Feeding and distributing device of belt type dehydrator

Abstract

The utility model discloses a material feeding and distributing device of a belt type dehydrator, which is arranged on the outer surface of one end of a rack and comprises a material feeding pipe, a material distributing pipe and a material distributing pipe, the mixer is arranged in the feeding pipe; the material distributing mechanism is arranged on the outer side of the material outlet and comprises a material distributing hopper with a bottom surface and two opposite side surfaces and at least two overflow weir walls arranged on the bottom surface of the material distributing hopper at intervals in the sludge flowing direction, and the width of the material distributing hopper is gradually increased in the sludge flowing direction; the length direction of any overflow weir wall is perpendicular to any side face, and the height of the overflow weir wall is gradually reduced from the middle to the two sides in the length direction of the overflow weir wall. A plurality of overflow weir walls are arranged on the bottom surface of the distribution hopper, so that the flow speed of sludge and uniform distribution can be ensured, and the sludge is fully distributed in the whole distribution hopper; furthermore, a material distribution adjusting weir gate, a counterweight rod and a counterweight block are additionally arranged, so that the sludge falling onto the filter cloth can be further ensured to be uniformly distributed. The structure is simple and practicability is high.

Description

Technical Field

[0001] This utility model relates to the field of environmental protection equipment technology, specifically to a feeding and feeding device for a belt dewatering machine. Background Technology

[0002] Sludge dewatering is the last step in the general wastewater treatment process. The efficiency of sludge dewatering and the moisture content of the dewatered sludge cake not only have a significant impact on the entire wastewater treatment process and the smooth operation of the wastewater treatment plant, but also often directly affect the economic benefits of the wastewater treatment plant.

[0003] Deep dewatering of sludge is a popular sludge dewatering process with significant social and economic benefits. Methods for deep sludge dewatering include applying absolute high pressure to the dewatering equipment to squeeze water out of the sludge, and adding chemicals to the sludge beforehand to fully release the water before pressing it out. Some methods also include a drying process to further dry the sludge cake. Commonly used sludge dewatering equipment includes horizontal plate and frame filter presses, screw presses, belt dewatering machines, and centrifugal dewatering machines. While these are undoubtedly mature dewatering devices with their own advantages, they still have some drawbacks, such as high energy consumption, high cost, large footprint, and high operating and maintenance costs.

[0004] Belt conveyor sludge dewatering machines are devices used to treat sludge, commonly found in wastewater treatment plants, chemical plants, paper mills, and other similar locations. Existing belt conveyor dewatering machines for sludge treatment typically have a sludge guide hopper at the front of the mixer to transport sludge into the mixer. However, this type of sludge guide hopper is generally static, relying on a conical design to allow the sludge to slide out of the discharge port along the slope. This structure, however, prevents the sludge from being evenly distributed onto the filter belt. To address this technical problem, for example, Chinese patent document CN203798125U discloses a feeding hopper for a belt dewatering machine. To ensure even sludge distribution, a distribution plate and a lifting mechanism are installed inside the sludge guide hopper. The distribution plate slides within the hopper, and its height is adjusted by the lifting mechanism to achieve uniform material distribution. However, this structure is relatively complex, including a slide, a lifting mechanism, and an adjustment mechanism for adjusting the lifting mechanism. In addition, in order to install the lifting mechanism, a slide needs to be set on the side of the hopper. Sludge entering the slide will increase the difficulty of lifting and adjusting the lifting mechanism and make subsequent cleaning inconvenient. Further improvements are needed, hence this utility model. Utility Model Content

[0005] In view of at least one of the above-mentioned technical problems, the purpose of this utility model is to provide a feeding and spreading device for a belt dewatering machine.

[0006] The technical solution of this utility model is:

[0007] The purpose of this utility model is to provide a feeding and spreading device for a belt dewatering machine. The belt dewatering machine includes a frame, and the feeding and spreading device is disposed on the outer surface of one end of the frame and includes:

[0008] The feed pipe has a feed inlet, a discharge outlet, and a dosing inlet;

[0009] A mixer is disposed inside the feed pipe;

[0010] A feeding mechanism is located outside the discharge port and includes a feeding hopper having a bottom surface and two opposite sides, and at least two overflow weirs spaced apart on the bottom surface of the feeding hopper along the sludge flow direction. The width of the feeding hopper gradually increases along the sludge flow direction, and the length direction of any overflow weir is perpendicular to any side surface, and the height of the overflow weir gradually decreases from the middle to both sides along its length direction.

[0011] Preferably, the fabric feeding mechanism further includes an openable and closable fabric feeding adjustment gate located at the outlet of the fabric hopper, wherein the top end of the fabric feeding adjustment gate is rotatably connected to the two sides at the outlet of the fabric hopper and the bottom end slides in contact with the bottom surface.

[0012] Preferably, the fabric adjusting weir gate includes a main body and an extension located at the bottom end of the main body and forming an angle with the main body. The extension and the main body are connected by an arc to form an arc transition portion, and the fabric adjusting weir gate slides in contact with the bottom surface through the arc transition portion.

[0013] Preferably, the top of the fabric regulating weir gate is rotatably connected to the two sides of the fabric hopper via a rotating shaft. The two ends of the rotating shaft extend axially beyond the two sides and are respectively connected to a counterweight rod. A movable counterweight block is provided on each of the counterweight rods.

[0014] Preferably, the counterweight has a transverse through hole through which the counterweight rod passes, and its top and / or bottom surfaces have threaded holes extending to the through hole. A fastening screw is threaded into the threaded hole, and the inner end of the fastening screw is adapted to press against the outer surface of the counterweight rod when the counterweight moves to a predetermined position to lock the counterweight on the counterweight rod.

[0015] Preferably, the height of the middle position of any of the overflow weir walls is 1 / 3 to 1 / 2 higher than the height of the lowest positions on both sides.

[0016] Preferably, along the sludge flow direction, the height of the rear overflow weir wall of any two adjacent overflow weir walls is 1 / 3 to 1 / 2 lower than the height of the front overflow weir wall.

[0017] Preferably, the width of the outlet end of the cloth hopper is 2 / 3 of the width of the filter cloth of the belt dewatering machine.

[0018] Preferably, the feed inlet is located on the bottom end face of the feed pipe, and the dosing port is located on the side wall face of the lower end of the feed pipe.

[0019] Compared with the prior art, the advantages of this utility model are:

[0020] This utility model discloses a feeding and distributing device for a belt dewatering machine. By setting multiple overflow weirs on the bottom surface of the distributing hopper, it can ensure the flow rate of sludge and the uniform distribution of the distributing material across the entire width of the distributing hopper. Furthermore, by adding a distributing adjustment weir gate, a counterweight rod, and a counterweight block, it can further ensure the uniform distribution of sludge falling onto the filter cloth. The structure is simple and highly practical. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0022] Figure 1 This is a side view of one structure of the feeding and feeding device according to an embodiment of the present utility model;

[0023] Figure 2 for Figure 1 A schematic diagram of the main structure of the feeding and feeding device;

[0024] Figure 3 This is a side view of another structure of the feeding and feeding device according to an embodiment of the present utility model;

[0025] Figure 4 for Figure 3 A schematic diagram of the main structure of the feeding and feeding device.

[0026] The components are as follows: 11. Feed pipe; 111. Feed inlet; 112. Dosing port; 113. Discharge port; 12. Mixer; 13. Cloth distribution mechanism; 131. Cloth distribution hopper; 1311. Bottom surface; 1312. Side surface; 132. Overflow weir wall; 133. Cloth distribution regulating weir gate; 1331. Main body; 1332. Extension section; 1333. Arc transition section; 134. Counterweight rod; 135. Counterweight block; 20. Filter cloth. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0028] See Figures 1 to 4 This utility model discloses a feeding and distributing device for a belt dewatering machine, wherein the belt dewatering machine includes a frame and filter cloths 20 (including an upper filter cloth 20 and a lower filter cloth 20 arranged opposite each other and forming a closed loop by several guide rollers). In this embodiment, the feeding and distributing device is located at one end of the frame, specifically the right end of the frame, without further description or limitation. Specifically, the feeding and distributing device includes a feed pipe 11, a mixer 12, and a distributing mechanism 13.

[0029] The feed pipe 11 is shaped like an inverted L or a horizontal inverted T, meaning it includes a vertical main pipe and a horizontal discharge pipe. The lower end of the main pipe has a feed inlet 111 (for liquid sludge to be dewatered) and a dosing inlet 112 (for flocculant). The feed inlet 111 is located at the bottom of the feed pipe 11, and the dosing inlet 112 is located on the side wall of the feed pipe 11, with the two roughly perpendicularly distributed. The feed inlet 111 can be connected to a feed pump (not shown), and the dosing inlet 112 can be connected to a dosing pump (not shown). It should be noted that the feed pump and / or dosing pump are not integral with the feeding and distributing device of this embodiment; they are preferably external components. The discharge pipe has an discharge port 113 at its outer end. The mixer 12 is rotatably disposed inside the feed pipe 11. The feed pipe 11 and the mixer 12 constitute a conventional non-powered mixer 12 or a tubular static mixer 12. The specific structure and working principle are not described in detail, but can be easily understood and implemented by those skilled in the art.

[0030] The material distribution mechanism 13 is located below and to the outside of the discharge port 113. In this embodiment of the invention, the material distribution mechanism 13 includes a material distribution hopper 131, an overflow weir wall 132, a material distribution regulating weir gate 133, a counterweight rod 134, and a counterweight block 135. For example... Figure 2 and Figure 4 As shown, the feeding hopper 131 is a U-shaped structure, that is, it has a bottom surface 1311 and two side surfaces 1312. Along the sludge flow direction, i.e., the discharge direction, the two side surfaces 1312 expand outwards, meaning the feeding hopper 131 is funnel-shaped, and the width of the bottom surface 1311 of the feeding hopper 131 gradually increases. Preferably, in this embodiment of the invention, in order to ensure uniform sludge distribution at the feed end of the upper and lower filter cloths 20 of the feeding hopper 131, which is beneficial to improving the subsequent dewatering effect, in this embodiment of the invention, the width of the outlet end of the feeding hopper 131 is approximately 2 / 3 (including 2 / 3) of the width of the filter cloth 20 of the belt dewatering machine. The number of overflow weirs 132 is at least two. Figure 1 Two examples are provided. Figure 3 (Example: three), at least two of which are spaced apart along the discharge direction on the bottom surface 1311, such as... Figure 1 and Figure 3As shown, the cross-section of any overflow weir wall 132 (this cross-section is a cross-section perpendicular to the length direction of the overflow weir wall 132) is triangular, and the rear side in the discharge direction is preferably perpendicular to the bottom surface 1311 of the feeding hopper 131, and the front side in the discharge direction is preferably at an acute angle to the bottom surface 1311 of the feeding hopper 131 (the specific angle is not described or limited, but is 60° for example), and as... Figure 2 As shown, the height of any overflow weir 132 gradually decreases from the middle to both sides along its length, that is, it is high in the middle and low on both sides. Figure 2 The middle position of any overflow weir 132 (located on both sides) corresponds to the outlet 113 of the feed pipe 11. Because the sludge to be dewatered, mixed with flocculant, rushes towards the middle position of the overflow weir 132 after exiting the outlet 113, the flow rate is highest in the middle, and the material accumulation speed is fastest. To prevent excessively rapid overflow in the middle, the overflow weir 132 in this application is designed to slope downwards from the middle position to both sides, meaning the middle position is the highest, and the height gradually decreases on both sides. This causes the rapidly accumulating sludge in the middle to be diverted to both sides. Preferably, in this embodiment of the invention, viewed along the sludge flow direction, any overflow weir 132 is triangular in shape (e.g., ...). Figure 4 (as shown) or isosceles trapezoidal shape (such as) Figure 2 As shown, the height of the middle position is 1 / 3 to 1 / 2 higher than the height of the two sides (the lowest positions). This design allows for better sludge distribution on the bottom surface 1311 of the distribution hopper 131. The height of the overflow weir 132 also varies along the discharge direction, specifically decreasing gradually. That is, the overflow weir 132 at the rear end of the discharge direction, i.e., the discharge port 113 away from the inlet pipe 11, is lower than the overflow weir 132 near the discharge port 113 of the inlet pipe 11, for example, by 1 / 3 to 1 / 2. This means that the difference between the middle position and the two lowest positions of the overflow weir 132 is 1 / 3 to 1 / 2, meaning the two sides are symmetrical. This design further enhances the sludge distribution on the bottom surface 1311 of the distribution hopper 131. In summary, this design ensures that the sludge flow rate and the distribution are uniform and cover the entire width of the distribution hopper 131.

[0031] In a further preferred embodiment, to prevent uneven distribution of sludge falling onto the filter cloth 20, this embodiment of the invention also includes a sludge adjusting weir 133 at the discharge end of the sludge hopper 131. The sludge adjusting weir 133 adjusts the discharge by gravity, ensuring uniform distribution of sludge falling onto the filter cloth 20. Specifically, the upper end of the sludge adjusting weir 133 is connected by a horizontally arranged rotating shaft (not shown, e.g., ...). Figure 1 The fabric regulating gate 133 (shown in the front-to-back direction) is rotatably connected to the two sides 1312 of the fabric hopper 131. It includes a flat plate that forms an angle with the bottom surface 1311 of the fabric hopper 131. Figure 1The example shown is an acute angle (e.g., 60°) inclined arrangement of the main body 1331 and a part located at the bottom of the main body 1331 at an angle to the main body 1331. Figure 1 The example is a flat extension 1332 (90°, i.e., perpendicular to each other), and the connection between the main body 1331 and the extension 1332 is arc-shaped to form an arc transition portion 1333. The fabric adjusting weir 133 slides in contact with the bottom surface 1311 of the fabric hopper 131 through the arc transition portion 1333. Furthermore, at both ends of the axial direction of the rotating shaft, there is a horizontally outward-facing... Figure 1 The counterweight rod 134 shown extends to the left, and each counterweight rod 134 has a movable counterweight block 135. Exemplarily, the counterweight block 135 passes through the counterweight rod 134 and has a fastening screw (not shown). Rotating the fastening screw causes it to abut against the counterweight rod 134, thus fixing the position of the counterweight block 135; or rotating the fastening screw removes it from the counterweight rod 134, allowing the counterweight block 135 to move freely on the counterweight rod 134. Exemplarily, the counterweight block 135 has a transverse through-hole (not shown) for the counterweight rod 134 to pass through, and on the top and / or bottom surfaces of the counterweight block 135... Figure 1 A threaded hole (not shown) is made through the top surface of the counterweight rod 134 for fastening screws. When the counterweight rod 134 is balanced, the inner end of the fastening screw presses against the counterweight rod 134 to lock the counterweight block 135 onto the counterweight rod 134, preventing the counterweight block 135 from moving arbitrarily and affecting the balance, which in turn affects the opening of the cloth regulating weir 133, and consequently the uniformity of sludge distribution. When the sludge flow rate is low, the sludge's own weight pushes open the cloth regulating weir 133 to a smaller opening; when the sludge flow rate is high, the sludge's own weight pushes open the cloth regulating weir 133 to a larger opening. Therefore, by adjusting the position of the counterweight block 135 on the counterweight rod 134, the opening of the cloth regulating weir 133 can be automatically adjusted according to the sludge flow rate, allowing the sludge to fall onto the filter cloth 20 of the gravity dewatering section with uniform thickness and a set width, providing favorable conditions for improving the sludge dewatering effect. It should be noted that in this embodiment of the present invention, a sludge distribution amount can be preset to adjust the predetermined position of the counterweight block 135 on the counterweight rod 134 (specifically, the counterweight block 135 moves to the right, the greater the weight of the distribution regulating weir 133, the smaller the opening of the distribution regulating weir 133 under the same flow of sludge, and vice versa). The counterweight block 135 is then fixed. At this time, no matter how much sludge flow is at the outlet 113, the sludge distribution amount is fixed after passing through the overflow weir wall 132 of the distribution hopper 131 and the distribution regulating weir 133, that is, the opening of the distribution regulating weir 133 is almost unchanged, thereby ensuring that the sludge is evenly distributed onto the filter cloth 20.

[0032] In summary, the feeding device of this utility model embodiment, by setting multiple overflow weirs 132 on the bottom surface 1311 of the feeding hopper 131 and rationally designing the structure of the overflow weirs 132 (higher in the middle, lower on both sides, with the middle being 1 / 3-1 / 2 higher than the sides and the height gradually decreasing along the discharge direction), can ensure the flow rate of sludge and the uniformity of the feeding, covering the entire width of the feeding hopper 131. Furthermore, by adding a feeding adjustment weir gate 133, a counterweight rod 134, and a counterweight block 135, the uniform distribution of sludge falling onto the filter cloth 20 can be further ensured. No additional slide rails or lifting mechanisms are required, resulting in a simple structure and strong practicality.

[0033] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within its protection scope. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A feeding and feeding device for a belt dewatering machine, wherein the belt dewatering machine includes a frame, characterized in that, The feeding and spreading device is disposed on the outer surface of one end of the frame and includes: The feed pipe has a feed inlet, a discharge outlet, and a dosing inlet; A mixer is disposed inside the feed pipe; A feeding mechanism is located outside the discharge port and includes a feeding hopper having a bottom surface and two opposite sides, and at least two overflow weirs spaced apart on the bottom surface of the feeding hopper along the sludge flow direction. The width of the feeding hopper gradually increases along the sludge flow direction, and the length direction of any overflow weir is perpendicular to any side surface, and the height of the overflow weir gradually decreases from the middle to both sides along its length direction.

2. The feeding and distributing device according to claim 1, characterized in that, The fabric feeding mechanism also includes an openable and closable fabric feeding adjustment gate located at the outlet of the fabric hopper. The top end of the fabric feeding adjustment gate is rotatably connected to the two sides of the outlet of the fabric hopper, and the bottom end slides in contact with the bottom surface.

3. The feeding and distributing device according to claim 2, characterized in that, The fabric adjusting weir gate includes a main body and an extension located at the bottom end of the main body and forming an angle with the main body. The extension and the main body are connected by an arc to form an arc transition section. The fabric adjusting weir gate slides in contact with the bottom surface through the arc transition section.

4. The feeding and distributing device according to claim 2, characterized in that, The top of the fabric regulating weir gate is rotatably connected to the two sides of the fabric hopper via a rotating shaft. The two ends of the rotating shaft extend beyond the two sides and are respectively connected to a counterweight rod. A movable counterweight block is provided on each of the counterweight rods.

5. The feeding and distributing device according to claim 4, characterized in that, The counterweight has a transverse through hole through which the counterweight rod passes, and its top and / or bottom surfaces have threaded holes extending to the through hole. A fastening screw is threaded into the threaded hole, and the inner end of the fastening screw is adapted to press against the outer surface of the counterweight rod when the counterweight moves to a predetermined position to lock the counterweight on the counterweight rod.

6. The feeding and distributing device according to claim 1, characterized in that, The height of the middle position of any of the overflow weir walls is 1 / 3 to 1 / 2 higher than the height of the lowest positions on both sides.

7. The feeding and distributing device according to claim 1, characterized in that, Along the sludge flow direction, the height of the rear overflow weir wall in any two adjacent overflow weir walls is 1 / 3 to 1 / 2 lower than the height of the front overflow weir wall.

8. The feeding and distributing device according to claim 1, characterized in that, The width of the outlet end of the cloth hopper is 2 / 3 of the width of the filter cloth of the belt dewatering machine.

9. The feeding and distributing device according to claim 1, characterized in that, The feed inlet is located on the bottom end face of the feed pipe, and the dosing port is located on the side wall face of the lower end of the feed pipe.

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