Vertical paper tape intelligent filtering device capable of achieving multi-stage filtering

Abstract

The invention relates to the technical field of heavy metal-containing industrial wastewater treatment and environmental protection, in particular to a multi-stage filtering vertical paper tape intelligent filtering device which comprises a box body, and a prismatic table-shaped storage box is fixedly connected in the box body; the liquid inlet hopper is fixedly connected to the top wall of the box body, and a liquid outlet of the liquid inlet hopper is located over the storage box; the cloth supplying reel and the cloth collecting reel are rotationally connected to the two sides of the lower portion in the box body respectively; and two tensioning rollers. Through the S-shaped path forming assembly, the single-roll filter cloth detours in a vertical space to form three stages of filter surfaces which are connected in series, a physical gradient of three layers of filter cloth which are vertically stacked is constructed, the structure realizes a multi-filtering effect through the single filter roll, the interception precision of fine particles (including heavy metal precipitates) is remarkably improved, and meanwhile, the filter efficiency is improved. The overall service life of the filter cloth is prolonged by reducing burden step by step, so that the contradiction between high filter precision and high consumption of a filter material is solved, and the industrial wastewater purification equipment is efficient and energy-saving.

Description

Technical Field

[0001] This invention relates to the field of heavy metal-containing industrial wastewater treatment and resource utilization technology, and in particular to a vertical paper tape intelligent filter device capable of multi-stage filtration. Background Technology

[0002] The production processes in industries such as electroplating, mining, metallurgy, and machining generate large amounts of industrial wastewater containing heavy metal ions (such as copper, nickel, chromium, and zinc) and their suspended particulate matter. If this wastewater is discharged directly without effective treatment, it will cause persistent heavy metal pollution to aquatic environments and soil, threatening ecological security and human health. Therefore, developing efficient and stable solid-liquid separation equipment is of paramount environmental importance for achieving compliant discharge of industrial wastewater and the reuse of treated wastewater.

[0003] In existing industrial wastewater treatment processes, sedimentation and filtration are key steps. Traditional vertical paper belt filters are used here due to their compact structure, but their initial design was primarily for single-media filtration. When dealing with mixed wastewater with complex composition, containing heavy metal precipitates and suspended solids of varying particle sizes, traditional single-stage filtration has significant limitations: if high-precision filter cloth is used, although it can effectively intercept heavy metal flocs and fine particles, its low dirt-holding capacity and tendency to clog lead to frequent filter cloth replacements, increasing operating costs and generating large amounts of difficult-to-dispose-of solid waste, causing secondary pollution; if lower-precision filter cloth is used, although its service life can be extended, it cannot effectively intercept fine particles, resulting in excessive heavy metal content in the effluent, making it difficult to meet increasingly stringent environmental emission standards. To improve filtration efficiency, the industry has attempted to achieve multi-stage filtration by connecting multiple independent filter units in series, but this approach results in large equipment footprints, complex piping systems, high overall pressure loss, and inconvenient maintenance, making it unsuitable for environmental retrofitting in space-constrained factories.

[0004] Therefore, in order to address the problems of difficulty in balancing single-stage filtration accuracy and filter media consumption in existing technologies, and the bulky and cumbersome nature of multi-stage series equipment, there is an urgent need to develop an intelligent filtration device with high integration, optimized filtration path, and the ability to perform gradient purification of wastewater containing heavy metals. Summary of the Invention

[0005] In order to overcome the contradiction between filtration accuracy and paper tape lifespan in existing single-stage paper tape filter devices, and the disadvantages of multi-stage series filter devices such as complex structure, large footprint and inconvenient maintenance, this invention provides a vertical intelligent paper tape filter device capable of multi-stage filtration.

[0006] A vertical paper tape intelligent filtration device capable of multi-stage filtration includes a housing with a frustum-shaped storage box fixed inside; an inlet hopper fixed to the top wall of the housing, with its outlet located directly above the storage box; a feed roll and a take-up roll rotatably connected to the two sides of the lower part of the housing; two tension rollers rotatably connected to the top of the storage box; filter cloth wound on the feed roll, with its movable end successively passing over the two tension rollers and fixed to the take-up roll, the stretched section forming a primary filtration surface; a first motor mounted on the housing, its output shaft connected to the take-up roll; an S-shaped path forming component disposed on the storage box for guiding the filter cloth to form an S-shaped path with multiple filtration surfaces; and a flow adaptive adjustment component disposed on the storage box for automatically adjusting the outlet flow rate of the inlet hopper according to the load of the primary filtration surface.

[0007] As a further preferred embodiment, the S-shaped path forming assembly includes: a layering roller located below the two tensioning rollers; a pair of sliders slidably connected to the storage box in a horizontal direction, with the layering roller rotatably connected between the two sliders; a pair of screws rotatably connected to the storage box and threadedly connected to the corresponding sliders; a pair of second motors mounted on the storage box, with their output shafts connected to the corresponding screws; and a guide roller rotatably connected to the side of the storage box; the filter cloth passes over one of the tensioning rollers, then sequentially passes over the top surface of the layering roller and the guide roller, and is then fixed to the take-up roll; the section of the filter cloth passing over the top surface of the layering roller constitutes a secondary filtration surface, and the section passing over the bottom surface of the layering roller and the top surface of the guide roller constitutes a tertiary filtration surface.

[0008] As a further preferred embodiment, the flow adaptive adjustment component includes: an adjustment plate, rotatably connected to the outlet of the inlet hopper; a pair of material supports, symmetrically rotatably connected to the component supporting the primary filter surface, with a gap between the two material supports; a pair of torsion springs, each connected between the corresponding material support and the component supporting the primary filter surface; and a connecting rod, the upper end of which is rotatably connected to the adjustment plate, and the lower end of which is rotatably connected to one of the material supports.

[0009] As a further preferred embodiment, a cleaning brush is also included, located on the housing near the left-side tension roller, with its bristles contacting the filter cloth that passes over the tension roller. When the first motor drives the filter cloth to be renewed, the section of filter cloth that has moved out of the primary filtration surface and passed over the side tension roller is cleaned by the cleaning brush and becomes a new secondary filtration surface.

[0010] As a further preferred embodiment, the system also includes a first support filter plate and a second support filter plate, both of which are fixedly attached to the storage box; the second support filter plate is located between the two tension rollers and is used to support the primary filtration surface; the first support filter plate is located below the layering rollers and is used to support the tertiary filtration surface; and a pair of material support frames in the flow adaptive adjustment assembly are rotatably connected inside the second support filter plate.

[0011] As a further preferred embodiment, each of the second motors can operate independently to drive the corresponding screw to move the two ends of the layering roller synchronously or asynchronously, thereby adjusting the tension and area of ​​each layer of the filter cloth.

[0012] As a further preferred embodiment, the system also includes an annular filter belt system for pre-filtration, disposed within the housing; the annular filter belt system includes four rollers, an annular filter belt wrapped around them, and a third motor for driving; the top surface of the filter belt is located between the liquid outlet of the inlet hopper and the primary filter surface.

[0013] As a further preferred embodiment, the four rollers in the annular filter belt system include a drive roller, a tension roller, and two redirecting rollers; the output shaft of the third motor is connected to the roller that serves as the drive roller; the filter belt surrounds the four rollers to form an inverted trapezoidal loop and encircles the storage box within it.

[0014] As a further preferred embodiment, the housing has a cleaning port, the position of which corresponds to the travel path of the annular filter belt, for discharging large particulate impurities intercepted by the filter belt.

[0015] As a further preferred embodiment, the primary, secondary, and tertiary filtration surfaces of the filter cloth are arranged sequentially in the vertical direction to form a three-stage gradient filtration path; when the annular filter belt system is included, the top surface of the filter belt and the tertiary filtration surface together form a four-stage gradient filtration path.

[0016] The beneficial effects of this invention are as follows: This invention utilizes a unique S-shaped path forming component to lay a single continuous filter cloth in a winding manner within a vertical space, forming a series of primary, secondary, and tertiary filter surfaces from top to bottom. This constructs a vertically stacked three-layer physical gradient filtration structure. This design achieves the multi-stage filtration effect that traditionally requires multiple devices connected in series using only a single roll of filter cloth. It can progressively intercept large suspended solids, heavy metal hydroxide precipitates, and fine colloidal particles in industrial wastewater, significantly improving the interception accuracy of heavy metal pollutants, ensuring stable compliance of effluent quality, and reducing heavy metal pollution emissions at the source.

[0017] This invention, through a step-by-step load reduction design, intercepts most coarse particles at the first-stage filtration surface, thereby effectively protecting the subsequent fine filtration surface and greatly extending the service life of the entire roll of filter cloth. This not only significantly reduces the frequency of filter material replacement and operating costs for users, but more importantly, it reduces the amount of hazardous solid waste (which may adsorb heavy metals) generated by frequent filter cloth replacement from the source. It is a green design with significant environmental benefits.

[0018] The device integrates a flow adaptive adjustment component, which can sense the impurity load and liquid flow impact on the primary filter surface in real time, and automatically adjust the inlet flow rate through a purely mechanical linkage structure. This effectively prevents the filter cloth from being overloaded and damaged due to fluctuations in the inlet flow rate or a sudden increase in impurities, and the risk of overflow, ensuring the continuity and stability of the wastewater treatment process and avoiding unplanned sewage discharge caused by equipment failure.

[0019] This invention highly integrates multiple functional modules, including pre-filtration, main filtration, filter cloth drive, tension adjustment, online cleaning, and flow control, into a single vertical housing. The layout is rational and the footprint is small. Its efficient pre-treatment system removes large particulate impurities first, effectively protecting the subsequent precision filtration units. The entire system is highly automated and can adaptively treat wastewater with varying pollution loads, providing an efficient, economical, and intelligent solution for clean production and environmental facility upgrades in highly polluting industries such as electroplating and metallurgy. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the front side of the three-dimensional structure of the present invention.

[0021] Figure 2 This is a rear view of the three-dimensional structure of the present invention.

[0022] Figure 3 This is a three-dimensional structural cross-sectional view of the present invention.

[0023] Figure 4 This is a three-dimensional structural diagram of the slider, screw, and layering roller components of the present invention.

[0024] Figure 5 This is a three-dimensional structural diagram of the components of the present invention, such as the liquid inlet hopper, adjusting plate, and material support frame.

[0025] Figure 6 This is a three-dimensional structural diagram of the connecting rod, torsion spring, and second bearing filter plate of the present invention.

[0026] Figure 7 This is a three-dimensional structural diagram of the storage box, roller, and filter belt of the present invention.

[0027] Figure 8 This is a three-dimensional structural diagram of the third motor, roller, and filter belt components of the present invention.

[0028] The components are: 101_box body, 102_storage box, 1021_first bearing filter plate, 1022_second bearing filter plate, 103_impurity removal port, 104_tension roller, 105_cloth feeding roll, 1051_cloth taking roll, 106_filter cloth, 1061_secondary filter surface, 1062_tertiary filter surface, 107_first motor, 108_slider, 109_layering roller, 1091_guide roller, 110_screw, 111_second motor, 201_cleaning brush, 301_liquid inlet hopper, 302_adjusting plate, 303_connecting rod, 304_material support frame, 305_torsion spring, 401_third motor, 402_roller, 403_filter belt. Detailed Implementation

[0029] The technical solution of the present invention will be further described below with reference to the accompanying drawings.

[0030] like Figures 1-3 As shown, a vertical paper tape intelligent filtration device capable of multi-stage filtration includes a housing 101, inside which is a frustum-shaped storage tank 102 for holding purified liquid. The lower rear wall of the storage tank 102 is provided with a drain pipe that extends from the back plate of the housing 101 to discharge clean water that meets discharge or reuse standards. The right side of the top wall of the housing 101 is fixed with an inlet hopper 301 for introducing industrial wastewater containing heavy metals to be filtered, and its outlet is located directly above the storage tank 102. The lower left and right sides of the housing 101 are respectively rotatably connected to a winding roller 1051 for winding up dirty filter cloth 106 and a supply roller 105 for releasing clean filter cloth 106.

[0031] The top of the storage box 102 is rotatably connected to tension rollers 104, which are symmetrically distributed on the left and right sides for tensioning and unfolding the filter cloth 106. The filter cloth 106 is wound on the feed roll 105, and its movable end passes over the two tension rollers 104 and is fixed to the take-up roll 1051. The filter cloth 106, which is horizontally spread open by the two tension rollers 104, forms a primary filter surface and is laid flat above the opening of the storage box 102.

[0032] A first motor 107 is mounted on the back plate of the housing 101, and its output shaft is fixedly connected to the rear end of the take-up roll 1051 via a coupling, for driving the filter cloth 106 to feed intermittently. The storage box 102 is provided with an S-shaped path forming component for forming a multi-layered, tortuous filtration path from a single filter cloth 106.

[0033] like Figure 4As shown, specifically, the S-shaped path forming component includes sliders 108 that are horizontally connected to the storage box 102 and distributed in the front and rear directions. A layering roller 109 for changing the orientation of the filter cloth 106 to form different levels of filter surface is rotatably connected between the two sliders 108, and is located below the two tension rollers 104.

[0034] The storage box 102 is rotatably connected to a front-to-back distributed screw 110, which is threadedly connected to the adjacent slider 108, forming a drive pair for adjusting the horizontal position of the layering roller 109; a second motor 111 distributed front-to-back is installed on the right side of the storage box 102, and the output shaft of each second motor 111 is fixed to the adjacent screw 110 through a coupling, which is used to independently drive the two ends of the layering roller 109 to move synchronously or asynchronously, so as to adjust the tension and area of ​​each layer of filter cloth 106.

[0035] The left side of the storage box 102 is rotatably connected to a guide roller 1091. After the movable end of the filter cloth 106 passes over the tension roller 104 on the left side, it will pass over the top surface of the layering roller 109 and the guide roller 1091, and finally be fixed on the take-up roll 1051, so that the filter cloth 106 is laid in an S-shape between the opening of the storage box 102 and the liquid outlet of the liquid inlet 301.

[0036] The section of the filter cloth 106 that wraps around the top surface of the layering roller 109 serves as the secondary filter surface 1061, while the section that wraps around the bottom surface of the layering roller 109 and around the top surface of the guide roller 1091 serves as the tertiary filter surface 1062. Thus, together with the primary filter surface, they achieve a series of three-stage interception and deep purification of heavy metal precipitates and suspended particles in wastewater.

[0037] The storage box 102 has a first support filter plate 1021 and a second support filter plate 1022 fixedly connected near the opening, which are used to support different levels of filter surfaces. The second support filter plate 1022 is located directly above the first support filter plate 1021 and between two tension rollers 104, and is used to support the first-stage filter surface formed by the filter cloth 106 stretched by the two tension rollers 104. The first support filter plate 1021 is located below the layering roller 109 and is used to support the third-stage filter surface 1062.

[0038] like Figure 3 As shown, specifically, the housing 101 is provided with a cleaning brush 201 near the left tension roller 104 for scraping off impurities attached to the back of the filter cloth 106, and the bristles of the brush are in close contact with the filter cloth 106 wrapped around the tension roller 104.

[0039] like Figure 5 and Figure 6As shown, specifically, the second bearing filter plate 1022 is provided with a flow adaptive adjustment component that automatically adjusts the inlet flow rate according to the load of the primary filter surface. The adjustment component includes an adjustment plate 302 that is rotatably connected to the outlet of the inlet hopper 301. Its fixed axis extends rearward to be rotatably connected to the back plate of the housing 101, and the opening of the outlet is controlled by the rotation angle.

[0040] The second support filter plate 1022 is rotatably connected to a symmetrical support frame 304 for supporting the primary filter cloth 106. Each support frame 304 is connected to the second support filter plate 1022 by a torsion spring 305. Each torsion spring 305 is wrapped around the adjacent support frame 304 so that the support frame 304 maintains a horizontal support state under normal conditions.

[0041] The two material support frames 304 are spaced apart to allow space for the material support frame 304 to flip downwards. The rear end of the right material support frame 304 is rotatably connected to a connecting rod 303. The upper end of the connecting rod 303 is rotatably connected to the rear end of the adjusting plate 302, thereby converting the flipping motion of the material support frame 304 into the rotation of the adjusting plate 302.

[0042] like Figure 7 and Figure 8 As shown, specifically, the housing 101 is equipped with an annular filter belt system for pre-filtering large particulate impurities. The annular filter belt system includes an annular filter belt 403 and four rollers 402 supporting the filter belt 403. The four rollers 402 are rotatably connected inside the housing 101, including at least one drive roller, one tension roller, and two redirecting rollers.

[0043] The filter belt 403 is wound around four rollers 402 to form an inverted trapezoidal loop. A third motor 401 is installed on the back plate of the housing 101, and its output shaft is fixedly connected to the adjacent roller 402, which serves as the drive roller, through a coupling, driving the filter belt 403 to move continuously in a cycle. The filter belt 403 surrounds the storage tank 102, and the top surface of the filter belt 403 serves as a pre-filtration surface, located between the liquid outlet of the inlet hopper 301 and the primary filtration surface.

[0044] The upper left wall of the housing 101 has a cleaning port 103 near the roller 402 on the upper left side. The filter belt 403 is close to the lower side of the cleaning port 103, so that when the filter belt 403 turns, large particles of impurities carried on its surface are scraped off by the scraper and discharged through the cleaning port 103.

[0045] First, preparations are made before filtration. The second motor 111 is started, driving the screw 110 to rotate, which in turn moves the slider 108 and the layering roller 109 horizontally, thereby pulling and tensioning the filter cloth 106 released from the feed roll 105. The filter cloth 106 sequentially passes over the right tension roller 104, the left tension roller 104, the top surface of the layering roller 109, and the guide roller 1091, and is finally fixed to the take-up roll 1051, forming a stable S-shaped meandering path above the inlet of the storage box 102, constituting the first-stage filter surface, the second-stage filter surface 1061, and the third-stage filter surface 1062 from top to bottom. At the same time, the third motor 401 is started, driving the annular filter belt 403 and its supporting roller 402 to continuously cycle.

[0046] During operation, the wastewater containing heavy metals to be purified is introduced through the inlet hopper 301 and first falls onto the top surface of the continuously moving annular filter belt 403 for pre-filtration. The filter belt 403 intercepts large suspended solids and coarse sediments and conveys them to the left. When passing through the impurity removal port 103, the impurities are scraped off the tank and collected for disposal, completing the solid waste separation.

[0047] The pre-filtered liquid passes through the filter belt 403 and falls onto the primary filtration surface formed by the filter cloth 106 for the first filtration, trapping medium-sized heavy metal flocs. The liquid then, under gravity, sequentially passes through the secondary filtration surface 1061 and the tertiary filtration surface 1062 below for the second and third filtrations, achieving fine filtration of the wastewater's fine particulate matter. Finally, the purified liquid passes through the tertiary filtration surface 1062 and flows into the storage tank 102, then is discharged through the drain pipe, ready for reuse or discharge in compliance with standards.

[0048] As filtration proceeds, the primary filter surface gradually becomes clogged due to the accumulation of impurities. At this point, the first motor 107 is activated to drive the take-up roll 1051 to rotate, pulling the entire filter cloth 106 slowly (i.e., "paper feeding"). The soiled area of ​​the filter cloth 106 is wound up, while the clean filter cloth 106 is simultaneously released from the feed roll 105, allowing the three layers of filter surfaces in the S-shaped path to be updated synchronously. As the soiled filter cloth 106 moves out of the primary filter surface and passes the left tension roller 104, the heavy metal deposits attached to its back are scraped off by the cleaning brush 201. Subsequently, this section of filter cloth 106 moves to become a new secondary filter surface 1061, thereby improving the overall utilization rate of the filter cloth 106 while ensuring the heavy metal interception effect.

[0049] The flow rate adaptive adjustment component dynamically adjusts according to the real-time load of the primary filter surface. When the inlet flow rate is too high or there are too many heavy metal impurities, the accumulated heavy metal impurities cause the filter cloth 106 at the primary filter surface to sag, pressing the material support 304 below it to overcome the torque of the torsion spring 305 and flip downwards. This movement is transmitted through the connecting rod 303, driving the adjusting plate 302 to rotate, thereby reducing the opening of the liquid outlet of the inlet hopper 301, automatically reducing the inlet flow rate, and preventing the filter cloth 106 from operating under overload.

[0050] When the load is reduced, the material support frame 304 and the adjusting plate 302 reset under the action of the torsion spring 305, and the opening of the liquid outlet is restored. This mechanism realizes the adaptive matching of the inlet flow rate and the filtration capacity, which not only avoids wastewater overflow or incomplete purification caused by flow overload, but also prevents the overall treatment efficiency from being affected by insufficient flow, ensuring the long-term stable operation of the equipment and meeting the continuous operation requirements of industrial wastewater treatment.

[0051] The above embodiments are provided for those skilled in the art to implement or use the present invention. Those skilled in the art can make various modifications or changes to the above embodiments without departing from the inventive concept of the present invention. Therefore, the protection scope of the present invention is not limited to the above embodiments, but should be the maximum scope that conforms to the innovative features mentioned in the claims.

Claims

1. A vertical paper tape intelligent filter device capable of multi-stage filtration, comprising: a housing (101) having a frustum-shaped storage box (102) fixedly connected inside. The liquid inlet hopper (301) is fixed to the top wall of the box (101), and its liquid outlet is located directly above the storage box (102); The fabric feeding roller (105) and the fabric taking roller (1051) are rotatably connected to both sides of the lower part of the box (101); Two tension rollers (104) are rotatably connected to the top of the storage box (102); The filter cloth (106) is wound on the feed roll (105), and its movable end passes around the two tension rollers (104) in sequence and is fixed to the take-up roll (1051). The stretched section forms a primary filter surface. The first motor (107) is mounted on the housing (101), and its output shaft is connected to the take-up roll (1051); Its features are, It also includes: an S-shaped path forming component, disposed on the storage box (102), for guiding the filter cloth (106) to form an S-shaped path with multiple filter surfaces; And a flow adaptive adjustment component, located on the storage tank (102), for automatically adjusting the outflow rate of the liquid inlet hopper (301) according to the load of the primary filter surface.

2. The vertical paper tape intelligent filtration device capable of multi-stage filtration as described in claim 1, characterized in that, The S-shaped path forming component includes: The layering roller (109) is located below the two tensioning rollers (104); A pair of sliders (108) are slidably connected to the storage box (102) in the horizontal direction, and the layering roller (109) is rotatably connected between the two sliders (108); A pair of screws (110) are rotatably connected to the storage box (102) and threadedly connected to the corresponding slider (108); A pair of second motors (111) are mounted on the storage box (102), and their output shafts are connected to the corresponding screws (110); And guide rollers (1091), which are rotatably connected to the side of the storage box (102); After the filter cloth (106) passes around the tension roller (104) on one side, it passes around the top surface of the layering roller (109) and the guide roller (1091) in sequence, and is then fixed to the take-up roll (1051). The section of the filter cloth (106) that wraps around the top surface of the layering roller (109) constitutes a secondary filter surface (1061), and the section that wraps around the bottom surface of the layering roller (109) and passes through the top surface of the guide roller (1091) constitutes a tertiary filter surface (1062).

3. The vertical paper tape intelligent filtration device capable of multi-stage filtration as described in claim 1, characterized in that, The adaptive flow control component includes: The regulating plate (302) is rotatably connected to the outlet of the liquid inlet hopper (301); A pair of material support brackets (304) are symmetrically and rotatably connected to the component that carries the primary filter surface, with a gap between the two material support brackets (304); A pair of torsion springs (305), each connected between the corresponding material support frame (304) and the component carrying the primary filter surface; and a connecting rod (303), the upper end of which is rotatably connected to the adjusting plate (302) and the lower end of which is rotatably connected to the material support frame (304) on one side.

4. The vertical paper tape intelligent filtration device capable of multi-stage filtration as described in claim 2, characterized in that, It also includes a cleaning brush (201) located on the housing (101) near the left side of the tension roller (104), the bristles of which contact the filter cloth (106) that passes over the tension roller (104).

5. The vertical paper tape intelligent filtration device capable of multi-stage filtration as described in claim 2, characterized in that, It also includes a first support filter plate (1021) and a second support filter plate (1022), both of which are fixed to the storage box (102); The second support filter plate (1022) is located between the two tension rollers (104) and is used to support the primary filter surface; The first support filter plate (1021) is located below the layered roller (109) and is used to support the three-stage filter surface (1062). A pair of material support frames (304) in the flow adaptive adjustment assembly are rotatably connected to the second support filter plate (1022).

6. The vertical paper tape intelligent filtration device capable of multi-stage filtration as described in claim 5, characterized in that, Each of the second motors (111) can operate independently to drive the corresponding screw (110) to move the two ends of the layered roller (109) synchronously or asynchronously, thereby adjusting the tension and area of ​​each layer of the filter cloth (106).

7. A vertical paper tape intelligent filtration device capable of multi-stage filtration as described in claim 1 or 2, characterized in that, It also includes an annular filter belt system for pre-filtration, located inside the housing (101); the annular filter belt system includes four rollers (402), an annular filter belt (403) surrounding them, and a third motor (401) for driving; the top surface of the filter belt (403) is located between the liquid outlet of the liquid inlet (301) and the primary filter surface.

8. The vertical paper tape intelligent filtration device capable of multi-stage filtration as described in claim 7, characterized in that, The four rollers (402) in the annular filter belt system include a drive roller, a tension roller and two redirecting rollers; The output shaft of the third motor (401) is connected to the roller (402) which serves as the drive roller; The filter belt (403) surrounds the four rollers (402) to form an inverted trapezoidal loop and encloses the storage box (102).

9. A vertical paper tape intelligent filtration device capable of multi-stage filtration as described in claim 8, characterized in that, The housing (101) has a cleaning port (103) which is located on the path of the annular filter belt (403) and is used to discharge large particulate impurities intercepted by the filter belt (403).

10. A vertical paper tape intelligent filtration device capable of multi-stage filtration as described in claim 9, characterized in that, The primary filter surface, secondary filter surface (1061) and tertiary filter surface (1062) of the filter cloth (106) are arranged in sequence along the vertical direction to form a three-level gradient filtration path; when the annular filter belt system is included, the top surface of the filter belt (403) and the tertiary filter surface (1062) together form a four-level gradient filtration path.

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