A fiber cloth filter

Abstract

The present invention relates to the technical field of sewage filtration, and in particular to a fiber cloth filter, including a filtering mechanism and a pressure generating mechanism, wherein the filtering mechanism includes a filtering chamber connected to the outside, and a fiber filter cloth is arranged around the outside of the filtering chamber to form a filtering layer outside the filtering chamber to filter out suspended matter in the liquid passing into the filtering chamber. The fiber cloth filter can accelerate the fluid flowing through the fiber filter cloth to a specific rate by making the pressure difference on both sides of the fiber filter cloth within a selected range, and in combination with the selected fiber filter cloth that meets the specific fiber fluff length and air permeability requirements, the fluff layer on the surface of the fiber filter cloth can form a dense filtering layer under the pressure of the liquid at a specific flow rate, thereby improving the filtering accuracy, and because there is a continuous pressure difference on both sides of the fiber filter cloth, the filtering flow rate of the fiber cloth filter in the present application will also be correspondingly improved compared to the traditional fiber rotary filter.

Description

Technical Field

[0001] The invention relates to a fiber cloth filter, in particular to a fiber cloth filter with both high precision and large flow rate. Background Art

[0002] In the deep treatment of water resources and sewage treatment technology, the fiber disc filter, as a key device, plays an important role in improving the efficiency of water resource utilization. It filters sewage through fiber cloth to achieve wastewater purification and recycling. However, in this process, traditional fiber disc filtration technology faces significant limitations and challenges:

[0003] Insufficient filtration efficiency for small particles: When treating sewage containing fine particles, traditional fiber rotary filters mainly rely on the adsorption effect of fibers on the fiber cloth for filtration. However, due to the small pressure difference between the inside and outside of the fiber cloth, the fiber structure is too fluffy, which makes the interception and adsorption of small particles unsatisfactory.

[0004] The overall filtration flow rate is slow and the efficiency is low: When treating sewage, the traditional fiber rotary filter needs to keep the filtration flow rate per unit area as small as possible in order to ensure the adsorption effect of the fiber. This not only reduces the filtration efficiency, but also limits the applicability in deep water treatment applications with high flow requirements. Specifically, when the filtration accuracy is 10um and the filtration area is 1㎡, the flow rate of the traditional rotary fiber filter is generally 15m 3 / hr, at this time the operating pressure difference on both sides of the fiber filter cloth is 3Kpa. It can be seen that the traditional method is mainly based on low flow rate adsorption filtration.

[0005] Based on the above problems, technicians in related fields are motivated to use pressure generating components to speed up the speed of water flowing through the filter cloth. Moreover, it can be imagined that the fibers on the surface of the filter cloth will fall over and be compacted when the water flows rapidly, thereby improving the filtration accuracy. However, in actual use, simply increasing the pressure to improve the filtration accuracy and increase the filtration flow rate will often backfire, and ultimately cause a decrease in filtration accuracy. Specifically, this is because the length and density of the fiber fluff on the fiber filter cloth in the traditional fiber rotary filter and the pressure difference on both sides of the fiber filter cloth are difficult to form a good match. Therefore, the existing fiber rotary filter needs to optimize its own filtration flow rate while improving the filtration efficiency of small particles, so as to better meet the needs of deep treatment of water resources. Summary of the invention

[0006] The object of the present invention is to provide a fiber cloth filter which can improve the filtering flow rate while ensuring high-precision filtering.

[0007] The technical solution adopted by the present invention to solve the above problem is: a fiber cloth filter, comprising:

[0008] The filter mechanism includes a filter cavity communicated with the outside, and a fiber filter cloth is arranged around the outside of the filter cavity to form a filter layer outside the filter cavity to filter out pollutants in the liquid passing into the filter cavity.

[0009] The pressure generating mechanism includes a pressure generating component connected to the interior of the filter chamber. After operation, the pressure generating component forms an initial pressure difference on both sides of the fiber filter cloth, and the direction in which the pressure gradient of the initial pressure difference decreases is the same as the direction pointing to the interior of the filter chamber, so that external liquid passes through the fiber filter cloth and enters the filter chamber.

[0010] The fiber filter cloth includes a skeleton layer woven by a plurality of warp yarns and a plurality of weft yarns, and one side of the skeleton layer is provided with a fluff layer composed of a plurality of fiber fluffs, the length of the fiber fluffs is at least 12 mm, and the density of the fiber fluffs should be configured to meet the requirement that when a pressure difference of 100 Pa is applied on both sides of the fiber filter cloth with an area of ​​20 square centimeters, after the air flow passes through the fiber filter cloth along the direction of the fluff layer toward the skeleton layer, the air flow velocity on the side of the skeleton layer is at most 620 mm / s.

[0011] The initial pressure difference should be configured to meet the following requirements: after the fiber cloth filter is immersed in liquid, the liquid flows toward the inside of the filter cavity at a rate of at least 70 m / h under the action of the initial pressure difference, and the fluff layer is squeezed by the flowing liquid to form a filter layer, thereby reducing the particle size of pollutants that can pass through the fiber filter cloth.

[0012] Preferably, the initial pressure difference ranges from 12 kPa to 50 kPa.

[0013] Preferably, the pressure generating mechanism also includes a drainage component connected to the interior of the filter chamber, the internal space of the drainage component and the interior of the filter chamber constitute a flow channel, the water inlet of the pressure generating component is connected to the drainage end of the flow channel, and the pressure generating component is configured to make the internal environment of the flow channel a negative pressure state during operation to increase the rate at which liquid passes through the fiber filter cloth.

[0014] Preferably, the pressure generating mechanism further comprises a drainage component communicated with the interior of the filter chamber, and the internal space of the drainage component and the interior of the filter chamber form a flow channel.

[0015] The fiber cloth filter also includes a supporting mechanism, which also includes a plurality of side walls. The plurality of side walls are arranged to form a closed accommodating space. The filtering mechanism and the drainage assembly are both arranged in the accommodating space. In addition, a water inlet hole and a drainage hole are constructed on the side wall. The water outlet of the pressure generating assembly is connected to the water inlet hole to transport the liquid into the accommodating space to form a positive pressure in the fluff layer, so that the external liquid passes through the fiber filter cloth. The drainage end of the flow channel is connected to the drainage hole to discharge the filtered liquid out of the accommodating space.

[0016] Preferably, the filtering mechanism includes a plurality of disc filter units, each of which includes a turntable assembly, a filter chamber is constructed inside the turntable assembly, and an outer surface of the turntable assembly is constructed with a filter groove connected to the filter chamber to introduce liquid into the filter chamber, and a fiber filter cloth is arranged around the outside of the turntable assembly to form a filter layer on the water inlet side of the filter groove to filter out particulate matter in the fluid entering the filter groove.

[0017] Each turntable assembly includes two annular supports that are arranged opposite to each other, and the two annular supports that are arranged opposite to each other are each configured with an annular inner edge and an annular outer edge that are arranged coaxially.

[0018] Two relatively disposed annular inner edges are each constructed with a first annular flange on both sides thereof, and a first drainage groove is constructed on the circumferential side of the first annular flange, while two relatively disposed annular outer edges are each constructed with a second annular flange on both sides thereof, and the radius dimension of the first annular flange is smaller than the radius dimension of the second annular flange.

[0019] The filter cavity in each turntable assembly is surrounded by two oppositely disposed annular supports, two first annular flanges and two second annular flanges in the turntable assembly, and the filter groove is constructed on the opposite sides of the two oppositely disposed annular supports in the turntable assembly.

[0020] The drainage assembly includes a first drainage tube connected to a plurality of turntable assemblies. The first drainage tube is inserted into the annular inner edge of the annular support. A second drainage groove is constructed on the circumferential side of the first drainage tube. The second drainage groove is arranged opposite to the first drainage groove to introduce the liquid in the filter chamber into the first drainage tube, and the first drainage tube is configured to rotate synchronously with the filtering mechanism.

[0021] The drainage assembly also includes a second drainage tube that is connected to the first drainage tube and coaxially arranged. The second drainage tube is restricted to a fixed state. The end of the first drainage tube away from the filtering mechanism is sealed with the second drainage tube through a mechanical seal. The second drainage tube is configured with a drainage port for discharging fluid.

[0022] Preferably, the fiber cloth filter also includes a driving mechanism, which includes a central axis arranged at the center of a plurality of disc filter units and a driving assembly for driving the central axis to rotate, the central axis is coaxially arranged in the first drainage tube, and both ends of the central axis extend to the outside of the first drainage tube and the outside of the second drainage tube respectively, the peripheral side of the central axis is fixedly connected to the inner wall of the first drainage tube through a connecting part, and the connecting part is configured with a channel for liquid to pass through.

[0023] The driving assembly comprises a driver and a transmission assembly. The driver is connected to the central shaft through the transmission assembly so that the plurality of disc filter units rotate synchronously with the central shaft.

[0024] Preferably, each annular support member also includes an annular side surface, the annular inner edge is arranged on the inner circumference of the annular side surface, the annular outer edge is arranged on the outer circumference of the annular side surface, the annular side surface is composed of a plurality of transverse ribs and a plurality of longitudinal ribs, and the filter groove is a grille hole formed by connecting a plurality of transverse ribs and a plurality of longitudinal ribs.

[0025] The transverse reinforcement is a circular structure, and the longitudinal reinforcement is a strip structure. Several transverse reinforcements are distributed outward around the inner edge of the ring. The diameters of several transverse reinforcements increase from the inside to the outside. The distance between two adjacent transverse reinforcements is equal. Several longitudinal reinforcements are distributed outward from the center of the inner edge of the ring.

[0026] The distance between two adjacent transverse ribs ranges from 0.2 cm to 2 cm to enhance the structural strength of the annular support.

[0027] Preferably, the filtering mechanism comprises two end plates arranged in parallel, an annular side wall is arranged between the two end plates, and the two end plates are connected as a whole through the annular side wall.

[0028] The side surfaces of the two end plates facing each other and the inner circumference of the annular side wall are arranged to form a filter cavity. The annular side wall is provided with a plurality of filter grooves connected to the filter cavity to introduce the fluid into the filter cavity. The fiber filter cloth is arranged on the outer side of the annular side wall to form a filter layer on the water inlet side of the filter groove to filter out particulate matter in the fluid entering the filter groove.

[0029] The drainage assembly includes a first drainage tube connected to the filtering mechanism, one end of the first drainage tube is fixedly connected to the side of an end plate, and the interior of the first drainage tube is connected to the interior of the filter chamber to introduce the liquid in the filter chamber into the first drainage tube, and the first drainage tube is configured to rotate synchronously with the filtering mechanism.

[0030] The drainage assembly also includes a second drainage tube that is connected to the first drainage tube and coaxially arranged. The second drainage tube is restricted to a fixed state. The end of the first drainage tube away from the filtering mechanism is sealed with the second drainage tube through a mechanical seal. The second drainage tube is configured with a drainage port for discharging fluid.

[0031] The fiber cloth filter also includes a driving mechanism, which includes a central axis arranged at the center of the filtering mechanism and a driving assembly for driving the central axis to rotate. The central axis is coaxially arranged in the first drainage tube, and both ends of the central axis extend to the outside of the first drainage tube and the outside of the second drainage tube respectively. The peripheral side of the central axis is fixedly connected to the inner wall of the first drainage tube through a connecting part, and the connecting part is configured with a channel for liquid to pass through.

[0032] The driving assembly comprises a driver and a transmission assembly. The driver is connected to the central shaft through the transmission assembly so that the filtering mechanism and the central shaft rotate synchronously.

[0033] Preferably, the fiber cloth filter also includes a backwash mechanism, which includes a plurality of backwash components, and the plurality of backwash components correspond one to one with the plurality of disc filter units, and each backwash component includes a backwash suction cup, which is arranged opposite to the outer peripheral side of the annular side wall.

[0034] The backwash suction cup has a back-suction cavity inside, and each backwash suction cup has a back-suction port connected to the back-suction cavity on one side facing the annular side wall, and each backwash suction cup has a protrusion mechanism around the back-suction port on one side where the back-suction port is provided, so that the wall thickness of the back-suction port is equal to the length of the fiber fluff, and the width of the back-suction port is equal to 80% of the length of the fiber fluff;

[0035] The backwash mechanism also includes a suction assembly communicated with the back-suction chamber to form a negative pressure environment in the back-suction chamber to suck the filtered matter on the fiber filter cloth into the back-suction port.

[0036] The skeleton layer of the fiber filter cloth should be configured so that when a pressure difference of 100 Pa is applied on both sides of the fiber filter cloth with an area of ​​20 square centimeters, the gas flow rate on the fluff layer side is at least 700 mm / s after the air flow passes through the fiber filter cloth along the skeleton layer toward the fluff layer.

[0037] Preferably, a backwash mechanism is also included, which includes a plurality of backwash components, and the plurality of backwash components correspond one to one with the plurality of disc filter units. Each backwash component includes two oppositely arranged backwash suction cups, and the two backwash suction cups are respectively arranged on both sides of the same disc filter unit.

[0038] The backwash suction cup has a backwash cavity inside, and opposite sides of two backwash suction cups in the same backwash assembly are both configured with backwash ports connected to the backwash cavity, and opposite sides of the two backwash suction cups are both configured with convex structures around the backwash ports, so that the wall thickness of the backwash ports is equal to the length of the fiber fluff, and the width of the backwash ports is equal to 80% of the length of the fiber fluff;

[0039] The backwash mechanism also includes a suction assembly communicated with the back-suction chamber to form a negative pressure environment in the back-suction chamber to suck the filtered matter on the fiber filter cloth into the back-suction port.

[0040] The skeleton layer of the fiber filter cloth should be configured so that when a pressure difference of 100 Pa is applied on both sides of the fiber filter cloth with an area of ​​20 square centimeters, the gas flow rate on the fluff layer side is at least 700 mm / s after the air flow passes through the fiber filter cloth along the skeleton layer toward the fluff layer.

[0041] Beneficial Effects

[0042] The fiber cloth filter can accelerate the fluid flowing through the fiber filter cloth to a specific rate by making the pressure difference on both sides of the fiber filter cloth within a selected range, and by selecting a fiber filter cloth that meets the specific fiber fluff length and air permeability requirements, the fluff layer on the surface of the fiber filter cloth can form a dense filter layer under the pressure of a liquid with a specific flow rate, thereby improving the filtration accuracy, and because there is a continuous pressure difference on both sides of the fiber filter cloth, the filtration flow rate of the fiber cloth filter in this application will also be correspondingly improved compared to the traditional fiber rotary filter. Furthermore, after the filtrate in the sewage is intercepted by the filter layer, the probability of the filter pores on the skeleton layer being blocked is reduced, and in conjunction with the backwash mechanism, the service life of the fiber filter cloth is also extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 A schematic structural diagram of a fiber cloth filter according to an embodiment of the present invention is shown.

[0044] Figure 2 A schematic structural diagram of a disc filter unit according to an embodiment of the present invention is shown.

[0045] Figure 3 A partial schematic structural diagram of a disc filter unit according to an embodiment of the present invention is shown.

[0046] Figure 4 A schematic structural diagram of an annular support according to an embodiment of the present invention is shown.

[0047] Figure 5 A schematic structural diagram of a fiber filter cloth according to an embodiment of the present invention is shown.

[0048] Figure 6 A schematic structural diagram showing the connection state of a driving mechanism and a drainage assembly according to an embodiment of the present invention is shown.

[0049] Figure 7 A schematic structural diagram of a drainage assembly according to an embodiment of the present invention is shown.

[0050] Figure 8 A schematic structural diagram of a backwash assembly according to an embodiment of the present invention is shown.

[0051] Fig. 9 A schematic structural diagram of a filtering mechanism according to another embodiment of the present invention is shown.

[0052] Fig.10 The graph shows the relationship between the pressure difference on both sides of the fiber filter cloth and the flow rate and filtration accuracy when the initial pressure difference of one square meter of fiber filter cloth is 8kPa.

[0053] Fig.11The graph shows the relationship between the pressure difference on both sides of the fiber filter cloth and the flow rate and filtration accuracy when the initial pressure difference of one square meter of fiber filter cloth is 12kPa.

[0054] Fig.12 The graph shows the relationship between the pressure difference on both sides of the fiber filter cloth and the flow rate and filtration accuracy when the initial pressure difference of one square meter of fiber filter cloth is 40kPa.

[0055] Fig.13 The graph shows the relationship between the pressure difference on both sides of the fiber filter cloth and the flow rate and filtration accuracy when the initial pressure difference of one square meter of fiber filter cloth is 45kPa.

[0056] Fig.14 The graph shows the relationship between the pressure difference on both sides of the fiber filter cloth and the flow rate and filtration accuracy when the initial pressure difference of one square meter of fiber filter cloth is 60kPa.

[0057] Fig.15 The graph shows the relationship curves between the pressure difference on both sides of one square meter of fiber filter cloth and the flow rate and filtration accuracy when the initial pressure difference is 8kPa, 12kPa, 40kPa, 45kPa and 60kPa respectively.

[0058] Wherein: 1. Filter mechanism; 110. Disc filter unit; 111. Rotating disk assembly; 1111. Filter chamber; 1112. Filter tank; 1113. Annular support; 1114. Annular inner edge; 1115. Annular outer edge; 1116. First annular flange; 1117. Second annular flange; 1118. Annular side; 120. Fiber filter cloth; 121. Skeleton layer; 1211. Non-flock surface; 122. Flock layer; 1221. Fiber floc; 130. End plate; 140. Annular side wall; 2. Pressure generator Structure; 210, drainage component; 211, first drainage pipe; 2111, second drainage groove; 212, second drainage pipe; 2121, drainage port; 3, driving mechanism; 310, central axis; 320, driving component; 321, driver; 322, transmission component; 4, backwash mechanism; 410, backwash component; 411, backwash suction cup; 4111, raised structure; 4112, back-suction chamber; 4113, back-suction port; 5, water outlet component; 510, water outlet pipe; 6, supporting mechanism; 610, side wall; 620, accommodating space. DETAILED DESCRIPTION

[0059] The specific implementation methods of the present application are further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present application but are not intended to limit the scope of the present application.

[0060] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description created by the present application, unless otherwise specified, "multiple" means two or more.

[0061] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood by specific circumstances.

[0062] The technical solution of the present application is designed based on a fiber cloth filter. For the existing fiber rotary filter, the filter holes on the filter cloth can only intercept particles with larger particle sizes in the wastewater, while small particles in the wastewater need to be adsorbed and filtered out by the fibers on the surface of the filter cloth. This adsorption and filtration process is not only inefficient, but also when the flow rate fluctuates, the fiber filter rotary disk is difficult to ensure the filtration effect of the wastewater, and a large number of small particles in the wastewater will directly pass through the filter holes and be discharged into the water purification area. Therefore, the applicant proposed the solution of the embodiment of the present invention.

[0063] See also Figure 1 and Figure 5The fiber cloth filter in a preferred embodiment of the present application has the characteristics of improving the filtering speed and the filtering accuracy compared with the traditional fiber rotary filter. The fiber cloth filter includes a controlled rotating filtering mechanism 1 and a pressure generating mechanism 2. The filtering mechanism 1 includes a plurality of disc filter units 110. Each disc filter unit 110 includes a rotary disk assembly 111. The interior of the rotary disk assembly 111 is configured with a filter cavity 1111. The outer surface of the rotary disk assembly 111 is configured with a filter groove 1112 connected to the filter cavity 1111 to introduce the fluid into the filter cavity 1111. Each disc filter unit 110 also includes a fiber filter cloth 120 surrounded by the outer side of the rotary disk assembly 111 to filter the liquid entering the filter groove 1112 and filter out particulate matter in the liquid passing into the filter groove 1112. The pressure generating mechanism 2 includes a pressure generating component (not shown in the figure) and a drainage component 210 connected to the filter chamber 1111. The internal space of the drainage component 210 and the filter chamber 1111 constitute a flow channel for fluid flow (not shown in the figure). When the pressure generating component is working, an initial pressure difference greater than 12 kPa will be formed on the inner and outer sides of the fiber filter cloth 120 to increase the flow rate of the fluid flowing through the fiber filter cloth 120 to at least 70 m / h, and the direction in which the pressure gradient of the initial pressure difference decreases is the same as the direction pointing to the inside of the filter chamber 1111, so that external liquid passes through the fiber filter cloth 120 and enters the filter chamber 1111. The fiber filter cloth 120 includes a skeleton layer 121 woven by a plurality of warp yarns and a plurality of weft yarns, and one side of the skeleton layer 121 is constructed with a fluff layer 122 composed of a plurality of fiber fluffs 1221, the length of the fiber fluff 1221 is at least 12 mm, and the density of the fiber fluff 1221 should be configured to meet the requirement that when a pressure difference of 100 Pa is applied on both sides of the fiber filter cloth 120 with an area of ​​20 square centimeters, after the air flow passes through the fiber filter cloth 120 along the direction of the fluff layer 122 toward the skeleton layer 121, the air flow velocity on the side of the skeleton layer 121 is at most 620 mm / s. When the fluid is accelerated through the fiber filter cloth 120 under the action of the initial pressure difference, the fast-flowing liquid will exert a force on the fiber fluff 1221 directed to the skeleton layer 121, causing the fiber fluff 1221 to bend, twist and deform, so that the fiber fluff 1221 fits on one side of the skeleton layer 121 to form a sufficiently dense filter layer (not shown in the figure). The formation of the filter layer is directly related to the length and density of the fiber fluff 1221 and the initial pressure difference on both sides of the fiber filter cloth 120. Only when the length and density of the fiber fluff 1221 and the initial pressure difference on both sides of the fiber filter cloth 120 meet the above conditions, can the filter layer maintain a sufficiently dense state, thereby achieving the purpose of improving the filtration accuracy.Furthermore, the filtration pores of the filtration layer formed under the aforementioned conditions will be much smaller than the pores of the skeleton layer 121 itself, so that particles that can pass through the filtration layer can also pass through the pores of the skeleton layer 121, thereby reducing the possibility of clogging of the pores on the skeleton layer 121. Furthermore, as particles in the fluid are continuously intercepted on the fluff layer 122, the filtration pores of the filtration layer can be further reduced.

[0064] It should be noted that the initial pressure difference on both sides of the fiber filter cloth 120 is usually limited to between 12 kPa and 50 kPa. The initial pressure difference specifically refers to the pressure difference formed on both sides of the fiber filter cloth 120 when the pressure generating component in the fiber cloth filter proposed in this embodiment starts to work. Afterwards, as the suspended matter in the wastewater accumulates on the filter layer, the filtration accuracy of the fiber filter cloth 120 is further improved, and the pressure difference on both sides of the fiber filter cloth 120 will gradually increase.

[0065] Specifically, if a dense filter layer is to be formed by a number of fiber fluffs 1221 lying on one side of the skeleton layer 121, it is necessary to ensure the density and length of the fiber fluffs 1221, that is, the fiber fluffs 1221 must meet a certain number per unit area. However, the number of fiber fluffs 1221 is extremely large and too small to be counted. Therefore, an air permeability experiment can be selected to calibrate the density of the fiber fluff 1221 on the fiber filter cloth 120, that is, when the calibration data meets a certain value, the fiber filter cloth 120 meets the use conditions of the fiber cloth filter, and the specific calibration conditions and calibration data are as follows: the test area of ​​the fiber filter cloth 120 is 20 square centimeters, and the pressure difference on both sides of the fiber filter cloth 120 is 100 Pa. When the air flow blows to the fluff layer 122 of the fiber filter cloth 120, the air flow passing through the fiber filter cloth 120 is measured on the non-fluff surface 1211 side. When the air flow velocity is at least 700 mm / s, it indicates that the density of the fiber fluff 1221 on the fiber filter cloth 120 meets the backwash requirements described later.

[0066] In actual use, it is found that when the pressure generating component forms an initial pressure difference on both sides of the fiber filter cloth 120, the flow rate of the liquid passing through the fiber filter cloth 120 can be greater than 70 meters per hour only when the initial pressure difference is greater than 12 kPa, and the fluff layer 122 on one side of the fiber filter cloth 120 mentioned in this embodiment can be tightly attached to the surface of the skeleton layer 121 under the flushing of liquid with a flow rate of at least 70 meters per hour to form a relatively dense filter layer structure. Therefore, the size of the initial pressure difference on both sides of the fiber filter cloth 120 and the density and length of the fiber fluff 1221 on the fiber filter cloth 120 are key factors in improving the filtering accuracy of the fiber cloth filter. The following records the relevant data of the initial filtering flow rate and the initial filtering accuracy of the fiber cloth filter under different initial pressure differences of one square meter of fiber filter cloth 120, as shown in Table 1:

[0067]

[0068] Table 1

[0069] Table 1 specifically lists the numerical relationship between the starting flow and the starting accuracy corresponding to 13 groups of starting pressure differences selected from 8kPa to 60kPa. According to Table 1, the change in the starting pressure difference and the starting accuracy value is always negatively correlated, that is, the larger the starting pressure difference, the smaller the value corresponding to the starting accuracy, and when the starting pressure difference is between 8kPa-40kPa, the starting pressure difference is positively correlated with the starting flow, but after the starting pressure difference is greater than 40kPa, the change amplitude of the starting accuracy gradually decreases, and the starting pressure difference and the starting flow begin to show a negative correlation, that is, when the starting pressure difference is greater than 40kPa, as the starting pressure difference continues to increase, the starting flow will become smaller and smaller, and the frequency of the starting flow reduction will also become faster and faster. Therefore, according to Table 1, when the initial pressure difference is less than 12 kPa, the initial accuracy will decrease rapidly, and when the initial pressure difference is greater than 50 kPa, the initial accuracy changes slowly, but the initial flow rate will decrease rapidly. Therefore, setting the initial pressure difference on both sides of the fiber filter cloth 120 between 12 kPa and 50 kPa can meet most usage scenarios and take into account the use effects of high accuracy and large flow rate. For details, please refer to Figure 10-15 The curve diagram in the figure shows the relationship between the filtration accuracy and filtration flow rate of one square meter of the fiber filter cloth 120 under different initial pressure differences in this embodiment.

[0070] It should be noted that Figure 10-15 The starting pressure difference is determined by the power of the pressure generating component. When the power of the pressure generating component is determined, the starting pressure difference, starting accuracy and starting flow rate are also determined. That is, the pressure generating component limits the starting pressure difference, and the starting pressure difference limits the starting filtration accuracy. The starting filtration accuracy is the worst filtration accuracy in a single filtration scenario. Afterwards, as the intercepted objects accumulate on the filter layer, the pressure difference on both sides of the fiber filter cloth 120 will gradually increase, and the filtration effect will gradually improve, but the flow rate will decrease accordingly.

[0071] Furthermore, the fiber cloth filter in this embodiment increases the initial pressure difference by reducing the filtration area of ​​the fiber filter cloth 120 when the power of the pressure generating assembly remains unchanged. In practical applications, the required filtration flow rate and filtration accuracy can also be met by providing pressure generating assemblies of different powers or fiber filter cloths 120 of different areas.

[0072] In order to ensure the completeness and feasibility of this embodiment, it is necessary to further describe the mechanism and components in the fiber cloth filter in detail.

[0073] An alternative embodiment. See Figure 2-4 The turntable assembly 111 includes two annular supports 1113 disposed opposite to each other, and the two annular supports 1113 disposed opposite to each other are each configured with an annular inner edge 1114 and an annular outer edge 1115 disposed coaxially, wherein the two annular inner edges 1114 disposed opposite to each other are each configured with a first annular flange 1116 on both sides facing each other, and the first annular flange 1116 is configured with a first drainage groove (not shown) on the circumferential side, and the two annular outer edges 1115 disposed opposite to each other are each configured with a second annular flange 1116 on both sides facing each other. shaped flange 1117, the radius size of the first annular flange 1116 is smaller than the radius size of the second annular flange 1117. Therefore, based on the structure of the turntable assembly 111, it can be known that the filter chamber 1111 in the turntable assembly 111 is surrounded by two oppositely arranged annular supports 1113, two first annular flanges 1116 and two second annular flanges 1117 in the turntable assembly 111, and the filter tank 1112 is constructed on the opposite sides of the two oppositely arranged annular supports 1113 in the turntable assembly 111.

[0074] Specifically, two annular support members 1113 are spliced ​​to form the turntable assembly 111, each annular support member 1113 includes an annular side surface 1118, and the first annular flange 1116 and the second annular flange 1117 are formed by the inner and outer edges of the annular side surface 1118 extending toward the adjacent annular support member 1113, respectively. The filter cavity 1111 is used for the filtered water to flow. The adjacent annular support member 1113 here is another annular support member 1113 that matches the annular support member 1113.

[0075] Each annular side surface 1118 has a plurality of transverse ribs (unnumbered) and a plurality of longitudinal ribs (unnumbered), and the plurality of transverse ribs and the plurality of longitudinal ribs are spliced ​​together to form the annular side surface 1118, and the filter groove 1112 is a grille hole formed by splicing a plurality of transverse ribs and a plurality of longitudinal ribs. In the present embodiment, the transverse ribs are circular structures, and the longitudinal ribs are strip structures. The plurality of transverse ribs are distributed outwardly around the annular inner edge 1114, and the diameters of the plurality of transverse ribs increase successively from the inside to the outside, and the distance between two adjacent transverse ribs is equal. The plurality of longitudinal ribs are distributed radiating outwardly from the center of the annular inner edge 1114.

[0076] During the operation of the fiber cloth filter, if the pressure generating assembly generates a large suction force, the fiber filter cloth 120 surrounding the turntable assembly 111 may be sunken due to the excessive suction force, thereby affecting the subsequent backwashing effect, or the turntable assembly 111 may be damaged due to its own insufficient supporting strength. In order to solve this problem, in one of the embodiments, the distance between two adjacent transverse ribs is set to be less than 2 cm. Furthermore, in order to ensure the patency of the flow channel between two adjacent transverse ribs, in one of the embodiments, the distance between two adjacent transverse ribs is also set to be greater than 0.2 cm to ensure that the turntable assembly 111 has sufficient overall structural strength.

[0077] When the pressure generating assembly generates a large suction force, in addition to affecting the subsequent backwashing effect, it may also cause the turntable assembly 111 to collapse and deform. In order to solve this problem, in one embodiment, a boss may be provided on one of the two annular support members 1113, and a slot opposite to the boss may be provided on the other. The boss and the slot are both provided perpendicular to the annular support member 1113, and the boss and the slot cooperate to support the filter chamber 1111. By providing a plurality of paired bosses and slots, the supporting force of the support assembly turntable assembly 111 can be effectively improved, thereby preventing the turntable assembly 111 from collapsing.

[0078] The turntable assembly 111 has an inner side and an outer side, the inner side is formed by splicing two first annular flanges 1116, and the outer side is formed by splicing two second annular flanges 1117, the inner side and the outer side are concentric circles, and the diameter of the inner side is smaller than the diameter of the outer side. A first perforation is provided on the inner side, and a second perforation is provided on the outer side, the first perforation and the second perforation are arranged relative to each other, and the centers of the two are located on the same straight line. The turntable assembly 111 also includes a screw (not shown in the figure) and a nut (not shown in the figure) sleeved outside the screw, one end of the screw passes through the first perforation and the second perforation respectively, and is connected to the first drainage tube 211 described later, and the nut is threadedly connected at the other end of the screw to tighten the turntable assembly 111, so as to avoid the phenomenon that the inner side of the turntable assembly 111 and the tube wall of the first drainage tube 211 described later slip due to the long-term rotation of the turntable assembly 111 driven by the first drainage tube 211.

[0079] See also Figure 7The drainage assembly 210 includes a first drainage tube 211 connected to a plurality of turntable assemblies 111 and a second drainage tube 212 coaxially arranged with the first drainage tube 211. The first drainage tube 211 is inserted into the annular inner edge 1114 in the annular support 1113 and is configured to rotate synchronously with the filtering mechanism 1. A second drainage groove 2111 is constructed on the circumferential side of the first drainage tube 211. The second drainage groove 2111 is arranged opposite to the first drainage groove to introduce the liquid in the filter chamber 1111 into the first drainage tube 211. The second drainage tube 212 is connected to the first drainage tube 211, and the second drainage tube 212 is configured to restrict rotation, that is, the second drainage tube 212 is fixedly installed, and the first drainage tube 211 can rotate relative to the second drainage tube 212, and the end of the first drainage tube 211 away from the filtering mechanism 1 is sealed and connected to the second drainage tube 212 through a mechanical seal (not shown in the figure), and the second drainage tube 212 is constructed with a drain port 2121 for discharging fluid.

[0080] In order to drive the filter mechanism 1 to rotate, the present embodiment further includes a drive mechanism 3 , which includes a central shaft 310 disposed at the center of the plurality of disc filter units 110 and a drive assembly 320 for driving the central shaft 310 to rotate.

[0081] Among them, the central axis 310 is coaxially arranged in the first drainage tube 211, and the two ends of the central axis 310 extend to the outside of the first drainage tube 211 and the outside of the second drainage tube 212 respectively. The circumferential side of the central axis 310 is fixedly connected to the inner wall of the first drainage tube 211 through a connecting part, and the connecting part is constructed with a channel for liquid to pass through.

[0082] The driving assembly 320 includes a driver 321 and a transmission assembly 322. The driver 321 is connected to the central shaft 310 through the transmission assembly 322, so that the plurality of disc filter units 110 rotate synchronously with the central shaft 310. It should be noted that the portion where the central shaft 310 is connected to the driver 321 through the transmission assembly 322 is located at one end outside the first drainage pipe 211 and the second drainage pipe 212.

[0083] See also Figure 6 Specifically, in one embodiment, the driver 321 is a driving motor, and the transmission assembly 322 includes two sprockets and a transmission chain. The two sprockets are respectively installed on the central shaft 310 and the output shaft of the driving motor. The transmission chain connects the two sprockets. When the driving motor is running, the central shaft 310 will rotate under the action of the sprocket and the transmission chain, thereby driving the filtering mechanism 1 to rotate.

[0084] For another optional embodiment, see Figure 8The filter mechanism 1 includes two end plates 130 arranged in parallel, an annular side wall 140 is arranged between the two end plates 130, and the two end plates 130 are connected as a whole through the annular side wall 140. At this time, the shape of the filter mechanism 1 is similar to that of a cylinder.

[0085] The opposite sides of the two end plates 130 and the inner circumference of the annular side wall 140 are arranged to form a filter chamber 1111. The annular side wall 140 is provided with a plurality of filter grooves 1112 connected to the filter chamber 1111 to introduce the fluid into the filter chamber 1111. The fiber filter cloth 120 is arranged on the outer side of the annular side wall 140 to form a filter layer on the water inlet side of the filter groove 1112 to filter out particulate matter in the fluid entering the filter groove 1112.

[0086] The drainage assembly 210 includes a first drainage tube 211 connected to the filter mechanism 1, one end of the first drainage tube 211 is fixedly connected to the side of an end plate 130, and the interior of the first drainage tube 211 is connected to the interior of the filter chamber 1111 to introduce the liquid in the filter chamber 1111 into the first drainage tube 211, and the first drainage tube 211 is configured to rotate synchronously with the filter mechanism 1.

[0087] The drainage assembly 210 also includes a second drainage tube 212 that is connected to the first drainage tube 211 and coaxially arranged. The second drainage tube 212 is restricted to a fixed state. The end of the first drainage tube 211 that is away from the filtering mechanism 1 is sealed with the second drainage tube 212 through a mechanical seal. The second drainage tube 212 is configured with a discharge port 2121 for discharging fluid.

[0088] The fiber cloth filter also includes a driving mechanism 3, which includes a central axis 310 arranged at the center of the filter mechanism 1 and a driving assembly 320 for driving the central axis 310 to rotate. The central axis 310 is coaxially arranged in the first drainage tube 211, and both ends of the central axis 310 extend to the outside of the first drainage tube 211 and the outside of the second drainage tube 212 respectively. The peripheral side of the central axis 310 is fixedly connected to the inner wall of the first drainage tube 211 through a connecting portion, and a channel for liquid to pass through is constructed on the connecting portion.

[0089] The driving assembly 320 includes a driver 321 and a transmission assembly 322 . The driver 321 is in transmission connection with the central shaft 310 via the transmission assembly 322 , so that the filtering mechanism 1 and the central shaft 310 rotate synchronously.

[0090] The wastewater needs to be discharged from the fiber cloth filter in time after being filtered, so the fiber cloth filter also includes a water outlet component 5, and the water outlet component 5 includes a water outlet pipe 510, which is connected to the outlet of the flow channel to discharge the filtered fluid out of the flow channel.

[0091] See also Fig. 9 In one embodiment, the filter tank 1112 is the inlet of the flow channel, the drain port 2121 on the second drainage pipe 212 is the outlet of the flow channel, and the pressure generating component is connected to the drain port 2121 through the outlet pipe 510 to extract the filtered fluid and form a negative pressure on the non-fleece surface 1211 to accelerate the fluid through the fiber filter cloth 120. In another embodiment, the filter tank 1112 is the inlet of the flow channel, the drain port 2121 on the second drainage pipe 212 is the outlet of the flow channel, the fiber cloth filter also includes a supporting mechanism 6, the supporting mechanism 6 has a plurality of side walls 610, and the plurality of side walls 610 are arranged to form a closed accommodating space 620. The filter mechanism 1, the drainage assembly 210 and the backwash mechanism 4 are all arranged in the accommodating space 620, and two of the side walls 610 are respectively provided with an inlet hole (not shown in the figure) and a drain hole (not shown in the figure), the drain port of the pressure generating assembly is connected to the inlet hole to draw the fluid into the accommodating space 620 to form a positive pressure in the fluff layer 122, so that the fluid is accelerated to pass through the fiber filter cloth 120, and the drain hole is connected to the drain port 2121 through the outlet pipe 510 to discharge the filtered fluid out of the accommodating space 620.

[0092] The connection between the above-mentioned drain port 2121 and the outlet pipe 510 is sealed. The specific method of the sealed connection is the existing technology and is not limited to its specific form. It only needs to ensure that after the drain port 2121 is connected to the outlet pipe 510, no leakage occurs during drainage.

[0093] After the fiber cloth filter has been running for a period of time, a large amount of suspended matter in the wastewater will accumulate on the surface of the fiber filter cloth 120. At this time, even if the pressure difference on both sides of the fiber filter cloth 120 is increased again, the filtration volume per unit time cannot be maintained within the required range. At this time, it is necessary to clean the intercepted stains on the fiber filter cloth 120. Therefore, the fiber cloth filter also includes a backwashing mechanism 4, and the backwashing mechanism 4 includes a suction component (not shown in the figure) and a plurality of backwashing components 410. The plurality of backwashing components 410 correspond to the plurality of disc filter units 110 one by one, and each backwashing component 410 includes two relatively arranged backwashing suction cups 411, and the two backwashing suction cups 411 are arranged at the same On both sides of a disc filter unit 110, a backwash suction cup 411 is internally constructed with a back-suction chamber 4112, and opposite sides of the two backwash suction cups 411 in the same backwash assembly 410 are constructed with back-suction ports 4113 connected to the back-suction chamber 4112, and the suction assembly is connected to the back-suction chamber 4112 to form a negative pressure environment in the back-suction chamber 4112, so as to suck the suspended matter on the fiber filter cloth 120 into the back-suction chamber 4112, and one side of each backwash suction cup 411 constructed with the back-suction port 4113 is constructed with a protruding structure 4111 surrounding the back-suction port 4113, so that the wall thickness of the back-suction port 4113 is approximately equal to the length of the fiber fluff 1221, so as to ensure the backwash effect. It should be noted that the intercepted dirt on the surface of the aforementioned fiber filter cloth 120 is specifically the suspended matter intercepted by the fluff layer 122, so the backwash process is mainly aimed at the pollutants filtered out on the filter layer, and because the dense filter layer formed by the fluff layer 122 will become loose when subjected to reverse water flow, the filtered matter on the filter layer is easy to be removed. It should be noted that when the wall thickness of the back-suction port 4113 is equal to the length of the fiber fluff 1221, and the width of the back-suction port 4113 is equal to 80% of the length of the fiber fluff 1221, the backwash mechanism 4 can achieve the best backwash effect.

[0094] It should be noted that during the backwashing process, if the filtrate on the filter layer is to be sucked out smoothly, the skeleton layer 121 needs to have sufficient air permeability, that is, the skeleton layer 121 should be configured to meet the requirements of applying a 100Pa air pressure difference on both sides of the fiber filter cloth 120 with an area of ​​20 square centimeters. After the air flow passes through the fiber filter cloth 120 along the skeleton layer 121 toward the fluff layer 122, the gas flow rate on the fluff layer 122 side is at least 700 mm / s to ensure that the density of the filter pores on the skeleton layer 121 meets the use requirements, because only when the filter pores on the skeleton layer 121 can meet the back-absorption amount per unit time, the backwashing mechanism 4 will have a better backwashing effect when backwashing the fiber filter cloth 120.

[0095] It should be noted that when the fiber cloth filter in the present application is in operation, the filter mechanism 1 needs to be completely immersed in the wastewater to ensure that a sufficient pressure difference can be formed on both sides of the fiber filter cloth 120, and in one embodiment, the pressure generating component and the suction component are both water pumps. In other embodiments, the pressure generating component and the suction component can also be other, and the present application does not limit the types of the pressure generating component and the suction component.

[0096] It should be further explained that, when the main part of the filter mechanism 1 is a cylinder composed of two end plates 130 and an annular side wall 140, the number of backwash suction cups 411 is one, and the back-suction port 4113 on the backwash suction cup 411 is arranged opposite to the peripheral side of the annular side wall 140, and the length of the back-suction port 4113 is equal to or greater than the length of the cylinder.

[0097] The above contents described in this specification are merely examples of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, as long as they do not deviate from the contents of the present specification or exceed the scope defined by the claims, they shall all fall within the protection scope of the present invention.

Claims

1. A fiber cloth filter, comprising: The filter mechanism includes a filter chamber connected to the outside, and a fiber filter cloth is arranged outside the filter chamber to form a filter layer outside the filter chamber to filter out pollutants in the liquid passing into the filter chamber; The pressure generating mechanism includes a pressure generating assembly connected to the inside of the filter chamber, and the pressure generating assembly forms an initial pressure difference on both sides of the fiber filter cloth after operation, and the direction in which the pressure gradient of the initial pressure difference decreases is the same as the direction pointing to the inside of the filter chamber, so that the external liquid passes through the fiber filter cloth and enters the filter chamber; Features: The fiber filter cloth comprises a skeleton layer formed by weaving a plurality of warp yarns and a plurality of weft yarns, and a fluff layer composed of a plurality of fiber fluffs is provided on one side of the skeleton layer, the length of the fiber fluffs is at least 12 mm, and the density of the fiber fluffs should be configured to meet the requirement that when a pressure difference of 100 Pa is applied on both sides of the fiber filter cloth with an area of ​​20 square centimeters, after the air flow passes through the fiber filter cloth in the direction from the fluff layer to the skeleton layer, the air flow velocity on one side of the skeleton layer is at most 620 mm / s; The skeleton layer should also be configured to meet the requirement that when a pressure difference of 100 Pa is applied on both sides of a fiber filter cloth with an area of ​​20 square centimeters, after the air flow passes through the fiber filter cloth along the skeleton layer toward the fluff layer, the gas flow rate on the fluff layer side is at least 700 mm / s; The initial pressure difference should be configured to meet the following requirements: after the fiber cloth filter is immersed in liquid, the liquid flows toward the inside of the filter cavity at a rate of at least 70 m / h under the action of the initial pressure difference, and the fluff layer is squeezed by the flowing liquid to form a filter layer, so that the particle size of pollutants that can pass through the fiber filter cloth is reduced, and the value range of the initial pressure difference is between 12 kPa and 50 kPa.

2. A fiber cloth filter according to claim 1, characterized in that: The pressure generating mechanism also includes a drainage component connected to the interior of the filter chamber, the internal space of the drainage component and the interior of the filter chamber form a flow channel, the water inlet of the pressure generating component is connected to the drainage end of the flow channel, and the pressure generating component is configured to make the internal environment of the flow channel a negative pressure state during operation to increase the rate at which liquid passes through the fiber filter cloth.

3. A fiber cloth filter according to claim 1, characterized in that: The pressure generating mechanism also includes a drainage component connected to the interior of the filter chamber, and the internal space of the drainage component and the interior of the filter chamber form a flow channel; The fiber cloth filter also includes a supporting mechanism, which also includes a plurality of side walls. The plurality of side walls are arranged to form a closed accommodating space. The filtering mechanism and the drainage assembly are both arranged in the accommodating space. In addition, a water inlet hole and a drainage hole are constructed on the side wall. The water outlet of the pressure generating assembly is connected to the water inlet hole to transport the liquid into the accommodating space to form a positive pressure in the fluff layer, so that the external liquid passes through the fiber filter cloth. The drainage end of the flow channel is connected to the drainage hole to discharge the filtered liquid out of the accommodating space.

4. A fiber cloth filter according to claim 2 or 3, characterized in that The filter mechanism includes a plurality of disc filter units, each of which includes a rotating disc assembly, a filter cavity is constructed inside the rotating disc assembly, and a filter groove connected to the filter cavity is constructed on the outer surface of the rotating disc assembly to introduce liquid into the filter cavity, and a fiber filter cloth is arranged around the outer side of the rotating disc assembly to form a filter layer on the water inlet side of the filter groove to filter out particulate matter in the fluid entering the filter groove; Each turntable assembly includes two annular supports arranged opposite to each other, and the two annular supports arranged opposite to each other are each configured with an annular inner edge and an annular outer edge arranged coaxially; Two oppositely disposed annular inner edges are each configured with a first annular flange on both sides thereof, and a first drainage groove is configured on the circumferential side of the first annular flange, and two oppositely disposed annular outer edges are each configured with a second annular flange on both sides thereof, and the radius of the first annular flange is smaller than the radius of the second annular flange; The filter cavity in each turntable assembly is surrounded by two oppositely disposed annular supports, two first annular flanges and two second annular flanges in the turntable assembly, and the filter groove is constructed on two oppositely disposed annular supports in the turntable assembly. The drainage assembly includes a first drainage tube connected to the plurality of rotating disk assemblies, the first drainage tube is inserted into the annular inner edge of the annular support, a second drainage groove is configured on the circumference of the first drainage tube, the second drainage groove is arranged opposite to the first drainage groove, so as to guide the liquid in the filter cavity into the first drainage tube, and the first drainage tube is configured to rotate synchronously with the filtering mechanism; The drainage assembly also includes a second drainage tube that is connected to the first drainage tube and coaxially arranged. The second drainage tube is restricted to a fixed state. The end of the first drainage tube away from the filtering mechanism is sealed with the second drainage tube through a mechanical seal. The second drainage tube is configured with a drainage port for discharging fluid.

5. A fiber cloth filter according to claim 4, characterized in that: The filter further comprises a driving mechanism, the driving mechanism comprising a central shaft arranged at the center of the plurality of disc filter units and a driving assembly for driving the central shaft to rotate, the central shaft being coaxially arranged in the first drainage tube, and the two ends of the central shaft respectively extending to the outside of the first drainage tube and the outside of the second drainage tube, the peripheral side of the central shaft being fixedly connected to the inner wall of the first drainage tube through a connecting portion, and the connecting portion being configured with a channel for liquid to pass through; The driving assembly comprises a driver and a transmission assembly. The driver is connected to the central shaft through the transmission assembly so that the plurality of disc filter units rotate synchronously with the central shaft.

6. A fiber cloth filter according to claim 5, characterized in that Each annular support member further includes an annular side surface, an annular inner edge is arranged on the inner circumference of the annular side surface, an annular outer edge is arranged on the outer circumference of the annular side surface, the annular side surface is composed of a plurality of transverse ribs and a plurality of longitudinal ribs, and the filter groove is a grille hole formed by connecting the plurality of transverse ribs and the plurality of longitudinal ribs; The transverse reinforcement is a circular structure, and the longitudinal reinforcement is a strip structure. Several transverse reinforcements are distributed outward around the inner edge of the ring. The diameters of the several transverse reinforcements increase from the inside to the outside. The distance between two adjacent transverse reinforcements is equal. Several longitudinal reinforcements are distributed outward from the center of the inner edge of the ring. The distance between two adjacent transverse ribs ranges from 0.2 cm to 2 cm to enhance the structural strength of the annular support.

7. A fiber cloth filter according to claim 2 or 3, characterized in that: The filtering mechanism comprises two end plates arranged in parallel, an annular side wall is arranged between the two end plates, and the two end plates are connected as a whole through the annular side wall; The side surfaces of the two end plates facing each other and the inner circumference of the annular side wall are arranged to form a filter cavity. The annular side wall is provided with a plurality of filter grooves connected with the filter cavity to introduce the fluid into the filter cavity. The fiber filter cloth is arranged on the outer side of the annular side wall to form a filter layer on the water inlet side of the filter groove to filter out particulate matter in the fluid entering the filter groove. The drainage assembly includes a first drainage tube connected to the filter mechanism, one end of the first drainage tube is fixedly connected to the side of an end plate, and the interior of the first drainage tube is communicated with the interior of the filter cavity to introduce the liquid in the filter cavity into the first drainage tube, and the first drainage tube is configured to rotate synchronously with the filter mechanism; The drainage assembly also includes a second drainage tube that is connected to and coaxially arranged with the first drainage tube, the second drainage tube is restricted to a fixed state, one end of the first drainage tube that is away from the filtering mechanism is sealed and connected to the second drainage tube through a mechanical seal, and a drainage port for discharging fluid is configured on the second drainage tube; The fiber cloth filter also includes a driving mechanism, which includes a central shaft arranged at the center of the filter mechanism and a driving assembly for driving the central shaft to rotate, the central shaft is coaxially arranged in the first drainage tube, and the two ends of the central shaft extend to the outside of the first drainage tube and the outside of the second drainage tube respectively, the peripheral side of the central shaft is fixedly connected to the inner wall of the first drainage tube through a connecting part, and the connecting part is configured with a channel for liquid to pass through; The driving assembly comprises a driver and a transmission assembly. The driver is connected to the central shaft through the transmission assembly so that the filtering mechanism and the central shaft rotate synchronously.

8. A fiber cloth filter according to claim 7, characterized in that It also includes a backwash mechanism, which includes a plurality of backwash components, the plurality of backwash components correspond to the plurality of disc filter units one by one, each backwash component includes a backwash suction cup, and the backwash suction cup is arranged opposite to the outer peripheral side of the annular side wall; The backwash suction cup has a back-suction cavity inside, and each backwash suction cup has a back-suction port connected to the back-suction cavity on one side facing the annular side wall, and each backwash suction cup has a protrusion mechanism around the back-suction port on one side where the back-suction port is provided, so that the wall thickness of the back-suction port is equal to the length of the fiber fluff, and the width of the back-suction port is equal to 80% of the length of the fiber fluff; The backwash mechanism also includes a suction assembly connected to the back-suction chamber to form a negative pressure environment in the back-suction chamber to suck the filtered matter on the fiber filter cloth into the back-suction port; The skeleton layer of the fiber filter cloth should be configured so that when a pressure difference of 100 Pa is applied on both sides of the fiber filter cloth with an area of ​​20 square centimeters, the gas flow rate on the fluff layer side is at least 700 mm / s after the air flow passes through the fiber filter cloth along the skeleton layer toward the fluff layer.

9. A fiber cloth filter according to claim 6, characterized in that: It also includes a backwash mechanism, which includes a plurality of backwash components, and the plurality of backwash components correspond to the plurality of disc filter units one by one, and each backwash component includes two backwash suction cups arranged opposite to each other, and the two backwash suction cups are respectively arranged on both sides of the same disc filter unit; The backwash suction cup has a backwash cavity inside, and opposite sides of two backwash suction cups in the same backwash assembly are each configured with a backwash port connected to the backwash cavity, and opposite sides of the two backwash suction cups are each configured with a convex structure (4111) surrounding the backwash port, so that the wall thickness of the backwash port is equal to the length of the fiber fluff, and the width of the backwash port is equal to 80% of the length of the fiber fluff; The backwash mechanism also includes a suction assembly connected to the back-suction chamber to form a negative pressure environment in the back-suction chamber to suck the filtered matter on the fiber filter cloth into the back-suction port; The skeleton layer of the fiber filter cloth should be configured so that when a pressure difference of 100 Pa is applied on both sides of the fiber filter cloth with an area of ​​20 square centimeters, the gas flow rate on the fluff layer side is at least 700 mm / s after the air flow passes through the fiber filter cloth along the skeleton layer toward the fluff layer.

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