Flocculation concentration tank provided with double-moving-ring filter body

Abstract

A flocculation concentration tank with a double-moving-ring filtering body comprises a tank body, a stirring device arranged in the tank body, and a filtering cavity transversely arranged at the upper part of the tank body and immersed below the liquid level, the filtering cavity is provided with a filtrate discharging end which is communicated with the filtrate discharging mechanism; the filtering cavity comprises one or more sections of filtering units; each section of filtering unit comprises supporting plates on the two sides and a filtering section in the middle, each filtering section is formed by alternately stacking two groups of movable rings with different movement tracks, staggered movement with relative displacement is generated between every two adjacent different groups of movable rings, filtering seams are kept smooth, and effective solid-liquid separation is achieved. According to the utility model, the double-moving-ring filter body in reciprocating circular motion is adopted, the interaction range of the ring pieces is larger and uniform, and the eccentric device and the driving rod are arranged above the filter cavity side by side, so that the eccentric device is prevented from being soaked below filtrate for a long time to cause corrosion or faults.

Description

Technical Field

[0001] This utility model belongs to the technical field of solid-liquid separation equipment, specifically referring to a flocculation and concentration tank equipped with a double-moving-ring filter body. Background Technology

[0002] Dewatering treatment for sludge typically includes: a flocculation process, which uses flocculants to flocculate the sludge; and a dewatering process, which uses a dewatering machine to dewater the flocculated sludge.

[0003] The flocculation mixing tank allows sludge, after initial mixing with flocculant, to enter from the bottom. Agitators installed in the tank further mix the sludge and flocculant. At the top of the tank, the sludge, under the action of the flocculant, forms stable flocs. These flocs then flow by gravity from the sludge discharge port on the tank wall into the main body of the dewatering machine for dewatering. The flocculation mixing tank is a pre-processing unit for the main dewatering machine; typically, one flocculation mixing tank is connected to one or more main dewatering machines.

[0004] Chinese invention patent 202211069749.2 discloses a flocculation concentration tank with an independent self-cleaning slit filter chamber, which sets up a filter chamber inside a flocculation mixing tank. However, it has the following drawbacks: 1. The positioning rod is located at the bottom of the filter chamber, causing the closed ring plates to protrude downwards, limiting the height of the stirring blades inside the tank and affecting the stirring effect. 2. Only one set of closed ring plates moves within the filter chamber, while the other set is fixed, causing material to stagnate around the filter body, affecting the filtration effect. 3. A spray device needs to be added inside the chamber, complicating the structure, increasing installation difficulty and manufacturing costs, and causing the material to be dispersed during spraying, resulting in contaminated filtrate. 4. The drive motor is located at one end of the filter chamber, increasing the ineffective length of the main body and making installation relatively difficult. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a flocculation and concentration tank with a double dynamic ring filter body, which has a more reasonable and compact structural design and better water filtration effect.

[0006] This utility model is implemented as follows:

[0007] A flocculation and concentration tank equipped with a dual-ring filter body includes: a tank body, wherein a stirring device is provided in the tank body, and a filter chamber horizontally placed in the upper part of the tank body and submerged below the liquid surface; the filter chamber is provided with a filtrate discharge end connected to a filtrate discharge mechanism.

[0008] The filter chamber includes one or more filter units;

[0009] Each filter unit includes: two side support plates and a central filter section. The filter section is composed of two sets of movable rings with different motion trajectories stacked alternately. Each pair of adjacent sets of movable rings generates a staggered motion with relative displacement, keeping the filter gaps unobstructed and achieving effective solid-liquid separation. Each set of movable rings is provided with two or more connecting holes. Each set of movable rings is connected into a movable body through connecting rods sleeved in the connecting holes.

[0010] Each set of movable rings within each filter section has two or more sets of guide plates;

[0011] The two movable bodies are driven by a driving device to drive the guide plate to achieve the staggered movement of the two sets of movable rings with relative displacement;

[0012] One set of movable rings is separated from two adjacent movable rings by a gasket fitted on the connecting rod, and the thickness of the other set of movable rings is less than the thickness of the gasket, forming a filter gap;

[0013] The drive device includes: a motor, a gear transmission mechanism, and two or more drive rods;

[0014] The motor is connected to two or more drive rods through the gear transmission mechanism to move at the same speed and in the same direction. Each drive rod is connected to the guide plate through an eccentric device sleeved on it.

[0015] Each set of guide plates drives one set of movable rings to move along the same trajectory.

[0016] Each of the guide plates in the same group has an annular hole that matches the movable ring structure in the same group, and an eccentric device with the same eccentric direction and eccentric distance is provided at its upper end and connected to the driving rod; the eccentric direction and eccentric distance of the eccentric device provided on the guide plates in different groups are different.

[0017] The entire filter chamber shares a single drive unit;

[0018] The two support plates on both sides of each filter section are fixedly connected by a plurality of support rods surrounding the filter section.

[0019] Each of the support plates has a bearing at its upper end through which the two drive rods, which are allowed to make reciprocating circular motion, pass, and has an annular hole that matches the shape and position of the movable ring;

[0020] Each of the support plates is fixedly mounted on the frame inside the tank;

[0021] The serial connection hole on each of the movable rings in the same group is located inside the ring plate of the movable ring.

[0022] Furthermore, the bottom of the filter chamber is flat.

[0023] Furthermore, the two or more drive rods are arranged side by side.

[0024] Furthermore, the gear transmission mechanism is housed within a gearbox, and the motor is located on the side of the gearbox near the filter chamber.

[0025] Furthermore, the filter chamber is provided with two ring-shaped sealing plates on the side near the gearbox, and each ring-shaped sealing plate is connected to a set of movable rings through the connecting rod.

[0026] Furthermore, the tail end of the filter chamber is inclined downwards towards the outlet direction.

[0027] Furthermore, the filtrate discharge mechanism is a self-priming pump.

[0028] Furthermore, the stirring device is a stable stirring device with inclined blades.

[0029] Furthermore, the filter chamber is located inside the flocculation mixing tank on one side near the tank outlet.

[0030] The advantages of this utility model are:

[0031] 1. It adopts a double-ring filter body with reciprocating circular motion, which has a larger and more uniform interaction range of ring plates, resulting in better and more uniform and stable water filtration performance.

[0032] 2. The multi-section filter unit design uses segmented series rods for connection, which can reduce the load on the series rods.

[0033] 3. The eccentric device and the drive rod are arranged side-by-side above the filter chamber, preventing the eccentric device from being submerged in the filtrate for extended periods, which could lead to corrosion or malfunction. This facilitates observation, operation, and maintenance. The gear transmission mechanism is also protected from the risk of being affected by the filtrate, and installation and sealing design are convenient.

[0034] 4. The serial connection hole is located inside the ring plate, so the material on the outer periphery will not adhere to the ring plate and cause blockage of the filter chamber, so that the water filtration effect is smooth and stable. There is no need to add any spray or scraping device inside the chamber. The structure is simple and the manufacturing cost is lower.

[0035] 5. A ring-shaped sealing plate is installed at one end of the filter chamber, which is simple and practical in structure.

[0036] 6. One end of the filter chamber is elevated and slightly tilted towards the discharge end to allow material to flow away promptly without clogging. The other end is connected to a self-priming pump to promptly remove the filtrate from the chamber. This reduces the need for adjustments to the flocculation mixing tank, simplifies subsequent installation, and allows for the use of smaller pipe sizes.

[0037] 7. By using progressively lifting stirring blades, sludge sedimentation is prevented. The inertia of progressively lifting prevents sedimentation that would occur in areas without stirring blades in the filter chamber.

[0038] 8. The motor is located at one end of the gearbox near the filter chamber, reducing the ineffective length of the main body and making the structural design more reasonable and convenient for installation. Attached Figure Description

[0039] The present invention will now be further described with reference to the accompanying drawings and embodiments.

[0040] Figure 1 This is the front view of this utility model.

[0041] Figure 2 This is a top view of the present invention.

[0042] Figure 3 This is a schematic diagram of the exploded structure of the filter chamber in this utility model.

[0043] Figure 4 This is a structural schematic diagram of the movable ring in group A of this utility model.

[0044] Figure 5 This is a structural schematic diagram of the movable ring in group B of this utility model.

[0045] Figure 6 This is a schematic diagram of the structure of the A-group guide plate in this utility model.

[0046] Figure 7 This is a schematic diagram of the structure of the B group guide plate in this utility model. Detailed Implementation

[0047] like Figures 1 to 7 As shown, a flocculation and concentration tank with a double-ring filter body includes: a tank body 1, a stirring device 10 inside the tank body 1, and a filter chamber 2 horizontally placed above the tank body 1 and submerged below the liquid surface; the filter chamber has a filtrate discharge end connected to a filtrate discharge mechanism.

[0048] The filter chamber includes one or more filter units;

[0049] Each filter unit includes: two side support plates 21 and a central filter section 22.

[0050] Each filter section has 22 sections, consisting of two sets of movable rings with different motion trajectories, arranged in alternating layers. Each adjacent pair of A-rings and B-rings undergoes a staggered motion with relative displacement, maintaining unobstructed filter gaps and achieving effective solid-liquid separation. (To avoid visual clutter, ...) Figure 1 (Only a small segment of the movable ring is shown.)

[0051] like Figure 2 and Figure 3 As shown, ring A and ring B are square. Ring A has connecting holes A1 and A2 facing inward at the upper right and lower left ends of the diagonal of the square ring. Ring B has connecting holes B1 and B2 facing inward at the upper left and lower right ends of the diagonal of the square ring. Connecting rod A11 is fitted inside connecting hole A1 of ring A group and connecting rod A21 is fitted inside connecting hole A2 of connecting hole A2 of connecting ring A group to connect all ring A group into a movable body. Connecting rod B11 is fitted inside connecting hole B1 of ring B group and connecting rod B21 is fitted inside connecting hole B2 of connecting hole B2 of connecting ring B group to connect all ring B group into another movable body.

[0052] Each set of movable rings within each filter section contains three guide plates (A4 guide plate in group A and B4 guide plate in group B).

[0053] The two moving bodies are driven by a driving device to drive the guide plate to achieve the staggered movement of the A ring plate group and the B ring plate group with relative displacement;

[0054] Two adjacent A-ring plates are separated by a gasket B31 fitted on the connecting rod B11 and a gasket B32 fitted on the connecting rod B21. The thickness of the A-ring plate is less than the thickness of the gaskets B31 and B32, forming a filter gap.

[0055] The connecting hole is located inside the movable ring to prevent mud leakage and retention around the ring and to avoid affecting the space for setting up the mixing blades. On the other hand, the bottom of the square ring is horizontal, which also facilitates the setting up of the mixing blades.

[0056] The drive unit includes: a motor 3, a gear transmission mechanism 4, and two drive rods 5;

[0057] Motor 3 is connected to two drive rods 5 through gear transmission mechanism 4 to move at the same speed and in the same direction. Each drive rod 5 is connected to guide plate A4 and guide plate B4 of group A through eccentric device 6 sleeved on it.

[0058] In this embodiment, the A-ring plate group within the filter section has three guide plates A4, and the B-ring plate group has three guide plates B4. The three guide plates A4 drive the A-ring plate group to move along the same trajectory, and the three guide plates B4 drive the B-ring plate group to move along the same trajectory.

[0059] Below the guide plate A4 is a ring plate with the same structure as the movable ring of group A. Above it are two eccentric devices 6 with the same eccentric direction and eccentricity, connected to the drive rod 5. Below the guide plate B4 is a ring plate with the same structure as the movable ring of group B. Above it are two eccentric devices 6 with the same eccentric direction and eccentricity, connected to the drive rod 5. The eccentric directions and eccentricities of the eccentric devices 6 on guide plates A4 and B4 are different, so that the two groups of movable rings produce different motion trajectories. In this embodiment, the eccentric device 6 is located above the filter chamber, reducing the distance between the uppermost stirring blade and the bottom of the filter chamber. This ensures sufficient stirring and flocculation time and reduces the risk of material accumulation in parts of the filter chamber where stirring blades cannot be installed. Furthermore, if the eccentric device 6 or other guiding mechanisms are located below the filter chamber, these devices or mechanisms are easily affected by the filtrate, leading to corrosion or malfunction, and are inconvenient for observation, operation, and maintenance. Additionally, the gear transmission mechanism 4 is also at risk of being affected by the filtrate, and it also increases the difficulty of installation and sealing issues. Furthermore, the flatness of the bottom of the filter chamber further reduces the distance between the top stirring blade and the bottom of the filter chamber.

[0060] The entire filter chamber shares a single drive unit; in practice, there can be more than two active rods 5, and the number of eccentric devices 6 above each guide plate can also be more than two.

[0061] The two support plates 21 on both sides of the filtration section are fixedly connected by multiple support rods 7 surrounding the filtration section; the upper end of each support plate 21 has a bearing 8 through which two active rods 5, which can make reciprocating circular motion, pass, and the lower end has an annular hole that matches the shape of the movable ring. The long interaction distance between the ring plates in this reciprocating circular motion mode allows the filtrate to flow smoothly.

[0062] Each support plate is fixedly installed on the frame inside the tank 1;

[0063] The gear transmission mechanism 4 is located inside a gearbox 41, and the motor 3 is located on the side of the gearbox 41 near the filter chamber, which can effectively utilize the space.

[0064] Two ring-shaped sealing plates A5 and B5 are provided on the first end side of the filter chamber near the gearbox 41. Each ring-shaped sealing plate is connected to a set of movable rings, so that the filtrate is discharged from only one end. Compared with the existing technology of discharging the filtrate from both ends, the method of discharging the filtrate from one end is more convenient and economical. The use of this sealing plate is simple, practical and efficient, avoiding the complex structure and cost investment caused by considering sealing.

[0065] The tail end of the filter chamber is tilted downwards towards the outlet to allow the sludge that has settled or remained in the chamber to be discharged more smoothly, as the retention of sludge in the chamber is one of the reasons for the gradual weakening of the filtration effect.

[0066] The filtrate discharge mechanism is a self-priming pump. Using a self-priming pump simplifies installation, and drainage does not require interaction with the flocculation mixing tank, eliminating the need for structural modifications such as perforation or sealing of the flocculation mixing tank.

[0067] The mixing device uses progressively ascending mixing blades (see Chinese Invention Patent 202211473682.9, A Stable Mixing Device with Inclined Blades), which causes the sludge to rise. If traditional mixing blades are used, the sludge is not easy to rise and tends to stagnate at the bottom, resulting in uneven mixing.

[0068] The filter chamber is located on the side of the flocculation mixing tank near the outlet of the tank, which allows the material attached to the filter chamber to be transferred from the central axis side of the stirring blade to the outlet side, making the material less likely to be retained or blocked.

[0069] Sludge and flocculant enter and mix at the bottom of the flocculation mixing tank. Through progressively rising stirring blades, they rise and flocculate. The flocculated material reaches the upper layer and flows towards the outlet, passing through the filter chamber. Water flows into the filter chamber through its gaps. Due to the large and uniform relative displacement of the double-moving rings, the filter gaps remain unobstructed and stable, resulting in stable filtration. Solids, being larger than the filter gaps, are trapped outside the filter chamber. Thanks to the double-moving rings, solids are continuously and promptly removed, preventing blockage of the filter gaps around the outer edge of the filter chamber. Simultaneously, within the filter chamber, water flows towards the filtrate outlet. At this point, the slight tilt of the filter chamber helps to remove some residual solids from the filtrate, keeping the interior clean. The filtrate flows into the backflow tank and then through the opening of the flocculation mixing tank for direct discharge. Alternatively, the filtrate can be directly pumped away by a self-priming pump after reaching the backflow hopper at the end.

[0070] The above embodiments and figures are not intended to limit the product form and style of this utility model. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of this utility model.

Claims

1. A flocculation and concentration tank equipped with a dual-moving-ring filter body, characterized in that: include: The tank contains a stirring device and a filter chamber that is horizontally placed at the top of the tank and submerged below the liquid surface; the filter chamber has a filtrate discharge end that is connected to a filtrate discharge mechanism. The filter chamber includes one or more filter units; Each filter unit includes: two side support plates and a central filter section. The filter section is composed of two sets of movable rings with different motion trajectories stacked alternately. Each pair of adjacent sets of movable rings generates a staggered motion with relative displacement, keeping the filter gap unobstructed and achieving effective solid-liquid separation. Each set of movable rings is provided with two or more connecting holes. Each set of movable rings is connected into a movable body through connecting rods sleeved in the connecting holes. Each set of movable rings within each filter section has two or more sets of guide plates. The two movable bodies are driven by a driving device to drive the guide plate to achieve the staggered movement of the two sets of movable rings with relative displacement; One set of movable rings is separated from two adjacent movable rings by a gasket fitted on the connecting rod, and the other set of movable rings is thinner than the gasket, forming a filter gap; The drive device includes: a motor, a gear transmission mechanism, and two or more drive rods; The motor is connected to two or more drive rods through the gear transmission mechanism to move at the same speed and in the same direction. Each drive rod is connected to the guide plate through an eccentric device sleeved on it. Each set of guide plates drives one set of movable rings to move along the same trajectory. Each of the guide plates in the same group has an annular hole that matches the movable ring structure in the same group, and an eccentric device with the same eccentric direction and eccentric distance is provided at its upper end and connected to the driving rod; the eccentric direction and eccentric distance of the eccentric device provided on the guide plates in different groups are different. The entire filter chamber shares a single drive unit; The two support plates on both sides of each filter section are fixedly connected by a plurality of support rods surrounding the filter section. Each of the support plates has a bearing at its upper end through which the two or more drive rods that make reciprocating circular motion pass, and has an annular hole that matches the shape and position of the movable ring; Each of the support plates is fixedly mounted on the frame inside the tank; The serial connection hole on each of the movable rings in the same group is located inside the ring plate of the movable ring.

2. The flocculation and concentration tank with a double-moving-ring filter body as described in claim 1, characterized in that: The bottom of the filter chamber is flat.

3. A flocculation and concentration tank equipped with a dual-moving-ring filter body as described in claim 1, characterized in that: The two or more drive rods are arranged side by side.

4. A flocculation and concentration tank equipped with a dual-moving-ring filter body as described in claim 1, characterized in that: The gear transmission mechanism is housed in a gearbox, and the motor is located on the side of the gearbox near the filter chamber.

5. A flocculation and concentration tank with a dual-moving-ring filter body as described in claim 1, characterized in that: The filter chamber is provided with two ring-shaped sealing plates on the side of the gearbox where the gear transmission mechanism is located. Each ring-shaped sealing plate is connected to a set of movable rings through the connecting rod.

6. A flocculation and concentration tank equipped with a dual-moving-ring filter body as described in claim 1, characterized in that: The tail end of the filter chamber is inclined downwards towards the outlet.

7. A flocculation and concentration tank equipped with a dual-moving-ring filter body as described in claim 1, characterized in that: The filtrate discharge mechanism is a self-priming pump.

8. A flocculation and concentration tank equipped with a dual-moving-ring filter body as described in claim 1, characterized in that: The stirring device is a stable stirring device with inclined blades.

9. A flocculation and concentration tank equipped with a dual-moving-ring filter body as described in claim 1, characterized in that: The filter chamber is located inside the flocculation and concentration tank on one side near the outlet of the tank.

Images