Top roll belt filter press

Abstract

The utility model discloses a top roller formula belt filter press, including frame, upper filter belt and lower filter belt, a plurality of guider, press roll, tensioning mechanism, this top roller formula belt filter press still includes top roller mechanism, and at least one press roll of inside pressurizing area is set up top roller mechanism in matched, and top roller mechanism and corresponding press roll are located in the both sides of upper filter belt and lower filter belt in the superposed state respectively, and matched setting press roll and top roller mechanism in at least one item are configured to can be close to the other party to superposed state's upper filter belt and lower filter belt to exert additional pressure of vertical direction or away from each other. The utility model discloses through the innovative increase top roller mechanism at press roll, and can change the whole net surface tension in the sludge pressurizing process, based on sludge moisture content state change situation, through the adjustment contact pressure between top roller and press roll and / or adjustment top roller quantity, additional pressure is exerted to superposed state's upper filter belt and lower filter belt, thereby realizes higher dewatering effect.

Description

Technical Field

[0001] This utility model relates to the field of environmental protection technology, and in particular to the field of sludge dewatering and volume reduction technology. Specifically, it is a top roller belt filter press for reducing the water content of sludge. Background Technology

[0002] Belt filter presses are highly efficient equipment widely used in solid-liquid separation, particularly for sludge dewatering in municipal wastewater treatment. In this technical field, the dewatering principle of a belt filter press involves passing flocculated sludge through a gravity dewatering zone, reducing its moisture content from 97% to approximately 93% through gravity seepage. The gravity-dewatered sludge is then fed into an intermediate area composed of upper and lower filter belts. The sludge is held between the upper and lower filter belts and fed into several sets of S-shaped rollers. Tensioning cylinders tighten the upper and lower filter belts, generating a squeezing force on the sludge within the S-shaped rollers, resulting in further deep dewatering.

[0003] However, within this technical field, various factors, such as stricter municipal sludge treatment regulations, cost reduction and efficiency improvement requirements for wastewater treatment plants, and higher moisture content standards for downstream sludge post-treatment, have placed higher demands on sludge reduction. In the traditional field of belt filter presses, to further reduce the moisture content of sludge, the conventional practice in wastewater treatment plants is to further increase the tension of the mesh belts to indirectly increase the compressive force of the upper and lower mesh belts on the sludge. However, this approach often brings the following new problems:

[0004] (1) When the cylinder increases the tension on the mesh belt, the mesh belt is often stretched under tension due to the high molecular weight polyester woven mesh belt. The pore structure designed during the weaving process is destroyed, which affects the sludge retention and water permeability, and has the opposite effect on sludge dewatering and filtration. However, in order to further increase the moisture content, the cylinder can only apply greater tension to the mesh surface to convert it into squeezing force on the sludge. These two contradictory points cause the traditional belt filter press to experience an increase in sludge moisture content or even sludge leakage after the cylinder increases a certain tension.

[0005] (2) As mentioned in the previous question, the squeezing pressure of the belt filter press on the sludge is transmitted to the pressing rollers through the mesh belt body after the tensioning cylinder applies tension to the mesh belt. The transverse force transmitted to the pressing rollers along the running direction of the mesh belt is partially converted into the longitudinal component force applied to the pressing rollers and the sludge due to the influence of the pressing roller body. Therefore, the increased tension applied by the cylinder cannot be effectively and completely applied to the sludge. However, if the squeezing pressure is indirectly increased by simply tensioning the filter belt, even without considering the effect of mesh belt elongation, the frame and pressing rollers of the belt filter press cannot withstand the working conditions under high tension loads for a long time, which brings new hidden dangers to the equipment and the life of the mesh belt.

[0006] Therefore, without changing the main structure and filtration method of traditional belt filter press equipment, how to further provide localized, targeted, and adjustable pressure through other means while maintaining appropriate tension of the filter belt to improve the dewatering effect is a technical point that urgently needs to be solved in this field. Utility Model Content

[0007] The purpose of this invention is to address the problems existing in the prior art by providing a top roller belt filter press.

[0008] The objective of this utility model is achieved through the following technical solution:

[0009] A top-roller belt filter press includes a frame that forms the main support of the equipment, an upper filter belt and a lower filter belt, each with an independent annular structure, a plurality of guide rollers that support and guide the upper and lower filter belts and are arranged across the frame, a pressing zone formed by a plurality of pressing rollers arranged in an S-shape, and a tensioning mechanism for tightening the upper and lower filter belts. The top-roller belt filter press further includes a top roller mechanism. At least one pressing roller in the pressing zone is equipped with a top roller mechanism. The top roller mechanism and the corresponding pressing roller are located on opposite sides of the overlapping upper and lower filter belts, and at least one of the matching pressing rollers and the top roller mechanism is configured to move closer to each other to apply additional vertical pressure to the overlapping upper and lower filter belts or move away from each other.

[0010] The pressing roller is equipped with a top roller mechanism and / or multiple top roller mechanisms.

[0011] The top roller mechanism is located above the press roller, and the top roller in the top roller mechanism is tangent to the top surface of the upper filter belt, and the roller surface of the corresponding press roller is wrapped with the lower filter belt; or the top roller mechanism is located below the press roller, and the top roller in the top roller mechanism is tangent to the bottom surface of the lower filter belt, and the roller surface of the corresponding press roller is wrapped with the upper filter belt.

[0012] All pressing rollers in the pressing zone are equipped with top roller mechanisms or are equipped with top roller mechanisms at intervals.

[0013] The diameter of each pressing roller in the pressing zone gradually decreases along the direction of the filter belt, or the diameter of each pressing roller in the pressing zone is the same.

[0014] The top roller mechanism is configured to move closer to or further away from the fixedly mounted press roller. The top roller mechanism consists of at least one top roller unit. The top roller unit, arranged in an arc along the outer side of the press roller, includes a top roller, a fixed base, a slide rail, a slide bearing, and a linear actuator. The top roller is arranged on the slide bearing on the circumferential side of the press roller. The slide bearing is slidably connected to the slide rail, and the slide rail is perpendicular to the fixed base. The linear actuator mounted on the fixed base can drive the slide bearing to reciprocate on the slide rail, thereby causing the top roller to move closer to or further away from the press roller. A pressure sensor for detecting pressure values ​​is provided between the linear actuator and the slide bearing.

[0015] The pressing roller is configured to move closer to or further away from a fixedly mounted top roller mechanism. The top roller in the top roller mechanism is fixedly mounted, and the pressing roller is arranged on a slide bearing located on the periphery of the top roller. The slide bearing is slidably connected to a slide rail, and the slide rail is perpendicular to the fixed base. A linear actuator mounted on the fixed base can drive the slide bearing to reciprocate on the slide rail, thereby causing the pressing roller to move closer to or further away from the top roller. A pressure sensor for detecting pressure values ​​is provided between the linear actuator and the slide bearing.

[0016] The linear actuators that drive the movement of the top roller in the press roller and / or top roller mechanism are capable of independent displacement control of each other; the displacement distance X provided by the linear actuator must be not less than the maximum distance between the top roller mechanism and the press roller; the linear actuator includes, but is not limited to, an electric cylinder or a pneumatic cylinder.

[0017] The tensioning mechanism includes a tensioning roller and tensioning cylinders disposed on both sides of the tensioning roller. The tensioning roller is fixedly connected to the front end of the piston rod of the tensioning cylinder and is configured to move synchronously with the piston rod of the tensioning cylinder. The stroke of the tensioning cylinder is 100-350mm and the cylinder diameter is 100-250mm.

[0018] The top roller belt filter press also includes a correction device and a backwashing mechanism respectively set on the running paths of the upper and lower filter belts, and a mud discharge roller and a lower mud discharge roller with a rotation drive device set downstream of the running direction of the pressing roller; the backwashing mechanism can provide a high-pressure water source of 0.3Mpa-0.6Mpa to the upper or lower filter belt; the correction device includes a correction sensor, a correction roller, and two correction cylinders set at both ends of the correction roller, and the two correction cylinders simultaneously drive the correction roller to adjust based on the signals of the corresponding correction sensor.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] This utility model of a top roller belt filter press innovatively adds a top roller mechanism to the pressing roller in the traditional filter pressing zone. It can apply additional pressure to the overlapping upper and lower filter belts based on the changes in sludge moisture content without changing the overall mesh tension during sludge pressing. This is achieved by adjusting the contact pressure between the top roller and the pressing roller and / or adjusting the number of top rollers. Attached Figure Description

[0021] Appendix Figure 1 A schematic diagram of the structure of a top roller belt filter press provided in Embodiment 1 of this utility model;

[0022] Appendix Figure 2 A schematic diagram of the top roller unit provided in Embodiment 1 of this utility model;

[0023] Appendix Figure 3 A schematic diagram of the cooperative structure of the movable top roller mechanism and the fixedly installed press roller provided in Embodiment 1 of this utility model;

[0024] Appendix Figure 4 A schematic diagram of the operating status of the top roller and the press roller provided in Embodiment 1 of this utility model;

[0025] Appendix Figure 5 A schematic diagram of the state of a top roller belt filter press during sludge filtration, provided as an embodiment of this utility model;

[0026] Appendix Figure 6 A schematic diagram of the cooperation structure between the fixed top roller mechanism and the movable press roller provided in Embodiment 2 of this utility model;

[0027] Appendix Figure 7 This is a schematic diagram of the structure of a top roller belt filter press provided in Embodiment 3 of this utility model.

[0028] Wherein: 1—Top roller belt filter press; 11—Frame; 12—Upper filter belt; 13—Lower filter belt; 14—Guide roller; 15—Pressing zone; 151—Pressing roller; 16—Tensioning mechanism; 161—Tensioning roller; 162—Tensioning cylinder; 17—Correction mechanism; 171—Correction sensor; 172—Correction roller; 173—Correction cylinder; 18—Backwashing mechanism; 19—Top roller mechanism; 191—Top roller unit; 1911—Top roller; 1912—Fixed base; 1913—Slide rail; 1914—Slide bearing; 1915—Linear actuator; 1916—Pressure sensor; 20—Sludge to be dewatered; 21—Upper sludge discharge roller; 22—Lower sludge discharge roller. Detailed Implementation

[0029] To illustrate the technical content, structural features, achieved objectives, and effects of the invention in detail, the technical solutions of the embodiments of the invention will be described below with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of the invention, and not all embodiments. In the following description, for illustrative purposes, numerous specific details are set forth to provide a detailed description of various exemplary embodiments or implementations of the invention. However, various exemplary embodiments may also be implemented without these specific details or in one or more equivalent arrangements. Furthermore, the various exemplary embodiments may differ, but are not necessarily exclusive. For example, the specific shape, construction, and characteristics of the exemplary embodiments may be used or implemented in another exemplary embodiment without departing from the inventive concept.

[0030] Furthermore, in this invention, spatial relative terms such as “below,” “under,” “below,” “down,” “above,” “above,” “higher,” and “side” (e.g., as in a “sidewall”) are used to describe the relationship between one element and another (other) element as shown in the accompanying drawings. Spatial relative terms are intended to include different orientations of the device in use, operation, and / or manufacture other than those depicted in the drawings. For example, if the device in the drawings is flipped, an element described as “below” or “under” another element or feature would then be positioned “above” said other element or feature. Thus, the exemplary term “below” can include both above and below orientations. Furthermore, the device can be otherwise positioned (e.g., rotated 90° or in other orientations), thus interpreting the spatial relative descriptive terms used herein accordingly.

[0031] like Figure 1-7As shown: A top roller belt filter press includes a frame 11 that forms the main support of the equipment, an upper filter belt 12 and a lower filter belt 13, each with an independent annular structure, a plurality of guide rollers 14 that support and guide the upper filter belts 12 and the lower filter belts 13 and are arranged across the frame 11, a pressing zone 15 formed by a plurality of pressing rollers 151 arranged in an S-shape, a tensioning mechanism 16 for tightening the upper filter belts 12 and the lower filter belts 13, a correction device 17 and a backwashing mechanism 18 arranged on the running path of the upper filter belts 12 and the lower filter belts 13, and a mud discharge roller 21 and a lower mud discharge roller 22 with a rotation drive device arranged downstream of the running direction of the pressing rollers 151. The top roller belt filter press 1 also includes a top roller mechanism 19. At least one pressing roller 151 is provided with the top roller mechanism 19 in the pressing zone 15. The top roller mechanism 19 and the corresponding pressing roller 151 are located on both sides of the upper filter belt 12 and the lower filter belt 13 in an overlapping state, respectively. At least one of the provided pressing roller 151 and the top roller mechanism 19 is configured to move closer to each other to apply additional vertical pressure to the upper filter belt 12 and the lower filter belt 13 in an overlapping state or move away from each other.

[0032] In the above-described top-roller belt filter press, the diameter of each pressing roller 151 in the pressing zone 15 gradually decreases along the running direction of the filter belt, or the diameter of each pressing roller 151 in the pressing zone 15 is the same; a top roller mechanism 19 is provided on the pressing roller 151 and / or multiple top roller mechanisms 19 are provided on the pressing roller 151; all pressing rollers 151 in the pressing zone 15 are provided with top roller mechanisms 19 or are provided at intervals. As needed, the top roller mechanism 19 is located above the pressing roller 151 and the top roller 1911 in the top roller mechanism 19 is tangent to the upper surface of the upper filter belt 12, and the lower filter belt 13 is wrapped on the roller surface of the pressing roller 151; or the top roller mechanism 19 is located below the pressing roller 151 and the top roller 1911 in the top roller mechanism 19 is tangent to the bottom surface of the lower filter belt 13, and the upper filter belt 12 is wrapped on the roller surface of the pressing roller 151.

[0033] In terms of adjustment, the top roller mechanism 19 can be moved independently, the pressing roller 151 can be moved independently, or both the top roller mechanism 19 and the pressing roller 151 can be moved.

[0034] When the top roller mechanism 19 is configured to move closer to or further away from the fixedly installed press roller 151, the top roller mechanism 19 is composed of at least one top roller unit 191. The top roller unit 191, which is arranged in an arc along the outer side of the press roller 151, includes a top roller 1911, a fixed base 1912, a slide rail 1913, a slide bearing 1914, and a linear actuator 1915. The top roller 1911 is arranged on a pair of slide bearings 1914 on the circumferential side of the press roller 151. The slide bearings 1914 are slidably connected to the slide rail 1913, and the slide rail 1913 is arranged perpendicular to the fixed base 1912. The linear actuator 1915 provided on the fixed base 1912 can drive the slide bearings 1914 to reciprocate on the slide rail 1913, thereby driving the top roller 1911 to move closer to or further away from the press roller 151. A pressure sensor 1916 for detecting pressure values ​​is provided between the linear actuator 1915 and the slide bearings 1914.

[0035] When the pressing roller 151 is configured to move closer to or further away from the fixedly installed top roller mechanism 19, the top roller 1911 in the top roller mechanism 19 is fixedly installed, and the pressing roller 151 is arranged on the slide bearing 1914 located on the periphery of the top roller 1911. The slide bearing 1914 is slidably connected to the slide rail 1913 and the slide rail 1913 is set perpendicular to the fixed base 1912. The linear actuator 1915 provided on the fixed base 1912 can drive the slide bearing 1914 to reciprocate on the slide rail 1913, thereby driving the pressing roller 151 to move closer to or further away from the top roller 1911. A pressure sensor 1916 for detecting pressure values ​​is provided between the linear actuator 1915 and the slide bearing 1914.

[0036] In the top roller belt filter press provided by this utility model, the linear actuators 1915 that drive the pressing roller 151 and / or the top roller 1911 in the top roller mechanism 19 can achieve individual displacement control between each other. The displacement distance X provided by the linear actuator 1915 must not be less than the maximum distance between the top roller mechanism 19 and the pressing roller 151. The linear actuator 1915 includes, but is not limited to, an electric cylinder or a pneumatic cylinder.

[0037] In the top roller belt filter press provided by this utility model, the tensioning mechanism 16 includes a tensioning roller 161 and tensioning cylinders 162 disposed on both sides of the tensioning roller 161. The tensioning roller 161 is fixedly connected to the front end of the piston rod of the tensioning cylinder 162, and the tensioning roller 161 is configured to move synchronously with the piston rod of the tensioning cylinder 162. The stroke of the tensioning cylinder 162 is 100-350mm, and the cylinder diameter is 100-250mm. The backwashing mechanism 18 can provide a high-pressure water source of 0.3Mpa-0.6Mpa to the upper filter belt 12 or the lower filter belt 13. The correction device 17 includes a correction sensor 171, a correction roller 172, and two correction cylinders 173 disposed at both ends of the correction roller 172. The two correction cylinders 173 simultaneously drive the correction roller 172 to adjust based on the signal of the corresponding correction sensor 171.

[0038] Example 1

[0039] like Figure 1-5 As shown, a top-roller belt filter press includes: a frame 11 that forms the main support of the equipment; an upper filter belt 12 and a lower filter belt 13 that are independent of each other and connected end-to-end in a ring structure; a plurality of guide rollers 14 that support and guide the upper filter belts 12 and the lower filter belts 13 and are arranged across the frame 11; a pressing zone 15 formed by a plurality of pressing rollers 151 arranged in an S-shape; a tensioning mechanism 16 for tightening the upper filter belts 12 and the lower filter belts 13; a correction device 17 and a backwashing mechanism 18 arranged on the running path of the upper filter belts 12 and the lower filter belts 13; and a discharge roller 21 and a lower discharge roller 22 with a rotation drive device arranged downstream of the running direction of the pressing rollers 151. In this embodiment, the number of pressing rollers 15 in the pressing zone 15 is configured to be 7, and in other preferred embodiments, the number may be no less than 5. In this embodiment, the diameter of each pressing roller 151 in the pressing zone 15 decreases along the running direction of the upper filter belt 12 and the lower filter belt 13, so as to gradually increase the contact pressure between the pressing roller 151 and the overlapping upper filter belt 12 and lower filter belt 13.

[0040] The upper filter belt 12 and the lower filter belt 13 respectively bypass the tensioning mechanism 16 and achieve mesh tension through the displacement of the tensioning mechanism 16. In this embodiment, the tensioning mechanism 16 includes a tensioning roller 161 and tensioning cylinders 162 disposed on both sides of the tensioning roller 161. The tensioning roller 161 is fixedly connected to the piston rod of the tensioning cylinder 162. The tensioning roller 161 is configured to move synchronously with the piston rod of the tensioning cylinder 162. In this embodiment, the stroke of the tensioning cylinder 162 is 200 mm and the cylinder diameter is 120 mm.

[0041] A deviation correction device 17 and a backwashing mechanism 18 are also provided along the running paths of the upper filter belt 12 and the lower filter belt 13 to achieve deviation correction of the upper filter belt 12 and the lower filter belt 13 and regeneration cleaning after filtration. The backwashing mechanism 18 can provide a high-pressure water source of 0.3MPa-0.6MPa to the filter screen. The deviation correction device 17 consists of a deviation correction sensor 171, a deviation correction roller 172, and two deviation correction cylinders 173 set at both ends of the deviation correction roller 172. The two deviation correction cylinders 173 are configured to operate independently based on the signal of the deviation correction sensor 171. Downstream of the running direction of the pressing roller 151, an upper sludge discharge roller 21 and a lower sludge discharge roller 22 with a rotation drive device are provided. The upper sludge discharge roller 21 and the lower sludge discharge roller 22 are used to peel the sludge after filtration from the upper filter screen 12 and the lower filter screen 13, respectively. In this embodiment, the rotation drive device is a motor.

[0042] like Figure 1-3 As shown, each pressing roller 151 in the pressing zone 15 is provided with a top roller mechanism 19 on the opposite side of the upper filter belt 12 and the lower filter belt 13. At least one of the pressing rollers 151 or the top roller mechanism 19 is configured to move closer to or further away from each other. In this embodiment, the top roller mechanism 19 is configured to move toward the pressing roller 151. The top roller mechanism 19 is composed of at least one top roller unit 191, which is arranged along the outer arc of the pressing roller 151. The top roller unit 191 includes a top roller 1911 arranged on the bottom of the pressing roller 151 or symmetrically arranged on the lower sides of the pressing roller 151 in pairs on slide bearings 1914, a slide rail 1913 perpendicular to the fixed base 1912, a slide bearing 1914 slidably connected to the slide rail 1913, and a linear driver 1915 that drives the slide bearing 1914 to reciprocate on the slide rail 1913. The fixed base 1912 is fixed on the frame 11. Each top roller unit 191 on the top roller mechanism 19 can be individually displaced. The top roller mechanism 19 also includes a pressure sensor 1916 disposed between the linear driver 222, the linear driver 1915, and the slide bearing 1914-224 for detecting pressure values, used to quantify the pressure applied by the top roller mechanism 19 to the mesh surface and the pressing roller 151. In this embodiment, the top roller mechanism 19 is respectively disposed at the bottom of the first, third, fifth, and seventh pressing rollers 151, and the top roller units 191 of each top roller mechanism 19 corresponding to the pressing rollers 151 are 5, 2, 1, and 1, respectively. In other embodiments, the top roller mechanism 19 can be increased or decreased according to the actual moisture content requirements and changes in sludge quality.

[0043] To better understand the implementation process in this case, the normal implementation flow is as follows: Water-containing sludge enters the upper filter belt 12 through the feed pipe (not shown in the figure), and is fed into the pressing zone 15 under the clamping action of the wedge-shaped area formed by the intersection of the upper filter belt 12 and the lower filter belt 13. The bottom top roller mechanism 19 rises to the bottom of the pressing roller 151, contacting the upper filter belt 12 and the lower filter belt 13 wrapped around the pressing roller 151 and further applying a set pressure value. For example... Figure 5 As shown, the outer surface of the pressing roller 151 is wrapped by an upper filter belt 12 and a lower filter belt 13, with the sludge 20 to be dewatered sandwiched between the upper filter belt 12 and the lower filter belt 13. The tensioning cylinder 16 of the belt filter press tensions the upper filter belt 12 and the lower filter belt 13, generating initial pressure at the S-shaped pressing roller 151 to dewater the sludge. Additional vertical pressure is provided to each pressing roller 151 through the top roller mechanism 19, and efficient pressing and dewatering are completed as the sludge passes through the pressing zone 15 composed of 7 pressing rollers 151.

[0044] The results of a municipal sewage sludge dewatering test are shown in Table 1. Without changing any other conventional settings such as sludge filter press dosage and sludge feed rate, the moisture content can be further reduced by about 4 percentage points by the additional vertical pressure provided by the top roller mechanism 19.

[0045] Table 1 Results of sludge dewatering test in a municipal sewage system

[0046]

[0047] Example 2

[0048] like Figure 6 As shown, in Embodiment 2, additional vertical pressure is provided by the press roller 151. While maintaining the same structure as in Embodiment 1, the top roller 1911 can also be configured to be fixed. The press roller 151 of the pressing zone 15 is configured to move towards the top roller 1911. Each top roller unit 191 includes a fixed base 1912, a slide rail 1913, a slide bearing 1914, and a linear actuator 1915. The press roller 151 is arranged on a pair of slide bearings 1914 arranged on the circumferential side of the top roller 1911. 914 is slidably connected to slide rail 1913 and slide rail 1913 is set perpendicular to fixed base 1912. Linear driver 1915 set on fixed base 1912 can drive slide bearing 1914 to reciprocate on slide rail 1913, thereby driving press roller 151 to move closer to or away from top roller 1911. Fixed base 1912 is fixed on frame 11. Similarly, pressure sensor 1916 is used to detect pressure value between linear driver 222, linear driver 1915 and slide bearing 1914.

[0049] It should be noted that when adjusting the press roller 151 provided in Embodiment 2, the tensioning mechanism 16 needs to be adjusted accordingly.

[0050] Example 3

[0051] like Figure 7 As shown, the difference between the top roller belt filter press provided in Embodiment 3 and Embodiment 1 is that the diameter of each pressing roller 151 in the pressing zone 15 is the same and the number of top roller units 191 of each top roller mechanism 19 corresponding to each pressing roller 151 is 5.

[0052] This utility model of a top roller belt filter press innovatively adds a top roller mechanism to the pressing roller in the traditional filter pressing zone. It can apply additional pressure to the overlapping upper filter belt 12 and lower filter belt 13 based on the changes in sludge moisture content without changing the overall mesh tension, thereby achieving a higher dewatering effect. This is achieved by adjusting the contact pressure between the top roller 1911 and the pressing roller 151 and / or adjusting the number of top rollers 1911.

[0053] In this embodiment of the invention, the term "multiple" refers to two or more, unless otherwise explicitly defined. The terms "install," "connect," and "fix" should be interpreted broadly. For example, "connect" can mean a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention based on the specific circumstances.

[0054] In the description of the embodiments of this utility model, it should be understood that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific direction or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0055] In this specification, the terms "an embodiment," "a preferred embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0056] The above embodiments are only for illustrating the technical concept of this utility model and should not be construed as limiting the scope of protection of this utility model. Any modifications made to the technical solution based on the technical concept proposed by this utility model shall fall within the scope of protection of this utility model. Technologies not covered by this utility model can be implemented by existing technologies.

Claims

1. A top roller belt filter press, comprising a frame (11) forming the main support of the equipment, an upper filter belt (12) and a lower filter belt (13) each having an independent annular structure, a plurality of guide rollers (14) for supporting and guiding the upper filter belt (12) and the lower filter belt (13) and spanning across the frame (11), a pressing zone (15) formed by a plurality of pressing rollers (151) arranged in an S-shape, and a tensioning mechanism (16) for tightening the upper filter belt (12) and the lower filter belt (13), characterized in that: The top roller belt filter press (1) also includes a top roller mechanism (19). At least one pressing roller (151) in the pressing zone (15) is equipped with the top roller mechanism (19). The top roller mechanism (19) and the corresponding pressing roller (151) are located on both sides of the upper filter belt (12) and the lower filter belt (13) in an overlapping state, respectively. At least one of the matching pressing roller (151) and the top roller mechanism (19) is configured to move closer to each other to apply additional vertical pressure to the upper filter belt (12) and the lower filter belt (13) in an overlapping state or move away from each other.

2. The top roller belt filter press according to claim 1, characterized in that: The pressing roller (151) is equipped with a top roller mechanism (19) and / or the pressing roller (151) is equipped with multiple top roller mechanisms (19).

3. The top roller belt filter press according to claim 1, characterized in that: The top roller mechanism (19) is located above the press roller (151), and the top roller (1911) in the top roller mechanism (19) is tangent to the top surface of the upper filter belt (12), and the lower filter belt (13) is wrapped on the roller surface of the press roller (151); or the top roller mechanism (19) is located below the press roller (151), and the top roller (1911) in the top roller mechanism (19) is tangent to the bottom surface of the lower filter belt (13), and the upper filter belt (12) is wrapped on the roller surface of the press roller (151).

4. The top roller belt filter press according to claim 1, characterized in that: The pressing rollers (151) in the pressing zone (15) are all equipped with top roller mechanisms (19) or are equipped with top roller mechanisms (19) at intervals.

5. The top roller belt filter press according to claim 1, characterized in that: The diameter of each pressing roller (151) in the pressing zone (15) gradually decreases along the running direction of the filter belt, or the diameter of each pressing roller (151) in the pressing zone (15) is the same.

6. The top roller belt filter press according to any one of claims 1-5, characterized in that: The top roller mechanism (19) is configured to move closer to or further away from the fixedly mounted press roller (151). The top roller mechanism (19) consists of at least one top roller unit (191). The top roller unit (191), arranged in an arc along the outer side of the press roller (151), includes a top roller (1911), a fixed base (1912), a slide rail (1913), a slide bearing (1914), and a linear actuator (1915). The top roller (1911) is arranged on the slide bearing (1914) on the circumferential side of the press roller (151). The slide bearing (1914) is slidably connected to the slide rail (1913), and the slide rail (1913) is set perpendicular to the fixed base (1912). The linear actuator (1915) set on the fixed base (1912) can drive the slide bearing (1914) to reciprocate on the slide rail (1913), thereby driving the top roller (1911) to move closer to or away from the press roller (151). A pressure sensor (1916) for detecting pressure value is provided between the linear actuator (1915) and the slide bearing (1914).

7. The top roller belt filter press according to any one of claims 1-5, characterized in that: The pressing roller (151) is configured to move closer to or further away from the fixedly mounted top roller mechanism (19). The top roller (1911) in the top roller mechanism (19) is fixedly mounted. The pressing roller (151) is arranged on a slide bearing (1914) located on the periphery of the top roller (1911). The slide bearing (1914) is slidably connected to a slide rail (1913), and the slide rail (1913) is perpendicular to the fixed base (1912). A linear actuator (1915) mounted on the fixed base (1912) can drive the slide bearing (1914) to reciprocate on the slide rail (1913), thereby driving the pressing roller (151) to move closer to or further away from the top roller (1911). A pressure sensor (1916) for detecting pressure values ​​is provided between the linear actuator (1915) and the slide bearing (1914).

8. The top roller belt filter press according to any one of claims 1-5, characterized in that: The linear actuators (1915) that drive the press roller (151) and / or the top roller (1911) in the top roller mechanism (19) are capable of individual displacement control relative to each other; the displacement distance X provided by the linear actuators (1915) shall not be less than the maximum distance between the top roller mechanism (19) and the press roller (151); the linear actuators (1915) include, but are not limited to, electric cylinders and pneumatic cylinders.

9. The top roller belt filter press according to any one of claims 1-5, characterized in that: The tensioning mechanism (16) includes a tensioning roller (161) and tensioning cylinders (162) disposed on both sides of the tensioning roller (161). The tensioning roller (161) is fixedly connected to the front end of the piston rod of the tensioning cylinder (162). The tensioning roller (161) is configured to move synchronously with the piston rod of the tensioning cylinder (162). The stroke of the tensioning cylinder (162) is 100-350mm and the cylinder diameter is 100-250mm.

10. The top roller belt filter press according to any one of claims 1-5, characterized in that: The top roller belt filter press (1) further includes a correction device (17) and a backwashing mechanism (18) respectively set on the running paths of the upper filter belt (12) and the lower filter belt (13), and a mud discharge roller (21) and a lower mud discharge roller (22) with a rotation drive device set downstream of the running direction of the pressing roller (151); the backwashing mechanism (18) can provide a high-pressure water source of 0.3Mpa-0.6Mpa to the upper filter belt (12) or the lower filter belt (13); the correction device (17) includes a correction sensor (171), a correction roller (172), and two correction cylinders (173) set at both ends of the correction roller (172). The two correction cylinders (173) simultaneously drive the correction roller (172) to adjust based on the signal of the corresponding correction sensor (171).

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