Sludge concentrating and collecting device with bidirectional flow guide function

Abstract

The utility model relates to the technical field of sludge treatment, and discloses a sludge concentration and collection device with a bidirectional flow guide function, which comprises a sludge gravity concentration tank, and a float sludge bidirectional flow guide mechanism for guiding flow of float sludge in the sludge treatment process is arranged in the sludge gravity concentration tank. The float sludge bidirectional flow guide mechanism comprises an upper-layer float sludge flow guide assembly and a lower-layer float sludge flow guide assembly. The sludge concentration and collection device with the bidirectional flow guide function can effectively intercept floating sludge and bubbles outside a floating sludge concentration area and guide the floating sludge and bubbles to the inside for gathering, and a physical barrier is formed through the vertically arranged first mounting plate to prevent the floating sludge in the concentration area from diffusing outwards, so that the floating sludge is ensured to be fully concentrated in a limited area; the overflow liquid is prevented from escaping. The floating sludge outside the collection range of the upper-layer floating sludge flow guide assembly can be guided into the collection range of the upper-layer floating sludge flow guide assembly, the floating sludge collection area is enlarged, the movement direction of sinking sludge particles can be changed, and the floating sludge accumulation phenomenon is avoided.

Description

Technical Field

[0001] The utility model application relates to the technical field of sludge treatment, and specifically to a sludge concentration and collection device with a two-way flow guidance function. Background Art

[0002] Sludge treatment is a critical step in ensuring effluent quality meets standards and achieving resource utilization. Sludge thickening, as a pre-process for sludge treatment, has the core goal of separating water from sludge through gravity sedimentation, reducing sludge volume, and creating conditions for subsequent dewatering or disposal processes. While traditional sludge gravity thickening tanks can achieve basic sedimentation and concentration functions, in actual operation, a large number of bubbles are generated during anaerobic fermentation, carrying fine sludge particles to the surface of the tank. Without an effective interception mechanism, these bubbles will be directly discharged from the system with the overflow liquid, resulting in an increased sludge loss rate. This not only reduces concentration efficiency but also increases subsequent treatment load and reagent consumption.

[0003] To mitigate the problem of sludge escape, some concentrating tanks have implemented physical barriers by adding annular baffles or adjusting the height of overflow weirs. However, these improvements have limitations: while annular baffles can intercept some sludge, their fixed structure cannot adapt to water level fluctuations, and sludge accumulation areas can easily form outside the baffles, exacerbating the local anaerobic environment. While simply raising the overflow weir height can reduce sludge overflow, it reduces the effective volume within the tank and shortens the hydraulic retention time, directly impacting sedimentation efficiency. Furthermore, the intercepted sludge in existing technologies will repeatedly rise due to the continuous release of bubbles, eventually breaking through the barrier structure and escaping. Utility Model Content

[0004] The purpose of the utility model application is to provide a sludge concentration and collection device with a two-way guide function, which greatly improves the floating sludge collection efficiency through the floating sludge two-way guide mechanism, effectively prevents the floating sludge from escaping, and ensures efficient and stable sludge treatment.

[0005] To achieve the above-mentioned purpose, the utility model application provides the following technical solution: a sludge thickening and collection device with a two-way diversion function, comprising a sludge gravity thickening tank, wherein the sludge gravity thickening tank is provided with a mud inlet pipe, a central diversion tube, an overflow weir and an inspection bridge, a mud discharge pipe is provided at the bottom end of the sludge gravity thickening tank, the mud inlet pipe is connected to the interior of the central diversion tube, the overflow weir is located on the inner wall of the sludge gravity thickening tank, an overflow liquid collection tank is provided beside the overflow weir, an overflow liquid discharge port is provided in the overflow liquid collection tank, a floating mud two-way diversion mechanism for diverting floating mud in the sludge treatment process is provided in the sludge gravity thickening tank, and the floating mud two-way diversion mechanism includes an upper floating mud diversion assembly and a lower floating mud diversion assembly.

[0006] The upper layer floating mud diversion assembly is formed by welding a plurality of first mounting plates and second mounting plates in pairs, and is used to divert the floating mud and bubbles. The first mounting plates are vertically arranged and partially above the water surface.

[0007] The lower floating mud guide assembly is located below the upper floating mud guide assembly, and the lower floating mud guide assembly is formed by welding a plurality of third mounting plates in groups of two, and is used to guide floating mud and bubbles that float outside the collection range of the upper floating mud guide assembly.

[0008] Preferably, the first mounting plate is rectangular, and a fixing bracket is provided on the end surface of the first mounting plate, and the second mounting plate is in the shape of an isosceles trapezoid.

[0009] The bottom side of the first mounting plate in each group is equal in length to the short side of the second mounting plate and is welded together, and the angle between the first mounting plate and the second mounting plate is 150°.

[0010] Preferably, a plurality of first mounting plates are fixed to the inner wall of the sludge gravity thickening tank via a fixing bracket, and are formed into a cylinder along the inner wall of the sludge gravity thickening tank to form a floating sludge concentration zone.

[0011] A plurality of second mounting plates are arranged along the inner wall of the sludge gravity thickening tank in an inverted bucket shape to form a floating sludge diversion area.

[0012] Preferably, the third mounting plates are in the shape of an isosceles trapezoid, the short sides of the two third mounting plates in each group are welded, and the angle between the two third mounting plates is 120°.

[0013] Preferably, several groups of third mounting plates form an hourglass-shaped diversion area along the inner wall of the sludge gravity thickening tank to guide the floating sludge and air bubbles into the collection range of the upper floating sludge diversion assembly.

[0014] Preferably, the sludge gravity thickening tank is provided with a scraping mechanism comprising a drive device and a scraping assembly. The scraping assembly comprises a scraper blade, which is transmission-connected to the output end of the drive device, and a floating mud scraper blade. The scraper blade is used to scrape away the lower layer of floating mud in the sludge gravity thickening tank, which is then discharged through a mud discharge pipe. The floating mud scraper blade is used to scrape away the upper layer of floating mud in the sludge gravity thickening tank. The floating mud scraper blade comprises a fixed rod and a connecting scraper blade.

[0015] Preferably, the sludge scraping mechanism includes a proximity switch, which is composed of an induction switch arranged on the inner wall of the sludge gravity thickening tank and an induction head arranged outside the fixed rod.

[0016] Preferably, the sludge gravity thickening tank is provided with a floating sludge discharge assembly for discharging upper-layer floating sludge. The floating sludge discharge assembly comprises a support frame fixed to the inner wall of the sludge gravity thickening tank, a collection frame fixed to the top of the support frame, a shaftless screw conveyor disposed in the collection frame, a guide slope disposed on the exterior of the collection frame to assist the floating sludge in entering the collection frame, and a mud guide pipe disposed at one end of the collection frame to discharge the conveyed floating sludge. A trigger switch of the shaftless screw conveyor is connected to an inductive switch signal.

[0017] Compared to the prior art, the present invention provides a sludge concentration and collection device with a two-way flow diversion function, which has the following beneficial effects: This device incorporates a two-way flow diversion mechanism within the sludge gravity thickening tank. The upper-layer flow diversion assembly utilizes a 150° obtuse-angle structure formed by a first and second mounting plates, forming a cylindrical flow diversion zone along the tank wall. This effectively intercepts sludge and bubbles outside the flow diversion zone and guides them to accumulate within. Furthermore, the vertically positioned first mounting plates form a physical barrier, preventing sludge from dispersing outward within the concentration zone, thereby ensuring that the sludge is fully concentrated within the confined area and preventing it from escaping with the overflow liquid. The lower-layer flow diversion assembly, comprised of two sets of third mounting plates formed at a 120° angle, forms an hourglass-like structure. This not only guides sludge outside the upper-layer flow diversion assembly's collection range into its own collection range, expanding the sludge collection area, but also redirects the movement of sinking sludge particles, preventing sludge accumulation. In addition, through the linkage control of the scraping mechanism and the floating mud export component, the automatic collection and export of floating mud is realized, thereby improving the degree of automation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the three-dimensional structure of the sludge concentration and collection device with two-way flow guidance function applied for in this utility model Figure 1 ;

[0019] Figure 2 This is a schematic diagram of the top view of the sludge concentration and collection device with two-way flow guidance function applied for in the utility model;

[0020] Figure 3 Schematic diagram of the three-dimensional structure of the sludge concentration and collection device with two-way flow guidance function applied for in this utility model Figure 2 ;

[0021] Figure 4 This is a schematic diagram of a partial three-dimensional structure of the sludge concentration and collection device with a two-way flow guide function applied for by the present utility model;

[0022] Figure 5 This is a schematic diagram of the three-dimensional structure of the upper floating sludge diversion component in the sludge concentration and collection device with a two-way diversion function applied for by the utility model;

[0023] Figure 6 This is a partial structural diagram of the upper floating sludge diversion component in the sludge concentration and collection device with a two-way diversion function applied for by the utility model;

[0024] Figure 7 This is a schematic diagram of the three-dimensional structure of the lower layer floating mud diversion component of the sludge concentration and collection device with a two-way diversion function applied for by the utility model;

[0025] Figure 8 This is a schematic diagram of the partial structure of the lower layer floating sludge diversion component in the sludge concentration and collection device with two-way diversion function applied for by the utility model.

[0026] Figure: 1. Sludge gravity thickening tank; 11. Sludge inlet pipe; 12. Center guide tube; 13. Overflow weir; 141. Overflow liquid collection tank; 142. Overflow liquid discharge port; 15. Sludge discharge pipe; 16. Inspection bridge; 2. Sludge scraping mechanism; 21. Drive device; 22. Sludge scraping assembly; 221. Sludge scraper; 222. Floating mud scraper; 2221. Fixing rod; 2222. Connecting scraper; 23. Proximity switch; 231 , induction head; 232, induction switch; 24, floating mud guide assembly; 241, support frame; 242, collection frame; 243, shaftless screw conveyor; 244, guide slope; 245, mud guide pipe; 3, floating mud two-way diversion mechanism; 31, upper floating mud diversion assembly; 311, first mounting plate; 312, second mounting plate; 313, fixed bracket; 32, lower floating mud diversion assembly; 321, third mounting plate. DETAILED DESCRIPTION

[0027] In order to further understand the features, technical means, and specific objectives and functions achieved by the present utility model application, the present utility model application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0028] Example 1: Please refer to Figures 1-8 The present utility model provides a technical solution: a sludge thickening and collection device with a two-way diversion function, comprising a sludge gravity thickening tank 1, equipped with a sludge inlet pipe 11, a central diversion tube 12, an overflow weir 13, and an inspection bridge 16. A sludge discharge pipe 15 is provided at the bottom end of the sludge gravity thickening tank 1. The sludge inlet pipe 11 communicates with the interior of the central diversion tube 12. The overflow weir 13 is located on the inner wall of the sludge gravity thickening tank 1. An overflow liquid collection trough 141 is provided adjacent to the overflow weir 13. The overflow liquid collection trough 141 has an overflow liquid discharge port 142. The sludge gravity thickening tank 1 is equipped with a two-way floating mud diversion mechanism 3 for diverting floating mud during the sludge treatment process. The floating mud diversion mechanism 3 includes an upper floating mud diversion assembly 31 and a lower floating mud diversion assembly 32. The provision of the floating mud bidirectional diversion mechanism 3 effectively solves the problem of floating mud escape that is common in conventional sludge thickening tanks, thereby improving floating mud collection efficiency.

[0029] The upper floating mud diversion assembly 31 is composed of a number of first mounting plates 311 and second mounting plates 312, welded together in pairs, and is used to divert rising floating mud and bubbles. The first mounting plates 311 are vertically arranged and partially above the water surface. The first mounting plates 311 are rectangular, with fixed brackets 313 provided on their end faces. The second mounting plates 312 are isosceles trapezoidal in shape. The bottom edge of each first mounting plate 311 is welded to the shorter side of the second mounting plate 312, which is equal in length. The angle between the first mounting plate 311 and the second mounting plate 312 is 150°. This angle allows the floating mud to smoothly change direction after contacting the diversion plate, reducing energy loss and preventing the accumulation of floating mud on the diversion plate surface. Several first mounting plates 311 are fixed to the inner wall of the sludge gravity thickening tank 1 via fixing brackets 313. They form a cylindrical structure along the inner wall of the sludge gravity thickening tank 1 to form a floating sludge concentration zone. This design effectively limits the diffusion range of floating sludge and promotes its concentration within a limited area. Several second mounting plates 312 form an inverted bucket-shaped structure along the inner wall of the sludge gravity thickening tank 1 to form a floating sludge diversion zone, further enhancing the floating sludge diversion effect.

[0030] The lower-layer floating mud diversion assembly 32 is located below the upper-layer floating mud diversion assembly 31. The lower-layer floating mud diversion assembly 32 is composed of several third mounting plates 321 welded together in groups of two. It is used to divert floating mud and bubbles that rise outside the collection range of the upper-layer floating mud diversion assembly 31. The third mounting plates 321 are in the shape of an isosceles trapezoid. The short sides of the two third mounting plates 321 in each group are welded together, and the angle between the two third mounting plates 321 is 120°. This angle design enables the lower-layer diversion assembly to effectively guide floating mud outside the collection range of the upper-layer floating mud diversion assembly into the collection range of the upper-layer floating mud diversion assembly. Several groups of third mounting plates 321 form an hourglass-shaped diversion area along the inner wall of the sludge gravity thickening tank 1, guiding floating mud and bubbles into the collection range of the upper-layer floating mud diversion assembly 31, thereby expanding the floating mud collection area and improving the comprehensiveness of floating mud collection.

[0031] Example 2: Please refer to Figure 3-Figure 4 In combination with Example 1, it is further found that a sludge scraping mechanism 2 is provided in the sludge gravity thickening tank 1. The sludge scraping mechanism 2 includes a drive device 21 and a sludge scraping assembly 22. The sludge scraping assembly 22 consists of a scraper blade 221 and a floating sludge scraper 222, which are transmission-connected to the output end of the drive device 21. The scraper blade 221 is used to scrape off the lower layer of floating sludge in the sludge gravity thickening tank 1, and the lower layer of floating sludge is discharged through the sludge discharge pipe 15. The floating sludge scraper 222 is used to scrape off the upper layer of floating sludge in the sludge gravity thickening tank 1. The floating sludge scraper 222 includes a fixing rod 2221 and a connecting scraper 2222. The provision of the scraper mechanism 2 achieves comprehensive cleaning of the sludge in the sludge gravity thickening tank 1, preventing sludge accumulation at the tank bottom.

[0032] Furthermore, the sludge scraping mechanism 2 includes a proximity switch 23, which is composed of a sensor switch 232 mounted on the inner wall of the sludge gravity thickening tank 1 and a sensor head 231 mounted outside the fixed rod 2221. When the floating sludge scraper 222 rotates to the position of the sensor switch 232 near the switch 23, the sensor head 231 triggers the activation of the floating sludge discharge assembly 24, thus achieving automated linkage control of floating sludge scraping and discharge, and improving the automation level of the device.

[0033] Furthermore, the sludge gravity thickening tank 1 is provided with a floating sludge discharge assembly 24 for discharging the upper layer of floating sludge. This assembly 24 comprises a support frame 241 fixed to the inner wall of the sludge gravity thickening tank 1. A collection frame 242 is fixed to the top of the support frame 241. A shaftless screw conveyor 243 is installed within the collection frame 242. A guide ramp 244 is provided on the exterior of the collection frame 242 to facilitate the entry of floating sludge into the collection frame. A sludge guide pipe 245 is provided at one end of the collection frame 242. The trigger switch of the shaftless screw conveyor 243 is signal-connected to the sensor switch 232. When the sensor switch 232 is triggered, the shaftless screw conveyor 243 is activated, conveying the floating sludge in the collection frame 242 through the sludge guide pipe 245 to subsequent processing units. This enables the automatic collection and discharge of floating sludge, improving processing efficiency.

[0034] During operation, the sludge concentration and collection device with bidirectional flow diversion functions enters the central diversion tube 12 of the sludge gravity thickening tank 1 through the mud inlet pipe 11, where it undergoes initial sedimentation and concentration under the action of gravity. The lower layer of concentrated sludge settles to the tank bottom, while the upper layer of floating sludge, carrying air bubbles, rises to the overflow weir 13. The overflow liquid collection tank 141 then collects the supernatant liquid through the overflow liquid discharge port 142, preventing the floating sludge from being lost with the overflow.

[0035] The upper and lower sludge diversion assemblies 31 and 32 of the two-way sludge diversion mechanism 3 work together to efficiently intercept and guide sludge. The upper sludge diversion assembly 31 is welded together from a rectangular first mounting plate 311 and an isosceles trapezoidal second mounting plate 312, forming a 150° obtuse angle. It is secured to the outer wall of the overflow weir 13 by a fixing bracket 313, forming a cylindrical sludge concentration zone along the tank wall. The first mounting plate 311 is vertically positioned, its top elevated above the water surface to form a physical barrier. The second mounting plate 312 is fully submerged in the water, extending in an inverted funnel shape. When sludge and air bubbles outside the sludge concentration zone rise, they first contact the inclined surface of the second mounting plate 312 and are guided into the sludge concentration zone. The vertically positioned first mounting plate 311 blocks sludge from dispersing, effectively confining it to a confined area. This design not only ensures the full concentration of the floating mud, but also prevents the floating mud from escaping with the overflow liquid.

[0036] The lower floating mud guide assembly 32 is welded together from two sets of isosceles trapezoidal third mounting plates 321. The two sets of third mounting plates 321 are butted together at a 120° angle, forming an hourglass-like arrangement and mounted below the upper floating mud guide assembly 31. When floating mud outside the collection range of the upper floating mud guide assembly 31 rises to the lower floating mud guide assembly 32, it is guided by the third mounting plates 321 into the collection range of the upper floating mud guide assembly 31, thereby expanding the collection area. Furthermore, when sinking sludge particles contact the other third mounting plate 321, the angle of the plates changes direction, preventing surface accumulation.

[0037] The drive device 21 of the scraper mechanism 2 drives the scraper assembly 22, and the scraper blades 221 continuously scrape the concentrated sludge from the tank bottom and discharge it through the sludge discharge pipe 15. When the connecting scraper blade 2222 of the floating sludge scraper 222 rotates near the collection frame 242, the collection frame 242 receives the floating sludge pushed by the connecting scraper blade 2222 via the guide ramp 244. The sensor head 231 on the fixed rod 2221 triggers the sensor switch 232, activating the shaftless screw conveyor 243, which conveys the floating sludge in the collection frame 242. The floating sludge is then transported to the subsequent processing unit through the mud guide pipe 245.

[0038] The above embodiments merely represent one or several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A sludge concentration and collection device with a two-way flow guide function, comprising a sludge gravity concentration tank (1), wherein the sludge gravity concentration tank (1) is provided with a sludge inlet pipe (11), a central flow guide tube (12), an overflow weir (13) and an inspection bridge (16), a sludge discharge pipe (15) is provided at the bottom end of the sludge gravity concentration tank (1), the sludge inlet pipe (11) is communicated with the interior of the central flow guide tube (12), and the overflow weir (13) is located on the inner wall of the sludge gravity concentration tank (1), characterized in that: An overflow liquid collecting tank (141) is provided beside the overflow weir (13), and an overflow liquid discharge port (142) is provided in the overflow liquid collecting tank (141). A floating mud two-way guide mechanism (3) for guiding floating mud in the sludge treatment process is provided in the sludge gravity thickening tank (1), and the floating mud two-way guide mechanism (3) comprises an upper floating mud guide assembly (31) and a lower floating mud guide assembly (32); the upper floating mud guide assembly (31) is composed of a plurality of first mounting plates The first mounting plate (311) and the second mounting plate (312) are welded in pairs and used for guiding the floating mud and bubbles; wherein the first mounting plate (311) is vertically arranged and partially above the water surface; the lower layer floating mud diversion assembly (32) is located below the upper layer floating mud diversion assembly (31), and the lower layer floating mud diversion assembly (32) is welded in pairs by a plurality of third mounting plates (321) and used for guiding the floating mud and bubbles that float outside the collection range of the upper layer floating mud diversion assembly (31).

2. The sludge concentration and collection device with two-way flow guidance function according to claim 1, characterized in that: The first mounting plate (311) is rectangular, and a fixing bracket (313) is provided on the end surface of the first mounting plate (311), and the second mounting plate (312) is in the shape of an isosceles trapezoid; the bottom edge of the first mounting plate (311) in each group and the short edge of the second mounting plate (312) are of equal length and welded, and the angle between the first mounting plate (311) and the second mounting plate (312) is 150°.

3. The sludge concentration and collection device with two-way flow guidance function according to claim 2, characterized in that: A plurality of first mounting plates (311) are fixed to the inner wall of the sludge gravity thickening tank (1) via a fixing bracket (313), and are formed into a cylinder along the inner wall of the sludge gravity thickening tank (1) to form a floating sludge concentration zone; and a plurality of second mounting plates (312) are formed into an inverted bucket shape along the inner wall of the sludge gravity thickening tank (1) to form a floating sludge diversion zone.

4. The sludge concentration and collection device with two-way flow guidance function according to claim 1, characterized in that: The third mounting plates (321) are in the shape of an isosceles trapezoid, the short sides of the two third mounting plates (321) in each group are welded, and the angle between the two third mounting plates (321) is 120°.

5. The sludge concentration and collection device with two-way flow guidance function according to claim 4, characterized in that: Several groups of third mounting plates (321) are arranged along the inner wall of the sludge gravity thickening tank (1) to form an hourglass-shaped diversion area to guide floating sludge and air bubbles into the collection range of the upper floating sludge diversion assembly (31).

6. The sludge concentration and collection device with two-way flow guidance function according to claim 1, characterized in that: A sludge scraping mechanism (2) is provided in the sludge gravity thickening tank (1), and the sludge scraping mechanism (2) comprises a driving device (21) and a sludge scraping assembly (22); the sludge scraping assembly (22) comprises a sludge scraping plate (221) and a floating sludge scraping plate (222) which are transmission-connected to the output end of the driving device (21); the sludge scraping plate (221) is used to scrape off the floating sludge in the lower layer of the sludge gravity thickening tank (1), and the floating sludge in the lower layer is discharged through the sludge discharge pipe (15); the floating sludge scraping plate (222) is used to scrape off the floating sludge in the upper layer of the sludge gravity thickening tank (1); the floating sludge scraping plate (222) comprises a fixing rod (2221) and a connecting scraping plate (2222).

7. The sludge concentration and collection device with two-way flow guidance function according to claim 6, characterized in that: The sludge scraping mechanism (2) comprises a proximity switch (23), which is composed of an induction switch (232) arranged on the inner wall of the sludge gravity thickening tank (1) and an induction head (231) arranged outside the fixing rod (2221).

8. The sludge concentration and collection device with two-way flow guidance function according to claim 7, characterized in that: The sludge gravity thickening tank (1) is provided with a floating mud outlet assembly (24) for outlet upper floating mud. The floating mud outlet assembly (24) comprises a support frame (241) fixed to the inner wall of the sludge gravity thickening tank (1). A collecting frame (242) is fixed to the top of the support frame (241). A shaftless screw conveyor (243) is provided in the collecting frame (242). A guide slope (244) for assisting floating mud to enter the collecting frame (242) is provided on the outside of the collecting frame (242). A mud guide pipe (245) for outlet conveyed floating mud is provided at one end of the collecting frame (242). A trigger switch of the shaftless screw conveyor (243) is connected to a sensor switch (232) for signal transmission.

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