Filter purging device

Abstract

The utility model discloses a filter tank purging device which comprises a filter tank body, an upper filter material and a lower filter material are arranged in the filter tank body, and the lower part of the filter tank body is respectively provided with an air inlet and a water inlet; the upper part gas washing mechanism is used for separating the upper part filter material from the lower part filter material, and is arranged between the upper part filter material and the lower part filter material, the filter tank purging device disclosed by the utility model improves the phenomenon of non-uniform backwashing in the prior art through layered backwashing, can effectively prevent the mixing of the upper part filter material and the lower part filter material, and improves the backwashing efficiency. The pollution of the filter material at the lower part is prevented from being aggravated, and the water consumption is 50-80% of the traditional water consumption, so that the water resource is saved, and a certain popularization value is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a filter tank purge device. Background Art

[0002] During the operation of the filter, the impurities removed from the influent water accumulate on the surface of the filter material and in the pores between the particles. As the filter continues to operate, the impurities stored in the filter bed will cause the porosity of the filter bed to decrease, and the amount of impurities that the filter bed can retain will continue to decrease. When the head loss increases to the head required for the water flow to pass through at the predetermined flow rate, that is, the maximum allowable head loss, or when the suspended matter penetrates and finally causes the water quality of the filtered water to deteriorate, the filter will eventually stop operating. At this time, the filter needs to be backwashed to remove the retained impurities and restore the filter's operating capacity.

[0003] Traditional filter backwashing usually increases the backwash water volume and backwash water pressure in order to achieve a rapid backwashing effect, which results in a large amount of backwash water waste and is prone to uneven backwashing. The cleanliness of the backwash cannot be effectively guaranteed. Utility Model Content

[0004] The purpose of the utility model is to overcome the defects of the prior art and provide a filter tank purge device, which improves the uneven backwashing phenomenon of traditional backwashing. The filter material backwash cleanliness is cleaner than traditional backwashing, and at the same time effectively prevents the mixing of upper filter material and lower filter material, thereby avoiding aggravating the pollution of the lower filter material.

[0005] In order to achieve the above technical effects, the utility model provides a filter tank purge device, which includes:

[0006] The filter tank body is provided with an upper filter material and a lower filter material, and the lower part of the filter tank body is provided with an air inlet and a water inlet respectively;

[0007] An upper air washing mechanism is used to separate the upper filter material from the lower filter material, and the upper air washing mechanism is arranged between the upper filter material and the lower filter material.

[0008] Preferably, a reserved space is formed in the filter tank body below the lower filter material, the air inlet and the water inlet are both located on the side walls of the reserved space, and the water inlet is located below the air inlet.

[0009] Preferably, a plurality of long-handled filter caps are evenly arranged at the bottom of the lower filter material, and the first ends of the plurality of long-handled filter caps are fixedly connected to the bottom of the lower filter material, and the second ends thereof extend to the reserved space.

[0010] Preferably, the upper air washing mechanism includes an air washing main pipe and two air washing branch pipes connected to the air washing main pipe and respectively located on both sides of the air washing main pipe, the air washing main pipe and the two air washing branch pipes are respectively arranged parallel to the upper filter material, and a plurality of air brush nozzles are respectively evenly and spaced apart from each other installed on the air washing main pipe and the air washing branch pipes.

[0011] Preferably, the installation height of the air brush nozzle is 30 cm to 40 cm below the top of the upper filter material.

[0012] Due to the adoption of the above technical solution, the technical effects achieved by the utility model are:

[0013] 1) The filter material backwashing cleanliness is cleaner than traditional backwashing;

[0014] 2) By adopting layered backwashing, the mixing of the upper filter material and the lower filter material can be effectively prevented, thereby avoiding aggravating the pollution of the lower filter material;

[0015] 3) Save water usage, the backwash water volume only needs 50% to 80% of the traditional water volume;

[0016] 4) Improved the uneven backwashing phenomenon of traditional backwashing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a side cross-sectional view of the filter tank purge device according to an embodiment of the utility model.

[0019] Figure 2 It is a top sectional view of the upper air washing mechanism in the embodiment of the utility model.

[0020] The corresponding relationship of the numbers in the accompanying drawings is as follows:

[0021] 1-filter tank body; 2-upper filter material; 3-lower filter material; 4-upper air washing mechanism; 41-air washing main pipeline; 42-air washing branch pipeline; 43-air brush nozzle; 5-long handle filter cap; 6-air inlet; 7-water inlet; 8-reserved space. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1 and Figure 2 As shown, an embodiment of the utility model provides a filter bed purging device, including a filter bed body 1, wherein an upper filter material 2 and a lower filter material 3 are arranged inside the filter bed body 1, an air inlet 6 and a water inlet 7 are respectively arranged at the lower part of the filter bed body 1, an upper air washing mechanism 4 for separating the upper filter material 2 and the lower filter material 3 is arranged inside the filter bed body 1, and the upper air washing mechanism 4 is located between the upper filter material 2 and the lower filter material 3, the air inlet 6 is used to convey high-pressure air into the filter bed body 1, and the water inlet 7 is used to convey high-pressure backwash water into the filter bed body 1, and the filter materials rub against each other under the joint action of the high-pressure backwash water and the high-pressure air, so as to clean the impurities, and due to the joint action of the high-pressure water and the high-pressure air, the amount of backwash water used is greatly reduced, and rapid backwashing can be achieved under the condition of using very little backwash water, and the water consumption is 50% to 80% of the traditional backwash water consumption.

[0024] Furthermore, a reserved space 8 is formed below the lower filter material 3 in the filter tank body 1, and the air inlet 6 and the water inlet 8 are both located on the side wall of the filter tank body 1 corresponding to the reserved space 8, and the water inlet 8 is located below the air inlet 6. Preferably, in this embodiment, a plurality of long-handled filter caps 5 are evenly arranged at the bottom of the lower filter material 2, and the first ends of the plurality of long-handled filter caps 5 are all fixedly connected to the bottom of the lower filter material 2, and the second ends of the plurality of long-handled filter caps 5 are all extended to the reserved space 8.

[0025] Furthermore, the upper air washing mechanism 4 is used to blow air to the upper surface of the upper filter material 2. The upper air washing mechanism 4 includes an air washing main pipeline 41 and two air washing branch pipelines 42 connected to the air washing main pipeline 41 and respectively located on both sides of the air washing main pipeline 41. The air washing main pipeline 41 and the two air washing branch pipelines 42 are respectively arranged parallel to the upper filter material 2. A plurality of air brush nozzles 43 are respectively evenly and spaced apart on the air washing main pipeline 41 and the air washing branch pipelines 42. High-pressure air enters the air washing main pipeline 41 and each air washing branch pipeline 42 through the air inlet 6, and is finally ejected through each air brush nozzle 43 on the air washing branch pipeline 42. It should be noted that in this embodiment, the installation height of the air brush nozzle 43 is 30 cm to 40 cm below the top of the upper filter material 2. By adopting the filter tank purge device of the utility model, when in use, the upper part is backwashed first and then the whole is backwashed. It is also possible to choose whether to perform the whole backwash according to actual needs. The layered backwashing improves the uneven backwashing phenomenon of traditional backwashing. At the same time, it can effectively prevent the mixing of the upper filter material and the lower filter material, avoid aggravating the pollution of the lower filter material, reduce the amount of backwash water, and save water resources.

[0026] Parts not involved in the present invention are the same as the prior art or can be implemented by the prior art. Although the embodiments of the present invention have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A filter tank purge device, characterized in that: include: The filter tank body has an upper filter material and a lower filter material therein, and the lower part of the filter tank body is respectively provided with an air inlet and a water inlet; An upper air washing mechanism is used to separate the upper filter material from the lower filter material, and the upper air washing mechanism is arranged between the upper filter material and the lower filter material.

2. The filter tank purge device according to claim 1, characterized in that: A reserved space is formed in the filter tank body below the lower filter material, the air inlet and the water inlet are both located on the side walls of the reserved space, and the water inlet is arranged below the air inlet.

3. The filter tank purge device according to claim 2, characterized in that: A plurality of long-handled filter caps are evenly arranged at the bottom of the lower filter material, and the first ends of the plurality of long-handled filter caps are fixedly connected to the bottom of the lower filter material, and the second ends thereof extend to the reserved space.

4. The filter tank purge device according to claim 1, characterized in that: The upper air washing mechanism includes an air washing main pipeline and two air washing branch pipelines connected to the air washing main pipeline and respectively located on both sides of the air washing main pipeline. The air washing main pipeline and the two air washing branch pipelines are respectively arranged parallel to the upper filter material. A plurality of air brush nozzles are respectively evenly and spaced apart from each other installed on the air washing main pipeline and the air washing branch pipelines.

5. The filter tank purge device according to claim 4, characterized in that: The installation height of the air brush nozzle is 30 cm to 40 cm below the top of the upper filter material.

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