CN201386043Y - An air diffuser for biological aerated filter - Google Patents

Abstract

An air diffuser used in a sewage disposal biofilter comprises a clip, connecting rings and a flexible diaphragm with a calibrating hole, wherein the clip consists of an upper half clip and a lower half clip which are made of polypropylene, and the connecting rings and the diaphragm are made of polythene and EPDM (ethylene propylene diene monomer) rubber respectively. The diffuser has three models, and can be installed inside a supporting layer on a filter plate of the biofilter with an air outlet hole facing downward. The installation density is 25 and 50 per square meter. Three different diaphragm apertures corresponding to the three models are 1.7mm, 1.5mm and 1.2mm respectively, and the diffuser is installed on a branch pipe with the outer diameter of 25mm according to the design.

Description

An air diffuser for biological aerated filter

Technical field

The utility model relates to an air diffuser, in particular to an air diffuser used in a biological aeration filter for sewage treatment.

Background technique

At present, the known air diffusers used in biological aerated filters for sewage treatment have complex structures and are not very convenient to install. For example, the patent application number is 02262487, and the name is a single-hole membrane air diffuser disclosed in the single-hole membrane air diffuser. A cylindrical air outlet is upwardly arranged at the center of the semi-cylindrical upper pipe clamp, and the lower end of the cylindrical air outlet is The outer edge is provided with a groove for installing a single-hole rubber diaphragm. The outer side of the single-hole rubber diaphragm is designed with a protruding ring that can be embedded in the groove on the inner surface of the upper pipe clamp to prevent the diaphragm from sliding and play a sealing role. There is a single membrane hole in the middle of the perforated rubber diaphragm; there is a positioning pin on the inner side of the center of the semi-cylindrical lower tube clamp; the ring-shaped left and right fixing rings are designed with locking devices, and the fixing rings and the fixing rings are respectively set and twisted After a certain angle, it is locked on the two ends of the upper pipe clamp and the lower pipe clamp which are cylindrically clamped on the air supply pipeline. It is mainly used in the biological aerated filter of the sewage treatment process to provide the oxygen required by the microorganisms growing on the filter material. The patent application number is 93234405, and the name is disclosed in the air diffuser that is used for sewage treatment and a kind of air diffuser that is used for sewage treatment, is made of air guide pipe, rubber disc, movable pallet, disc body and fixed ring. During aeration, the air blown from between the disc body and the movable supporting plate is a jet flow that rotates and rises. Due to the shearing effect and turbulent flow effect caused by the swirling flow, the size of the bubbles becomes smaller and the liquid film renewal is faster. Fast; at the same time, the air also escapes from the gap between the rubber disc and the movable support plate during aeration, which can provide finer air bubbles with higher oxygen conversion efficiency. This kind of air diffuser used for sewage treatment is composed of basin shell, rubber plate, screw rod and nut. The air guide tube is a tube with a closed top. Hold a fixed ring, and the rubber disc is tightly clamped between the air duct cap and the fixed ring; two rows of air guide holes are evenly distributed on the side wall of the air duct at the lower part of the fixed ring, and the diameter of the lower row of holes is larger than that of the upper row of holes. There is a movable supporting plate between the two rows of air guide holes, which divides the air chamber into upper and lower air chambers. The force bearing area of the lower air chamber is larger than that of the upper air chamber; Connection; the rubber disc is a bell jar with a round hole in the center, and there is a flange on the outer edge of the bell jar; the movable supporting plate is a disc, which is set on the air duct; there are two protrusions with different diameters on the disc Ring, there is a groove between the two rings that just fits the outer edge of the rubber disc and its flange, the outer edge of the movable pallet falls on the outer edge of the disc body; there are positioning screws, Hexagon, the bottom also has threads to be connected with the air supply pipe. The patent application number is 87107373, discloses a kind of air processor in the air diffuser of the waste water treatment storage pond by name, claims: the air diffuser of the waste water treatment storage pond, comprises the diffuser of a cylinder, and its inside has a helicoid. There is a bubbler and a distributor at its bottom and top respectively. Preferably, a second bubbler is provided around the sparger at the top. Each bubbler consists of a hopper with a large bottom surface provided with fins projecting radially from its periphery. The distributor comprises a frusto-conical portion having a small base formed by conical elements with holes in the sides of the conical elements and the hopper.

Contents of the invention

In order to overcome the disadvantages and deficiencies of the existing air diffuser in the sewage treatment biological filter, such as easy blockage, inability to wash with water, uneven head loss, cumbersome installation, corrosion, etc., the utility model provides an air diffuser, This is a large and medium-sized bubble aeration head with an elastic diaphragm and a plastic jacket. It is specially designed for biological filters.

The technical solution adopted by the utility model to solve its technical problems is: this air filter is made up of two clips, two badly connected flexible diaphragms with calibration holes. The clip is divided into upper and lower half clips, and the material is polypropylene; the connecting ring is polyethylene, and the diaphragm is EPDM rubber. The filter is divided into three types, which are installed in the supporting layer of the filter plate of the biological filter, and the installation density is 25 and 50 per square meter. The air outlet is installed downwards, and the three types correspond to three different membranes. The hole diameter of the sheet is 1.7mm, 1.5mm, and 1.2mm. And it is designed to be installed on a branch pipe with an outer diameter of 25mm.

The beneficial effect of the utility model is that the high-efficiency aeration equipment enables the aerated biological filter to be successfully applied, is not easy to be blocked, is easy to clean, has a long service life, and is easy to install.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Figure 1 is the general assembly diagram of the air filter.

In the figure 1. The lower half of the clip, 2. The diaphragm, 3. The upper half of the clip, 4. The connecting ring.

Detailed ways

In Figure 1, install the upper half of the clip (3) on the outer side of the upper part of the DN25mm air pipe and fix it with the hole on the top of the air pipe to fix the upper half of the clip, and then put the perforated diaphragm (2) into the lower half into the first clip (1), and put the lower half of the clip (1) together

After matching with the air outlet at the bottom of the air pipe, it is docked with the upper half of the clip (1), and then the two ends of the clip are covered with two connecting rings (4), so that the upper and lower clips are clamped and fixed to each other. The installation density is 25 and 50 per square meter, and the air outlet is installed downwards. This air filter has uniform air distribution, because the membrane is selected according to its gas flow rate; elastic membrane, not easy to clog, can be washed with water; head loss increases evenly; easy and reliable installation; no corrosion.

Claims (3)

1. the air diffuser of a BAF comprises clip, shack, and diaphragm is characterized in that: being divided into three types and corresponding respectively to three kinds of different iris apertures is 1.7mm, 1.5mm and 1.2mm. also are designed to be installed on the arm of external diameter 25mm.

2. the air diffuser of BAF according to claim 1, it is characterized in that: the material of clip is a polypropylene, and shack is a polyethylene, and diaphragm is a terpolymer EP rubber.

3. the air diffuser of BAF according to claim 1 is characterized in that: diaphragm is the flexible membrane of band correction hole.

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