Filtering pool for transverse stream filtering

Abstract

The invention discloses a filter tank for filtering cross flow, which comprises a tank body, an inlet tube, an outlet tube, an intake channel, an outtake channel and a filter layer, wherein, the intake channel and the outtake channel are intersected and alternatively set up on the bottom part of the tank body and the filter layer is arranged between the intake channel and the outtake channel. Besides, a back washing device is arranged in the filter layer, which comprises an air inlet pipe, an air lift pipe, a sand separator and a sand distributor, wherein, the sand separator comprises an annular back washing cavity and a central dirt gathering cavity and is further connected with a drain outlet externally. An inlet of the drain outlet goes through the back washing cavity and is communicated with the central dirt gathering cavity. Compared with the prior art, the invention creates a total new filter tank that can filter transversely on the same horizontal surface. The filter area is far larger than a longitudinal filter mode with a tank body of the same size since the cross filter mode is used. The filter area is enlarged by cross flow filter, thereby greatly promoting the water yield of the filter tank.

Description

technical field [0001] The invention relates to the technical field of filter tanks for water treatment, in particular to a filter tank for cross-flow filtration. Background technique [0002] In the current conventional filter tanks, the flow direction of the water to be filtered is generally longitudinal from the top of the filter tank to the bottom of the filter tank, that is, longitudinal flow. Currently, the most widely used filter tank-V-type filter tank adopts this method. . This kind of filter tank has the function of air-water backwashing, and the filtered water quality is better, and the filter life cycle is longer, but its actual filtration speed is relatively low, generally around 8-12m / h. Usually, after the filter tank is laid, the filter area of ​​the filter tank is fixed. According to the formula: Q (flow rate) = S (filter area) × V (filter speed), in the case of a fixed filter area, if you want to increase the output The water production of purified water m...

AI Technical Summary

Problems solved by technology

However, in practical applications, the filtration speed is also limited, and it is impossible to increase it indefinitely according to the ideal state. If the speed is to be increased, the water quality of the purified water after filtration will not meet the standard, or the filter in the filter pool Due to high-intensity work, the filtration period of the filter pool becomes very short, which is not economical, and it is easy to make the working conditions of the filter pool become disordered or even out of control, which is not conducive to the normal maintenance of the filter pool

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