Biological filter for sewage treatment

Abstract

The utility model discloses a biological filter tank for sewage treatment. The biological filter tank comprises a tank body, a back-flushing inflation cavity, a water distributor, a first filler layer, a second filler layer, a third filler layer, a bottom support screen plate, a cylinder assembly, a sediment suction and discharge pipe, a communicating pipe, a back-flushing water inlet, a water outlet, a rubber hose, a high-pressure air pump and an ultrafiltration core pipe. The filter structure is reasonable in structural design, the rubber hose is arranged between every two adjacent filler layers and is in a reciprocating inflation contraction state, and under the action of high-pressure gas in the back-flushing inflation cavity, back-flushing cleaning is carried out on the filter structure, filter sediments are loosened and removed, and the filter structure is convenient to clean. The problem that filtration is affected due to the fact that sediments between the filler layers are hardened and blocked is solved, meanwhile, high-pressure backwash water is introduced into the tank body through the backwash water inlet, the backwash effect is greatly enhanced, and the biological filtration efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of sewage treatment, in particular to a biological filter for sewage treatment. Background Art

[0002] The denitrifying biofilter is a biofilter with denitrification and denitrification functions, which is developed on the basis of the traditional biofilter. It is widely used in deep denitrification of sewage treatment due to its good denitrification and denitrification capacity, small footprint, high treatment efficiency, and low engineering investment costs.

[0003] In the existing biological filter tank for sewage treatment, the filter structure layers are too close together, making it difficult to clean the sediment, and the single backwash structure is not effective enough, which is not conducive to improving the biological filtration efficiency. Therefore, a biological filter tank for sewage treatment is proposed to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a biological filter for sewage treatment in order to solve the above problems.

[0005] The utility model achieves the above-mentioned purpose through the following technical scheme: a biological filter tank for sewage treatment, including a tank body, a bottom support mesh plate is installed in the middle of the tank body, and a cylinder assembly is installed at the lower end of the middle of the tank body, the bottom support mesh plate is sequentially provided with packing layers, and a rubber hose is distributed between each two adjacent packing layers, the outer end of the rubber hose is connected to the corresponding output port of the high-pressure air pump located on the tank body, and the other corresponding output port of the high-pressure air pump is connected to the inside of the recoil inflation chamber through the pipe body, an ultrafiltration core tube is installed in each cylinder in the cylinder assembly, and the outer end of the ultrafiltration core tube is connected to the connecting pipe located at the bottom of the tank body, and a water distributor is distributed at the tank mouth of the tank body.

[0006] Preferably, the packing layer includes a first packing layer, a second packing layer and a third packing layer.

[0007] Preferably, the recoil inflation chamber is formed by the cylinder assembly, the bottom support mesh plate and the interior of the pool body.

[0008] Preferably, the bottom end of each cylinder in the cylinder assembly is connected to a sediment suction and discharge pipe distributed in the tank body through a pipe body.

[0009] Preferably, both ends of the connecting pipe, the outer end of the sediment suction and discharge pipe and the outer end of the rubber hose are all installed with electric control valves.

[0010] Preferably, one end of the connecting pipe is set as a backwash water inlet, and the other end of the connecting pipe is set as a water outlet.

[0011] Compared with the prior art, the utility model has the advantages of: by arranging a rubber hose between two adjacent packing layers and putting it in a reciprocating inflation and contraction state, and combining the action of the high-pressure gas inside the backwash inflation chamber, the filter structure can be backwashed and cleaned, the filtered sediments can be loosened and removed, and the problem of sediment compaction and blockage between the packing layers affecting the filtration can be solved. At the same time, high-pressure backwash water is introduced into the pool body by utilizing the backwash water inlet, which greatly enhances the backwash effect and improves the biological filtration efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 It is an enlarged view of the overall local structure of the utility model.

[0015] In the figure: 1. pool body; 101. backwashing air chamber; 2. water distributor; 3. first packing layer; 4. second packing layer; 5. third packing layer; 6. bottom support mesh plate; 7. cylinder assembly; 8. sediment suction and discharge pipe; 9. connecting pipe; 901. backwashing water inlet; 902. water outlet; 10. rubber hose; 11. high-pressure air pump; 12. ultrafiltration core tube. DETAILED DESCRIPTION

[0016] In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the embodiment described below is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of 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.

[0017] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0018] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0019] See also Figure 1-2 As shown, a biological filter for sewage treatment includes a tank body 1, a bottom support mesh plate 6 is installed in the middle of the tank body 1, and a cylinder assembly 7 is installed at the lower end of the middle of the tank body 1, packing layers are arranged in sequence on the bottom support mesh plate 6, and a rubber hose 10 is distributed between each two adjacent packing layers, the outer end of the rubber hose 10 is connected to the corresponding output port of the high-pressure air pump 11 located on the tank body 1, and the other corresponding output port of the high-pressure air pump 11 is connected to the inside of the recoil inflation chamber 101 through the tube body, an ultrafiltration core tube 12 is installed in each cylinder in the cylinder assembly 7, and the outer end of the ultrafiltration core tube 12 is connected to the connecting pipe 9 located at the bottom of the tank body 1, and a water distributor 2 is distributed at the tank mouth of the tank body 1.

[0020] The packing layer comprises a first packing layer 3, a second packing layer 4 and a third packing layer 5, which helps to form a gradual filtering structure.

[0021] The recoil inflation chamber 101 is formed by the cylinder assembly 7, the bottom support mesh plate 6 and the interior of the pool body 1 so as to utilize air pressure penetration for recoil.

[0022] The bottom end of each cylinder in the cylinder assembly 7 is connected to the sediment suction and discharge pipe 8 distributed in the tank body 1 through a pipe body, so as to facilitate the connection of an external sewage pump for sewage cleaning.

[0023] Both ends of the connecting pipe 9, the outer end of the sediment suction and discharge pipe 8 and the outer end of the rubber hose 10 are equipped with electric control valves to achieve the effect of controlling the opening and closing.

[0024] Furthermore, one end of the connecting pipe 9 is set as a backwash water inlet 901, and the other end of the connecting pipe 9 is set as a water outlet 902.

[0025] Compared with the prior art, under the action of the high-pressure air pump 11 to inflate the inside of the recoil inflation chamber 101 and the rubber hose 10 through the corresponding electric control valve, by arranging the rubber hose 10 between two adjacent packing layers and putting it in a reciprocating inflation and contraction state, and combined with the action of the high-pressure gas inside the recoil inflation chamber 101, the filter structure is backwashed and cleaned, the filtered sediments are loosened and removed, and the problem of sediment compaction and blockage between the packing layers that affects the filtration is solved. At the same time, high-pressure backwash water is introduced into the pool body 1 through the backwash water inlet 901, which greatly enhances the backwash effect and improves the biological filtration efficiency.

[0026] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-limiting from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0027] As described above, the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A biological filter for sewage treatment, comprising a tank body (1), characterized in that: A bottom support mesh plate (6) is installed in the middle of the pool body (1), and a cylinder assembly (7) is installed at the lower end of the middle of the pool body (1). Filling layers are arranged in sequence on the bottom support mesh plate (6), and a rubber hose (10) is distributed between each two adjacent filling layers. The outer end of the rubber hose (10) is connected to a corresponding output port of a high-pressure air pump (11) located on the pool body (1), and another corresponding output port of the high-pressure air pump (11) is connected to the inside of the recoil charging chamber (101) through a pipe body. An ultrafiltration core tube (12) is installed in each cylinder in the cylinder assembly (7), and the outer end of the ultrafiltration core tube (12) is connected to a connecting pipe (9) located at the bottom of the pool body (1). A water distributor (2) is distributed at the pool mouth of the pool body (1).

2. A biological filter for sewage treatment according to claim 1, characterized in that: The packing layer comprises a first packing layer (3), a second packing layer (4) and a third packing layer (5).

3. A biological filter for sewage treatment according to claim 1, characterized in that: The recoil inflation chamber (101) is formed by the cylinder assembly (7), the bottom support mesh plate (6) and the interior of the pool body (1).

4. A biological filter for sewage treatment according to claim 1, characterized in that: The bottom end of each cylinder in the cylinder assembly (7) is connected to a sediment suction and discharge pipe (8) distributed in the tank body (1) through a pipe body.

5. A biological filter for sewage treatment according to claim 1, characterized in that: Both ends of the connecting pipe (9), the outer end of the sediment suction and discharge pipe (8) and the outer end of the rubber hose (10) are all equipped with electric control valves.

6. A biological filter for sewage treatment according to claim 1, characterized in that: One end of the connecting pipe (9) is configured as a backwash water inlet (901), and the other end of the connecting pipe (9) is configured as a water outlet (902).

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