Diatomite filtering system capable of continuously working

Abstract

The utility model relates to a filtering system, in particular to a diatomite filtering system capable of continuously working, which comprises a liquid outlet / backwashing liquid inlet pipe, a liquid inlet pipe, a backwashing liquid discharge pipe, a plurality of filtering units and a film coating unit communicated with the plurality of filtering units, a three-way joint is arranged at a liquid inlet of each filtering unit, and the liquid inlets of the multiple filtering units are communicated with a liquid inlet pipe and a backwashing liquid discharge pipe through the three-way joints; a liquid inlet stop valve and a backwashing liquid discharge stop valve are respectively arranged at the joint of the three-way joint and the liquid inlet pipe and the joint of the three-way joint and the backwashing liquid discharge pipe; a front filtering unit is arranged at the liquid inlet end of the liquid inlet pipe; and the liquid outlet / backwashing liquid inlets of the plurality of filtering units are communicated with a liquid outlet / backwashing liquid inlet pipe. According to the utility model, one or more filter units can be backwashed as required, and all the filter units do not need to be shut down, so that the filter efficiency can be improved.

Description

Technical Field

[0001] This utility model relates to filtration systems, specifically to a diatomaceous earth filtration system that can operate continuously. Background Technology

[0002] In the field of water treatment, the requirements for treating suspended solids vary depending on the application scenario, but the core objective is to ensure that the water quality meets specific usage requirements. The following is an overview of several typical application scenarios and their corresponding treatment requirements:

[0003] In a cooling system, circulating cooling water plays a crucial role, effectively removing heat through heat exchange. However, this process inevitably leads to the accumulation of impurities. Therefore, strict control over the quality of the circulating cooling water is essential to prevent scale formation within the cooling system.

[0004] Meanwhile, the cooling system requires periodic replenishment of raw water during operation due to water evaporation. This replenished raw water must be properly treated to ensure its quality meets the operating requirements of the cooling system, thereby preventing the introduction of new impurities.

[0005] Industrial wastewater treatment faces even more complex challenges. Wastewater contains a large number of impurities, and direct discharge could potentially violate environmental standards. Membrane treatment technology is widely used as an effective wastewater treatment method, but impurities easily clog the filter membranes, thus reducing treatment efficiency. Therefore, pretreatment steps are particularly important, as they can effectively reduce the risk of membrane clogging and ensure the smooth operation of the treatment process.

[0006] For swimming pool circulation and purification systems, continuous water purification is crucial. Swimming pool water is constantly contaminated during use, necessitating treatment through a circulation and purification system. This process encompasses multiple stages, including filtration and disinfection, with filtration being the most critical, directly impacting water clarity and hygiene. Highly efficient filtration systems not only significantly improve water quality but also play a positive role in energy conservation and emission reduction.

[0007] It is worth mentioning that diatomaceous earth has shown great potential in the field of water treatment due to its unique physical properties—high porosity (90%–92%) and large specific surface area. It can reduce filtration resistance and effectively adsorb fine colloids in water, thereby meeting strict water quality requirements. However, current diatomaceous earth filtration systems still need to be shut down during backwashing, which undoubtedly affects the efficiency of water treatment. Utility Model Content

[0008] The purpose of this invention is to solve the technical problem that existing diatomaceous earth filtration systems require complete shutdown during backwashing, which affects water treatment efficiency, and to provide a diatomaceous earth filtration system that can operate continuously.

[0009] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows:

[0010] A continuously operating diatomaceous earth filtration system includes an outlet / backwash inlet pipe, an inlet pipe, a backwash outlet pipe, and multiple filtration units, as well as a coating unit connected to the multiple filtration units.

[0011] The inlet of the filter unit is equipped with a three-way connector, and the inlets of multiple filter units are connected to the inlet pipe and the backwash drain pipe through the three-way connector; the connection between the three-way connector and the inlet pipe and the backwash drain pipe is respectively equipped with an inlet stop valve and a backwash liquid discharge stop valve.

[0012] The inlet end of the inlet pipe is equipped with a pre-filter unit;

[0013] The liquid outlet / backwash inlet of multiple filter units is connected to the liquid outlet / backwash inlet pipe.

[0014] Furthermore, the filtration unit includes a tank body, and an upper end cap and a lower end cap respectively disposed at the upper and lower ends of the tank body;

[0015] The upper end cap is provided with the liquid outlet / backwash inlet, which is connected to the liquid outlet / backwash inlet pipe;

[0016] The lower end cap is provided with the liquid inlet, and a three-way connector is provided at the liquid inlet of the lower end cap; a water distributor connected to the liquid inlet is provided inside the lower end cap.

[0017] A filter disc is rotatably mounted on the upper end of the tank, and a filter rod is provided at the liquid passage hole of the filter disc located below the filter disc.

[0018] The filter disc has a rotating shaft in the middle. The upper end of the rotating shaft is rotatably mounted on the inner wall of the upper end cap, and the upper end of the rotating shaft extends through the upper end cap to the outside of the upper end cap. The top of the upper end cap has a swing motor with an output shaft connected to the rotating shaft.

[0019] Furthermore, the filter rod includes a support spring, and connectors and plugs respectively fixed to both ends of the support spring;

[0020] The connector is installed inside the liquid passage hole;

[0021] The support spring, connector and plug are provided with a filter screen on the side, and a diatomaceous earth filter membrane is attached to the outside of the filter screen.

[0022] Furthermore, the coating unit includes a diatomaceous earth storage tank, which is filled with diatomaceous earth.

[0023] The top of the diatomite storage tank is equipped with a diatomite delivery pipe and a filter liquid delivery pipe;

[0024] The diatomaceous earth delivery pipe is connected to the tee connectors at the inlet of multiple filtration units, and the filtrate delivery pipe is connected to the outlet / backwash inlet pipe.

[0025] The diatomaceous earth delivery pipe and the filtrate delivery pipe are respectively equipped with a diatomaceous earth delivery pump and a filtrate delivery pump.

[0026] Furthermore, the pre-filtration unit includes a water pump and a hair filter;

[0027] The inlet of the water pump is connected to the outlet of the hair filter via a connecting pipe, and the outlet of the water pump is connected to the inlet pipe.

[0028] The inlet of the hair filter is connected to a water source;

[0029] The liquid outlet / backwash inlet pipe and the connecting pipe are connected by a return pipe. A return shut-off valve and a filter shut-off valve are respectively provided on the return pipe and at the end of the connecting pipe near the liquid outlet of the hair filter.

[0030] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0031] 1. The diatomaceous earth filtration system provided by this utility model can backwash one or more filtration units as needed without shutting down the entire system, thus ensuring that other filtration units can continue to work during the backwashing process and improving the overall filtration efficiency.

[0032] 2. The diatomaceous earth filtration system provided by this utility model, which can operate continuously, is equipped with a diatomaceous earth storage tank, a diatomaceous earth delivery pump and a filtrate delivery pump. This allows for the preparation of a coating solution containing diatomaceous earth in the diatomaceous earth storage tank. The coating solution containing diatomaceous earth is then delivered into the tank by the diatomaceous earth delivery pump to complete the pre-coating before filtration or the coating after backwashing, thus forming a diatomaceous earth filter membrane, which helps to filter raw water or raw liquid.

[0033] 3. The diatomaceous earth filtration system provided by this utility model, which can operate continuously, closes the inlet valve of the filter unit that needs to be backwashed during backwashing and opens the backwash liquid discharge valve. The filtered raw water or raw liquid in the outlet / backwash inlet pipe enters the tank and enters the support spring through the liquid passage. The filtered raw water or raw liquid can backwash the diatomaceous earth filter membrane attached to the filter screen surface. At the same time, by setting up a swing motor, filter disc and filter rod, the swing motor makes the filter rod swing in the liquid, which helps to wash the diatomaceous earth filter membrane on the filter screen surface and enhances the backwashing effect.

[0034] 4. The diatomaceous earth filtration system that can work continuously provided by this utility model, by setting a pre-filtration unit, performs preliminary filtration on the raw water or raw liquid that needs to be filtered, reduces the impact of impurities on subsequent filtration units, and further improves filtration efficiency. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0036] Figure 2 This is a schematic diagram of the filter rod in an embodiment of the present invention.

[0037] Explanation of reference numerals in the attached diagram: 1-Liquid outlet / backwash inlet pipe, 2-Liquid inlet pipe, 3-Backwash drain pipe, 4-Filter unit, 41-Tank body, 42-Upper end cap, 43-Lower end cap, 44-Filter disc, 45-Filter rod, 451-Support spring, 452-Connector, 453-Plug, 454-Filter screen, 46-Rotating shaft, 47-Swing motor, 5-T-connector, 6-Liquid inlet shut-off valve, 7-Backwash liquid discharge shut-off valve, 8-Water pump, 9-Hair filter, 10-Connecting pipe, 11-Return pipe, 12-Return shut-off valve, 13-Filter shut-off valve, 14-Diatomaceous earth storage tank, 15-Diatomaceous earth delivery pipe, 16-Filtration liquid delivery pipe, 17-Diatomaceous earth delivery pump, 18-Filtration liquid delivery pump, 19-Water distributor. Detailed Implementation

[0038] The technical solutions of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0039] like Figure 1 As shown, a continuously operating diatomaceous earth filtration system includes an outlet / backwash inlet pipe 1, an inlet pipe 2, a backwash drain pipe 3, and multiple filter units 4, as well as a coating unit connected to the multiple filter units 4; a three-way connector 5 is provided at the inlet of the filter unit 4, and the inlets of the multiple filter units 4 are all connected to the inlet pipe 2 and the backwash drain pipe 3 through the three-way connector 5; an inlet shut-off valve 6 and a backwash liquid discharge shut-off valve 7 are respectively provided at the connection between the three-way connector 5 and the inlet pipe 2 and the backwash drain pipe 3.

[0040] like Figure 1As shown, to reduce the impact of impurities in the raw water or liquid on the filter unit 4, a pre-filter unit 4 is provided at the inlet end of the inlet pipe 2; the pre-filter unit 4 includes a water pump 8 and a hair filter 9; the inlet of the water pump 8 and the outlet of the hair filter 9 are connected by a connecting pipe 10, and the outlet of the water pump 8 is connected to the inlet pipe 2; the inlet of the hair filter 9 is connected to the water source; the hair filter 9 achieves preliminary filtration of the raw water or liquid. The outlet / backwash inlet pipe 1 and the connecting pipe 10 are connected by a return pipe 11, and a return shut-off valve 12 and a filter shut-off valve 13 are respectively provided on the return pipe 11 and the end of the connecting pipe 10 near the outlet of the hair filter 9.

[0041] like Figure 1 As shown, the liquid outlet / backwash inlet of multiple filter units 4 is connected to the liquid outlet / backwash inlet pipe 1.

[0042] like Figure 1 As shown, the filter unit 4 includes a tank 41, and an upper end cap 42 and a lower end cap 43 respectively disposed at the upper and lower ends of the tank 41; the upper end cap 42 is provided with a liquid outlet / backwash inlet, which is connected to the liquid outlet / backwash inlet pipe 1; the lower end cap 43 is provided with a liquid inlet, and a three-way connector 5 is provided at the liquid inlet of the lower end cap 43; a water distributor 19 connected to the liquid inlet is provided inside the lower end cap 43; a filter disc 44 is rotatably mounted on the upper end of the tank 41, and a filter rod 45 located below the filter disc 44 is provided at the liquid passage hole of the filter disc 44; a rotating shaft 46 is provided in the middle of the filter disc 44, the upper end of the rotating shaft 46 is rotatably mounted on the inner wall of the upper end cap 42, and the upper end of the rotating shaft 46 extends through the upper end cap 42 to the outside of the upper end cap 42; a swing motor 47 with an output shaft connected to the rotating shaft 46 is provided at the top of the upper end cap 42.

[0043] The bottom of the lower end cap 43 is also provided with a drain port for discharging impurities filtered by the diatomaceous earth filter membrane, as well as the diatomaceous earth filter membrane that has been backwashed.

[0044] like Figure 2 As shown, the filter rod 45 includes a support spring 451, and a connector 452 and a plug 453 respectively fixed to both ends of the support spring 451; the connector 452 is installed in the liquid passage hole; the sides of the support spring 451, connector 452 and plug 453 are provided with a filter screen 454, and the outer side of the filter screen 454 is attached with a diatomaceous earth filter membrane.

[0045] like Figure 1As shown, in order to replenish diatomaceous earth into the filter unit 4 to form a diatomaceous earth filter membrane after backwashing, the coating unit includes a diatomaceous earth storage tank 14, which is filled with diatomaceous earth. The top of the diatomaceous earth storage tank 14 is provided with a diatomaceous earth delivery pipe 15 and a filtrate delivery pipe 16. The diatomaceous earth delivery pipe 15 is connected to a three-way connector 5 at the liquid inlet of multiple filter units 4, and the filtrate delivery pipe 16 is connected to the liquid outlet / backwashing inlet pipe 1. The diatomaceous earth delivery pipe 15 and the filtrate delivery pipe 16 are respectively provided with a diatomaceous earth delivery pump 17 and a filtrate delivery pump 18.

[0046] The filtration method of the continuously operating diatomaceous earth filtration system provided by this utility model is as follows:

[0047] 1) Configure valve status:

[0048] A backwashing time is set for each filter unit 4. The backwashing time set for each filter unit 4 is different, so as to facilitate the alternating backwashing of the diatomaceous earth filter membrane in the filter unit 4.

[0049] At the same time, the inlet shut-off valve 6 and the filter shut-off valve 13 on all filter units 4 are in the open state, and the backwash liquid discharge shut-off valve 7 is in the closed state.

[0050] 2) Pre-coated film:

[0051] Weigh out the diatomaceous earth used for pre-coating multiple filter units 4 and add it into the diatomaceous earth storage tank 14; add filtered raw water or raw liquid into the diatomaceous earth storage tank 14, stir and obtain the pre-coating liquid.

[0052] The pre-coating solution in the diatomaceous earth storage tank 14 is introduced into the tank 41 by the diatomaceous earth transfer pump 17. After the pre-coating solution is filtered by the filter screen 454, the diatomaceous earth adheres to the filter screen 454 to form a diatomaceous earth filter membrane. The filtered raw water or raw liquid enters the support spring 451 through the filter screen 454 and enters the space between the upper end cap 42 and the filter plate 44 through the liquid passage hole, and is discharged through the liquid outlet / backwash inlet pipe 1.

[0053] 3) Filtration:

[0054] The raw water or raw liquid to be filtered is pumped into the inlet pipe 2 through the hair filter 9 and the connecting pipe 10 by the water pump 8.

[0055] Raw water or raw liquid enters the water distributor 19 through the three-way connector 5. After being dispersed by the water distributor 19, the raw water or raw liquid enters the filter tank 41.

[0056] After being filtered through the diatomaceous earth filter membrane and filter screen 454, the raw water or raw liquid enters the interior of the support spring 451 and enters the space between the upper end cap 42 and the filter plate 44 through the liquid passage hole. The filtered raw water or raw liquid is discharged through the liquid outlet / backwash inlet pipe 1.

[0057] 4) Backwashing:

[0058] When one of the filter units 4 reaches the backwash time, or when the pressure on the surface of the filter screen 454 increases to the critical value due to the diatomaceous earth, the corresponding inlet shut-off valve 6 of the filter unit 4 is closed and the backwash liquid discharge shut-off valve 7 is opened.

[0059] The filtered raw water or raw liquid enters the tank 41 of the filter unit 4 that needs to be backwashed through the liquid outlet / backwash inlet pipe 1, and enters the support spring 451 through the liquid passage hole. The filtered raw water or raw liquid backwashes the diatomaceous earth filter membrane attached to the surface of the filter screen 454.

[0060] At the same time, the swing motor 47 on the corresponding filter unit 4 is started, so that the swing motor 47 drives the filter disc 44 to rotate back and forth in the tank 41 through the rotating shaft 46, so that the filter rod 45 swings in the liquid, so that the diatomaceous earth layer on the surface of the filter screen 454 is flushed into the tank 41 and discharged through the backwash liquid discharge pipe.

[0061] 5) Coating after backwashing:

[0062] Weigh out the diatomaceous earth used to pre-coat the filter unit 4 after backwashing and add it into the diatomaceous earth storage container 14.

[0063] The filtered raw water or raw liquid in the outlet / backwash inlet pipe 1 is drawn into the diatomaceous earth storage tank 14 by the filtrate transfer pump 18, and the coating liquid is obtained after stirring.

[0064] The coating solution in the diatomaceous earth storage tank 14 is drawn into the tank 41 of the filter unit 4 that needs to be coated after backwashing by the diatomaceous earth transfer pump 17. After the coating solution is filtered by the filter screen 454, the diatomaceous earth adheres to the filter screen 454 to form a diatomaceous earth filter membrane. The filtered raw water or raw liquid enters the support spring 451 through the filter screen 454 and enters the space between the upper end cap 42 and the filter plate 44 through the liquid passage hole, and is discharged through the liquid outlet / backwash inlet pipe 1.

[0065] 6) Repeat steps 3) to 5) above to filter the raw water or raw liquid.

[0066] The diatomaceous earth filtration system provided by this utility model can backwash one or more of the filtration units 44 as needed without shutting down the entire system, thus ensuring that other filtration units 44 can continue to work during the backwashing process, improving the overall filtration efficiency and achieving continuous operation; it is suitable for water treatment of circulating cooling water and makeup water in cooling systems, as well as end-of-pipe water treatment of industrial wastewater and pre-treatment of water for membrane processes.

[0067] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A continuously operating diatomaceous earth filtration system, characterized in that: It includes a liquid outlet / backwash inlet pipe (1), an inlet pipe (2), a backwash outlet pipe (3), and multiple filter units (4), as well as a coating unit connected to the multiple filter units (4); The inlet of the filter unit (4) is provided with a three-way connector (5), and the inlets of multiple filter units (4) are connected to the inlet pipe (2) and the backwash drain pipe (3) through the three-way connector (5); the connection between the three-way connector (5) and the inlet pipe (2) and the backwash drain pipe (3) is provided with an inlet stop valve (6) and a backwash liquid discharge stop valve (7), respectively. The inlet end of the liquid inlet pipe (2) is equipped with a pre-filter unit (4); The liquid outlet / backwash inlet of multiple filter units (4) is connected to the liquid outlet / backwash inlet pipe (1).

2. The continuously operating diatomaceous earth filtration system according to claim 1, characterized in that: The filter unit (4) includes a tank (41) and an upper end cap (42) and a lower end cap (43) respectively disposed at the upper and lower ends of the tank (41); The upper end cap (42) is provided with the liquid outlet / backwash inlet, which is connected to the liquid outlet / backwash inlet pipe (1); The lower end cap (43) is provided with the liquid inlet, and a three-way connector (5) is provided at the liquid inlet of the lower end cap (43); a water distributor (19) connected to the liquid inlet is provided inside the lower end cap (43); A filter disc (44) is rotatably mounted on the upper end of the tank (41), and a filter rod (45) is provided at the liquid passage hole of the filter disc (44) located below the filter disc (44); The filter disc (44) has a rotating shaft (46) in the middle. The upper end of the rotating shaft (46) is rotatably mounted on the inner wall of the upper end cap (42), and the upper end of the rotating shaft (46) extends through the upper end cap (42) to the outside of the upper end cap (42). The top of the upper end cap (42) is provided with a swing motor (47) whose output shaft is connected to the rotating shaft (46).

3. The continuously operating diatomaceous earth filtration system according to claim 2, characterized in that: The filter rod (45) includes a support spring (451), and connectors (452) and plugs (453) respectively fixed to both ends of the support spring (451); The connector (452) is installed inside the liquid passage hole; The side of the support spring (451), connector (452) and plug (453) is provided with a filter screen (454), and the outer side of the filter screen (454) is attached with a diatomaceous earth filter membrane.

4. The continuously operating diatomaceous earth filtration system according to claim 1, characterized in that: The coating unit includes a diatomaceous earth storage tank (14), which is filled with diatomaceous earth. The top of the diatomaceous earth storage tank (14) is equipped with a diatomaceous earth conveying pipe (15) and a filtrate conveying pipe (16); The diatomaceous earth delivery pipe (15) is connected to the three-way connector (5) at the inlet of multiple filter units (4), and the filtrate delivery pipe (16) is connected to the outlet / backwash inlet pipe (1). The diatomaceous earth conveying pipe (15) and the filtrate conveying pipe (16) are respectively equipped with a diatomaceous earth conveying pump (17) and a filtrate conveying pump (18).

5. The continuously operating diatomaceous earth filtration system according to claim 1, characterized in that: The pre-filter unit (4) includes a water pump (8) and a hair filter (9); The inlet of the water pump (8) is connected to the outlet of the hair filter (9) through a connecting pipe (10), and the outlet of the water pump (8) is connected to the inlet pipe (2). The inlet of the hair filter (9) is connected to a water source; The liquid outlet / backwash inlet pipe (1) and the connecting pipe (10) are connected by a return pipe (11). A return stop valve (12) and a filter stop valve (13) are respectively provided on the return pipe (11) and the end of the connecting pipe (10) near the liquid outlet of the hair filter (9).

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