Sludge cell wall breaking well and sewage treatment system

Abstract

The utility model discloses a kind of sludge cell wall breaking well and sewage treatment system, belong to sewage treatment field, wall breaking well includes treatment well, flow guide cylinder and flow guide plate;The flow guide cylinder is arranged in the treatment well, and the space with treatment well between cylinder wall and treatment well has sludge circulation capability;The flow guide plate is fixed in the bottom in treatment well, below the flow guide cylinder;Flow guide plate is the plate structure of section and presents inverted V shape, tip end is towards flow guide cylinder, and the space with flow guide cylinder between lower end and flow guide plate has sludge circulation capability;The top of flow guide cylinder has sludge import, and the top of space between flow guide cylinder and treatment well has sludge export.The utility model has the advantages such as simple structure, less energy consumption, no need to add reagent etc.

Description

Technical Field

[0001] This utility model belongs to the field of wastewater treatment and relates to a sludge treatment device, and more particularly to a sludge cell wall breaking well and a wastewater treatment system. Background Technology

[0002] As a significant byproduct of wastewater treatment, sludge is generated in large quantities as wastewater treatment scales up. Sludge treatment technologies include thickening, conditioning, mechanical dewatering, thermal treatment (incineration, pyrolysis), and anaerobic digestion. Each of these technologies has its own advantages and disadvantages and is suitable for different types of sludge and treatment needs.

[0003] Current sludge cell wall disruption technologies mainly include physical, chemical, and biological methods. Physical methods include mechanical crushing, ultrasonic crushing, and high-pressure water jet crushing. These methods require applying external force (external energy) to break down the aggregates within the sludge, thereby increasing the surface area of ​​the sludge particles to facilitate material exchange and reactions in subsequent treatment processes. Chemical methods involve adding chemical reagents to disrupt the cell walls of the sludge. Commonly used chemical reagents include acids and alkalis. This method can quickly and effectively disrupt cell walls, but the reaction conditions are difficult to control and can produce harmful byproducts. Biological methods utilize specific microorganisms or enzymes to decompose organic matter in the sludge and disrupt cell walls. While this method is relatively environmentally friendly, the processing time is long, and it is only applicable to specific types of sludge, exhibiting strong specificity. Utility Model Content

[0004] This invention provides a sludge cell wall breaking well and a sewage treatment system to overcome the shortcomings of the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: In a first aspect, this utility model provides a sludge cell wall breaking well, including a treatment well, a guide cylinder, and a guide plate; the guide cylinder is disposed inside the treatment well, and there is a space between the cylinder wall and the treatment well where sludge can flow; the guide plate is fixed at the bottom inside the treatment well, located below the guide cylinder; the guide plate is a plate-shaped structure with an inverted V-shaped cross-section, with the tip pointing towards the inside of the guide cylinder, and there is a space between the lower end of the guide cylinder and the guide plate where sludge can flow; the top of the guide cylinder has a sludge inlet, and the top of the space between the guide cylinder and the treatment well has a sludge outlet.

[0006] Furthermore, the depth of the guide tube is not less than 100 m.

[0007] Furthermore, it also includes a negative pressure unit; the negative pressure unit includes a suction pipe and a suction pump; the suction pipe is connected to the sludge outlet; the suction pump is installed on the suction pipe and is used to suction the treated sludge between the guide tube and the treatment well.

[0008] Furthermore, it also includes a bubble unit; the bubble unit includes several bubble tubes and an air compressor; the bubble tubes are located at the bottom of the space between the guide tube and the treatment well, and the tube walls have several bubble holes; the air compressor is connected to several bubble tubes and is used to introduce compressed air into the treated sludge through the bubble tubes and bubble holes.

[0009] Furthermore, the guide plate is conical or pyramidal in shape.

[0010] Furthermore, the tilt angle of the guide plate is 55~60°.

[0011] Furthermore, an outer cylinder that fits into the inner wall and bottom of the treatment well is fixed therewith.

[0012] Furthermore, the guide tube is fixed inside the outer cylinder by several support rods; the inner end of the support rod is fixed to the outer wall of the guide tube, and the outer end is fixed to the inside of the outer cylinder.

[0013] Secondly, this utility model also provides a sewage treatment system, including the sludge cell wall breaking well as described in any one of claims 1 to 8.

[0014] Furthermore, it also includes a screen, a grit chamber, a primary sedimentation tank, a biological treatment tank, a secondary sedimentation tank, and a disinfection tank connected sequentially along the sewage flow direction, as well as sludge thickening equipment and sludge dewatering equipment; the sewage outlets of the primary sedimentation tank, the biological treatment tank, and the secondary sedimentation tank are all connected to the sludge inlet of the sludge cell wall breaking well, and the sludge outlet of the sludge cell wall breaking well is connected sequentially to the sludge thickening equipment and the sludge dewatering equipment.

[0015] The beneficial effects of this utility model are as follows: This utility model provides a sludge cell wall breaking well and a sewage treatment system. The sludge cell wall breaking well relies on the hydrostatic pressure of approximately 1.0 MPa generated at the bottom of the guide tube inside the deep well to physically break down the sludge cells before they enter the sludge thickening equipment. This makes it easier to separate and process the internal organic matter and water, improving the efficiency and effect of subsequent sludge thickening and dewatering, reducing the cost of sludge thickening and dewatering, lowering the moisture content of the final sludge cake, and achieving sludge reduction, stabilization, and harmless treatment. Specifically, by setting a guide plate with an inverted V-shaped cross-section at the bottom of the guide tube, the treated sludge is discharged from the guide tube and then gradually pushed upwards outside the guide tube. At the same time, a negative pressure unit and an air bubble unit can be set to assist in the smooth discharge of the treated sludge. This sludge cell wall breaking well has the advantages of simple structure, low energy consumption, and no need for external reagents. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the sludge cell wall breaking well in Example 1; Figure 2This is a schematic diagram of the wastewater treatment system in Example 2; The labels in the attached diagram are: 1. Treatment well; 2. Flow guide cylinder; 3. Flow guide plate; 4. Sludge inlet; 5. Sludge outlet; 6. Outer cylinder; 61. Support rod; 7. Suction pipe; 8. Bubble tube. Detailed Implementation

[0017] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0018] Example 1 like Figure 1 As shown, this utility model provides a sludge cell wall breaking well, including a treatment well 1, a guide cylinder 2, and a guide plate 3. The guide cylinder 2 is vertically installed inside the treatment well 1, and there is a space between the cylinder wall and the treatment well 1 that allows sludge to flow. The guide plate 3 is fixed to the bottom inside the treatment well 1, located below the guide cylinder 2. The guide plate 3 is a plate-like structure with an inverted V-shaped vertical cross-section, with its tip pointing towards the inside of the guide cylinder 2. There is a space between the lower end of the guide cylinder 2 and the guide plate 3 that allows sludge to flow. The top of the guide cylinder 2 has a sludge inlet 4, and the top of the space between the guide cylinder 2 and the treatment well 1 has a sludge outlet 5.

[0019] The sludge to be treated enters the guide cylinder 2 from the sludge inlet 4 and flows to the bottom by gravity. The pressure generated by the water head pressure at the depth of the guide cylinder 2 squeezes and breaks down the sludge cell walls, thereby achieving cell wall breaking treatment. The treated sludge flows to the space between the guide cylinder 2 and the treatment well 1 under the action of the guide plate 3, and then is gradually pushed to float to the sludge outlet 5 for discharge.

[0020] The depth of the guide tube 2 is not less than 100 m. The water head pressure at a depth of 100 meters can generate a hydrostatic pressure of 1.0 MPa, which can fully break down the cell walls of the sludge.

[0021] The deflector 3 is conical or pyramidal in shape. The tilt angle of the deflector 3 is 55~60°.

[0022] Specifically, an outer cylinder 6 is fixed to the inner wall and bottom of the treatment well 1 to improve the strength of the wall-breaking well and extend its service life. The guide cylinder 2 is fixed inside the outer cylinder 6 by several support rods 61. The inner end of the support rod 61 is fixed to the outer wall of the guide cylinder 2, and the outer end is fixed to the inside of the outer cylinder 6.

[0023] In a preferred embodiment, the wall-breaking well further includes a negative pressure unit. The negative pressure unit includes a suction pipe 7 and a suction pump. The suction pipe 7 is connected to the sludge outlet 5. The suction pump is mounted on the suction pipe 7 and is used to suction the treated sludge between the guide cylinder 2 and the treatment well 1. The wall-breaking well is entirely sealed, and the negative pressure generated by the negative pressure unit suctions and discharges the treated sludge between the guide cylinder 2 and the treatment well 1, thereby facilitating the smooth discharge of the treated sludge.

[0024] In a preferred embodiment, the cell wall breaking well further includes a bubble unit. The bubble unit includes several bubble tubes 8 and an air compressor. The bubble tubes 8 are disposed at the bottom of the space between the guide tube 2 and the treatment well 1, and the tube walls have several bubble holes. The air compressor is connected to both the bubble tubes 8 and is used to introduce compressed air into the treated sludge through the bubble tubes 8 and the bubble holes. The bubbles generated by the compressed air have a certain impact force, which can prevent sludge accumulation to a certain extent, while providing buoyancy to the treated sludge, accelerating the upward flow velocity of the treated sludge in the well, ensuring smooth discharge of the treated sludge and continuous and stable cell wall breaking. Preferably, the bubble hole diameter is 5 mm, and the bubble holes are distributed at a 45° angle.

[0025] Among them, several bubble tubes 8 are evenly distributed at the bottom of the space between the guide tube 2 and the treatment well 1, so as to evenly introduce compressed air and thus better assist the effect.

[0026] Example 2 like Figure 2 As shown, this embodiment provides a wastewater treatment system including a screen, a grit chamber, a primary sedimentation tank, a biological treatment tank, a secondary sedimentation tank, and a disinfection tank, which are connected sequentially by pipes along the wastewater flow direction. It also includes a sludge cell wall breaking well, a sludge thickening device, and a sludge dewatering device as described in Embodiment 1. The discharge outlets of the primary sedimentation tank, the biological treatment tank, and the secondary sedimentation tank are all connected to the sludge inlet 4 of the sludge cell wall breaking well via pipes. The sludge outlet 5 of the sludge cell wall breaking well is sequentially connected to the sludge thickening device and the sludge dewatering device. The sludge thickening device includes a gravity thickening tank, and the sludge dewatering device includes a filter press. The screen, grit chamber, primary sedimentation tank, biological treatment tank, secondary sedimentation tank, disinfection tank, sludge thickening device, and sludge dewatering device are all existing technologies and will not be described in detail here.

[0027] In the system, sludge from the primary sedimentation tank, biological treatment tank, and secondary sedimentation tank flows through pipes into the sludge cell wall breaking well for cell wall breaking. The broken sludge then passes through a sludge thickening device for thickening and a sludge dewatering device for dewatering, ultimately yielding sludge cake. The cell wall breaking treatment makes the sludge settle more easily in the gravity thickening tank due to gravity, resulting in lower moisture content and less sludge volume after pressure filtration and dewatering.

[0028] It should be noted that the terms such as "upper", "lower", "left", "right", "front", and "back" used in this utility model are only for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered as within the scope of implementation of this utility model.

[0029] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A sludge cell wall breaking well, characterized in that: This includes treatment wells, flow guide tubes, and flow guide plates; The guide tube is installed inside the treatment well, and there is a space between the tube wall and the treatment well where sludge can flow; The guide plate is fixed at the bottom of the treatment well, located below the guide cylinder; the guide plate is a plate-shaped structure with an inverted V-shaped cross section, with the tip pointing towards the inside of the guide cylinder, and there is a space between the lower end of the guide cylinder and the guide plate for sludge to flow. The top of the guide tube has a sludge inlet, and the top of the space between the guide tube and the treatment well has a sludge outlet.

2. The sludge cell wall breaking well according to claim 1, characterized in that: The depth of the guide tube is not less than 100 m.

3. The sludge cell wall breaking well according to claim 1, characterized in that: It also includes a negative pressure unit; The negative pressure unit includes a suction tube and a suction pump; The suction pipe is connected to the sludge outlet; The suction pump is installed on the suction pipe and is used to suction the treated sludge between the guide tube and the treatment well.

4. The sludge cell wall breaking well according to claim 1, characterized in that: It also includes bubble units; The bubble unit includes several bubble tubes and an air compressor; The bubble tube is located at the bottom of the space between the guide tube and the treatment well, and the tube wall has a number of bubble holes; The air compressor is connected to several bubble tubes and is used to introduce compressed air into the treated sludge through the bubble tubes and bubble holes.

5. The sludge cell wall breaking well according to claim 1, characterized in that: The guide plate is conical or pyramidal in shape.

6. The sludge cell wall breaking well according to claim 1, characterized in that: The tilt angle of the guide plate is 55~60°.

7. The sludge cell wall breaking well according to claim 1, characterized in that: The inner wall and bottom of the treatment well are fixed with an outer cylinder that fits therein.

8. The sludge cell wall breaking well according to claim 7, characterized in that: The guide tube is fixed inside the outer cylinder by several support rods; the inner end of the support rod is fixed to the outer wall of the guide tube, and the outer end is fixed to the inside of the outer cylinder.

9. A wastewater treatment system, characterized in that: Including the sludge cell wall breaking well as described in any one of claims 1 to 8.

10. The wastewater treatment system according to claim 9, characterized in that: It also includes a screen, a grit chamber, a primary sedimentation tank, a biological treatment tank, a secondary sedimentation tank, and a disinfection tank connected in sequence along the direction of sewage flow, as well as sludge thickening equipment and sludge dewatering equipment; the sewage outlets of the primary sedimentation tank, the biological treatment tank, and the secondary sedimentation tank are all connected to the sludge inlet of the sludge cell wall breaking well, and the sludge outlet of the sludge cell wall breaking well is connected in sequence to the sludge thickening equipment and the sludge dewatering equipment.

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