Multi-stage stirring flocculation reaction device and turbid circulating water purification equipment

Abstract

The present application relates to the technical field of turbid circulating water purification, and discloses a multi-stage stirring flocculation reaction device and a turbid circulating water purification equipment. The multi-stage stirring flocculation reaction device comprises a reaction bin, the main body of which is in a cylindrical structure, the upper end of which is provided with a water outlet, and the lower end of which is in a closed shape, and the bottom sidewall of which is provided with a water inlet pipe; a stirring shaft, which is rotationally arranged in the reaction bin, the axis of which coincides with the axis of the reaction bin, and a water wheel, which is fixedly arranged on the stirring shaft and opposite to the water inlet pipe, is used to drive the water wheel to rotate by means of water flow; and multi-stage stirring paddles, which are sequentially arranged on the stirring shaft, and the transverse width of the multi-stage stirring paddles decreases from bottom to top. The multi-stage stirring flocculation reaction device can utilize the power of sewage to drive the stirring paddles to rotate, so as to form a flocculation environment with decreasing stirring intensity in the reaction bin. The turbid circulating water purification equipment adopts the above multi-stage stirring flocculation reaction device, and has the characteristics of low energy consumption and good purification effect.

Description

Technical Field

[0001] This invention relates to the field of turbid circulating water purification technology, specifically to a multi-stage stirring flocculation reaction device and turbid circulating water purification equipment. Background Technology

[0002] In the iron and steel metallurgical industry, the treatment of turbid circulating water mainly relies on physicochemical methods, including physical and chemical treatment steps such as coagulation, flocculation, clarification, and sedimentation. Traditional processes typically separate the coagulation, flocculation, clarification, and sedimentation processes into different equipment or structures. During the coagulation reaction stage, mechanical stirring devices are usually required to ensure the reaction effect, but this increases energy consumption. To improve flocculation and clarification effects, internal sludge recirculation or external loading body recirculation is often used, but both require additional sludge recirculation equipment, further increasing energy consumption.

[0003] Existing patents, such as CN202421883978.2, disclose the internal structure of a vertical water purification device; CN201820993898.0 discloses a pressurized purification device. The flocculation reaction zone of these devices mainly relies on a micro-vortex reactor, which is a hydraulic static mixing method. This method suffers from problems such as short mixing time, low mixing intensity, and insufficient contact between the flocculant and the flocs in the water, resulting in the polymeric flocculant failing to fully act and form large-sized flocs. Some flocs may undergo post-flocculation and accumulate inside or above the inclined tube packing, causing packing blockage. Furthermore, the settling of flocs and the sliding of sludge within the packing are easily interfered with by the upward flow: on the one hand, it hinders the rapid sliding of settled sludge into the sludge hopper; on the other hand, small flocs may be carried to the effluent area by the upward flow during settling, reducing suspended solids removal efficiency and affecting effluent quality.

[0004] In patent CN202421883978.2, both the flocculation reactor and the sedimentation zone have sludge discharge ports, posing two potential clogging points. The sludge return uses a Venturi tube, resulting in excessive local resistance loss and impacting the efficiency of primary lift energy utilization. In patent CN201820993898.0, the flocculation reactor lacks a sludge discharge port, leading to weak kinetic energy in the flocculation reaction zone and a tendency for sedimentation, thus posing a risk of sludge accumulation. The sludge return uses a double Venturi tube, resulting in excessive local resistance loss and impacting the efficiency of primary lift energy utilization. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a multi-stage stirring flocculation reaction device that utilizes the power of wastewater to drive the stirring paddle to rotate, creating a flocculation environment with decreasing stirring intensity within the reaction chamber.

[0006] On the other hand, the present invention also provides a turbid circulating water purification device, which has the characteristics of low energy consumption and good purification effect.

[0007] According to one embodiment of the present invention, a multi-stage stirred flocculation reaction device is provided, comprising: a reaction chamber, the main body of which is a cylindrical structure, with a water outlet at the upper end and a sealed lower end, and a water inlet pipe on the bottom side wall; a stirring shaft, rotatably disposed in the reaction chamber, with its axis coinciding with the axis of the reaction chamber, and a water wheel fixedly disposed on it opposite to the water inlet pipe for driving the water wheel to rotate by means of water flow; and multiple stirring paddles, sequentially disposed on the stirring shaft, the lateral width of the multiple stirring paddles decreasing from bottom to top.

[0008] As one embodiment, the multi-stage stirring flocculation reaction device further includes: two or more bearing supports fixed to the inner wall of the reaction chamber; wherein, the two ends of the stirring shaft are respectively rotatably connected to the center of the bearing supports via bearings.

[0009] As one embodiment, a sludge lifting blade is fixedly provided at the lower end of the stirring shaft, and a sludge guide tube is provided in the lower part of the reaction chamber, which is sleeved on the outer periphery of the sludge lifting blade, wherein the sludge lifting blade can lift the sludge in the lower part to the upper part when it rotates with the stirring shaft.

[0010] According to one embodiment of the present invention, a turbid circulating water purification device is provided, comprising: a multi-stage stirring flocculation reaction device as described above; a shell, fitted around the outer periphery of the reaction chamber, with a sludge hopper formed at the lower end and a water outlet pipe provided at the upper end, wherein the reaction chamber is fixed inside the shell; and a sludge discharge pipe, one end of which passes through the shell and extends to the sludge hopper.

[0011] As one embodiment, the turbid water purification equipment further includes: a mesh water distributor, which is a cylindrical structure with an inlet connected to the outlet at one end and a sealed end at the other end, and a plurality of outlet holes on its side wall; a radial flow packing, including a plurality of vertical plates and a plurality of finned plates, wherein the plurality of vertical plates are fixed in a ring on the outer side wall of the mesh water distributor, and water flow channels are formed between adjacent vertical plates, and a plurality of horizontally or nearly horizontally arranged finned plates are arranged in each water flow channel, wherein a first side of the finned plate is fixedly connected to the vertical plate, and the side opposite to the first side is a downwardly inclined free end, and a sludge flow channel is formed between the free end and the adjacent vertical plate; wherein, an annular seam water collection area is formed between the radial flow packing and the inner wall of the shell.

[0012] In one embodiment, the width of the finned plate increases from the end closer to the mesh water distributor to the end farther away from the mesh water distributor.

[0013] In one embodiment, the finned plate is an elastic structural component.

[0014] In one embodiment, several vertical plates are evenly arranged around the outer periphery of the mesh water distributor; in each water flow channel, several finned plates are arranged at equal intervals.

[0015] In one embodiment, a guide plate is provided at the end of the radial flow packing away from the water inlet, and the guide plate covers the end of the vertical plate away from the water inlet.

[0016] In one embodiment, the upper end of the reaction chamber is a first guide cone with a diameter decreasing from bottom to top, and the upper end of the first guide cone is connected to the water inlet.

[0017] As one embodiment, the upper end of the mesh water distributor is provided with a second guide cone opposite to the water outlet pipe.

[0018] Based on the above description and practical application, the multi-stage stirred flocculation reactor of this invention utilizes the impact of wastewater input through the inlet pipe on the water impeller, causing the stirring shaft to rotate, which in turn drives the multi-stage stirring paddles on it to rotate. The overall reactor possesses strong reaction power, which gradually changes according to the growth requirements of the flocs. The lateral width of the stirring paddles decreases from bottom to top, and the stirring power also gradually decreases. In the lower part of the reaction chamber, during the initial stage of flocculation, sufficient power ensures full contact between the polymeric flocculant and the micro-flocs, promoting full floc growth. In the middle and upper parts of the reaction chamber, during the later stage of flocculation, micro-powered stirring prevents the flocs from being damaged after formation and allows them to enter the sedimentation zone. During the flocculation process, the polymeric flocculant fully integrates with the flocs, improving the utilization rate of the agent and increasing the size of the flocs. While improving the flocculation effect, no additional stirring device is required, reducing overall energy consumption. The multi-stage stirred flocculation reactor of this invention uses sludge lifting paddles at the lower end of the stirring shaft to lift the sludge from the bottom of the reaction chamber to the upper part, promoting the flocculation effect and reducing the amount of flocculant used.

[0019] In addition, the turbid water purification equipment of the present invention, through the cooperation of the mesh water distributor and the radial flow packing, diffuses the sewage along the radial flow packing to the outer periphery, so that the sewage is deposited and slides on the finned plates of the radial flow packing, which reduces the disturbance of water flow to the settling of flocs and sludge, reduces the number of flocs carried into the effluent zone, and improves the purification effect. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a turbid circulating water purification device according to one embodiment of the present invention, which includes a multi-stage stirring flocculation reaction device.

[0021] Figure 2 This is a schematic diagram of the longitudinal cross-sectional structure of the radial flow packing in a turbid water purification device according to one embodiment of the present invention.

[0022] Figure 3This is a schematic diagram of the transverse cross-sectional structure of the radial flow packing in a turbid water purification device according to one embodiment of the present invention.

[0023] Figure 4 for Figure 3 A magnified view of a portion of the image.

[0024] Figures 5a to 5c This is a side view of the water flow channel formed by two adjacent vertical plates of the radial flow packing in a turbid water purification device according to one embodiment of the present invention. Figure 5a The sludge deposited on the fin plate began to cause deformation of the fin plate. Figure 5b When the finned plate reaches the critical angle, the sludge begins to slide off. Figure 5c The finned plate returns to its initial angle after the sludge slides off.

[0025] The attached figures are labeled as follows: 1. Shell; 11. Outlet pipe; 12. Sludge hopper; 13. Circumferential seam water collection area; 21. Mesh water distributor; 211. Inlet; 212. Outlet hole; 22. Radial flow packing; 221. Vertical plate; 222. Finned plate; 223. Water flow channel; 224. Sludge flow channel; 23. Guide plate; 24. Second guide cone; 3. Multi-stage stirring flocculation reaction device; 31. Reaction chamber; 32. Stirring shaft; 33. Water wheel; 34. Stirring paddle; 35. Bearing bracket; 36. Bearing; 37. First guide cone; 38. Sludge lifting blade; 39. Sludge guide tube; 4. Inlet pipe; 5. Sludge discharge pipe. Detailed Implementation

[0026] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be more comprehensive and complete, and will fully convey the concept of exemplary embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0027] Furthermore, the accompanying drawings are merely illustrative of this disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted. It should be noted that in this disclosure, the terms "comprising," "configured with," and "set in" are used to indicate an open-ended inclusion, meaning that additional elements / components / etc. may exist besides those listed; the terms "first," "second," etc., are used only as labels and are not intended to limit the number or order of objects; the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention.

[0028] Unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0029] According to one embodiment of the present invention, a turbid circulating water purification device is provided, which is described below in conjunction with... Figures 1 to 5c The turbid circulating water purification equipment is described in detail below. The turbid circulating water purification equipment in this embodiment mainly includes a shell 1, a multi-stage stirring flocculation reaction device 3, a water inlet pipe 4, and a sludge discharge pipe 5.

[0030] The multi-stage stirred flocculation reaction device 3 will be described in detail below. This multi-stage stirred flocculation reaction device 3 mainly includes a reaction chamber 31, a stirring shaft 32, a water wheel 33, and a multi-stage stirring paddle 34.

[0031] The reaction chamber 31 is fixedly installed inside the shell 1, and its main body is a cylindrical structure. The upper end of the reaction chamber 31 is provided with a water outlet, and the lower end is sealed. A water inlet pipe 4 is provided on the side wall near the bottom of the reaction chamber 31. The water inlet pipe 4 passes through the shell 1 and extends into the reaction chamber 31 to input the wastewater to be purified into the reaction chamber 31.

[0032] A stirring shaft 32 is rotatably mounted inside the reaction chamber 31, with its axis coinciding with the axis of the reaction chamber 31. A water wheel 33 is fixedly mounted on the stirring shaft 32, with its blades facing the inlet pipe 4. Wastewater entering through the inlet pipe 4 drives the water wheel 33 to rotate, thereby driving the stirring shaft 32 to rotate using the power of the water flow. In this embodiment, the inlet pipe 4 is oriented in the same direction as the tangent of the reaction chamber 31, maximizing the efficiency of driving the water wheel 33 to rotate. Multi-stage stirring paddles 34 are sequentially mounted on the stirring shaft 32, with their lateral width decreasing from bottom to top.

[0033] like Figure 1 As shown, each stage of the agitator 34 includes blades at both ends and a connecting rod in the middle connected to the agitator shaft 32. The width of the agitator 34 near the lower end is greater than that of the agitator 34 near the upper end. When the agitator shaft 32 rotates, each stage of the agitator 34 rotates within the reaction chamber 31, agitating the wastewater within the reaction chamber 31 and generating different reaction forces. The lower agitator 34 has the largest width and agitation diameter, the highest agitation intensity, and a high GT value, enabling thorough mixing of the flocculant and wastewater; the upper agitator 34 gradually decreases in width and agitation diameter, gradually decreases in agitation intensity, and has a low GT value, protecting the already formed flocs and preventing floc breakage.

[0034] This multi-stage stirred flocculation reactor 3 utilizes the wastewater input through the inlet pipe 4 to impact the water wheel 33, causing the stirring shaft 32 to rotate, which in turn drives the multi-stage stirring paddles 34 on it to rotate. The reactor possesses strong reaction power, which gradually changes according to the growth requirements of the flocs. The lateral width of the stirring paddles 34 decreases from bottom to top, and the stirring power also gradually decreases. In the lower part of the reaction chamber 31, during the initial stage of the flocculation reaction, sufficient power ensures full contact between the polymeric flocculant and the micro-flocs, promoting full floc growth. In the upper middle part of the reaction chamber 31, during the later stage of the flocculation reaction, micro-powered stirring prevents the flocs from being damaged after formation and allows them to enter the sedimentation zone. During the flocculation reaction, the polymeric flocculant fully integrates with the flocs, improving the utilization rate of the agent and increasing the size of the flocs. While improving the flocculation effect, no additional stirring device is required, reducing overall energy consumption.

[0035] The multi-stage stirred flocculation reactor 3 also includes two or more bearing supports 35 for limiting the movement of the stirring shaft 32 and the stirring paddle 34 on it. In this embodiment, two bearing supports 35 are provided and fixed to the inner wall of the reaction chamber 31. The two ends of the stirring shaft 32 are rotatably connected to the center of the bearing supports 35 via bearings 36. For example, the stirring shaft 32 is connected to the bearing supports 35 via sliding bearings 36, which ensures that the stirring shaft 32 can rotate freely and also prevents the stirring shaft 32 from sliding axially under the impact of sewage.

[0036] In this embodiment, a sludge lifting blade 38 is fixedly installed at the lower end of the stirring shaft 32. When the stirring shaft 32 rotates, it drives the sludge lifting blade 38 to rotate synchronously. A sludge guide tube 39, fitted around the sludge lifting blade 38, is installed in the lower part of the reaction chamber 31. When the sludge lifting blade 38 rotates with the stirring shaft 32, it can lift the sludge from the lower part to the upper part. Therefore, some of the sludge in the lower part of the reaction chamber 31 will flow into the upper part of the reaction chamber 31 through the sludge guide tube 39 and mix with the sewage, promoting sewage flocculation and reducing the dosage of flocculant. Furthermore, in this embodiment, the lower center of the reaction chamber 31 is concave downwards, allowing the sludge in the lower part of the reaction chamber 31 to settle at the center, opposite to the sludge guide tube 39, facilitating its lifting to the upper part of the reaction chamber 31 for recycling.

[0037] The turbid water purification equipment, with the help of the aforementioned multi-stage stirring flocculation reaction device 3, can achieve better flocculation effect with relatively low energy consumption.

[0038] In this embodiment, the turbid water purification equipment further includes a mesh water distributor 21 and a radial flow packing 22. For example... Figures 1 to 5c As shown, the mesh water distributor 21 is a cylindrical structure with an inlet 211 at one end and a closed end at the other. Several outlet holes 212 are evenly arranged on the side wall of the mesh water distributor 21. The inlet 211 is connected to the outlet of the reaction chamber 31. Wastewater from the reaction chamber 31, after flocculation, enters the mesh water distributor 21 through the inlet 211. Guided by the closed structure at the top of the distributor, the wastewater passes through the outlet holes 212 and diffuses horizontally and evenly to the surrounding area, forming a radial water flow.

[0039] In this embodiment, the upper end of the reaction chamber 31 is provided with a first guide cone 37 whose diameter decreases from bottom to top. The upper end of the first guide cone 37 is connected to the inlet 211 of the mesh water distributor 21, guiding the flocculated sewage into the mesh water distributor 21.

[0040] The radial flow packing 22 includes several vertical plates 221 and several finned plates 222. The vertical plates 221 are fixed in a ring on the outer wall of the mesh water distributor 21, and water flow channels 223 are formed between adjacent vertical plates 221. In each water flow channel 223, several finned plates 222 are arranged horizontally or nearly horizontally. The first side of the finned plate 222 is fixedly connected to the vertical plate 221, and the side opposite to the first side is a downwardly inclined free end. A sludge flow channel 224 is formed between the free end and the adjacent vertical plate 221. An annular seam water collection area 13 is formed between the radial flow packing 22 and the inner wall of the shell 1. The purified water can be collected in this area and flow upward to the water outlet area enclosed by the guide plate 23 and the end cap at the upper end of the shell 1, and finally discharged through the water outlet pipe 11.

[0041] In this embodiment, the end of the radial flow packing 22 furthest from the inlet 211, i.e. Figure 1 At the top of the vertical plate 221, a guide plate 23 is provided. The guide plate 23 covers the end of the vertical plate 221 away from the water inlet 211, preventing the purified water from flowing around the top and guiding the water flow to diffuse outward.

[0042] In this embodiment, the width of the finned plate 222 increases from the end closer to the mesh water distributor 21 to the end farther away from the mesh water distributor 21. Since the water flow radiates and diffuses from the mesh water distributor 21 to the outer periphery, the water flow velocity is lower closer to the outer periphery. Increasing the width of the finned plate 222 can increase the area of ​​the water-blocking surface, thereby effectively intercepting sludge and improving the settling efficiency.

[0043] In this embodiment, the finned plate 222 is an elastic structural component. When a large amount of sludge is deposited on the finned plate 222, under the influence of gravity, the free end of the finned plate 222 deforms downward, increasing the angle between the finned plate 222 and the horizontal direction. When this angle exceeds the sludge accumulation angle, the sludge automatically slides into the sludge flow channel 224, and the finned plate 222 rebounds back to its initial angle after the external force is removed. Specifically... Figures 5a to 5c As shown. After a certain amount of sludge is deposited on the finned plate 222, the free end of the finned plate 222 begins to deform downwards, that is... Figure 5a As shown in the diagram; sludge continues to accumulate, and when the angle between the finned plate 222 and the horizontal direction increases to a critical angle (i.e., the sludge accumulation angle), the sludge begins to slide downwards. Figure 5b As shown in the diagram; after the sludge slides off, the finned plate 222 returns to its initial set angle, i.e. Figure 5c The state shown.

[0044] In this embodiment, several vertical plates 221 are evenly arranged around the outer periphery of the mesh water distributor 21, and several finned plates 222 are equally spaced in each water flow channel 223. Figures 3 to 5c As shown, the water flow channel 223 formed between adjacent vertical plates 221 allows sewage to diffuse outwards, and the sludge in it is deposited on the fin plate 222 and settles downwards through the sludge flow channel 224.

[0045] In this embodiment, a second guide cone 24 is provided at the upper end of the mesh water distributor 21, opposite to the outlet pipe 11. For example, the second guide cone 24 is positioned at the center of the guide plate 23. When residual sludge deposits on the guide plate 23, water can enter from the outlet pipe 11 in the reverse direction. The water flow is dispersed radially by the second guide cone 24, washing the sludge on the guide plate 23 into the annular seam water collection area 13, and then downwards into the lower sludge hopper 12, and discharged through the sludge discharge pipe 5.

[0046] In one specific embodiment, after coagulant and flocculant are added to the wastewater to be treated, it is rectified through the inlet pipe 4 and then impacts the water wheel 33 in the reaction chamber 31. Specifically, the water flow impacts the blades at the edge of the water wheel 33, causing the water wheel 33 to rotate at a speed of 60 r / min. The water wheel 33 drives the stirring shaft 32 to rotate, and the stirring paddle 34 connected to the stirring shaft 32 stirs the wastewater in the reaction chamber 31 as the stirring shaft 32 rotates. The stirring shaft 32 has multiple stages of stirring paddles 34 distributed from bottom to top. The stirring paddles 34 at the bottom have the largest stirring diameter, the highest stirring intensity, and a high GT value, which ensures that the reagents and wastewater are fully mixed. The stirring diameter and stirring intensity of the stirring paddles 34 at the top gradually decrease, and the GT value gradually decreases, which protects the already formed flocs and prevents the flocs from breaking. The water flow continues to flow upward, and under the guidance of the first guide cone 37, the water flow enters the mesh water distributor 21 and diffuses radially to the periphery through the outlet holes 212 into the radial flow packing 22. In the radial flow packing 22, the vertical spacing between adjacent finned plates 222 is 5 cm. The finned plates 222 deform under the gravity of the settled sludge. When the deformation angle increases by 5°~10°, the sludge on the finned plates 222 slides into the sludge flow channel 224. After sliding, the finned plates 222 rebound to their initial state. The sludge intercepted in the radial flow packing 22 settles downwards through the sludge flow channel 224, falls onto the outer wall of the first guide cone 37, and slides into the sludge hopper 12, and is discharged through the sludge discharge pipe 5. The purified water flows upwards into the annular slit water collection area 13 and is discharged from the device through the outlet pipe 11. The top of the radial flow packing 22 has a guide plate 23 with a second guide cone 24 at its center. When residual sludge appears on the guide plate 23, water is injected in reverse from the outlet pipe 11. The water flow is dispersed by the second guide cone 24 into a radial flow to sweep the sludge on the guide plate 23 into the annular seam water collection area 13 and then downward into the sludge hopper 12 and discharged through the sludge discharge pipe 5.

[0047] Compared with existing technologies, the multi-stage stirring flocculation reactor 3 has a stronger overall reaction force. This reaction force can be adjusted according to the application scenario by changing the diameter of the inlet pipe 4 and the size of the blades of the impeller 33, allowing the stirring shaft 32 to achieve different rotational speeds, thus achieving different reaction forces. By adjusting the size of the stirring paddle 34 and the stirring radius, different stirring intensities are achieved, providing the GT value required for flocculation of the target water body. This ensures that the polymer flocculant fully integrates with the flocs during the flocculation reaction, improving the utilization rate of the agent and increasing the size of the flocs. When sludge is deposited on the surface of the radial flow packing 22, the angle of the finned plate 222 undergoes reversible elastic deformation under the influence of the gravity of the deposited sludge. When the angle between the finned plate 222 and the horizontal direction is greater than the sludge accumulation angle, the sludge automatically falls off, and the finned plate 222 automatically rebounds to its normal tilt angle. The sludge enters the surface of the first guide cone 37 through the sludge flow channel 224 and is guided into the sludge hopper 12. Even when sludge deposits reappear on the surface of the first guide cone 37, the water flow impact through the bottom outlet 212 of the mesh distributor 21 will wash it into the sludge hopper 12, solving the problem of sludge clogging the water passage of the packing material in the packing area. Through the rotation of the sludge lifting blade 38 and the sludge guide tube 39, the sludge is returned upwards, increasing the flocculation carrier and reagent return, improving the flocculation effect, reducing reagent dosage, and the power required for sludge return is far lower than that using a venturi tube, improving the utilization efficiency of the kinetic energy of the primary sewage lifting operation. This turbid water purification equipment only has one sludge hopper 12 and a sludge discharge pipe 5, reducing the risk of sludge clogging and decreasing the number of associated sludge discharge valves and potential failure points.

[0048] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A multi-stage agitated flocculation reactor apparatus, characterized by, include: The reaction chamber is a cylindrical structure with an outlet at the top and a sealed bottom. The bottom side wall has an inlet pipe. A stirring shaft is rotatably mounted inside the reaction chamber, with its axis coinciding with the axis of the reaction chamber. A water wheel is fixedly mounted on the stirring shaft, opposite to the water inlet pipe, for driving the water wheel to rotate by means of water flow. A multi-stage agitator is sequentially arranged on the agitator shaft, with the lateral width of the multi-stage agitator decreasing from bottom to top.

2. The multi-stage mixing flocculation reactor apparatus as claimed in claim 1, wherein Also includes: Two or more bearing supports are fixed to the inner wall of the reaction chamber; The two ends of the stirring shaft are rotatably connected to the center of the bearing bracket via bearings.

3. The multi-stage stirred flocculation reaction device as described in claim 1, characterized in that, The lower end of the stirring shaft is fixedly equipped with a sludge lifting blade, and the lower part of the reaction chamber is equipped with a sludge guide tube that is sleeved on the outer periphery of the sludge lifting blade. When the sludge lifting blade rotates with the stirring shaft, it can lift the sludge from the lower part to the upper part.

4. A device for purifying turbid water, characterized by comprising: include: The multi-stage stirred flocculation reaction apparatus as described in any one of claims 1 to 3; A shell is fitted around the outer periphery of the reaction chamber, with a mud hopper formed at the lower end and a water outlet pipe provided at the upper end, wherein the reaction chamber is fixed inside the shell; A mud discharge pipe extends from one end through the housing to the mud hopper.

5. The apparatus for purifying the turbid seawater according to claim 4, wherein Also includes: The mesh water distributor has a cylindrical structure, with an inlet at one end connected to the outlet, and a sealed end. Several outlet holes are provided on the side wall. The radial flow packing includes several vertical plates and several finned plates. The vertical plates are fixed in a ring on the outer wall of the mesh water distributor. Water flow channels are formed between adjacent vertical plates. Several finned plates are arranged horizontally or nearly horizontally in each water flow channel. The first side of the finned plate is fixedly connected to the vertical plate, and the side opposite to the first side is a downwardly inclined free end. The free end and the adjacent vertical plate form a sludge flow channel. The radial flow packing forms an annular seam water collection area between itself and the inner wall of the shell.

6. The turbid water purification equipment as described in claim 5, characterized in that, The width of the finned plate increases from the end closer to the mesh water distributor to the end farther away from the mesh water distributor.

7. The turbid water purification equipment as described in claim 5, characterized in that, The finned plate is an elastic structural component.

8. The turbid water purification equipment as described in claim 5, characterized in that, Several of the aforementioned vertical plates are evenly arranged around the outer periphery of the perforated water distributor; In each of the water flow channels, a plurality of finned plates are arranged at equal intervals.

9. The turbid water purification equipment as described in claim 5, characterized in that, A guide plate is provided at the end of the radial flow packing away from the water inlet, and the guide plate covers the end of the vertical plate away from the water inlet.

10. The turbid water purification equipment as described in claim 5, characterized in that, The upper end of the reaction chamber is a first guide cone with a diameter decreasing from bottom to top, and the upper end of the first guide cone is connected to the water inlet.

11. The turbid water purification equipment as described in claim 5, characterized in that, The upper end of the mesh water distributor is provided with a second flow guide cone opposite to the water outlet pipe.

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