Water treatment device and method for cleaning filtration material layer for water treatment device

Abstract

The invention provides a water treatment device and method for cleaning the same, which can reduce the ratio of cleaning water volume to the treated water volume (filtered water volume), thereby can improve water treatment efficiency and cause the structure compacter and simplier. A water treatment device comprising: a jet nozzle (7) for mixed raw water flow; a filtration tank (5) for containing a filtration material layer (4) which comprises two layers which are an upper layer (2) and a lower layer (3) and are arranged below the jet nozzle for mixed raw water flow, the upper layer consisting of filtration materials having a smaller specific gravity and a greater particle diameter than the filtration materials of the lower layer; a water collecting / distributing pipe (13) for extracting filtered water and supplying reverse washing water to the filtration material layer in reverse washing operation; a filtration material vibrating means for vibrating each particle of the filtration materials, the filtration material vibrating means being provided with a vibration element (9) connected to the power source and also with vibration expansion elements (10) embedded in the upper layer (2) in such a manner that the vibration of the vibration element (9) is transmitted to the vibration expansion elements (10); and a drainage trough (12) provided above the filtration material layer.

Description

technical field [0001] The present invention relates to water treatment equipment, and in particular to water treatment capable of oxidizing iron, manganese, and other soluble components in groundwater, etc., without using chemicals such as oxidizing agents and coagulants, so as to be insoluble and treated with a simple and compact equipment A method for cleaning the device and its filter material layer. Background technique [0002] Groundwater is used as raw water for tap water, and is also used in industries that require large amounts of water, such as the food industry, soft drinks, brewing, public baths, and dyeing. However, iron and manganese contained in groundwater are currently a major problem. Although iron and manganese are essential components for the human body, if they exceed a certain amount, the water will have a metallic taste and become the cause of red water and black water. kind of question. In addition, in building foundation construction, groundwater ...

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Problems solved by technology

[0012] The filtration speed of this water treatment device is 60m / day~130m / day, but in the case of needing to carry out filtration treatment at a higher speed, the cleaning of the filter material layer must also be carried out frequently, therefore, for the lower part of the filter material layer The load of biological treatment is also further increased. Therefore, in this water treatment device, there is a limit in the cleaning efficiency of the filter material layer, and it is impossible to achieve further high-speed operation.

[0013] In addition, including the above-mentioned water treatment device, the existing water treatment device must consume about 10% to 15% of the filtered water in order to perform the above-mentioned cleaning of the filter material layer, so the efficiency of water treatment is greatly reduced.

[0014] In addition, although the above-mentioned water treatment device has a mechanism for reciprocating the raw water supply pipe on a surface parallel to the surface of the filter material layer in order to clean the surface of the filter material layer, since this mechanism must use an electric motor to reciprocate the raw water supply pipe Therefore, not only a large power is required for surface cleaning, but also there are complex mechanisms for reciprocating motion, and the wear of the moving rail of the raw water supply pipe, the loss of the hose supplying the raw water supply pipe, etc. troublesome and expensive problems

In addition, in order to move a series of raw water supply pipes arranged in a straight line at the same time, the shape of the filter tank must be rectangular, so the device becomes large, and there is a possibility that it is impossible to realize the device even if the installation place of the device is narrow. compactness problem

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