CN206680249U - A kind of filter with aeration performance - Google Patents

Abstract

A kind of filter with aeration performance, including four filter rod, appendix, filter cap and retainer ring parts.An at least appendix and filter cap UNICOM wherein on filter rod, are only used for conveying gas when filter is aerated, and make the air water transfer passage of filter mutually independent, so as to which the Gas-Water Contant formed in filter cap is more stable, water and air distributing is evenly.The distribution aperture of two rows or more is uniformly provided with filter cap, and using the perforate ratio of big resistance, in the aeration of small tolerance, gas is only aerated by the part distribution aperture in filter cap, and when atm number backwashes, gas carries out distribution by distribution aperture all in filter cap.Several water distributing pores, filtered water inlet and backwash water distribution is wherein provided with the retainer ring of filter cap bottom to evenly distribute by water distributing pore realization.Water distribution and aeration aerating this kind of filter realizes backwash water and air distributing and filtering simultaneously when.

Description

A filter head with aeration function

technical field

The utility model relates to the technical field of water treatment, in particular to a filter head with the functions of uniform aeration, backwashing and uniform water distribution and gas distribution.

Background technique

Biological aerated filter is a new sewage treatment process developed in the early 1990s, with a wide range of applications. During the operation of the biological aerated filter, due to the biochemical reaction of aerobic microorganisms in the tank, the filter needs to be aerated and oxygenated. During the implementation of the project, the biological aerated filter needs to use appropriate aeration equipment to evenly distribute the air and divide it into small enough bubbles to facilitate the absorption of microorganisms. At the same time, in addition to the conventional biochemical treatment of sewage, the biological aerated filter also physically filters the pollutants in the sewage. Therefore, the biological aerated filter is the same as the ordinary filter. During the operation, impurities such as inorganic particles or organic sludge Continuously accumulate in the filter material layer. After these impurities accumulate to a certain extent, the filter material must be washed with clean water. This kind of cleaning is combined with air and water. distribution, in order to ensure that all filter media can be fully cleaned.

At present, most of the aeration and oxygenation of biological aerated filters adopt perforated tubes or single-hole membrane aerators. The advantage of the perforated tube is that it is simple in structure and not easy to block. It is determined that the oxygen utilization rate is low, and the aeration volume needs to be increased during operation to meet the oxygen demand of biological treatment, thereby increasing the operating cost and construction cost. The single-hole membrane aerator has the advantages of uniform aeration distribution and high oxygen utilization rate, but the disadvantage is that the diaphragm is easily damaged by the extrusion of the supporting layer, which makes the aeration distribution effect worse. In addition to the above-mentioned aeration scheme, there is also a biological aerated filter that only needs to install a set of filter heads to simultaneously realize the functions of filtering influent water, aeration and oxygenation, and water and gas distribution during backwashing, thus saving special equipment. Aeration and oxygenation equipment. However, because the diameter of the pores of the current filter head and filter cap is generally designed according to the large volume of backwashing air distribution requirements, during aeration and oxygenation, the air bubbles generated through the pores are too large, the gas distribution is uneven, and the oxygen transfer efficiency is low. ; In addition, the current filter head also has problems such as large disturbance of the air and water layer in the filter cap, which leads to uneven water distribution and gas distribution.

To sum up, in the application of biological aerated filter, a set of equipment that can realize uniform aeration, backwash and uniform water distribution and gas distribution is needed.

Contents of the invention

The purpose of this utility model is to solve the problem that the aeration equipment used in the existing biological aerated filter can not meet the effect of filtering aeration, oxygenation and backwashing gas and water distribution at the same time, and to provide a kind of aeration equipment used in the biological aerated filter, at the same time Filter head with functions of aeration, water distribution and backwash water distribution and air distribution. This kind of filter head can evenly distribute the backwash air and backwash water, and can also achieve uniform aeration and high oxygen transfer efficiency, so that the biological aerated filter maintains a high treatment efficiency and a low operating cost. power. At the same time, the unique air-water delivery method and the reasonable opening method of water and air distribution can realize uniform water and air distribution when the aeration volume changes in a wide range.

The utility model relates to a filter head with aeration function, which includes a filter rod, an air delivery pipe, a filter cap and a fixed ring, wherein at least one air delivery pipe is connected with the filter cap on the filter rod, and the bottom end of the air delivery pipe is located at the filter rod The appropriate position in the middle of the filter rod; there are several water inlet slits or water inlet holes at the appropriate position of the lower part of the filter rod, two or more rows of air holes are uniformly opened on the filter cap, and several water distribution holes are opened on the fixed ring. hole, and the fixing ring is fixed under the filter cap by the thread on the filter rod.

In the above-mentioned filter head with aeration function, the air delivery pipe extends into the filter cap to a certain height, the air outlet is located at the top of the air delivery pipe, and the air inlet is located at the bottom of the air delivery pipe. The air in the air-water distribution chamber of the filter enters the filter cap through the air pipe for one-time air distribution, forming a stable air-water layer in the filter cap.

Further, the air delivery pipe can be arranged inside or outside the filter rod, and the air delivery pipe arranged inside the filter rod has at least one air passage through the wall of the filter rod to communicate the external air with the air inlet of the air delivery pipe. Further, the air outlet can be several air outlet holes or several air outlet seals on the top of the air pipe, or other types of air distribution structures.

Further, two or more rows of evenly arranged small air distribution holes are opened at a suitable position on the upper part of the filter cap.

Further, the fixing ring has several evenly arranged water distribution holes.

In the above-mentioned filter head with aeration function, two or more rows of evenly arranged air distribution holes are opened at the appropriate position on the upper part of the filter cap, and the air entering the filter cap through the water delivery pipe passes through the air distribution holes for secondary Gas distribution; when the filter is backwashed with gas, due to the large amount of backwashing gas, the air-water layer formed in the filter head is low, and all the small holes of the gas distribution can play the role of backwashing and gas distribution; when the filter is normal When filtering and aerating, due to the small amount of aeration gas, the air-water layer formed in the filter head is relatively high, so only some of the small air distribution holes on the upper part of the filter cap play the role of aeration and gas distribution.

In the above-mentioned filter head with aeration function, when the filter is backwashed to distribute water, the water in the air-water distribution chamber of the filter enters the filter rod through the vertical water inlet slot at the bottom of the filter rod and then reaches the filter cap, and then is fixed The water distribution hole on the ring is used for backwashing water distribution.

Compared with other common filter heads with aeration function, the filter head with aeration function of the present invention has the following advantages:

(1) Air and water are transported by separate pipelines, and the air and water transport is more stable. The filter head of the present invention is provided with an air delivery pipe inside the water delivery pipe. When aerating, the aeration air enters the air delivery pipe, and the water to be treated enters the filter rod through the vertical water inlet slit, and the aeration air and the water to be treated pass through a separate Pipeline transportation, compared with ordinary filter heads, the water to be treated and aeration air do not contact each other during the transportation process, which can reduce the disturbance of the air-water interface in the filter cap and ensure stable water and air transportation.

(2) On the filter cap of the filter head of the present invention, two or more rows of air distribution holes are opened, and the pore diameter is according to the large resistance opening ratio. When aerating with a small amount of air, only part of the air distribution holes are used for aeration, which can achieve higher High aeration and oxygenation rate and evenly distributed tiny air bubbles. In addition, when the aeration rate changes in a large range, it can also achieve uniform water and air distribution, and the adjustment range of the water and air distribution of the filter head is wide.

Description of drawings

Fig. 1 is the sectional view of filter head of the present invention;

Fig. 2 is the outline drawing of filter head of the present invention;

The parts in the drawings are: filter rod 1, air pipe 2 inside the filter rod 1, filter cap 3 and fixing ring 4 on the upper part of the filter rod; the upper part of the filter rod 1 has thread 1-1, and the lower part has a vertical water inlet slit 1-2; the upper part of the air pipe 2 has an air outlet 2-1, and the lower end has an air channel 2-2 to communicate the air pipe with the outside air; the filter cap 3 has two rows of evenly arranged air distribution holes 3- 1; wherein the fixing ring 4 is evenly opened with several water distribution holes 4-1.

detailed description

Below is the specific embodiment of the present invention in conjunction with accompanying drawing, and the technical scheme of the present invention is described further, but the present invention is not limited to following embodiment.

Referring to Figures 1 and 2, a filter head with aeration function mainly includes a filter rod 1, an air pipe 2, a filter cap 3 and a fixing ring 4. Air pipe 2 is installed in the filter rod and stretches into the filter cap 3 for a certain distance. Two symmetrically arranged air distribution holes 3-1 are opened at a certain position on the upper part of the filter cap 3, and four symmetrically arranged air distribution small holes 3-1 are opened at a certain position on the lower part at a certain distance from the upper part of the air distribution small hole 3-1. . Filter cap 3 is installed on the fixed ring 4, and fixed ring 4 is fixed by thread 1-1 on the filter rod 1. Wherein the top certain position of air pipe 2 has 4 evenly arranged air outlet holes 2-1, and the aperture diameter is 2.0mm. A circular tube-shaped air channel 2-2 is installed at a suitable position in the middle of the filter rod 1 and communicates with the bottom of the air pipe 2; two vertically arranged vertical backwash air inlet slots are opened at a certain position from the lower end of the filter rod 1 to the bottom 1-2, the size of the vertical backwash air inlet slot 1-2 is 20mm×2mm; the fixed ring 4 has six evenly distributed water distribution holes 4-1, and the opening ratio is 0.5-0.8%.

When this kind of filter head with aeration function is backwashing the filter, the water in the air-water distribution chamber of the filter enters the filter rod 2 through the vertical water inlet slit 1-2 at the bottom of the filter rod 2 and then passes into the filter cap 3 , forms a stable air-water layer with the air in the filter cap, and the lower water layer will distribute water evenly through the water distribution hole 4-1 in the fixed ring 4 at the bottom of the filter cap 3; at the same time, the air in the air-water distribution chamber of the filter tank passes through the air The air passage 2-1 enters the air delivery pipe 2, and then performs a primary air distribution in the filter cap through the air outlet hole 2-1 at the top of the air delivery pipe 2. Due to the large amount of air intake during backwashing, the air-water layer in the filter cap 3 is relatively large. Low, the backwash gas passes through the upper and lower rows of gas distribution holes 3-1 for secondary gas distribution. When the filter tank is normally filtered for aeration and oxygenation, due to the small amount of aeration air intake, the air and water layer in the filter cap 3 is relatively high, and the two air distribution holes 3-1 on the upper part realize the aeration distribution alone. The small air hole 3-1 adopts a large-resistance opening ratio and a small pore size (opening ratio 0.02% to 0.04%), so the aeration air can realize the distribution effect of small air bubbles and improve the oxygen transfer efficiency.

In summary, the filter head with aeration function of the present invention can realize the uniform distribution of aeration air, backwash air and backwash water at the same time with only one set of filter head equipment, reducing the equipment investment of the biological aerated filter , to improve operational stability.

Claims (6)

1. A filter head with aeration function, which includes a filter rod, an air delivery pipe, a filter cap, and a fixed ring, and is characterized in that: at least one air delivery pipe communicates with the filter cap on the filter rod, and the bottom end of the air delivery pipe Located at a suitable position in the middle of the filter rod, there are several backwash air inlet slots at the proper position on the lower part of the filter rod, two or more rows of air holes are evenly opened on the filter cap, and several cloth holes are opened on the fixing ring. water hole, the fixing ring is fixed under the filter cap by the thread on the filter rod. 2. A filter head with aeration function according to claim 1, characterized in that: the air delivery pipe is arranged inside or outside the filter rod, and there is at least one single air delivery pipe arranged inside the filter rod The air channel passes through the wall of the filter rod to connect the external air with the air inlet of the air pipe. 3. A filter head with aeration function according to claim 2, characterized in that: the air delivery pipe extends into the filter cap to a certain height, the air outlet is located at the top of the air delivery pipe, and the air inlet of the air delivery pipe Located at the bottom of the gas pipe. 4. A filter head with aeration function according to claim 3, characterized in that: the air outlet is a number of air outlet holes or a number of air outlet slits on the top of the air pipe, or other types of air distribution structure . 5. A filter head with aeration function according to claim 1, characterized in that two or more rows of evenly arranged air distribution holes are opened at a suitable position on the upper part of the filter cap. 6. A filter head with aeration function according to claim 1, characterized in that: said fixing ring has several evenly arranged water distribution holes.