A bottom sludge conveying device for sewage treatment

Abstract

This utility model discloses a sludge conveying device for wastewater treatment, including a shaftless screw conveyor assembly and a screw pump. A guide bucket is provided between the shaftless screw conveyor assembly and the screw pump. The shaftless screw conveyor assembly includes a base, and a first motor is installed at one end of the base. The output shaft of the first motor is fixedly connected to the screw conveyor blades. A steel mesh is provided at the bottom of the base. The screw pump includes a pump casing, and a second motor is installed at one end of the pump casing. The output shaft of the second motor is fixedly connected to a screw. The pump casing has an inlet and an outlet. This utility model uses the shaftless screw conveyor assembly and screw pump together to separate high-solids-content sludge and low-solids-content sludge through the steel mesh. The high-solids-content sludge is forcibly pushed by the shaftless screw conveyor assembly to avoid blockage due to insufficient pressure. The low-solids-content sludge is conveyed through the screw pump and sealed pipeline to reduce the risk of leakage.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to a bottom sludge conveying device for wastewater treatment. Background Technology

[0002] Wastewater treatment refers to the process of transforming pollutant-containing wastewater (such as domestic sewage and industrial wastewater) into water that meets specific water quality standards (such as being discharged into natural water bodies, reused, or used for irrigation) through a series of physical, chemical, or biological methods. Its core objectives are to reduce the harm of pollutants to the environment, protect water resources, maintain ecological balance, and safeguard human health. In the wastewater treatment process, the transport of bottom sludge (such as sludge accumulated at the bottom of sedimentation tanks, sludge thickening tanks, and digesters) is a crucial step in the sludge treatment system.

[0003] The fluidity of sediments with different solid contents varies significantly. Sediments with high solid contents require high pressure or strong mechanical pushing, while sediments with low solid contents are usually pressure transported in the form of slurry. The fluidity of the two types of sediments is quite different, and mixed transport can lead to problems such as pipeline blockage by high solid contents sediments or leakage of low solid contents sediments. Utility Model Content

[0004] The purpose of this invention is to provide a bottom sludge conveying device for sewage treatment, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a bottom sludge conveying device for sewage treatment, comprising a shaftless screw conveying assembly and a screw pump, wherein a guide bucket is provided between the shaftless screw conveying assembly and the screw pump, the shaftless screw conveying assembly includes a base, a first motor is installed at one end of the base, the output shaft of the first motor is fixedly connected to the screw conveying blades, a steel mesh is provided at the bottom of the base, the screw pump includes a pump casing, a second motor is installed at one end of the pump casing, the output shaft of the second motor is fixedly connected to the screw, and an inlet and an outlet are provided on the pump casing.

[0006] One end of the guide bucket is fixedly connected to the base of the shaftless screw conveyor assembly and is covered outside the steel mesh.

[0007] The other end of the guide bucket is provided with a discharge port, which is fixedly connected to the feed port of the screw pump.

[0008] The spiral conveyor blades are located inside the base.

[0009] One end of the base is provided with a discharge end.

[0010] The screw is located inside the pump casing.

[0011] The shaftless screw conveyor assembly, the guide bucket, and the screw pump are fixedly connected from top to bottom.

[0012] Flanges are provided at both the inlet and outlet.

[0013] A flange is provided at the discharge port.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This utility model combines a shaftless screw conveyor assembly with a screw pump. It separates high-solids-content sediment from low-solids-content sediment using a steel mesh. The shaftless screw conveyor assembly and the screw pump transport the high-solids-content sediment and the low-solids-content sediment respectively. The high-solids-content sediment is forcibly pushed by the shaftless screw conveyor assembly to avoid blockage due to insufficient pressure. The low-solids-content sediment is transported by the screw pump and sealed pipeline to reduce the risk of leakage. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of one side view of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the structure from another side view of the present invention;

[0018] Figure 3 This is a top view of the shaftless screw conveyor assembly of this utility model.

[0019] Figure 4 This is a bottom view of the shaftless screw conveyor assembly of this utility model.

[0020] In the diagram: 1. Shaftless screw conveyor assembly; 2. Screw pump; 3. Guide bucket; 11. Base; 12. First motor; 13. Screw conveyor blades; 14. Discharge end; 15. Steel mesh; 21. Pump casing; 22. Second motor; 23. Inlet; 24. Outlet; 31. Discharge port. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-4This utility model provides a technical solution: a bottom sludge conveying device for sewage treatment, including a shaftless screw conveyor assembly 1 and a screw pump 2. The shaftless screw conveyor assembly 1 pushes the sludge conveying through screw conveying blades 13 without a central shaft, solving the problem that shafted screws are easily entangled by fibers and debris. A guide bucket 3 is provided between the shaftless screw conveyor assembly 1 and the screw pump 2. The shaftless screw conveyor assembly 1 includes a base 11, a first motor 12 is installed at one end of the base 11, and the output shaft of the first motor 12 is fixedly connected to the screw conveying blades 13. A steel mesh 15 is provided at the bottom of the base 11, and the steel mesh 15 includes several holes. Some mud will pass through the gaps in the steel mesh 15 and enter the guide bucket 3, and then enter the screw pump 2. The screw pump 2 includes a pump casing 21, and a second motor 22 is installed at one end of the pump casing 21. The output shaft of the second motor 22 is fixedly connected to the screw. The pump casing 21 has an inlet 23 and an outlet 24. The inlet 23 is the suction end, and the outlet 24 is the discharge end. The screw pump 2 is a positive displacement pump. A sealed chamber is formed by the meshing of the active screw and the bushing. The axial movement of the chamber pushes the bottom mud from the suction end to the discharge end. The first motor 12 and the second motor 22 both reduce the speed and increase the torque through a reducer.

[0023] The shaftless screw conveyor assembly 1 and the screw pump 2 are used together. The bottom sediment first enters the shaftless screw conveyor assembly 1. The solid or semi-solid bottom sediment is conveyed by the shaftless screw conveyor assembly 1. The bottom sediment with low solid content enters the lower guide bucket 3 through the holes of the steel mesh 15, and then enters the lower screw pump 2 through the guide bucket 3. The screw pump 2 conveys the bottom sediment with low solid content.

[0024] During sediment transport, high-solids-content sediment and low-solids-content sediment are transported separately by shaftless screw conveyor assembly 1 and screw pump 2. High-solids-content sediment is forcibly pushed by shaftless screw conveyor assembly 1 to avoid blockage due to insufficient pressure. Low-solids-content sediment is transported by screw pump 2 and sealed pipeline to reduce the risk of leakage. Shaftless screw conveyor assembly 1 and screw pump 2 are used together. During the mixed transport process, low-solids-content sediment flows through steel mesh 15 into screw pump 2 and is transported by screw pump 2, while high-solids-content sediment is trapped in shaftless screw conveyor assembly 1 and transported by shaftless screw conveyor assembly 1, thereby preventing blockage or leakage.

[0025] One end of the guide bucket 3 is fixedly connected to the base 11 of the shaftless screw conveyor assembly 1 and is covered outside the steel mesh 15. The guide bucket 3 plays the role of guiding the flow, and the bottom mud with low solid content enters the guide bucket 3 below through the pores of the steel mesh 15.

[0026] The other end of the guide bucket 3 is provided with a discharge port 31, which is fixedly connected to the feed port 23 of the screw pump 2. The low solids content bottom mud inside the guide bucket 3 is discharged through the discharge port 31 and enters the pump casing 21 through the feed port 23 of the screw pump 2.

[0027] The spiral conveyor blade 13 is located inside the base 11. The first motor 12 drives the spiral conveyor blade 13 to rotate, and the rotation of the spiral conveyor blade 13 pushes the bottom mud along the base 11.

[0028] The base 11 has a discharge end 14 at one end, and the bottom mud inside the shaftless screw conveyor assembly 1 is finally discharged through the discharge end 14 at one end of the base 11.

[0029] The screw is located inside the pump casing 21. The engagement of the active screw and the bushing forms a sealed chamber, and the axial movement of the chamber pushes the bottom sludge from the suction end to the discharge end.

[0030] Among them, the shaftless screw conveyor assembly 1, the guide bucket 3 and the screw pump 2 are fixedly connected from top to bottom. The bottom mud first enters the shaftless screw conveyor assembly 1, and the bottom mud with low solid content enters the lower guide bucket 3 through the holes of the steel mesh 15, and then enters the lower screw pump 2 through the guide bucket 3.

[0031] Flanges are installed at both the inlet 23 and the outlet 24.

[0032] A flange is provided at the discharge port 31. The flange at the discharge port 31 is aligned with the flange at the inlet port 23 and is fixedly connected by multiple sets of bolts. The connection method is simple and easy to install and disassemble.

[0033] Working principle: In the sewage treatment process, the bottom sludge first enters the shaftless screw conveyor assembly 1. The bottom sludge with high solids content is trapped in the base 11 of the shaftless screw conveyor assembly 1. The first motor 12 drives the screw conveyor blades 13 to rotate. The rotation of the screw conveyor blades 13 pushes the bottom sludge along the base 11 and finally discharges it through the discharge end 14 at one end of the base 11. The bottom sludge with low solids content enters the lower guide bucket 3 through the holes of the steel mesh 15, and then enters the lower screw pump 2 through the guide bucket 3. The meshing of the active screw and the bushing forms a sealed chamber. The axial movement of the chamber pushes the bottom sludge from the inlet 23 to the outlet 24 and finally discharges it through the outlet 24.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bottom sludge conveying apparatus for sewage treatment, comprising an axle-free screw conveying assembly (1) and a screw pump (2), characterized in that: A guide bucket (3) is provided between the shaftless screw conveyor assembly (1) and the screw pump (2). The shaftless screw conveyor assembly (1) includes a base (11). A first motor (12) is installed at one end of the base (11). The output shaft of the first motor (12) is fixedly connected to the screw conveyor blade (13). A steel mesh (15) is provided at the bottom of the base (11). The screw pump (2) includes a pump casing (21). A second motor (22) is installed at one end of the pump casing (21). The output shaft of the second motor (22) is fixedly connected to the screw. An inlet (23) and an outlet (24) are provided on the pump casing (21).

2. The bottom sludge delivery apparatus for sewage treatment according to claim 1, characterized by: One end of the guide bucket (3) is fixedly connected to the base (11) of the shaftless screw conveyor assembly (1) and covered outside the steel mesh (15).

3. The bottom sludge delivery apparatus for sewage treatment according to claim 1, characterized by: The other end of the guide bucket (3) is provided with a discharge port (31), which is fixedly connected to the feed port (23) of the screw pump (2).

4. The bottom sludge delivery apparatus for sewage treatment according to claim 1, characterized by: The spiral conveying blade (13) is located inside the base (11).

5. The bottom sludge delivery apparatus for sewage treatment according to claim 1, characterized by: One end of the base (11) is provided with a discharge end (14).

6. The bottom sludge delivery apparatus for sewage treatment according to claim 1, characterized by: The screw is located inside the pump casing (21).

7. The bottom sludge delivery apparatus for sewage treatment according to claim 1, characterized by: The shaftless screw conveyor assembly (1), the guide bucket (3), and the screw pump (2) are fixedly connected from top to bottom.

8. The bottom sludge delivery apparatus for sewage treatment according to claim 1, characterized by: Flanges are provided at both the inlet (23) and outlet (24).

9. The bottom sludge delivery apparatus for sewage treatment according to claim 3, characterized by: A flange is provided at the discharge port (31).

Images