WO2022179078A1

WO2022179078A1 - Suction-blow filtration system

Info

Publication number: WO2022179078A1
Application number: PCT/CN2021/116492
Authority: WO
Inventors: 陈旗新; 蒋雨洁; 张冠群; 曾永平
Original assignee: 暨南大学
Priority date: 2021-02-26
Filing date: 2021-09-03
Publication date: 2022-09-01
Also published as: CN113101726A; CN113101726B

Abstract

The present invention relates to the technical field of water treatment, and more specifically, to a suction-blow filtration system, comprising a drum filtration system particularly suitable for filtering soft and clogging solids, a gas delivery system, and a liquid delivery system. The drum filtration system is connected to an intake and exhaust device by means of a suctioning and blowing control system. The drum filtration system automatically controls and manages, by means of the liquid delivery system, input of a raw liquid and discharge of a filtrate. According to the present invention, by providing the drum filtration system in communication with the gas delivery system and the liquid delivery system, a soft raw liquid is separated using a fixedly provided outer drum and a rolling inner drum; solid-liquid separation is carried out on soft solids on a filtration screen of the rolling inner drum by means of a negative pressure in the outer drum; then the solids are collected by means of air blowing, and the filtration screen is cleaned at the same time, so as to maintain the high efficiency of the filtration screen to the maximum extent while achieving high-efficiency solid-liquid separation. The present invention is particularly suitable for solving the dehydration of a sheet-like substance having high water content, such as cyanobacteria.

Description

A suction-blow filter system

technical field

The present invention relates to the technical field of water, and more particularly, to a suction-blow filter system.

Background technique

With the rapid development of domestic industry and agriculture, the water environment has deteriorated, causing the flood of cyanobacteria. Because cyanobacteria are extremely small and sticky, they can easily contaminate the filter media, resulting in a sharp drop in filter performance. Existing filtration technologies mostly use continuous pressure, which is particularly easy to plug the filter holes when filtering soft solids. Once plugged, the filter screen loses its effectiveness. Therefore, at present, filtration is rarely used to remove cyanobacteria, and only sand pools are used for water bodies with low cyanobacterial concentrations, but it will cause sand pollution.

In the invention patent with publication number CN108579199A, a cyanobacteria filter device is proposed, which filters impurities through a pre-filtering link, and is provided with a rubber scraper that can clean the cyanobacteria filter cloth, so as to keep the cyanobacteria filter medium clean, increase profit. However, the device proposed in this invention only cleans the filter medium by a rubber scraper. Since the particle size of cyanobacteria is only a few microns, it is difficult to be effectively scraped by the rubber scraper when it is embedded in the filter cloth grid, so as to restore the efficiency of the filter cloth.

SUMMARY OF THE INVENTION

The present invention provides a suction-blow filtration system to overcome the low filtration efficiency and easy blockage of the soft solids described in the prior art.

In order to solve the above-mentioned technical problems, the technical scheme adopted in the present invention is: a suction-blow filtration system, including a drum filtration system for solid-liquid separation, a gas conveying system, and a drum filtration system for conveying raw liquid and discharging filtrate. The liquid conveying system, the drum filtration system includes an outer cylinder that is sleeved and fixed on the base and a rolling inner cylinder whose cylinder wall is a filter screen. A closed space is formed between the outer cylinder and the rolling inner cylinder, and a negative The outer cylinder suction pipe of the solid body is pressed and sucked, and the rolling inner cylinder can be rolled in the circumferential direction. The drum filter system also includes a solid dehydration and purge device, a solid desorption and stripping device, and a desorption solid collection device.

In this technical solution, a suction-blow filtration system is provided with a drum filtration system that communicates with the gas conveying system and the liquid conveying system, and utilizes an outer cylinder, a rolling inner cylinder that rotates circumferentially relative to the outer cylinder, and a negative pressure outside the rolling inner cylinder. The raw liquid is separated by pressure, and the raw liquid is introduced into the rolling inner cylinder through the liquid conveying system, and the outer cylinder is pumped through the gas conveying system to form a negative pressure environment. The solids on the liquid surface filter are dehydrated and dried, and the solid desorption stripping device uses gas to blow the solids adsorbed on the filter screen by the negative pressure in the outer cylinder into the desorption solid collection device to realize the solid-liquid separation of the raw liquid.

Preferably, the outer cylinder includes an upper cylinder and a lower cylinder which are sealedly connected, and the solid desorption and blow-off device is arranged on the inner wall of the outer cylinder, including a cavity structure isolated from the negative pressure of the upper cylinder, and a space between the sealing baffles. The longitudinally distributed first opening structure, the cavity structure is enclosed by a sealing baffle and the inner wall of the upper cylinder to form a cavity, the solid dehydration and purging device and the gas conveying system for providing positive pressure. The compressed air pipe is connected. In this technical solution, the solid desorption and blow-off device is enclosed by a sealing baffle and the inner wall of the upper cylinder to form a cavity to isolate the negative pressure of the upper cylinder, and the sealed solid desorption and blow-off device provides positive pressure to the first opening structure through a gas pressure pipe. The first opening structure adopts a soft material to form a certain degree of sealing between the solid desorption and blow-off device and the outer wall of the rolling inner cylinder filter screen, without causing scratches and damage to the outer wall of the filter screen.

Preferably, a second opening structure opposite to the first opening structure is provided on the end of the desorbed solid collecting device close to the filter screen, and the second opening structure is communicated with the conveying device through the desorbing solid collecting device. Collect the trachea. In this technical scheme, the second opening structure arranged opposite to the first opening structure is butted with the first opening structure, which can efficiently inhale and collect the solids blown off by the gas from the screen, and the blown solids are transported through the collecting gas pipe.

Preferably, the rolling inner cylinder is provided with a purging device air inlet pipe connected to the solid dehydration and purging device, and the head of the solid dehydration and purging device is not less than the length of the rolling inner cylinder filter screen and is parallel to the rolling inner cylinder roller. The air-jet slits close to the inner wall of the rolling inner cylinder have a downward direction of jetting which is opposite to the rolling direction of the rolling inner cylinder and is nearly tangent to or at a small angle to the inner wall of the rolling inner cylinder. In this technical solution, the solid dehydration and purging device can maintain close-range air blowing to the filter screen when the rolling inner cylinder turns around, and the air-jet slit of the solid dehydration and purging device can carry out air blowing on the solids adsorbed on the filter screen by negative pressure. In the air blowing operation, the unabsorbed solid and liquid are blown away together, so that the adsorbed solid is dehydrated and dried, and the solid-liquid separation of the solid is realized.

Preferably, the gas delivery system is provided with a compressed air pipe, an air inlet pipe of the purging device, a collection air inlet pipe, a collection air outlet pipe and an outer cylinder air extraction pipe. In the technical solution, the air pipe provided in the gas conveying system connects the external air source with the drum filter system, and provides the required suction and air extraction functions for the operation of the drum filter system.

Preferably, both ends of the rolling inner cylinder are provided with open tubular structures, the collecting air intake pipe is connected to one end of the collecting gas pipe in the rolling inner cylinder via the tubular structure, and the other end of the collecting gas pipe is connected to the collecting air pipe. The air pipes are connected, and the air inlet pipe of the purging device is connected into the rolling inner cylinder through the tubular structure. In this technical solution, the collection air inlet pipe is a flow-restricted open air pipe, the collection air outlet pipe is connected to an external gas-solid separation device, and the flow restriction of the collection air inlet pipe and the air extraction of the collection air outlet pipe make all the There is a certain negative pressure in the collection trachea, and the negative pressure in the collection trachea will suck all the solids blown off by the desorbed solid collection device from the filter screen into the collection trachea, and the collection trachea will transport the collected solids through the collection outlet pipe. Go to the external gas-solid separation equipment for solid collection, the suction pipe mouth of the desorption solid collection device is provided with a throttle valve for adjusting the gas volume, and the throttle valve installed at the suction pipe mouth of the desorption solid collection device can adjust the intake air volume, In order to meet the air blowing requirements of the system under different workloads, the air inlet pipe of the purging device is connected to the external air supply device, and the air inlet pipe of the purging device provides positive pressure airflow for the solid dehydration purging device by connecting the external air supply device.

Preferably, the air extraction pipe of the outer cylinder is arranged in communication with the upper cylinder and is not communicated with the solid desorption and stripping device, and the part where the upper cylinder communicates with the solid desorption and stripping device is provided with a gas pressure pipe, and the pressure gas pipe is connected with the external air supply device. connect. In this technical solution, the outer cylinder air suction pipe can form a negative pressure between the outer cylinder and the rolling inner cylinder by pumping air from the outer cylinder, so that the solids are adsorbed on the filter screen, and the water in the raw liquid can enter the outer cylinder through the filter screen to obtain a filter. The clear liquid realizes the solid-liquid separation of the raw liquid. The compressed air pipe connected with the external air supply device provides pressure gas for the solid desorption and stripping device, so that the solid desorption and stripping device can perform positive pressure air blowing operation through the first opening structure.

Preferably, the liquid conveying system includes a raw water inlet pipe, a clean water outlet pipe and a sewage discharge pipe, the raw water inlet pipe passes into the rolling inner cylinder through the tubular structure, and the fresh water outlet pipe is communicated and arranged in the outer cylinder Above the position lower than the tubular structure, the sewage pipe is communicated and arranged at the bottom of the outer cylinder. In this technical solution, the raw liquid is sent into the rolling inner cylinder through the raw water inlet pipe, the solid-free filtrate filtered from the filter screen is discharged from the outer cylinder through the clean water outlet pipe, and the waste water generated by cleaning the outer cylinder is disposed outside the cylinder. The drain pipe at the bottom of the cylinder is emptied.

Preferably, a waterproof sealing ring is provided at the connection part of the rolling inner cylinder and the outer cylinder on the tubular structure, and two ends of the tubular structure are respectively provided with pulleys that are connected to the power equipment and driven synchronously. The tubular structure is rolled and supported on at least two rollers, and the rollers are fixed on the roller bracket. In this technical solution, the waterproof sealing ring on the tubular structure can maintain the air-tightness of the space between the inner and outer cylinders, so that the negative pressure can be maintained, and the synchronously driven pulley can simultaneously drive the rolling inner cylinder to rotate through the tubular structures at both ends, and avoid The inner cylinder filter is subjected to torque, which improves the stability of the rolling inner cylinder during rotation.

Preferably, a liquid level sensor is provided in the rolling inner cylinder, and the liquid level sensor is used to control the liquid level height in the rolling inner cylinder. In this technical solution, the liquid level sensor arranged in the rolling inner cylinder can reflect the liquid level height in the rolling inner cylinder, control the raw water inlet valve to adjust the liquid level, maintain the liquid level in the rolling inner cylinder at the required height, and avoid the liquid level in the rolling inner cylinder. If the liquid level is too high, the raw liquid will overflow, causing equipment damage and safety accidents, or if the liquid level is too low, the filtration efficiency will be affected.

Compared with the prior art, the beneficial effects are as follows: the present invention uses a fixedly arranged outer cylinder and a rolling inner cylinder that rotates circumferentially relative to the outer cylinder to filter the raw liquid by arranging a drum filtration system communicated with the gas conveying system and the liquid conveying system. Separation, solid-liquid separation is carried out on the solid-liquid separation on the rolling inner cylinder filter screen by the negative pressure of the outer cylinder, and then the solid is collected by blowing air, and the filter screen is kept in the best state, and the solid filtration is efficiently realized. The device has good practical effect and high filtration efficiency, and is especially suitable for solving difficult problems like algae that can hardly be filtered by the existing filtration technology.

Description of drawings

Fig. 1 is the structural representation of a kind of suction-blow filter system of the present invention;

Fig. 2 is the sectional view of the suction-blow filter system of the present invention;

Fig. 3 is the structural representation of the roller system of the suction-blow filter system of the present invention;

Fig. 4 is a cross-sectional view of the solid desorption and stripping device of the suction-blowing filter system of the present invention.

Description of reference numerals: 1-base, 2-roller, 3-pipe support, 4-outer cylinder, 41-upper cylinder, 42-lower cylinder, 5-rolling inner cylinder, 6-tubular structure, 7-roller bracket, 8 —Pulley, 9—Inlet pipe for raw water, 10—Outlet pipe for clean water, 11—Sewage pipe, 12—Exhaust pipe for outer cylinder, 13—Gas pressure pipe, 14—Solid desorption and stripping device, 141—First opening structure, 15— Sealing baffle, 16-desorbed solid collection device, 161-second opening structure, 17-collection gas pipe, 18-collection air inlet pipe, 19-collection gas outlet pipe, 20-solid dehydration purging device, 201-air jet slit, 21—Intake pipe of the purging device, 22—Sealing ring.

Detailed ways

The accompanying drawings are for illustrative purposes only, and should not be construed as limitations on this patent; in order to better illustrate the present embodiment, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art It is understandable to the artisan that certain well-known structures and descriptions thereof may be omitted from the drawings. The positional relationships described in the drawings are only for exemplary illustration, and should not be construed as a limitation on the present patent.

The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms “upper”, “lower”, “left” and “right” The orientation or positional relationship indicated by "long" and "short" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific Therefore, the terms describing the positional relationship in the accompanying drawings are only used for exemplary illustration, and should not be construed as a limitation on this patent. For those of ordinary skill in the art, they can understand according to specific circumstances. The specific meanings of the above terms.

Below by specific embodiment, and in conjunction with accompanying drawing, the technical scheme of the present invention is further described in detail:

Example 1

As shown in Figures 1 to 4, a suction-blow filtration system includes a drum filtration system for solid-liquid separation, a gas conveying system, and a liquid conveying system for conveying raw liquid and discharging filtrate for the drum filtration system. The drum The filter system includes an outer cylinder 4 that is sleeved and fixed on the base 1 and a rolling inner cylinder 5 whose cylinder wall is a filter screen. The solid outer cylinder suction pipe 12 and the rolling inner cylinder 5 can be rolled circumferentially. The drum filter system also includes a solid dehydration and purge device 20, a solid desorption and stripping device 14, and a desorption solid collection device 16.

In this embodiment, a suction-blow filtration system is provided with a drum filtration system that communicates with the gas conveying system and the liquid conveying system. The raw liquid is introduced into the rolling inner cylinder 5, and the outer cylinder 4 is pumped through the gas delivery system and the air suction pipe 12 to form a negative pressure environment. The filtrate is sucked into the gap between the inner and outer cylinders by the negative pressure between the inner and outer cylinders, while the solids thicker than the filter holes are intercepted by the filter screen, block the filter holes, and rotate with the drum; The sucked solids flow down with the water and continue to wait for the opportunity to be sucked up by the filter holes. When the water and solids that have not flowed cleanly from the surface layer roll to the solid dehydration and purging device 20, they are swept away by strong gas and flow back to the lower water body, and only the innermost solids that are sucked by negative pressure can pass through the purging valve. Continue up. When the solids adsorbed on the inner wall of the drum rotate with the filter screen to the position of the desorption solids collection device 16, not only does the negative pressure suddenly disappear, but also receives a strong pressure air flow from the solid desorption stripping device 14 outside the inner drum, The inner wall of the rolling inner cylinder 5 is blown off and directly falls into the desorption solid collection device 16 inside the inner cylinder of the drum. The desorption solid collection device 16 has a certain negative pressure, which can effectively improve the desorption solid collection device 16. Solid collection effect.

The outer cylinder 4 includes an upper cylinder 41 and a lower cylinder 42 that are sealed and connected, and the solid desorption and blow-off device 14 is arranged on the inner wall of the outer cylinder 4, including a cavity structure isolated from the negative pressure of the upper cylinder 41, and a space between the sealing baffles 15 The longitudinally extending first opening structure 141, the cavity structure is enclosed by the sealing baffle 15 and the inner wall of the upper cylinder 41 to form a cavity, and the cavity structure is communicated with the pressure gas pipe 13 for providing positive pressure in the gas delivery system. In this embodiment, the solid desorption and stripping device 14 is enclosed by the sealing baffle 15 and the inner wall of the upper cylinder 41 to form a cavity to isolate the negative pressure of the upper cylinder 41. The opening structure 141 provides positive pressure, and the first opening structure 141 adopts a soft material to form a certain degree of sealing between the solid desorption blow-off device 14 and the outer wall of the filter screen of the rolling inner cylinder 5, without causing scratches and damage to the outer wall of the filter screen. .

In addition, a second opening structure 161 opposite to the first opening structure 141 is provided on the end of the desorbed solid collecting device 16 close to the filter screen, and the second opening structure 161 is communicated with the collecting gas pipe for transportation through the desorbing solid collecting device 16 17. In this embodiment, the second opening structure 161 disposed opposite to the first opening structure 141 is docked with the first opening structure 141, which can efficiently inhale and collect the solids blown off by the gas from the filter screen, and the blown solids pass through the collecting gas pipe 17 for shipping.

Wherein, the rolling inner cylinder 5 is provided with a purging device intake pipe 21 connected to the solid dehydration and purging device 20, and the head of the solid dehydration and purging device 20 is not less than the length of the filter screen of the rolling inner cylinder 5 and is parallel to the rolling axis of the rolling inner cylinder 5. The jetting slit 201 close to the inner wall of the rolling inner cylinder 5, its jetting direction is opposite to the rolling direction of the rolling inner cylinder 5 and is close to the inner wall of the rolling inner cylinder 5 or close to a small angle. In this embodiment, the solid dehydration and purging device 20 can maintain close-range air blowing to the filter screen when the rolling inner cylinder 5 turns around. The solids are blown away, and the unabsorbed solids and liquids are blown away together, so that the adsorbed solids are dehydrated and dried, and the solid-liquid separation of the solids is realized.

In addition, the gas delivery system is provided with a compressed air pipe 13 , an air inlet pipe 21 of the purging device, a collection air inlet pipe 18 , a collection air outlet pipe 19 and an outer cylinder air extraction pipe 12 . In this embodiment, the air pipe provided in the gas delivery system connects the external air source with the drum filter system, so as to provide the required suction and air extraction functions for the operation of the drum filter system.

The two ends of the rolling inner cylinder 5 are provided with open tubular structures 6 , the collecting air intake pipe 18 is connected with one end of the collecting gas pipe 17 in the rolling inner cylinder 5 through the tubular structure 6 , and the other end of the collecting gas pipe 17 is connected with the collecting gas outlet pipe 19 In connection, the air inlet pipe 21 of the purging device is inserted into the rolling inner cylinder 5 via the tubular structure 6 . In this embodiment, the collecting air intake pipe 18 is a flow-restricted open air pipe, and the collecting air pipe 19 is connected to the external gas-solid separation equipment. A certain negative pressure, the negative pressure in the collection air pipe 17 will suck all the solids blown off the desorbed solids collection device 16 from the filter screen into the collection air pipe 17, and the collection air pipe 17 will collect the collected solids through the collection air pipe 19. Transport to the outside air. The solid separation equipment collects solids, and the suction pipe port of the desorption solid collection device 16 is provided with a throttle valve for adjusting the air volume. For air blowing requirements under different workloads, the air inlet pipe 21 of the purging device is connected to the external air supply device, and the air inlet pipe 21 of the purging device provides positive pressure airflow for the solid dehydration and purging device 20 by connecting the external air supply device.

In addition, the outer cylinder air extraction pipe 12 is communicated with the upper cylinder 41 and is not communicated with the solid desorption and stripping device 14. The position where the upper cylinder 41 communicates with the solid desorption and stripping device 14 is provided with a compressed air pipe 13, and the compressed air pipe 13 is connected to the outside Air supply connection. In this embodiment, the outer cylinder air suction pipe 12 can form a negative pressure between the outer cylinder 4 and the rolling inner cylinder 5 by pumping the outer cylinder 4, so that the solids are adsorbed on the filter screen, and the water in the raw liquid can enter the external cylinder through the filter screen. In the cylinder 4, the filtrate is obtained, and the solid-liquid separation of the raw liquid is realized, and the pressure gas pipe 13 connected with the external air supply device provides pressure gas for the solid desorption and stripping device 14, so that the solid desorption and stripping device 14 can pass through the first. The opening structure 141 implements a positive pressure blowing operation.

The liquid conveying system includes a raw water inlet pipe 9, a clean water outlet pipe 10 and a sewage discharge pipe 11. The raw water inlet pipe 9 passes into the rolling inner cylinder 5 through the tubular structure 6, and the fresh water outlet pipe 10 is communicated and arranged on the outer cylinder 4 and is lower than the tubular shape. At the position of the structure 6 , the sewage pipe 11 is communicated and arranged at the bottom of the outer cylinder 4 . In this embodiment, the raw liquid is fed into the rolling inner cylinder 5 through the raw water inlet pipe 9, and the solid-free filtrate filtered from the filter screen is discharged from the outer cylinder 4 through the clean water outlet pipe 10, and the waste generated by cleaning the outer cylinder, etc. The waste water is evacuated through the sewage pipe 11 arranged at the bottom of the outer cylinder 4 .

In addition, a waterproof sealing ring 22 is provided at the connection part of the rolling inner cylinder 5 and the outer cylinder 4 on the tubular structure 6, and the two ends of the tubular structure 6 are respectively provided with pulleys 8 that are connected to the power equipment and driven synchronously. The rolling support is supported on at least two rollers 2 , and the rollers 2 are fixed on the roller bracket 7 . In this embodiment, the waterproof sealing ring 22 on the tubular structure 6 can maintain the air-tightness of the space between the inner and outer cylinders 4, so as to keep the negative pressure, and the synchronously driven pulley 8 can simultaneously drive the rolling inner cylinder through the tubular structure 6 at both ends. The cylinder 5 is rotated, and the inner cylinder filter screen is prevented from being torqued, and the stability of the rolling inner cylinder 5 during rotation is improved.

Wherein, the rolling inner cylinder 5 is provided with a liquid level sensor, and the liquid level sensor is used to control the liquid level height in the rolling inner cylinder 5 . In this embodiment, the liquid level sensor arranged in the rolling inner cylinder 5 can reflect the liquid level height in the rolling inner cylinder 5, control the raw water inlet valve to adjust the liquid level, and maintain the liquid level in the rolling inner cylinder 5 at the required level. The height of the liquid level is too high to avoid the overflow of the original liquid, or the liquid level is too low to affect the filtration efficiency.

Obviously, the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limiting the embodiments of the present invention. For those of ordinary skill in the art, changes or modifications in other different forms can also be made on the basis of the above description. There is no need and cannot be exhaustive of all implementations here. Any modifications, equivalent replacements and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

A suction-blow filtration system, characterized in that it includes a drum filtration system for solid-liquid separation, a gas conveying system, and a liquid conveying system for conveying raw liquid and discharging filtrate for the drum filtration system, the drum filtration system comprising: The outer cylinder (4) fixed on the base (1) and the rolling inner cylinder (5) whose cylinder wall is a filter screen are sleeved together, and a closed space is formed between the outer cylinder (4) and the rolling inner cylinder (5). There is an outer cylinder suction pipe (12) for forming a negative pressure suction solid body, the rolling inner cylinder (5) can be rolled in a circumferential direction, and the drum filter system also includes a solid dehydration and purging device (20) and a solid dewatering device. A stripping device (14) is attached, and a desorbing solids collection device (16) is attached.
The suction-blow filter system according to claim 1, characterized in that: the outer cylinder (4) comprises an upper cylinder (41) and a lower cylinder (42) which are sealedly connected, and the solid desorption and stripping device (14) It is arranged on the inner wall of the outer cylinder (4) and includes a cavity structure isolated from the negative pressure of the upper cylinder (41), and a first opening structure (141) extending longitudinally between the sealing baffles (15). The structure is enclosed by a sealing baffle (15) and the inner wall of the upper cylinder (41) to form a cavity, and the cavity structure is communicated with a compressed gas pipe (13) used for providing positive pressure in the gas delivery system.
The suction-blow filtration system according to claim 2, wherein a second opening structure opposite to the first opening structure (141) is provided on the end of the desorbed solid collecting device (16) close to the filter screen (161), the second opening structure (161) is communicated with the collecting gas pipe (17) for conveying through the desorption solid collecting device (16).
The suction-blow filter system according to claim 3, characterized in that: the rolling inner cylinder (5) is provided with a purge device air inlet pipe (21) connected to the solid dehydration purge device (20), and the solid dehydration purge device The head of the sweeping device (20) is an air jet slit (201) whose length is not less than that of the rolling inner cylinder (5) and the length of the filter screen is parallel to the rolling shaft of the rolling inner cylinder (5) and is close to the inner wall of the rolling inner cylinder (5). The downward direction is opposite to the rolling direction of the rolling inner cylinder (5) and is approximately tangent to or at a small angle to the inner wall of the rolling inner cylinder (5).
The suction-blow filter system according to claim 1, characterized in that: the gas delivery system is provided with a compressed air pipe (13), an air inlet pipe (21) of a purging device, a collection air inlet pipe (18), and a collection air outlet pipe (19). ) and the outer cylinder exhaust pipe (12).
The suction-blow filter system according to claim 5, characterized in that: both ends of the rolling inner cylinder (5) are provided with open tubular structures (6), and the collection air intake pipe (18) passes through the tubular structure (6) It is connected with one end of the collecting air pipe (17) in the rolling inner cylinder (5), the other end of the collecting air pipe (17) is connected with the collecting air pipe (19), and the air inlet pipe ( 21) Access to the rolling inner cylinder (5) via the tubular structure (6).
The suction-blow filter system according to claim 5, characterized in that: the outer cylinder air suction pipe (12) is communicated with the upper cylinder (41) and is not communicated with the solid desorption and blow-off device (14), and the upper cylinder ( 41) A compressed air pipe (13) is provided at the part communicating with the solid desorption and stripping device (14), and the compressed air pipe (13) is connected to an external air supply device.
The suction-blow filter system according to claim 1, characterized in that: the liquid conveying system comprises a raw water inlet pipe (9), a clean water outlet pipe (10) and a sewage pipe (11), and the raw water inlet pipe (9) The tubular structure (6) is connected to the rolling inner cylinder (5), and the fresh water outlet pipe (10) is communicated and arranged on the outer cylinder (4) at a position lower than the tubular structure (6), so The sewage pipe (11) is communicated and arranged at the bottom of the outer cylinder (4).
The suction-blow filter system according to claim 1, characterized in that: a waterproof sealing ring (22) is provided at the connection part of the rolling inner cylinder (5) and the outer cylinder (4) on the tubular structure (6). ), both ends of the tubular structure (6) are respectively provided with synchronously driven pulleys (8) connected with the power equipment, and the tubular structure (6) at each end is rolled and supported on at least two rollers (2) , the roller (2) is fixed on the roller bracket (7).
The suction-blow filtration system according to claim 1, characterized in that: the rolling inner cylinder (5) is provided with a liquid level sensor, and the liquid level sensor is used to control the liquid level height in the rolling inner cylinder (5).