Filter belt type filter pressing mechanism and belt type filter pressing equipment

Abstract

The invention relates to the technical field of sludge dewatering, and discloses a filter belt type filter pressing mechanism and belt type filter pressing equipment. The filter belt type filter-pressing mechanism comprises a filter-pressing filter belt, and one end of the filter-pressing filter belt is partially wound on a plurality of press rollers in sequence; the filter pressing filter belt is provided with a squeezing space, and sludge can enter the squeezing space; the plurality of press rolls are alternately arranged in two rows; wherein the plurality of press rollers are configured as follows: the roller diameters of the plurality of press rollers are gradually reduced along the advancing direction of the filter pressing filter belt, and the horizontal distance difference between the circle centers of any two adjacent press rollers is gradually reduced. The belt type filter pressing equipment comprises the filter belt type filter pressing mechanism and a driving mechanism, wherein the driving mechanism is used for driving the first filter belt and the second filter belt to rotate. According to the scheme, the technical problems of non-ideal dehydration effect and high energy consumption of belt type filter pressing equipment in the prior art are solved.

Description

Technical Field

[0001] The invention relates to the technical field of sludge dehydration, and in particular to a belt filter press mechanism and a belt filter press device. Background Art

[0002] At present, some existing belt filter presses have limited dehydration capacity, and the stroke between the pressing rollers is long. When the filter belt switches between the two rollers, the pressure from the pressing rollers will be lost, causing part of the squeezed water to flow back into the gaps in the sludge, making the dehydration effect worse. Based on this, some belt filter presses have reduced the stroke between the pressing rollers to reduce the time the pressing rollers cut off the pressure on the filter belt. However, due to the reduction in the roller spacing, the filter belt will fit more closely on the pressing roller, resulting in greater friction between the filter belt and the pressing roller, which increases energy consumption.

[0003] Therefore, providing a belt filter press mechanism and a belt filter press equipment with good dehydration capacity and low energy consumption is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0004] The invention discloses a belt filter press mechanism and a belt filter press device, so as to solve the technical problems of unsatisfactory dehydration effect and high energy consumption in the belt filter press device in the related art.

[0005] In order to solve the above problems, the present invention adopts the following technical solutions: In a first aspect, the present invention discloses a filter belt type filter press mechanism, comprising: The filter press belt has one end portion wound around a plurality of pressing rollers in sequence; the filter press belt has a pressing space into which the sludge can enter; A number of press rolls are arranged alternately in two rows; Among them, the plurality of pressing rollers are configured such that: along the moving direction of the filter press belt, the roller diameters of the plurality of pressing rollers gradually decrease, and the horizontal distance difference between the centers of any two adjacent pressing rollers gradually decreases.

[0006] In some solutions, the orthographic projections of any two adjacent press rolls along the direction perpendicular to the axial direction of the press rolls partially overlap.

[0007] In some schemes, along the traveling direction of the filter press belt, the height difference between the centers of any two adjacent press rollers gradually decreases.

[0008] In some embodiments, along the travel direction of the filter press belt, any two adjacent press rollers satisfy the relationship: 1.1≤k≤1.7, Wherein, k is the ratio of the roll diameter of a press roll with a larger roll diameter to the roll diameter of a press roll with a smaller roll diameter.

[0009] In some embodiments, along the travel direction of the filter press belt, any two adjacent press rollers satisfy the relationship: R1 <H<(R1+R2) / 2, R1 <L<(R1+R2) / 2, Wherein, R1 is the radius of the larger press roll, R2 is the radius of the smaller press roll, H is the height difference between the centers of the two press rolls, and L is the horizontal distance difference between the centers of the two press rolls.

[0010] In some schemes, the gap of the pressing space gradually decreases before the filter press belt passes through the pressing roller with the largest roller diameter.

[0011] In some solutions, a water receiving tray is provided under each pressing roller, and the water receiving tray is connected to a drainage pipe.

[0012] In some embodiments, a plurality of press rolls are divided into two rows and arranged alternately in sequence along the height direction of the belt filter press; The roller diameters of the plurality of press rollers gradually decrease from bottom to top.

[0013] In a second aspect, the present invention further discloses a belt filter press device, comprising the belt filter press mechanism and a driving mechanism in the first aspect; The driving mechanism is used to drive the filter press belt to rotate.

[0014] In some embodiments, a tensioning mechanism is further included to adjust the tightness of the filter press belt.

[0015] The technical solution adopted by the present invention can achieve the following beneficial effects: In the filter belt type filter press mechanism of the present application, during the process of dehydrating sludge, the sludge enters the pressing space of the filter press belt, and as the filter press belt moves, a number of pressing rollers squeeze and dehydrate the sludge in the pressing space. Along the moving direction of the filter press belt, the roller diameters of the number of pressing rollers gradually decrease, and the height difference between the centers of any two adjacent pressing rollers gradually decreases. During the process of switching the filter press belt between rollers, the corresponding pressure disconnection time of the pressing roller on the filter press belt is as short as possible, ensuring that the sludge is stably coated in the filter press belt, and as the filter press belt rotates, the sludge switches between two adjacent pressing rollers to further improve the dehydration effect. At the same time, by gradually reducing the diameter of several pressing rollers, a looser pressing environment is provided for the sludge in the initial stage of pressing. As the sludge continues to move, the diameter of the pressing rollers gradually decreases, the pressing force gradually increases, and the sludge is squeezed and dehydrated step by step, making the sludge flow smoother during the pressing process, thereby reducing the energy consumption of equipment operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is an axial view of the belt filter press device of the present invention; Figure 2 yes Figure 1 The enlarged view of point A in the middle; Figure 3 yes Figure 2 The enlarged view of point B in the middle; Figure 4 yes Figure 1 Enlarged view of point C in the middle; Figure 5 It is a schematic diagram of the installation relationship of several pressing rollers of the present invention; Figure 6 The working state of the filter belt type filter press mechanism of the present invention is shown in FIG. Figure 1 ; Figure 7 The working state of the filter belt type filter press mechanism of the present invention is shown in FIG. Figure 2 .

[0018] In the figure: 100-belt filter press equipment, 110-driving mechanism, 120-tensioning mechanism; 200 - filter belt type filter press mechanism, 210 - pressing roller, 220 - filter press belt, 221 - first filter belt, 222 - second filter belt, 230 - pressing space, 240 - water receiving tray, 241 - drainage pipe. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0020] The terms "first", "second", etc. in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same type, and the number of objects is not limited. For example, the first object can be one or more.

[0021] The applicant has found in use that the dehydration capacity of some existing belt filter presses 100 is limited, and the stroke between the pressing rollers 210 is long. When the filter belt switches between the two rollers, the pressure from the pressing roller 210 is lost, causing part of the squeezed water to flow back into the gaps in the sludge, making the dehydration effect worse. Based on this, some belt filter presses 100 also reduce the stroke between the pressing rollers 210 to reduce the time that the pressing rollers 210 disconnect the pressure on the filter belt. However, due to the reduction in the roller spacing, the filter belt will fit more closely on the pressing roller 210, resulting in greater friction between the filter belt and the pressing roller 210, which increases energy consumption.

[0022] The following is combined with Figures 1 to 7 , a belt filter press mechanism 200 and a belt filter press device 100 provided in the present application are described in detail through specific embodiments and their application scenarios.

[0023] Please refer to Figure 1-Figure 3 , a filter belt press mechanism 200 provided in some embodiments of the present application includes a filter belt 220 and a plurality of pressing rollers 210 .

[0024] like Figure 2 and Figure 5 As shown, a plurality of press rollers 210 are arranged alternately in two rows, and one end portion of the filter belt 220 is wound around the plurality of press rollers 210 in sequence. The press rollers 210 arranged alternately in two rows can more effectively distribute the pressure evenly on the sludge, exert a continuous pressing force on the sludge, and improve the dehydration effect. At the same time, since the pressure is more uniform, the wear between the press rollers 210 and the filter belt 220 will also be reduced accordingly, extending the service life of the equipment. The press rollers 210 arranged alternately in two rows also provide a longer pressing path for the sludge, thereby improving the pressing efficiency.

[0025] In this embodiment, the number of the pressing rollers 210 can be 3, 4, 5, 6, 7, 8, 9 or more, and can be flexibly set according to usage requirements, which is not limited in this embodiment.

[0026] like Figure 3As shown, the filter press belt 220 has a pressing space 230, so that the sludge can enter the pressing space 230. As the filter press belt 220 moves, the sludge in the pressing space 230 moves with the filter press belt 220, and a plurality of pressing rollers 210 squeeze and dehydrate the sludge in the pressing space 230.

[0027] In this embodiment, the filter press belt 220 includes a first filter belt 221 and a second filter belt 222. The first filter belt 221 and the second filter belt 222 are alternately located inside and outside along the traveling direction of the filter press belt 220. For example, when the last pressing roller 210 is pressed, the first filter belt 221 is located inside and the second filter belt 222 is located outside. When the next pressing roller 210 is pressed, the first filter belt 221 is located outside and the second filter belt 222 is located inside.

[0028] By alternating the first filter belt 221 and the second filter belt 222 inside and outside, the sludge can be switched to the filter pressing focus in the pressing space 230 during the process of squeezing and dehydrating the sludge by the squeezing roller 210 .

[0029] It should be noted that the filter press focus switching refers to: Figure 6 As shown, in this state, the first extrusion surface P of the sludge is located on the inner side, and the second extrusion surface L is located on the outer side. The pressing roller 210 directly acts on the first extrusion surface P of the sludge, so that the extrusion water effect at the first extrusion surface P is significantly better than the extrusion water effect at the second extrusion surface L. Figure 7 As shown, as the filter belt 220 moves, the sludge is driven to move to the next pressing roller 210. In this state, the first pressing surface P of the sludge is located on the outside, and the second pressing surface L is located on the inside. The pressing roller 210 directly acts on the second pressing surface L of the sludge, so that the squeezing water effect of the second squeezing surface L is significantly better than that of the first squeezing surface P. Through reciprocating alternation, the two surfaces of the sludge are squeezed and dehydrated to ensure the dehydration effect of the sludge.

[0030] It should also be noted that, during the process of the first filter belt 221 and the second filter belt 222 alternating inside and outside, the angular velocity of the first filter belt 221 and the angular velocity of the second filter belt 222 are different, so that the first filter belt 221 and the second filter belt 222 also cause shear force on the sludge, further increasing the dehydration effect of the sludge.

[0031] like Figure 2 and Figure 5 As shown, the roller diameters of the plurality of press rollers 210 gradually decrease along the traveling direction of the filter press belt 220 .

[0032] When the roller diameter of the pressing roller 210 is fixed, in order to satisfy the squeezing force of the pressing roller 210 on the sludge, the roller diameter of the pressing roller 210 cannot be made too large. When several pressing rollers 210 with fixed roller diameters squeeze and dehydrate the sludge, excessive pressure is generated at the beginning of squeezing, and the squeezed sewage is easy to return to the gaps in the sludge, increasing useless work and thus increasing the energy consumption of the equipment. In this embodiment, by gradually reducing the roller diameters of several pressing rollers 210, a loose squeezing environment is provided for the sludge in the initial stage of squeezing, and as the sludge continues to move, the roller diameter of the pressing roller 210 gradually decreases, the squeezing force gradually increases, and the sludge is squeezed and dehydrated step by step, thereby reducing the energy consumption of the equipment operation.

[0033] like Figure 5 As shown, along the traveling direction of the filter press belt 220, the horizontal distance difference between the centers of any two adjacent pressing rollers 210 gradually decreases.

[0034] By gradually reducing the horizontal distance difference between the centers of any two adjacent pressing rollers 210, the time for the pressing roller 210 to disconnect the filter belt 220 can be effectively reduced, ensuring that the sludge is stably enclosed in the pressing space 230 for switching the filter pressure focus, thereby improving the dehydration effect.

[0035] like Figure 5 As shown, along the traveling direction of the filter press belt 220, the height difference between the centers of any two adjacent pressing rollers 210 gradually decreases.

[0036] By gradually reducing the height difference between the centers of any two adjacent pressing rollers 210, the pressing force on the sludge gradually increases during the movement of the sludge along the travel direction of the filter press belt 220, so as to better squeeze and dehydrate the sludge. At the same time, the time when the filter press belt 220 is disconnected from the filter press belt 220 by the pressing roller 210 is as short as possible during the switching between rollers, so as to ensure that the sludge is stably covered in the pressing space 230 for switching the filter press focus, and further improve the dehydration effect.

[0037] like Figure 5 As shown, the orthographic projections of any two adjacent press rolls 210 along the direction perpendicular to the axial direction of the press rolls 210 partially overlap.

[0038] By making any two adjacent press rollers 210 partially overlap along the orthographic projection perpendicular to the axial direction of the press roller 210, the portion of the filter press belt 220 that switches between rollers is always tilted downward along the traveling direction of the filter press belt 220. This also makes the covering angle of the filter press belt 220 to the press roller 210 greater than 180°, thereby increasing the area of ​​the press roller 210 acting on the press space 230 and further reducing the time for the press roller 210 to cut off the pressure on the press space 230. At the same time, the covering angle of the filter press belt 220 to the press roller 210 greater than 180° also makes the filter press belt 220 exert centripetal pressure on the sludge, ensuring the pressing effect.

[0039] like Figure 5 As shown, along the traveling direction of the filter press belt 220, any two adjacent press rollers 210 satisfy the relationship: 1.1≤k≤1.7, In the formula, k is the ratio of the roll diameter of a press roll 210 with a larger roll diameter to the roll diameter of a press roll 210 with a smaller roll diameter.

[0040] The roller diameter ratio of any two adjacent pressing rollers 210 satisfies 1.1≤k≤1.7. By controlling the reduction value of the roller diameter of the pressing roller 210 within a certain range, the excessive increase of the pressing force can be limited, thereby ensuring the stability of the equipment. Therefore, the roller diameter ratio of any two adjacent pressing rollers 210 is maintained within the range of 1.1≤k≤1.7, which is the balance point between the equipment operation stability and the pressing efficiency. Within this range, the equipment can operate stably and ensure that sufficient pressing force is applied to the sludge to meet the dehydration requirements of the sludge.

[0041] In some embodiments, the roller diameters of the plurality of press rollers 210 are 470 cm, 320 cm, 270 cm, 217 cm, 150 cm, 120 cm, etc., from large to small. In some embodiments, the roller diameters of the plurality of press rollers 210 are 800 cm, 471 cm, 320 cm, 270 cm, 200 cm, 145 cm, etc., from large to small. It is reasonable that the roller diameters of the plurality of pressing rollers 210 in this embodiment are not limited to the values ​​in the above-mentioned embodiment, but may also be other values, and may be flexibly set according to usage requirements.

[0042] like Figure 5 As shown, along the traveling direction of the filter press belt 220, any two adjacent press rollers 210 satisfy the relationship: R1 <H<(R1+R2) / 2, R1 <L<(R1+R2) / 2, In the formula, R1 is the radius of the press roll 210 with a larger roll diameter, R2 is the radius of the press roll 210 with a smaller roll diameter, H is the height difference between the centers of the two press rolls 210, and L is the horizontal distance difference between the centers of the two press rolls 210.

[0043] Firstly, the roller diameters of two adjacent pressing rollers 210 are reasonably designed. When the filter press belt 220 is switched between rollers, the corresponding pressure disconnection time of the pressing roller 210 on the filter press belt 220 is as short as possible, so as to ensure that the sludge is stably coated between the first filter belt 221 and the second filter belt 222 for switching between the filter press and improve the dehydration effect.

[0044] Secondly, the height difference between any two adjacent press rollers 210 is reasonably designed, and while ensuring that the angle and area of ​​the filter belt 220 covering the press roller 210 are as large as possible, it also avoids the situation where the first filter belt 221 and the second filter belt 222 cover the press roller 210 too large. This can not only increase the area of ​​the press roller 210 acting on the press space 230, but also solve the problem that the filter belt 220 covers the press roller 210 too large, resulting in increased power consumption of the equipment.

[0045] Thirdly, the horizontal distance difference between any two adjacent press rolls 210 is reasonably designed, which can reduce the stroke between the press rolls 210 as much as possible and avoid the situation where the stroke is too small. This can not only reduce the time for the filter press belt 220 to switch between the rolls, but also solve the problem that the stroke of two adjacent press rolls 210 is too small, resulting in insufficient coverage angle and area between the filter press belt 220 and the press roll 210.

[0046] like Figure 5 As shown, before the filter press belt 220 passes through the pressing roller 210 with the largest roller diameter, the gap in the filter press space gradually decreases.

[0047] After the sludge is processed by the above process, it falls on the inner bottom of the filter press space (the top of the second filter belt 222), and moves with the filter press belt 220. The gap between the first filter belt 221 and the second filter belt 222 gradually decreases, so that before squeezing, the squeezing space 230 forms a structure with a narrow end close to the squeezing roller 210 and a wide end away from the squeezing roller 210, similar to a funnel shape, which ensures the stability and continuity of the sludge when feeding, thereby avoiding the accumulation of sludge at the entrance.

[0048] As a preferred embodiment of the present invention, before passing through the press roller 210 with the largest roller diameter, the second filter belt 222 is horizontal, and the first filter belt 221 is tilted downward from the press roller 210 to the press roller 210, forming a funnel-like structure. The horizontal second filter belt 222 can stably drive the sludge to move, so that the sludge will not move relative to the second filter belt 222, further ensuring the stability of the sludge during feeding.

[0049] like Figure 1 and Figure 4 As shown, a water receiving tray 240 is provided below each pressing roller 210 , and the water receiving tray 240 is connected to a drainage pipe 241 .

[0050] As the first filter belt 221 and the second filter belt 222 move, a plurality of press rollers 210 squeeze and dehydrate the sludge in the first filter belt 221 and the second filter belt 222. During the squeezing and dehydrating process, the water in the sludge will be squeezed out and flow downward under the action of gravity. Therefore, a water receiving tray 240 is provided under each press roller 210 to receive the sewage squeezed out by the press roller 210, thereby avoiding the corrosion and damage of the equipment by the sewage and extending the service life of the equipment. At the same time, by collecting the sewage, the harmful substances therein are removed through purification, filtration and other means to meet the discharge standards, thereby avoiding pollution to the environment.

[0051] In this embodiment, the top of the water receiving tray 240 has a plurality of inclined drainage surfaces, and the plurality of drainage surfaces are inclined from the top to the bottom toward the drainage pipe 241 , so that the sewage falling into the water receiving tray 240 can be smoothly discharged through the drainage pipe 241 .

[0052] In some embodiments, each water receiving tray 240 discharges the sewage out of the device through an independent drainage pipe 241 .

[0053] In some embodiments, the plurality of water receiving trays 240 are divided into two groups of water receiving trays 240 , and the plurality of water receiving trays 240 in the two rows of water receiving trays 240 are connected by a plurality of drainage pipes 241 , and the sewage is discharged out of the equipment through the bottommost water receiving tray 240 .

[0054] In some embodiments, a plurality of water receiving trays 240 are connected along the travel direction of the first filter belt 221 and the second filter belt 222 , and the sewage is discharged out of the equipment through the bottommost water receiving tray 240 .

[0055] like Figure 2 and Figure 5As shown, a plurality of pressing rollers 210 are divided into two rows and arranged alternately in sequence along the height direction of the belt filter press device 100. When the filter belt press mechanism 200 of this embodiment is used in the belt filter press device 100, a plurality of pressing rollers 210 are arranged vertically, so that the sewage of the sludge squeezed out by each pressing roller 210 is collected independently without interfering with each other, thereby effectively improving the dehydration efficiency.

[0056] like Figure 2 and Figure 5 As shown, the roller diameters of the plurality of pressing rollers 210 gradually decrease from bottom to top. When the filter belt press mechanism 200 of this embodiment is used in the belt filter press equipment 100, the roller diameters of the plurality of pressing rollers 210 gradually decrease from bottom to top, so that the feed port of the belt filter press equipment 100 is arranged near the bottom and the discharge port is arranged near the top, which is more convenient for connecting the front and rear equipment and occupies less space.

[0057] Some embodiments of the present application also provide a belt filter press device 100, such as Figure 1 As shown, it includes a filter belt type filter press mechanism 200 and a driving mechanism 110. For the layout of the filter belt 220 in the belt type filter press device 100, please refer to the utility model patent with publication number CN217230532U.

[0058] like Figure 1 As shown, the driving mechanism 110 is used to drive the filter press belt 220 to rotate, and one end of the filter press belt 220 is also wound on the driving roller. As a preferred embodiment of the present invention, the driving mechanism 110 includes a chain, a motor and two driving gears, the two driving gears are respectively connected to the output shaft of the motor and the driving roller, and the chain is wound on the two driving gears. One end of the filter press belt 220 is wound on the driving roller. The output shaft of the motor drives the driving roller to rotate, so that the filter press belt 220 rotates.

[0059] like Figure 1 As shown, it also includes a tensioning mechanism 120 for adjusting the tightness of the filter press belt 220. As preferred in this embodiment, the first filter belt 221 and the second filter belt 222 of the filter press belt 220 are respectively wound on two tensioning rollers, and the two tensioning rollers can move horizontally along the belt filter press equipment 100 to adjust the tightness of the filter press belt 220. The tensioning mechanism 120 includes a telescopic rod, a rotating gear and a rack, one end of the tensioning roller is connected to the rotating gear, the free end of the telescopic rod is movably connected to the rotating gear, and the rotating gear is meshed with the rack. The position of the tensioning roller changes by extending and shortening the free end of the telescopic rod, thereby adjusting the tightness of the first filter belt 221 and the second filter belt 222.

[0060] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0061] In addition, it should be noted that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in a reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

[0062] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A belt filter press mechanism (200), characterized in that: include: A filter press belt (220), one end of which is wound around a plurality of press rollers (210) in sequence; The filter press belt (220) has a pressing space (230), and sludge can enter the pressing space (230); A plurality of pressing rollers (210) are arranged alternately in two rows; The plurality of pressing rollers (210) are configured such that: along the moving direction of the filter press belt (220), the roller diameters of the plurality of pressing rollers (210) gradually decrease, and the horizontal distance difference between the centers of any two adjacent pressing rollers (210) gradually decreases.

2. The belt filter press mechanism (200) according to claim 1, characterized in that: The orthographic projections of any two adjacent pressing rollers (210) along a direction perpendicular to the axial direction of the pressing rollers (210) partially overlap.

3. The belt filter press mechanism (200) according to claim 1, characterized in that: Along the traveling direction of the filter press belt (220), the height difference between the centers of any two adjacent pressing rollers (210) gradually decreases.

4. The belt filter press mechanism (200) according to claim 1, characterized in that: Along the traveling direction of the filter press belt (220), any two adjacent pressing rollers (210) satisfy the relationship: 1.1≤k≤1.7， In the formula, k is the ratio of the roller diameter of the pressing roller (210) with a larger roller diameter to the roller diameter of the pressing roller (210) with a smaller roller diameter.

5. A belt filter press mechanism (200) according to any one of claims 1 to 4, characterized in that: Along the traveling direction of the filter press belt (220), any two adjacent pressing rollers (210) satisfy the relationship: R1 <H<(R1+R2) / 2, R1 <L<(R1+R2) / 2, In the formula, R1 is the radius of the pressing roller (210) with a larger roller diameter, R2 is the radius of the pressing roller (210) with a smaller roller diameter, H is the height difference between the centers of the two pressing rollers (210), and L is the horizontal distance difference between the centers of the two pressing rollers (210).

6. The belt filter press mechanism (200) according to claim 1, characterized in that: Before the filter press belt (220) passes through the pressing roller (210) having the largest roller diameter, the gap of the pressing space (230) gradually decreases.

7. The belt filter press mechanism (200) according to claim 1, characterized in that: A water receiving tray (240) is provided below each of the pressing rollers (210), and the water receiving tray (240) is connected to a drainage pipe (241).

8. The belt filter press mechanism (200) according to claim 1, characterized in that: The plurality of pressing rollers (210) are divided into two rows and arranged alternately in sequence along the height direction of the belt filter press equipment (100); The roller diameters of the plurality of pressing rollers (210) gradually decrease from bottom to top.

9. A belt filter press device (100), characterized in that: Comprising the belt filter press mechanism (200) and a driving mechanism (110) according to any one of claims 1 to 8; The driving mechanism (110) is used to drive the filter press belt (220) to rotate.

10. The belt filter press device (100) according to claim 9, characterized in that: It also includes a tensioning mechanism (120) for adjusting the tightness of the filter press belt (220).

Images