Sludge feeding device for sludge dewatering equipment and sludge dewatering system

Abstract

The utility model relates to the field of sludge dewatering, and discloses a sludge feeding device for sludge dewatering equipment and a sludge dewatering system. The sludge feeding device comprises a vertical pump body and a backflow device, the vertical pump body is arranged at the top of the sludge tank, the feeding end is connected with a liquid feeding pipeline, and the discharging end is connected with a liquid discharging pipeline; the reflux device comprises a reflux pipeline and a reflux valve, the first end of the reflux pipeline is communicated with the liquid outlet pipeline, and the second end is communicated with the sludge tank. The sludge dewatering system comprises a sludge tank, sludge dewatering equipment and a sludge feeding device. According to the sludge feeding device provided by the utility model, the vertical pump body conveys sludge from bottom to top in a pipeline form, additional sludge can flow back into the sludge tank to meet the conveying requirement of the sludge, the vertical pump body can be directly arranged at the top of the sludge tank, a pump room does not need to be arranged, the investment cost is reduced, and the vertical pump body can be exposed or covered by a simple shell; during overhaul and maintenance, workers can directly operate, the maintenance process is relatively simple, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of sludge dewatering, in particular to a sludge feeding device for sludge dewatering equipment and a sludge dewatering system. Background Art

[0002] With the progress of society, environmental protection has been deeply rooted in people's hearts. The amount of sewage treatment is increasing, and the amount of sludge generated in the sewage treatment process is also increasing. At present, the amount of sludge generated by sewage treatment every year reaches more than 50 million tons. If the sludge is not properly managed, it will cause secondary pollution.

[0003] The most important link in sludge treatment and disposal is volume reduction, which accounts for the largest investment proportion and the highest operating cost. At present, the sludge is mainly dehydrated to 70-80% moisture content through mechanical equipment such as centrifuges and plate and frame filters. Then the sludge enters the thermal drying device, and the moisture content is reduced to about 30%. In this way, the volume is 60-70% less than that of mechanical dehydration. The current centrifuge or plate and frame filter press usually uses a horizontal screw pump or a slurry pump for feeding. This feeding method requires the establishment of a pump room, which increases investment. At the same time, maintenance requires going down to the bottom of the pump room, which is relatively difficult to maintain. Utility Model Content

[0004] In order to solve the above technical problem or at least partially solve the above technical problem, the utility model provides a sludge feeding device and a sludge dewatering system for sludge dewatering equipment.

[0005] The utility model provides a sludge feeding device for sludge dewatering equipment, comprising:

[0006] A vertical pump body is used to be arranged on the top of the sludge tank, the feed end of the vertical pump body is connected to a liquid inlet pipe, the discharge end of the vertical pump body is connected to a liquid outlet pipe, the liquid inlet pipe extends into the sludge tank, the liquid outlet pipe is used to be connected to the sludge inlet of the sludge dewatering equipment located above the sludge tank, and the vertical pump body can transport sludge from bottom to top;

[0007] The reflux device includes a reflux pipe and a reflux valve arranged on the reflux pipe, the reflux pipe has a corresponding first end and a second end, the first end of the reflux pipe is connected to the liquid outlet pipe, the second end of the reflux pipe is connected to the sludge tank, and the reflux valve is used to control the opening and closing of the reflux pipe.

[0008] Optionally, the vertical pump body is provided with a splash-proof device, which includes a splash-proof plate arranged above the vertical pump body and a collecting plate arranged below the vertical pump body, and the collecting plate is connected to the sludge pool through a liquid leakage pipe.

[0009] Optionally, the splash plate and the collecting plate are both arc-shaped plates, and the concave side of the arc-shaped plate faces the vertical pump body.

[0010] Optionally, the mud feeding device further comprises a flushing component, and the flushing component is used to flush the liquid outlet pipe and the return pipe.

[0011] Optionally, the flushing assembly includes a first flushing pipe connected to the liquid outlet pipe, and the first flushing pipe is provided with a first flushing valve for controlling the opening and closing of the first flushing pipe.

[0012] Optionally, the flushing assembly further includes a second flushing pipe connected to the return pipe, and the second flushing pipe is provided with a second flushing valve for controlling the on-off of the second flushing pipe.

[0013] Optionally, the sludge feeding device further comprises a sludge stirring assembly, wherein the sludge stirring assembly comprises an agitator, and the agitator is inserted into the interior of the sludge tank for stirring the sludge in the sludge tank.

[0014] Optionally, the sludge stirring assembly further comprises a liquid level meter disposed in the sludge tank, the liquid level meter being used to detect the height of the sludge in the sludge tank, and the agitator is configured to start stirring the sludge when the liquid level meter detects that the sludge in the sludge tank reaches a preset height.

[0015] Optionally, there are multiple vertical pump bodies, and the discharge end of each vertical pump body is provided with the liquid outlet pipe, the liquid outlet ends of the multiple liquid outlet pipes are connected to the liquid inlet end of the confluence pipe, and the liquid outlet end of the confluence pipe is connected to the sludge inlet of the sludge dewatering equipment.

[0016] The utility model also provides a sludge dewatering system, comprising:

[0017] Sludge tank, used to store sludge;

[0018] Sludge dewatering equipment, arranged above the sludge pool;

[0019] The sludge feeding device for the sludge dewatering equipment as described in any one of the above items is arranged above the sludge tank and is used to transport the sludge in the sludge tank to the sludge dewatering equipment.

[0020] Compared with the prior art, the technical solution provided by the present invention has the following advantages:

[0021] In the sludge feeding device provided by the utility model, the vertical pump body transports the sludge from bottom to top in the form of a pipeline, and the extra sludge can be returned to the sludge pool through the return pipeline to meet the sludge transportation demand. The vertical pump body can be directly arranged on the top of the sludge pool, without setting up a pump room, thereby reducing the investment cost, and the vertical pump body can be exposed to the outside or covered by a simple shell. During inspection and maintenance, the staff can directly operate it, the maintenance process is relatively simple, and the work efficiency is increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present utility model, and together with the description, are used to explain the principles of the present utility model.

[0023] In order to more clearly illustrate the implementation mode of the utility model or the technical solution in the prior art, the drawings required for use in the implementation mode or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 It is a schematic structural diagram of a sludge feeding device and a sludge dewatering system for sludge dewatering equipment according to an embodiment of the utility model.

[0025] Description of Reference Numerals

[0026] 1. Vertical pump body; 11. Liquid inlet pipe; 12. Liquid outlet pipe; 121. First control valve; 13. Converging pipe; 131. Second control valve; 2. Sludge tank; 3. Reflux device; 31. Reflux pipe; 32. Reflux valve; 4. Splash-proof device; 41. Splash-proof plate; 42. Collecting plate; 43. Leakage pipe; 5. Flushing assembly; 51. First flushing pipe; 52. First flushing valve; 53. Second flushing pipe; 54. Second flushing valve; 6. Sludge stirring assembly; 61. Agitator; 62. Liquid level meter; 7. Electronic control system. DETAILED DESCRIPTION

[0027] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the scheme of the utility model will be further described below. It should be noted that the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

[0028] The following description sets forth many specific details to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; obviously, the implementation methods in the specification are only part of the implementation methods of the present invention, rather than all of the implementation methods.

[0029] like Figure 1As shown, the mud inlet device for the sludge dewatering equipment provided by the embodiment of the utility model includes a vertical pump body 1 and a reflux device 3.

[0030] The vertical pump body 1 is used to be set on the top of the sludge tank 2, wherein the vertical pump body 1 can be a vertical screw pump or a slurry pump, etc. The installation method of the vertical pump body 1 is not limited. For example, the vertical pump body 1 can be installed on the top of the sludge tank 2 by using a channel steel installation method. The channel steel is connected to the bracket on the top of the sludge tank 2 by bolts, and the bolts and nuts used for connection are made of galvanized material. The bottom of the liquid inlet pipe 11 of the vertical pump body 1 is welded and fixed to the bottom of the sludge tank 2 through a bracket, and anti-corrosion is performed after fixing to increase the service life of the overall structure of the vertical pump body 1. In addition, a gap of 100-300mm is left between the inlet of the liquid inlet pipe 11 and the bottom of the sludge tank 2 to ensure the suction effect of the sludge. According to the nature of the sludge, the screw pump or slurry pump seal adopts a packing seal or a mechanical seal, and its rotation speed is lower than 1000r / min.

[0031] The feed end of the vertical pump body 1 is connected to a liquid inlet pipe 11, and the discharge end of the vertical pump body 1 is connected to a liquid outlet pipe 12. The liquid inlet pipe 11 extends into the sludge tank 2, specifically to the bottom of the sludge tank 2, so that the sludge in the sludge tank 2 can be conveniently transported into the liquid inlet pipe 11. The liquid outlet pipe 12 is used to connect to the sludge inlet of the sludge dewatering equipment above the sludge tank 2. The vertical pump body 1 can transport the sludge from bottom to top, so that the sludge in the sludge tank 2 can be transported from bottom to top to the sludge dewatering equipment. In order to facilitate the control of the sludge transport volume, a first control valve 121 can be set on the liquid outlet pipe 12, so that the first control valve 121 can be used to control the opening and closing of the liquid outlet pipe 12. In particular, the first control valve 121 is electrically connected to the electronic control system 7, so that the staff can control the opening and closing state of the first control valve 121.

[0032] The reflux device 3 includes a reflux pipe 31 and a reflux valve 32 disposed on the reflux pipe 31. The reflux pipe 31 has a first end and a second end corresponding to each other. The first end of the reflux pipe 31 is connected to the liquid outlet pipe 12, and the second end of the reflux pipe 31 is connected to the sludge tank 2. The reflux valve 32 is used to control the on-off of the reflux pipe 31. This design can realize the on-off control of the reflux pipe 31 by controlling the opening or closing of the reflux valve 32. When the sludge inlet demand of the sludge dewatering equipment is reduced, the reflux valve 32 can be opened to allow part of the sludge transported by the liquid outlet pipe 12 to flow back to the sludge tank 2 through the reflux pipe 31, so as to reduce the amount of sludge transported to the sludge dewatering equipment and meet the sludge transport demand.

[0033] In the mud feeding device provided by the utility model, the vertical pump body 1 transports the sludge from bottom to top in the form of a pipeline, and the extra sludge can be returned to the sludge pool 2 through the return pipe 31 to meet the sludge transportation demand. The vertical pump body 1 can be directly arranged on the top of the sludge pool 2, without setting up a pump room, thereby reducing the investment cost, and the vertical pump body 1 can be exposed to the outside or covered by a simple shell. During inspection and maintenance, the staff can directly operate, the maintenance process is relatively simple, and the work efficiency is increased.

[0034] like Figure 1 As shown, the vertical pump body 1 is provided with a splash-proof device 4, which includes a splash-proof plate 41 disposed above the vertical pump body 1 and a collecting plate 42 disposed below the vertical pump body 1, and the collecting plate 42 is connected to the sludge pool 2 through a leakage pipe 43. In this design, the slurry exposed at the sealing part of the vertical pump body 1 can be blocked by the splash-proof plate 41 to prevent the slurry from flowing out and polluting the environment, and the blocked slurry flows downward under the action of gravity and is then collected by the collecting plate 42. The slurry collected by the collecting plate 42 flows back to the sludge pool 2 through the leakage pipe 43 to reduce environmental pollution.

[0035] As a feasible implementation, the splash plate 41 and the collecting plate 42 are both arc-shaped plates, and the concave side of the arc-shaped plate faces the vertical pump body 1, wherein the splash plate 41 and the collecting plate 42 can be connected to the liquid outlet pipe 12 by bolts and nuts, and the positions of the splash plate 41 and the collecting plate 42 along the axial direction of the liquid outlet pipe 12 can be adjusted, and the edges of the splash plate 41 and the collecting plate 42 extend 500-1000mm relative to the liquid outlet pipe 12. Under this design, the splash plate 41 adopts the design of an arc plate to increase the blocking range of the splash plate 41 and increase the splash-proof effect of the splash plate 41. The collecting plate 42 adopts the design of an arc plate to increase the collection range of the collecting plate 42, prevent the falling slurry from escaping from the collecting plate 42, and thereby ensure the collection effect of the collecting plate 42. It is understandable that the splash plate 41 and the collecting plate 42 can also adopt a square umbrella structure.

[0036] Further optimized, the opening diameter of the collecting plate 42 is larger than the opening diameter of the splash plate 41, so that the slurry blocked by the splash plate 41 can all flow into the collecting plate 42, avoiding the slurry from escaping from the collecting plate 42 and causing environmental pollution.

[0037] The mud feeding device of the present application also includes a flushing component 5, which is used to flush the liquid outlet pipe 12 and the return pipe 31 to prevent the liquid outlet pipe 12 and the return pipe 31 from being blocked due to residual sludge when the surface is not in use, thereby ensuring the service life of the mud feeding device.

[0038] In some embodiments, the flushing assembly 5 includes a first flushing pipe 51 connected to the liquid outlet pipe 12, and a first flushing valve 52 for controlling the on and off of the first flushing pipe 51 is provided on the first flushing pipe 51. Specifically, the inlet end of the first flushing pipe 51 is connected to a water supply device. When the liquid outlet pipe 12 needs to be flushed, the first flushing valve 52 and the water supply device can be opened to allow the cleaning water to flow into the liquid outlet pipe 12, and then flow out through the outlet of the liquid outlet pipe 12 or the inlet of the liquid inlet pipe 11, so as to realize the flushing of the liquid outlet pipe 12 and the liquid inlet pipe 11. Among them, the first flushing valve 52 can be electrically connected to the electronic control system 7 to facilitate the control of the first flushing valve 52.

[0039] In some embodiments, the flushing assembly 5 further includes a second flushing pipe 53 in communication with the return pipe 31, and a second flushing valve 54 is provided on the second flushing pipe 53 for controlling the on and off of the second flushing pipe 53. Specifically, the inlet end of the second flushing pipe 53 is connected to a water supply device. When the return pipe 31 needs to be flushed, the second flushing valve 54 and the water supply device can be opened to allow the cleaning water to flow into the return pipe 31, and then flow to the sludge tank 2 through the outlet of the return pipe 31, so as to realize the flushing of the return pipe 31. Among them, the second flushing valve 54 can be electrically connected to the electronic control system 7 to facilitate the control of the second flushing valve 54.

[0040] The sludge feeding device also includes a sludge stirring assembly 6, which is used to stir the sludge in the sludge tank 2. Specifically, the sludge stirring assembly 6 includes an agitator 61, which is inserted into the interior of the sludge tank 2 and is used to stir the sludge in the sludge tank 2. Preferably, the agitator 61 is installed in the middle of the tank to ensure the stirring effect of the sludge. Preferably, the agitator 61 can be a double-layer agitator 61 to further ensure the stirring effect of the sludge. Among them, the double-layer agitator 61 can be made of steel lining rubber, 304, 316, 2205 materials according to the water quality properties, with a rotation speed of 60-120r / min, and a paddle type, with two layers of paddles, staggered arrangement, the upper layer is arranged in the center of the sludge tank 2, and the lower layer is 100-300mm from the bottom of the sludge tank 2, and the electrical load per cubic meter is 50-100w.

[0041] The sludge stirring assembly 6 also includes a liquid level gauge 62 disposed in the sludge tank 2. The liquid level gauge 62 is installed at the top of the sludge tank 2. The liquid level gauge 62 can be installed on the sludge tank 2 through a flange structure to ensure the fixing effect of the liquid level gauge 62. The liquid level gauge 62 is used to detect the height of the sludge in the sludge tank 2. The agitator 61 is configured to start stirring the sludge when the liquid level gauge 62 detects that the sludge in the sludge tank 2 reaches a preset height. The preset height here can be a sludge accumulation height of 150 mm, that is, when the liquid level of the sludge entering the sludge tank 2 reaches more than 150 mm displayed by the liquid level gauge 62, the agitator 61 starts to operate to ensure that the agitator 61 can stir the sludge, avoid idling of the agitator 61, and save electricity.

[0042] The linkage between the agitator 61 and the liquid level meter 62 can be realized through the electronic control system 7, and this linkage is a conventional technology for those skilled in the art, and will not be described in detail here.

[0043] like Figure 1 As shown, there are multiple vertical pump bodies 1, and each vertical pump body 1 is provided with a liquid outlet pipe 12 at the discharge end. The liquid outlet ends of the multiple liquid outlet pipes 12 are connected to the liquid inlet end of the confluence pipe 13, and the liquid outlet end of the confluence pipe 13 is connected to the sludge inlet of the sludge dewatering equipment, so that the sludge transported by the multiple vertical pump bodies 1 converges in the confluence pipe 13 and flows to the sludge dewatering equipment together. Under this design, the sludge transportation efficiency can be increased by setting up multiple vertical pump bodies 1, and the multiple vertical pump bodies 1 can also serve as backup for each other. When one of the vertical pump bodies 1 fails, the sludge can be transported through other pump bodies to avoid affecting the transportation of the sludge. Further optimized, a second control valve 131 can be set on the confluence pipe 13 to control the on-off of the overall sludge through the second control valve 131.

[0044] like Figure 1 As shown, the utility model also provides a sludge dewatering system, including a sludge pool 2, sludge dewatering equipment and a sludge inlet device for the sludge dewatering equipment as described in any one of the above items.

[0045] Among them, the sludge tank 2 is used to store sludge. The sludge dewatering equipment is arranged above the sludge tank 2. For example, the sludge tank 2 can be arranged on the first floor, the sludge dewatering equipment can be arranged on the second floor, and the sludge inlet device for the sludge dewatering equipment can be arranged above the sludge tank 2 to transport the sludge in the sludge tank 2 to the sludge dewatering equipment. That is, the sludge inlet device for the sludge dewatering equipment is also arranged on the first floor. When the sludge inlet device for the sludge dewatering equipment fails, the staff can directly repair the sludge inlet device for the sludge dewatering equipment on the first floor, thereby reducing the maintenance cost.

[0046] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0047] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments described herein, but should conform to the widest scope consistent with the principles and novel features of the present invention.

Claims

1. A sludge feeding device for sludge dewatering equipment, characterized in that: include: A vertical pump body (1) is arranged on the top of a sludge tank (2); the feed end of the vertical pump body (1) is connected to a liquid inlet pipe (11); the discharge end of the vertical pump body (1) is connected to a liquid outlet pipe (12); the liquid inlet pipe (11) extends into the sludge tank (2); the liquid outlet pipe (12) is connected to a sludge inlet of a sludge dewatering device located above the sludge tank (2); the vertical pump body (1) is capable of transporting sludge from bottom to top; A reflux device (3) comprises a reflux pipe (31) and a reflux valve (32) arranged on the reflux pipe (31); the reflux pipe (31) has a corresponding first end and a second end; the first end of the reflux pipe (31) is connected to the liquid outlet pipe (12); the second end of the reflux pipe (31) is connected to the sludge tank (2); and the reflux valve (32) is used to control the opening and closing of the reflux pipe (31).

2. The sludge feeding device for sludge dewatering equipment according to claim 1, characterized in that: The vertical pump body (1) is provided with a splash-proof device (4), the splash-proof device (4) comprising a splash-proof plate (41) arranged above the vertical pump body (1) and a collecting plate (42) arranged below the vertical pump body (1), the collecting plate (42) being connected to the sludge pool (2) via a liquid leakage pipe (43).

3. The sludge feeding device for sludge dewatering equipment according to claim 2, characterized in that: The splash plate (41) and the collecting plate (42) are both arc-shaped plates, with the concave side of the arc-shaped plates facing the vertical pump body (1).

4. The sludge feeding device for sludge dewatering equipment according to claim 1, characterized in that: The mud feeding device further comprises a flushing assembly (5), and the flushing assembly (5) is used to flush the liquid outlet pipe (12) and the return pipe (31).

5. The sludge feeding device for sludge dewatering equipment according to claim 4, characterized in that: The flushing assembly (5) comprises a first flushing pipeline (51) connected to the liquid outlet pipeline (12), and the first flushing pipeline (51) is provided with a first flushing valve (52) for controlling the opening and closing of the first flushing pipeline (51).

6. The sludge feeding device for sludge dewatering equipment according to claim 4, characterized in that: The flushing assembly (5) further comprises a second flushing pipeline (53) in communication with the return pipeline (31), and the second flushing pipeline (53) is provided with a second flushing valve (54) for controlling the opening and closing of the second flushing pipeline (53).

7. The sludge feeding device for sludge dewatering equipment according to claim 1, characterized in that: The sludge feeding device further comprises a sludge stirring assembly (6), wherein the sludge stirring assembly (6) comprises an agitator (61), and the agitator (61) is inserted into the interior of the sludge tank (2) and is used to stir the sludge in the sludge tank (2).

8. The sludge feeding device for sludge dewatering equipment according to claim 7, characterized in that: The sludge stirring assembly (6) further comprises a liquid level meter (62) arranged in the sludge pool (2), wherein the liquid level meter (62) is used to detect the height of the sludge in the sludge pool (2), and the stirrer (61) is configured to start stirring the sludge when the liquid level meter (62) detects that the sludge in the sludge pool (2) reaches a preset height.

9. The sludge feeding device for sludge dewatering equipment according to claim 1, characterized in that: There are a plurality of vertical pump bodies (1), and the discharge end of each vertical pump body (1) is provided with the liquid outlet pipe (12). The liquid outlet ends of the plurality of liquid outlet pipes (12) are connected to the liquid inlet end of the confluence pipe (13), and the liquid outlet end of the confluence pipe (13) is connected to the sludge inlet of the sludge dewatering equipment.

10. A sludge dewatering system, characterized in that: include: A sludge tank (2) for storing sludge; A sludge dewatering device is arranged above the sludge pool (2); The sludge feeding device for the sludge dewatering equipment according to any one of claims 1 to 9 is arranged above the sludge tank (2) and is used to transport the sludge in the sludge tank (2) to the sludge dewatering equipment.

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