Divergence-convergence combined energy-adjusting micropore curved surface flocculation device

Abstract

The invention discloses a divergence-convergence combined energy-adjusting microporous curved surface flocculation device for water treatment, water flow spirally enters from two sides of a bottom cone at different heights, divergence-convergence-divergence microporous curved plates are alternately arranged at a middle cylindrical main body to change the spatial and temporal distribution of kinetic energy of the water flow, so that the energy-adjusting effect of the water flow is improved, and the energy-adjusting effect of the water flow is improved. A vortex flocculation zone, a divergent flocculation zone, a divergent-convergent microporous flocculation zone, a convergent-divergent microporous flocculation zone and a divergent microporous flocculation zone are sequentially formed, under the action of a flocculation agent, a flocculation particle suspension layer is formed on the lower portion, a flocculation particle interception layer is formed on the top, flocculation can be enhanced, the content of the agent and pollutants in effluent can be further reduced, and the quality of the effluent can be improved. Therefore, the method has a good development prospect.

Description

Technical Field

[0001] The present invention relates to a diverging-converging combined energy-adjusting microporous curved surface flocculation device, belonging to the fields of water treatment technology and environmental protection. Background Art

[0002] Flocculation (coagulation, flocculation) is applied to water purification and is the most common and important unit operation in the water treatment process. Through flocculation, the colloidal particles in the water body are destabilized, and then the destabilized particles collide to form larger particles, and then separation is achieved to realize the purpose of water body purification.

[0003] The mutual collision and contact between particles are important conditions for flocculation. Flocculation is a process of "growth - breakage - regrowth" of flocs. The essence of water body purification is also a continuous process of flocculation - breakage - re-flocculation to remove impurities. In water treatment, the flocculation process needs to utilize the energy consumption in the water flow process to promote the mutual contact and collision of colloidal particles in the water, form larger particles, and better separate them from the water.

[0004] With the development of society, the water quality effluent standards are also constantly improving, and various new pollutants such as microplastics are constantly emerging. Moreover, the residual amount of flocculants (including coagulant aids) in the water body also needs to be further reduced. Therefore, improving the quality and efficiency of flocculation has become a potential trend in development.

[0005] In the Chinese patent with the application number 2022100526882, a shale gas fracturing flowback fluid flocculation treatment reactor is provided, which is provided with a primary flocculation reaction chamber, a secondary flocculation reaction chamber, a tertiary flocculation reaction chamber and an overflow collection tank, and forms an impact tangential flow through cross-flow water inlet. The volume design of the reactor is gradually expanded to achieve different flow velocity gradients. However, the water flow in the area below the inlet baffle of the reactor device is prone to short-circuiting, and as the mass of the flocs gradually increases, the flocs settle, and the flocs are prone to breakage due to backmixing. The water flow turbulence energy in the later stage of the flocculation reaction is relatively low, and an ideal flocculation effect cannot be achieved for the water quality containing fine colloidal particles.

[0006] In the Chinese patent with the application number 201520505936.X, a new type of pipeline flocculation reactor is provided. The whole is a horizontal pipeline structure, with the water inlet and the water outlet at the two horizontal ends respectively. The reactor is not provided with a mechanical stirring device, and a stirring effect is generated in the reactor through the change of the flow pattern. However, the flow velocity in the baffle area of the horizontal pipeline is too low, the flocculant cannot be fully mixed and reacted, and dead water areas are easily generated.

[0007] The present invention regulates the convergence and divergence of the water flow direction through a microporous curved surface, thereby adjusting the spatial distribution of kinetic energy in the reactor. As the water flows through different spaces, the velocity direction continuously diverges and changes, which is beneficial to the collision and flocculation of particles. Due to the setting of the microporous curved surface in the reactor, different flocculation regions are formed. As the micropore diameter gradually decreases, the interception ability of the microporous curved surface continuously improves, and the flocculation in the reaction zone progresses zone by zone, making the utilization of the chemical dosage more sufficient and reducing the use of the chemical dosage. Due to the micropore effect, a flocculation particle interception layer will be formed above the curved surface, thereby intercepting finer particles and ensuring the water quality of the effluent.

[0008] The microporous curved surface intercepts large flocculation particles, hydraulically breaks the particles passing through the micropores, increases the active sites of the flocs, and then larger floc particles can be formed through collision. The newly formed flocculation particles can be intercepted by the next microporous curved surface. Through a series of repeated actions such as flocculation - interception - fragmentation - interception, the flocculation effect in the later stage of the reactor is strengthened, the chemical content of the effluent is reduced, and the water quality of the effluent is improved. Summary of the Invention

[0009] Aiming at the technical deficiencies of the above-mentioned invention patent, the present invention proposes a divergent - convergent combined energy - regulating microporous curved surface flocculation device. The device is provided with a curved surface with micropores. The shape of the curved surface and the orientation of the micropores are combined and alternately distributed in the reactor, enabling the water flow direction to form an alternating change effect of aggregation or divergence inside the reactor. When the water flow passes through these curved surfaces, the kinetic energy can be regulated, evolving from a high kinetic energy in the middle to a water flow state where the high kinetic energy in the middle and the high kinetic energy around the periphery occur alternately, increasing the velocity gradient of the water flow, enhancing the energy consumption, increasing the degree of disorder and the collision rate of particles in the water. At the same time, there are a large number of micropores on the curved surface, which can intercept large flocs and also cause micropore flocculation, thereby strengthening flocculation and improving the purification quality of the water body.

[0010] The water flow of the present invention enters through the bottom of the reactor in a cross-flow (different heights and different positions) water inlet mode. On the one hand, the cross-flow water inlet mode is used to increase the turbulence intensity of the water body in the reactor, increase the velocity gradient of the flocculation reaction, and make the flocculation reaction more sufficient. As the water flow rises, the water flow velocity decreases, and the flocculation particles suspend or sink, thereby achieving the initial separation of flocs and water body. Under the action of the water flow, the fine flocs continue to rise. After passing through the micropores of the curved surface reactor arranged in the reactor, the water flow converges and gathers towards the middle through the micropore water flow setting, and micro-vortices are formed around the reactor. At this time, flocculation can be carried out fully and efficiently. On the other hand, the present invention further improves the water flow disturbance state in the reactor through three layers of curved surface microporous plates, adjusts the flow energy and the effective energy consumption of vortices in the fluidized bed, promotes the collision of flocculation particles, and realizes micropore flocculation and multiple interception effects by using the micropores of the multi-layer curved surface microporous plates. In order to implement the gradual upgrade and fine interception of flocculation, the size of the micropore diameter gradually decreases along with the water flow direction.

[0011] To achieve the above object, a divergent-convergent combined energy-adjusting microporous curved surface flocculation device is constructed, and the present invention provides the following technical solutions:

[0012] The device is provided with a water pump with spiral inlet pipes at different heights and different positions on both sides of the reactor (which can form a cross-flow water inlet mode). Flocculant and coagulant aids dosing ports are respectively arranged before and after the pump. The water body to be treated is mixed with the water treatment agent and enters the conical bottom of the reactor in a cross-flow manner. The cone is hermetically connected to the cylinder, and a sludge discharge pipe is connected to the bottom. The water body to be treated then enters the flocculation zone - vortex flocculation zone, divergent flocculation zone, divergent-convergent microporous flocculation zone, convergent-divergent microporous flocculation zone, and divergent microporous flocculation zone constructed by the cylindrical reactor, divergent microporous curved surface plate - convergent microporous curved surface plate - divergent microporous curved surface in sequence, so that the flocculation particles can undergo multiple flocculations to complete the gradual upgrade and progression of flocculation. Each flocculation reaction zone provides different water flow disturbances and turbulence energy intensities for the flocculation reaction process, which is more conducive to forming dense flocs and improving the flocculation effect. The treated water enters the overflow tank at the top of the cylinder and flows out through the drain pipe.

[0013] Furthermore, after the water body enters the reactor in a cross-flow manner (from different heights and different positions), a vortex flocculation zone will be formed, where the colloids collide violently and rapidly to form large flocs. At this time, a flocculation particle suspension layer will be formed, which has an interception effect on the flocs. Then, the fine particles passing through the flocculation suspension layer will pass through the divergent microporous flocculation zone. Due to the action of the divergent water flow, the large flocculation particles may break under the action of shear force, forming more active sites, which can collide with other multiple particles to form large flocs and be intercepted by the divergent microporous curved surface, thus forming a process of flocculation - fragmentation - re-flocculation - interception.

[0014] Furthermore, after the water flow passes through the divergent micropores, it will enter the divergent-convergent micropore flocculation zone. At this time, the shear force of the water flow is stronger, and the loose particles will be destroyed by the shear force, generating more active sites, which can attract more fine particles to collide and form large floc particles. In the convergent curved surface, the large floc particles will be intercepted, and in this area, the processes of fragmentation-flocculation-interception occur.

[0015] Furthermore, in the convergent-divergent micropore flocculation zone, the hydraulic shear rate is further enhanced, and the flocs will undergo fragmentation-flocculation, and at the same time, the floc particles will also be intercepted.

[0016] Furthermore, in the divergent micropore flocculation zone, at this time the shear rate decreases. As the water flow rises, the velocity of the particles decreases, and the heavier particles will sink, while the particles in the rising water flow will collide with the particles, thus forming a certain particle interception layer, which has an interception effect on the fine particles.

[0017] Furthermore, the aperture of the divergent-convergent-divergent micropore curved plate preferably decreases step by step to achieve progressive flocculation grading, gradually purify the water body, and reduce blockage. The aperture size can also be of an average size or increase in sequence.

[0018] Furthermore, an overflow pipe is provided on the overflow trough.

[0019] Furthermore, control valves are provided between the reactor drain pipe, the overflow pipe and the water inlet pipe.

[0020] Preferably, the aperture diameter of the curved micropore plate is 0.5 mm. Device Drawings

[0021] Figure 1 is the front view of the divergent-convergent combined energy-adjusting micropore curved surface flocculation device

[0022] Figure 2 is the side view of the divergent-convergent combined energy-adjusting micropore curved surface flocculation device

[0023] Figure 3 is the top view of the divergent-convergent combined energy-adjusting micropore curved surface flocculation device

[0024] Figure 4 is the divergent curved micropore plate

[0025] Figure 5 is the convergent curved micropore plate

[0026] Figure 6 is the three-dimensional view of the divergent-convergent combined energy-adjusting micropore curved surface flocculation device

[0027] Figure 7 is the schematic diagram of the internal flow line of the divergent-convergent combined energy-adjusting micropore curved surface flocculation device

[0028] Figure 8 It is a schematic diagram of the functional partition of a divergent-convergent combined energy-adjusting microporous curved surface flocculation device

[0029] In the figure: 1. Outlet trough; 2. Overflow pipe; 3. Divergent microporous curved panel I; 4. Convergent microporous curved panel; 5. Divergent microporous curved panel II; 6. Conical bottom of the device; 7. Sludge discharge pipe; 8. Outlet pipe; 9. Main body of the device; 10. Inlet pipe; 11. Pump; 12. Inlet; 13. Suspension layer of flocculation particles; 14. Interception layer of flocculation particles; 15. Valve; A. Vortex flocculation zone; B. Divergent flocculation zone; C. Divergent-convergent microporous flocculation zone; D. Convergent-divergent microporous flocculation zone, E. Divergent microporous flocculation zone; Specific implementation manners

[0030] The technical solution of the present invention will be further described below in combination with embodiments and the attached Figure 1-8 drawings

[0031] The cross-flow water inlet power device includes water inlets on both sides and a diaphragm metering pump. One end of the diaphragm metering pump is provided with a water body inlet (12), and the other end is connected to the water inlets on both sides. The energy-graded microporous plate is sequentially provided with a divergent microporous plate II (5), a convergent microporous plate (4), and a divergent microporous plate I (3). The water flow after reaction enters the overflow tank (1) and is discharged through the drain pipe (8).

[0032] In this embodiment, under the action of the pump (11), water is mixed with the flocculant and coagulant aid added before and after the pump (11) through the inlet (12), and enters the conical bottom (6) of the device in a swirling manner through the inlet pipe (10). Vortex flocculation will occur here to form a vortex flocculation zone (A). Colloidal particles collide in the vortex flocculation zone (A) to form large flocculation particles. As the water flow rises, part of the kinetic energy of the water body is converted into potential energy, and the running speed of the particles decreases, so a suspension layer of flocculation particles (13) will be formed at a certain position.

[0033] The fine particles in the water body follow the water flow. After passing through the suspension layer of flocculation particles (13), due to the divergent effect of the divergent microporous curved panel II (5) on the water flow direction, the velocity direction of the particles diverges and changes. Many small vortices will be generated in this area, and the collision probability of the particles increases, forming a divergent flocculation zone (B). The divergent microporous curved panel II (5) also has a certain interception effect on the flocs.

[0034] The water flow passes through the bottom divergent microporous curved panel II (5) and is affected by the convergent microporous curved panel (4), and a divergent-convergent phenomenon will occur to the water flow. The kinetic energy of the water body gradually changes from high in the middle to high at the periphery, and the direction and speed of the water flow change, which is conducive to particle collision. A divergent-convergent microporous flocculation zone (C) is formed here.

[0035] When the water flow passes through the convergent microporous curved panel (4) from the divergent-convergent microporous flocculation zone (C), due to the action of the upper divergent microporous curved panel I (3), the kinetic energy gradually changes from high around to high in the middle and finally back to high around. The direction and speed of the water flow also change, forming a convergent-divergent microporous flocculation zone (D). Under this energy distribution, the water flow forms a low kinetic energy zone in the central area and shows a convergent trend, that is, the water flow speed slows down and the water flow lines converge towards the center. As the water flow gradually moves away from the central area and enters the high kinetic energy zone around, the water flow speed increases, forming a divergent effect, further enhancing the turbulent kinetic energy of the water flow.

[0036] Subsequently, the water flow passes through the upper divergent microporous curved panel I (3), thereby forming a divergent microporous flocculation zone (E) on it. The water flow speed and energy also change, so as to improve the flocculation effect. Due to the frictional resistance of the device side wall and the top pressure, the water flow gradually returns to normal.

[0037] The divergent microporous curved panels I (3) and II (5) and the convergent microporous curved panel (4) all have an interception effect on fine flocs. A sludge discharge pipe (7) is arranged at the bottom of the device. The water body purified by multiple flocculations flows out of the device through the water outlet tank (1) and the water outlet pipe (8). The valve (15) is used to regulate the water flow or the mud flow.

[0038] Furthermore, the divergent microporous curved panels I (3) and II (5) and the convergent curved microporous plate (4) can be disassembled or backwashed.

Claims

1. A divergent-convergent combined energy-regulating microporous curved surface flocculation device for water treatment, characterized in that The conical bottom (6) of the device is provided with a mud discharge pipe (7) and a water inlet pipe (10) and is connected with a pump (11) and a water inlet (12). The main body (9) of the device is provided with a divergent microporous curved plate I (3), a convergent microporous curved plate (4) and a divergent microporous curved plate II (5). During the water treatment and purification process, a vortex flocculation zone (A), a divergent flocculation zone (B), a divergent-convergent microporous flocculation zone (C), a convergent-divergent microporous flocculation zone (D), and a divergent microporous flocculation zone (E) can be formed to form a flocculation particle suspension layer (13) and a flocculation particle interception layer (14). A water outlet trough (1) and a water outlet pipe (8) are also provided on the top of the device, and valves (15) are also provided on some pipes.

2. According to the device of claim 1, the convergent microporous surface (4) makes the water flow gather toward the center, and the divergent microporous surfaces I (3) and II (5) make the water flow toward the surroundings. The divergent microporous and convergent microporous surfaces are designed alternately, so as to perform combined adjustment on the distribution of kinetic energy in the device.

3. According to the device of claim 1, the water inlet pipe (10) adopts spiral cross-flow water inlet from different heights and directions on both sides.

4. According to the device of claim 1, the device is provided with five flocculation zones, including a flocculation zone (A), a divergent flocculation zone (B), a divergent-convergent microporous flocculation zone (C), a convergent-divergent microporous flocculation zone (D), and a divergent microporous flocculation zone (E).

5. The device according to claim 1 is provided with three layers of curved microporous plates, which are, from bottom to top, a divergent curved microporous plate (3), a convergent curved microporous plate (4) and a divergent curved microporous plate (5), and the apertures of the micropores gradually decrease.

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