Sludge unloading bin equipment and use method of sludge unloading bin equipment

Abstract

The invention provides sludge discharging bin equipment and a using method of the sludge discharging bin equipment. The sludge discharging bin equipment comprises a discharging bin body. The spiral conveyor is arranged in the unloading bin body and comprises a conveying shaft; the feeder is arranged in the discharging bin body and comprises a main shaft rotationally connected with the discharging bin body and a deflector rod fixed to the main shaft, the axial direction of the main shaft is parallel to the axial direction of the conveying shaft, the feeder is arranged on the outer side of the upper portion of the spiral conveyor, and the deflector rod is fixed to the main shaft. The sludge unloading bin equipment can effectively prevent sludge from being accumulated in the material bin body.

Description

Technical Field

[0001] The present invention belongs to the technical field of sludge collaborative disposal, and in particular relates to sludge unloading bin equipment and a method for using the sludge unloading bin equipment. Background Art

[0002] With the continuous acceleration of urbanization in my country, the amount of urban sewage and sludge produced has increased year by year, and the amount of domestic sludge generated has also increased accordingly. If domestic sludge is not handled properly, it not only consumes a large amount of land resources, but also poses potential hazards to soil, groundwater, and human safety. Effectively disposing of domestic sludge in a harmless and resource-based manner to address the environmental pollution risks of sludge has always been a key research focus in the industry.

[0003] Currently, municipal wastewater treatment plants typically produce wet sludge with an 80% moisture content or semi-dry sludge with a 60% moisture content. During the unloading process, semi-dry sludge (with a moisture content of approximately 60%) from the waterworks is compressed and compacted in the sludge storage silos after being unloaded by sludge transfer trucks. This can significantly reduce the effective utilization of the sludge storage silos over time. Furthermore, the long-term accumulation of sludge in these dead zones can ferment and produce toxic gases, posing a health risk to personnel.

[0004] Therefore, it is necessary to develop a sludge unloading bin device and a method for using the sludge unloading bin device to reduce the accumulation of semi-dry sludge. Summary of the Invention

[0005] In order to solve some or all of the above technical problems existing in the prior art, the present invention provides a sludge unloading silo device and a method for using the sludge unloading silo device. The sludge unloading silo device can effectively prevent sludge from accumulating in the material silo body.

[0006] According to one aspect of the present invention, there is provided a sludge unloading silo device, comprising:

[0007] Unloading bin body,

[0008] A screw conveyor is provided in the unloading bin body, wherein the conveying shaft of the screw conveyor extends along a first direction.

[0009] A feeder is arranged in the discharge bin body, and the feeder includes a main shaft rotatably connected to the discharge bin body and a shift rod fixed on the main shaft. The axial direction of the main shaft is parallel to the axial direction of the conveying shaft, and the feeder is arranged above and outside the screw conveyor.

[0010] In one embodiment, the shift rod is constructed in a U-shape and includes two first sides arranged opposite to each other and a second side connected between the two first sides, one end of the first side is fixed to the main shaft, and the second side extends along the axial direction of the main shaft and is spaced from the main shaft.

[0011] In one embodiment, a wedge-shaped structure is protrudingly provided on the mud-facing surface of the second side.

[0012] In one embodiment, two groups of the shifting rods are provided on the main shaft, one group includes at least one shifting rod, and the shifting rods of different groups are spaced 180 degrees apart in the circumferential direction of the main shaft and are staggered in the axial direction of the main shaft.

[0013] In one embodiment, in the height direction of the unloading bin body, the side wall of the unloading bin body contains a concrete section, a clearing section and a screw conveyor section connected in sequence from top to bottom, wherein the screw conveyor is arranged in the screw conveyor section, and the feeder is arranged in the clearing section, and the side wall of the clearing section distributed along the axial direction of the main shaft and the connection with the screw conveyor section are constructed in an arc shape that matches the movement trajectory of the shifting rod.

[0014] In one embodiment, polytetrafluoroethylene plates are provided on the inner walls of the clearing section and the screw conveyor section.

[0015] In one embodiment, a material tapper is further provided in the clearing section, and the material tapper includes a rotating shaft and a material tapper tooth provided on the rotating shaft. The rotating shaft is parallel to the main shaft and is located on the inner side of the main shaft. In the horizontal direction, the rotating shaft is located between adjacent conveying shafts.

[0016] In one embodiment, a plurality of groups of the stripping teeth are arranged on the rotating shaft, each group contains a plurality of the stripping teeth spaced apart in the axial direction of the rotating shaft, and a plurality of groups of the stripping teeth are evenly arranged in the circumferential direction of the rotating shaft, each of the stripping teeth is constructed as a trapezoidal frame, and the plane formed by each side of the trapezoidal frame of the stripping teeth is spaced 15-25 degrees from the axial direction of the rotating shaft.

[0017] According to another aspect of the present invention, a method for using a sludge unloading silo device is provided, comprising:

[0018] Step 1: The sludge is poured into the unloading bin.

[0019] Step 2: Start the screw conveyor and monitor the current value of the screw conveyor. If the current value is less than or equal to the first preset value, the material tapper set in the unloading bin body is started, and the current value is equal to or greater than the third preset value after the first timing, the material tapper is closed; if the current value is less than or equal to the second preset value, the feeder is started, and the current value is equal to or greater than the third preset value after the first timing, the feeder is closed.

[0020] The first preset value is 58%-62% of the limited current value, the second preset value is 38%-42% of the limited current value, the third preset value is 68%-72% of the limited current value, and the first timing is 1-2 minutes.

[0021] In one embodiment, in step 2, when the material tapper is in the starting state, the rotating shaft of the material tapper rotates forward 8-15 times and then counterclockwise 1-3 times.

[0022] Compared with the prior art, the advantages of the present invention are: by arranging a feeder in the unloading bin body, the sludge in the unloading bin body can be stirred; since the feeder is arranged on the upper outside of the screw conveyor, the feeder can also assist in moving the sludge to the middle of the unloading bin body, thereby promoting the activation of the material in the unloading bin body and being taken away by the screw conveyor at the bottom, thereby preventing the material from becoming compacted in the unloading bin body. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, in which:

[0024] Figure 1 shows a cross-sectional view of a sludge unloading silo apparatus according to one embodiment of the present invention;

[0025] Figure 2 Shows a feeder of a sludge unloading silo device according to one embodiment of the present invention;

[0026] Figure 3 For those from Figure 2 AA section view;

[0027] Figure 4 The present invention shows a material dispenser of a sludge unloading bin device according to one embodiment of the present invention;

[0028] Figure 5 The figure shows the distribution of the stripping teeth in the stripper of the sludge unloading bin equipment in the circumferential direction of the rotating shaft according to one embodiment of the present invention.

[0029] In the accompanying drawings, like components are given like reference numerals, but the accompanying drawings are not drawn to scale. DETAILED DESCRIPTION

[0030] To make the technical solutions and advantages of the present invention more clearly understood, exemplary embodiments of the present invention are further described in detail below with reference to the accompanying drawings. It should be understood that the described embodiments are only a portion of the embodiments of the present invention, and are not exhaustive. Furthermore, the embodiments and features of the embodiments of the present invention may be combined with each other unless there is a conflict.

[0031] The serial numbers assigned to components herein, such as "first" and "second," are used solely to distinguish the objects being described and do not imply any sequential priority or specific technical meaning. Furthermore, unless otherwise specified, the concepts of "connection" and "coupling" mentioned in this application are considered to include both direct and indirect connections (couplings).

[0032] When interpreting the description of this application, it is important to clarify that the directions or positional relationships indicated by terms such as "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," "clockwise," and "counterclockwise" are based on the perspectives and layouts shown in the accompanying drawings and are intended to facilitate explanation and simplify the description process, rather than to absolutely limit the actual directions, construction methods, and operating modes of devices or components. Therefore, these terms should not be construed as restrictive of the content of this application.

[0033] The embodiment of the present invention provides a sludge unloading silo device. Figures 1 to 5 As shown, the sludge unloading silo equipment includes a unloading silo body 1, a screw conveyor 2 and a feeder 3. Among them, the unloading silo body 1 is in the shape of a silo, mainly used for storing semi-dry sludge, with its upper end opening for receiving sludge and the lower end opening for discharging sludge. The screw conveyor 2 is arranged in the unloading silo body 1, and is mainly used to transport sludge to the entrance of the next-level equipment. The screw conveyor 2 is arranged at the bottom of the unloading silo body 1. In order to ensure the conveying efficiency, the screw conveyor 2 is a multi-tube bottom-laying screw conveyor. The screw conveyor 2 can be a screw conveyor in the prior art. After installation, the conveying shaft 21 of the screw conveyor is Figure 1 The feeder 3 is arranged in the discharge bin body 1. Structurally, the feeder 3 contains a main shaft 31 and a shift rod 32. The main shaft 31 is arranged in the discharge bin body 1 and rotates around its own axial direction relative to the discharge bin body 1. At the same time, the axial direction of the main shaft 31 is parallel to the axial direction of the conveying shaft 21 of the screw conveyor 2, that is, the main shaft 31 is also distributed along the front and back direction. The shift rod 32 is fixedly set on the main shaft 31 and is used to rotate with the main shaft 31, thereby shifting the mud blocks. There are two feeders 3, which are respectively arranged on the upper and outer sides of the screw conveyor 2.

[0034] Therefore, in the sludge unloading bin equipment, by setting the feeder 3, the material fluidity can be improved, and the rotating stirring of the lever 32 can break the bonding state of the sludge, prevent the material from bridging or arching, and ensure continuous and uniform unloading; the double feeders 3 are symmetrically arranged on the outside above the screw conveyor 2 to form a material pre-loosening area, reduce the load resistance of the screw conveyor 2, and improve the conveying stability; the layout design of the main shaft 31 and the conveying shaft 21 of the screw conveyor 2 is parallel to each other, so that the tangential force of the lever 32 and the axial thrust of the conveying shaft 21 complement each other, effectively solving the sludge blockage problem; when running, the two feeders 3 can also assist in shifting the sludge attached to the wall to the middle of the unloading bin body 1, promote the activation of the material in the unloading bin body 1, and be taken away by the screw conveyor 2 on the bottom, to prevent the material from compacting in the bin.

[0035] In one embodiment, Figure 2 As shown, the shift lever 32 is constructed in a U-shape. The shift lever 32 includes two opposing first sides 33 and a second side 34 connected between the two first sides 33. After the first side 33 is secured to the main shaft 31, the second side 34 extends axially along the main shaft 31 and is spaced apart from the main shaft 31. Preferably, two groups of shift levers 32 are provided on the main shaft 31. Each group includes at least one shift lever 32. The shift levers 32 in different groups are spaced 180 degrees apart circumferentially around the main shaft 31 and are staggered in the axial direction of the main shaft 31. For example, the shift lever 32 and the main shaft 31 are secured by welding. Furthermore, the main shaft 31 can be driven by a first motor 35. As can be seen, the hollow space between the shift lever 32 and the main shaft 31 allows the sludge to be turned within the discharge bin body 1 and maximizes the efficiency of the drive motor of the feeder 3 within its limited power. In addition, the two groups of shift rods 32 are arranged at 180 degrees relative to each other, so as to ensure the supporting strength of the shift rods 32 while ensuring relatively large torque output.

[0036] like Figure 3 As shown, a wedge-shaped structure 36 is protruding from the mud-facing surface of the second side 34. As will be readily understood, the second side 34 and the wedge-shaped structure 36 are integrally formed. The wedge-shaped design on both sides of the mud-facing surface of the second side 34 ensures that the feeder 3 can cut through agglomerated sludge, destroying the underlying material structure that supports the sludge and effectively promoting its descent.

[0037] In the height direction of the unloading bin body 1, the side wall of the unloading bin body 1 contains a concrete section 11, a clearing section 12 and a screw conveyor section 13 connected in sequence from top to bottom. The unloading bin body 1 is placed under the ground. It is easy to understand that the concrete section 11 is a reinforced concrete structure laid on the side wall under the ground after digging the stratum. The clearing section 12 and the screw conveyor section 13 are connected to the screw conveyor 2, the feeder 3 and the feeder 4 in a modular arrangement and are placed under the concrete section 11. In addition, the clearing section 12 is connected to the concrete section 11, and together with the screw conveyor section 13, it forms the side wall of the unloading bin body 1. The screw conveyor 2 is arranged in the screw conveyor section 13. The feeder 3 is arranged in the clearing section 12. The clearing section 12 is arranged obliquely, for example, in Figure 1 The angle formed between the middle clearing section 12 and the horizontal is 60-80 degrees, for example 70 degrees, which helps to discharge the sludge smoothly. In addition, the side wall of the clearing section 12 along the axial direction of the main shaft 31 and the connection with the screw conveyor section 13 are constructed in an arc shape to match the movement arc of the shifting rod 32. In other words, Figure 1 In the figure, the left and right sidewalls of the clearing section 12 are provided with curved sections 14, connecting to the screw conveyor section 13. This curved section 14 optimizes the material flow path. In particular, the curved sidewall design of the clearing section 12 matches the motion trajectory of the lever 32, eliminating dead zones in material flow and reducing the risk of sludge accumulation. The curved transition structure allows the lever 32 to fully contact the accumulated material on the silo wall, effectively peeling off adhering sludge through rotational shear force and preventing bridging. The geometric matching design of the clearing section 12 and the screw conveyor section 13 ensures that sludge can smoothly enter the screw conveyor after the lever 32 is loosened, forming a continuous material flow.

[0038] Preferably, a polymer sheet, such as a polytetrafluoroethylene sheet, is installed on the inner walls of the clearing section 12 and the screw conveyor section 13. The polymer sheet can be fixed to the clearing section 12 and the screw conveyor section 13 using pins. This arrangement takes advantage of the polymer sheet's low coefficient of friction, making it difficult for sludge to adhere to the polymer sheet surface and prevent sludge from bridging the silo wall and causing silo blockage.

[0039] A material dispenser 4 is also provided in the clearing section 12. Figure 4 and 5As shown, the feeder 4 includes a rotating shaft 41 and a feeder tooth 42 arranged on the rotating shaft 41. The rotating shaft 41 is parallel to the main shaft 31 and is located on the inner side of the main shaft 31. At the same time, in the horizontal direction, the rotating shaft 41 is located between adjacent conveying shafts 21. Structurally, multiple groups of feeder teeth 42 are provided on the rotating shaft 41. Each group contains multiple feeder teeth 42 spaced apart in the axial direction of the rotating shaft 41. Multiple groups of feeder teeth 42 are evenly arranged in the circumferential direction of the rotating shaft 41. Each feeder tooth 42 is constructed as a trapezoidal frame, and its opening is fixed to the rotating shaft 41. And the plane formed by each side of the trapezoidal frame of the feeder tooth 42 is spaced 15-25 degrees, for example, 20 degrees, from the axial direction of the rotating shaft 41. The rotating shaft 41 is driven by a second motor 43. The trapezoidal frame-shaped feeder teeth 42 are arranged at a 20° angle, ensuring minimal head-on torque while maximizing sludge agitation and effectively breaking up sludge clumps, particularly for fibrous or high-viscosity materials. Multiple axially spaced groups of feeder teeth 42 form a three-dimensional mixing network, eliminating blind spots where material can accumulate between the screw conveyors 2 and improving conveying uniformity. Together with the feeder 3, they create dual-stage mixing, both internally and externally. The uniform circumferential distribution of the feeder teeth 42 simultaneously cleans the feed inlet of the screw conveyor section 13, preventing material blockage.

[0040] The number of the material tappers 4 is related to the number of the conveying shafts 21, and one material tapper 4 is provided between two adjacent conveying shafts 21. Thus, the material tapper 4 can effectively prevent the sludge between the conveying shafts 21 of the screw conveyor 2 from becoming compacted and arched.

[0041] The following is based on Figures 1 to 5 Describe in detail how to use the sludge unloading silo equipment.

[0042] First, pour the sludge into the unloading bin body 1. It should be noted that the sludge unloading bin equipment of the present application is mainly used to process semi-dry sludge with a moisture content of about 60%.

[0043] Then, the screw conveyor 2 is started to convey the sludge to the downstream equipment. At the same time, the current value of the screw conveyor 2 is monitored. Due to the unevenness of the sludge, the current value will change.

[0044] If the monitored current value is less than or equal to the first preset value, the feeder 4 provided in the discharge bin body 1 is started. The sludge in the middle of the discharge bin body 1 is stirred to promote the discharge of the sludge. The first preset value is 58%-62% of the limited current value, for example, 60%. The limited current value is a fixed value that can be measured or calculated, which is 0.65-0.75 times the rated current value. If the limited current value is 20 amps, the first preset value can be 12 amps. For example, the speed of the feeder 4 can be 1 to 2 rpm. During the operation of the feeder 4, the rotating shaft 41 rotates forward 8 to 15 times, for example, 10 times, and then reverses 1 to 3 times, for example, two times. This reversal operation can enable the feeder 4 to clean the feeder teeth 42. It should be noted here that in the present application, after the material tapper 4 is started, the specific rotation direction of the rotating shaft 41 of the material tapper 4 is not limited, that is, the rotation direction of the rotating shaft 41 can be clockwise or counterclockwise. The rotation direction of the rotating shaft 41 at the initial start-up is set to forward. When the current value is equal to or greater than the third preset value, the material tapper 4 is closed after the first timing. The third preset value is 68%-72% of the limited current value, for example, 70%. According to the above, if the limited current value is 20 amps, the third preset value can be 14 amps. The first timing is 1-2 minutes, for example, 1 minute.

[0045] During operation of the screw conveyor 2, if the current value is less than or equal to a second preset value, the feeder 3 is activated. The second preset value is 38%-42% of the current limit, for example, 40%. In one example, when the current limit is 20 amps, the second preset value is 8 amps. The activated feeder 3 rotates toward the center, i.e., the left lever 32 in the feeder 3 rotates counterclockwise, while the right lever 32 rotates clockwise. This rotation helps push the sludge toward the center. The main shaft 31 rotates at a speed equal to or less than 1 rpm, for example, 0.75 rpm, to assist in pushing the material. When the current value is equal to or greater than a third preset value, the feeder 3 is shut off after the first timer. The third preset value is 68%-72% of the current limit, for example, 70%. Based on the above, if the current limit is 20 amps, the third preset value can be 14 amps. The first timer is 1-2 minutes, for example, 1 minute.

[0046] As can be seen from the above description, when the current value is less than or equal to the second preset value, both the feeder 3 and the dialer 4 are in operation. The criteria for stopping the operation of the feeder 3 and the dialer 4 are the same. This setting can help control overall energy consumption.

[0047] It can be seen that the sludge unloading bin equipment and the method for using the sludge unloading bin equipment of the present application can not only solve the problem of difficulty in unloading materials in the unloading bin body 1, but also effectively reduce the problem of sludge transportation blockage.

[0048] Although preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they become aware of the basic inventive concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and / or modifications that fall within the scope of the present invention, and changes and / or modifications made in accordance with the embodiments of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A sludge unloading silo equipment, characterized in that: include: Unloading bin body, A screw conveyor is provided in the body of the unloading bin, wherein the screw conveyor comprises a conveying shaft. A feeder is arranged in the discharge bin body, and the feeder includes a main shaft rotatably connected to the discharge bin body and a shift rod fixed on the main shaft. The axial direction of the main shaft is parallel to the axial direction of the conveying shaft, and the feeder is arranged above and outside the screw conveyor.

2. The sludge unloading silo equipment according to claim 1, characterized in that: The shift lever is constructed in a U-shape and includes two first sides arranged opposite to each other and a second side connected between the two first sides, one end of the first side is fixed to the main shaft, and the second side extends along the axial direction of the main shaft and is spaced from the main shaft.

3. The sludge unloading silo equipment according to claim 2, characterized in that: A wedge-shaped structure is protrudingly provided on the mud-facing surface of the second side.

4. The sludge unloading silo equipment according to claim 2 or 3, characterized in that: Two groups of shift rods are provided on the main shaft, one group includes at least one shift rod, and the shift rods of different groups are spaced 180 degrees apart in the circumferential direction of the main shaft and are staggered in the axial direction of the main shaft.

5. The sludge unloading silo equipment according to any one of claims 1 to 4, characterized in that: In the height direction of the unloading bin body, the side wall of the unloading bin body contains a concrete section, a clearing section and a screw conveyor section connected in sequence from top to bottom, wherein the screw conveyor is arranged in the screw conveyor section, and the feeder is arranged in the clearing section. The side wall of the clearing section distributed along the axial direction of the main shaft and the connection between the screw conveyor section are constructed in an arc shape that matches the movement trajectory of the shifting rod.

6. The sludge unloading silo equipment according to claim 5, characterized in that: Polytetrafluoroethylene plates are provided on the inner walls of the blockage clearing section and the screw conveyor section.

7. The sludge unloading silo equipment according to claim 5 or 6, characterized in that: A material tapper is also provided in the clearing section, and the material tapper includes a rotating shaft and a material tapping tooth provided on the rotating shaft. The rotating shaft is parallel to the main shaft and is located on the inner side of the main shaft. In the horizontal direction, the rotating shaft is located between adjacent conveying shafts.

8. The sludge unloading silo equipment according to claim 7, characterized in that: A plurality of groups of the stripping teeth are arranged on the rotating shaft, each group contains a plurality of the stripping teeth spaced apart in the axial direction of the rotating shaft, and a plurality of groups of the stripping teeth are evenly arranged in the circumferential direction of the rotating shaft, each of the stripping teeth is constructed as a trapezoidal frame, and the plane formed by each side of the trapezoidal frame of the stripping teeth is spaced 15-25 degrees from the axial direction of the rotating shaft.

9. A method for using the sludge unloading silo equipment according to any one of claims 1 to 8, characterized in that: include: Step 1: The sludge is poured into the unloading bin. Step 2: Start the screw conveyor and monitor the current value of the screw conveyor. If the current value is less than or equal to the first preset value, the material tapper set in the unloading bin body is started, and the current value is equal to or greater than the third preset value after the first timing, the material tapper is closed; if the current value is less than or equal to the second preset value, the feeder is started, and the current value is equal to or greater than the third preset value after the first timing, the feeder is closed. The first preset value is 58%-62% of the limited current value, the second preset value is 38%-42% of the limited current value, the third preset value is 68%-72% of the limited current value, and the first timing is 1-2 minutes.

10. The method for using the sludge unloading silo equipment according to claim 9, characterized in that: In the step 2, when the material tapper is in the starting state, the rotating shaft of the material tapper rotates forward 8-15 times and then counterclockwise 1-3 times.

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