Spatial multi-layer ultrahigh-pressure belt type dewatering system and dewatering method

Abstract

A spatial multi-layer ultrahigh-pressure belt type dewatering system and a dewatering method. The dewatering system comprises a main frame (1), a material distribution and feeding device (2), a material distribution device (3), filter belts (4), a filter belt tractor (5), a hydraulic filter press (6), a hydraulic station (7) and a controller (8); the filter belts (4) comprise an upper filter belt (41) and a lower filter belt (42) separately wound on the filter belt tractor (5); the hydraulic filter press (6) comprises filter pressing plates (64), the filter pressing plates (64) comprising an upper filter pressing plate (641), middle filter pressing plates (642) and a lower filter pressing plate (643); lifting / lowering linkage rings (65) are provided between the upper filter pressing plate (641) and the middle filter pressing plates (642), and the upper filter belt (41) and the lower filter belt (42) pass between the upper filter pressing plate (641), the middle filter pressing plates (642) and the lower filter pressing plate (643).

Description

Space Multilayer Ultra-High Pressure Belt Dehydration System and Dehydration Method Technical Field

[0001] This invention belongs to the field of mechanical and physical dehydration technology of organic waste, specifically relating to a spatial multi-layer ultra-high pressure belt dehydration system and dehydration method. Background Technology

[0002] Most organic waste generated in social production and daily life has a moisture content of 70% to 80% or higher. To effectively manage and utilize organic waste, turning it into a valuable resource, dehydration is crucial to minimizing its moisture content. Mechanical dehydration is one of the most common and efficient dehydration techniques. Common mechanical equipment used for organic waste dehydration includes belt filter presses, plate and frame filter presses, screw presses, centrifuges, and vacuum filters. Because plate and frame filter presses can dehydrate most high-moisture organic waste to 60% moisture content, and even some to below 50%, they are increasingly used in the dehydration of municipal sludge, cassava starch residue, and sugar refining filter mud.

[0003] However, given the new demands for lower moisture content, lower dewatering costs, and greater waste reduction, plate and frame filter presses cannot adequately meet these requirements for dewatering organic waste, mainly in the following aspects:

[0004] First, it is not possible to directly feed non-fluid organic waste with a moisture content of less than 85% into the dewatering process. Instead, water must be added to the organic waste first to dilute it to a fluid content of 90% or even 95% or more before it can be pumped into the dewatering process. This results in a greater amount of wastewater, which does not meet the requirements of "pollution reduction and volume reduction".

[0005] Secondly, the dewatering efficiency is low, often requiring 4 to 6 hours for a single dewatering cycle; thirdly, before dewatering municipal sludge and other organic wastes, it is necessary to add and stir more agents such as polyferric chloride, which increases the dry basis of the waste and the treatment cost, and significantly increases the iron content in the sludge, which is not conducive to the resource utilization of fertilizer.

[0006] Fourth, it is impossible to dehydrate organic waste to a moisture content of 50% or even below 40% in a short period of time and with high efficiency, resulting in high costs for subsequent environmental treatment and resource utilization.

[0007] Fifth, the filter cake is relatively thick, which makes subsequent fermentation, drying and crushing extremely difficult and increases processing costs.

[0008] In view of the shortcomings of the existing technology, the inventors, through continuous research, design, and repeated trial production and improvement, have finally created this invention with practical value.

[0009] Summary of the Invention

[0010] The purpose of this invention is to overcome the defects of existing technologies and provide a novel spatial multilayer ultra-high pressure belt dehydration system and dehydration method. This system solves the current technical challenge of achieving higher efficiency and lower cost dehydration in the environmental treatment and resource utilization of high-moisture organic waste, providing technical support for continuously improving the level of environmental treatment and resource utilization of organic waste, and thus making it more suitable for practical use.

[0011] Another objective of this invention is to overcome the shortcomings of existing technologies and provide a new type of spatial multilayer ultra-high pressure belt dewatering system and dewatering method. The technical problem to be solved is to make it an organic waste dewatering device with higher dewatering efficiency, lower cost, and greater "pollution reduction and carbon reduction", thus making it more suitable for practical use.

[0012] The objective of this invention and the technical problem it solves are achieved by the following technical solution. A spatial multi-layer ultra-high pressure belt dewatering system according to this invention includes a main frame, a feeding device, a feeding device, a filter belt, a filter belt traction machine, a filter press hydraulic press, a hydraulic station, and a controller; the feeding device, the feeding device, the filter belt traction machine, and the filter press hydraulic press are connected and installed on the main frame; the output end of the feeding device is connected and installed above the feeding device.

[0013] The filter belt includes an upper filter belt and a lower filter belt, which are respectively wound on a belt traction machine;

[0014] The filter press hydraulic press is connected to the hydraulic station via hydraulic oil pipes; the material feeding device, material feeding device, filter belt traction machine, filter press hydraulic press, hydraulic station and controller are electrically connected.

[0015] The filter press hydraulic press includes a filter cylinder, a filter cylinder base, a filter slide, a filter plate, a lifting linkage ring, filter guide columns, and a filter worktable; the filter worktable is connected and installed directly above the main frame; the filter guide columns are connected from top to bottom between the filter cylinder base, the filter slide, the filter plate, and the filter worktable; the filter cylinder is connected and installed on the filter cylinder base; the upper end face of the filter slide is connected and installed on the piston rod of the filter cylinder;

[0016] The filter press includes an upper filter press, a middle filter press, and a lower filter press. The upper filter press is connected and installed on the lower end face of the filter press slide, the lower filter press is connected and installed on the upper part of the filter press worktable, and the middle filter press is connected and installed on the filter press guide column between the upper and lower filter presses. A lifting linkage ring is provided between the upper and middle filter presses, and the upper and lower filter belts pass through the upper, middle, and lower filter presses.

[0017] Furthermore, the filter plate has water guide grooves on its upper and lower surfaces; a porous filter plate panel is installed above the water guide grooves; and a filter plate outlet pipe is connected to the end face of the water guide grooves.

[0018] Furthermore, it also includes a filter press water-absorbing pad; the filter press water-absorbing pad is connected and installed on the surface of the porous panel of the filter plate.

[0019] Furthermore, the filter press is installed in series with one or more units.

[0020] Furthermore, it also includes a material blocking mechanism; the material blocking mechanism includes a material blocking bar and a material blocking cylinder; the material blocking bar is connected and installed on the piston rod of the material blocking cylinder, and the material blocking bar is located on both sides in the running direction of the filter plate and the filter belt; the material blocking cylinder is connected to the hydraulic station through an oil pipe.

[0021] Furthermore, a vacuum negative pressure device is connected and installed on the water outlet pipe of the filter plate.

[0022] Furthermore, it also includes a filter belt guiding mechanism, which is connected to the main frame installed on both sides of the filter belt.

[0023] Furthermore, the material feeding device is a belt feeder, screw feeder, screw pump feeder, or plunger pump feeder; the material spreading device is a belt spreading machine or screw spreading machine, and the output end of the material spreading device is located on the lower filter belt at the lower position of the filter belt traction machine.

[0024] Furthermore, it also includes a material crushing device; the material crushing device is connected and installed below the discharge end of the filter belt traction machine;

[0025] The material crushing device is a screw conveyor or twin-shaft shredder, chain crusher, or hammer / blade crusher.

[0026] Furthermore, it also includes a material dosing and mixing device; the material dosing and mixing device is connected and installed at the front end of the fabric feeding device.

[0027] The objective of this invention and the technical problem it solves are further achieved by the following technical solution. A dehydration method using a spatial multi-layer ultra-high pressure belt dehydration system, according to this invention, includes the following steps:

[0028] S1: Start the equipment. Start the multi-layer ultra-high pressure belt dewatering system through the controller, so that the feeding device, feeding device, filter belt traction machine and hydraulic station are in the start-up standby state.

[0029] S2: Material feeding. The controller controls the material feeding device to feed material to the material feeding device. The material feeding device and the filter belt traction machine operate simultaneously. The material feeding device lays the filter press material onto the lower filter belt running on the filter belt traction machine. When the filter belt traction machine pulls the lower filter belt to move one filter press station length in the direction of the filter press hydraulic press, the material feeding device stops running. At the same time, the filter belt traction machine pulls the upper filter belt and the lower filter belt to move synchronously in the direction of the filter press hydraulic press or downward, and clamps the filter press material in the middle to convey it to the filter press station of the lower filter plate and the middle filter plate or the upper filter plate and the middle filter plate.

[0030] S3: Filtration and Dewatering. When the filter belt traction machine pulls the upper and lower filter belts, carrying the filter material layer, to the center position of the filter press station of the lower and middle filter plates, the controller controls the filter press hydraulic press to perform a downward pressing action. The filter press slide table drives the upper and middle filter plates to press vertically downwards simultaneously until the pressure of the filter press cylinder acts on the filter material layer sandwiched by the upper and lower filter belts and the lower filter plate. Under the pressure of the filter press cylinder, the water in the filter material flows out to the surface and passes through the filter press cylinder separately and sequentially. The material is discharged through the upper and lower filter belts, the porous panel of the filter plate, the water guide groove, and the filter plate outlet pipe. When the first layer of filter material is pressed at the first filter station for the set time, the hydraulic station depressurizes the filter press, stops the filtration, and causes the filter press to move upward. The filter slide moves the upper and middle filter plates upward, releasing the upper and lower filter belts and the filter material layer within them. The belt feeder and filter belt traction machine restart and continue moving towards the filter press, repeating the above steps. The first filter material layer is pulled upward by the belt traction machine and filter belt to the center position of the second filter press station formed by the filter plates. The second filter material layer is simultaneously pulled and transported to the center position of the filter press station of the lower and middle filter plates. The filter press hydraulic press performs a second downward pressing action. The filter press slide drives the upper, middle and lower filter plates to interact and perform filter dewatering on the first and second filter material layers as described above until the set time. The hydraulic station, the filter press hydraulic press, the belt traction machine and the filter belt traction machine repeat the above actions to complete the distribution of the third filter material layer and transport the third filter material layer to the first filter press station. The second filter material layer is simultaneously transported to the second filter press station and the first filter material layer is transported to the third filter press station. Or, if the set number of filter presses and the total filter press time have been reached, the filter material layer is transported by the filter belt traction machine and filter belt to be unloaded.

[0031] S4: Unloading. When the first material layer completes the set number of filter presses, it is conveyed upward or downward by the filter belt traction machine and the filter belt away from the filter press station between the upper filter plate and the middle filter plate or between the middle filter plate and the lower filter plate. The upper filter belt and the lower filter belt separate, and the first material layer is pressed into material sheets. During the operation of the filter belt, the material is unloaded from between the upper filter belt and the lower filter belt respectively, thus completing the unloading. This cycle is repeated, and the system completes the filter press and dewatering of one material layer after another, realizing the filter press and dewatering function.

[0032] Furthermore, it includes the following steps:

[0033] S1: Start the equipment. Start the multi-layer ultra-high pressure belt dewatering system through the controller, so that the feeding device, feeding device, filter belt traction machine and hydraulic station are in the start-up standby state.

[0034] S2: Material feeding. The controller controls the material feeding device to feed material to the material feeding device. The material feeding device and the filter belt traction machine operate simultaneously. The material feeding device lays the filter press material onto the lower filter belt running on the filter belt traction machine. When the filter belt traction machine pulls the lower filter belt to move one filter press station length in the direction of the filter press hydraulic press, the material feeding device stops running. At the same time, the filter belt traction machine pulls the upper filter belt and the lower filter belt to move synchronously in the direction of the filter press hydraulic press or downward, and clamps the filter press material in the middle to convey it to the filter press station of the lower filter plate and the middle filter plate or the upper filter plate and the middle filter plate.

[0035] S3: Filtration and Dewatering. When the filter belt traction machine pulls the upper and lower filter belts, carrying the filter material layer, to the center position of the filter press station of the lower and middle filter plates, the controller controls the filter press hydraulic press to perform a downward pressing action. The filter press slide table drives the upper and middle filter plates to press vertically downwards simultaneously until the pressure of the filter press cylinder acts on the filter material layer sandwiched by the upper and lower filter belts and the lower filter plate. Under the pressure of the filter press cylinder, the water in the filter material flows out to the surface and passes through the filter press cylinder separately and sequentially. The material is discharged through the upper and lower filter belts, the porous panel of the filter plate, the water guide groove, and the filter plate outlet pipe. When the first layer of filter material is pressed at the first filter station for the set time, the hydraulic station depressurizes the filter press, stops the filtration, and causes the filter press to move upward. The filter slide moves the upper and middle filter plates upward, releasing the upper and lower filter belts and the filter material layer within them. The belt feeder and filter belt traction machine restart and continue moving towards the filter press, repeating the above steps. The first filter material layer is pulled upward by the belt traction machine and filter belt to the center position of the second filter press station formed by the filter plates. The second filter material layer is simultaneously pulled and transported to the center position of the filter press station of the lower and middle filter plates. The filter press hydraulic press performs a second downward pressing action. The filter press slide drives the upper, middle and lower filter plates to interact and perform filter dewatering on the first and second filter material layers as described above until the set time. The hydraulic station, the filter press hydraulic press, the belt traction machine and the filter belt traction machine repeat the above actions to complete the distribution of the third filter material layer and transport the third filter material layer to the first filter press station. The second filter material layer is simultaneously transported to the second filter press station and the first filter material layer is transported to the third filter press station. Or, if the set number of filter presses and the total filter press time have been reached, the filter material layer is transported by the filter belt traction machine and filter belt to be unloaded.

[0036] S4: Unloading. When the first material layer completes the set number of filter presses, it is conveyed upward or downward by the filter belt traction machine and the filter belt away from the filter press station between the upper filter plate and the middle filter plate or between the middle filter plate and the lower filter plate. The upper filter belt and the lower filter belt separate, and the first material layer is pressed into material sheets. During the operation of the filter belt, the material is unloaded from between the upper filter belt and the lower filter belt respectively, thus completing the unloading. This cycle is repeated, and the system completes the filter press and dewatering of one material layer after another, realizing the filter press and dewatering function.

[0037] Furthermore, when there are two or more filter presses in S3, the pressure applied to the filter material by the filter presses from the material feeding device onwards gradually increases. That is, when the material is dewatered by filter press, when the filter material enters the first filter press, it is pre-pressed with a low pressure, and then the pressure is gradually increased by each filter press to achieve a better dewatering effect.

[0038] In S3, the baffle mechanisms located on both sides of the filter press move downward to press the filter belt downward, and then the filter press squeezes the filter material downward.

[0039] In S3, the moisture in the filter press material flows out of the surface under pressure and passes through the upper filter belt, filter belt and filter plate water absorption pad, filter plate porous panel, water guide groove and filter plate water outlet pipe respectively and sequentially to be discharged.

[0040] When a vacuum negative pressure device is connected to the water outlet pipe of the filter plate in S3, the water in the water guide groove of the filter plate is sucked out through the vacuum negative pressure device when the hydraulic press of the filter press squeezes the filter material.

[0041] This invention has significant advantages and beneficial effects compared with the prior art. It has at least the following advantages:

[0042] 1. This invention can directly feed and dehydrate non-fluid organic waste with a moisture content of less than 85%, without the need to dilute the organic waste with water, and without increasing the amount of wastewater, which is more in line with the guiding requirements of "pollution reduction and volume reduction";

[0043] 2. This invention uses multiple hydraulic presses to gradually increase the dewatering rate by applying pressure to the material, thus making the dewatering efficiency higher. It can dewater common organic wastes such as municipal sludge, papermaking sludge, fecal sludge, and cassava starch residue with a moisture content of about 80% to less than 50% in each filter press cycle, which only takes 2 to 5 minutes, shortening the time by more than 90% compared to plate and frame filter presses.

[0044] 3. Before dewatering municipal sludge and other organic wastes, the present invention requires less dosage of ferric chloride and other chemicals, or even none at all. After dewatering, the dry weight of the waste increases less or not at all, which is more conducive to subsequent fertilizer resource utilization.

[0045] 4. The organic waste filter cake after dehydration produced by this invention is relatively thin, generally only 3-5mm thick, compared to 20-40mm thick for plate and frame filter presses. This makes subsequent fermentation, drying, and crushing processing easier and reduces processing costs.

[0046] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings.

[0047] Brief description of the attached figures

[0048] Figure 1 is a front view schematic diagram of the structure of Embodiment 1 of the present invention.

[0049] Figure 2 is a front view schematic diagram of the hydraulic filter press according to Embodiment 1 of the present invention.

[0050] Figure 3 is a partial axial cross-sectional view of the medium-pressure filter plate of Embodiment 1 of the present invention.

[0051] Figure 4 is a front view schematic diagram of the structure of Embodiment 2 of the present invention.

[0052] Figure 5 is a partial axial cross-sectional view of the medium-pressure filter plate of Embodiment 2 of the present invention.

[0053] Figure 6 is a front view schematic diagram of the structure of Embodiment 3 of the present invention.

[0054] Figure 7 is a partial axial cross-sectional view of the medium-pressure filter plate of Embodiment 3 of the present invention.

[0055] Figure 8 is a front view schematic diagram of the structure of Embodiment 4 of the present invention.

[0056] Figure 9 is a front view schematic diagram of the structure of Embodiment 5 of the present invention.

[0057] in:

[0058] Symbol Explanation: 1: Main frame; 2: Fabric feeding device; 21: Belt feeder; 22: Screw feeder; 23: Screw pump feeder; 24: Plunger pump feeder; 3: Fabric feeding device; 31: Belt feeder; 32: Screw feeder; 4: Filter belt; 41: Upper filter belt; 42: Lower filter belt; 5: Filter belt traction machine; 6: Hydraulic filter press; 61: Filter press cylinder; 62: Filter press cylinder seat; 63: Filter press slide; 64: Filter plate; 641: Upper filter plate; 642: The medium-pressure filter plate 643; the lower-pressure filter plate 644; the filter plate water guide groove 645; the filter plate porous panel 646; the filter plate water absorption pad 647; the filter plate water outlet pipe 65; the lifting linkage ring 66; the filter press guide column 67; the filter press worktable 7; the hydraulic station 8; the controller 9; the material blocking mechanism 91; the material blocking pressure bar 92; the material blocking cylinder 10; the vacuum negative pressure device 11; the filter belt guiding mechanism 12; the material crushing device 13; the material dosing and stirring device

[0059] The best way to realize an invention

[0060] To further illustrate the technical means and effects adopted by the present invention to achieve the intended purpose, the following detailed description, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation, structure, features, and effects of the spatial multilayer ultra-high pressure belt dehydration system and dehydration method proposed according to the present invention.

[0061] Example 1:

[0062] Please refer to Figures 1, 2, and 3. The spatial multi-layer ultra-high pressure belt dewatering system of Embodiment 1 of the present invention mainly consists of a main frame 1, a feeding device 2, a feeding device 3, a filter belt 4, a filter belt traction machine 5, a filter press hydraulic press 6, a hydraulic station 7, and a controller 8. The feeding device 2, the feeding device 3, the filter belt traction machine 5, and the filter press hydraulic press 6 are connected and installed on the main frame 1.

[0063] The fabric feeding device 2 is connected and installed on the main frame 1, and the output end of the fabric feeding device 3 is located above the lower filter belt 42;

[0064] The material feeding device 2 is a belt feeder 21, the output end of which is connected and installed above the material feeding device 3; the filter belt includes an upper filter belt 41 and a lower filter belt 42, which are respectively wound around the filter belt traction machine 5; the material feeding device 3 is a belt material feeder 31, which is connected and installed on the main frame 1 at the lower position of the lower filter belt traction machine 52 and above the lower filter belt 42; the filter press hydraulic press 6 is connected to the hydraulic station 7 through hydraulic oil pipes; the material feeding device 2, the material feeding device 3, the filter belt traction machine 5, the filter press hydraulic press 6, the hydraulic station 7 are electrically connected to the controller 8;

[0065] The filter press 6 includes a filter cylinder 61, a filter cylinder seat 62, a filter slide 63, a filter plate 64, a lifting linkage ring 65, a filter guide column 66, and a filter worktable 67. The filter worktable 67 is connected and installed directly above the main frame 1. The filter guide column 66 is connected from top to bottom between the filter cylinder seat 62, the filter slide 63, the filter plate 64, and the filter worktable 67. The filter cylinder 61 is connected and installed on the filter cylinder seat 62. The upper end face of the filter slide block 63 is connected and installed on the piston rod of the filter cylinder 61.

[0066] The filter press plate 64 includes an upper filter press plate 641, a middle filter press plate 642, and a lower filter press plate 643. The upper filter press plate 641 is connected and installed on the lower end face of the filter press slide 63, and the lower filter press plate 643 is connected and installed above the filter press worktable 67. There are two middle filter press plates 642, which are respectively connected and installed on the filter press guide column 66 between the upper filter press plate 641 and the lower filter press plate 643. The lifting linkage ring 65 is connected between the upper filter press plate 641 and the middle filter press plate 642.

[0067] The filter belt includes an upper filter belt 41 and a lower filter belt 42, which are respectively wound on a belt traction machine; the upper filter belt 41 and the lower filter belt 42 pass through the upper pressure filter plate 641, the middle pressure filter plate 642 and the lower pressure filter plate 643.

[0068] The filter plate 64 has filter plate water guide grooves 644 on its upper and lower surfaces; a filter plate porous panel 645 is installed on top of the filter plate water guide grooves 644; and a filter plate water outlet pipe 647 is connected to the end face of the filter plate water guide grooves.

[0069] Example 2:

[0070] Please refer to Figures 4 and 5. The only difference between the spatial multilayer ultra-high pressure belt dehydration system of Embodiment 2 and Embodiment 1 is that:

[0071] The fabric feeding device 2 is a screw feeder 22; the fabric feeding device 3 is a screw fabric feeder 32.

[0072] To accommodate the different pressure requirements before and after material dewatering, two hydraulic filter presses 6 are installed in series. During material dewatering, the material is pre-pressed at a lower pressure when entering the first hydraulic filter press 6, and then further pressed at a higher pressure in the second hydraulic filter press 6 to achieve better dewatering results. To address the issue of residual water in the porous panel 645 of the filter plate falling back into the material and affecting dewatering when the filter plate 64 is lifted, a water-absorbing pad 646 is added to the filter plate 64. The water-absorbing pad 646 is connected and installed on the surface of the porous panel 645 of the filter plate.

[0073] To address the issue of high-moisture, high-flowability materials such as municipal sludge not being fully solidified during initial filtration and easily leaking out from both sides of the filter belt 4 in the direction of travel within the filtration space formed by the filter press plate 64, a material-blocking mechanism 9 is added. This mechanism includes a material-blocking bar 91 and a material-blocking cylinder 92. The material-blocking bar 91 is connected to the piston rod of the material-blocking cylinder 92 and is located on both sides of the filter press plate 64 in the direction of travel of the filter belt 4. The material-blocking cylinder 92 is connected to the hydraulic station 7 via an oil pipe. Before filtration begins, the material-blocking bar 91, under the pressure of the material-blocking cylinder 92, presses down on both sides of the filter press plate 64 in the direction of travel of the filter belt 4, thus preventing material leakage from these sides during filtration. Other structural features are the same as in Embodiment 1.

[0074] Example 3:

[0075] Please refer to Figures 6 and 7. The only difference between the spatial multilayer ultra-high pressure belt dehydration system of Embodiment 3 and Embodiment 1 is that:

[0076] To ensure faster and more thorough drainage of water entering the filter plate water guide groove 644 and the porous panel 645 of the filter plate 64 during the filter press operation, thereby improving the filter press dewatering effect, a vacuum negative pressure device 10 is connected and installed on the filter plate outlet pipe 647. To better prevent the filter belt 4 from deviating and to ensure that the upper filter belt 41 and lower filter belt 42 automatically fold inwards to enclose the filter material when entering the filter press space of the filter plate 64, preventing leakage and escape of the material during filter press dewatering, a filter belt guide mechanism 11 is added; the filter belt guide mechanism 11 is connected and installed on the main frame 1 on both sides of the filter belt 4. Other structures are the same as in Embodiment 1.

[0077] Example 4:

[0078] Please refer to Figure 8. The only difference between the spatial multilayer ultra-high pressure belt dehydration system of Embodiment 4 and Embodiment 3 is that:

[0079] The fabric feeding device 2 is a screw pump feeder 23.

[0080] To better connect with the downstream material handling equipment and improve the conveying stability of the dewatered material, preventing material bridging and falling, a material crushing device 12 is added and installed. The material crushing device 12 is connected and installed at the discharge end of the filter belt traction machine 5. The material crushing device 12 is a hammer / blade crusher. Other structures are the same as in Embodiment 3.

[0081] Example 5:

[0082] Please refer to Figure 9. The only difference between the spatial multilayer ultra-high pressure belt dehydration system of Embodiment 5 and Embodiment 4 is that:

[0083] In order to meet the needs of conveying filter press materials with higher moisture and viscosity, such as municipal sludge, from low to high position, the material feeding device 2 is a plunger pump feeder 24.

[0084] To increase the filtration time of the material without increasing the number of filter plates 64 in a single hydraulic filter press 6, thereby controlling the overall height of the equipment and ensuring its processing efficiency, three hydraulic filter presses 6 are installed in series. When the material is being dewatered by filtration, it is pre-pressed at a relatively low pressure when it enters the first hydraulic filter press 6, and then subjected to more frequent and longer filtrations at a higher pressure when it enters the second and third hydraulic filter presses 6 to achieve a better dewatering effect.

[0085] The material crushing device 12 is a screw conveyor, which is connected and installed below the discharge end of the filter belt traction machine. The material crushing device can be one of a screw conveyor, a twin-shaft shredder, a chain crusher, or a hammer / blade crusher. To further improve the dewatering effect and efficiency of high-viscosity materials such as municipal sludge that require chemical conditioning, a material dosing and stirring device 13 is added; the material dosing and stirring device 13 is connected and installed at the front end of the feeding device 2. Other structures are the same as in Embodiment 3.

[0086] The dehydration method of the space multilayer ultra-high pressure belt dehydration system of the present invention includes the following steps:

[0087] S1 Start-up Equipment: The controller 8 starts the multi-layer ultra-high pressure belt dewatering system, putting the feeding device 2, the feeding device 3, the filter belt traction machine 5, and the hydraulic station 7 into the start-up standby state.

[0088] S2 Fabric: Controller 8 controls the fabric feeding device 2 to feed the fabric to the fabric device 3. This is similar to Embodiment 3, except that:

[0089] The fabric feeding device 2 is a screw pump feeder 23.

[0090] To better connect with the downstream material handling equipment and improve the conveying stability of the dewatered material, preventing material bridging and falling, a material crushing device 12 is added and installed. The material crushing device 12 is connected and installed at the discharge end of the filter belt traction machine 5. The material crushing device 12 is a hammer / blade crusher.

[0091] Example 6:

[0092] Please refer to Figure 9. The only difference between the spatial multilayer ultra-high pressure belt dehydration system of Embodiment 5 and Embodiment 4 is that:

[0093] In order to meet the needs of conveying filter press materials with higher moisture and viscosity, such as municipal sludge, from low to high position, the material feeding device 2 is a plunger pump feeder 24.

[0094] To increase the filtration time of the material without increasing the number of filter plates 64 in a single hydraulic filter press 6, thereby controlling the overall height of the equipment and ensuring its processing efficiency, three hydraulic filter presses 6 are installed in series. During material filtration and dewatering, the material is pre-compressed at a relatively low pressure when entering the first hydraulic filter press 6, and then subjected to greater pressure and more frequent, longer filtration cycles in the second and third hydraulic filter presses 6 to achieve better dewatering results. Other structural details are the same as in Example 4.

[0095] The material crushing device 12 is a screw conveyor.

[0096] In order to further improve the filter press dewatering effect and efficiency of high-viscosity materials such as municipal sludge that require the addition of chemicals for conditioning, a material dosing and stirring device 13 is added; the material dosing and stirring device 13 is connected and installed at the front end of the material feeding device 2.

[0097] The dehydration method of the space multilayer ultra-high pressure belt dehydration system of the present invention includes the following steps:

[0098] S1 Start-up Equipment: The controller 8 starts the multi-layer ultra-high pressure belt dewatering system, so that the feeding device 2, the feeding device 3, the filter belt traction machine 5, and the hydraulic station 7 are in the start-up standby state.

[0099] S2 Fabrication: Controller 8 controls the fabric feeding device 2 to interact with the fabric feeding device 3642 and the lower filter plate 643 to perform filter dewatering on the first and second filter material layers as described above until the set time. The hydraulic station 7, the filter press 6, the belt fabric feeder 31, and the filter belt traction machine 5 repeat the aforementioned actions to complete the fabrication of the third filter material layer and transport the third filter material layer to the first filter station. Simultaneously, the second filter material layer is transported to the second filter station, and the first filter material layer is transported to the third filter station. Alternatively, once the set number of filter cycles and total filter time have been reached, the filter material layer is transported by the filter belt traction machine 5 and the filter belt 4 to the unloading station.

[0100] S4 Unloading: When the first material layer completes the set number of filter presses, it is conveyed upward or downward by the filter belt traction machine 5 and the filter belt 4 and leaves the filter press station between the upper filter plate 641 and the middle filter plate 642 or the middle filter plate 642 and the lower filter plate 643. The upper filter belt 41 and the lower filter belt 42 separate, and the first material layer is filtered into material sheets. During the operation of the filter belt 4, the material is unloaded from between the upper filter belt 41 and the lower filter belt 42 respectively to complete the unloading. This cycle is repeated, and the system completes the filter press and dewatering of one material layer after another, realizing the filter press and dewatering function.

[0101] Example 7: In a specific embodiment of the dewatering method of the spatial multi-layer ultra-high pressure belt dewatering system of the present invention, a spatial multi-layer ultra-high pressure belt dewatering system equipped with a filter press 6, two filter plates 64 and a cloth feeding device 3 located at the low position of the filter belt traction machine 5, and the filter belt 4 running from the low position to the high position, is used to dewater papermaking sludge with an initial moisture content of 70%. The filtration time of each filtration station of the filter press 6 is set to 40 seconds, and the total filtration time of the three filtration stations for the papermaking sludge is 120 seconds. The target moisture content of the papermaking sludge after dewatering is 45%. The specific steps of the dewatering method are as follows:

[0102] S1 Start-up Equipment: The controller 8 starts the multi-layer ultra-high pressure belt dewatering system, putting the belt feeder 21, belt cloth distributor 31, filter belt traction machine 5, and hydraulic station 7 into start-up standby state.

[0103] S2 Fabrication: Controller 8 controls belt feeder 21 to convey papermaking sludge with 70% moisture content to belt fabricator 31. Belt fabricator 31 and filter belt traction machine 5 simultaneously move towards filter press 6. Belt fabricator 31 evenly distributes the papermaking sludge with 70% moisture content onto the lower filter belt 42 running on the filter belt traction machine 5 below it. When the filter belt traction machine 5 pulls the lower filter belt 42 towards the filter press 6 for the length of one filter press plate 64, belt fabricator 31 stops running. At the same time, upper filter belt traction machine 51 pulls the upper filter belt 41 and lower filter belt 42 to continue moving synchronously upwards towards the filter press 6, sandwiching the papermaking sludge with 70% moisture content in the middle and conveying it to the filter press plates 643 and 642.

[0104] S3 Filter Press Dewatering: When the filter belt traction machine 5 pulls the upper filter belt 41 and lower filter belt 42, carrying a papermaking sludge material layer with 70% moisture content, to the center position of the filter press station between the lower filter plate 643 and the middle filter plate 642, the controller 8 controls the filter press hydraulic press 6 to perform a downward pressing action. The filter press slide 63 drives the upper filter plates 641 and 642 to move vertically downward synchronously until the pressure of the filter press cylinder 61 acts on the papermaking sludge material layer with 70% moisture content sandwiched by the upper filter belt 41 and lower filter belt 42 and the lower filter plate 643. Under the pressure of the filter press cylinder 61, the water in the papermaking sludge with 70% moisture content flows out to the surface and is separated into water and water. After passing through the upper filter belt 41 and lower filter belt 42, as well as the porous panel 645 of the filter plate, the water guide trough 644, and the filter plate outlet pipe 647, the first papermaking sludge material layer is discharged. When the first papermaking sludge material layer is filtered at the first filter press station for the set 40 seconds, the hydraulic station 7 depressurizes the filter press hydraulic press 6 to stop the filtration and causes the filter press hydraulic press 6 to move upward. The filter press slide 63 drives the upper filter plate 641 and the middle filter plate 642 to move upward, releasing the upper filter belt 41 and lower filter belt 42 and the papermaking sludge material layer therein. The belt feeder 31 and the filter belt traction machine 5 restart and continue to move towards the filter press hydraulic press 6, repeating the feeding step of S2 to complete the first step. The first papermaking sludge layer is pulled upwards by the filter belt traction machine 5 and the filter belt 4 to the center position of the second filter press station of the two intermediate pressure filter plates 642. The second papermaking sludge layer with 70% moisture content is simultaneously pulled and transported to the center position of the filter press station of the lower filter plate 643 and the intermediate pressure filter plate 642. The filter press hydraulic press 6 performs a second downward pressing action. The filter press slide 63 drives the upper filter plate 641, the intermediate pressure filter plate 642 and the lower filter plate 643 to interact and perform filter press dewatering on the first and second papermaking sludge layers as described above for a set time of 40 seconds. The filter press hydraulic press 6 and the belt feeder 31 The filter belt traction machine 5 repeats the aforementioned actions to complete the distribution of the third papermaking sludge material layer and transports the third papermaking sludge material layer to the first filter press station. Simultaneously, the second papermaking sludge material layer is transported to the second filter press station, and the first papermaking sludge material layer is transported to the third filter press station. The filter press hydraulic press 6 performs the downward pressing action for the third time. The filter press slide 63 drives the upper filter press plate 641, the middle filter press plate 642, and the lower filter press plate 643 to interact and perform filter press dewatering on the first, second, and third papermaking sludge material layers as described above until the set 40 seconds. At this point, the first papermaking sludge material layer has completed the set total filter press time of 120 seconds.

[0105] S4 Unloading: When the first papermaking sludge layer completes the set three filtration cycles totaling 120 seconds and the moisture content is reduced to the target value of 45%, it is conveyed upward by the filter belt traction machine 5 and the filter belt 4 away from the filtration station of the upper filter plate 641 and the middle filter plate 642. The upper filter belt 41 and the lower filter belt 42 separate. The first papermaking sludge layer is filtered into a material sheet with a moisture content of 45%. When the filter belt 4 runs to the unloading position, it is unloaded from the upper filter belt 41 and the lower filter belt 42 respectively to complete the unloading. This cycle is repeated, and the system completes the filtration and dewatering of one papermaking sludge layer after another, realizing the function of filtration and dewatering of papermaking sludge.

[0106] Another method of the dewatering system of the spatial multilayer ultra-high pressure belt dewatering system of the present invention is to dewater sugar filter mud with a moisture content of 65% by pressure filtration. The target moisture content of the sugar filter mud after dewatering is 50%. The specific embodiment differs from the previous embodiment only in that:

[0107] In response to the characteristics of sugar filter mud being highly viscous and requiring a longer dewatering time, S3 contains two hydraulic filter presses 6. The sugar filter mud is first subjected to three pre-filtering processes on the first hydraulic filter press 6 after the belt feeder 31, each lasting 40 seconds and at a pressure of 1 MPa. When the moisture content of the sugar filter mud has been reduced to a certain extent and its fluidity has decreased to the point of solidification, it then enters the second hydraulic filter press 6 for three ultra-high pressure filters, each lasting 40 seconds and at a pressure of 4 MPa, to achieve the target value of 50% moisture content in the dewatered sugar filter mud.

[0108] To address the issue of leakage and escape of the filter belt 4 from both sides of the filter plate 64 in the direction of movement at the start of the sugar filter mud filtration, in step S3, the baffle mechanism 9 located on both sides of the filter plate 64 of the first hydraulic press 6 performs a downward movement to press the filter belt 4 downward, and then the hydraulic press 6 further squeezes the sugar filter mud layer downward.

[0109] To address the issue of slow flow of sugar-containing filtrate during the pressure filtration of sugar filter mud, and to ensure faster and more thorough discharge of the filtrate, thereby further improving the dewatering effect, the water in the sugar filter mud in step S3 flows out of the surface under pressure and passes through the upper filter belt 41, the lower filter belt 42, the filter plate water absorption pad 646, the filter plate porous panel 645, and the water guide groove 644 before entering the filter plate water outlet pipe 647. The water is then drawn out by the vacuum negative pressure device 10 connected to the filter plate water outlet pipe 647.

[0110] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A spatial multi-layer ultra-high pressure belt dehydration system, characterized in that: It includes a main frame, a material feeding device, a material feeding device, a filter belt, a filter belt traction machine, a filter press hydraulic press, a hydraulic station, and a controller; the material feeding device, the material feeding device, the filter belt traction machine, and the filter press hydraulic press are connected and installed on the main frame; the output end of the material feeding device is connected and installed above the material feeding device; The filter belt includes an upper filter belt and a lower filter belt, which are respectively wound on the filter belt traction machine; the filter press hydraulic press is connected to the hydraulic station through hydraulic oil pipes; the material feeding device, the material feeding device, the filter belt traction machine, the filter press hydraulic press, the hydraulic station, and the controller are electrically connected; The filter press hydraulic press includes a filter cylinder, a filter cylinder base, a filter slide, a filter plate, a lifting linkage ring, filter guide columns, and a filter worktable; the filter worktable is connected and installed directly above the main frame; the filter guide columns are connected from top to bottom between the filter cylinder base, the filter slide, the filter plate, and the filter worktable; the filter cylinder is connected and installed on the filter cylinder base; the upper end face of the filter slide is connected and installed on the piston rod of the filter cylinder; The filter press includes an upper filter press, a middle filter press, and a lower filter press. The upper filter press is connected and installed on the lower end face of the filter press slide, the lower filter press is connected and installed on the upper part of the filter press worktable, and the middle filter press is connected and installed on the filter press guide column between the upper and lower filter presses. A lifting linkage ring is provided between the upper and middle filter presses, and the upper and lower filter belts pass through the upper, middle, and lower filter presses.

2. The spatial multi-layer ultra-high pressure belt dehydration system according to claim 1, characterized in that: The filter plate has water guide grooves on its upper and lower surfaces; a porous filter plate panel is installed above the water guide grooves; and a filter plate outlet pipe is connected to the end face of the water guide grooves.

3. The spatial multi-layer ultra-high pressure belt dehydration system according to any one of claims 1-2, characterized in that: It also includes a filter press water-absorbing pad; the filter press water-absorbing pad is connected and installed on the surface of the porous panel of the filter plate.

4. The spatial multi-layer ultra-high pressure belt dehydration system according to claim 1, characterized in that: The filter press is installed in series with one or more units.

5. The spatial multi-layer ultra-high pressure belt dehydration system according to claim 1, characterized in that: It also includes a material blocking mechanism; the material blocking mechanism includes a material blocking bar and a material blocking cylinder; the material blocking bar is connected and installed on the piston rod of the material blocking cylinder, and the material blocking bar is located on both sides in the running direction of the filter plate and the filter belt; the material blocking cylinder is connected to the hydraulic station through an oil pipe.

6. The spatial multi-layer ultra-high pressure belt dehydration system according to any one of claims 1-2, characterized in that: A vacuum negative pressure device is connected and installed on the water outlet pipe of the filter plate.

7. The spatial multi-layer ultra-high pressure belt dehydration system according to claim 1, characterized in that: It also includes a filter belt guide mechanism, which is connected to the main frame on both sides of the filter belt.

8. The space multi-layer ultra-high pressure belt dehydration system according to claim 1, characterized in that: The material feeding device is a belt feeder, screw feeder, screw pump feeder, or plunger pump feeder; the material spreading device is a belt spreader or screw spreader, and the output end of the material spreading device is located on the lower filter belt of the filter belt traction machine.

9. The space multi-layer ultra-high pressure belt dehydration system according to claim 1, characterized in that: It also includes a material crushing device; the material crushing device is connected and installed below the discharge end of the filter belt traction machine; the material crushing device is a screw conveyor or a twin-shaft shredder, chain crusher, or hammer / blade crusher.

10. The spatial multi-layer ultra-high pressure belt dehydration system according to claim 1, characterized in that: It also includes a material dosing and mixing device; the material dosing and mixing device is connected and installed at the front end of the fabric feeding device.

11. A dehydration method using the spatial multi-layer ultra-high pressure belt dehydration system as described in claims 1-10, characterized in that: It includes the following steps: S1: Start the equipment. Start the multi-layer ultra-high pressure belt dewatering system through the controller, so that the feeding device, feeding device, filter belt traction machine and hydraulic station are in the start-up standby state. S2: Material feeding. The controller controls the material feeding device to feed material to the material feeding device. The material feeding device and the filter belt traction machine operate simultaneously. The material feeding device lays the filter press material onto the lower filter belt running on the filter belt traction machine. When the filter belt traction machine pulls the lower filter belt to move one filter press station length in the direction of the filter press hydraulic press, the material feeding device stops running. At the same time, the filter belt traction machine pulls the upper filter belt and the lower filter belt to move synchronously in the direction of the filter press hydraulic press or downward, and clamps the filter press material in the middle to convey it to the filter press station of the lower filter plate and the middle filter plate or the upper filter plate and the middle filter plate. S3: Filtration and Dewatering. When the filter belt traction machine pulls the upper and lower filter belts, carrying the filter material layer, to the center position of the filter pressing station of the lower and middle filter plates, the controller controls the filter press hydraulic press to perform a downward pressing action. The filter press slide moves the upper and middle filter plates to simultaneously and vertically press downwards until the pressure of the filter press cylinder acts on the filter material layer sandwiched by the upper and lower filter belts and the lower filter plate. Under the pressure of the filter press cylinder, the water in the filter material flows out of the surface and passes through the upper and lower filter belts, the porous panel of the filter plate, and the water guide groove, respectively and successively. The filter material is discharged through the filter plate outlet pipe. When the first filter press material layer has been pressed for the set time at the first filter press station, the hydraulic station depressurizes the filter press hydraulic press to stop the pressing and causes the filter press hydraulic press to move upward. The filter press slide moves the upper and middle filter plates upward to release the upper and lower filter belts and the filter material layer therein. The belt feeder and filter belt traction machine restart and continue to move towards the filter press hydraulic press. The above steps are repeated to complete the feeding of the second filter press material layer. The first filter press material layer is pulled upward by the belt traction machine and filter belt. The material is conveyed to the center position of the second filter press station formed by the filter plates. The second filter material layer is synchronously pulled and conveyed to the center position of the filter press station of the lower and middle filter plates. The filter press hydraulic press performs a second pressing action. The filter press slide drives the upper, middle and lower filter plates to interact and filter and dewater the first and second filter material layers as described above until the set time. The hydraulic station, the filter press hydraulic press, the belt feeder and the filter belt traction machine repeat the above actions to complete the feeding of the third filter material layer and convey the third filter material layer to the first filter press station. At the same time, the second filter material layer is conveyed to the second filter press station and the first filter material layer is conveyed to the third filter press station. Or, when the set number of filter presses and the total filter press time have been reached, the filter material layer is conveyed by the filter belt traction machine and the filter belt to be unloaded. S4: Unloading. When the first material layer completes the set number of filter presses, it is conveyed upward or downward by the filter belt traction machine and the filter belt away from the filter press station between the upper filter plate and the middle filter plate or between the middle filter plate and the lower filter plate. The upper filter belt and the lower filter belt separate, and the first material layer is pressed into material sheets. During the operation of the filter belt, the material is unloaded from between the upper filter belt and the lower filter belt respectively, thus completing the unloading. This cycle is repeated, and the system completes the filter press and dewatering of one material layer after another, realizing the filter press and dewatering function.

12. The dehydration method of the space multi-layer ultra-high pressure belt dehydration system according to claim 11, characterized in that: in, When there are two or more filter presses in S3, the pressure applied to the filter material by the filter presses from the material feeding device onwards gradually increases. That is, when the material is dewatered by filter press, when the filter material enters the first filter press, it is pre-pressed with a low pressure. Then, the pressure is gradually increased by each filter press to achieve a better dewatering effect. In S3, the baffle mechanisms located on both sides of the filter press move downward to press the filter belt downward, and then the filter press squeezes the filter material downward. In S3, the moisture in the filter material flows out of the surface under pressure and passes through the upper and lower filter belts, filter plate water absorption pad, filter plate porous panel, water guide groove and filter plate water outlet pipe respectively and sequentially to be discharged. When a vacuum negative pressure device is connected to the water outlet pipe of the filter plate in S3, the water in the water guide groove of the filter plate is sucked out through the vacuum negative pressure device when the hydraulic press of the filter press squeezes the filter material.

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