a straight tube and a stirring paddle arranged in the straight tube; the stirring paddle includes a wheel shaft and a plurality of impellers installed on the wheel shaft, and the impellers are installed at intervals in the height direction of the wheel shaft; each impeller respectively includes a plurality of fan blades, and an included angle is formed between the plane where the fan surface of the fan blade is located and the horizontal plane, and this included angle is 25 - 35 degrees; the diameter of the impeller is 0.70 - 0.95 times the diameter of the straight tube; a water inlet is arranged at the bottom of the straight tube, and a water outlet is arranged at the top of the straight tube.

[0008] According to a preferred embodiment of the present utility model, the impeller installed at the lowermost position of the axle is higher than the installation position of the water inlet.

[0009] According to a preferred embodiment of the present utility model, the top of the straight tube is a hollowed-out bracket, and the hollowed-out part of the hollowed-out bracket forms the water outlet; a first axle mounting hole is provided in the middle of the hollowed-out bracket; a second axle mounting hole is provided at the bottom of the straight tube; both ends of the axle are installed in the first axle mounting hole and the second axle mounting hole.

[0010] According to a preferred embodiment of the present utility model, bearings are respectively provided in the first axle mounting hole and the second axle mounting hole, so that the axle can rotate freely relative to the first axle mounting hole and the second axle mounting hole.

[0011] According to a preferred embodiment of the present utility model, the top of the straight tube is open, a wheel axle mounting seat is provided at the bottom of the straight tube, the lower end of the wheel axle is installed in the wheel axle mounting seat, and a bearing is provided in the wheel axle mounting seat, so that the wheel axle can rotate freely relative to the wheel axle mounting seat.

[0012] According to a preferred embodiment of the present utility model, an assembly hole is provided in the middle of the impeller, a bearing is provided in the assembly hole, the impeller is installed on the axle by means of the assembly hole and the bearing provided inside, and an impeller limiting member is provided on the axle to prevent the impeller from sliding up and down and allow the impeller to rotate freely relative to the axle.

[0013] According to a preferred embodiment of the present utility model, the impeller is further provided with an outer ring connecting ring, and the outer ring connecting ring connects the outer ends of the respective fan blades of the impeller together; the impeller is a product integrally formed of plastic material. The outer ring connecting ring is used to strengthen the structure of the impeller, improve its structural durability, effectively prevent the deformation of the fan blades, such as the change of the inclination angle of the fan surface, and reduce the problem of partial fan blade defect.

[0014] In a second aspect, the present utility model further provides a flocculation reaction tank, which includes a power-free flocculation stirrer having the above structure.

[0015] According to a preferred embodiment of the present utility model, the flocculation reaction tank includes a plurality of reaction tank units, the bottoms of the reaction tank units are connected in sequence according to the water flow direction, and at least one of the power-free flocculation stirrers is provided in each of the reaction tank units.

[0016] According to a preferred embodiment of the present utility model, a partition plate is further provided in the reaction tank unit to divide the reaction tank unit into a plurality of compartments, and one of the power-free flocculation stirrers is provided in each compartment; the partition plate is used to make the volume of the compartment 1.5 - 5 times the volume of the straight tube.

[0017] According to a preferred embodiment of the present utility model, a communicating pipe is provided at the bottom of the partition plate. One end of the communicating pipe communicates with the internal space of one of the adjacent two compartments, and the other end communicates with the water inlet of the straight tube placed in the other compartment, whereby the flow mode of the water is always from the bottom of the straight tube into the straight tube and overflows from the top of the straight tube.

[0018] (III) Beneficial effects

[0019] The non-powered flocculation stirrer of the present utility model is mainly applied to a flocculation reaction tank, solves the problems of poor flocculation effect and large floor area of the reaction tank, and has the advantages of good disturbance effect on water flow, small floor area and simple installation.

[0020] The non-powered flocculation stirrer of the present utility model does not require power to maintain, has low energy consumption and low maintenance cost. The water flow enters from the bottom and overflows from the top after being disturbed. The disturbance effect is good, the stirring intensity is moderate, and the laminar flow problem will not occur.

[0021] For the non-powered flocculation stirrer of the present utility model, an angle of 25-35 degrees is formed between the plane where the fan surface of the fan blade is located and the horizontal plane, so that during the rising process of the water flow from the straight tube, the water flow lift force can act on the fan surface to push the impeller or the entire stirring paddle to rotate, thus realizing the non-powered rotation of the stirring paddle. The diameter of the impeller is 0.70-0.95 times the diameter of the straight tube, so that the impeller can basically cover most of the cross-sectional area of the straight tube, reduce the area not covered by the impeller, and improve the flocculation disturbance effect.

[0022] The diameter and height of the straight tube of the non-powered flocculation stirrer of the present utility model are designed according to the water flow speed and water volume, and specific parameters are designed in the way of "one quantity, one strategy". Description of the drawings

[0023] Figure 1 It is a schematic diagram of the non-powered flocculation stirrer of the present utility model.

[0024] Figure 2 It is a schematic diagram of the stirring paddle of the present utility model.

[0025] Figure 3 It is a top view structural schematic diagram of the flocculation reaction tank of the present utility model.

[0026] Figure 4 It is a side view schematic diagram of the flocculation reaction tank of the present utility model. Detailed implementation manners

[0027] In order to better explain the present utility model for easy understanding, the present utility model will be described in detail below with reference to the drawings through specific implementation manners.

[0028] As Figure 1-2As shown in the figure, the present utility model provides a power-free flocculation stirrer 1, which includes a straight tube 10 and a stirring paddle 20 disposed inside the straight tube. The stirring paddle 20 includes a wheel shaft 21 and a plurality of impellers 22 mounted on the wheel shaft 21. Among them, there are a plurality of impellers 22, which are installed at intervals in the height direction of the wheel shaft 21. Each impeller 22 includes a plurality of fan blades 221, and an angle is formed between the plane where the fan surfaces of these fan blades 221 are located and the horizontal plane. This angle is 25 - 35 degrees, preferably 30 degrees, so that the projection of the fan surface of the fan blade 221 in the horizontal direction is greater than 0. Thus, it can be affected by the above-mentioned impact force of the water flow and generate a component that pushes the fan blade 221 or the stirring paddle 20 to rotate. The bottom of the straight tube 10 is provided with a water inlet 11, and the top of the straight tube 10 is provided with a water outlet 12. Among them, the diameter of the impeller 22 is 0.70 - 0.95 times the diameter of the straight tube 10; so that the impeller 22 can basically cover most of the cross-section of the straight tube 10, reduce the area not covered by the impeller 22, and improve the flocculation disturbance effect. As Figure 1 shown, the impeller 22 installed at the lowermost position of the wheel shaft 21 is higher than the installation position of the water inlet 11, so that the water flow can immediately act on the impeller 22 installed at the lowermost position of the wheel shaft 21 after entering the straight tube 10.

[0029] Among them, as Figure 2 shown, the top of the straight tube 10 can be set as a hollowed-out bracket, the hollowed-out part of the hollowed-out bracket forms the water outlet 12, and a first wheel shaft mounting hole 13 is provided in the middle of the hollowed-out bracket. A second wheel shaft mounting hole (not shown) is provided at the bottom of the straight tube 10, and both ends of the wheel shaft 21 are installed in the first wheel shaft mounting hole 13 and the second wheel shaft mounting hole. Preferably, bearings are respectively provided in the first wheel shaft mounting hole 13 and the second wheel shaft mounting hole, so that the wheel shaft 21 can rotate freely relative to the first wheel shaft mounting hole 13 and the second wheel shaft mounting hole. At this time, the impeller 22 mounted on the wheel shaft 21 is fixedly assembled, that is, the impeller 22 is installed without rotation. Of course, the impeller 22 can also be rotatably installed on the wheel shaft 21. Preferably, some of the impellers 22 are fixedly installed relative to the wheel shaft 21, while some are rotatably installed relative to the wheel shaft 21.

[0030] In other embodiments, the top of the straight tube 10 is not provided with a hollowed-out bracket, but is a completely open structure. At this time, the wheel shaft 21 can only be fixed inside the straight tube 10 through its lower end. Specifically, a wheel shaft mounting seat can be provided at the inner bottom of the straight tube 10, and the lower end of the wheel shaft 21 is installed in the wheel shaft mounting seat. Similarly, a bearing is provided in the wheel shaft mounting seat, so that the wheel shaft 21 can freely rotate inside the straight tube 10 only by being assembled at the lower end in the wheel shaft mounting seat.

[0031] As a further variation of the above structure, the axle 21 can be fixedly mounted on the straight tube 10, that is, the axle 21 cannot rotate freely in the straight tube 10. In this case, the impeller 22 must be rotatably mounted on the axle 21. For example, an assembly hole is provided in the middle of the impeller 22, a bearing is provided in the assembly hole, and the impeller 22 is mounted on the axle 21 with the aid of the assembly hole and the bearing provided inside. At the same time, an impeller stopper is provided on the axle 21 to prevent the impeller 22 from sliding up and down and to allow the impeller 22 to rotate freely relative to the axle 21.

[0032] like Figure 2 As shown, the impeller 22 is also provided with an outer ring connecting ring 222, which connects the outer ends of the blades 221 of the impeller 22 together; the impeller 22 is a plastic integrally formed product. The outer ring connecting ring 222 is used to strengthen the impeller structure and improve its structural durability, which can effectively prevent the blades 221 from deforming, such as changing the inclination angle of the fan surface of the blade, and reduce the problem of partial blade 221 being damaged.

[0033] like Figure 3-4 As shown, the utility model also provides a flocculation reaction tank, in which the unpowered flocculation agitator of the above structure is installed. Figure 3 As shown, the flocculation reaction tank includes a plurality of reaction tank units 100, and the bottoms of the reaction tank units 100 are sequentially connected according to the water flow direction, so that the hydraulic force can pass through each reaction tank unit 100 in sequence, thereby improving the effect of the flocculation reaction. At least one unpowered flocculation agitator 1 is provided in each reaction tank unit 100.

[0034] Preferably, if Figure 3 As shown, a partition plate 102 is further provided in the reaction tank unit 100, preferably a partition plate made of PVC material, by which the reaction tank unit 100 is divided into a plurality of compartments 101, and a non-powered flocculation agitator 1 is provided in each compartment 101; the partition plate 102 can be used to reduce the volume of the compartment, which is approximately 1.5-5 times the volume of the straight tube 10, thereby enhancing the disturbance effect of the water flow.

[0035] Combination Figure 3 - Figure 4As shown in the figure, a communicating pipe 1021 is provided at the bottom of the partition plate 102. One end of the communicating pipe 1021 communicates with the internal space of one of the adjacent two compartments, i.e., compartment 101, and the other end 1021 communicates with the water inlet 11 of the straight tube 10 placed in the other compartment. In this way, the flow mode of the water flow is always from the water inlet 11 at the bottom of the straight tube 10 and overflows from the top of the straight tube 10. The overflowing water flow enters the compartment 101, then sinks and enters the straight tube 10 placed in another adjacent compartment 101 through the communicating pipe 1021 at the bottom of the partition plate 102. The water flow rises from bottom to top, causing the unpowered flocculation stirrer 1 to rotate and generate a disturbing effect. A connecting pipe is also provided at the water inlet of the flocculation reaction tank, so that the inlet water is directly introduced into the straight tube 10 of the unpowered flocculation stirrer 1 adjacent to the water inlet end of the flocculation reaction tank.

[0036] The unpowered flocculation stirrer 1 of the present utility model is mainly applied to the flocculation reaction tank, solving the problems of poor flocculation effect and large floor area of the reaction tank, and having the advantages of good disturbing effect on water flow, small floor area and simple installation; the unpowered flocculation stirrer 1 does not require power to maintain, has low energy consumption and low maintenance cost. The water flow enters from the bottom, overflows from the top after being disturbed, has a good disturbing effect, a moderate stirring intensity, and will not have a laminar flow problem.

[0037] For the unpowered flocculation stirrer 1 of the present utility model, an angle of 25 - 35 degrees is formed between the plane where the fan surface of the fan blade 221 is located and the horizontal plane, so that the hydraulic force acts on the fan surface during the process of the water flow rising from the straight tube 10, generating a lateral thrust component to push the impeller 22 or the whole stirring paddle 20 to rotate, thus realizing unpowered rotation. For the unpowered flocculation stirrer 1 of the present utility model, the axle 21 of the stirring paddle 20 can be either fixedly installed or rotatably installed with bearings. When the axle 21 is fixedly installed, several impellers 22 provided on the axle 21 must be rotatably installed on the axle; when both ends of the axle 21 are rotatably installed (supported by bearings), several impellers 22 provided on the axle 21 can be either rotatably installed or fixedly installed, or preferably, some impellers 22 are rotatably installed while the rest of the impellers 22 are fixedly installed, which can greatly enhance the disturbing effect and maneuverability to adapt to different water inflows and water flow velocities.

[0038] The diameter and height of the straight tube of the unpowered flocculation stirrer of the present utility model are designed according to the water flow velocity and water volume, and specific parameters are designed in the way of "one measure for one situation".

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A non-powered flocculation agitator, characterized in that: It includes: A straight tube and a stirring paddle arranged in the straight tube; the stirring paddle comprises a wheel shaft and a plurality of impellers mounted on the wheel shaft, the impellers are installed at intervals in the height direction of the wheel shaft; each of the impellers comprises a plurality of blades, An angle is formed between the plane where the fan surface of the fan blade is located and the horizontal plane, and the angle is 25-35 degrees; the diameter of the impeller is 0.70-0.95 times the diameter of the straight tube; a water inlet is provided at the bottom of the straight tube, and a water outlet is provided at the top of the straight tube.

2. The unpowered flocculation agitator according to claim 1, characterized in that: The impeller installed at the lowest position of the wheel shaft is higher than the setting position of the water inlet.

3. The unpowered flocculation agitator according to claim 1, characterized in that: The top of the straight tube is a hollow bracket, and the hollow part of the hollow bracket forms the water outlet; a first axle mounting hole is provided in the middle of the hollow bracket; a second axle mounting hole is provided at the bottom of the straight tube; both ends of the axle are installed in the first axle mounting hole and the second axle mounting hole.

4. The unpowered flocculation agitator according to claim 3, characterized in that: Bearings are respectively disposed in the first axle mounting hole and the second axle mounting hole, so that the axle can rotate freely relative to the first axle mounting hole and the second axle mounting hole.

5. The unpowered flocculation agitator according to claim 1, characterized in that: The top of the straight tube is open, and a wheel axle mounting seat is provided at the bottom of the straight tube. The lower end of the wheel axle is installed in the wheel axle mounting seat, and a bearing is provided in the wheel axle mounting seat so that the wheel axle can rotate freely relative to the wheel axle mounting seat.

6. The unpowered flocculation agitator according to claim 1, characterized in that: An assembly hole is provided in the middle of the impeller, a bearing is provided in the assembly hole, the impeller is installed on the wheel shaft with the help of the assembly hole and the bearing arranged inside, and an impeller limiter is provided on the wheel shaft to prevent the impeller from sliding up and down and allow the impeller to rotate freely relative to the wheel shaft.

7. The unpowered flocculation agitator according to claim 1, characterized in that: The impeller is also provided with an outer ring connecting ring, and the outer ends of the blades of the impeller are connected together; the impeller is a product integrally formed of plastic material.

8. A flocculation reaction tank, characterized in that: The invention comprises the unpowered flocculation agitator as described in any one of claims 1 to 7.

9. The flocculation reaction tank according to claim 8, characterized in that: The flocculation reaction tank comprises a plurality of reaction tank units, the bottoms of the reaction tank units are connected in sequence according to the direction of water flow, and at least one unpowered flocculation agitator is arranged in each of the reaction tank units.

10. The flocculation reaction tank according to claim 9, characterized in that: The reaction tank unit is also provided with a partition plate to divide the reaction tank unit into multiple compartments, and each compartment is provided with a non-powered flocculation agitator; the partition plate is used to make the volume of the compartment 1.5-5 times the volume of the straight tube; a connecting pipe is provided at the bottom of the partition plate, one end of the connecting pipe is connected to the internal space of one of the two adjacent compartments, and the other end is connected to the water inlet of the straight tube placed in the other compartment.

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