Sand washer for active sand filter

Abstract

The invention discloses a sand washer for an active sand filter. The sand washer comprises a top separation cylinder, and a sand washing turbulence device connected with the top separation cylinder, wherein the top separation cylinder comprises an outer cylinder and an inner cylinder; the sand washing turbulence device comprises a central stripping tube, a plurality of superposed sand washer innerrings, a plurality of superposed sand washer outer rings and upper and lower gaskets; the central stripping tube is communicated with the inner cylinder; the sand washer inner rings are arranged on the central stripping tube in a sleeving manner; the sand washer outer rings are arranged at the peripheries of the sand washer inner rings in a sleeving manner; the upper and lower gaskets are used for pressing the plurality of superposed sand washer inner and outer rings; and S-shaped turbulent sand washing channels are formed in gaps between the sand washer inner rings and the sand washer outerrings. According to the structural improvement of the sand washer, the problems in the prior art that turbulence rings arranged in stainless steel tubes are short in service life and difficult to mount and maintain are solved.

Description

technical field [0001] The invention relates to various water treatment fields such as sewage treatment, reclaimed water reuse, drinking water treatment, etc., and particularly relates to a sand washing device in an active sand filter. Background technique [0002] The sand washer is an indispensable supporting device on the active sand filter, and its function is to automatically and continuously clean the filtered sea sand. The sea sand passes through the unique cleaning channel of the sand washer, which separates and purifies the suspended matter and restores the filtering function of the sea sand. [0003] In the traditional sand washing device, the inner and outer shells are divided into left and right parts and connected by bolts. Due to the inherent defects of the injection molding process, the out-of-round deformation, especially the jacket is more serious. As a result, the sand washing channel is irregular and not smooth, and sand plugging is prone to occur. Due ...

AI Technical Summary

Problems solved by technology

Due to the inherent defects of the injection molding process, out of round deformation, especially the jacket is more serious

In this way, the sand washing channel is irregular and not smooth, and sand plugging is prone to occur

Due to the thin material and large deformation of the sand washing device, it is not suitable for brittle materials and materials with a large shrinkage deformation coefficient.

[0004] In the prior art, in order to overcome the above problems, a tapered flap is set on the inner wall of the cylinder or the cylinder is set in a wave shape. The cylinder is made of stainless steel, which is easily deformed and out of round during the welding process, resulting in short service life and difficult maintenance.

[0005] For example, Chinese patent ZL200920240954.4 discloses a sand washing device for active sand filters. By setting three wavy cylinders, outer, middle and inner, it forms dual channels for sand washing, increasing the amount of sand washing, and passing The wavy cylinder effectively increases the sand washing effect, but because the cylinder is set in a wave shape, the processing difficulty increases, and the amplitude of the waves is difficult to meet the sand washing needs

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