Sludge low-temperature drying mechanism

Abstract

The utility model relates to a sludge low-temperature drying mechanism which comprises a box body, a conveying mesh belt, a dust filtering bag, a static pressure box, an exhaust fan and an electric heater, and a group of driving roller components, a plurality of groups of driven roller components and a group of tensioning roller components are arranged on the box body. The sludge overturning device has the beneficial effects that the conveying mesh belt is tensioned in the box body through the matching of the driving roller assembly, the driven roller assembly and the tensioning roller assembly, the middle part of the conveying mesh belt is guided by the driven roller assembly to form a plurality of Z-shaped sludge overturning structures, and when the sludge encounters the sludge overturning structures on the conveying mesh belt, the sludge falls onto the lower conveying mesh belt from the upper conveying mesh belt, so that the sludge overturning effect is greatly improved. In the falling process, the sludge is overturned and split, and the original form is changed, so that the sludge is uniformly heated.

Description

Technical Field

[0001] This utility model relates to the field of sludge treatment, and in particular to a sludge low-temperature drying mechanism. Background Technology

[0002] Wastewater treatment generates a large amount of residual sludge. In recent years, in order to reduce the land occupation caused by sludge and to realize the utilization of sludge resources, drying equipment has been used to dry the sludge before it is transported to a soil processing plant to be processed into soil.

[0003] Currently, belt-type hot air dryers are commonly used in my country's sludge drying industry. A patent application (application number 202010828648.3) discloses a multi-stage low-temperature sludge drying device and method that couples internal and external heat and mass transfer. Based on the kinetic characteristics of low-temperature sludge drying, the sludge drying process is divided into four stages. Air volume and temperature are rationally allocated according to the sludge moisture content and drying characteristics at different stages. A tempering section is added between the first and second deceleration drying stages to homogenize the heat on the sludge surface and inside during drying, matching the internal and external moisture migration rates, saving energy, and improving drying efficiency.

[0004] However, the sludge is in a relatively static state on the conveyor belt, which prevents the sludge from turning over and being heated evenly. Utility Model Content

[0005] The purpose of this invention is to overcome the above-mentioned problems in the existing technology and provide a sludge low-temperature drying mechanism.

[0006] To achieve the above-mentioned technical objectives and effects, this utility model is implemented through the following technical solution:

[0007] A sludge low-temperature drying device, comprising:

[0008] The housing is equipped with a set of drive roller assemblies, multiple sets of driven roller assemblies, and a set of tension roller assemblies.

[0009] The conveyor belt is tensioned in the housing by a drive roller assembly, a driven roller assembly, and a tension roller assembly. The middle part of the conveyor belt is guided by the driven roller assembly to form multiple "Z"-shaped mud-turning structures.

[0010] The dust filter bag is installed in the air extraction slot at the rear of the housing.

[0011] A static pressure box is installed on the inner front side of the box body, and the air outlet of the static pressure box faces the rear of the box body;

[0012] The exhaust fan has an air inlet connector that is connected to the air outlet pipe at the bottom of the exhaust tank via a first pipe, and an air outlet connector that is connected to the air inlet pipe of the static pressure box via a second pipe.

[0013] An electric heater is installed at the air outlet of the static pressure box.

[0014] The box body has a feeding hopper at the top front, with the feeding port facing the conveyor belt, and the width of the feeding hopper is smaller than the width of the conveyor belt.

[0015] The bottom of the box is provided with a dry mud outlet and a wet mud outlet. The dry mud outlet is located below the unloading end of the conveyor belt, and the wet mud outlet is located in front of the dry mud outlet.

[0016] The bottom of the box is provided with a wet mud guide plate that slopes downward from front to back and a dry mud guide plate that slopes downward from front to back. The rear end of the wet mud guide plate is connected to the wet mud outlet, and the rear end of the dry mud guide plate is connected to the dry mud outlet.

[0017] The box is equipped with multiple evenly distributed T-shaped frames, and each T-shaped frame is equipped with a herringbone-shaped guide plate, which is located above the lower section of the conveyor belt.

[0018] The conveyor belt includes a rubber side ring, a stainless steel mesh belt layer, and a filter cloth layer. The two sides of the stainless steel mesh belt layer are respectively fixed in the rubber side ring, and the filter cloth layer is installed on the outer surface of the stainless steel mesh belt layer.

[0019] The drive roller assembly includes two first bearing seats, two first ball bearings, and a drive roller. The first bearing seats are bolted to the outside of the housing, and one first ball bearing is installed in each first bearing seat. The two ends of the drive roller are respectively fitted into the inner rings of the two first ball bearings.

[0020] The driven roller assembly includes two second bearing seats, two second ball bearings, and a driven roller. The second bearing seats are bolted to the outside of the housing, and one second ball bearing is installed in each second bearing seat. The two ends of the driven roller are respectively fitted into the inner rings of the two second ball bearings.

[0021] The tension roller assembly includes two pairs of slide rails, two sliders, two third ball bearings, a tension roller, a support block, and a compression spring. The slide rails are bolted to the outside of the housing. A slider is slidably installed in each pair of slide rails. A bearing mounting groove is provided in the center of each slider, and a third ball bearing is installed in each bearing mounting groove. The two ends of the tension roller are respectively fitted into the inner rings of the two third ball bearings. The support block is bolted to the slide rails, and the compression spring is sandwiched between the support block and the slider. A strip hole is provided on the side of the housing between each pair of slide rails for the tension roller to pass through. Baffles are provided on the front and rear sides of the slider to block the strip hole.

[0022] The beneficial effects of this utility model are as follows: the conveyor belt is tensioned in the box by the cooperation of the drive roller assembly, the driven roller assembly and the tension roller assembly. The middle part of the conveyor belt is guided by the driven roller assembly to form multiple "Z"-shaped sludge turning structures. When the sludge encounters the sludge turning structure on the conveyor belt, the sludge falls from the upper conveyor belt to the lower conveyor belt. During the falling process, the sludge undergoes tumbling and splitting, changing its original shape and enabling the sludge to be heated evenly. Attached Figure Description

[0023] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0024] Figure 1 This is a first-view structural schematic diagram of the sludge low-temperature drying mechanism in this utility model;

[0025] Figure 2 This is a second-view structural schematic diagram of the sludge low-temperature drying mechanism in this utility model;

[0026] Figure 3 This is a schematic diagram of the internal structure of one side of the sludge low-temperature drying mechanism after disassembly.

[0027] Figure 4 This is a schematic diagram of the air extraction groove in this utility model;

[0028] Figure 5 This is a schematic diagram of the structure of the conveyor belt in this utility model, which is tensioned by the cooperation of a drive roller assembly, a driven roller assembly, and a tension roller assembly;

[0029] Figure 6 This is a schematic diagram of the drive roller assembly in this utility model;

[0030] Figure 7 This is a schematic diagram of the driven roller assembly in this utility model;

[0031] Figure 8 This is a schematic diagram of the tension roller assembly in this utility model;

[0032] Figure 9 This is a schematic diagram of the structure of the box in this utility model;

[0033] Figure 10 This is a cross-sectional view of the conveyor belt in this utility model;

[0034] Explanation of the numbers in the diagram: Box 1, Air extraction trough 101, Feed hopper 102, Dry mud outlet 103, Wet mud outlet 104, Wet mud guide plate 105, Dry mud guide plate 106, First circular hole 107, Second circular hole 108, Strip hole 109, Drive roller assembly 2, First bearing seat 201, First ball bearing 202, Drive roller 203, Driven roller assembly 3, Second bearing seat 301, Second ball bearing 302, Driven roller 303, Tensioner Roller assembly 4, slide rail 401, slider 402, bearing mounting groove 4021, third ball bearing 403, tension roller 404, support block 405, compression spring 406, baffle 407, conveyor belt 5, mud turning structure 501, rubber edge ring 502, stainless steel mesh belt layer 503, filter cloth layer 504, dust filter bag 6, static pressure box 7, exhaust fan 8, electric heater 9, first pipe 10, second pipe 11, T-shaped frame 12, guide plate 13. Detailed Implementation

[0035] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0036] like Figures 1 to 10 As shown, a sludge low-temperature drying mechanism includes a housing 1, a conveyor belt 5, a dust filter bag 6, a static pressure box 7, an exhaust fan 8, and an electric heater 9.

[0037] The housing 1 is equipped with a set of drive roller assembly 2, multiple sets of driven roller assemblies 3, and a set of tension roller assembly 4, specifically:

[0038] The drive roller assembly 2 includes two first bearing seats 201, two first ball bearings 202, and a drive roller 203. The first bearing seats 201 are bolted to the outside of the housing 1. Each first bearing seat 201 is equipped with a first ball bearing 202. The two ends of the drive roller 203 are respectively fitted into the inner rings of the two first ball bearings 202. The side of the housing 1 is provided with a first circular hole 107 for the drive roller 203 to pass through.

[0039] One end of the drive roller 203 is connected to a servo motor (not shown in the figure) for driving the drive roller to rotate via a coupling.

[0040] The driven roller assembly 3 includes two second bearing seats 301, two second ball bearings 302, and a driven roller 303. The second bearing seats 301 are bolted to the outside of the housing 1. Each second bearing seat 301 is fitted with a second ball bearing 302. The two ends of the driven roller 303 are respectively fitted into the inner rings of the two second ball bearings 302. The side of the housing 1 is provided with a second circular hole 108 for the driven roller 303 to pass through.

[0041] The tension roller assembly 4 includes two pairs of slide rails 401, two sliders 402, two third ball bearings 403, a tension roller 404, a support block 405, and a compression spring 406. The slide rails 401 are bolted to the outside of the housing 1. A slider 402 is slidably installed in each pair of slide rails 401. A bearing mounting groove 4021 is opened in the center of the slider 402. A third ball bearing 403 is installed in each bearing mounting groove 4021. The two ends of the tension roller 404 are respectively fitted into the inner rings of the two third ball bearings 403. The support block 405 is bolted to the slide rails 402. The compression spring 406 is sandwiched between the support block 405 and the slider 402. A strip hole 109 is opened on the side of the housing 1 between each pair of slide rails 401 for the tension roller 404 to pass through. Baffles 407 for blocking the strip hole 109 are respectively provided on the front and rear sides of the slider 402.

[0042] The compression spring 406 applies a forward thrust to the slider 402, which drives the tensioning roller to tension the conveyor belt 5.

[0043] The conveyor belt 5 is tensioned in the housing 1 by the cooperation of the drive roller assembly 2, the driven roller assembly 3 and the tension roller assembly 4. The middle part of the conveyor belt 5 is guided by the driven roller assembly 3 to form multiple "Z"-shaped mud-turning structures 501.

[0044] The conveyor belt 5 includes a rubber sash 502, a stainless steel mesh belt layer 503, and a filter cloth layer 504. Both sides of the stainless steel mesh belt layer 503 are fixed to the rubber sash 502, and the filter cloth layer 504 is mounted on the outer surface of the stainless steel mesh belt layer 503. The stainless steel mesh belt layer 503 provides rigid support to the filter cloth layer 504, preventing severe deformation or damage to the filter cloth layer under the impact of sludge. The rubber sash 502, on the one hand, prevents the edges of the stainless steel mesh belt layer 503 from causing wear to the drive roller 203, driven roller 303, and tension roller 404; on the other hand, it increases the friction between the conveyor belt 5 and the drive roller 203, driven roller 303, and tension roller 404, preventing slippage during operation.

[0045] An air extraction slot 101 is provided at the rear of the housing 1, and a dust filter bag 6 is installed in the air extraction slot 101; a static pressure box 7 is installed on the inner side of the front of the housing 1, and the air outlet of the static pressure box 7 faces the rear of the housing 1; the air inlet of the exhaust fan 8 is connected to the air outlet pipe at the bottom of the air extraction slot 101 through the first pipe 10, and the air outlet of the exhaust fan 8 is connected to the air inlet pipe of the static pressure box 7 through the second pipe 11.

[0046] An electric heater 9 is installed at the air outlet of the static pressure box 7, and the electric heater 9 heats the airflow blown out of the static pressure box 7.

[0047] A feed hopper 102 is provided at the top front of the housing 1. The discharge port of the feed hopper 102 faces the conveyor belt 5. The width of the feed hopper 102 is smaller than the width of the conveyor belt 5, and the feed hopper 102 is located in the middle above the conveyor belt 5 to ensure that the sludge in the feed hopper 102 can fall onto the conveyor belt 5.

[0048] The bottom of the housing 1 is provided with a dry mud outlet 103 and a wet mud outlet 104. The dry mud outlet 103 is located below the unloading end of the conveyor belt 5, and the wet mud outlet 104 is located in front of the dry mud outlet 103. The bottom of the housing 1 is provided with a wet mud guide plate 105 that slopes downward from front to back and a dry mud guide plate 106 that slopes downward from front to back. The rear end of the wet mud guide plate 105 is connected to the wet mud outlet 104, and the rear end of the dry mud guide plate 106 is connected to the dry mud outlet 103. The wet sludge falling onto the wet mud outlet 104 flows along the wet mud guide plate 105 into the wet mud outlet 104 and is discharged. The dry sludge falling onto the dry mud guide plate 106 flows along the dry mud guide plate 106 into the dry mud outlet 103 and is discharged.

[0049] Multiple evenly distributed T-shaped frames 12 are installed in the housing 1. A herringbone-shaped guide plate 13 is installed on the T-shaped frame 12. The guide plate 13 is located above the lower section of the conveyor belt 5 to prevent wet mud flowing out from the upper section of the conveyor belt 5 from falling onto the inner side of the conveyor belt 5.

[0050] Working principle:

[0051] The servo motor drives the drive roller to rotate, which in turn drives the conveyor belt. The sludge falls from the feed hopper onto the conveyor belt and is conveyed from front to back. When the sludge encounters the sludge turning structure, it falls from the upper conveyor belt to the lower conveyor belt. During the falling process, the sludge turns and splits, changing its original shape and allowing it to be heated evenly. When the sludge is conveyed to the discharge end of the conveyor belt, it falls into the dry sludge outlet.

[0052] While the conveyor belt is running, the exhaust fan operates to send the gas in the box back into the box through the exhaust trough, the first pipe, the second pipe, and the static pressure box. At the same time, the electric heater operates to heat the airflow blown out of the static pressure box, so that the gas sent back into the box is hot air, which dries the sludge.

[0053] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A sludge low-temperature drying mechanism, characterized in that, include: The housing is equipped with a set of drive roller assemblies, multiple sets of driven roller assemblies, and a set of tension roller assemblies. The conveyor belt is tensioned in the housing by a drive roller assembly, a driven roller assembly, and a tension roller assembly. The middle part of the conveyor belt is guided by the driven roller assembly to form multiple "Z"-shaped mud-turning structures. The dust filter bag is installed in the air extraction slot at the rear of the housing. A static pressure box is installed on the inner front side of the box body, and the air outlet of the static pressure box faces the rear of the box body; The exhaust fan has an air inlet connector that is connected to the air outlet pipe at the bottom of the exhaust tank via a first pipe, and an air outlet connector that is connected to the air inlet pipe of the static pressure box via a second pipe. An electric heater is installed at the air outlet of the static pressure box.

2. The sludge low-temperature drying mechanism according to claim 1, characterized in that: A feeding hopper is provided at the top front of the box body, with the discharge port of the feeding hopper facing the conveyor belt, and the width of the feeding hopper being smaller than the width of the conveyor belt.

3. The sludge low-temperature drying mechanism according to claim 1, characterized in that: The bottom of the box is provided with a dry mud outlet and a wet mud outlet. The dry mud outlet is located below the unloading end of the conveyor belt, and the wet mud outlet is located in front of the dry mud outlet.

4. The sludge low-temperature drying mechanism according to claim 1, characterized in that: The bottom of the box is provided with a wet mud guide plate that slopes downward from front to back and a dry mud guide plate that slopes downward from front to back. The rear end of the wet mud guide plate is connected to the wet mud outlet, and the rear end of the dry mud guide plate is connected to the dry mud outlet.

5. The sludge low-temperature drying mechanism according to claim 1, characterized in that: The housing is equipped with multiple evenly distributed T-shaped frames, each with a herringbone-shaped guide plate positioned above the lower section of the conveyor belt.

6. The sludge low-temperature drying mechanism according to claim 1, characterized in that: The conveyor belt includes a rubber side ring, a stainless steel mesh belt layer, and a filter cloth layer. The two sides of the stainless steel mesh belt layer are respectively fixed in the rubber side ring, and the filter cloth layer is installed on the outer surface of the stainless steel mesh belt layer.

7. The sludge low-temperature drying mechanism according to claim 1, characterized in that: The drive roller assembly includes two first bearing housings, two first ball bearings, and a drive roller. The first bearing housings are bolted to the outside of the housing, and one first ball bearing is installed in each first bearing housing. The two ends of the drive roller are respectively fitted into the inner rings of the two first ball bearings.

8. The sludge low-temperature drying mechanism according to claim 1, characterized in that: The driven roller assembly includes two second bearing seats, two second ball bearings, and a driven roller. The second bearing seats are bolted to the outside of the housing, and one second ball bearing is installed in each second bearing seat. The two ends of the driven roller are respectively fitted into the inner rings of the two second ball bearings.

9. The sludge low-temperature drying mechanism according to claim 1, characterized in that: The tension roller assembly includes two pairs of slide rails, two sliders, two third ball bearings, a tension roller, a support block, and a compression spring. The slide rails are bolted to the outside of the housing. A slider is slidably installed in each pair of slide rails. A bearing mounting groove is provided in the center of each slider, and a third ball bearing is installed in each bearing mounting groove. The two ends of the tension roller are respectively fitted into the inner rings of the two third ball bearings. The support block is bolted to the slide rails, and the compression spring is sandwiched between the support block and the slider. A strip hole is provided on the side of the housing between each pair of slide rails for the tension roller to pass through. Baffles are provided on the front and rear sides of the slider to block the strip hole.

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