Sludge fiber cutting treatment device and sludge dewatering and feeding system

Abstract

The invention relates to a sludge fiber cutting treatment device and a sludge dewatering and feeding system. Wherein the sludge fiber cutting treatment device comprises a sludge filter, a material returning mechanism and a cutting mechanism, the sludge filter is vertically arranged, a cylindrical filter element body and a sludge lifting assembly are arranged in the sludge filter, the cylindrical filter element body is divided into an inner space and an outer space in the sludge filter, and the sludge lifting assembly is arranged in the inner space; a lifting driving motor arranged outside the sludge filter drives the sludge lifting assembly to work, the sludge inlet pipeline is communicated with the inner space of the sludge filter, a sludge pump is arranged in the sludge outlet pipeline and communicated with the outer space of the sludge filter, and the material returning mechanism is arranged on the upper portion of the sludge filter and communicated with the side wall of the sludge filter. The cutting mechanism is arranged below the material returning mechanism and communicated with the material returning mechanism, and the bottom of the cutting mechanism extends out of a backflow pipe to be communicated with the sludge inlet pipeline. The device is good in cutting effect and capable of avoiding blockage of follow-up process equipment.

Description

Technical Field

[0001] The invention relates to the technical field of sludge treatment, in particular to a sludge fiber cutting treatment device and a sludge dewatering and sludge feeding system using the sludge fiber cutting treatment device. Background Art

[0002] In the process of sludge treatment, if the mixed fibers in the sludge are not removed, it is easy to cause the process equipment to be entangled by the fibers and cause blockage, resulting in production interruption. Therefore, in the existing sludge treatment process, a fiber cutter is installed to perform shearing and cutting of the fibers in the sludge. However, the fiber cutter in the existing process is affected by the flow rate, moisture content and fiber type of the sludge during operation, and the actual cutting often fails to achieve the effect required by the production process. In addition, since the sludge passes through the fiber cutter in full, this further increases the wear of the cutting edge and reduces the cutting effect.

[0003] In the subsequent sludge drying process, since chemical agents such as curing agents need to be added to dry the sludge, if the fibers in the sludge do not meet the cutting effect required by the process, the sludge mixed with large volumes of fibers will produce blocky particles after the curing agent is added, which will block the subsequent equipment. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a sludge fiber cutting and processing device which has good cutting effect and can avoid blockage of subsequent process equipment.

[0005] The present invention adopts the following technical solution:

[0006] The present invention provides a sludge fiber cutting and processing device, comprising a sludge filter, a sludge inlet pipe, a sludge outlet pipe, a return mechanism and a cutting mechanism. The sludge filter is vertically set up and is internally provided with a cylindrical filter core and a sludge lifting assembly. The cylindrical filter core separates an inner space and an outer space in the sludge filter. The sludge lifting assembly is arranged in the inner space and can drive the sludge in the inner space to lift upward. A lifting drive motor arranged outside the sludge filter drives the sludge lifting assembly to work. The sludge inlet pipe is connected to the inner space of the sludge filter. A sludge pump is arranged in the sludge outlet pipe and is connected to the outer space of the sludge filter. The return mechanism is arranged at the upper part of the sludge filter, and the return mechanism can drive the sludge to move horizontally and laterally to be connected to the side wall of the sludge filter. The cutting mechanism is arranged below the return mechanism, and the cutting mechanism can horizontally and laterally cut the fiber in the sludge to be connected to the return mechanism. A return pipe extends from the bottom of the cutting mechanism to be connected to the sludge inlet pipe.

[0007] Preferably, the cylindrical filter core is welded together by a plurality of wedge-shaped bars arranged circumferentially at equal intervals, and the filter gap between two adjacent wedge-shaped bars gradually increases from the inner space to the outer space.

[0008] Preferably, the sludge filter includes a filter housing, the internal space of the filter housing is divided into a sludge storage area, a accommodating area and a sludge inlet area from high to low in the height direction, the return mechanism is connected to the sludge storage area, the cylindrical filter core is arranged in the accommodating area, the sludge inlet pipe is connected to the sludge inlet area, and the sludge lifting assembly is connected to the sludge storage area, the accommodating area and the sludge inlet area at the same time.

[0009] Preferably, the sludge lifting assembly includes a lifting screw rod and a connecting shaft. The lifting screw rod is coaxially arranged in the accommodating area with the cylindrical filter element and penetrates into the mud inlet area. The connecting shaft is arranged in the mud storage area and is provided with a stirring impeller on the outer peripheral surface. One end of the connecting shaft is axially connected to the lifting screw rod below, and the other end passes through the mud storage area and is axially connected to the driving shaft of the upper lifting drive motor.

[0010] Preferably, the return material mechanism includes a return material shell, a feeding screw rod and a feeding drive motor. One end of the return material shell in the length direction is connected to the sludge filter and the other end is connected to the cutting mechanism. The feeding screw rod is horizontally arranged in the return material shell. The feeding drive motor is arranged outside the return material shell and is axially connected to the feeding screw rod through a driving shaft.

[0011] Preferably, the feeding screw rod is arranged close to the inner cylinder wall of the return material shell, and a humidifying pipe is connected to the middle position of the return material shell, and the humidifying pipe is connected to the outlet of the sludge pump on the mud outlet pipe.

[0012] Preferably, the cutting mechanism includes a cutting shell, a cutting shaft and a cutting drive motor. One end of the cutting shell in the length direction is connected to the material return mechanism, and the other end is connected to the mud inlet pipe. The cutting shaft is horizontally arranged in the cutting shell, and the cutting shaft is provided with an impeller on the side close to the material return mechanism, and a plurality of cutting blade groups are arranged at intervals in the direction away from the impeller. The cutting drive motor is arranged outside the cutting shell and is axially connected to the cutting shaft through a drive shaft.

[0013] Preferably, the cutting blade group includes a fixed blade and a movable blade. The fixed blade is inserted into the cutting shaft and fixedly connected to the inner cylinder wall of the cutting shell. The fixed blade is provided with a plurality of through holes for the sludge to pass through. The movable blade is mounted on the cutting shaft, and a plurality of movable blades on the movable blade are elastically abutted against one side surface of the fixed blade. Each movable blade can cooperate with the through hole to perform a shearing action during the rotation of the movable blade.

[0014] Preferably, an even number of through holes for the sludge to pass through are circumferentially and evenly spaced on the fixed blade.

[0015] The present invention also provides a sludge dewatering and inlet system, which adopts any of the above sludge fiber cutting and processing devices, wherein the sludge inlet pipeline is connected to the front end gravity pipeline for conveying sludge, and the sludge outlet pipeline is connected to the inlet of the next process equipment.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] When the sludge fiber cutting and processing device of the present invention is in use, the sludge enters the inner space of the sludge filter from the sludge inlet pipe, and the part of the sludge that can enter the outer space through the cylindrical filter core is directly discharged from the sludge outlet pipe under the suction action of the sludge pump, while the sludge that cannot smoothly enter the outer space due to the influence of large-volume fibers is lifted upward by the sludge lifting component and enters the return material mechanism, and is horizontally transported to the cutting mechanism by the return material mechanism. After the cutting mechanism cuts the fibers in the sludge, the cut sludge is re-integrated into the sludge inlet pipe through the reflux pipe, and the sludge enters the sludge filter again, while the sludge that cannot enter the outer space continues to enter the cutting mechanism for fiber cutting until it can be discharged from the sludge outlet pipe.

[0018] Obviously, the sludge fiber cutting and processing device of the present invention can avoid the blockage of subsequent process equipment while ensuring the cutting effect by repeatedly filtering and cutting the sludge.

[0019] The sludge dewatering and sludge feeding system of the present invention adopts the above-mentioned sludge fiber cutting and processing device, thereby eliminating the defects of the original fiber cutting machine of the system and avoiding the blockage of subsequent equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the sludge fiber cutting and processing device in an embodiment of the present invention.

[0021] Figure 2 It is a front view of the sludge fiber cutting and processing device in an embodiment of the present invention.

[0022] Figure 3 It is a schematic diagram of the cross-sectional structure of a sludge filter on a sludge fiber cutting and processing device in an embodiment of the present invention.

[0023] Figure 4 It is a schematic cross-sectional structure diagram of the upper material return mechanism of the sludge fiber cutting and processing device in an embodiment of the present invention.

[0024] Figure 5 It is a schematic diagram of the cross-sectional structure of the cutting mechanism on the sludge fiber cutting and processing device in an embodiment of the present invention.

[0025] Figure 6 It is a schematic structural diagram of the cutting mechanism on the sludge fiber cutting and processing device after the cutting shell is removed in an embodiment of the present invention.

[0026] The reference numerals are described as follows:

[0027] 1. Sludge filter 4. Material return mechanism

[0028] 11. Cylindrical filter element 41. Return material housing

[0029] 12. Sludge lifting assembly 42. Feeding screw rod

[0030] 121, lifting screw rod 43, feeding drive motor

[0031] 122. Connecting shaft 5. Cutting mechanism

[0032] 123, stirring impeller 51, cutting shell

[0033] 13. Lifting drive motor 52, cutting shaft

[0034] 14. Filter housing 53. Cutting drive motor

[0035] 141, mud storage area 54, cutting blade group

[0036] 142, accommodating area 541, fixed blade

[0037] 143, Mud inlet area 542, Moving blade

[0038] 2. Mud inlet pipe 6. Return pipe

[0039] 3. Mud discharge pipe 7. Humidification pipe DETAILED DESCRIPTION

[0040] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. These embodiments are only used to illustrate the present invention, but not to limit the present invention.

[0041] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] Furthermore, in the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0044] See also Figures 1 to 3 The present embodiment provides a sludge fiber cutting and processing device, comprising a sludge filter 1, a sludge inlet pipe 2, a sludge outlet pipe 3, a return mechanism 4 and a cutting mechanism 5. The sludge filter 1 is vertically set up and is provided with a cylindrical filter core 11 and a sludge lifting assembly 12 inside. The cylindrical filter core 11 separates an inner space and an outer space in the sludge filter 1. The sludge lifting assembly 12 is arranged in the inner space and can drive the sludge in the inner space to lift upward. A lifting drive motor 13 arranged outside the sludge filter 1 drives the sludge lifting assembly 12 to work. The sludge inlet pipe 2 is connected to the inner space of the sludge filter 1. A sludge pump is arranged in the sludge outlet pipe 3 and is connected to the outer space of the sludge filter 1. The return mechanism 4 is arranged at the upper part of the sludge filter 1, and the return mechanism 4 can drive the sludge to move horizontally and laterally to communicate with the side wall of the sludge filter 1. The cutting mechanism 5 is arranged below the return mechanism 4, and the cutting mechanism 5 can horizontally and laterally cut the fiber in the sludge and communicate with the return mechanism 4. A return pipe 6 extends from the bottom of the cutting mechanism 5 and communicates with the sludge inlet pipe 2.

[0045] When the sludge fiber cutting and processing device of this embodiment is in use, the sludge enters the inner space of the sludge filter 1 from the sludge inlet pipe 2, and the part of the sludge that can enter the external space through the cylindrical filter core 11 is directly discharged from the sludge outlet pipe 3 under the suction action of the sludge pump, while the sludge that cannot smoothly enter the external space due to the influence of large-volume fibers is lifted upward by the sludge lifting component 12 and enters the return mechanism 4, and is horizontally transported to the cutting mechanism 5 by the return mechanism 4. After the cutting mechanism 5 cuts the fibers in the sludge, the cut sludge is re-integrated into the sludge inlet pipe 2 through the return pipe 6, and the sludge enters the sludge filter 1 again, while the sludge that cannot enter the external space continues to enter the cutting mechanism 5 for fiber cutting until it can be discharged from the sludge outlet pipe 3.

[0046] Obviously, the sludge fiber cutting and processing device of this embodiment can avoid the blockage of subsequent process equipment while ensuring the cutting effect by repeatedly filtering and cutting the sludge.

[0047] Preferably, the cylindrical filter core 11 is welded from a plurality of wedge-shaped bars equidistantly arranged in an annular direction, and the filter gap between two adjacent wedge-shaped bars gradually increases from the inner space to the outer space to prevent sludge with fibers from being blocked in the filter gap.

[0048] Preferably, see Figure 3 The sludge filter 1 includes a filter housing 14, the internal space of the filter housing 14 is divided into a sludge storage area 141, a receiving area 142 and a sludge inlet area 143 from high to low along the height direction, the return mechanism 4 is connected with the sludge storage area 141, the cylindrical filter core body 11 is arranged in the receiving area 142, the sludge inlet pipe 2 is connected with the sludge inlet area 143, and the sludge lifting assembly 12 is connected with the sludge storage area 141, the receiving area 142 and the sludge inlet area 143 at the same time.

[0049] See also Figures 1 to 3 During operation, the sludge first enters the lower sludge inlet area 143 from the sludge inlet pipe 2, and is lifted to the accommodating area 142 by the sludge lifting assembly 12. Part of the sludge flows directly from the inner space of the cylindrical filter element 11 to the outer space, while the remaining sludge that cannot pass through the cylindrical filter element 11 is further lifted to the sludge storage area 141 by the sludge lifting assembly 12, and the sludge in the sludge storage area 141 enters the return mechanism 4 under the extrusion action, and is transported to the cutting mechanism 5 by the return mechanism 4.

[0050] Preferably, see Figure 3 The sludge lifting assembly 12 includes a lifting screw rod 121 and a connecting shaft 122. The lifting screw rod 121 is coaxially arranged in the accommodating area 142 with the cylindrical filter element 11 and penetrates into the mud inlet area 143. The connecting shaft 122 is arranged in the mud storage area 141 and is provided with a stirring impeller 123 on the outer peripheral surface. One end of the connecting shaft 122 is axially connected to the lifting screw rod 121 below, and the other end passes through the mud storage area 141 and is axially connected to the driving shaft of the upper lifting drive motor 13.

[0051] During operation, the lifting drive motor 13 drives the lifting screw rod 121 and the connecting shaft 122 to rotate synchronously, and the sludge in the sludge filter 1 can be gradually lifted upward along the spiral on the lifting screw rod 121, and the sludge entering the sludge storage area 141 will also enter the return mechanism 4 at a faster speed driven by the stirring impeller 123.

[0052] Preferably, in this embodiment, the sludge filter 1 is made entirely of stainless steel.

[0053] Preferably, see Figure 4The return mechanism 4 includes a return housing 41, a feed screw 42 and a feed drive motor 43. One end of the return housing 41 in the length direction is connected to the sludge filter 1, and the other end is connected to the cutting mechanism 5. The feed screw 42 is horizontally arranged in the return housing 41. The feed drive motor 43 is arranged outside the return housing 41 and axially connected to the feed screw 42 through a drive shaft. The return mechanism 4 can drive the feed screw 42 to rotate through the feed drive motor 43, so as to transfer the sludge that has not passed through the cylindrical filter core 11 to the cutting mechanism 5 in a mechanical conveying manner.

[0054] Preferably, see Figure 1 , Figure 2 and Figure 4 The feeding screw rod 42 is arranged close to the inner wall of the return material shell 41 , and a humidifying pipe 7 is connected to the middle position of the return material shell 41 , and the humidifying pipe 7 is connected to the outlet of the sludge pump on the mud outlet pipe 3 .

[0055] Since the outlet of the cutting mechanism 5 is connected to the mud inlet pipe 2 through the return pipe 6, the feeding screw 42 is arranged close to the inner wall of the return shell 41, which can meet the sealing requirements as much as possible without affecting the rotation of the feeding screw 42. Combined with the sludge entering the return shell 41, the sludge filter 1 and the cutting mechanism 5 are pressure-isolated, ensuring that the sludge in the cutting mechanism 5 can flow under the negative pressure suction of the sludge pump.

[0056] At the same time, since the water content of the sludge that has not passed through the cylindrical filter core 11 is greatly reduced when it is lifted to the top of the sludge filter 1, the fluidity of the sludge in the return mechanism 4 becomes poor, and the setting of the humidifying pipe 7 can use the sludge pump to transport the filtered sludge with a higher water content in the mud outlet pipe 3 to the return mechanism 4, thereby diluting the sludge in the return mechanism 4, which not only increases the fluidity of the sludge in the return shell 41, but also improves the sealing between the feeding screw 42 and the return shell 41.

[0057] Preferably, in this embodiment, the material return mechanism 4 is made entirely of stainless steel.

[0058] Preferably, see Figure 5 The cutting mechanism 5 includes a cutting shell 51, a cutting shaft 52 and a cutting drive motor 53. One end of the cutting shell 51 in the length direction is connected to the material return mechanism 4, and the other end is connected to the mud inlet pipe 2. The cutting shaft 52 is horizontally arranged in the cutting shell 51, and the cutting shaft 52 is installed with an impeller on the side close to the material return mechanism 4, and a plurality of cutting blade groups 54 are arranged at intervals in the direction away from the impeller. The cutting drive motor 53 is arranged outside the cutting shell 51 and is axially connected to the cutting shaft 52 through a drive shaft.

[0059] As the sludge enters the cutting mechanism 5 from the upper return mechanism 4 and flows toward the outlet under pressure, the cutting drive motor 53 drives the cutting shaft 52 to rotate, thereby driving the impeller to rotate synchronously, thereby increasing the fluidity of the sludge and indirectly crushing the sludge blocks. Afterwards, multiple cutting blade groups 54 perform multiple cutting edge shears on the fibers in the sludge, and finally the cut sludge is re-integrated into the sludge inlet pipe 2 through the return pipe 6.

[0060] Preferably, see Figure 5 In this embodiment, the cutting shaft 52 is provided with two cutting blade sets 54 at intervals in a direction away from the impeller.

[0061] Preferably, see Figure 5 and Figure 6 The cutting blade group 54 includes a fixed blade 541 and a movable blade 542. The fixed blade 541 is inserted into the cutting shaft 52 and fixedly connected to the inner cylinder wall of the cutting housing 51. The fixed blade 541 is provided with a plurality of through holes for the sludge to pass through. The movable blade 542 is mounted on the cutting shaft 52. The plurality of movable blades on the movable blade 542 elastically abut against one side of the fixed blade 541. Each movable blade can cooperate with the through hole to perform a shearing action during the rotation of the movable blade 542. When the cutting drive motor 53 drives the cutting shaft 52 to rotate, the movable blade 542 will rotate synchronously with the cutting shaft 52 and continuously cooperate with the plurality of through holes on the fixed blade 541 to perform a shearing action, thereby performing a fiber cutting edge shearing on the sludge flowing through the through holes.

[0062] Preferably, in this embodiment, the movable blade on the movable blade 542 is elastically abutted against the fixed blade 541 via a pressing spring.

[0063] Preferably, an even number of through holes for the sludge to pass through are circumferentially and evenly spaced on the fixed blade 541 to eliminate the shear load peak and balance the load.

[0064] This embodiment also provides a sludge dewatering and inlet system, which adopts the above-mentioned sludge fiber cutting and processing device, wherein the inlet pipe 2 is connected to the gravity pipe for conveying sludge at the front end, and the outlet pipe 3 is connected to the inlet of the next process equipment. The sludge dewatering and inlet system of this embodiment adopts the above-mentioned sludge fiber cutting and processing device, thereby eliminating the defect of the original fiber cutting machine in the system and avoiding the blockage of subsequent equipment.

[0065] Preferably, in this embodiment, the inner and outer diameters of the mud inlet pipe 2 are matched with the inner and outer diameters of the gravity pipe.

[0066] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A sludge fiber cutting and processing device, characterized in that: The invention comprises a sludge filter (1), a sludge inlet pipe (2), a sludge outlet pipe (3), a material return mechanism (4) and a cutting mechanism (5); the sludge filter (1) is vertically arranged and is provided with a cylindrical filter core (11) and a sludge lifting assembly (12) inside; the cylindrical filter core (11) separates an inner space and an outer space inside the sludge filter (1); the sludge lifting assembly (12) is arranged in the inner space and can drive the sludge in the inner space to be lifted upwards; a lifting drive motor (13) arranged outside the sludge filter (1) drives the sludge lifting assembly (12) to work; the sludge inlet pipe (2) and the sludge outlet pipe (3) are connected to each other to form a sludge lifting mechanism (12); The sludge filter (1) is connected to the inner space of the sludge filter (1); a sludge pump is provided in the sludge outlet pipe (3) and is connected to the outer space of the sludge filter (1); the return mechanism (4) is arranged at the upper part of the sludge filter (1), and the return mechanism (4) can drive the sludge to move horizontally and laterally and be connected to the side wall of the sludge filter (1); the cutting mechanism (5) is arranged below the return mechanism (4), and the cutting mechanism (5) can horizontally and laterally cut the fibers in the sludge and be connected to the return mechanism (4); a return pipe (6) extends from the bottom of the cutting mechanism (5) and is connected to the sludge inlet pipe (2).

2. The sludge fiber cutting and processing device according to claim 1, characterized in that: The cylindrical filter core (11) is welded together from a plurality of wedge-shaped bars arranged at equal intervals in an annular direction, and the filter gap between two adjacent wedge-shaped bars gradually increases from the inner space to the outer space.

3. The sludge fiber cutting and processing device according to claim 1, characterized in that: The sludge filter (1) comprises a filter housing (14); the internal space of the filter housing (14) is partitioned into a sludge storage area (141), a receiving area (142) and a sludge inlet area (143) from high to low along the height direction; the material return mechanism (4) is connected to the sludge storage area (141); the cylindrical filter core (11) is arranged in the receiving area (142); the sludge inlet pipe (2) is connected to the sludge inlet area (143); and the sludge lifting assembly (12) is connected to the sludge storage area (141), the receiving area (142) and the sludge inlet area (143) at the same time.

4. The sludge fiber cutting and processing device according to claim 3, characterized in that: The sludge lifting assembly (12) comprises a lifting screw rod (121) and a connecting shaft (122); the lifting screw rod (121) is coaxially arranged with the cylindrical filter core (11) in the accommodating area (142) and penetrates into the sludge inlet area (143); the connecting shaft (122) is arranged in the sludge storage area (141) and is provided with a stirring impeller (123) on the outer peripheral surface; one end of the connecting shaft (122) is axially connected to the lifting screw rod (121) below, and the other end passes through the sludge storage area (141) and is axially connected to the driving shaft of the lifting drive motor (13) above.

5. The sludge fiber cutting and processing device according to claim 1, characterized in that: The material return mechanism (4) comprises a material return shell (41), a feeding screw rod (42) and a feeding drive motor (43); one end of the material return shell (41) in the length direction is connected to the sludge filter (1), and the other end is connected to the cutting mechanism (5); the feeding screw rod (42) is horizontally arranged in the material return shell (41); the feeding drive motor (43) is arranged outside the material return shell (41) and is axially connected to the feeding screw rod (42) through a driving shaft.

6. The sludge fiber cutting and processing device according to claim 5, characterized in that: The feeding screw rod (42) is arranged close to the inner wall of the return material shell (41), and a humidifying pipe (7) is connected to the middle position of the return material shell (41), and the humidifying pipe (7) is connected to the outlet of the sludge pump on the sludge outlet pipe (3).

7. The sludge fiber cutting and processing device according to claim 1, characterized in that: The cutting mechanism (5) comprises a cutting shell (51), a cutting shaft (52) and a cutting drive motor (53); one end of the cutting shell (51) in the length direction is connected to the material return mechanism (4), and the other end is connected to the mud inlet pipe (2); the cutting shaft (52) is horizontally arranged in the cutting shell (51), and the cutting shaft (52) is provided with an impeller on one side close to the material return mechanism (4), and a plurality of cutting blade groups (54) are arranged at intervals in a direction away from the impeller; the cutting drive motor (53) is arranged outside the cutting shell (51) and is axially connected to the cutting shaft (52) through a drive shaft.

8. The sludge fiber cutting and processing device according to claim 7, characterized in that: The cutting blade group (54) comprises a fixed blade (541) and a movable blade (542); the fixed blade (541) is inserted into the cutting shaft (52) and fixedly connected to the inner cylinder wall of the cutting shell (51); the fixed blade (541) is provided with a plurality of through holes for sludge to pass through; the movable blade (542) is mounted on the cutting shaft (52); and a plurality of movable blades on the movable blade (542) are elastically abutted against a side surface of the fixed blade (541); each movable blade can cooperate with the through hole to perform a shearing action during the rotation of the movable blade (542).

9. The sludge fiber cutting and processing device according to claim 8, characterized in that: An even number of through holes for sludge to pass through are circumferentially and evenly spaced on the fixed blade (541).

10. A sludge dewatering and sludge feeding system, characterized in that: The sludge fiber cutting and processing device according to any one of claims 1 to 9 is adopted, wherein the sludge inlet pipe (2) is connected to a gravity pipe for conveying sludge at the front end, and the sludge outlet pipe (3) is connected to an inlet of equipment in the next process.

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