Multistage reinforced mixing device for multiphase components

Abstract

The utility model relates to the technical field of water treatment, in particular to a multi-phase component multi-stage reinforced mixing device which comprises an outer cylinder, an inner cylinder, a flow guide assembly, a turbulent flow assembly, a mixing and stirring assembly and the like, a first mixing area is formed in the outer cylinder, and feeding is performed in the circumferential tangential direction; a second mixing area provided with a mixing and stirring assembly is formed in the inner cylinder body; the flow guide assembly is located between the first mixing area and the second mixing area; a third mixing area is formed between the outer barrel and the inner barrel, and the turbulent flow assembly is arranged in the third mixing area. The overall structure is compact and simple; sewage is mixed through the rotational flow effect and the centrifugal effect of the first mixing area, meanwhile, components in the sewage are separated and sorted, heavy impurities are centrifugally separated and discharged, and other impurities enter the second mixing area and the third mixing area to be continuously subjected to mechanical mixing, circulating flow mixing and vortex flow mixing reaction; meanwhile, the particle size of the flocculation core is controlled, so that the mixing efficiency is improved, and the utilization rate of the coagulation agent is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to water treatment technical field, concretely relates to a multi-phase component multistage reinforced mixing device. BACKGROUND

[0002] Coagulation is the most widely used technology in water treatment, and mixing is an important part of the coagulation process. Mixing refers to the process of fully and uniformly dispersing reagents in water, which plays an important role in achieving good coagulation and sedimentation effects for subsequent processes.

[0003] Current mixing methods mainly fall into two categories: hydraulic mixing and mechanical mixing. Hydraulic mixing equipment is simple and easy to maintain, but it has poor adaptability to changes in water quantity and quality and insufficient resistance to impact loads. Mechanical mixing can adjust the frequency of the mixer to adapt to fluctuations in water quantity and quality, and the mixing effect is good, but it consumes a lot of energy and requires maintenance of the machinery.

[0004] In some coagulation and sedimentation processes, such as high-density sedimentation tanks, forced backflow of sludge from the partial sedimentation zone to the flocculation zone is used, and an elevator mixer and a guide cylinder are installed in the flocculation zone. The influent with coagulant and the backflow sludge continuously circulate in the flocculation zone to increase the sludge concentration of the flocculation reaction, provide flocculation nuclei, improve the density and settling performance of the flocculation, and make the effluent water quality more stable. Through contact flocculation and net capture of backflow sludge flocs, the removal efficiency of pollutants can be improved, the resistance to impact loads of the process can be improved, the coagulant dosage can be reduced, and the operating cost can be reduced.

[0005] In the water treatment industry, there is also a mixing method that combines hydraulic mixing and mechanical mixing to fully utilize the strengths of both types of mixing methods and overcome their respective weaknesses, ultimately achieving the goal of improving coagulation effects.

[0006] As the utility model discloses a high density reaction sedimentation tank discloses a water treatment device that is integrated with mixing, flocculation, sedimentation and sludge discharge, and the front end connected with the water inlet is a mechanical stirring flocculation mixing pool, the middle part is a mechanical stirring reaction pool, and the water outlet end is a sedimentation tank. The vortex mixing pool of coagulant aid and activated sludge reflux is arranged at the lower part of the mechanical stirring reaction pool. The device is internally provided with mechanical stirring mixing, and a stirring ladder is arranged in the vertical flow type water outlet corridor of the front section, secondary hydraulic mixing is carried out through the turbulence effect of the stirring ladder, meanwhile, the bottom surface of the horizontal type water outlet corridor of the rear section is arranged in a circular arc shape to form a vortex coagulation zone, and coagulant aid is added and sludge reflux is carried out in the zone, after water flow forms vortex and carries out third hydraulic mixing through the horizontal type water outlet corridor of the rear section, the water flow enters the mechanical stirring reaction pool. The device combines mechanical mixing with hydraulic mixing, and refluxes sludge floc at the end of the mixing reaction, which can be favorable for improving mixing effect, improving impact load capacity, realizing reuse of sludge flocculation and reducing coagulant dosage, but the scheme has the following defects: ① the stirring ladder is horizontally arranged, and mud is easy to accumulate on the stirring ladder, and if the stirring ladder is inclined, the turbulence effect will be reduced;② it is impossible to remove sand and gravel in the water inlet and larger and heavier flocs in the reflux sludge, and the vortex mixing zone at the bottom of the mechanical stirring reaction pool is easy to deposit, and the vortex mixing zone is arranged at the bottom of the mechanical stirring flocculation mixing pool and the mechanical stirring reaction pool, so that it is inconvenient to flush, and the bottom may be hardened after long-term operation, thereby affecting the flow capacity;③ the device forms vortex through the reflux sludge sprayed from the pipe opening, and the vortex scale is much larger than the floc scale, and the turbulence intensity is insufficient, so that the effect of promoting floc collision and mixing is limited.

[0007] In summary, there is an urgent need for a device with simple structure, strong applicability and good mixing effect to solve the problems in the prior art. Utility model content

[0008] The utility model aims at providing a multi-phase component multistage reinforced mixing device with simple structure, strong applicability and good mixing effect, and the specific technical scheme is as follows:

[0009] A multi-phase component multistage reinforced mixing device, comprising an outer cylinder, an inner cylinder, a flow guide assembly, a turbulence assembly, a mixing and stirring assembly, a water inlet, a sludge inlet, a water outlet and a sludge discharge outlet.

[0010] The outer cylinder comprises a first cylinder and a second cylinder arranged in series from top to bottom, the first cylinder comprises a first accommodating cavity with an open lower end, and the second cylinder comprises a second accommodating cavity with an open upper end and communicating with the first accommodating cavity; a first mixing area is formed at the junction of the first accommodating cavity and the second accommodating cavity, and a water inlet and a sludge inlet are arranged at the junction in a tangential direction; an upper portion of the first accommodating cavity forms a water outlet area, and a water outlet communicates with the water outlet area; a lower portion of the second accommodating cavity forms a sludge accumulation area, and a sludge discharge outlet communicates with the sludge accumulation area.

[0011] The inner cylinder is arranged in the first accommodating cavity and located between the water outlet area and the first mixing area, and the inner cylinder comprises a third accommodating cavity with openings at the upper and lower ends, and a second mixing area is formed in the third accommodating cavity; and a part of the mixing and stirring assembly is arranged in the second mixing area.

[0012] The flow guide assembly is arranged in the first accommodating cavity and located between the first mixing area and the second mixing area; a third mixing area is formed between the inner wall of the first cylinder and the outer wall of the inner cylinder, and the flow disturbance assembly is arranged in the third mixing area.

[0013] Preferably, the access direction of the sludge inlet is 180° rotated in a circumferential direction of the water inlet; and a dosing pipe is arranged on a pipeline communicating with the water inlet.

[0014] Preferably, the inner cylinder comprises an upper cylinder and a lower cylinder arranged in series, the upper cylinder is a cylindrical cylinder, the lower cylinder is a circular truncated cone cylinder with a narrow upper part and a wide lower part, and the inner diameter of the cylindrical cylinder is the same as the inner diameter of the upper end of the circular truncated cone cylinder; a part of the mixing and stirring assembly is located in the upper cylinder, and the flow disturbance assembly is arranged on the outer wall of the upper cylinder at the same height.

[0015] Preferably, the flow guide assembly comprises a ring-shaped flow guide single piece and a conical flow guide single piece, the ring-shaped flow guide single piece is arranged on the inner wall of the first accommodating cavity, and the conical flow guide single piece is located at the middle part of the first accommodating cavity; and the gap between the ring-shaped flow guide single piece and the conical flow guide single piece forms a flow passage.

[0016] Preferably, the flow disturbance assembly comprises a plurality of first flow disturbance plates arranged in a circumferential direction of the inner cylinder, and each first flow disturbance plate comprises a plurality of folded plates arranged in series; adjacent two first flow disturbance plates have the same structure or are mirror image structures; or the flow disturbance assembly comprises a plurality of second flow disturbance plates arranged in a circumferential direction of the inner cylinder, and each second flow disturbance plate comprises a connecting rod and a plurality of barbs arranged in a length direction of the connecting rod; the barbs on adjacent two second flow disturbance plates are symmetrically arranged or arranged in an up-down staggered manner.

[0017] Preferably, the upper end of the inner cylinder is arranged on the upper part of the inner wall of the first accommodating cavity through an upper support frame, and the lower end of the inner cylinder is arranged on the lower part of the inner wall of the first accommodating cavity through a lower support frame.

[0018] Preferably, the mixing and stirring assembly comprises a power source, a stirring shaft and lifting stirring blades, the power source is arranged on the outer cylinder, the connecting end of the stirring shaft is connected with the output end of the power source, the free end of the stirring shaft is inserted into the second mixing area, and the lifting stirring blades are arranged in the second mixing area and on the free end of the stirring shaft.

[0019] Preferably, a flow distribution device is arranged on the water inlet and / or the sludge feeding inlet, the flow distribution device comprises arc-shaped flow distribution plates for dispersing the water flow of the water inlet and / or the sludge feeding inlet.

[0020] Preferably, the cutting assembly is further arranged in the second mixing area, the cutting assembly comprises a plurality of cutting strips, the connecting end of the cutting strip is connected with the inner wall of the second mixing area, the free end of the cutting strip is arranged in an inclined upward manner, and the cutting strip is arranged at an angle of 45-75° with the inner wall of the second mixing area.

[0021] The technical scheme of the utility model has the following beneficial effects:

[0022] (1) The multi-phase component multi-stage reinforced mixing device comprises an outer cylinder, an inner cylinder, a flow guide assembly, a flow disturbance assembly, a mixing and stirring assembly, etc., a first accommodating cavity and a second accommodating cavity in the outer cylinder form a first mixing area at the junction, and the junction is provided with a water inlet and a sludge inlet for feeding in the tangential direction; the lower part of the second accommodating cavity forms a sludge accumulation area; the inner cylinder is arranged in the first accommodating cavity, a second mixing area is formed in the third accommodating cavity, the mixing and stirring assembly is arranged in the second mixing area and is used for providing upward power for the flow of fluid in the second mixing area; the flow guide assembly is arranged in the first accommodating cavity and is located between the first mixing area and the second mixing area; a third mixing area is formed between the inner wall of the first cylinder and the outer wall of the inner cylinder, and the flow disturbance assembly is arranged in the third mixing area. The device is compact and simple in structure, the water flow flows from bottom to top as a whole, the components in the first mixing area are relatively complex, the sewage is mixed through the cyclone effect and centrifugal effect of the first mixing area, and the components in the sewage are separated and sorted at the same time, large particles and heavy substances are centrifugally separated to the bottom sludge accumulation area and discharged from the system, the invalid substances are effectively reduced to participate in the mixing reaction, the small and light components enter the top second mixing area and third mixing area with the water flow to continue the reaction, under the multi-stage mixing effects of the mechanical mixing in the second mixing area, the micro-eddy current mixing in the third mixing area and the circulating flow mixing in the second and third mixing areas, the substances such as the water to be treated, the coagulant and the backflow sludge are fully contacted and collided, the medicament and the sludge are recycled, the mixing reaction effect and efficiency are improved, the impact load capacity of the mixing process is strengthened, the addition amount of the medicament is reduced, the operation cost is reduced, and the deposition and hardening of the mud, sludge floc and the like in the device are avoided. The backflow sludge can provide a large number of floc nuclei for the mixing and flocculation reaction, can greatly increase the particle collision probability, improve the compactness of the formed floc and improve the floc settling performance.

[0023] (2) The flow guide assembly in the utility model comprises a ring-shaped flow guide single piece and a conical flow guide single piece, the flow guide assembly separates the first mixing area located below and the second mixing area and the third mixing area located above into two relatively independent reaction zones, and the two reaction zones do not interfere with and disturb each other, the best conditions and efficient operation of each mixing zone are ensured, the water flow in the second mixing area and the third mixing area can be accurately controlled to promote the formation of the circulating flow and reduce the invalid dissipation of energy of the mechanical circulating mixing system.

[0024] (3) The turbulence component in this utility model includes multiple first turbulence plates or second turbulence plates arranged circumferentially along the inner cylinder. The unique structure of the turbulence component causes a large number of micro eddies with a scale close to that of flocs to be generated in the water flow or continuously changes the water flow velocity vector, creating a strong turbulence state, providing sufficient turbulence intensity, increasing and strengthening the collision between particles, coagulants and return sludge in the water flow, and further enhancing the mixing effect; at the same time, the energy provided by the mechanical circulation mixing system is fully used for the mixing reaction, and the energy is also efficiently utilized again.

[0025] (4) The mixing and stirring assembly in this utility model includes a power source, a stirring shaft, and lifting stirring blades. In addition to mechanical mixing, the mixing and stirring assembly in the second mixing zone can also provide sufficient power for the water flow from bottom to top from the first mixing zone into the second mixing zone, the third mixing zone, and the circulation flow within each mixing zone. At the same time, by adjusting the operating frequency and speed of the mixing and stirring assembly, the required circulating water flow rate and the flow velocity in the third mixing zone can be guaranteed, thereby improving the capture of small flocs, improving the mixing effect, and enhancing the resistance to shock loads. In addition, the lifting stirring blades can also break up larger floc particles in the water flow, cut larger flocs, and form smaller flocs with basically uniform particle size from larger flocs in the water flow. This forms more floc nuclei that can effectively participate in subsequent flocculation reactions, effectively increasing contact collision coagulation, netting, and other effects, improving the effect of subsequent flocculation reactions, increasing the removal rate of small particles and flocs in the water, and improving the settling performance of flocs. Meanwhile, by adjusting the rotation speed of the mixing and stirring components, the particle size distribution of the micro flocs can be optimized and controlled, thereby further improving the effect on subsequent flocculation reactions.

[0026] (5) The water inlet and / or sludge feed inlet of this utility model are provided with a diversion device. The diversion device can disperse the incoming water flow in the height direction, so as to form a vortex in the entire height direction of the first mixing zone, improve the effective utilization rate of the internal volume of the device, and at the same time avoid the ineffective consumption of kinetic energy and the destruction of the vortex in the first mixing zone when the incoming water flow is directly mixed with the internal vortex.

[0027] (6) This utility model includes a cutting component, which is disposed in the second mixing area and includes multiple cutting strips. The unique cutting component, combined with the mixing and stirring component, further cuts larger flocs.

[0028] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0029] The drawings constituting a part of the present application are used to provide further understanding of the present application, the schematic embodiments of the present application and the explanations thereof are used to explain the present application, and do not constitute improper limitation on the present application. In the drawings:

[0030] Figure 1 is a structural schematic view of the multi-phase component multi-stage reinforced mixing device in the preferred embodiment of the present application;

[0031] Figure 2 is Figure 1 is a cross-sectional view of the first mixing area in the first embodiment of the present application;

[0032] Figure 3 is Figure 1 is a cross-sectional view of the first turbulence component being the first turbulence plate in the first embodiment of the present application;

[0033] Figure 4 is Figure 3 is a partial schematic view of the first turbulence plate being unfolded in the first embodiment of the present application;

[0034] Figure 5 is Figure 1 is a cross-sectional view of the first turbulence component being the second turbulence plate in the second embodiment of the present application;

[0035] Figure 6 is Figure 5 is a partial schematic view of the second turbulence plate being unfolded in the second embodiment of the present application;

[0036] Figure 7 is Figure 1 is an unfolded view of the flow dividing device in the second embodiment of the present application;

[0037] Figure 8 is Figure 1 is a structural schematic view of the inner cylinder body and the cutting component after being assembled in the second embodiment of the present application;

[0038] Wherein, 1, outer cylinder body, 1.1, first cylinder body, 1.2, second cylinder body, 1.3, movable cover plate, A, first containing cavity, B, second containing cavity; 2, inner cylinder body, C, third containing cavity, 2.1, upper cylinder body, 2.2, lower cylinder body; 3, flow guide component, 3.1, annular flow guide single piece, 3.2, conical body flow guide single piece; 4, turbulence component, a, first turbulence plate, a1, folded plate; b, second turbulence plate, b1, connecting rod, b2, strip; 5, mixing and stirring component, 5.1, power source, 5.2, stirring shaft, 5.3, lifting stirring blade; 6, cutting component, 6.1, cutting strip; 7, water inlet; 8, sludge feeding port; 9, water outlet; 10, sludge discharge port; 11, dosing pipe; 12, upper support frame; 13, lower support frame; 14, flow dividing device; H1, first mixing area, H2, second mixing area, H3, third mixing area, H4, water outlet area, H5, sludge gathering area, H6, overflow channel. DETAILED DESCRIPTION

[0039] The embodiments of the utility model are described in detail below in combination with the drawings, but the utility model can be implemented in various different ways limited and covered by the claims.

[0040] Embodiment:

[0041] A multi-phase component multi-stage reinforced mixing device, including outer cylinder 1, inner cylinder 2, flow guide assembly 3, turbulence assembly 4, mixing stirring assembly 5, cutting assembly 6, water inlet 7, sludge feed inlet 8, water outlet 9, sludge discharge outlet 10 and dosing pipe 11, see Figures 1-8 , details as follows:

[0042] The outer cylinder 1 includes the first cylinder 1.1 and the second cylinder 1.2 arranged in series from top to bottom, the first cylinder 1.1 includes the first containing cavity A with the lower end opening, and the second cylinder 1.2 includes the second containing cavity B with the upper end opening and communicating with the first containing cavity A; the junction of the first containing cavity A and the second containing cavity B forms the first mixing area H1, and the junction is provided with the water inlet 7 and the sludge feed inlet 8 feeding along the tangent direction, see Figure 1 In the embodiment, the first cylinder 1.1 is a cylindrical body, the diameter is 3m, the height is 5m, the top of the first cylinder 1.1 is provided with an opening, and the opening is provided with a movable cover plate 1.3 for sealing the opening. The second cylinder 1.2 is a circular truncated cone cylinder, the inner diameter of the upper end is the same as the inner diameter of the first cylinder, the inner diameter of the bottom is 0.6-0.8 times of the inner diameter of the top, and the bottom of the second cylinder is sealingly arranged.

[0043] The water inlet 7 and the sludge feed inlet 8 feeding along the tangent direction are specifically: the access direction of the sludge feed inlet 8 is 180° rotation along the circumferential direction of the first mixing area H1, see Figure 2 ; the pipeline communicating with the water inlet 7 is provided with the dosing pipe 11. The water to be treated, the coagulant and the sludge all enter the first mixing area H1 along the circumferential tangent of the outer cylinder 1 in the clockwise direction, the water inlet and the backflow sludge with high flow rate are used to form a horizontal cyclone in the first mixing area H1, and the water inlet, the coagulant and the sludge are mixed. The unreacted agent molecules in the backflow sludge and the uncombined sites on the floc can participate in the mixing reaction again, realizing the secondary use of the agent and the resource utilization of the sludge.

[0044] In the embodiment, the water inlet 7 and the sludge feed inlet 8 are preferably provided with a flow dividing device 14, the flow dividing device 14 includes an arc-shaped flow dividing plate, see Figure 7The connecting end of the arc-shaped flow distribution plate is fixedly connected to the inner wall of the first mixing area H1, the free end of the arc-shaped flow distribution plate overhangs, and the distance between the free end of the arc-shaped flow distribution plate and the inner wall of the first mixing area H1 is 1 / 2-2 / 3 of the diameter of the corresponding water inlet 7 or sludge feeding port 8, the height of the arc-shaped flow distribution plate is 3 times the diameter, and the vertical center of the flow distribution device 14 is aligned with the center line of the corresponding water inlet 7 or sludge feeding port 8. The specific principle is: controlling the water inlet and sludge inlet directions to be clockwise or counterclockwise, and controlling the flow rate of the water inlet and sludge feeding port to be greater than or equal to 1.5 m / s, to form a cyclone on the horizontal plane in the first mixing area, to construct a cyclone mixing area, and to mix the water, coagulant and sludge for the first time through the cyclone effect. The flow distribution device 14 disperses the water flow entering the first mixing area H1 in the height direction, promotes the formation of a cyclone in the entire height direction of the first mixing area H1, improves the effective utilization rate of the internal volume of the device, and avoids the invalid consumption of kinetic energy and the destruction of the cyclone when the water flow directly mixes with the internal cyclone.

[0045] The inner cylinder 2 is arranged in the first containing cavity A and below the water outlet area H4, the inner cylinder 2 includes a third containing cavity C with openings arranged on the upper and lower parts, and a second mixing area H2 is formed in the third containing cavity C; part of the mixing and stirring assembly 5 is arranged in the second mixing area H2 to provide upward power for the flow of fluid in the second mixing area H2. In the embodiment, the inner cylinder 2 includes an upper cylinder 2.1 and a lower cylinder 2.2 arranged in series, the upper cylinder is a cylindrical cylinder, the lower cylinder is a circular truncated cone cylinder (i.e. a trumpet structure with a narrow upper part and a wide lower part), and the inner diameter of the cylindrical cylinder and the inner diameter of the upper end of the circular truncated cone cylinder are the same, and the cylindrical inner cavity of the upper cylinder and the circular truncated cone inner cavity of the lower cylinder form the third containing cavity C; part of the mixing and stirring assembly 5 is located in the upper cylinder 2.1, and the flow disturbing assembly 4 is arranged on the outer wall of the upper cylinder 2.1 at the same height. In the embodiment, the central axes of the outer cylinder 1 and the inner cylinder 2 are arranged in overlap, specifically, the first containing cavity A, the second containing cavity B and the third containing cavity C are arranged on the same central axis. The diameter of the inner cylinder 2 is always smaller than the diameter of the outer cylinder 1, and the inner cylinder 2 is installed at a middle upper position in the inner part of the outer cylinder 1.

[0046] The inner wall of the inner cylinder 2 is covered with a cutting assembly 6, the cutting assembly 6 includes a plurality of cutting strips 6.1, the connecting end of the cutting strip is connected to the inner wall of the second mixing area H2, and the free end thereof is arranged obliquely upward, and the included angle α between the cutting strip and the inner wall surface of the second mixing area H2 is arranged at an angle of 45°-75°, which will be described in detail in the following. Figure 8In this embodiment, the plurality of cutting strips are composed of a plurality of thin needle strips arranged in disorder, one end of the thin needle strip is fixedly connected with the inner wall of the inner cylinder, and the other end is inclined upward at an angle of 60° with the vertical direction. The length L of the thin needle strip is 1 / 8-1 / 6 of the diameter and does not exceed 200 mm. When a larger floc particle in the water flow collides with the cutting assembly during the upward movement, the larger floc particle is cut into smaller flocs.

[0047] The mixing and stirring assembly 5 is arranged at the central axis of the upper cylinder 2.1 and includes a power source 5.1, a stirring shaft 5.2, and lifting stirring blades 5.3. Details are shown in Figure 1 The power source 5.1 is arranged on the outer cylinder 1 (in this embodiment, the power source 5.1 is arranged on the movable cover plate 1.3). The connecting end of the stirring shaft 5.2 is connected with the output end of the power source 5.1, and the free end is inserted into the second mixing area H2. The lifting stirring blades 5.3 are arranged in the second mixing area H2 and on the free end of the stirring shaft 5.2. The lifting stirring blades can be arranged in a single layer or two or more layers in the height direction of the stirring shaft. In this embodiment, the power source 5.1 is composed of a motor and a speed reducer. The lifting stirring blades 5.3 are arranged in the middle of the inner cylinder 2 and provide mechanical mixing and stirring for the second mixing area H2. The lifting stirring blades 5.3 also provide power for the circulation of the fluid in the second mixing area H2 and the third mixing area H3. Under the stirring and lifting action of the mixing and stirring assembly 5, the water flow moves from bottom to top in the inner cylinder 2 (i.e., in the second mixing area H2) and forms a circulating flow with the fluid in the third mixing area H3. The water, coagulant, and sludge are mixed for the second time by the mechanical mixing and stirring action of the mixing and stirring assembly 5, and sufficient power is provided for the mixing reaction and the circulating flow. The circulating water quantity is 8-12 times the treatment water quantity, and the water flow velocity in the third mixing area H3 is not less than 0.4 m / s. The mixing effect and mass transfer efficiency are improved, the mixing reaction time is prolonged, and the anti-shock load capacity of the device is improved. The speed of the power source can be adjusted according to the actual mixing effect to adapt to different water quantities and water qualities.

[0048] The lifting stirring blades 5.3 of the second mixing area H2 can also break the larger floc particles in the water flow, and the larger flocs are cut by the cutting assembly 6. The larger flocs with different sizes in the water flow are formed into small flocs with basically the same particle size, more floc nuclei that can effectively participate in the subsequent flocculation reaction are formed, the contact and collision coagulation, net capture, and other effects are effectively increased, the subsequent flocculation reaction effect is improved, the removal rate of small particles, flocs, and other substances in the water is improved, and the settling performance of the flocs is improved. By adjusting the speed of the power source, the particle size grading of the small floc nuclei can also be optimized and controlled to further improve the improvement effect on the subsequent flocculation reaction.

[0049] The upper end of the inner cylinder 2 is arranged on the upper part of the inner wall of the first accommodating cavity A through the upper support frame 12, and the lower end of the inner cylinder 2 is arranged on the lower part of the inner wall of the first accommodating cavity A through the lower support frame 13, which will be described in detail below. Figure 1 In this embodiment, the upper support frame 12 and the lower support frame 13 are each formed by eight channel steels arranged uniformly along the axis direction of the cross section of the outer cylinder 1, and the two ends of the channel steels are respectively welded with the inner wall of the outer cylinder and the outer wall of the inner cylinder, so as to firmly fix the inner cylinder in the device. The upper end of the upper support frame is flush with the upper end of the upper cylinder 2.1 in the inner cylinder 2, and the lower end of the lower support frame is flush with the lower end of the upper cylinder 2.1 in the inner cylinder 2.

[0050] The third mixing area H3 is formed between the inner wall of the first cylinder 1.1 and the outer wall of the inner cylinder 2, and the turbulence assembly 4 is arranged in the third mixing area H3. In this embodiment, the third mixing area H3 is an annular flow passage formed between the outer wall of the inner cylinder 2 and the inner wall of the outer cylinder 1, and the turbulence assembly 4 is uniformly filled in the annular flow passage. The filling height of the turbulence assembly 4 is consistent with the upper cylinder 2.1 in the inner cylinder 2, and the two ends of the turbulence assembly 4 are respectively fixed with the outer wall of the inner cylinder 2 and the inner wall of the outer cylinder 1 by welding or expansion bolt connection. In the process of water flow passing through the turbulence assembly 4 from top to bottom, the water flow can be disturbed to create a turbulent hydraulic flow state, and the collision between particles, coagulants and return sludge in the water flow can be increased and strengthened by micro eddy current and turbulent flow, so as to perform the third mixing.

[0051] The turbulence assembly 4 has two structural forms, which are as follows.

[0052] The first kind: the turbulence assembly 4 includes a plurality of first turbulence plates a arranged at intervals in the circumferential direction of the inner cylinder 2, and each of the first turbulence plates a includes a plurality of folded plates a1 arranged in series, which will be described in detail below. Figure 3 and Figure 4 The structures of adjacent two first turbulence plates are the same or mirror images. In this embodiment, the first turbulence plates are arranged in the vertical direction, and the connecting parts (i.e. plate peaks) of the folded plates in adjacent two first turbulence plates are oppositely arranged, so as to separate the circular annular flow channel into a plurality of fan-shaped relative folded plate flow channels. The water flow can form a large number of micro eddy currents of various sizes inside under the action of the relative folded plates, which can effectively improve the collision and coagulation between particles, medicaments and flocs. The height of the folded plate is the same as the height of the upper cylinder 2.1 in the inner cylinder 2, and the two ends of the folded plate are fixed with the outer wall of the inner cylinder and the inner wall of the outer cylinder of the device by welding or expansion bolt connection. The specific specifications, the angle between the folded plates and the installation quantity of the folded plates are determined according to the actual size of the device, and the average flow velocity of each fan-shaped flow channel should be greater than or equal to 0.4 m / s to ensure sufficient turbulent intensity and improve the mixing effect.

[0053] The second kind: the spoiler assembly 4 includes a plurality of second spoiler plates b arranged along the circumference of the inner cylinder 2, and each second spoiler plate b includes a connecting rod b1 and a plurality of strips b2 arranged along the length of the connecting rod. Details are shown in Figure 5 and Figure 6 The strips b2 on adjacent second spoiler plates b are arranged in an up-down staggered manner. In this embodiment, the second spoiler plate is an angle steel element, the connecting rod b1 is a round steel, and the strip b2 is an angle steel. Specifically, the angle steel element is composed of a plurality of angle steels arranged in a vertical direction at equal intervals, and the corners of the angle steels all face upwards. The upper and lower two adjacent angle steels are fixed by welding with round steels of the same length at both ends. A plurality of sets of angle steel elements are arranged uniformly along the circumferential axis of the cross section of the outer cylinder 1, and the height of the spoiler assembly 4 is consistent with the height of the upper cylinder 2.1 in the inner cylinder. Since the angle steels and round steels in each set of angle steel elements are firmly welded, each set of angle steel elements only needs to be fixed by welding or expansion bolt connection between the two ends of the top angle steel and the outer wall of the inner cylinder 2 and the inner wall of the outer cylinder 1, respectively. The arrangement of the second spoiler plate b can continuously change the speed and direction of the water flow, increase the turbulence intensity, and thus increase the collision between particles, medicaments, and flocs, and promote the coagulation of particles. In addition, the two adjacent angle steel elements are arranged in a staggered manner in the height direction to strengthen the disturbance effect of the second spoiler plate b on the water flow. The specific specifications and models of the angle steels, the included angle between the angle steel elements, and the number of angle steel elements are determined according to the size of the device. It is appropriate to control the average flow velocity through the spoiler assembly to be greater than or equal to 0.4 m / s to ensure sufficient turbulence intensity and improve mixing effect.

[0054] The flow guide assembly 3 is arranged in the first containing cavity A and located between the first mixing area H1 and the second mixing area H2. In this embodiment, the second mixing area H2 is located above the first mixing area H1 and is separated by the flow guide assembly 3. The flow guide assembly 3 includes a ring-shaped flow guide single piece 3.1 and a conical flow guide single piece 3.2. Details are shown in Figure 1The annular flow guide member 3.1 is arranged along the inner wall of the outer cylinder 1, and the conical flow guide member 3.2 is arranged directly below the inner cylinder 2. The bottom surfaces of the annular flow guide member 3.1 and the conical flow guide member 3.2 are horizontal and have the same elevation, and the centers of the bottom surfaces overlap. The annular flow guide member 3.1 is connected and fixed to the inner wall of the outer cylinder 1, and the cross section of the annular flow guide member 3.1 is wedge-shaped, with the thicker side connected to the inner wall of the outer cylinder 1. The conical flow guide member 3.2 is arranged in the middle of the annular flow guide member 3.1, and the height of the conical flow guide member 3.2 is consistent with the thickness of the annular flow guide member 3.1. The bottom surface of the conical flow guide member 3.2 has a circular radius consistent with the width of the annular flow guide member 3.1. The annular gap formed by the annular flow guide member 3.1 has a width consistent with the width and the circular radius of the bottom surface of the annular flow guide member 3.1. The water in the first mixing area H1 flows from the top through the annular gap (i.e., the overflow passage H6) in the middle of the flow guide assembly 3 into the bottom of the second mixing area H2, and then enters the hydraulic circulation mixing process after mixing with the circulating flow in the second mixing area H2. The flow guide assembly 3 separates the first mixing area H1 and the second mixing area H2 into two relatively independent reaction zones, which do not interfere with each other and are beneficial to improving the reaction efficiency of each mixing zone. At the same time, the hydraulic flow state of the second mixing area H2 can be precisely controlled to guide the formation of the circulating flow, thereby reducing the invalid consumption of water head and electric energy. The specific mechanism is as follows: the water flow from the third mixing area H3 downward collides with the annular flow guide member 3.1, is blocked by the annular flow guide member 3.1, and is forced to change direction to flow downward along the inclined surface of the annular flow guide member 3.1, and then converges to the conical flow guide member 3.2. In the process, the water flow mixes with the first mixing area H1 flow flowing upward from the annular gap, and then changes direction to be inclined upward. The water flow reaches the upper part of the conical flow guide member 3.2 and the bottom of the inner cylinder 2 under the action of the inclined surface of the conical flow guide member 3.2 and the lifting action of the mixing and stirring assembly 5, and then enters the inner cylinder 2 to form the circulating flow.

[0055] The upper part of the first containing cavity A forms a water outlet area H4, and the water outlet 9 communicates with the water outlet area H4. In this embodiment, the water outlet area H4 is located at the top of the second mixing area H2 and the third mixing area H3, and the water outlet 9 is connected to the upper part of the water outlet area H4. The water flow after sufficient mixing and reaction flows out of the water outlet 9 at the top of the entire device.

[0056] The lower part of the second accommodating cavity B forms a sludge accumulation area H5, and the sludge discharge port 10 is communicated with the sludge accumulation area H5. The cyclone formed by the first mixing area H1 precipitates the heavier particles such as silt in raw water, silt or heavier flocs in return sludge into the sludge accumulation area H5, and the larger flocs formed by the second mixing area H2 and the third mixing area H3 also fall into the sludge accumulation area H5 under the action of cyclone after slowly falling into the first mixing area H1, and are discharged through the sludge discharge port 10 and the timing discharge device, so that the larger impurities in the water to be treated are removed, the invalid consumption of coagulant is reduced, and the silt deposition in the subsequent flocculation tank is avoided.

[0057] The multi-phase component multi-stage reinforced mixing device is applied to the embodiment, and specifically is:

[0058] The water to be treated, the reagent and the return sludge enter the first mixing area H1 from the water inlet 7 and the sludge feeding port 8 at the middle lower part. The water flow in the first mixing area H1 contains multi-phase components, including raw water liquid phase, particulate matter, colloid, coagulant and sludge floc components, and the first mixing is performed under the action of cyclone and centrifugal force in the first mixing area H1, and the sorting and separation are performed. The large particles and heavy substances are separated to the bottom sludge accumulation area H5 and discharged from the system, and the smaller and lighter components enter the upper second mixing area H2 and the third mixing area H3 with the water flow to continue the reaction. The second mixing area H2 forms a circulating flow under the mechanical stirring and lifting action of the mixing and stirring assembly 5, and the water flow participates in the mechanical mixing and micro-vortex mixing multiple times. Meanwhile, the lifting stirring blade 5.3 can scatter the flocs, and the cutting assembly 6 in the inner cylinder 2 can cut the larger flocs, so that the size of the flocs is accurately controlled, the function of the flocs as the subsequent flocculation reaction nucleus is strengthened, and the growth of the flocs is promoted. That is, the multi-phase component multi-stage reinforced mixing device can sort and separate the multi-phase components in the water flow while performing multi-stage reinforced mixing on the water flow, and the components invalid for the mixing and flocculation reaction in the water flow are gradually removed in the reaction process, the mixing efficiency and effect are improved, the size grading of the effective components is accurately controlled, the mixing and flocculation reaction effect is further promoted, the removal rate of pollutants is improved, and the addition amount of the coagulant is reduced.

[0059] The water flows from bottom to top, so that the large particles and heavy substances are easily separated from the water flow, and the invalid dissipation of internal water head is reduced, the sludge accumulation area is arranged at the bottom to collect and discharge the sludge, floc and other substances deposited in the reaction process, so that the device is prevented from being deposited with sludge and the maintenance work is reduced. The multi-phase component multi-stage reinforced mixing device has scientific and reasonable function settings, appropriate measure arrangement, smooth water flow, and the mixing measures with different reaction mechanisms are arranged according to the change law of the multi-phase components and the floc particle size in the sewage, so that the mixing measures are sequentially connected and mutually promoted, the mixing hydraulic time is prolonged, the impact load capacity is improved, the structure is compact, the occupied area is small, the device is convenient to implement, the device can be combined with various flocculation modes and flocculation tank types, the adaptability is strong, and the device is favorable for reducing the construction investment and operation cost.

[0060] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A multi-phase component multi-stage reinforced mixing device, characterized in that, The device comprises an outer cylinder (1), an inner cylinder (2), a flow guide assembly (3), a turbulence assembly (4), a mixing and stirring assembly (5), a water inlet (7), a sludge inlet (8), a water outlet (9) and a sludge outlet (10). The outer cylinder (1) comprises a first cylinder (1.1) and a second cylinder (1.2) arranged in series from top to bottom, the first cylinder (1.1) comprises a first accommodating cavity (A) with an open lower end, and the second cylinder (1.2) comprises a second accommodating cavity (B) with an open upper end and in communication with the first accommodating cavity (A); the junction of the first accommodating cavity (A) and the second accommodating cavity (B) forms a first mixing area (H1), and the junction is provided with a water inlet (7) and a sludge inlet (8) for feeding in a tangential direction; the upper part of the first accommodating cavity (A) forms a water outlet area (H4), the water outlet (9) is in communication with the water outlet area (H4); the lower part of the second accommodating cavity (B) forms a sludge accumulation area (H5), and the sludge outlet (10) is in communication with the sludge accumulation area (H5); The inner cylinder (2) is arranged in the first accommodating cavity (A), and the inner cylinder (2) is located between the water outlet area (H4) and the first mixing area (H1), the inner cylinder (2) comprises a third accommodating cavity (C) with openings at the upper and lower parts, and a second mixing area (H2) is formed in the third accommodating cavity (C); part of the mixing and stirring assembly (5) is arranged in the second mixing area (H2); The flow guide assembly (3) is arranged in the first accommodating cavity (A) and located between the first mixing area (H1) and the second mixing area (H2); a third mixing area (H3) is formed between the inner wall of the first cylinder (1.1) and the outer wall of the inner cylinder (2), and the turbulence assembly (4) is arranged in the third mixing area (H3).

2. The multi-phase component multi-stage reinforced mixing device of claim 1, wherein, The access direction of the sludge inlet (8) is 180° rotation of the access direction of the water inlet (7) along the circumference of the first mixing area (H1); A dosing pipe (11) is arranged on the pipeline in communication with the water inlet (7).

3. The multi-phase component multi-stage reinforced mixing device of claim 1, wherein, The inner cylinder (2) comprises an upper cylinder (2.1) and a lower cylinder (2.2) arranged in series, the upper cylinder is a cylindrical cylinder, the lower cylinder is a circular truncated cone cylinder with a narrow upper part and a wide lower part, and the inner diameter of the cylindrical cylinder and the inner diameter of the upper end of the circular truncated cone cylinder are the same; part of the mixing and stirring assembly (5) is located in the upper cylinder (2.1), and the turbulence assembly (4) is arranged on the outer wall of the upper cylinder (2.1) at the same height as the upper cylinder (2.1).

4. The multi-phase component multi-stage reinforced mixing device of claim 1, wherein, The flow guide assembly (3) comprises a ring-shaped flow guide single piece (3.1) and a conical flow guide single piece (3.2), the ring-shaped flow guide single piece (3.1) is arranged on the inner wall of the first accommodating cavity (A), and the conical flow guide single piece (3.2) is located at the middle part of the first accommodating cavity (A), and the gap between the ring-shaped flow guide single piece (3.1) and the conical flow guide single piece (3.2) forms a flow passage (H6).

5. The multi-phase component multi-stage reinforced mixing device of claim 1, wherein, The spoiler assembly (4) comprises a plurality of first spoiler plates (a) arranged along the circumference of the inner cylinder (2), and each of the first spoiler plates (a) comprises a plurality of folded plates (a1) arranged in series. Alternatively, the spoiler assembly (4) comprises a plurality of second spoiler plates (b) arranged along the circumference of the inner cylinder (2), and each of the second spoiler plates (b) comprises a connecting rod (b1) and a plurality of strips (b2) arranged along the length direction of the connecting rod; the strips (b2) on the adjacent two second spoiler plates (b) are symmetrically arranged or arranged in up-down staggered manner.

6. The multi-phase component multi-stage reinforced mixing device of claim 1, wherein, The upper end of the inner cylinder (2) is arranged on the upper part of the inner wall of the first accommodating cavity (A) through the upper support frame (12), and the lower end of the inner cylinder (2) is arranged on the lower part of the inner wall of the first accommodating cavity (A) through the lower support frame (13).

7. The multi-phase component multi-stage reinforced mixing device of claim 1, wherein, The mixing and stirring assembly (5) comprises a power source (5.1), a stirring shaft (5.2) and lifting stirring blades (5.3), wherein the power source (5.1) is arranged on the outer cylinder (1); the connecting end of the stirring shaft (5.2) is connected with the output end of the power source (5.1), and the free end thereof is inserted into the second mixing area (H2); the lifting stirring blades (5.3) are arranged on the free end of the stirring shaft (5.2) in the second mixing area (H2).

8. The multi-phase component multi-stage reinforced mixing device of claim 1, wherein, The water inlet (7) and / or the sludge feeding port (8) are provided with a flow dividing device (14); the flow dividing device (14) comprises an arc-shaped flow dividing plate for dispersing the water flow of the water inlet (7) and / or the sludge feeding port (8).

9. The multi-component multi-stage intensive mixing device according to any one of claims 1 to 8, characterized in that Further comprising a cutting assembly (6) arranged in the second mixing area (H2); The cutting assembly (6) comprises a plurality of cutting strips (6.1), the connecting end of each of the cutting strips is connected with the inner wall of the second mixing area (H2), and the free end thereof is arranged obliquely upward, and the cutting strip is arranged at an angle of 45°-75° with the inner wall surface of the second mixing area (H2).

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