Belt type sludge dewatering device

Abstract

The present application relates to sludge dewatering equipment technical field, specifically disclose a belt type sludge dewatering device, the dehydration tank is provided with the roller compaction conveyor belt unit and the conveying mesh belt unit parallel to up and down, the roller compaction conveyor belt unit includes movable belt roller and fixed belt roller, the fixed belt roller is rotatably arranged in the dehydration tank, the movable belt roller is movably arranged in the dehydration tank by elastic element, and the movable belt roller and the fixed belt roller are provided with the pressing conveyor belt, the roller compaction mechanism is arranged in the pressing conveyor belt, the roller compaction mechanism includes moving strip and the moving assembly for driving moving strip horizontal movement, the lower portion of moving strip is provided with roller seat, the roller seat is rotatably provided with the pressure roller acting on the lower end of the pressing conveyor belt;The design of the present application on the one hand will not hinder the sludge into the dehydration pressure joint, two aspects can be applied to the sludge by pressing conveyor belt to exert greater pressing force, so that it can be completely dewatered, ensure that the moisture content of the treated sludge is not more than 55%, the use effect is very excellent.

Description

Technical Field

[0001] This invention relates to the field of sludge dewatering equipment technology, and specifically discloses a belt sludge dewatering device. Background Technology

[0002] In the process of sludge resource utilization, it needs to be dewatered and then mixed with additives with corresponding functions. The mixture is then extruded and granulated by a granulator to obtain sludge particles with specific functions. Traditional sludge dewatering devices mainly include screw extrusion dewatering and belt extrusion dewatering. Screw extrusion dewatering devices have shortcomings such as small processing capacity and easy clogging, while belt extrusion dewatering devices have a large processing capacity and no clogging problem, but the extrusion dewatering effect is not good and cannot control the sludge moisture content below 60%.

[0003] For example, invention patent application number 202410077114.X discloses a sludge dewatering device, including a conveying device and a belt filter press. The conveying device includes a shell, a cloth feeder, and a conveying component. The shell has a sludge outlet, which corresponds to the feed section of the belt filter press. The cloth feeder is located at the sludge outlet and covers it. The cloth feeder has multiple through-holes spaced apart. The conveying component is movably located inside the shell and is used to convey the material, so that the sludge in the material passes through the cloth feeder holes and the sludge outlet sequentially. This patent uses a belt filter press to dewater the sludge by compression, and the compression gap between the belt filter press and the conveying device is gradually narrowed, so that the sludge is subjected to gradually increasing pressure as it passes through the compression gap, thereby completing the compression dewatering. However, if the compression pressure of this sludge dewatering device is too high, it will cause the filter belt to deform and fail to provide sufficient compression pressure. Furthermore, when sludge is fed into the compression gaps using a conveying device, insufficient conveying friction causes the sludge to accumulate on the side with the larger gap, preventing it from passing through the compression gaps smoothly and completing effective dewatering. Therefore, to address the aforementioned shortcomings of existing sludge filter press dewatering equipment, this application proposes a belt sludge dewatering device that can effectively solve the above-mentioned technical problems. Summary of the Invention

[0004] The present invention aims to provide a belt sludge dewatering device to solve the shortcomings of existing sludge filter press dewatering equipment, such as poor dewatering effect and easy accumulation at the feed end, which prevents the sludge from entering the extrusion gap for dewatering.

[0005] This invention is achieved through the following technical solution:

[0006] A belt sludge dewatering device includes a dewatering tank, in which a vertically parallel roller conveyor belt unit and a conveyor mesh belt unit are arranged. The roller conveyor belt unit includes a movable belt roller and a fixed belt roller. The fixed belt roller is rotatably arranged in the dewatering tank, and the movable belt roller is horizontally moved in the dewatering tank by an elastic element. A pressing conveyor belt is arranged between the movable belt roller and the fixed belt roller.

[0007] A roller pressing mechanism is provided in the pressing conveyor belt. The roller pressing mechanism includes a moving bar and a moving component that drives the moving bar to move horizontally. A roller seat is provided below the moving bar. A pressure roller that acts on the lower end of the pressing conveyor belt is rotatably installed in the roller seat. A guide connecting block that passes through the moving bar is provided on the roller seat. A shaft is rotatably installed at the upper end of the guide connecting block, and a guide wheel is provided at the end of the shaft. A guide groove plate is fixed on the inner wall of the dewatering tank. A closed-loop guide groove that interacts with the guide wheel is opened on the guide groove plate. The closed-loop guide groove is formed by two parallel straight segments and connecting segments at the left and right ends connected in sequence.

[0008] As a further provision of the above scheme, the conveyor belt unit includes belt rollers rotatably disposed at both ends of the dewatering tank, a dewatering belt with filter cloth laminated on its surface is disposed between the two belt rollers, and a drive device is connected between one of the belt rollers and the fixed belt roller.

[0009] As a further feature of the above scheme, a water receiving trough is provided inside the dewatering mesh belt located below the roller pressing mechanism. The lower end of the water receiving trough is connected to a drain pipe extending out of the dewatering box, and a row of support rollers is rotatably installed at the upper opening of the water receiving trough.

[0010] As a further feature of the above solution, baffles extending upward beyond the upper end of the dewatering mesh belt are provided on both the front and rear side walls of the water receiving tank.

[0011] As a further provision of the above solution, the moving component includes two parallel transmission belts and a pulley shaft for driving the transmission belts, and a moving motor is connected to the end of one of the pulley shafts. The front and rear ends of the moving bar are respectively fixedly connected to the two transmission belts.

[0012] As a further feature of the above solution, the front and rear sides of the dehydration tank are provided with strip-shaped openings aligned with the movable belt roller. A movable block that is slidably connected to the movable belt roller is provided in the strip-shaped opening. The two ends of the elastic element are respectively connected to the movable block and the side end of the strip-shaped opening.

[0013] As a further feature of the above scheme, a sludge inlet and a sludge outlet are respectively provided on the left and right end faces of the dewatering tank. A scraper plate that interacts with the conveyor belt unit is provided on the sludge outlet, and the scraper plate is inclined downward and extends out of the dewatering tank.

[0014] As a further feature of the above scheme, a sedimentation tank and a conveying and draining device are also included. The conveying and draining device is connected to the lower end of the sedimentation tank, and a gate valve is provided at the connection point.

[0015] As a further provision of the above scheme, the conveying and draining device includes an outer shell that is inclined upward, a conveying and draining cylinder that is arranged through the axial direction of the outer shell, an auger blade shaft that is provided inside the conveying and draining cylinder, and an auger motor that is connected to the end of the auger blade shaft. The upper end of the conveying and draining cylinder that extends into the dewatering tank is provided with a mud discharge channel located directly above the conveying mesh belt unit, and a drain pipe is provided at the lower end of the outer shell.

[0016] When the belt sludge dewatering device disclosed in this invention is in operation, sludge with a high water content can first be put into a sedimentation tank and an appropriate amount of flocculant or precipitant can be added to make it settle quickly. Then, the sludge at the bottom of the sedimentation tank is conveyed upward into the dewatering tank by the conveying and dewatering device. During the conveying process, the water in the sedimented sludge is filtered and removed by the conveying and dewatering cylinder, and then falls into the conveying mesh belt unit.

[0017] Subsequently, under the action of the conveyor belt unit, the sludge is moved towards one side of the roller conveyor belt unit, so that the sludge enters the dewatering and pressing gap formed by the two. During the entry process, the sludge is pre-pressed by the combined action of the dewatering belt and the pressing conveyor belt, so that the sludge will not accumulate at the feed end and the material can be pre-pressed evenly.

[0018] Next, stop the operation of the dewatering mesh belt and the pressing conveyor belt, start the roller pressing mechanism, and the moving bar moves from left to right. During the movement, the guide wheel interacts with the lower straight section in the closed-loop guide groove, so that the pressure roller presses down the pressing conveyor belt, reduces the gap of the dewatering pressure seam, and completes the full squeezing and dewatering of the sludge during the pressing movement. When the moving bar moves to the end and is guided by the connecting section, it enters the upper straight section, and then moves back to the reset along the upper straight section.

[0019] After secondary pressing and dewatering by the roller pressing mechanism, the dewatering mesh belt is restarted to send the sludge to the sludge outlet, where it is scraped off by the scraper. At the same time, the next batch of pre-pressed sludge enters the roller pressing mechanism to wait for the next pressing and dewatering.

[0020] Compared with existing technologies, it has the following beneficial effects:

[0021] This invention changes the structure of existing belt filter press devices. First, a conveyor belt unit sends the sludge to the dewatering gaps with larger spacing for pre-pressing and dewatering, forming a uniformly spread sludge layer. Then, a roller pressing mechanism acts on the pressing conveyor belt, making the gaps in the dewatering gaps smaller. As the gaps narrow, the roller press moves along the conveying direction, thus completing the pressing and dewatering of the sludge. This structure and dewatering operation design do not hinder the sludge from entering the dewatering gaps, and the pressing conveyor belt can apply greater pressure to the sludge, ensuring complete dewatering and guaranteeing that the moisture content of the treated sludge does not exceed 55%, resulting in excellent performance.

[0022] The present invention also enables the sludge to settle effectively through the matching design of the sedimentation tank and the conveying and draining device. It can also effectively drain the sludge during the conveying process before dewatering, so as to effectively control the sludge moisture content before dewatering and prevent the sludge from flowing down from the front and back sides of the dewatering mesh belt due to its low viscosity when it is conveyed by the dewatering mesh belt, thus ensuring the subsequent pressing and dewatering effect. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the overall external three-dimensional structure of the present invention;

[0025] Figure 2 This is a three-dimensional structural diagram of the interior of the dehydration tank in this invention;

[0026] Figure 3 This is a three-dimensional structural diagram of the sedimentation tank and the conveying and draining device in this invention;

[0027] Figure 4 This is a three-dimensional structural diagram of the roller-pressed conveyor belt unit, conveyor mesh belt unit, etc. in this invention;

[0028] Figure 5 This is a three-dimensional structural diagram of the water receiving tank in this invention;

[0029] Figure 6 This is a three-dimensional structural diagram of the roller pressing mechanism in this invention;

[0030] Figure 7 For the present invention Figure 1 A magnified structural diagram of point A in the middle. Detailed Implementation

[0031] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0032] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The following will refer to the appendix... Figures 1-7 This application will be described in detail with reference to the embodiments. Example 1

[0033] Example 1 discloses a belt sludge dewatering device, see attached drawing. Figure 1 and attached Figure 2 The system includes a dewatering tank 1, within which are arranged parallel roller conveyor belt units 3 and conveyor mesh belt units 2, with a dewatering gap of approximately 5 cm between them. The conveyor mesh belt unit 2 includes mesh belt rollers 201 positioned at both ends of the dewatering tank 1, and a dewatering mesh belt 202 positioned between the two mesh belt rollers 201. The outer surface of the dewatering mesh belt 202 is coated with a layer of filter cloth (not shown in the figure), allowing internal water to pass through the filter cloth while the sludge is retained during compression. Furthermore, a sludge inlet 101 is located on the left end face of the dewatering tank 1, and a sludge outlet 102 is located on the right end face. A scraper 103, which interacts with the right end of the dewatering mesh belt 202, is installed on the sludge outlet 102, extending downwards from the dewatering tank 1.

[0034] Reference Appendix Figure 4 Appendix Figure 5 and attached Figure 7 The roller conveyor unit 3 includes a movable roller 301 and a fixed roller 302 disposed in the dewatering tank 1. A pressing conveyor belt 303 is disposed between the movable roller 301 and the fixed roller 302. The left end of the dewatering mesh belt 202 is longer than the pressing conveyor belt 303, so that after the sludge is fed from the sludge inlet 101, it can fall directly onto the upper surface of the dewatering mesh belt 202 and then be conveyed by the dewatering mesh belt 202 to the dewatering press seam. The fixed roller 302 is vertically aligned with the right end of the mesh roller 201, and the roller ends of both are connected to a drive device 4. The drive device 4 consists of a gearbox, a pair of meshing gears, and a motor. The motor shaft is connected to one of the gears, and the roller ends of the fixed roller 302 and the mesh roller 201 are respectively meshed with the two gears, so that the fixed roller 302 and the mesh roller 201 can rotate synchronously in opposite directions under the drive of the motor.

[0035] On both the front and rear sides of the dehydration tank 1, there are strip-shaped openings 104 aligned with the front and rear of the movable belt roller 301. A movable block 304 that can move horizontally is slidably installed in the strip-shaped opening 104. Then, a bearing connected to the roller end of the movable belt roller 301 is installed in the movable block 304. Finally, a spring 305 is connected between the movable block 304 and the end wall of the strip-shaped opening 104. Through the above design, the movable belt roller 301 can move slightly along the strip-shaped opening 104, thereby realizing the self-adjustment of the tension of the pressing conveyor belt 303 and keeping it in a taut state.

[0036] A water receiving trough 5 is provided inside the middle section of the dewatering mesh belt 202, and baffles 501 extending upwards and blocking the dewatering mesh belt 202 are provided at both ends of the water receiving trough 5 to prevent sludge from falling from the front and rear sides during the dewatering process. A row of support rollers 502 that act on the dewatering mesh belt 202 are rotatably arranged in the water receiving trough 5. A drain pipe 503 extending out of the dewatering box 1 is connected to the lower end of the water receiving trough 5. Finally, a roller pressing mechanism 6 is provided inside the pressing conveyor belt 303 directly above the water receiving trough 5.

[0037] Reference Appendix Figure 6 The roller pressing mechanism 6 includes a moving component 601 and a moving bar 602. The moving component 601 can be either a belt conveyor or a screw drive. In this embodiment, the moving component 601 is a belt conveyor, including two parallel drive belts 6011 and a pulley shaft 6012. A moving motor 6013 is connected to the end of one of the pulley shafts 6012. The moving bar 602 is set perpendicular to the conveying direction of the pressing conveyor belt 303, and its front and rear ends are fixedly connected to the two drive belts 6011 respectively. A roller seat 603 is provided below the moving bar 602, and a pressure roller 604 is rotatably arranged in the roller seat 603, so that the pressure roller 604 can act on the lower end of the pressing conveyor belt 303, thereby reducing the dewatering gap and squeezing and dewatering the internal sludge.

[0038] Guide connecting blocks 605, which pass through the moving strip 602, are connected to both the front and rear ends of the roller seat 603. A bearing seat 606 is provided at the upper end of each guide connecting block 605, and a shaft 607 is rotatably mounted between the two bearing seats 605. Guide wheels 608 are provided at both the front and rear ends of the shaft 607. Guide groove plates 609 are provided on both the front and rear inner walls of the dewatering tank 1. Closed-loop guide grooves 610, which interact with the guide wheels 608, are formed on the opposite sides of the two guide groove plates 609. Each closed-loop guide groove 610 includes a vertically parallel straight section 6101 and connecting sections 6102 at the left and right ends. The connecting sections 6102 are used to connect the two straight sections 6101 synchronously, allowing the guide wheels 608 to switch their vertical paths after moving to the connecting sections 6102, thereby ultimately changing the vertical position of the pressure roller 604.

[0039] When the belt sludge dewatering device disclosed in Embodiment 1 is running, the sludge is put onto the upper surface of the left end of the dewatering mesh belt 202 and then conveyed to the right until it enters the dewatering pressure gap between the dewatering mesh belt 202 and the pressing conveyor belt 303. During the conveying process, the sludge is pre-pressed, which serves two purposes: pre-dewatering and evenly spreading the sludge on the surface of the dewatering mesh belt 202.

[0040] When the sludge moves to position 6 of the roller pressing mechanism, the moving component 601 is activated, causing the moving bar 602 to move from left to right. During this movement, the guide wheel 608 interacts with the lower straight section 6101 of the closed-loop guide groove 610, causing the pressure roller 604 to press down the conveyor belt 303, reducing the gap in the dewatering pressure seam, and completing the full compression and dewatering of the sludge during the pressing movement. When the moving bar 602 moves to the end and is guided by the connecting section 6102, it enters the upper straight section 6101, and then moves back to its original position along the upper straight section 6101.

[0041] Finally, start the dewatering conveyor belt 202 to transport the sludge that has been fully squeezed and dewatered to the far right end, where it will be scraped by the scraper 103 and discharged from the dewatering tank 1. Example 2

[0042] Example 2 discloses a belt sludge dewatering device that is further improved based on the technical solution in Example 1. The similarities between it and Example 1 will not be described again.

[0043] Reference Appendix Figure 1 and attached Figure 3In this embodiment 2, a sedimentation tank 7 is also provided on the left side of the dewatering tank 1. A conveying and draining device 8 extends from the lower end of the sedimentation tank 7 into the dewatering tank 1 along the sludge inlet 101. A bracket 9 is provided at the left end of the dewatering tank 1, and the sedimentation tank 7 is fixedly installed on the upper end of the bracket 9. A sewage inlet pipe 701 and a static water outlet pipe 702 are provided on the upper end of the outer circular surface of the sedimentation tank 7. At the same time, a corresponding stirring assembly 703 is provided in the sedimentation tank 7, and a flocculant dosing hopper 704 is provided at the upper end of the sedimentation tank 7.

[0044] The conveying and dewatering device 8 includes an upwardly inclined outer shell 801. A conveying and dewatering cylinder 802, with both ends penetrating the outer shell 801, is arranged along its axial direction. The lower end of the conveying and dewatering cylinder 802 is connected to the lower end of the sedimentation tank 7, and a corresponding gate valve 705 is provided at the connection point. An auger blade shaft 803 is installed inside the conveying and dewatering cylinder 802, and an auger motor 804 is connected to the lower end of the auger blade shaft 803. Finally, a drain pipe 805 is provided at the lower end of the outer shell 801, and a sludge discharge channel 806 is provided at the upper end of the conveying and dewatering cylinder 802, located directly above the left end of the dewatering mesh belt 202.

[0045] The belt sludge dewatering device disclosed in this patent, when in operation, sends sludge liquid with high water content to sedimentation tank 7, adds an appropriate amount of flocculant, stirs and settles, and then discharges the settled sludge into conveying drain cylinder 802. Under the action of auger blade shaft 803, the sludge is conveyed upward along conveying drain cylinder 802. During the conveying process, water and fine impurities are discharged through the drain holes on conveying drain cylinder 802, while a large amount of sludge falls onto dewatering mesh belt 202 through sludge discharge channel 806, and is then conveyed by dewatering mesh belt 202 to dewatering pressure seam for roller dewatering.

[0046] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A belt conveyor for sludge dewatering, comprising a dewatering tank, wherein the dewatering tank is provided with a vertically parallel roller conveyor belt unit and a conveyor mesh belt unit, characterized in that, The roller press conveyor belt unit includes a movable belt roller and a fixed belt roller. The fixed belt roller is rotatably mounted in the dewatering box, and the movable belt roller is horizontally mounted in the dewatering box through an elastic element. A pressing conveyor belt is provided between the movable belt roller and the fixed belt roller. A roller pressing mechanism is provided in the pressing conveyor belt. The roller pressing mechanism includes a moving bar and a moving component that drives the moving bar to move horizontally. A roller seat is provided below the moving bar. A pressure roller that acts on the lower end of the pressing conveyor belt is rotatably installed in the roller seat. A guide connecting block that passes through the moving bar is provided on the roller seat. A shaft is rotatably installed at the upper end of the guide connecting block, and a guide wheel is provided at the end of the shaft. A guide groove plate is fixed on the inner wall of the dewatering tank. A closed-loop guide groove that interacts with the guide wheel is opened on the guide groove plate. The closed-loop guide groove is formed by two parallel straight segments and connecting segments at the left and right ends connected in sequence.

2. The belt sludge dewatering device according to claim 1, characterized in that, The conveyor belt unit includes belt rollers rotatably mounted at both ends of the dewatering tank. A dewatering belt with a filter cloth laminated on its surface is disposed between the two belt rollers, and a drive device is connected between one of the belt rollers and the fixed belt roller.

3. The belt sludge dewatering device according to claim 2, characterized in that, A water receiving trough is provided inside the dewatering mesh belt located below the roller pressing mechanism. The lower end of the water receiving trough is connected to a drain pipe extending out of the dewatering box, and a row of support rollers is rotatably installed at the upper opening of the water receiving trough.

4. The belt sludge dewatering device according to claim 3, characterized in that, Both the front and rear side walls of the water receiving tank are provided with baffles extending upwards beyond the top of the dewatering mesh belt.

5. The belt sludge dewatering device according to claim 1, characterized in that, The moving component includes two parallel drive belts and a pulley shaft for driving the drive belts, with a moving motor connected to the end of one of the pulley shafts, and the front and rear ends of the moving bar are fixedly connected to the two drive belts respectively.

6. The belt sludge dewatering device according to claim 1, characterized in that, The front and rear sides of the dehydration tank are provided with strip-shaped openings aligned with the movable belt roller. A movable block that is slidably connected to the movable belt roller is rotatably disposed in the strip-shaped opening. The two ends of the elastic element are respectively connected to the movable block and the side end of the strip-shaped opening.

7. The belt sludge dewatering device according to claim 1, characterized in that, The dewatering tank has a sludge inlet and a sludge outlet on its left and right end faces, respectively. The sludge outlet is equipped with a scraper that interacts with the conveyor belt unit, and the scraper extends downwards out of the dewatering tank.

8. The belt sludge dewatering device according to claim 1, characterized in that, It also includes a sedimentation tank and a conveying and draining device, wherein the conveying and draining device is connected to the lower end of the sedimentation tank and a gate valve is provided at the connection.

9. The belt sludge dewatering device according to claim 8, characterized in that, The conveying and draining device includes an inclined upward outer shell, a conveying and draining cylinder extending through the axial direction of the outer shell, an auger blade shaft inside the conveying and draining cylinder, and an auger motor connected to the end of the auger blade shaft. The upper end of the conveying and draining cylinder extending into the dewatering tank is provided with a mud discharge channel located directly above the conveying mesh belt unit, and a drain pipe is provided at the lower end of the outer shell.

Images