Unpowered biological filtration tower

Abstract

The invention relates to an unpowered biological filtration tower, which belongs to the technical field of water treatment equipment. The unpowered biological filtration tower comprises a tower body, a water inlet pipe, a water outlet pipe, a water distributor and a filter material layer, wherein the water inlet pipe and the water outlet pipe are respectively arranged on the upper part and the lower part of the tower body; the water distributor is arranged on the upper part in the tower body and is connected with the water inlet pipe; the filter material layer is filled in the tower body and is positioned below the water distributor; the top part of the tower body is provided with a blast cap; and the side wall of the lower part of the tower body is provided with an air inlet. In the unpowered biological filtration tower, the blast cap is subtly arranged on the top part of the tower body to form a negative pressure above the filtration tower, so that external air enters the tower from the air inlet on the lower part of the filtration tower and then is discharged from the blast cap to form air flow, which not only achieves better aeration oxygenation effects but also saves fan power facilities so as to realize unpowered biological sewage treatment.

Description

technical field [0001] The invention relates to a biological filter tower, which belongs to the technical field of water treatment equipment. Background technique [0002] At present, there are two main types of water treatment equipment that are generally known through biofilm filtration: one is tower biofilter such as figure 1 shown; the second is the biological aerated filter (or filter tower) such as figure 2 shown. The tower type biological filter usually has a height of 8-24m and a diameter of 1-3.5m. It is generally composed of a tower body, filter material, water distribution system, ventilation and drainage devices. The existing tower-type biological filter has a high construction cost due to the high tower body; and the filtering effect is limited due to the single filter material. Biological aerated filter usually consists of tank body, filter material, supporting layer, water distribution system, water outlet system and pipeline, ventilation and control syste...

AI Technical Summary

Problems solved by technology

The defects of the existing biological aerated filter are as follows: 1) due to the open structure, it is easy to generate odor and mosquitoes, which affects the surrounding environment; 2) the filter material is usually densely arranged and easy to block, so it is necessary to add backwashing facilities, Resulting in high operating costs and complicated maintenance and management

The existing tower-type biological filter and biological aerated filter still have a common defect: fan power facilities need to be configured, so energy consumption is large, and operation and maintenance costs are high

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