Sand filter pool with sand leakage prevention function

Abstract

The utility model relates to a sand filter pool with sand leakage prevention function, relates to water treatment equipment technical field, including sand filter pool, the inside of sand filter pool is equipped with filter pool and backwashing drainage groove respectively, filter pool is equipped with two, two filter pools are correspondingly arranged at the left side and right side of backwashing drainage groove, the water inlet pipe is fixed on sand filter pool, and the water outlet of water inlet pipe is arranged above filter pool, the sand filter pool with sand leakage prevention function can effectively intercept the filter material carried in backwashing water flow, greatly reduces the loss of filter material, guarantees the thickness and filtering precision of filter material layer, is favorable to the stable water quality, after reducing the loss of filter material, the filtering period is prolonged, and backwashing frequency is reduced, reduces the water consumption of backwashing, reduces the workload of manual filter material supplement simultaneously, improves the operation efficiency of sand filter pool, reduces the loss of filter material, significantly reduces the supplement cost of filter material, saves the expenditure for water purification plant.

Description

Technical Field

[0001] This utility model relates to the field of water treatment equipment technology, and in particular to a sand filter tank with anti-sand leakage function. Background Technology

[0002] Sand filters are key facilities in the drinking water treatment process of water purification plants. They use the interception effect of filter media (mainly quartz sand) to remove fine suspended impurities, colloids and other pollutants from the source water. They have the advantages of fast filtration speed, stable filtration effect and low operating cost, and are widely used in municipal water supply and industrial water treatment.

[0003] During the operation of a sand filter, when the filter media reaches saturation, backwashing is necessary to remove contaminants and restore its filtration capacity. However, existing sand filters have a significant drawback in the backwashing process: improper control of water or air flushing intensity can easily lead to excessive expansion of the filter media, causing fine particles to be discharged from the filter through the drainage weir with the backwash water flow. This problem can lead to a series of consequences:

[0004] 1. As the filter media layer gradually thins, the filtration accuracy decreases, making it difficult for the turbidity of the treated water to consistently meet standards, thus affecting drinking water safety.

[0005] Second, filter media loss leads to a shorter filtration cycle and an increased backwashing frequency, which not only increases the backwashing water consumption but also reduces the operating efficiency of the water purification plant.

[0006] Third, the cost of replenishing filter media is high. For example, a water purification plant with a treatment capacity of 100,000 tons / day can require more than 20 tons of sand to be replenished every year. Utility Model Content

[0007] The technical problem this invention aims to solve is to overcome existing defects and provide a sand filter with anti-sand leakage function. This sand filter effectively intercepts filter media carried in the backwash water flow, greatly reducing media loss, ensuring the thickness and filtration accuracy of the filter media layer, facilitating stable effluent quality, extending the filtration cycle, reducing backwashing frequency, decreasing backwash water consumption, and reducing the workload of manual media replenishment. This improves the operating efficiency of the sand filter, significantly reduces media replenishment costs, and saves expenses for water purification plants, effectively solving the problems in the background technology.

[0008] To achieve the aforementioned objective, this utility model adopts the following technical solution:

[0009] A sand filter with anti-sand leakage function includes a sand filter, with a filter tank and a backwash drainage trough respectively provided on the inner side of the sand filter. There are two filter tanks, which are respectively arranged on the left and right sides of the backwash drainage trough. An inlet pipe is fixed on the sand filter, and the drain outlet of the inlet pipe is located above the filter tank. A filter assembly is installed at the opening of the backwash drainage trough. A drain pipe is fixed on the side of the sand filter and communicates with the inside of the backwash drainage trough. A control switch is installed on the side of the sand filter and is electrically connected to an external power source.

[0010] Furthermore, the filtration assembly includes a filter belt, a servo motor, and two conveyor rollers. The ends of both conveyor rollers are rotatably connected to the sand filter tank, and one of the conveyor rollers is installed in the groove of the backwash drainage tank. The two conveyor rollers are connected by a filter belt. The servo motor is installed on the side of the sand filter tank, and the output shaft of the servo motor is fixedly connected to the end of one of the conveyor rollers. The servo motor is electrically connected to a control switch.

[0011] Furthermore, the mesh size of the filter belt is 18 meshes.

[0012] Furthermore, it also includes a cleaning brush, the end of which is fixedly connected to the sand filter tank, and the bristles of the cleaning brush are arranged in contact with the filter belt.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This sand filter with anti-sand leakage function has the following advantages: By filtering backwash water through the filter components, it can effectively intercept the filter media carried in the backwash water flow, greatly reducing the loss of filter media, ensuring the thickness and filtration accuracy of the filter media layer, which is conducive to stabilizing the quality of effluent. After reducing the loss of filter media, the filtration cycle is extended, the backwash frequency is reduced, the backwash water consumption is reduced, and the workload of manually replenishing filter media is reduced, which improves the operating efficiency of the sand filter. The reduction of filter media loss significantly reduces the cost of replenishing filter media and saves expenses for water purification plants. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a three-dimensional side view of the present invention;

[0016] Figure 3 This is a three-dimensional cross-sectional structural diagram of the present invention.

[0017] In the diagram: 1-sand filter, 2-cleaning brush, 3-filter assembly, 31-filter belt, 32-servo motor, 33-transfer roller, 4-drain pipe, 5-control switch, 6-inlet pipe, 7-filter sand layer, 8-backwash drainage trough, 9-filter tank. Detailed Implementation

[0018] The present invention will be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention.

[0019] Please see Figure 1-3 This embodiment provides a technical solution: a sand filter with anti-sand leakage function, including a sand filter 1, with a filter pool 9 and a backwash drainage trough 8 respectively provided on the inner side of the sand filter 1. There are two filter pools 9, which are respectively arranged on the left and right sides of the backwash drainage trough 8. An inlet pipe 6 is fixed on the sand filter 1, and the drain outlet of the inlet pipe 6 is located above the filter pool 9. A filter assembly 3 is installed at the trough opening of the backwash drainage trough 8. A drain pipe 4 is fixed on the side of the sand filter 1, and the drain pipe 4 is connected to the inside of the backwash drainage trough 8. A control switch 5 is installed on the side of the sand filter 1, and the control switch 5 is electrically connected to an external power source.

[0020] The filter assembly 3 includes a filter belt 31, a servo motor 32, and conveyor rollers 33. Two conveyor rollers 33 are provided, both ends of which are rotatably connected to the sand filter tank 1. One of the conveyor rollers 33 is installed in the mounting slot of the backwash drainage trough 8. The two conveyor rollers 33 are connected by the filter belt 31. The servo motor 32 is installed on the side of the sand filter tank 1, and its output shaft is fixedly connected to the end of one of the conveyor rollers 33. The servo motor 32 is electrically connected to the control switch 5. The filter belt 31 has a mesh size of 18. When backwashing is required, the backwashing equipment is activated, and the backwash water flows through the sand layer of the filter tank. 7. The backwashing process generates wastewater and any filter media it may carry through the filter screen belt 31. After filtration, the wastewater enters the backwash drainage tank 8. The water in the backwash drainage tank 8 is discharged to the outside through the drain pipe 4. This process effectively intercepts the filter media carried in the backwash water flow, greatly reducing the loss of filter media, ensuring the thickness and filtration accuracy of the filter media layer, and facilitating stable effluent quality. Reducing filter media loss extends the filtration cycle, lowers the backwashing frequency, reduces backwash water consumption, and decreases the workload of manually replenishing filter media. This improves the operating efficiency of the sand filter, reduces filter media loss, significantly lowers the cost of replenishing filter media, and saves expenses for the water purification plant.

[0021] It also includes a cleaning brush 2, the end of which is fixedly connected to the sand filter tank 1. The bristles of the cleaning brush 2 are in contact with the filter belt 31. When the filter belt 31 needs to be cleaned, the servo motor 32 is started by the control switch 5. The output shaft of the servo motor 32 drives the conveyor roller 33 to rotate, so that the filter belt 31 is driven. During the transmission of the filter belt 31, the cleaning brush 2 cleans off the filter material and impurities on its surface. It is convenient to clean and avoids the trouble of manual cleaning, saving time and effort.

[0022] The working principle of the sand filter with anti-sand leakage function provided by this utility model is as follows: the water to be filtered is transported to the top of the filter tank 9 through the water inlet pipe 6 and enters the filter tank 9. After being filtered by the sand layer 7 of the filter tank, the impurities in the water are intercepted and the filtered water is discharged from the bottom of the filter tank 9.

[0023] When backwashing is required, the backwashing equipment is activated. High-pressure gas and water are used to flush the sand layer 7 from below. Fine impurities clogging the sand layer 7 are flushed to the top and flow with the water through the filter belt into the backwash drainage tank. In addition to fine impurities, the backwash water also contains some sand with a particle size of about 12 mesh, which is larger than the 18 mesh size of the filter belt. The water entering the sand filter has already been treated in the flocculation tank and sedimentation tank, and some larger impurities have been removed, so it enters the sand filter... The impurities in the water in the pool are very small, with a particle size of basically micrometers. Therefore, when the backwash water flows through the filter belt, the sand is blocked, and the impurities pass through the filter belt and enter the backwash drain tank. The water in the backwash drain tank 8 is discharged to the outside through the drain pipe 4. When it is necessary to clean the filter belt 31, the servo motor 32 is started by the control switch 5. The output shaft of the servo motor 32 drives the conveyor roller 33 to rotate, so that the filter belt 31 is driven. During the transmission of the filter belt 31, the cleaning brush 2 cleans the filter media sand off its surface.

[0024] It is worth noting that the components disclosed in the above embodiments are all general standard parts or parts known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods. The servo motor 32 and the control switch 5 are products currently on the market, and their structures and principles are known technologies. This solution only describes their role in this solution and the technical effects they are intended to produce.

[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances. For example, a rotary connection can refer to a rotary connection through a bearing.

[0026] The parts of this utility model not described in detail are prior art. Although this utility model has been specifically shown and introduced in conjunction with preferred embodiments, there are many methods and approaches to implement this technical solution. The above description is only a preferred embodiment of this utility model. However, those skilled in the art should understand that various changes in form and detail can be made to this utility model without departing from the spirit and scope of this utility model as defined by the appended claims, and all such changes shall be within the protection scope of this utility model.

Claims

1. A sand filter with anti-sand leakage function, comprising a sand filter (1), characterized in that: The inner side of the sand filter (1) is provided with a filter pool (9) and a backwash drainage trough (8). There are two filter pools (9), which are respectively arranged on the left and right sides of the backwash drainage trough (8). A water inlet pipe (6) is fixed on the sand filter (1). The drain outlet of the water inlet pipe (6) is located above the filter pool (9). A filter assembly (3) is installed at the slot of the backwash drainage trough (8). A drain pipe (4) is fixed on the side of the sand filter (1). The drain pipe (4) is connected to the inside of the backwash drainage trough (8). A control switch (5) is installed on the side of the sand filter (1). The control switch (5) is electrically connected to an external power source.

2. A sand filter with anti-sand leakage function according to claim 1, characterized in that: The filter assembly (3) includes a filter belt (31), a servo motor (32), and a conveyor roller (33). There are two conveyor rollers (33), and the ends of the two conveyor rollers (33) are rotatably connected to the sand filter (1). One of the conveyor rollers (33) is set in the groove of the backwash drainage tank (8). The two conveyor rollers (33) are connected by the filter belt (31). The servo motor (32) is installed on the side of the sand filter (1). The output shaft of the servo motor (32) is fixedly connected to the end of one of the conveyor rollers (33). The servo motor (32) is electrically connected to the control switch (5).

3. A sand filter with anti-sand leakage function according to claim 2, characterized in that: The filter belt (31) has 18 meshes.

4. A sand filter with anti-sand leakage function according to claim 2, characterized in that: It also includes a cleaning brush (2), the end of which is fixedly connected to the sand filter (1), and the bristles of the cleaning brush (2) are in contact with the filter belt (31).

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