Independent filter head for stable-pressure water distribution and gas distribution of air cushion layer and application method thereof

Abstract

The invention discloses an independent filter head for stable-pressure water distribution and gas distribution of an air cushion layer and an application method thereof. The filter head comprises a filter head cap, a filter head cap bottom plate, a filter head rod, a filter screen and a pre-embedded pipe sleeve, wherein the filter head cap is of a circular arch; the top of the filter head cap is provided with a residual gas releasing hole, the waist is provided with an upper gas distribution hole and a lower gas distribution hole, and the bottom plate is provided with a water distribution hole; the upper part of the filter head rod is provided with filter head rod installation screw thread, a filter head rod water distribution pipe is arranged in the filter head rod, a filter head rod gas distribution pipe is adhered on the inner pipe wall at one side of the filter head rod water distribution pipe, the length of the lower part of the filter head rod water distribution pipe is larger than that of the gas distribution pipe, the middle part of the filter head rod gas distribution pipe is provided with a filter head rod residual gas releasing hole, and the pipe wall at the outer side of the lower part of the filter head rod gas distribution pipe is provided with a vertical gas inlet seam; and the filter screen of the filter head can be assembled at the bottom of the water distribution pipe, the filter head pre-embedded pipe sleeve is of a pipe clamp shape, and the lower part of the filter head pre-embedded pipe sleeve is of a bell mouth shape. The filter head disclosed by the invention integrates aeration, water filtration and back washing functions, thereby simplifying the structure of a filter pool, ensuring work quality and improving efficiency. The filter head disclosed by the invention can be widely applied to a sewage biological filter pool treatment system and gas-water backwashing filter pools in water supply and other industries.

Description

technical field [0001] The invention relates to a water and air distribution device for water treatment equipment. Background technique [0002] The relatively advanced biological aerated filter currently in operation generally adopts a V-shaped filter structure, and the aeration system and backwash gas distribution are divided into two independent systems. The aeration system is equipped with special pipes and aeration heads, and filter heads and filter plates are used for backwashing air flushing and air-water mixed flushing air distribution. [0003] 1. Filtration and aeration process of V-shaped biological aerated filter [0004] Raw water flows into the filter tank evenly through the water distribution holes of the water inlet channel, and uses the gravity of water to permeate through the filter material layer, and flows into the sump at the bottom of the filter tank through the gap on the filter head installed on the filter plate and the filter head rod. , and flow ...

AI Technical Summary

Problems solved by technology

[0010] In the traditional method, the aeration head and filter head, air intake pipe and backwash air pipe are set independently, which not only increases the construction investment but also increases the difficulty of construction

In addition, in the aeration process, the aeration head (aeration perforated tube or aerator) is directly supplied by the aeration pipeline without pressure stabilization facilities, which will affect the quality of aeration

At the same time, because the traditional biological aerated filter only forms an air cushion layer at the bottom of the filter plate during backwashing, the unstable air pressure of the filter during backwashing with air and water will also affect the backwashing effect of the filter

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