Sludge treatment device

Abstract

The utility model discloses a sludge treatment device, which belongs to the technical field of sludge treatment and comprises an impurity screening part, a gravel screening part, a bottom mud screening part and a mud-water separation part, the sundry screening part comprises a feeding hopper and a sundry intercepting mechanism, and the sundry intercepting mechanism comprises a screening grid and a sundry conveying mechanism; the gravel screening part comprises a gravel settling chamber, the gravel settling chamber comprises a muddy water area and a gravel area, the muddy water area is communicated with the feeding hopper, a muddy water extraction mechanism is arranged in the muddy water area, and a gravel delivery mechanism is arranged in the gravel area; the gravel screening part comprises a bottom mud settling chamber, the bottom mud settling chamber comprises a settling area and a drainage area, a water distributor and an inclined tube matrix are arranged in the settling area, a bottom mud conveying mechanism is arranged in the settling area, and an overflow port is formed in the drainage area; the mud-water separation part comprises a mud inlet, a mud outlet and a water outlet, and the water outlet is communicated with the water drainage area. Impurities and sand grains in sludge can be screened out, sludge-water separation is carried out on the sludge, the water content and the sand content of discharged sludge are reduced, and the fine silt content in discharged water is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of sludge treatment, in particular to a sludge treatment device. Background Art

[0002] Sludge is a product of urban development, and its treatment and disposal is an important part of regional ecological balance. Urban sludge generally refers to the sludge discharged from sewage treatment plants and the sludge deposited in urban drainage pipes. The sediments dredged and fished out during the maintenance of drainage pipes are commonly known as ditch sludge. With the improvement of urbanization, the output of ditch sludge has increased year by year. The sediments in the pipes include particulate matter and impurities from domestic sewage and industrial wastewater entering the pipeline transportation system, as well as road dust, garbage, and mud discharged from some construction sites, and other debris, such as branches, plastic bags, cloth pieces, stones, fibers, animal carcasses, discarded bottles, boxes, etc. If not cleaned in time, it is easy to reduce the transportation function of the drainage pipes, causing poor drainage, causing water accumulation and sewage overflow, and the silt deposited in the pipes will enter the river with rainwater on rainy days, causing water pollution. Utility Model Content

[0003] The purpose of the utility model is to solve the above-mentioned technical problems and provide a sludge treatment device, which can screen out debris and sand in the sludge, separate the sludge from water, reduce the water content and sand content of the sludge, and reduce the amount of fine mud in the effluent water, so as to reduce the pressure on the back-end sewage treatment facilities and solve the problem of ultra-fine sand deposition in the collection tank.

[0004] To achieve the above-mentioned purpose, the utility model provides the following scheme: The utility model discloses a sludge treatment device, including a debris screening part, a gravel screening part, a bottom mud screening part and a mud-water separation part;

[0005] The debris screening part includes a feed hopper and a debris interception mechanism, wherein the debris interception mechanism includes a screening grid located on a material falling path in the feed hopper and a debris conveying mechanism for conveying the falling material above the screening grid to the outside;

[0006] The gravel screening part comprises a gravel settling chamber, the gravel settling chamber comprises a muddy water area and a gravel area connected up and down, the top of the muddy water area is connected to the feed hopper, the bottom of the muddy water area is provided with a muddy water extraction mechanism for extracting muddy water, and the bottom of the gravel area is provided with a gravel delivery mechanism for delivering the settled gravel outward;

[0007] The gravel screening part includes a sedimentation chamber, and the sedimentation chamber includes a sedimentation area and a drainage area separated horizontally. A water distributor and an inclined tube matrix are provided in the sedimentation area. The water distributor is located above the inclined tube matrix. The liquid inlet end of the water distributor is connected with the muddy water extraction mechanism. The water inlet of the inclined tube matrix faces the liquid outlet end of the water distributor, and the water outlet of the inclined tube matrix faces the bottom of the sedimentation area. A sediment conveying mechanism for discharging the sediment precipitated in the muddy water is provided at the bottom of the sedimentation area, and an overflow port is provided in the drainage area.

[0008] The mud-water separation part comprises a mud inlet, a mud outlet and a water outlet, the mud inlet is communicated with the bottom mud conveying mechanism, and the water outlet is communicated with the drainage area.

[0009] Preferably, the debris conveying mechanism includes an interception box which is obliquely inserted into the feed hopper, the screening grid is embedded in the bottom plate of the interception box, a drop port is provided on the top plate of the interception box and is located above the screening grid, the drop port is connected to the feed hopper, a circulating lifting chain plate is provided in the interception box, and a discharge port is provided on the end of the interception box extending out of the feed hopper.

[0010] Preferably, the muddy water extraction mechanism comprises a water pump and a water pump installed on the water pump, the liquid inlet end of the water pump is connected to the muddy water area, and the liquid outlet end of the water pump is connected to the liquid inlet end of the water distributor.

[0011] Preferably, the gravel conveying mechanism comprises a conveying screw installed at the bottom of the gravel area and a lifting screw for lifting the gravel conveyed by the conveying screw out of the gravel area, the conveying screw is arranged horizontally, and the lifting screw is arranged obliquely.

[0012] Preferably, the cross section of the grit settling chamber perpendicular to the axial direction of the conveying screw is an inverted trapezoid.

[0013] Preferably, a liquid level sensor is provided in the muddy water area.

[0014] Preferably, the bottom mud conveying mechanism comprises a mud pumping pipe and a mud pump installed on the mud pumping pipe, the liquid inlet end of the mud pumping pipe is connected to the bottom of the sedimentation area, and the liquid outlet end of the mud pumping pipe is connected to the mud-water separation part.

[0015] Preferably, the bottom of the sedimentation chamber is connected to a plurality of conical mud discharge buckets, and the bottom of the mud discharge bucket is connected to the liquid inlet end of the mud suction pipe.

[0016] Preferably, a material sensor is provided in the mud discharge bucket.

[0017] Preferably, the mud-water separation part comprises a laminated spiral sludge dewatering machine, and a drainage port of the laminated spiral sludge dewatering machine is connected to the drainage area.

[0018] Compared with the prior art, the utility model has achieved the following technical effects:

[0019] The sludge treatment device of the utility model can screen out debris and sand particles in the sludge, separate the sludge from water, reduce the water content and sand content of the sludge, and reduce the amount of fine mud in the effluent water, so as to reduce the pressure on the back-end sewage treatment facilities, solve the problem of ultra-fine sand deposition and collection pools, ease the cleaning work of the sewage pump station pipe network, and reduce the water consumption for cleaning the sewage pump station pipe network. The device can be used for urban sludge treatment, especially ditch sludge, and can also be used for sludge treatment in other areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a three-dimensional structural schematic diagram of a sludge treatment device;

[0022] Figure 2 It is a schematic diagram of the main structure of the sludge treatment device;

[0023] Figure 3 is a cross-sectional view of a sludge treatment device;

[0024] Figure 4 This is the internal structure diagram of the debris interception mechanism;

[0025] Figure 5 This is the internal structure diagram of the sludge treatment device;

[0026] Figure 6 Schematic diagram of the three-dimensional structure of the oblique tube matrix;

[0027] Figure 7 for Figure 4 A partial enlarged view of .

[0028] Explanation of the reference numerals in the accompanying drawings: 1. Feed hopper; 2. Gravel settling chamber; 3. Bottom mud settling chamber; 4. Overflow port; 5. Water distributor; 6. Inclined tube matrix; 7. Intercepting box; 8. Screening grid; 9. Lifting chain plate; 10. Discharge port; 11. Suction pipe; 12. Suction pump; 13. Conveying screw; 14. Lifting screw; 15. Sand discharge port; 16. Liquid level sensor; 17. Mud suction pipe; 18. Mud suction pump; 19. Mud discharge hopper; 20. Material sensor; 21. Laminated spiral sludge dewatering machine; 22. Mud discharge port; 23. Rake teeth. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] This embodiment provides a sludge treatment device, such as Figures 1 to 7 As shown, it includes a debris screening section, a gravel screening section, a bottom mud screening section and a mud-water separation section.

[0031] The debris screening part includes a feed hopper 1 and a debris intercepting mechanism, and the debris intercepting mechanism includes a screening grid 8 and a debris conveying mechanism. The screening grid 8 is located on the material falling path in the feed hopper 1, that is, between the feed port and the discharge port of the feed hopper 1, and is used to filter the sludge falling from the feed hopper 1, intercept the large pieces of debris in the sludge, and only allow the sludge and small-sized sand particles to pass through. The debris conveying mechanism is used to convey the intercepted falling material (i.e., large pieces of debris) above the screening grid 8 out of the feed hopper 1. Large pieces of debris include branches, plastic bags, pieces of cloth, stones, fibers, animal carcasses, discarded bottles, boxes, etc.

[0032] The gravel screening section includes a gravel settling chamber 2, which includes a muddy water area and a gravel area. The muddy water area and the gravel area are distributed up and down and connected to each other up and down. The top of the muddy water area is connected to the discharge port of the feed hopper 1. The sludge in the feed hopper 1 that has been screened by the screening grid 8 is discharged into the gravel settling chamber 2 from the discharge port of the feed hopper 1. Gravel and other heavy objects with a large specific gravity will be deposited in the gravel area, while water and fine mud suspended in the water will accumulate in the muddy water area. A muddy water extraction mechanism is provided at the bottom of the muddy water area to extract the muddy water accumulated in the muddy water area. A gravel delivery mechanism is provided at the bottom of the gravel area to deliver the gravel settled in the gravel area out of the gravel settling chamber 2.

[0033] The gravel screening part includes a sedimentation chamber 3, which includes a sedimentation area and a drainage area, and the sedimentation area and the drainage area are separated in the horizontal direction. A water distributor 5 and an inclined tube matrix 6 are provided in the sedimentation area, and the water distributor 5 is located above the inclined tube matrix 6. The liquid inlet end of the water distributor 5 is connected with the mud and water extraction mechanism, the water inlet of the inclined tube matrix 6 faces the liquid outlet end of the water distributor 5, and the water outlet of the inclined tube matrix 6 faces the bottom of the sedimentation chamber 3. The mud and water extracted by the mud and water extraction mechanism will be sent into the water distributor 5, and then flow into the water inlet at the top of the inclined tube matrix 6 from the liquid outlet end of the water distributor 5, and then flow out from the bottom outlet of the inclined tube matrix 6, and the mud in the mud and water will be deposited at the bottom of the sedimentation area. A sediment conveying mechanism is provided at the bottom of the sedimentation area, which is used to discharge the sediment precipitated in the mud and water to the mud and water separation part, and separate the water and the sediment through the mud and water separation part. An overflow port 4 is provided in the drainage area.

[0034] The mud-water separation part includes a mud inlet, a mud outlet 22 and a drainage port. The mud inlet is connected to the bottom mud conveying mechanism, and the drainage port is connected to the drainage area. The mud-water separation part discharges the mud at the separation point through the mud outlet 22, and the water at the separation point is discharged into the drainage area through the drainage port, and then discharged from the overflow port 4 of the drainage area. The discharged water can be sent to the regulating tank for subsequent treatment.

[0035] In this embodiment, Figures 1 to 7 As shown, the debris conveying mechanism includes an interception box 7. A drop port is provided on the top plate of the interception box 7, and a screening grille 8 is embedded on the bottom plate of the interception box 7, and the drop port is located above the screening grille 8. The interception box 7 is inserted into the feed hopper 1 at an angle, and the drop port is located in communication with the feed hopper 1. During the falling process of the sludge entering the feed port 1, it will fall on the screening grille 8 through the drop port, and the debris will remain above the screening grille 8, while the sludge will fall through the screening grille 8 and fall into the gravel settling chamber 2 from the discharge port of the feed hopper 1. A circulating lifting chain plate 9 is provided in the interception box 7, and the lifting chain plate 9 continuously transports the debris on the screening grille 8 online, and then the debris is discharged from the discharge port 10 at one end of the interception box 7 extending out of the feed hopper.

[0036] Further, in this embodiment, Figures 1 to 7 As shown, the lifting chain plate 9 is composed of a chain and a scraper. The chain circulates to drive the scraper to lift the debris.

[0037] Further, in this embodiment, Figures 1 to 7 As shown, the screening grid 8 is composed of a plurality of strip plates, which form a plurality of strip gaps, through which the sludge leaks. The corresponding scraper can be provided with rake teeth 23 that match the strip gaps, which can significantly improve the efficiency of lifting debris.

[0038] In this embodiment, Figures 1 to 7As shown, the mud and water extraction mechanism includes a water suction pipe 11 and a water pump 12. The liquid inlet end of the water suction pipe 11 is connected to the mud and water area of ​​the gravel settling chamber 2, and the liquid outlet end of the water suction pipe 11 is connected to the liquid inlet end of the water distributor 5. The water pump 12 is installed on the water suction pipe 11 to provide suction force for the water suction pipe 11 to pump the mud and water in the mud and water area into the water distributor 5.

[0039] Further, in this embodiment, Figures 1 to 7 As shown, the gravel conveying mechanism includes a conveying screw 13 and a lifting screw 14. The conveying screw 13 is horizontally installed at the bottom of the gravel area and is used to convey the settled sand to the lifting screw 14. The lifting screw 14 is inclined and can lift the sand conveyed by the conveying screw 13 to its top and then discharge it from the sand discharge port 15 at the top.

[0040] Further, in this embodiment, Figures 1 to 7 As shown, the cross section of the grit settling chamber 2 perpendicular to the axial direction of the conveying screw 13 is an inverted trapezoid, so that the two sides of the grit settling chamber 2 have two inclined surfaces, and the two inclined surfaces can buffer the filtered sludge discharged from the feed hopper 1.

[0041] Further, in this embodiment, Figures 1 to 7 As shown, a liquid level sensor 16 is provided in the muddy and water area. When the water in the muddy and water area reaches the liquid level sensor 16, the muddy and water extraction mechanism and the gravel conveying mechanism will automatically start.

[0042] In this embodiment, Figures 1 to 7 As shown, the bottom mud conveying mechanism includes a mud pumping pipe 17 and a mud pump 18. The liquid inlet end of the mud pumping pipe 17 is connected to the bottom of the sedimentation area of ​​the bottom mud sedimentation chamber 3, and the liquid outlet end of the mud pumping pipe 17 is connected to the mud-water separation part. The mud pump 18 is installed on the mud pumping pipe 17 to provide suction force for the mud pumping pipe 17 to pump the bottom mud in the sedimentation area of ​​the bottom mud sedimentation chamber 3 into the mud-water separation part.

[0043] Further, in this embodiment, Figures 1 to 7 As shown, the bottom of the sedimentation area of ​​the bottom sedimentation chamber 3 is connected to a plurality of conical mud discharge buckets 19 , and the bottom of the mud discharge bucket 19 is connected to the liquid inlet end of the mud suction pipe 17 .

[0044] Further, in this embodiment, Figures 1 to 7 As shown, a material sensor 20 is provided in the mud discharge bucket 19 .

[0045] In this embodiment, Figures 1 to 7As shown, the mud-water separation part includes a laminated spiral sludge dewatering machine 21. In the laminated spiral sludge dewatering machine 21, multiple rings are covered on the spiral shaft, and the rings are divided into two types: fixed rings and movable rings. The fixed rings and the movable rings are spaced apart from each other and have a certain filtering gap. During the rotation of the spiral shaft, the movable rings and the fixed ring rings will rub and squeeze the material to squeeze out the water, and the water will flow out from the gap between the fixed rings and the movable rings. The mud will be pushed forward with the rotation of the spiral shaft, and then reach the upward inclined and spiral-free extrusion section. Most of the water in the bottom mud is removed through the extrusion of the spiral, and then the mud is discharged from the mud discharge port 22 at the top, and the treated water is discharged through the overflow port 4 for subsequent treatment.

[0046] Furthermore, in the present embodiment, the gravel settling chamber 2 and the sludge settling chamber 3 are located in the same main box body, the feed hopper 1 is installed at one end of the main box body, the feed hopper 1 is close to the top of the gravel settling chamber 2, the lifting screw 14 is inclined and extends to the other end of the main box body, the laminated spiral sludge dewatering machine 21 is installed on the top of the main box body, the overflow port 4 is installed at the end of the main box body away from the feed hopper 1, and the water pump 12 and the mud pump 18 are both located below the main box body to form an integrated sludge treatment device.

[0047] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A sludge treatment device, characterized in that: It includes debris screening section, gravel screening section, bottom mud screening section and mud-water separation section; The debris screening part includes a feed hopper and a debris interception mechanism, wherein the debris interception mechanism includes a screening grid located on a material falling path in the feed hopper and a debris conveying mechanism for conveying the falling material above the screening grid to the outside; The gravel screening part comprises a gravel settling chamber, the gravel settling chamber comprises a muddy water area and a gravel area connected up and down, the top of the muddy water area is connected to the feed hopper, the bottom of the muddy water area is provided with a muddy water extraction mechanism for extracting muddy water, and the bottom of the gravel area is provided with a gravel delivery mechanism for delivering the settled gravel outward; The gravel screening part includes a sedimentation chamber, and the sedimentation chamber includes a sedimentation area and a drainage area separated horizontally. A water distributor and an inclined tube matrix are provided in the sedimentation area. The water distributor is located above the inclined tube matrix. The liquid inlet end of the water distributor is connected with the muddy water extraction mechanism. The water inlet of the inclined tube matrix faces the liquid outlet end of the water distributor, and the water outlet of the inclined tube matrix faces the bottom of the sedimentation area. A sediment conveying mechanism for discharging the sediment precipitated in the muddy water is provided at the bottom of the sedimentation area, and an overflow port is provided in the drainage area. The mud-water separation part comprises a mud inlet, a mud outlet and a water outlet, the mud inlet is communicated with the bottom mud conveying mechanism, and the water outlet is communicated with the drainage area.

2. A sludge treatment device according to claim 1, characterized in that: The debris conveying mechanism includes an interception box which is obliquely inserted into the feed hopper, the screening grid is embedded in the bottom plate of the interception box, and a drop port is provided on the top plate of the interception box above the screening grid. The drop port is connected to the feed hopper, a circulating lifting chain plate is provided in the interception box, and a discharge port is provided on one end of the interception box extending out of the feed hopper.

3. A sludge treatment device according to claim 1, characterized in that: The muddy water extraction mechanism comprises a water pump and a water pump installed on the water pump. The liquid inlet end of the water pump is connected to the muddy water area, and the liquid outlet end of the water pump is connected to the liquid inlet end of the water distributor.

4. A sludge treatment device according to claim 3, characterized in that: The gravel conveying mechanism comprises a conveying screw installed at the bottom of the gravel area and a lifting screw used to lift the gravel conveyed by the conveying screw out of the gravel area. The conveying screw is arranged horizontally, and the lifting screw is arranged obliquely.

5. A sludge treatment device according to claim 4, characterized in that: The cross section of the gravel settling chamber perpendicular to the axial direction of the conveying screw is an inverted trapezoid.

6. A sludge treatment device according to claim 4, characterized in that: A liquid level sensor is arranged in the muddy water area.

7. A sludge treatment device according to claim 1, characterized in that: The bottom mud conveying mechanism comprises a mud pumping pipe and a mud pump installed on the mud pumping pipe, the liquid inlet end of the mud pumping pipe is connected to the bottom of the sedimentation area, and the liquid outlet end of the mud pumping pipe is connected to the mud-water separation part.

8. A sludge treatment device according to claim 7, characterized in that: The bottom of the sedimentation chamber is connected with a plurality of conical mud discharge buckets, and the bottom of the mud discharge bucket is connected with the liquid inlet end of the mud pumping pipe.

9. A sludge treatment device according to claim 8, characterized in that: A material sensor is arranged in the mud discharge bucket.

10. A sludge treatment device according to claim 1, characterized in that: The mud-water separation part comprises a laminated spiral sludge dewatering machine, and a drainage port of the laminated spiral sludge dewatering machine is communicated with the drainage area.

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