Elastic filtering device

Abstract

The present invention relates to the field of filtration technology, and discloses an elastic filtration device, comprising: a cylinder body, an elastic filtration unit, a ranging unit and a backwashing unit; the cylinder body is provided with a receiving cavity; the ranging unit, the ranging unit includes a distance sensor, a ranging steel plate and a pressure sensor; the ranging steel plate is arranged on the movable perforated steel plate, and the distance sensor is used to sense the distance between the ranging steel plate and the distance sensor; when the distance measured by the first distance sensor and the ranging steel plate is less than a first preset value or the pressure of the pressure sensor is higher than a second preset value, the elastic filtration unit is backwashed until the distance between the two is greater than the second preset value. Compared with the existing elastic filtration equipment, in the present invention, the elastic filter media is pressed by the device during the filtration state, improving the pollutant filtration efficiency. When backwashing, the elastic filter media pressing plate is released, which is conducive to thorough backwashing. The whole process is automatically and synergistically controlled by hydrodynamic force and spring elasticity.

Description

Technical Field

[0001] The present invention relates to the technical field of filtration, and particularly to an elastic filtration device. Background Art

[0002] At present, a variety of elastic media have been used in water treatment process equipment, especially rapid filters. The characteristics of rapid filters are high filtration velocity (5 - 50m 3 / h), small equipment volume, and good interception and removal effects on particulate matter.

[0003] Although there are many types of fiber filters, however, most of the actual application filters generally have problems such as poor filtration material interception ability, poor backwashing effect, unstable operation, and poor equipment durability. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: poor filtration material interception ability, poor backwashing effect, unstable operation, and poor equipment durability of the filter.

[0005] To solve the above technical problems, the present invention provides an elastic filtration device, including:

[0006] A cylinder body, which is provided with a receiving cavity;

[0007] An elastic filtration unit, which is arranged in the receiving cavity. The elastic filtration unit includes an elastic filter material, a movable perforated steel plate, a spring, and a fixed perforated steel plate. The movable perforated steel plate and the fixed perforated steel plate are connected by a spring, and the elastic filter material is arranged between the movable perforated steel plate and the fixed perforated steel plate. The movable perforated steel plate is movably arranged in the receiving cavity, and the fixed perforated steel plate is fixed in the receiving cavity;

[0008] A backwashing unit, which is electrically connected to the distance sensor and is used for cleaning the elastic filter material;

[0009] A ranging unit, which includes a distance sensor, a ranging steel plate, and a pressure sensor. The distance sensor is arranged at the top of the receiving cavity, the ranging steel plate is arranged on the movable perforated steel plate, and the distance sensor is used to sense the distance between the ranging steel plate and the distance sensor; the pressure sensor is arranged on the movable perforated steel plate, and the pressure sensor is used to sense the pressure between the movable perforated steel plate and the elastic filter material;

[0010] Wherein, when the distance between the distance sensor and the ranging steel plate is less than a first preset value or the pressure of the pressure sensor is higher than a second preset value, the backwashing unit backwashes the elastic filter material

[0011] In the above technical solution, the elastic filtering unit includes a drawstring, and the drawstring connects the cylinder body and the movable perforated steel plate in the accommodating cavity, so that the movable perforated steel plate is suspended in the accommodating cavity.

[0012] In the above technical solution, the accommodating cavity is provided with a limiting portion, and the limiting portion is located above the movable perforated steel plate.

[0013] In the above technical solution, the backwashing unit includes a control module, a backwashing water inlet valve, a backwashing air blower, and a backwashing water pump. The control module is electrically connected to the sensor. Both the backwashing water pump and the backwashing air blower are communicated with the backwashing water inlet valve, and the backwashing water inlet valve is communicated with the accommodating cavity.

[0014] In the above technical solution, the backwashing unit includes an annular water distributor, and the annular water distributor is arranged in the accommodating cavity.

[0015] In the above technical solution, it further includes a water inlet unit, and the water inlet unit is communicated with the accommodating cavity.

[0016] In the above technical solution, the water inlet unit includes a lifting water pump and a sewage water inlet valve, and the lifting water pump, the sewage water inlet valve, and the accommodating cavity are communicated in sequence.

[0017] In the above technical solution, it further includes a backwashing water outlet valve, and the backwashing water outlet valve is communicated with the accommodating cavity.

[0018] In the above technical solution, it further includes a purified water outlet valve, and the purified water outlet valve is communicated with the accommodating cavity.

[0019] In the above technical solution, it further includes: a controller; the controller is electrically connected to the distance sensor and the pressure sensor respectively; when the distance between the distance sensor and the ranging steel plate is less than a first preset value and the pressure of the pressure sensor is lower than a second preset value, or when the distance between the distance sensor and the ranging steel plate is greater than the first preset value and the pressure of the pressure sensor is higher than the second preset value, the controller generates and sends out a device failure signal.

[0020] Compared with the prior art, the elastic filtering device of the embodiment of the present invention has the beneficial effects that: fully considering the state changes of the elastic filtering unit under different operating states, detecting the expansion degree of the elastic filtering unit through the ranging unit, and using it to control the start and stop of the device backwashing program, reducing energy consumption while reducing the burden on the device structure pressure bearing.

[0021] Compared with the existing elastic filtering equipment, in the filtering state of the present invention, the elastic filter media is pressed by the device, improving the pollutant filtering efficiency. When backwashing, the elastic filter media pressing plate is loosened, which is conducive to thorough backwashing. The whole process is fully automatically controlled by hydrodynamic force and spring elasticity in coordination. Brief Description of the Drawings

[0022] Figure 1 is a schematic structural view of the elastic filtering device according to an embodiment of the present invention;

[0023] In the figure, 1 is a cylinder body; 100 is a receiving cavity; 11 is a limiting portion; 21 is an elastic filter medium; 22 is a movable perforated steel plate; 23 is a spring; 24 is a fixed perforated steel plate; 25 is a pull rope; 26 is a distance measuring steel plate; 31 is a distance sensor; 32 is a pressure sensor; 41 is a backwashing water inlet valve; 42 is a backwashing fan; 43 is a backwashing water pump; 44 is an annular water distributor; 51 is a lifting water pump; 52 is a sewage inlet valve; 61 is a backwashing water outlet valve; 62 is a purified water outlet valve. Detailed Embodiment

[0024] The following further describes in detail the specific embodiments of the present invention in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0025] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. in the present invention 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 device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0026] In the description of the present invention, it should be understood that the terms "connected", "connected", "fixed", etc. used in the present invention should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral body; it can be a mechanical connection, a welded connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0027] If the first and second are described only for the purpose of distinguishing technical features, it should not be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0028] As Figure 1 shown, a preferred embodiment of an elastic filtering device according to an embodiment of the present invention includes:

[0029] A cylinder body 1, and the cylinder body 1 is provided with a receiving cavity 100;

[0030] Elastic filtration unit, the elastic filtration unit is arranged in the accommodation cavity 100. The elastic filtration unit includes an elastic filter medium 21, a movable perforated steel plate 22, a spring 23 and a fixed perforated steel plate 24. The movable perforated steel plate 22 and the fixed perforated steel plate 24 are connected by the spring 23. The elastic filter medium 21 is arranged between the movable perforated steel plate 22 and the fixed perforated steel plate 24. The movable perforated steel plate 22 is movably arranged in the accommodation cavity 100, and the fixed perforated steel plate 24 is fixed to the accommodation cavity 100;

[0031] Backwashing unit, the backwashing unit is electrically connected to the distance sensor, and the backwashing unit is used to clean the elastic filter medium 21;

[0032] Distance measuring unit, the distance measuring unit includes a distance sensor, a distance measuring steel plate 26 and a pressure sensor 32. The distance sensor is arranged at the top of the accommodation cavity 100. The distance measuring steel plate 26 is arranged on the movable perforated steel plate 22. The distance sensor is used to sense the distance between the distance measuring steel plate 26 and the distance sensor; The pressure sensor 32 is arranged on the movable perforated steel plate 22, and the pressure sensor 32 is used to sense the pressure between the movable perforated steel plate 22 and the elastic filter medium 21;

[0033] Wherein, when the distance between the distance sensor and the distance measuring steel plate 26 is less than a first preset value or the pressure of the pressure sensor 32 is higher than a second preset value, the backwashing unit backwashes the elastic filter medium 21. When the elastic filter medium 21 is in the filtering state, the elastic filter medium 21 is pressed by the movable perforated steel plate. When the elastic filter medium is in the backwashing state, the movable perforated steel plate 22 is loosened.

[0034] It can be understood that, fully considering the state changes of the elastic filtration unit in different operating states, the expansion degree of the elastic filtration unit is detected by the distance measuring unit and used to control the start and stop of the equipment backwashing program, reducing energy consumption and at the same time reducing the burden on the equipment structure pressure bearing.

[0035] Compared with the existing elastic filtration equipment, the present invention can automatically control the backwashing time and frequency according to the adsorption and release conditions of the filtration filler to pollutants, saving a large amount of energy while ensuring the backwashing effect.

[0036] This embodiment fully considers the physical parameter changes of the high-efficiency elastic filtration device under different operating states (filtration / backwashing), and innovatively applies the spring 23 to assist in adjusting the filter material density. Different from the previous method of adjusting the height of the filter material layer by driving rigid mechanical components (such as lead screws, etc.) with motors and oil cylinders, it reduces energy consumption while reducing the pressure-bearing burden on the equipment structure. By using the relationship between the pollutant accumulation amount of the elastic filter material 21 and the stretching degree of the spring 23, the ranging unit detects the stretching degree of the spring 23 and is used to control the start and stop of the backwashing program of the backwashing unit. Compared with the existing elastic filtration equipment, the present invention can automatically control the backwashing time and frequency according to the adsorption and release conditions of the elastic filter material 21 to pollutants, saving a large amount of energy while ensuring the backwashing effect.

[0037] Preferably, the elastic filler for filtration can be selected accordingly according to the amount and characteristics of the wastewater to be treated. For example, in the case of large-flow inlet water, large pollutant interception amount, and frequent backwashing, an elastic medium material with high strength, good elasticity, and small permanent deformation (such as styrene-based elastomer (SBC)) is selected; for wastewater with corrosiveness and oxidability (such as industrial wastewater), an elastic medium material with excellent corrosion resistance and oxidation resistance (olefin-based thermoplastic elastomer (TOPs)) is selected as the filler. The treatment capacity of this high-efficiency elastic medium filtration equipment can reach 1000m 3 / d-m 2 or more, and it has stable operation, high automation degree, and low operation energy consumption, and has great advantages compared with similar high-speed filtration equipment.

[0038] Furthermore, as Figure 1 shown, the elastic filtration unit includes a pull rope 25. The pull rope 25 connects the cylinder body 1 and the movable perforated steel plate 22 in the accommodation cavity 100, so that the movable perforated steel plate 22 is suspended in the accommodation cavity 100.

[0039] It can be understood that the pull rope 25 suspends the movable perforated steel plate 22 in the accommodation cavity 100. When the elastic filter material 21 adsorbs pollutants, it can expand, driving the ranging steel plate 26 on the movable perforated steel plate 22 closer to the distance sensor, which is beneficial for the backwashing unit to detect the expansion degree of the elastic filter material 21, and then judge the necessity of backwashing the elastic filter material 21.

[0040] Furthermore, as Figure 1 shown, the accommodation cavity 100 is provided with a limiting part 11, and the limiting part 11 is located above the movable perforated steel plate 22.

[0041] It can be understood that the limiting part 11 can prevent the movable perforated steel plate 22 from being pushed due to the expansion of the elastic filter material 21, so that the distance sensor collides with the movable perforated steel plate 22 and is damaged.

[0042] Furthermore, as Figure 1As shown, the backwash unit includes a control module, a backwash water inlet valve 41, a backwash fan 42 and a backwash water pump 43. The control module is electrically connected to the sensor. The backwash water pump 43 and the backwash fan 42 are both connected to the backwash water inlet valve 41, and the backwash water inlet valve 41 is connected to the accommodating chamber 100.

[0043] It is understood that the backwash fan 42 and backwash water pump 43 can perform a combined air-water backwash, allowing the expanded elastic filter media 21 to be backwashed under the action of the backwash fan 42 and backwash water pump 43, thereby reducing energy consumption and alleviating the pressure burden on the equipment structure. The backwash water inlet valve 41 can close the connection between the backwash water pump 43 and the accommodating chamber 100 when the elastic filter unit is in the filtering state, thereby facilitating the elastic filter unit to filter wastewater.

[0044] Further, if Figure 1 As shown, the backwash unit includes an annular water distributor 44 , which is disposed in the accommodating chamber 100 .

[0045] It is understandable that the annular water distributor 44 can increase the backwash area of the elastic filter unit by the backwash unit, which is conducive to the elastic filter unit that has expanded due to adsorption of pollutants to remove pollutants under the backwash of the annular water distributor 44.

[0046] Further, if Figure 1 As shown, it also includes a water inlet unit, which is connected to the accommodating chamber 100. Through the water inlet unit, the present invention can pass sewage into the accommodating chamber 100, which is beneficial for the elastic filter unit to filter the sewage.

[0047] Preferably, the water inlet unit includes a lifting water pump 51 and a sewage inlet valve 52, and the lifting water pump 51, the sewage inlet valve 52 and the accommodating chamber 100 are connected in sequence.

[0048] Further, if Figure 1 As shown, the backwash outlet valve 61 is further included, and the backwash outlet valve 61 is connected to the accommodating chamber 100. The backwash outlet valve 61 can discharge the sewage obtained after backwashing, and can also close the connection between the backwash water pump 43 and the accommodating chamber 100 when the elastic filter unit is in the filtering state, which is beneficial for the elastic filter unit to filter the sewage.

[0049] Further, if Figure 1 As shown, it also includes a clean water outlet valve, which is connected to the accommodating chamber 100. The clean water outlet valve can discharge the clean water on the one hand, and on the other hand, it can close the connection between the clean water pump and the accommodating chamber 100 when the elastic filter unit is backwashing, which is beneficial for the backwash unit to backwash the elastic filter unit.

[0050] Preferably, if Figure 1 As shown, it also includes a motor, which is connected to the pull rope 25 in a transmission manner.

[0051] The working process of the present invention is as follows:

[0052] When in the filtering mode, the sewage inlet valve 52 and the purified water outlet valve are opened, and other valves are closed. Sewage enters the accommodation cavity 100 from the sewage inlet valve 52. The spring 23 is in a slightly stretched state. The sewage passes through the elastic filter material 21 from bottom to top, and most of the organic matters and some dissolved pollutants are intercepted. The filtered purified water is discharged from the purified water outlet valve. As the pollutants intercepted by the filter layer accumulate continuously, the thickness of the elastic filter material 21 and the stretching degree of the spring 23 increase accordingly. When the filter layer increases to a certain thickness, the distance sensor measures that the distance between the distance sensor 31 and the ranging steel plate 26 is less than the first preset value, and the device starts the backwashing program.

[0053] When the device is in the backwashing mode, the sewage inlet valve 52 and the purified water outlet valve are in the closed state. The motor is started to tighten the pull rope 25 to raise the height of the movable perforated steel plate to reduce the density of the filter material layer. The backwash inlet valve 41 and the backwash outlet valve 61 are opened, and then the backwash water pump 43 and the backwash fan 42 are started for backwashing. When the height of the movable perforated steel plate drops and the distance sensor measures that the distance between the distance sensor and the ranging steel plate 26 is stable at the second preset value for a period of time, it indicates that the backwashing is completed. At this time, the motor is started again to loosen the pull rope 25 to reset the movable perforated steel plate, and the backwash inlet valve 41 and the backwash outlet valve 61 are closed. Then the device enters the filtering state again.

[0054] Furthermore, the present application further includes: a controller. The controller is electrically connected to the distance sensor 31 and the pressure sensor 32 respectively. When the distance between the distance sensor 31 and the ranging steel plate 26 is less than the first preset value and the pressure of the pressure sensor 32 is lower than the second preset value, or the distance between the distance sensor 31 and the ranging steel plate 26 is greater than the first preset value and the pressure of the pressure sensor 32 is higher than the second preset value, the controller generates and sends out a device failure signal. Among them, the situation that the distance between the distance sensor 31 and the ranging steel plate 26 is less than the first preset value and the pressure of the pressure sensor 32 is lower than the second preset value represents that one of the distance sensor 31 or the pressure sensor 32 is damaged. The situation that the distance between the distance sensor 31 and the ranging steel plate 26 is greater than the first preset value and the pressure of the pressure sensor 32 is higher than the second preset value represents that one of the distance sensor 31 or the pressure sensor 32 is damaged. At this time, a device failure signal is sent out through the controller to wait for the staff to repair.

[0055] The present invention provides an elastic filtering device. Compared with the existing elastic filtering equipment, it can automatically control the backwashing time and frequency according to the adsorption and release conditions of pollutants by the filtering filler, saving a large amount of energy consumption while ensuring the backwashing effect. Secondly, in the filtering state, the elastic filter material 21 is pressed by the device in the present invention, improving the pollutant filtering efficiency. When backwashing, the pressing plate of the elastic filter material 21 is loosened, which is conducive to thorough backwashing. The whole process is automatically and synergistically controlled by hydrodynamic force and the elastic force of the spring 23.

[0056] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art of the present technology, without departing from the technical principle of the present invention, several improvements and substitutions can be made, and these improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. An elastic filtering device, characterized in that, Comprising: A cylinder body, which is provided with a receiving cavity; An elastic filter unit, which is arranged in the receiving cavity. The elastic filter unit includes an elastic filter material, a movable perforated steel plate, a spring, a fixed perforated steel plate and a pull rope. The pull rope connects the cylinder body and the movable perforated steel plate in the receiving cavity so that the movable perforated steel plate is suspended in the receiving cavity. The movable perforated steel plate and the fixed perforated steel plate are connected by a spring, and the elastic filter material is arranged between the movable perforated steel plate and the fixed perforated steel plate. The movable perforated steel plate is movably arranged in the receiving cavity, and the fixed perforated steel plate is fixed in the receiving cavity; A ranging unit, which includes a distance sensor, a ranging steel plate and a pressure sensor. The distance sensor is arranged at the top of the receiving cavity, the ranging steel plate is arranged on the movable perforated steel plate, and the distance sensor is used to sense the distance between the ranging steel plate and the distance sensor; the pressure sensor is arranged on the movable perforated steel plate, and the pressure sensor is used to sense the pressure between the movable perforated steel plate and the elastic filter material; A backwashing unit, which is electrically connected to the distance sensor and is used to wash the elastic filter material; A controller, which is electrically connected to the distance sensor and the pressure sensor respectively; Wherein, when the distance between the distance sensor and the ranging steel plate is less than a first preset value or the pressure of the pressure sensor is higher than a second preset value, the backwashing unit backwashes the elastic filter material; when the distance between the distance sensor and the ranging steel plate is less than the first preset value and the pressure of the pressure sensor is lower than the second preset value, or the distance between the distance sensor and the ranging steel plate is greater than the first preset value and the pressure of the pressure sensor is higher than the second preset value, the controller generates and sends out an equipment failure signal.

2. The elastic filtering device according to claim 1, wherein The receiving cavity is provided with a limiting part, which is located above the movable perforated steel plate.

3. The elastic filtering device according to claim 1, characterized in that, The backwashing unit includes a control module, a backwashing water inlet valve, a backwashing blower and a backwashing water pump. The control module is electrically connected to the distance sensor. The backwashing water pump and the backwashing blower are both communicated with the backwashing water inlet valve, and the backwashing water inlet valve is communicated with the receiving cavity.

4. The elastic filtering device according to claim 1, characterized in that The backwashing unit includes an annular water distributor, which is arranged in the receiving cavity.

5. The elastic filtering device according to claim 1, characterized in that, It further includes a water inlet unit, which is communicated with the receiving cavity.

6. The elastic filtering device according to claim 5, characterized in that, The water inlet unit includes a lifting water pump and a sewage inlet valve, and the lifting water pump, the sewage inlet valve and the receiving cavity are communicated in sequence.

7. The elastic filtering device according to claim 1, wherein, It further includes a backwashing water outlet valve, which is communicated with the receiving cavity.

8. The elastic filtering device according to claim 1, characterized in that, It further includes a purified water outlet valve, which is communicated with the receiving cavity.

Images