Filtration unit, installation method for a filtration unit and filtration apparatus

Abstract

A filter unit, a method for setting the filter unit, and a filter device, on the filter unit (1), on a bottomed cylindrical casing (2) that is immersed in a water storage tank or a water storage tank that guides raw water It has an introduction port (2A) for introducing raw water in a water storage tank or the like into the housing (2), an activated carbon supply mechanism (5) for adding activated carbon to the introduced raw water, and a mechanism for stirring and adding activated carbon in the housing (2). Stirring mechanism (4) for raw water, filter element (3) for filtering raw water, backflow suppressing mechanism (6) for suppressing the backflow of raw water in the casing (2) to the guide inlet (2A) and discharge into the water storage tank, etc., and the discharge casing The discharge mechanism (7) of the raw water in the body (2). When filtering raw water with activated carbon added through a filter module made of a hollow fiber membrane, etc., it is possible to prevent the increase in the space of the entire filter device including the water storage tank, and to reduce the amount of activated carbon added and reduce costs due to effective use. .

Description

technical field [0001] The present invention relates to a filter unit installed in a water storage tank or a water storage tank of a sedimentation tank such as a water purification plant for filtering and treating raw water, a method for installing such a filter unit, and a filter device provided with the filter unit. Background technique [0002] As such a filter device, for example, as described in the proposals of Patent Documents 1 to 5, a filter module composed of a hollow fiber membrane or the like is immersed in a tank into which raw water is introduced, and an air diffuser that diffuses air into the tank is installed under the filter module. Diffusion tube. Furthermore, in the filter devices described in the patent documents 1 to 5, activated carbon is added to the raw water introduced into the tank, or activated carbon is immersed or built in the tank, and the organic matter in the raw water is adsorbed by the activated carbon, In order to improve the filtration ef...

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Problems solved by technology

[0008] However, in the filter device described in Patent Document 2, activated carbon is added to the raw water introduced into the tank (container), and in the filter device described in Patent Document 5, activated carbon is immersed in the treatment tank into which the raw water is introduced. , Therefore, regardless of the amount of raw water introduced, in order to sufficiently improve the filtration efficiency with the activated carbon, it is necessary to add a large amount of activated carbon, resulting in an increase in cost

Moreover, since the raw water introduced into the tank contains a large amount of sludge, etc., the activated carbon discharged from the bottom of the container described in Patent Document 2 is in a turbid state with the sludge and can only be left intact. Dispose of as waste

On the other hand, the filter devices described in the remaining patent documents 1, 3, and 4 are to introduce raw water from which sludge has been separated to some extent by pre-sedimentation separation tanks, etc., into other treatment tanks, etc., and use activated carbon and filter modules. Filtration is performed, but at this time two tanks are required, and a larger space is required to install the filtration device

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