Pulse backwashing deep bed filter device and method

Abstract

The invention discloses a pulse backwashing deep bed filter device and a method, and belongs to the technical field of automatic control. A set of device may be provided with 1, 2.....n pulse backwashing deep bed filters; the pulse backwashing deep bed filter comprises a casing, a water collection mechanism arranged on the lower part of the casing and a connecting tube thereof, a water distributing mechanism arranged on the upper part of the casing and a connecting tube thereof, a filter material cushion layer arranged on the lower part of the casing, a filter material arranged in the middle part of the casing, and a filter material height detection device arranged on the upper part of the casing; a backwashing pump is a centrifugal pump, the rotating speed of an arranged motor can be regulated in variable frequency; a flow detection device is arranged on a main backwashing pipeline of a backwashing pump outlet; a control cabinet is provided with a PLC (programmable logic controller), and also provided with a frequency converter for regulating the rotating speed of the backwashing pump; the flow detection device and the filter material height detection device are provided with detection signal output ends which are connected with signal acquisition ends of the PLC. The effect of the pulse backwashing deep bed filter device is that: water-saving high-efficiency cleaning of a filtering layer can be performed by used of backwash water producing flow fluctuation.

Description

technical field [0001] The invention relates to a pulse backwash deep bed filter device and method, belonging to the technical field of automatic control. Background technique [0002] Deep bed filtration devices are widely used in petroleum exploration, metallurgy, electric power, tap water and other industries. The filter material widely uses hard particle filter materials such as quartz sand, corundum, garnet, magnetite, glauconite, anthracite, ceramsite or soft fiber ball filter materials. Compared with surface filtration, deep bed filtration has the advantages of large interception capacity, long filtration cycle, impact resistance, and simple operation and maintenance. However, due to the influence of working conditions and human factors in the actual use process, the incomplete backwashing of the filter causes the phenomenon of filter material hardening and filter material loss, which makes the filter lose its ability to intercept dirt, resulting in poor water qualit...

AI Technical Summary

Problems solved by technology

Aiming at the problems of constant backwashing water volume, low backwashing efficiency, and inability to achieve the backwashing effect in previous filter devices, the present invention increases the instantaneous maximum backwashing flow rate by providing pulsed backwashing water, and the collision and friction between filter material particles is severe, increasing the Large backwash intensity, high flow for short duration, will not expand the filter bed very high

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