Efficient cloth filter

Abstract

The invention relates to the technical field of water treatment, and discloses a high-efficiency cloth filter tank, which comprises a filter tank body, one side of which is provided with a water inlet; a plurality of filtering devices are arranged in the filtering tank body at equal intervals, and the two ends of the filtering devices are detachably connected with the filtering tank body through flange mounting plates respectively; the cleaning device comprises a cleaning body and a scraping plate, one side end of the scraping plate is propped against the peripheral side wall of the filtering equipment, and the other side end of the scraping plate is communicated with the cleaning body; the control device comprises a flow sensor arranged at the water inlet, a first sensor, a second sensor and a control unit, and the control unit adjusts the cleaning frequency and sends out alarm information according to data of the flow meter; a plurality of filtering devices are detachably connected through the flange mounting disc and can be independently maintained without emptying the filter tank, and the cleaning device timely cleans dirt through the scraper to reduce blockage; the control device dynamically adjusts the cleaning frequency according to the flow, the sensor monitors the water passing efficiency and the sludge concentration, and the overall operation stability, efficiency and convenience are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water treatment, in particular to a high-efficiency filter cloth filter. BACKGROUND

[0002] As a key equipment for end-stage advanced treatment of sewage treatment plants, the filtering efficiency of the filter cloth filter directly affects the compliance rate of the effluent water quality. At present, the filter cloth filter widely used in the industry adopts an integral structure design, and the filter cloth is usually arranged in the form of a circular filter disc or an integral filter belt to realize the separation of residual sludge and suspended solids in the sewage through the interception of the filter cloth.

[0003] However, the existing filter cloth filter has the following significant technical defects in actual operation: Insufficient anti-clogging capacity: when the sludge concentration of the influent or effluent is high, the filter cloth surface is prone to rapid accumulation of a sludge layer, causing the pores of the filter cloth to be blocked, the water permeation resistance to increase suddenly, the effluent efficiency to decrease significantly, and the sewage overflow of the pool body to occur in severe cases, which not only affects the continuous operation of the treatment system, but also may cause secondary pollution.

[0004] High maintenance cost and influence on operation continuity: the cleaning device (such as a high-pressure flushing assembly and a transmission component) of the existing filter cloth filter is mostly integrated in the pool body and partially submerged underwater, and has a strong correlation with the filter cloth and the pool body structure. When the cleaning device needs to be repaired due to failure, the entire filter cloth must be emptied of sewage to operate, which causes the sewage treatment process to be interrupted, increases the downtime maintenance time and labor cost, and may cause the effluent water quality to fluctuate due to the interruption of the treatment, which is difficult to meet the requirements of continuous and stable standard discharge. SUMMARY

[0005] The purpose of the present application is to provide a high-efficiency filter cloth filter, wherein the plurality of filtering devices of the device are detachably connected through flange mounting plates, can be independently repaired without emptying the filter cloth, reduces the influence on the process and the maintenance cost, the scraper of the cleaning device cooperates with the cleaning body, timely cleans the blockage, improves the water permeation and filtration effect, the control device dynamically adjusts the cleaning frequency according to the flow, avoids improper cleaning, and the sensor monitors the water permeation efficiency and sludge concentration to timely alarm and protect the water quality, and the overall operation stability, efficiency and convenience are improved.

[0006] The present application is realized by the following technical solutions: A high-efficiency filter cloth filter, comprising: a filter pool body, one side of which is provided with an inlet; a plurality of filtering devices, which are arranged at equal intervals in the filter pool body, wherein the two ends of the filtering device are detachably connected to the filter pool body through flange mounting plates; The cleaning device comprises a cleaning body and a scraper, one side end of the scraper abuts against the peripheral side wall of the filter equipment, and the other side end of the scraper is communicated with the cleaning body; The control device comprises a flow sensor arranged at the water inlet, a first sensor for detecting the water passing efficiency of the filter equipment, a second sensor for detecting the sludge concentration of the water outlet, and a control unit, which adjusts the cleaning frequency according to the flow meter data and sends an alarm according to the first sensor data.

[0007] In the scheme, a plurality of filter equipment are detachably connected with the filter tank body through the flange mounting disc, so that a single filter equipment can be independently disassembled and maintained without emptying the entire filter tank, effectively ensuring the continuous operation of other equipment, greatly reducing the influence of maintenance on the sewage treatment process, reducing downtime and maintenance cost; the scraper in the cleaning device which abuts against the peripheral side wall of the filter equipment can directly scrape off the sludge attached to the surface of the filter equipment, and the cleaning body communicated with the scraper can timely remove the pollutants on the surface of the filter equipment, reduce the blockage, and improve the water permeability and filtering effect; the control device monitors the water inflow through the flow sensor of the water inlet, and the control unit dynamically adjusts the cleaning frequency accordingly, which can flexibly adjust the cleaning intensity according to the actual sewage load, avoiding the problems of insufficient cleaning or excessive cleaning caused by fixed cleaning frequency; at the same time, the detection of the water passing efficiency of the filter equipment by the first sensor can timely send an alarm for replacing the filter cloth, and the monitoring of the sludge concentration of each water outlet by the second sensor can accurately prompt the damage of the filter cloth, ensuring that the filter equipment is always in a good filtering state, ensuring the stable and standard water quality, and improving the operation stability, filtering efficiency and operation convenience of the filter cloth filter tank as a whole.

[0008] As an optional embodiment, the side of the filter tank body opposite to the water inlet is provided with a partition plate, which can block and buffer the water inflow, avoiding the direct impact of the water inflow on the other side wall of the filter tank body or affecting the stable operation of the filter equipment.

[0009] As an optional embodiment, the filter equipment comprises a mounting frame, a filter cloth and a rotating shaft, the filter cloth is wrapped on the mounting frame and arranged in the filter tank body in a cylindrical structure, the contact area between the filter cloth and the sewage is increased through the cylindrical structure, and the filtering efficiency per unit time is improved; The rotating shaft is arranged in the cylindrical structure and drives the cylindrical structure to rotate, the rotating shaft is hollow, the hollow cavity is communicated with the cylindrical structure, one end of the rotating shaft is communicated with the water collecting tank outside the filter tank body, forming a direct water outlet path from the filter cloth to the water collecting tank, simplifying the water flow guiding structure, reducing the retention of filtered water in the filter tank, and reducing the risk of secondary pollution.

[0010] As an optional embodiment, one side end of the filter tank body is further provided with an overflow port, which is in communication with an overflow tank. When the water level in the filter tank abnormally rises due to sudden increase in water inflow, temporary blockage of the filter cloth, or the like, the excess sewage can be timely introduced into the overflow tank through the overflow port, so as to avoid direct overflow of the sewage from the filter tank body, pollution of the surrounding environment, or soaking damage to the equipment around the filter tank. At the same time, the sewage overflowing into the overflow tank can be temporarily stored or treated subsequently, so that the sewage can be more easily controlled and treated, and the risk of secondary pollution is reduced.

[0011] As an optional embodiment, the cleaning device further comprises a baffle connected to the other side end opposite to the scraper. The baffle can effectively block the splashing or scattered sludge generated when the scraper scrapes the sludge on the peripheral sidewall of the filtering equipment, so as to prevent the sludge from spreading to other areas inside the filter tank body and polluting the unfiltered sewage or adhering to other equipment components. In combination with the communication structure of the cleaning body and the scraper, the sludge scraped by the scraper can be more concentratedly limited within the effective range of the cleaning device, so as to facilitate subsequent stable conveying of the sludge to the sludge collecting tank by the conveying belt and the like.

[0012] As an optional embodiment, the cleaning device further comprises a first driving assembly and a conveying belt. The conveying belt is arranged at the bottom of the cleaning body and conveys the collected sludge to the sludge collecting tank under the driving of the first driving assembly. The collected sludge is quickly conveyed out by the conveying belt, so as to avoid sludge accumulation at the bottom of the cleaning body and cause blockage.

[0013] As an optional embodiment, the cleaning device further comprises a water spraying cavity and a nozzle arranged at the bottom of the cleaning body. The water spraying cavity is in communication with an external water pipe, and the nozzle is connected to the cleaning body and in communication with the water spraying cavity. The spraying direction of the nozzle is arranged vertically or at an inclined angle with respect to the surface of the filtering equipment. An external water source can continuously provide water flow with a certain pressure to the nozzle. The vertical or inclined spraying angle can be used for targeted washing of the surface of the filtering equipment, especially the dead angle that may be left after scraping by the scraper. The water flow impact force can completely remove the fine sludge or stubborn impurities attached to the surface of the filter cloth, so as to form a synergistic cleaning effect with the scraper and greatly improve the cleaning effect.

[0014] As an optional embodiment, one side end of the cleaning body is connected with a pair of first limiting columns, and the bottom of the scraper is provided with a second limiting column matched with the first limiting column. The second limiting column can slide in the first limiting column. The spring provides the scraper with a pressure towards the peripheral side wall of the filtering device through the elastic force of the spring, ensures that the scraper is always tightly abutted against the surface of the filtering device, and even if there is slight shaking of the filtering device during rotation or slight wear of the scraper due to long-term use, the stable adhering state can be maintained through the expansion and contraction of the spring, and mud residues caused by not being adhered tightly are effectively avoided.

[0015] As an optional embodiment, a water outlet flange pipe is further included, one end of the water outlet flange pipe is connected with the end of the filtering device through the flange mounting disc, and the other end of the water outlet flange pipe extends outward through the filter tank body, so that the filtering device or the water outlet flange pipe can be individually disassembled when needing to be repaired or replaced, without the need of large-scale modification of the filter tank body, and the convenience of the overall modular design is adapted, wherein the water outlet flange pipe is connected with the filter tank body through a sealing device, and the sealing device can effectively block the leakage of unfiltered sewage in the filter tank body from the gap between the water outlet flange pipe and the tank body, so as to avoid the mixing of unfiltered water into the filtered water to affect the water quality.

[0016] As an optional embodiment, the second sensor is arranged corresponding to the water outlet of each filtering device, when the mud concentration of a certain water outlet is detected to be higher than a set threshold, the control unit triggers an alarm, and the dependence on manual inspection is reduced through real-time monitoring and active alarm.

[0017] Compared with the prior art, the present application has the following advantages and beneficial effects: 1. The filtering device of the present application is detachably connected with the filter tank body through the flange mounting disc, so that individual devices can be independently disassembled and repaired, without the need of emptying the entire filter tank, the problem of stopping and emptying when the cleaning device or the filtering component fails in the prior art is solved, the operation continuity is affected, the maintenance cost and downtime are greatly reduced; 2. The cleaning device of the present application integrates the scraper, the water spraying cavity and nozzle, the first driving assembly and the conveying belt, forms a combined cleaning of mechanical scraping and hydraulic flushing, compared with the single backwashing or mud scraping structure in the prior art, the surface mud of the filter cloth can be more thoroughly removed, the filter cloth congestion is effectively alleviated, and the anti-congestion ability is improved; 3. The control device of the present application further dynamically adjusts the cleaning frequency through the flow sensor, combines the first sensor for monitoring the water passing efficiency, the second sensor for accurately monitoring the mud concentration of the water outlet of each filtering device and triggering an alarm, is more accurate than the traditional fixed cleaning time or single liquid level control, can timely find the damage or congestion of the filter cloth, ensures the stability of the water outlet water quality, and avoids the overall water outlet exceeding the standard. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and form part of this application, do not constitute a limitation thereof. In the drawings: Fig. 1 This is a schematic diagram of the overall structure of the present invention; Fig. 2 This is a schematic diagram of the cleaning device of the present invention; Fig. 3 This is a schematic diagram of the cleaning process of the cleaning device of the present invention.

[0019] The attached diagram shows the markings and corresponding component names: 1-Filter body, 2-Cleaning device, 20-First drive assembly, 21-Guide channel, 22-Baffle, 23-Conveyor belt, 24-Scraper, 25-Water spray channel, 26-First limiting post, 27-Second limiting post, 28-Spring, 3-Second drive assembly, 4-Sludge collection tank, 5-Water pipe, 6-Filtration equipment, 7-Baffle, 8-Flow sensor, 9-Inlet, 10-Collection tank, 11-Rotating shaft, 12-Valve, 13-Overflow port. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention. Example 1

[0021] This embodiment 1 provides a high-efficiency filter cloth filter bed, such as Figs. 1-3 As shown, it includes a filter body 1, a filtration device 6, and a cleaning device 2; Among them, such as Fig. 1 As shown, the filter body 1 has a rectangular structure with an inlet 9 at the bottom of one side wall for introducing wastewater to be filtered. A vertical baffle 7 is provided on the side opposite to the inlet 9. The height of the baffle 7 is lower than the top of the filter body, which can buffer the impact of the incoming water flow and guide the wastewater to be evenly distributed in the filter body, avoiding direct impact on the filtration equipment 6 and affecting its stability. An overflow port 13 is also provided on the side of the filter body 1 near the top. The overflow port 13 is connected to an external overflow pool through a pipe. When the water level in the pool rises abnormally due to a sudden increase in flow or blockage of the filtration equipment, the excess wastewater can be diverted into the overflow pool to prevent wastewater from overflowing and polluting the environment, and to ensure the safety of system operation.

[0022] Among them, such as Fig. 1As shown, the filter equipment 6 can be provided in multiple sets according to the actual situation, and is arranged at equal intervals in the filter body 1. Each set of equipment is detachably connected to the side wall of the filter body 1 through flange mounting plates at both ends. The flange mounting structure is a common detachable structure, which will not be described in detail here. This detachable structure makes it easy to disassemble and maintain the filter equipment 6 individually without emptying the tank.

[0023] Specifically, each set of filtration equipment 6 includes a mounting frame, filter cloth, and a rotating shaft 11. The mounting frame is an elliptical cylindrical frame fixed to the side of the filter tank. The filter cloth covers the outer surface of the mounting frame and forms a cylindrical structure to increase the contact area with sewage and improve filtration efficiency. The rotating shaft 11 passes through the upper and lower ends of the cylindrical structure and is tensioned with the filter cloth. One end of each rotating shaft 11 is connected to the output end of the second drive component 3 outside the filter tank body 1. This end is fitted with a bearing and connected to the wall of the filter tank body 1 through a flange, thereby driving the filter cloth to rotate around the central axis of the cylindrical structure, so that each area of ​​the filter cloth is evenly in contact with sewage and subsequent cleaning devices. The rotating shaft is hollow inside, and the hollow cavity is connected to the inner space of the filter cloth in the cylindrical structure. The other end of the rotating shaft extends out of the filter tank body 1 and is connected to the external water collection tank 10. The filtered clean water can enter the inner space of the filter cloth through the filter cloth and then be guided into the water collection tank 10 for centralized discharge through the rotating shaft 11.

[0024] Among them, such as Figs. 2-3 As shown, the cleaning device 2 is provided for each group of filter devices 6, including a cleaning body, a scraper 24, a baffle 22, a first drive assembly 20, and a conveyor belt 23. The cleaning body has a trough-shaped structure and is located on the side of the filter device 6. The scraper 24 is made of elastic material, with one end tightly abutting against the outer peripheral wall of the cylindrical filter cloth, and the other end communicating with the cleaning body. It can scrape off the sludge attached to the surface as the filter cloth rotates. The baffle 22 is vertically connected to the side of the cleaning body away from the scraper 24, and its height is higher than that of the scraper 24, which can prevent... The sludge scraped off by the baffle plate splashes, preventing contamination of unfiltered wastewater; the conveyor belt 23 is laid at the bottom of the cleaning body, with one end extending to the sludge collection tank 4 outside the filter body. This extended end is connected to the guide channel 21, which is an inclined channel to facilitate the natural flow of sludge into the sludge collection tank 4. The first drive component 20 (including a servo motor and transmission gears) drives the conveyor belt 23 to transport the sludge collected in the cleaning body to the guide channel 21, and then naturally flows into the sludge collection tank 4 through the guide channel 21.

[0025] Meanwhile, the bottom of the cleaning body is equipped with a water spray channel 25, which is connected to the external high-pressure water pipe 5. Multiple nozzles are provided on the side wall of the cleaning body above the channel. The nozzle spray direction is inclined at 45° to the surface of the filter cloth, which can spray high-pressure water onto the surface of the filter cloth. Together with the scraper, it removes residual fine sludge and improves the cleaning effect.

[0026] In addition, such as Fig. 3As shown, the one side end of the cleaning body is provided with a pair of first limiting columns 26, and the bottom of the scraper 24 is provided with a first limiting column 26 in sliding fit with the first limiting column 26. A spring 28 is sleeved between each pair of first limiting columns 26 and the first limiting column 26. The spring force can always make the scraper 24 closely adhere to the surface of the filter cloth, compensate for the slight shaking of the scraper wear or the filter cloth rotation, and ensure the stable scraping effect. Example 2

[0027] This embodiment 2 provides a high-efficiency filter cloth filter based on the scheme of embodiment 1, as shown in the figure, which comprises a filter pool body 1, a plurality of filter devices 6, a cleaning device and a control device. Figs. 1-3 As shown, the control device comprises a flow sensor 8, a first sensor, a second sensor and a PLC control unit. The flow sensor 8 is arranged in the pipeline of the water inlet 9, and can monitor the water inflow in real time and transmit signals to the control unit. The first sensor is a pressure sensor arranged in the hollow shaft of the filter device 6, which is used to detect the water passing efficiency of the filter cloth (reflected by the change of water flow pressure). The second sensor is a sludge concentration detector, which is arranged at the water outlet (i.e. the connecting end of the rotating shaft 11 and the water collecting tank 10) of each group of filter devices 6, and is used to monitor the sludge concentration of the filtered water. The control unit adjusts the working frequency of the cleaning device according to the flow sensor data (the greater the flow, the higher the running frequency of the first driving assembly and the water spraying cavity). When the first sensor detects that the water passing efficiency is lower than the preset threshold, it triggers an audible and light alarm to prompt the replacement of the filter cloth. When the second sensor detects that the sludge concentration of the water outlet of a certain group exceeds the standard, it will separately alarm to prompt the damage of the filter cloth of this group.

[0028] In other embodiments, the whole device further comprises a water outlet flange pipe, one end of which is connected with the end of the filter device 6 through a flange mounting disc, and the other end of which extends outward through the filter pool body 1, and the extended end is connected with a valve 12. When replacing the filter device 6, only the valve 12 needs to be closed. In this way, the filter device 6 or the water outlet flange pipe can be separately disassembled when it needs to be repaired or replaced, without the need to make large-scale changes to the filter pool body 1. The water outlet flange pipe is connected with the filter pool body 1 through a sealing device (such as a rubber sealing ring or a mechanical seal or a dry gas sealing element), which not only ensures the stability of the connection, but also facilitates separate disassembly and maintenance.

[0029] Working principle: The sewage to be filtered enters the pool through the water inlet 9 on one side of the filter pool body 1. The baffle 7 opposite to the water inlet forms a buffer for the water flow, avoiding direct impact on the filter device 6, so that the sewage is uniformly distributed in the pool and flows through a plurality of filter devices 6 arranged at equal intervals.

[0030] The cylindrical filter cloth of the filter device 6 is covered on the mounting frame and slowly rotates under the driving of the rotating shaft. The sludge and suspended solids in the sewage are intercepted by the filter cloth. The filtered clean water enters the inside of the cylindrical structure through the inside of the filter cloth, and then is guided out to the water collecting tank outside the filter pool body 1 through the hollow rotating shaft 11.

[0031] The cleaning device 2 operates synchronously. Under the action of the spring 28 (through the sliding cooperation of the first and second limiting posts), the scraper 24 always closely abuts against the outer periphery of the filter cloth, scraping off the sludge attached to the surface as the filter cloth rotates. The water spraying channel 25 at the bottom of the cleaning body sprays high-pressure water onto the surface of the filter cloth through the nozzle (the spraying direction is vertical or at an angle), which works with the scraper to remove residual fine sludge. The scraped-off sludge is prevented from splashing by the baffle 22 and collects at the bottom of the cleaning body. Then, it is transported to the sludge collection tank 4 by the conveyor belt 23 driven by the first drive component 20.

[0032] The control device adjusts the flow rate in real time. The flow sensor 8 at the inlet 9 transmits the flow rate signal to the control unit, which then dynamically adjusts the cleaning frequency of the cleaning device accordingly (the higher the flow rate, the higher the cleaning frequency). The first sensor monitors the water flow efficiency of the filter cloth. If it is lower than the threshold, an alarm is triggered to prompt the filter cloth to be replaced. The second sensor corresponds to the outlet of each filtration device. When it detects that the sludge concentration exceeds the standard, an alarm is triggered separately to indicate that the filter cloth is damaged.

[0033] If the water level in the pool rises abnormally due to a sudden increase in flow or filter cloth blockage, the overflow port 13 will direct the excess sewage into the overflow pool to prevent overflow; the sealing device between the outlet flange pipe and the filter body can prevent unfiltered sewage from leaking and ensure stable effluent quality.

[0034] Through the above process, efficient wastewater filtration, automatic filter cloth cleaning, real-time monitoring of operating status and early warning of abnormalities are achieved, ensuring the continuous and stable operation of the filter bed.

[0035] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A high-efficiency filter cloth filter bed, characterized in that, include: The filter body (1) has an inlet (9) on one side. Multiple filtration devices (6) are provided and are arranged at equal intervals in the filter body (1). The two ends of the filtration devices (6) are detachably connected to the filter body (1) through flange mounting plates. The cleaning device (2) includes a cleaning body and a scraper (24). One side of the scraper (24) abuts against the outer peripheral sidewall of the filter device (6), and the other side of the scraper (24) is connected to the cleaning body. The control device includes a flow sensor (8) located at the inlet (9), a first sensor for detecting the water flow efficiency of the filter (6), a second sensor for detecting the sludge concentration at the outlet, and a control unit. The control unit adjusts the cleaning frequency according to the flow meter data and issues an alarm message according to the data from the first sensor.

2. The high-efficiency filter cloth filter bed according to claim 1, characterized in that, A baffle (7) is provided on the side of the filter body (1) opposite to the water inlet (9).

3. The high-efficiency filter cloth filter bed according to claim 1, characterized in that, The filtration device (6) includes a mounting frame, a filter cloth and a rotating shaft (11). The filter cloth is wrapped around the mounting frame and formed into a cylindrical structure in the filter body (1). The rotating shaft (11) passes through the cylindrical structure and drives the cylindrical structure to rotate. The rotating shaft (11) is hollow inside, and the hollow cavity is connected to the cylindrical structure. One end of the rotating shaft (11) is connected to the water collection tank (10) on the outside of the filter body (1).

4. The high-efficiency filter cloth filter bed according to claim 1, characterized in that, An overflow port (13) is also provided on one side of the filter body (1), and the overflow port (13) is connected to the overflow pool.

5. The high-efficiency filter cloth filter bed according to claim 1, characterized in that, The cleaning device (2) also includes a baffle (22) connected to the other end opposite to the scraper (24).

6. The high-efficiency filter cloth filter bed according to claim 5, characterized in that, The cleaning device (2) also includes a first drive assembly (20) and a conveyor belt (23). The conveyor belt (23) is located at the bottom of the cleaning body and, driven by the first drive assembly (20), transports the collected sludge to the sludge collection tank (4).

7. A high-efficiency filter cloth filter bed according to claim 5, characterized in that, The cleaning device (2) also includes a water spray channel (25) and a nozzle located at the bottom of the cleaning body. The water spray channel (25) is connected to an external water pipe. The nozzle is connected to the cleaning body and is connected to the water spray channel (25). The spray direction of the nozzle is set at a perpendicular or inclined angle to the surface of the filter device (6).

8. A high-efficiency filter cloth filter bed according to claim 5, characterized in that, One side of the cleaning body is connected to a pair of first limiting posts (26), and the bottom of the scraper (24) is provided with a second limiting post (27) that matches the first limiting post (26). The second limiting post (27) can slide in the first limiting post (26). A spring (28) is also provided between the first limiting post (26) and the second limiting post (27).

9. A high-efficiency filter cloth filter bed according to claim 1, characterized in that, It also includes an outlet flange pipe, one end of which is connected to the end of the filter device (6) through the flange mounting plate, and the other end of which passes through the filter body (1) and extends outward; wherein the outlet flange pipe is connected to the filter body (1) through a sealing device.

10. A high-efficiency filter cloth filter bed according to any one of claims 1-9, characterized in that, The second sensor is set for the outlet of each of the filter devices (6). When the sludge concentration at a certain outlet is detected to be higher than the set threshold, the control unit triggers an alarm.

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