Filtering system and filtering equipment and cleaning method thereof

Abstract

The invention provides a filtering system and filtering equipment and a cleaning method thereof, and relates to the field of filtering device.The filtering equipment comprises a tank body and a filtering layer, the tank body is provided with a containing cavity, the tank body comprises a liquid inlet end and a liquid outlet end, the liquid inlet end is provided with an exhaust port, the liquid outlet end is connected with a filtrate channel and a cleaning medium channel, and the tank body is provided with a liquid outlet; the liquid outlet is located between the liquid inlet end and the liquid outlet end, the filter layer is arranged in the tank body and located at the end, away from the liquid inlet end, of the liquid outlet, the exhaust port has a first working state and a second working state, and when the exhaust port is in the first working state, the filtrate channel communicates with the containing cavity so that filtrate can be output through the filtrate channel; when the exhaust port is in the second working state, the cleaning medium channel is communicated with the containing cavity, so that the cleaning medium can be input into the containing cavity and clean the filtering layer, and the cleaning medium is discharged through the liquid discharging port. Suspended matters can be efficiently separated from the tank body, and the cleaning effect of the filtering layer is enhanced.

Description

Technical Field

[0001] The present application relates to the field of filtering equipment, and in particular to a filtering system and filtering equipment and a cleaning method thereof. Background Art

[0002] Filtration equipment is the main equipment for water treatment. It can efficiently remove impurities such as suspended matter, colloids, silt, clay, humus, particulate matter, etc. in water, reduce water turbidity, and achieve the purpose of water clarification.

[0003] The relevant filtering equipment has the problem of incomplete cleaning of the filter layer after completing the filtration, which affects the effect of the next round of filtration. Summary of the invention

[0004] In order to overcome the deficiencies in the prior art, the present application provides a filtration system and a filtration device and a cleaning method thereof.

[0005] In a first aspect, the present application provides a filtering device, comprising: a tank body and a filtering layer, the tank body having a accommodating cavity, the tank body comprising a liquid inlet end and a liquid outlet end, the liquid inlet end being provided with an exhaust port, the liquid outlet end connecting a filtrate channel and a cleaning medium channel, and the tank body being provided with a drain port, the drain port being located between the liquid inlet end and the liquid outlet end, the drain port having a preset height, the filtering layer being arranged in the tank body, and the filtering layer being located at an end of the drain port away from the liquid inlet end, the exhaust port having a first working state and a second working state, when the exhaust port is in the first working state, the filtrate channel is communicated with the accommodating cavity so that the filtrate is output through the filtrate channel, when the exhaust port is in the second working state, the liquid level in the accommodating cavity is at the preset height, and the cleaning medium channel is communicated with the accommodating cavity so that the cleaning medium can be input into the accommodating cavity and the filtering layer is cleaned, and the cleaning medium is discharged through the drain port.

[0006] In combination with the first aspect, in a possible embodiment, the filtering device also includes: a guide component, which is arranged on the tank body, and the guide component has a first cleaning medium channel, a second cleaning medium channel and a third cleaning medium channel, and the accommodating cavity can be connected to the first cleaning medium channel, the second cleaning medium channel, and the third cleaning medium channel in sequence.

[0007] In combination with the first aspect, in a possible embodiment, the guide assembly includes: a first guide member, a second guide member and a third guide member, the first guide member is connected to the liquid outlet, and the first guide member has a first cleaning medium channel, the second guide member is connected to the liquid outlet, and the second guide member has a second cleaning medium channel, the third guide member is arranged on the tank body, the third guide member is located between the exhaust port and the drain port, and the third guide member has the third cleaning medium channel.

[0008] In combination with the first aspect, in a possible embodiment, the filtering device also includes: a control component, which is connected to the guide component, and when the exhaust port is in the second working state, the control component is used to control the accommodating chamber to be connected with the first cleaning medium channel, the second cleaning medium channel, and the third cleaning medium channel in sequence, so that the first cleaning medium, the second cleaning medium, and the third cleaning medium are input into the accommodating chamber in sequence, and the second cleaning medium and the third cleaning medium are discharged through the drain port.

[0009] In combination with the first aspect, in a possible embodiment, the control component is also used to control the flow rate of the first cleaning medium, the second cleaning medium and the third cleaning medium, and after the first cleaning medium is input into the containing cavity, the second cleaning medium, the third cleaning medium and the second cleaning medium are input into the containing cavity in sequence to clean the filter layer.

[0010] In combination with the first aspect, in a possible implementation, the control component is also used to control the on and off of the exhaust port so that the exhaust port switches between the first working state and the second working state, and when the exhaust port is in the second working state, the exhaust port is connected to the accommodating cavity through an air path.

[0011] In combination with the first aspect, in a possible implementation, when the exhaust port is in the first working state, the accommodating chamber has a first preset liquid level height, and when the exhaust port is in the second working state, the accommodating chamber has a second preset liquid level height, the first preset liquid level height is greater than the second preset liquid level height, and the second preset liquid level height is equal to the preset height.

[0012] In combination with the first aspect, in a possible implementation manner, the liquid inlet end is connected to the raw liquid channel, and when the exhaust port is in the first working state, the accommodating cavity is communicated with the raw liquid channel, and a filter material is arranged on the filter layer, and the filter material has a preset specific surface area and a preset filter material specific gravity, and the preset specific surface area is 25m 2 / g~32m 2 / g, the preset filter material specific gravity is 1.1g / cm 3 ~1.5g / cm 3 .

[0013] In a second aspect, the present application provides a filtration system, comprising the above-mentioned filtration device.

[0014] In a third aspect, the present application provides a cleaning method, which adopts the above-mentioned filtering equipment, and the cleaning method comprises the following steps: inputting a first cleaning medium, a second cleaning medium, and a third cleaning medium into the tank body in sequence to clean the filter layer, and the cleaning direction of the first cleaning medium is the same as the cleaning direction of the second cleaning medium, and the cleaning direction of the first cleaning medium is opposite to the cleaning direction of the third cleaning medium.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] The filtration equipment provided by the present application has a drain port for discharging cleaning liquid for cleaning the filter layer. The drain port is a sewage outlet. By setting the drain port between the liquid inlet end and the liquid outlet end, compared with the traditional sewage outlet being set at the liquid inlet end, the position of the sewage outlet is lowered, and the distance between the sewage outlet and the filter layer is reduced, thereby accelerating the discharge of suspended matter generated after the cleaning medium cleans the filter layer, and can efficiently separate the suspended matter from the tank body, thereby enhancing the cleaning effect of the filter layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic diagram of the side structure of the filtering device is shown;

[0019] Figure 2 A schematic cross-sectional view of a filtering device is shown;

[0020] Figure 3 A schematic flow chart of the cleaning method is shown.

[0021] Description of main component symbols:

[0022] 100-tank body; 110-accommodating chamber; 120-liquid inlet; 121-exhaust port; 130-liquid outlet; 140-liquid discharge port; 200-filter layer; 300-support layer; 400-flow guide assembly; 410-first flow guide member; 411-first cleaning medium channel; 420-second flow guide member; 421-second cleaning medium channel; 430-third flow guide member; 431-third cleaning medium channel; 440-fourth flow guide member; 441-filtrate channel; 450-fifth flow guide member; 451-drainage channel; 460-sixth flow guide member; 461-airflow channel; 470-seventh flow guide member; 471-raw liquid channel. 500-control component; 510-first control valve; 520-second control valve; 530-third control valve; 540-fourth control valve; 550-fifth control valve; 560-sixth control valve; 570-seventh control valve; 600-nozzle; 700-detection component; 710-first detection component; 720-second detection component; 800-transparent window. DETAILED DESCRIPTION

[0023] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0024] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0026] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0027] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0028] Embodiment 1

[0029] See also Figure 1 and Figure 2, an embodiment of the present application provides a filtering device, the filtering device comprising: a tank body 100 and a filter layer 200. The tank body 100 has a accommodating chamber 110, and the tank body 100 comprises a liquid inlet end 120 and a liquid outlet end 130. An exhaust port 121 is provided on the liquid inlet end 120. The liquid outlet end 130 connects the filtrate channel 441 and the cleaning medium channel. A liquid discharge port 140 is provided on the tank body 100. The liquid discharge port 140 is located between the liquid inlet end 120 and the liquid outlet end 130, and the liquid discharge port 140 has a preset height. The filter layer 200 is arranged in the tank body 100, and the filter layer 200 is located at one end of the liquid discharge port 140 away from the liquid inlet end 120. The exhaust port 121 has a first working state and a second working state. When the exhaust port 121 is in the first working state, the filtrate channel 441 is connected with the accommodating chamber 110 so that the filtrate is output through the filtrate channel 441. When the exhaust port 121 is in the second working state, the liquid level in the accommodating chamber 110 is at the preset height, and the cleaning medium channel is connected with the accommodating chamber 110 so that the cleaning medium can be input into the accommodating chamber 110 and clean the filter layer 200, and the cleaning medium is discharged through the drain port 140. The drain port 140 is used to discharge the cleaning liquid for cleaning the filter layer. The drain port 140 is also a sewage outlet. By arranging the drain port 140 between the liquid inlet end 120 and the liquid outlet end 130, compared with the traditional sewage outlet being arranged at the liquid inlet end 120, the position of the sewage outlet is lowered, and the distance between the sewage outlet and the filter layer 200 is reduced, thereby accelerating the discharge of suspended matter generated after the cleaning medium cleans the filter layer 200, and can efficiently separate the suspended matter from the tank body 100, thereby enhancing the cleaning effect of the filter layer 200.

[0030] See also Figure 1 In some embodiments, the tank body 100 is arranged along a first preset direction, and a transparent window 800 is arranged on the tank body 100. The transparent window 800 is arranged on the side wall of the tank body 100 along the first preset direction. The filter layer 200 is arranged along a second preset direction. The second preset direction is perpendicular to the first preset direction.

[0031] In some embodiments, the length of the filter layer 200 in the first preset direction is 30 cm to 50 cm, and a filter material is disposed on the filter layer 200. The filter material is a porous lightweight filter material, and the filter material has a preset specific surface area and a preset filter material specific gravity.

[0032] In some embodiments, the preset specific surface area is 25m 2 / g~32m 2 / g, the preset filter material specific gravity is 1.1g / cm3 ~1.5g / cm 3 .

[0033] It is understandable that compared with traditional quartz sand filter media, porous lightweight filter media has better adsorption capacity due to its large specific surface area and small specific gravity, and is not easy to compact. The comparison of the characteristics of porous lightweight filter media and quartz sand filter media is shown in Table 1.

[0034] Table 1 Comparison of porous lightweight filter media and quartz sand filter media

[0035]

[0036] See also Figure 2 In some embodiments, the filtering device further includes: a supporting layer 300 . The supporting layer 300 is disposed in the containing cavity 110 . The filtering layer 200 is disposed on the supporting layer 300 .

[0037] See also Figure 1 and Figure 2 In some embodiments, the filter device further includes: a flow guide component 400. The flow guide component 400 includes a first flow guide member 410, a second flow guide member 420, a third flow guide member 430, a fourth flow guide member 440, a fifth flow guide member 450, a sixth flow guide member 460, and a seventh flow guide member 470. The first flow guide member 410 is connected to the liquid outlet 130, and the first flow guide member 410 has a first cleaning medium channel 411. The second flow guide member 420 is connected to the liquid outlet 130, and the second flow guide member 420 has a second cleaning medium channel 421. The third flow guide member 430 is located between the exhaust port 121 and the drain port 140, and the third flow guide member 430 has the third cleaning medium channel 431. The fourth flow guide member 440 is connected to the liquid outlet 130, and the fourth flow guide member 440 has a filtrate channel 441. The fifth guide member 450 is connected to the liquid discharge port 140 and has a sewage discharge channel 451. The sixth guide member 460 is connected to the exhaust port 121 and has an air flow channel 461. The seventh guide member 470 is connected to the liquid inlet port 120 and has a raw liquid channel 471.

[0038] In some embodiments, the first flow guide 410 , the second flow guide 420 , the third flow guide 430 , the fourth flow guide 440 , the fifth flow guide 450 , the sixth flow guide 460 , and the seventh flow guide 470 are all cylindrical flow guide tubes.

[0039] In other embodiments, the first flow guide 410 , the second flow guide 420 , the third flow guide 430 , the fourth flow guide 440 , the fifth flow guide 450 , the sixth flow guide 460 , and the seventh flow guide 470 may also be prismatic.

[0040] See also Figure 1 and Figure 2 In some embodiments, the filtering device further includes: a control assembly 500. The control assembly 500 includes: a first control valve 510, a second control valve 520, a third control valve 530, a fourth control valve 540, a fifth control valve 550, a sixth control valve 560 and a seventh control valve 570. The first control valve 510 is disposed on the first flow guide 410. The second control valve 520 is disposed on the second flow guide 420. The third control valve 530 is disposed on the third flow guide 430. The fourth control valve 540 is disposed on the fourth flow guide 440. The fifth control valve 550 is disposed on the fifth flow guide 450. The sixth control valve 560 is disposed on the sixth flow guide 460. The seventh control valve 570 is disposed on the seventh flow guide 470.

[0041] In some embodiments, the first flow guide 410 has the first cleaning medium flowing through it, and the first control valve 510 is used to control the flow rate of the first cleaning medium flowing into the accommodating chamber 110. The second flow guide 420 has the second cleaning medium flowing through it, and the second control valve 520 is used to control the flow rate of the second cleaning medium flowing into the accommodating chamber 110. The third flow guide 430 has the third cleaning medium flowing through it, and the third control valve 530 is used to control the flow rate of the third cleaning medium flowing into the accommodating chamber 110. The fourth control valve 540 is used to control the connection and disconnection between the accommodating chamber 110 and the filtrate channel 441. The fifth control valve 550 is used to control the connection and disconnection between the accommodating chamber 110 and the sewage channel 451. The sixth control valve 560 is used to control the connection and disconnection between the accommodating chamber 110 and the airflow channel 461. The raw liquid to be filtered flows through the seventh flow guide 470, and the seventh control valve 570 is used to control the flow rate of the raw liquid flowing into the accommodating chamber 110.

[0042] In some embodiments, the sixth control valve 560 switches the communication state between the accommodating chamber 110 and the air flow channel 461, so that the exhaust port 121 switches between the first working state and the second working state. When the exhaust port 121 is in the first working state, the exhaust port 121 is blocked to close the accommodating chamber 110, and when the exhaust port 121 is in the second working state, the exhaust port 121 is connected to the accommodating chamber 110 through an air path.

[0043] It can be understood that the first working state is a filtering state, that is, the sixth control valve 560 is closed, the third control valve 530 is opened, and the seventh control valve 570 is opened, so that the raw liquid flows into the accommodating chamber 110 through the liquid inlet end 120, and the filtrate generated after the raw liquid is filtered by the filter layer 200 is input into the third guide member 430 through the liquid outlet end 130, and is output by the third guide member 430 to complete the filtration of the raw liquid.

[0044] In some embodiments, the first cleaning medium is air, the second cleaning medium is water, and the third cleaning medium is water.

[0045] It can be understood that the second working state is a cleaning state, that is, in the second working state, the sixth control valve 560 is opened, and the fourth control valve 540 and the seventh control valve 570 are closed, so that the filter layer 200 is cleaned three times by the first cleaning medium, the second cleaning medium, and the third cleaning medium. The first cleaning process is: the first control valve 510 is opened, so that the first cleaning medium enters the accommodating chamber 110 from the liquid outlet 130, and the filter layer 200 is cleaned for the first time. The second cleaning process is: the first control valve 510 is closed, the second control valve 520 is opened, so that the second cleaning medium enters the accommodating chamber 110 from the liquid outlet 130, and the filter layer 200 is cleaned for the second time, and then the second control valve 520 is closed, and the fifth control valve 550 is opened after standing for a first preset time, so that the cleaned sewage is output through the fifth liquid guide. The third cleaning process is: open the third control valve 530 and the second control valve 520, so that the third cleaning medium and the second cleaning medium simultaneously clean the filter layer 200 for the third time, so as to enhance the cleaning effect of the filter layer 200, and the cleaning direction of the third cleaning medium is opposite to the cleaning direction of the second cleaning medium, and the cleaned sewage is output through the fifth liquid guide.

[0046] See also Figure 2 In some embodiments, the third liquid guide is provided with a nozzle 600. The nozzle 600 is located in the accommodating chamber 110. The third cleaning medium is sprayed through the nozzle 600 to accelerate the speed at which the suspended foam floating on the inner wall of the tank body 100 and the sewage flows into the fifth liquid guide, thereby improving the cleaning efficiency of the filter layer 200.

[0047] In some embodiments, when the exhaust port 121 is in the first working state, the accommodating chamber 110 has a first preset liquid level height. When the exhaust port 121 is in the second working state, the accommodating chamber 110 has a second preset liquid level height. The first preset liquid level height is greater than the second preset liquid level height, and the second preset liquid level height is equal to the preset height.

[0048] It is understandable that during the first cleaning, air washing the filter layer 200 will cause the water in the accommodating cavity 110 to form turbulence, and the space reserved in the accommodating cavity 110 can provide turbulent space for air washing, so that the filter material can be fully stirred, collided, rubbed and washed.

[0049] In some embodiments, the filtering device further includes: a controller (not shown in the figure). The controller is connected to the first control valve 510, the second control valve 520, the third control valve 530, the fourth control valve 540, the fifth control valve 550, the sixth control valve and the seventh control valve 570, and can control the operating state and operating time of the first control valve 510, the second control valve 520, the third control valve 530, the fourth control valve 540, the fifth control valve 550, the sixth control valve and the seventh control valve 570 respectively.

[0050] See also Figure 1 and Figure 2 In some embodiments, the filtering device further includes: a detection assembly 700. The detection assembly 700 includes: a first detection member 710 and a second detection member 720. The first detection member 710 is disposed on the liquid inlet end 120, and the first detection member 710 is a pressure sensor. The second detection member 720 is disposed on the side wall of the tank body 100, and the second detection member 720 is a pressure sensor.

[0051] In some embodiments, the first detection member 710 is connected to the controller, and the first detection member detects the pressure value in real time and feeds back to the controller. The second detection member 720 is connected to the controller, and the second detection member 720 detects the pressure value in real time and feeds back to the controller. The controller can calculate the liquid level in the accommodating chamber 110 by the difference between the pressure values ​​detected by the first detection member 710 and the second detection member 720.

[0052] The filtering device in the present application uses a porous lightweight filter material with a large specific surface area and a small specific gravity to enhance the adsorption capacity, thereby improving the filtering effect. In addition, the thinner filter layer 200 is easy to clean, which can improve the problem of the filter layer 200 being hardened. By cleaning the filter layer 200 three times in sequence, the cleaning effect of the filter layer 200 can be enhanced, so that the filter layer 200 can filter more impurities to improve the filtering effect and filtering efficiency. The cleaning condition of the filter layer 200 in the accommodating cavity 110 can be cleaned and observed through the transparent window 800.

[0053] Embodiment 2

[0054] An embodiment of the present application provides a filtration system (not shown in the figure), which includes the filtration device in any one of the above-mentioned embodiments, and therefore has all the beneficial effects of the filtration device in any one of the above-mentioned embodiments, which will not be described one by one here.

[0055] Embodiment 3

[0056] See also Figure 3 The present application embodiment provides a cleaning method, the cleaning method adopts the filtering device in any one of the above-mentioned embodiments 1, and the cleaning method comprises the following steps:

[0057] S100: closing the fourth control valve and the seventh control valve to switch to a cleaning state, and opening the sixth control valve to allow the accommodating chamber to communicate with the air flow channel;

[0058] S200: opening the first control valve to allow the first cleaning medium to be input into the containing cavity from the liquid outlet end, and to perform the first cleaning on the filter layer;

[0059] S300: closing the first control valve and opening the second control valve, so that the second cleaning medium is input into the containing cavity from the liquid outlet end, and the filter layer is cleaned for the second time, and then closing the second control valve, after standing for a first preset time, opening the fifth control valve, so that the cleaned sewage is output through the fifth liquid guide member;

[0060] S400: Open the third control valve and the second control valve so that the third cleaning medium and the second cleaning medium simultaneously clean the filter layer for the third time, and the cleaning direction of the third cleaning medium is opposite to that of the second cleaning medium, and the cleaned sewage is output through the fifth liquid guide.

[0061] In some embodiments, the height of the liquid level in the accommodating chamber in S100 is the same as the height of the fifth liquid guiding member, and the sixth control valve is opened to make the air pressure inside and outside the accommodating chamber the same.

[0062] In some embodiments, the first cleaning medium in S200 is air, and compressed air is input into the accommodating chamber so that the filter material in the filter layer can be blown up, thereby being sufficiently stirred and having a good cleaning effect.

[0063] In some embodiments, the first cleaning medium in S300 is water. By inputting water into the containing cavity to push the sewage in the filter layer to move toward the liquid inlet end, the separation of the filter layer and impurities can be accelerated. After standing for the first preset time, the filter material in the filter layer can be naturally settled to be separated from the impurities.

[0064] In some embodiments, the sewage cleaned in S400 needs to be left to stand for a second preset time after being output through the fifth liquid guide member to allow the filter material to settle.

[0065] In some embodiments, the second cleaning medium in S300 is input into the containing chamber at a first preset flow rate, and the second cleaning medium in S400 is input into the containing chamber at a second preset flow rate, and the second preset flow rate is smaller than the first preset flow rate, that is, during the third cleaning process, the second cleaning medium is input into the containing chamber at a smaller flow rate, and the second cleaning medium is input onto the filter material by spraying, so as to sweep the suspended foam floating in the tank body into the fifth liquid guiding member.

[0066] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0067] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A filtering device, characterized in that: include: A tank body, wherein the tank body has a containing cavity, the tank body includes a liquid inlet end and a liquid outlet end, the liquid inlet end is provided with an exhaust port, the liquid outlet end is connected to a filtrate channel and a cleaning medium channel, and the tank body is provided with a liquid discharge port, the liquid discharge port is located between the liquid inlet end and the liquid outlet end, and the liquid discharge port has a preset height; A filter layer, wherein the filter layer is arranged in the tank body, and the filter layer is located at an end of the drain port away from the liquid inlet end, the exhaust port has a first working state and a second working state, when the exhaust port is in the first working state, the filtrate channel is communicated with the accommodating chamber so that the filtrate is output through the filtrate channel, when the exhaust port is in the second working state, the liquid level in the accommodating chamber is at the preset height, and the cleaning medium channel is communicated with the accommodating chamber so that the cleaning medium can be input into the accommodating chamber and the filter layer is cleaned, and the cleaning medium is discharged through the drain port.

2. The filtering device according to claim 1, characterized in that The filtering device also includes: A flow guide component is arranged on the tank body, and the flow guide component has a first cleaning medium channel, a second cleaning medium channel and a third cleaning medium channel, and the accommodating cavity can be connected with the first cleaning medium channel, the second cleaning medium channel and the third cleaning medium channel in sequence.

3. The filtering device according to claim 2, characterized in that The flow guide assembly comprises: A first flow guide member, the first flow guide member is connected to the liquid outlet, and the first flow guide member has a first cleaning medium channel; A second flow guide member, the second flow guide member is connected to the liquid outlet, and the second flow guide member has a second cleaning medium channel; A third flow guide member is provided on the tank body, the third flow guide member is located between the exhaust port and the liquid discharge port, and the third flow guide member has the third cleaning medium channel.

4. The filtering device according to claim 2, characterized in that: The filtering device also includes: A control component is connected to the guide component, and when the exhaust port is in the second working state, the control component is used to control the accommodating chamber to be connected with the first cleaning medium channel, the second cleaning medium channel, and the third cleaning medium channel in sequence, so that the first cleaning medium, the second cleaning medium, and the third cleaning medium are input into the accommodating chamber in sequence, and the second cleaning medium and the third cleaning medium are discharged through the drain port.

5. The filtering device according to claim 4, characterized in that The control component is also used to control the flow of the first cleaning medium, the second cleaning medium and the third cleaning medium, and after the first cleaning medium is input into the containing cavity, the second cleaning medium, the third cleaning medium and the second cleaning medium are input into the containing cavity in sequence to clean the filter layer.

6. The filtering device according to claim 4, characterized in that The control component is also used to control the on and off of the exhaust port so that the exhaust port switches between the first working state and the second working state, and when the exhaust port is in the second working state, the exhaust port is connected to the accommodating cavity through an air path.

7. The filtering device according to any one of claims 4 to 6, characterized in that: When the exhaust port is in the first working state, the accommodating chamber has a first preset liquid level height, and when the exhaust port is in the second working state, the accommodating chamber has a second preset liquid level height, the first preset liquid level height is greater than the second preset liquid level height, and the second preset liquid level height is equal to the preset height.

8. The filtering device according to claim 1, characterized in that The liquid inlet end is connected to the raw liquid channel, and when the exhaust port is in the first working state, the accommodating cavity is connected to the raw liquid channel, and a filter material is arranged on the filter layer, and the filter material has a preset specific surface area and a preset filter material specific gravity, and the preset specific surface area is 25m 2 / g~32m 2 / g, the preset filter material specific gravity is 1.1g / cm 3 ~1.5g / cm 3 .

9. A filtering system, characterized in that: A filtering device comprising any one of claims 1-8.

10. A cleaning method, characterized in that: Using the filtering device according to any one of claims 1 to 8, the cleaning method comprises the following steps: The first cleaning medium, the second cleaning medium and the third cleaning medium are sequentially input into the tank body to clean the filter layer, and the cleaning direction of the first cleaning medium is the same as that of the second cleaning medium, and the cleaning direction of the first cleaning medium is opposite to that of the third cleaning medium.

Images