Filtering device

Abstract

This application relates to the field of water treatment equipment technology, and in particular to a filtration device. The filtration device includes: a filter body, the interior of which forms a filter chamber; filter media disposed within the filter chamber; and a stirring device disposed within the filter body. The stirring device includes a fixed drive unit and a stirring head, with the stirring head disposed within the fixed drive unit. At least the stirring head is located within the filter chamber. The filter body is provided with an inlet and an outlet. The filtration device provided by this application has multiple operating modes, and can not only perform filtration operations but also thoroughly clean the filter media. The cleaning of the filter media via stirring provides excellent cleaning results and effectively prevents filter media caking.

Description

Technical Field

[0001] This application relates to the field of water treatment equipment technology, and in particular to a filtration device. Background Technology

[0002] Currently, filters are an important component of greywater reuse systems. Sand filters and multi-media filters are commonly used advanced treatment equipment in these systems. Sand filters are primarily used to remove suspended solids (SS), colloids, some organic matter, and microorganisms, improving effluent quality. Sand filters can filter particles of 20–50 μm, and the effluent turbidity can typically be controlled to <5 NTU. The disadvantages of sand filters are twofold: First, the filter media is prone to caking or clogging. The sand layer may clump due to biofilm growth or colloid deposition, leading to decreased filtration efficiency, incomplete backwashing, and localized caking of the filter media, affecting the filtration effect. Second, the filtration rate is slow, typically 4–12 m / h (most commonly 8–10 m / h), requiring a large footprint, especially when the system processes large volumes of water.

[0003] Multi-media filters achieve tiered filtration through layers of filter media with different particle sizes and densities (such as anthracite and quartz sand), offering better suspended solids removal than single-layer sand filters. They can trap particles of 10–40 μm, resulting in effluent turbidity <3 NTU. The upper coarse filter media (anthracite) intercepts large particles, while the lower fine filter media (quartz sand) provides deep filtration, allowing for 20%–30% longer backwash intervals compared to single-layer sand filters. The main disadvantages of multi-media filters are: firstly, the backwash intensity is difficult to set, as different density filter media (such as anthracite and quartz sand) may mix during backwashing, reducing filtration efficiency; and biofilm growth or colloidal deposition may lead to the formation of "mud balls" at the interfaces between different layers. Secondly, the filtration rate is slow, with a dual-layer filter media (anthracite + quartz sand) filtration rate range of 10–20 m / h, resulting in a larger equipment footprint, especially when the system processes large volumes of water. Furthermore, due to the need for multiple layers of filter media, the tank volume is typically 20%–40% larger than that of a single-layer sand filter. Utility Model Content

[0004] The purpose of this application is to provide a filtration device that, to a certain extent, solves the technical problems of existing filters suitable for greywater reuse systems, such as poor backwashing effect and filter media caking.

[0005] This application provides a filtration device, comprising: a filter body, wherein a filter cavity is formed inside the filter body;

[0006] Filter media, wherein the filter media is disposed within the filter chamber;

[0007] A stirring device is disposed on the filter body; the stirring device includes a fixed drive unit and a stirring head, the stirring head being disposed on the fixed drive unit; at least the stirring head is located within the filter chamber.

[0008] The filter body is equipped with an inlet and an outlet.

[0009] In the above technical solution, the filtration device further includes:

[0010] A water inlet pipe, which is connected to the water inlet;

[0011] A water inlet valve is provided in the water inlet pipe;

[0012] A water pump is installed in the inlet pipe.

[0013] In any of the above technical solutions, the filtration device further includes:

[0014] A water outlet pipe, which is connected to the water outlet;

[0015] A water outlet valve is provided on the water outlet pipe.

[0016] In any of the above technical solutions, the filtration device further includes:

[0017] A sewage pipe, which is connected to the water inlet;

[0018] A drain valve is provided on the drain pipe.

[0019] In any of the above technical solutions, the filtration device further includes:

[0020] A drain pipe, which is connected to the water outlet;

[0021] A drain valve is provided on the drain pipe.

[0022] In any of the above technical solutions, the filtration device further includes:

[0023] A first connecting pipe, which is connected to the water outlet;

[0024] The second connecting pipe is connected to the water outlet;

[0025] The lengths of the first connecting pipe and the second connecting pipe both extend along the height direction of the filter body.

[0026] In any of the above technical solutions, the filtration device further includes:

[0027] A cleaning inlet valve is provided in the first connecting pipe;

[0028] A cleaning drain valve is provided in the second connecting pipe.

[0029] In any of the above technical solutions, the water inlet is further located at the bottom of the filter body; the water outlet is located at the top of the filter body.

[0030] In any of the above technical solutions, the number of filter media is multiple, and each filter media has a cuboid block structure.

[0031] In any of the above technical solutions, the filter media is further described as polypropylene filter material.

[0032] Compared with the prior art, the beneficial effects of this application are as follows:

[0033] The filtration device provided in this application includes: a filter body, the interior of which forms a filter chamber; filter media, which is disposed within the filter chamber; a stirring device, which is disposed within the filter body; the stirring device includes a fixed drive unit and a stirring head, with the stirring head disposed within the fixed drive unit; at least the stirring head is located within the filter chamber; the filter body is provided with an inlet and an outlet.

[0034] The filtration device provided in this application has multiple operating modes. It can not only perform filtration operations, but also thoroughly clean the filter media by stirring. The cleaning effect is good and can effectively prevent the filter media from caking. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0036] Figure 1 A schematic diagram of the first operating condition of the filtration device provided in the embodiments of this application;

[0037] Figure 2 A schematic diagram illustrating a second operating condition of the filtration device provided in an embodiment of this application;

[0038] Figure 3 A schematic diagram illustrating a third operating condition of the filtration device provided in the embodiments of this application;

[0039] Figure 4 This is a schematic diagram of the fourth operating condition of the filtration device provided in the embodiments of this application.

[0040] Figure label:

[0041] 1-Filter body, 2-Filter packing, 3-Agitator, 4-First connecting pipe, 5-Second connecting pipe, 6-Inlet pipe, 7-Inlet valve, 8-Water pump, 9-Outlet pipe, 10-Outlet valve, 11-Drain pipe, 12-Drain valve, 13-First connecting pipe, 14-Second connecting pipe, 15-Cleaning inlet valve, 16-Cleaning drain valve, 17-Drain pipe, 18-Drain valve. Detailed Implementation

[0042] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0043] The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application.

[0044] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0045] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0046] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0047] The following reference Figures 1 to 4The filtering device described in the embodiments of this application.

[0048] See Figures 1 to 4 As shown, an embodiment of this application provides a filtration device, which is particularly suitable for greywater reuse systems. The filtration device includes a filter body 1, filter media 2, and a stirring device 3. The filter body 1 has a tank structure with a hollow interior forming a filter chamber. The filter media 2 is disposed within the filter body 1. The stirring device 3 is disposed within the filter body 1, with at least its stirring head located within the filter chamber. When the stirring device 3 is activated, the liquid and filter media 2 within the filter chamber begin to rotate. During rotation, the liquid cleans the filter media 2, satisfying the cleaning requirements of the filter media 2 and preventing it from caking.

[0049] Preferably, the filter body 1 is made of carbon steel, or the inner wall of the filter body 1 is lined with carbon steel rubber to improve the corrosion resistance of the filter body 1.

[0050] Specifically, the filter body 1 is provided with an inlet and an outlet. The water to be filtered (hereinafter referred to as raw water) flows into the filter body 1 through the inlet. The raw water gradually flows through the filter media 2, and after filtering out impurities, it flows out through the outlet. Preferably, the inlet is located at the bottom of the filter body 1, and the outlet is located at the top of the filter body 1. After entering the filter body 1, the raw water gradually passes through the filter media 2 from bottom to top, ensuring the filtration effect of the raw water. More preferably, the inlet is provided with a first connecting pipe 4, and the outlet is provided with a second connecting pipe 5. Both the first connecting pipe 4 and the second connecting pipe 5 are connected to the filter chamber.

[0051] Furthermore, the number of filter media 2 is multiple, and each filter media 2 is block-shaped. Preferably, the filter media 2 has a cuboid or cube shape, but it is not limited to these. The size of a single filter media is 5mm × 5mm × 3mm. More preferably, the filter media 2 is specifically PP (Polypropylene) media. By setting the filter media 2 to a polyhedral shape, the specific surface area of ​​a single filter media 2 is increased, the operating resistance of the filter is reduced, and with the injection of raw water and the increase of the operating time of this filtration device, the irregular stacking state of all the filter media 2, compared with sand filters and multi-media filters, increases the porosity between all the filter media 2, ensuring the smoothness of the raw water injection process from bottom to top, reducing the filter media filtration pressure difference, and effectively increasing the filtration rate. The filtration rate range can reach 40-70m / h, effectively reducing the initial investment and operating cost of the equipment.

[0052] Preferably, in a static state, the thickness of the filter layer filled with filter media is not less than 1 meter, and more preferably 1 meter.

[0053] In addition, since the filter media 2 has a polyhedral shape, compared with the spherical media, the edges and sharp corners of the filter media 2 are increased. During the cleaning stage, the intensity of the collision and friction between the filter media 2 and the contact area are increased, thereby effectively improving the cleaning effect of each filter media 2 and effectively reducing the occurrence of filter plate caking.

[0054] Furthermore, this filtration device also includes an inlet pipe 6, a water pump 8, and an inlet valve 7. One end of the inlet pipe 6 is connected to the first connecting pipe 13, and the other end of the inlet pipe 6 is connected to a source for supplying raw water. The water pump 8 is located on the inlet pipe 6 and provides power to pump the raw water through the inlet pipe 6 and the inlet into the filter body 1. Preferably, the water supply pressure is 1.5 bar to 2.0 bar. The inlet valve 7 is located on the inlet pipe 6. Preferably, the inlet valve 7 is located between the water pump 8 and the inlet, and the inlet valve 7 is used to control the flow of water within the inlet pipe 6.

[0055] Furthermore, this filtration device also includes a drain pipe 17 and a drain valve 18. One end of the drain pipe 17 is connected to the first connecting pipe 4, and the drain valve 18 is installed on the drain pipe 17. The drain valve 18 is used to control the flow of water in the drain pipe 17. The drain pipe 17 is used to drain the water in the filter body 1 when the filtration device is stopped. When the water pump 8 is turned off and all valves are opened, the water in each pipe can eventually be discharged through the drain pipe 17.

[0056] Furthermore, the filtration device also includes a water outlet pipe 9 and a water outlet valve 10. One end of the water outlet pipe 9 is connected to the second connecting pipe 14, and the water outlet valve 10 is installed on the water outlet pipe 9. The filtered water flows through the water outlet pipe 9 to a designated location, and the water outlet valve 10 is used to control the flow of water in the water outlet pipe 9.

[0057] Furthermore, the filtration device also includes a drain pipe 11 and a drain valve 12. One end of the drain pipe 11 is connected to the second connecting pipe 5, and the drain valve 12 is installed on the drain pipe 11. The drain pipe 11 is used to discharge the cleaning water in the filter body 1 after the stirring device 3 is stopped and the filter packing 2 is cleaned. The drain valve 12 is used to control the opening and closing of the water passage in the drain pipe 11.

[0058] Furthermore, the filtration device also includes a first connecting pipe 13 and a second connecting pipe 14. One end of the first connecting pipe 13 is connected to the inlet pipe 6, and the other end of the first connecting pipe 13 is connected to the outlet pipe 9. One end of the second connecting pipe 14 is connected to the drain pipe 17, and the other end of the second connecting pipe 14 is connected to the drain pipe 11. The lengths of the first connecting pipe 13 and the second connecting pipe 14 both extend along the height direction of the filter body 1. Preferably, the lengths of the first connecting pipe 13 and the second connecting pipe 14 are both greater than the height of the filter body 1.

[0059] It should be noted that the connection point between the first connecting pipe 13 and the outlet pipe 9 is located between the outlet valve 10 and the second connecting pipe 5.

[0060] The stirring device 3 also includes a fixed drive unit, with a stirring head disposed in the fixed drive unit. The fixed drive unit includes a sealed housing and a drive motor. The drive motor is disposed inside the sealed housing, and the stirring head is disposed outside the sealed housing and connected to the output shaft of the drive motor. The drive motor can drive the stirring head to rotate.

[0061] like Figure 1 As shown, when the filtration device is in normal operation, the water pump 8 is turned on, the inlet valve 7 and the outlet valve 10 are turned on, and other valves and the stirring device 3 are turned off. The water to be filtered flows into the filter body 1 through the inlet pipe 6, the inlet valve 7 and the first connecting pipe 4. The liquid level in the filter body 1 gradually rises, and the raw water can flow through each layer and each filter media 2, thereby filtering the raw water. The filtered water flows out through the second connecting pipe 5, the outlet pipe 9 and the outlet valve 10 and flows to the next water treatment process.

[0062] like Figure 2 As shown, after the filter device reaches the set pressure or the set operating time, the filter media 2 needs to be backwashed. During the cleaning of the filter media 2, firstly, the water pump 8, inlet valve 7, outlet valve 10, drain valve 12, and drain valve 18 are closed. Then, the cleaning inlet valve 15 and cleaning outlet valve 16 are opened. At this time, no water flows in or out of the filter body 1, and the water in the filter body 1 stops flowing upwards. The filter chamber is then full or nearly full of water. Each filter media 2 gradually sinks and loosens, reducing the adhesion between the filter media 2. The filter chamber, the first connecting pipe 13, and the second connecting pipe 14 form a U-shaped connecting structure. Then, the stirring device 3 is turned on, and the stirring head stirs the water and filter media 2 in the filter body 1 without water flow. All the filter media 2 begin to rotate with the water flow and continue to tumble randomly. The water flow washes the surface of each filter media 2, and each filter media 2 collides with each other, realizing the backwashing of the filter media 2. The stirring device 3 continues to stir for 2 to 3 minutes, and the time can be appropriately extended to ensure that the filter media 2 is thoroughly backwashed, ensuring the cleanliness of the filter media 2 and that there is no caking.

[0063] It should be noted that during the backwashing process, the cleaning inlet valve 15 and the cleaning outlet valve 16 are in the open state, so that the second connecting pipe 14 is connected to the filter chamber. After the stirring device 3 starts cleaning, a small amount of water overflows and flows into the drain pipe 11 to prevent the filter body 1 from being pressurized. It can be seen that the filter device provided in this embodiment does not introduce new water or require additional water priming at the beginning of the backwashing process, reducing the consumption of backwash water and eliminating the need for a backwash pump.

[0064] like Figure 3 As shown, when the filtration device is in the cleaning water discharge mode, the water pump 8 is turned on, the cleaning inlet valve 15, the cleaning drain valve 16, and the stirring device 3 are kept open, the inlet valve 7 and the outlet valve 10 are kept closed, and the drain valve 18 is closed. At this time, the water pumped out by the pump body flows from top to bottom into the filter chamber through the first connecting pipe 13 and the second connecting pipe 5. The water in the filter chamber gradually flows out through the first connecting pipe 4 and flows to the second connecting pipe 14. Since the drain valve 18 is in the closed state, the water flows to the second connecting pipe 14 and then through the cleaning drain valve 16 to the right pipe of the drain valve 12, thereby releasing the water in the filter chamber after cleaning the filter media 2. During the drainage process, raw water continuously flows in, which can wash away the impurities remaining on the surface of the filter media 2. The entire backwashing process runs for 2 to 3 minutes, which can be extended appropriately.

[0065] like Figure 4 As shown, when the filter device is in the secondary discharge mode of cleaning water, the stirring device 3 is turned off, the outlet valve 10 is closed, the inlet valve 7 and the drain valve 12 are opened, the cleaning liquid inlet valve 15, the cleaning liquid outlet valve 16 and the sewage valve 18 are closed, and the water pump 8 is turned on. Under the action of the water pump 8, the raw water enters the filter body 1 from bottom to top through the inlet pipe 6 and the first connecting pipe 4. The water flow pushes the filter media 2 upward. After the filter chamber is filled with water, the water flows out through the second connecting pipe 5 and the drain pipe 11, which can perform secondary cleaning of each filter media 2. After a period of time (preferably 2 to 3 minutes), the secondary cleaning water in the filter chamber is discharged.

[0066] Subsequently, the drain valve 12 was closed and the outlet valve 10 was opened, and the filter device returned to normal operation.

[0067] This filtration device allows operators to manually control the opening and closing of each valve. Preferably, the filtration device also includes a PLC, and each valve is either electric or pneumatic, with each valve electrically or communicatively connected to the PLC. The PLC is equipped with an LCD operating screen, allowing operators to remotely control the opening and closing of each valve. Alternatively, the PLC can be used to start and stop each valve according to a predetermined time and duration, thereby adjusting the backwashing cycle and duration based on actual conditions.

[0068] In summary, the filtration device provided in this application has multiple operating modes. It can not only perform filtration operations, but also thoroughly clean the filter media by stirring. The cleaning effect is good and can effectively prevent the filter media from caking.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A filter device, characterized in that include: A filter body, wherein a filter cavity is formed inside the filter body; Filter media, wherein the filter media is disposed within the filter chamber; A stirring device is disposed on the filter body; the stirring device includes a fixed drive unit and a stirring head, the stirring head being disposed on the fixed drive unit; at least the stirring head is located within the filter chamber. The filter body is equipped with an inlet and an outlet.

2. The filter device of claim 1, wherein, The filtration device further includes: A water inlet pipe, which is connected to the water inlet; A water inlet valve is provided in the water inlet pipe; A water pump is installed in the inlet pipe.

3. The filter device of claim 1, wherein, The filtration device further includes: A water outlet pipe, which is connected to the water outlet; A water outlet valve is provided on the water outlet pipe.

4. The filter device of claim 1, wherein, The filtration device further includes: A sewage pipe, which is connected to the water inlet; A drain valve is provided on the drain pipe.

5. The filter device of claim 1, wherein, The filtration device further includes: A drain pipe, which is connected to the water outlet; A drain valve is provided on the drain pipe.

6. The filter device of claim 1, wherein, The filtration device further includes: A first connecting pipe, which is connected to the water outlet; The second connecting pipe is connected to the water outlet; The lengths of the first connecting pipe and the second connecting pipe both extend along the height direction of the filter body.

7. The filter device of claim 6, wherein, The filtration device further includes: A cleaning inlet valve is provided in the first connecting pipe; A cleaning drain valve is provided in the second connecting pipe.

8. The filter device according to any one of claims 1 to 7, characterized in that The water inlet is located at the bottom of the filter body; the water outlet is located at the top of the filter body.

9. The filter device according to any one of claims 1 to 7, characterized in that The number of filter media is multiple, and each filter media has a cuboid block structure.

10. The filter device according to any one of claims 1 to 7, characterized in that The filter media is polypropylene.

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