Sludge discharge equipment with backwashing anti-blocking structure for sewage treatment

Abstract

The invention discloses sludge discharge equipment with a backwashing anti-blocking structure for sewage treatment, which is based on the traditional screw propulsion sludge discharge principle, and is characterized in that a sludge discharge channel is horizontally arranged at the bottom of a sludge collecting hopper, horizontal screw propulsion sludge discharge is carried out by virtue of a spiral auger, and sewage is filtered out from a plurality of filter holes horizontally arranged at the bottom end of a sludge discharge pipe in a barrier-free manner; as the internal space of the sludge discharge pipe is gradually reduced towards the sludge discharge end, the extrusion force of pushing on the sludge is increased, the sludge is gradually compressed in the efficient water filtering process, the subsequent forming and sludge discharge are facilitated, in addition, the sludge discharge channel is arranged to be in an up-and-down overturning type, the sludge discharge channel is regularly rotated, and the up-and-down positions of the sludge inlet and the filter holes are exchanged; a plurality of groups of backwashing spray pipes are used for backwashing the filter holes, water flows into the sludge discharge channel, and sewage in the sludge discharge channel is effectively discharged towards one side of the sludge inlet in an inclined downward manner under the driving of the reverse rotation of the spiral auger, so that the internal structure of the sludge discharge channel is cleaned, and blockage is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, and more specifically to a sludge discharge device for sewage treatment with a backwashing anti-blocking structure. Background Art

[0002] When treating sewage, sewage treatment plants produce a large amount of sludge every day. The sludge contains a large amount of easily degradable organic matter. The sludge in the sewage needs to be filtered and dehydrated to reduce the mud content in the sewage so as to recycle or discharge the filtered water.

[0003] After searching, the patent publication number CN118384606A discloses a sludge discharge equipment for rural sewage treatment, which drives the sewage and sludge downward into the sedimentation barrel through the rotation of the auger plate, and the dry and wet separation is initially carried out through the leakage hole when transporting the sewage, and then the dry and wet separation is further carried out through the filter hole. By starting the servo motor 2, the screw will be driven to rotate in the extrusion column, and then the sludge after dry and wet separation will be pushed into the compression cylinder, and the slide plate will be pushed to compress the compression spring. As the extrusion column squeezes the sludge, the sludge will be compressed into blocks.

[0004] Although this patent can filter and compress the sludge during the sludge discharge process, and a number of leakage holes are opened on the auger plate for separating mud and water, the auger plate is vertically arranged, and the water separated from the upper part will still flow into the lower part, resulting in average sludge separation effect at the bottom. In addition, after the auger plate has been used for a period of time, the sludge is easy to clog the leakage holes and cover the end face of the auger plate, thereby reducing the conveying spacing of the auger plate and affecting the sludge discharge efficiency. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that the mud discharge structure in the prior art has poor mud-water separation effect and is easy to cause blockage. A mud discharge equipment for sewage treatment with a backwashing anti-blocking structure is now provided.

[0006] The object of the present invention can be achieved by the following technical scheme: a sludge discharge device for sewage treatment with a backwashing anti-blocking structure, a sedimentation tank with a sludge collecting bucket at the bottom, a sludge discharge groove at the bottom of the sludge collecting bucket, a bracket fixed to one side of the bottom of the sludge collecting bucket, a sludge inlet pipe that penetrates into the sludge discharge groove is rotatably driven on the bracket, the other end of the sludge inlet pipe extends outward and is fixedly connected to a sludge discharge pipe, the sludge discharge pipe is a conical structure with an inner diameter gradually decreasing along its outward extension direction, the inner end of the sludge discharge pipe is connected to the sludge inlet pipe through a conical pipe, and the sludge inlet pipe, the conical pipe and the sludge discharge pipe constitute a sludge discharge channel with an inner diameter that gradually decreases outward; The upper end wall of the mud inlet pipe is provided with a mud inlet port connected to the top of the mud discharge trough, a mud discharge conveying assembly extending to the mud discharge port at the end of the mud discharge pipe is rotatably installed inside the mud inlet pipe, and a plurality of filter holes are provided on the bottom end wall of the mud discharge pipe; A flushing box is fixed on the other side of the bottom of the mud collecting bucket and is sleeved on the upper end of the mud discharge pipe. A flushing cavity connected to the outer wall of the mud discharge pipe is opened in the flushing box. A plurality of recoil nozzles are arranged at the top end of the flushing box along the extension direction of the mud discharge pipe. The plurality of recoil nozzles are commonly connected to a water inlet pipe.

[0007] Furthermore, the mud discharge conveying assembly includes a spiral shaft rotatably mounted on a bracket, the other end of the spiral shaft passes through the mud discharge channel and extends to the mud discharge port, and the outer end wall of the spiral shaft is fixedly sleeved with a spiral auger adapted to the inner wall of the mud discharge channel.

[0008] Furthermore, a plurality of stirring blades are annularly distributed on the end wall of the spiral shaft located on the inner side of the mud inlet pipe. The plurality of stirring blades are fixed on the spiral auger and extend to the conical pipe, and a mud discharge gap is reserved between the stirring blades and the conical pipe.

[0009] Furthermore, a rotary cutter located at the mud discharge port at the end of the mud discharge pipe is fixedly mounted on the outermost end of the spiral shaft.

[0010] Furthermore, a drainage channel sleeved on the lower end of the mud discharge pipe is fixed on the end wall of the mud collecting bucket away from the bracket, and the upper end of the drainage channel is arranged to be connected to the lower end of the flushing box.

[0011] Furthermore, the inner end of the drainage channel is connected to the bottom end of the mud discharge trough, and the lower part of the outer end of the drainage channel is connected to the sedimentation tank through a reflux pipe.

[0012] Furthermore, a mud pressing assembly connected to the mud discharge port at the end of the mud discharge pipe is fixed to the outer end of the flushing box through a connector.

[0013] Furthermore, the mud pressing assembly includes a fixed cylinder seat fixed at the outer end of the flushing box, and an upper mold sleeve is fixed at the end of the fixed cylinder seat, which is coaxially arranged with the mud discharge pipe and connected to the end of the mud discharge pipe. A lower mold sleeve that is also connected to the end wall of the mud discharge pipe is also installed on the fixed cylinder seat through horizontal pushing of a linear telescopic rod, and the two sides of the upper end of the lower mold sleeve are respectively slidably connected to the two side end walls of the lower end of the upper mold sleeve.

[0014] Furthermore, a compression chamber is formed between the lower die sleeve and the upper die sleeve, and a pressure sensor is embedded and installed on the inner end wall of the compression chamber.

[0015] Furthermore, a mud collecting bin located below the upper mold sleeve is placed on one side of the sedimentation tank, and a mud discharge chute extending from the upper side to the lower side of the compression chamber is fixed on one side of the edge of the mud collecting bin.

[0016] Compared with the prior art, the advantages of the present invention are: This scheme is based on the traditional principle of spiral propulsion mud discharge. By setting a horizontally arranged mud discharge channel consisting of a mud inlet pipe and a mud discharge pipe at the bottom of the mud collecting bucket, the horizontal spiral propulsion mud discharge is carried out by relying on a rotating spiral auger. The sewage is filtered out from multiple filter holes on the bottom end surface of the mud discharge pipe. As the internal space of the mud discharge pipe gradually shrinks toward the mud discharge port, the sludge is squeezed by the spiral propulsion. The sludge is gradually compressed during the efficient water filtration process. The mud pressing component installed at the mud discharge port of the mud discharge pipe is used to facilitate the subsequent mud forming and discharge. The mud discharge channel is set to be flipped up and down, and the mud discharge channel is rotated regularly. The mud inlet and filter holes are swapped up and down. Multiple sets of backwash nozzles are used to backwash the filter holes. Pulse water flows through the filter holes into the mud discharge channel. Under the reverse drive of the spiral auger, the sewage in the mud discharge channel is effectively tilted downward and transported toward the mud inlet. The mud discharge conveying component and the sludge on the end wall of the mud discharge channel are effectively cleaned to prevent the mud discharge channel from being blocked. The clean sewage is finally discharged into the discharge channel through the mud inlet and mud discharge trough, and is pumped into the sedimentation tank by the reflux pipe for circulation treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the external structure of the present invention; Figure 2 It is a cross-sectional view of the present invention when performing mud discharge work; Figure 3 It is a structural schematic diagram of the combination of the mud discharge channel, the flushing box, the liquid discharge channel and the mud pressing assembly of the present invention; Figure 4 It is a structural schematic diagram of the junction of the mud discharge channel and the mud pressing assembly of the present invention; Figure 5 is a cross-sectional view of the mud discharge channel of the present invention; Figure 6 It is a structural schematic diagram of the mud discharge and conveying assembly of the present invention; Figure 7 It is a structural schematic diagram of the mud pressing assembly of the present invention; Figure 8 A partial cross-sectional view of a mud pressing assembly of the present invention; Fig. 9 It is a schematic diagram of the structure of the present invention when performing backwashing work.

[0018] Description of the numbers in the figure: 1. Sedimentation tank; 101. Mud collecting bucket; 102. Mud discharge trough; 2. Mud inlet pipe; 201. Mud inlet; 3. Mud discharge pipe; 301. Filter hole; 4. Auger; 5. Drive motor 1; 6. Screw shaft; 7. Agitator; 8. Peeler; 9. Mud pressing assembly, 91. Fixed cylinder seat; 92. Upper die sleeve; 93. Lower die sleeve; 94. Linear telescopic rod; 95. Pressure sensor; 10. Drainage channel; 11. Reflux pipe; 12. Flushing box; 13. Recoil nozzle; 14. Water inlet pipe; 15. Drive motor 2; 16. Transmission gear. DETAILED DESCRIPTION

[0019] The following will combine the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all the embodiments. All other embodiments obtained by ordinary technicians in this field without creative work based on the embodiments of the present invention belong to the scope of protection of the present invention. Example 1

[0020] Aiming at the fact that the vertical mud discharge structure of the spiral auger in the prior art has poor mud-water separation effect and is prone to cause the auger plate to be covered with sludge and easily blocked, the following technical solution is proposed: The present invention discloses a sludge discharge device for sewage treatment with a backwashing anti-blocking structure. Figure 1 , Figure 2 , comprising a sedimentation tank 1 with a mud collecting bucket 101 at the bottom, drainage slopes arranged downwardly toward the mud collecting bucket 101 are arranged on both sides of the bottom of the sedimentation tank 1, multiple groups of sewage inlet pipes adjacent to the upper ends of the drainage slopes are embedded and installed on the left and right sides of the sedimentation tank 1, and the mud collecting bucket 101 is extended downwardly; A plurality of sewage inlet pipes are distributed at the upper ends of the drainage slopes on both sides of the bottom of the sedimentation tank 1. Sewage is discharged into the sedimentation tank 1 through the sewage inlet pipes. The sewage hits the drainage slope downward and flows back upward at the middle position of the sedimentation tank 1. In this design, during the sewage discharge process, the suspended matter in the sewage settles into the sludge collecting bucket 101 under the action of gravity to form sludge, thereby avoiding the sludge from settling on both sides of the bottom of the sedimentation tank 1, and effectively causing the sludge to be concentrated in the sludge collecting bucket 101.

[0021] See also Figure 2-Figure 3A mud discharge groove 102 is provided at the bottom of the mud collecting bucket 101, and a bracket is fixed on one side of the bottom of the mud collecting bucket 101. A mud inlet pipe 2 that penetrates into the mud discharge groove 102 is rotatably driven on the bracket. The other end of the mud inlet pipe 2 extends outward and is fixedly connected to a mud discharge pipe 3. The mud inlet pipe 2 is rotatably installed with the bracket at one end away from the mud discharge pipe 3 through a rotating shaft, and a driving motor 15 for driving the rotating shaft to rotate is installed on the bracket. Transmission gears 16 that are meshed with each other are fixed on the driving end of the driving motor 15 and the end wall of the rotating shaft, and the upside-down flipping design of the mud discharge channel is realized through an external driving mechanism.

[0022] See also Figure 2-Figure 6 The mud discharge pipe 3 is a conical structure with an inner diameter gradually decreasing along its outward extension direction. The inner end of the mud discharge pipe 3 is connected to the mud inlet pipe 2 through a conical pipe. The mud inlet pipe 2, the conical pipe and the mud discharge pipe 3 constitute a mud discharge channel with an inner diameter gradually decreasing outward. The upper end wall of the mud inlet pipe 2 is provided with a mud inlet port 201 connected and docked with the top of the mud discharge groove 102. A mud discharge conveying assembly extending to the outer end of the mud discharge pipe 3 is rotatably installed inside the mud inlet pipe 2. A driving motor 5 for rotating the mud discharge conveying assembly is fixed to the outer end of the rotating shaft. A plurality of filter holes 301 are provided on the bottom end wall of the mud discharge pipe 3; The mud discharge conveying assembly includes a spiral shaft 6 rotatably mounted on a bracket, the other end of the spiral shaft 6 penetrates the mud discharge channel and extends to the mud discharge port, the outer end wall of the spiral shaft 6 is fixedly sleeved with a spiral auger 4 adapted to the inner wall of the mud discharge channel, the outer diameter of the spiral auger 4 gradually increases from the mud discharge pipe 3 to the mud inlet pipe 2, and the outer end wall of the spiral auger 4 located on the inner side of the mud discharge pipe 3 is movably fitted with the inner wall of the mud discharge pipe 3; A drainage channel 10 is fixed on the end wall of the mud collecting bucket 101 away from the bracket. The channel 10 is sleeved on the lower end of the mud discharge pipe 3 and connected to the bottom end of the mud discharge trough 102. A connecting port connected to the drainage channel 10 is provided on one side of the bottom end of the mud discharge trough 102. The bottom surface of the drainage channel 10 is inclined downward outward along the connecting port. One side of the bottom end of the drainage channel 10 is connected to the sedimentation tank 1 through a return pipe 11. A pump is provided on the rear end wall of the drainage channel 10 to provide driving force for the return pipe 11.

[0023] In the initial stage of sewage discharge and sedimentation, the mud inlet 201 is set downward, and the other end face of the mud inlet pipe 2 is sealed at the top of the mud discharge tank 102, which is convenient for sewage discharge and static work. After the upper clear liquid of the sedimentation tank 1 is subsequently extracted, the sludge is settled in the mud collecting bucket 101. At this time, the mud discharge channel is rotated in the reverse direction until the mud inlet 201 is connected to the upper end of the mud discharge tank 102; Start the sludge conveying component and use the rotation of the spiral auger 4 to spirally propel the sludge toward the sludge discharge port outside the sludge discharge pipe 3. The spiral auger 4 adapts to the internal structure design of the sludge discharge pipe 3. During the conveying process, the internal space of the sludge discharge pipe 3 gradually shrinks, and the squeezing force of the spiral propulsion is greater, which not only improves the water filtration effect, but also gradually compresses the sludge, thus doing preliminary work for the subsequent compression molding of the sludge.

[0024] In addition, a plurality of stirring blades 7 are distributed in an annular manner on the end wall of the spiral shaft 6 located on the inner side of the mud inlet pipe 2. The plurality of stirring blades 7 are fixed on the spiral auger 4 and extend to the conical tube. The outer wall of the stirring blade 7 is movably arranged with the inner wall of the mud inlet pipe 2, and a mud discharge gap is reserved between the stirring blade 7 and the conical tube. A plurality of stirring blades 7 that rotate synchronously with the spiral shaft 6 are added on the inner side of the mud inlet pipe 2. The outer diameter of the stirring blade 7 is matched with the inner diameter of the mud inlet pipe 2. After the mud inlet port 201 is flipped upward, the spiral auger 4 and the stirring blade 7 are exposed. The stirring blade 7 located at the top extends to the outside of the mud inlet port 201. During the rotation of the plurality of stirring blades 7, the sludge at the bottom of the mud collecting bucket 101 is effectively flipped and stirred, which is beneficial for the sludge to enter the mud inlet pipe 2 through the mud inlet port 201, and a mud discharge gap is reserved between the stirring blade 7 and the conical tube to avoid affecting the mud discharge progress due to the setting of the stirring blade 7.

[0025] See also Fig. 9 A flushing box 12 is fixed at the upper end of the discharge channel 10 and is sleeved on the upper end of the mud discharge pipe 3. A flushing cavity connected to the outer wall of the mud discharge pipe 3 is opened in the flushing box 12. A plurality of groups of recoil nozzles 13 are arranged horizontally at the top end of the flushing box 12. The plurality of recoil nozzles 13 are connected to a water inlet pipe 14, and a pulse valve is installed on the water inlet pipe 14. The mud discharge channel is set to be upside down and down, which not only realizes the intermittent switching between sewage discharge and mud discharge, but also rotates the mud discharge channel during the non-mud discharge process, and the mud inlet 201 and the filter hole 301 are swapped up and down, and the upper end of the mud discharge groove 102 is blocked by the sealing surface of the mud inlet pipe 2. At this time, the mud inlet 201 is downwardly connected to the bottom of the mud discharge groove 102, and the filter hole 301 is rotated upward to the inside of the flushing box 12. The two sides of the bottom of the flushing cavity are just connected with the two sides of the edge of the filter hole 301 that rotates upward, so that when multiple recoil nozzles 13 are started, pulse water flows into multiple filter holes 301 to reduce the residual water in the flushing cavity; A plurality of backwash nozzles 13 are used to backwash the filter holes 301, and pulsed water flows through the plurality of filter holes 301 into the mud discharge channel. On the one hand, the filter holes 301 are punched and cleaned, and on the other hand, the spiral auger 4 is driven in reverse to rotate during the backwashing process. Since the mud discharge pipe 3 is a conical structure, the sewage in the mud discharge channel is effectively tilted downward and transported toward the mud inlet 201, which is convenient for spiral transportation of sewage. The water flow effectively cleans the mud discharge conveying component and the sludge on the end wall of the mud discharge channel to prevent the mud discharge channel from being blocked. The clean sewage is finally discharged into the discharge channel 10 through the mud inlet 201 and the mud discharge trough 102. The inner bottom wall of the liquid discharge channel 10 and the inner bottom wall of the mud discharge trough 102 are arranged as an inclined surface tilted downward toward one end of the return pipe 11, so that the clean sewage is pumped from the return pipe 11 to the sedimentation tank 1 for circulation treatment. Example 2

[0026] On the basis of Example 1, this embodiment adds a mud pressing assembly 9 at the mud discharge port of the mud discharge channel and a rotary cutter 8 that rotates synchronously with the mud inlet pipe 2 is provided at the outer end of the mud inlet pipe 2, which is conducive to compressing the sludge discharged from the mud discharge port and discharging it intermittently. The specific structure and process are as follows: See also Figure 1-Figure 2 as well as Figure 7-Figure 8 A mud pressing assembly 9 connected to the end of the mud discharge pipe 3 is fixed at the outer end of the flushing box 12, and a rotary cutter 8 is fixed on the end wall of the spiral shaft 6 located at the end of the mud discharge pipe 3. The mud pressing assembly 9 includes a fixed cylinder seat 91 fixed at the outer end of the flushing box 12, and an upper die sleeve 92 coaxially arranged with the mud discharge pipe 3 and connected to the end of the mud discharge pipe 3 is fixed at the end of the fixed cylinder seat 91. A lower die sleeve 93 connected to the end wall of the mud discharge pipe 3 is also installed on the fixed cylinder seat 91 through a linear telescopic rod 94 to push horizontally, and the two sides of the upper end of the lower die sleeve 93 are respectively slidably connected with the two side end walls of the lower end of the upper die sleeve 92; A compression chamber is formed between the lower die sleeve 93 and the upper die sleeve 92, and a pressure sensor 95 is embedded in the inner end wall of the compression chamber. The sludge is filtered and initially compressed through the cooperation of the sludge discharge channel and the sludge discharge conveying assembly. The sludge discharged from the end of the sludge discharge pipe 3 enters the compression chamber formed by the upper die sleeve 92 and the lower die sleeve 93, and the sludge is continuously pushed into the compression chamber. The sludge is squeezed and the force is transmitted to the pressure sensor 95. When the squeezing force reaches the preset pressure value, the linear telescopic rod 94 is started at this time. The linear telescopic rod 94 quickly pushes the lower die sleeve 93 toward the inside of the fixed cylinder seat 91, completely exposing the lower end of the upper die sleeve 92, and the formed sludge forming column falls out of the compression chamber under the cutting action of the rotary cutter 8.

[0027] A mud collecting bin is placed below the upper mold sleeve 92 on one side of the sedimentation tank 1, and a mud discharge chute is fixed on one side of the edge of the mud collecting bin, extending from the top to the bottom of the compression chamber. The sludge forming column that has separated from the compression chamber is discharged into the mud collecting bin through the mud discharge chute. Sludge compression molding and intermittent material removal can be achieved by relying only on a single upper mold sleeve 92 and a lower mold sleeve 93 that can be quickly extended left and right.

[0028] In summary: based on the traditional principle of spiral propulsion mud discharge, the mud discharge structure and mud discharge action are improved, specifically: by arranging a mud inlet pipe 2 and a mud discharge pipe 3 at the bottom of the mud collecting bucket 101 to form a mud discharge channel that extends horizontally outward, and arranging a mud discharge conveying component in the mud discharge channel, during the horizontal spiral propulsion mud discharge process, sewage is unimpededly filtered out from a plurality of filter holes 301 horizontally arranged on the bottom end surface of the mud discharge pipe 3, so that the sludge is transported and continuously filtered efficiently, and because the internal space of the mud discharge pipe 3 gradually shrinks outward, the greater the squeezing force of the spiral propulsion on the sludge during the continuous outward transportation process, the water filtering effect is improved, and the sludge is compressed, which is convenient for the subsequent compression and discharge of the sludge; When regular anti-clogging cleaning is required, the mud discharge channel only needs to be turned upside down. At this time, the mud inlet 201 is set downward to block the bottom of the mud collecting bucket 101, and the filter hole 301 is rotated upward to the inside of the flushing box 12. The filter hole 301 is backwashed using multiple sets of backwashing nozzles 13. The flushing water enters the mud discharge channel through the filter hole 301 and rotates the spiral auger 4 in the opposite direction. Based on the conical setting of the mud discharge pipe 3, the sewage in the mud discharge channel is effectively tilted downward and transported toward the mud inlet 201. During the spiral conveying process, the mud discharge conveying component scrapes the inner wall of the mud discharge channel, and uses water flow impact to effectively clean the sludge on the mud discharge conveying component and the end wall of the mud discharge channel. The clean sewage is discharged into the discharge channel 10 through the mud inlet 201 and the mud discharge trough 102, and is pumped into the sedimentation tank 1 by the reflux pipe 11 for circulation treatment.

[0029] The above are only preferred specific implementation modes of the present invention; however, the protection scope of the present invention is not limited thereto; any technician familiar with the technical field within the technical scope disclosed by the present invention; any equivalent replacement or change based on the technical solution and improved concept of the present invention shall be covered within the protection scope of the present invention.

Claims

1. A sludge discharge device for sewage treatment with a backwashing anti-blocking structure, comprising a sedimentation tank (1) with a sludge collecting bucket (101) at the bottom, characterized in that: A mud discharge groove (102) is provided at the bottom of the mud collecting bucket (101), a bracket is fixed on one side of the bottom of the mud collecting bucket (101), a mud inlet pipe (2) is rotatably driven on the bracket and penetrates into the mud discharge groove (102), the other end of the mud inlet pipe (2) extends outward and is fixedly connected to a mud discharge pipe (3), the mud discharge pipe (3) is a conical structure with an inner diameter gradually decreasing outward, the inner end of the mud discharge pipe (3) is connected to the mud inlet pipe (2) through a conical pipe, and the mud inlet pipe (2), the conical pipe and the mud discharge pipe (3) constitute a mud discharge channel with an inner diameter gradually decreasing outward; The upper end wall of the mud inlet pipe (2) is provided with a mud inlet port (201) connected to and docked with the top of the mud discharge groove (102); a mud discharge conveying assembly extending to the mud discharge port at the end of the mud discharge channel is rotatably installed inside the mud inlet pipe (2); and a plurality of filter holes (301) are provided on the bottom end wall of the mud discharge pipe (3); A flushing box (12) is fixedly provided on the other side of the bottom of the mud collecting bucket (101) and is sleeved on the upper end of the mud discharge pipe (3). A flushing chamber connected to the outer wall of the mud discharge pipe (3) is provided in the flushing box (12). A plurality of groups of recoil nozzles (13) are arranged at the top end of the flushing box (12) along the extension direction of the mud discharge pipe (3). The plurality of groups of recoil nozzles (13) are commonly connected to an external water inlet pipe (14).

2. The sludge discharge equipment for sewage treatment with a backwashing anti-blocking structure according to claim 1 is characterized by: The mud discharge conveying assembly comprises a spiral shaft (6) rotatably mounted on a bracket, the other end of the spiral shaft (6) passing through the mud discharge channel and extending to the mud discharge port, and a spiral auger (4) adapted to the inner wall of the mud discharge channel is fixedly sleeved on the outer end wall of the spiral shaft (6).

3. The sludge discharge equipment for sewage treatment with a backwashing anti-blocking structure according to claim 2 is characterized by: The spiral shaft (6) is provided with a plurality of stirring blades (7) distributed in an annular manner on the end wall of the inner side of the mud inlet pipe (2); the plurality of stirring blades (7) are fixed on the spiral auger (4) and extend to the conical pipe, and a mud discharge gap is reserved between the stirring blades (7) and the conical pipe.

4. The sludge discharge equipment for sewage treatment with a backwashing anti-blocking structure according to claim 3 is characterized by: The outermost end of the spiral shaft (6) is fixedly provided with a rotary cutter (8) located at the mud discharge port at the end of the mud discharge pipe (3).

5. The sludge discharge equipment for sewage treatment with a backwashing anti-blocking structure according to claim 1 is characterized by: A drainage channel (10) sleeved on the lower end of the mud discharge pipe (3) is fixed on the end wall of the mud collecting bucket (101) away from the bracket, and the upper end of the drainage channel (10) is arranged to be opposite to the lower end of the flushing box (12).

6. The sludge discharge equipment for sewage treatment with a backwashing anti-blocking structure according to claim 5 is characterized by: The inner end of the drainage channel (10) is connected to the bottom end of the mud discharge trough (102), and the lower part of the outer end of the drainage channel (10) is connected to the sedimentation tank (1) through a return pipe (11).

7. The sludge discharge equipment for sewage treatment with a backwashing anti-blocking structure according to claim 1 is characterized by: A mud pressing assembly (9) connected to the mud discharge port at the end of the mud discharge pipe (3) is fixed to the outer end of the flushing box (12) via a connecting piece.

8. The sludge discharge equipment for sewage treatment with a backwashing anti-blocking structure according to claim 7 is characterized by: The mud pressing assembly (9) comprises a fixed cylinder seat (91) fixed at the outer end of the flushing box (12), an upper die sleeve (92) being coaxially arranged with the mud discharge pipe (3) and connected to the end of the mud discharge pipe (3) being fixed to the end of the fixed cylinder seat (91), a lower die sleeve (93) also connected to the end wall of the mud discharge pipe (3) being installed on the fixed cylinder seat (91) by horizontal pushing through a linear telescopic rod (94), the lower die sleeve (93) having its upper end at both sides being slidably connected to the lower end walls of the upper die sleeve (92) at both sides.

9. The sludge discharge equipment for sewage treatment with a backwashing anti-blocking structure according to claim 8, characterized in that: A compression chamber of a cylindrical structure is formed between the lower die sleeve (93) and the upper die sleeve (92), and a pressure sensor (95) is embedded and installed on the inner end wall of the compression chamber.

10. The sludge discharge equipment for sewage treatment with a backwashing anti-blocking structure according to claim 9, characterized in that: A mud collecting bin located below the upper die sleeve (92) is placed on one side of the sedimentation tank (1), and a mud discharge slide extending from the top to the bottom of the compression chamber is fixed to one side of the edge of the mud collecting bin.

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