Aeration device, operation method therefor, and water treatment apparatus

Abstract

The present invention relates to an aeration device provided with: an aeration tube, in the upper part of which multiple aeration holes are formed and which extends in the horizontal direction; and an open-ended tube. One end of the open-ended tube directly or indirectly communicates with an end of the aeration tube and the open end of the open-ended tube opens downward in the vertical direction and satisfies formula (1). The present invention provides: an aeration device, which is capable of uniform aeration, can be placed conveniently, and with which complication of tube placement does not occur easily; an operation method therefor; and a water treatment apparatus provided with the aeration device. (In formula (1), (D) is the internal diameter (mm) of the aeration tube, (d) is the diameter (mm) of the aeration holes, (n) is the number of aeration holes per one aeration tube, and (Q) is the air flow (l / min) of the gas supplied per one aeration tube.)

Description

technical field [0001] The invention relates to an air diffuser arranged under a membrane module unit, an operating method thereof, and a water treatment device provided with an air diffuser arranged under a membrane module unit. [0002] This application claims priority based on Japanese Patent Application No. 2012-235750 filed on October 25, 2012, and Japanese Patent Application No. 2012-256145 filed on November 22, 2012 in Japan, and the contents thereof are incorporated herein. Background technique [0003] In the past, in the water tank of water treatment equipment (such as activated sludge treatment equipment, membrane cleaning equipment, membrane separation equipment and wastewater treatment equipment, etc.) with membrane module units, the air diffuser having the air diffuser tube with a plurality of air diffuser holes formed The device is configured to be located below the membrane module unit, so that air and other air-diffusing gas is sprayed into the water tank to...

AI Technical Summary

Problems solved by technology

[0006] However, in this case, in the vicinity of the terminal 11b in the diffuser pipe 11, turbulent flow of the gas for diffuser is likely to occur, and the diffuser from the diffuser holes 14 on the side of the terminal 11b cannot be uniformly diffused.

As a result, there is a problem that the membrane module cannot be cleaned sufficiently due to variation in the diffused air, and the function of the membrane module is reduced due to the adhesion (clogging) of sludge, etc.

[0007] In addition, the air diffuser usually operates under the condition of a large air volume, but there are the following problems: the larger the air volume of the air diffuser, the more expensive the operating cost and equipment costs due to the increase in power consumption

[0015] However, if Figure 12 to Figure 14 As shown, it is difficult to arrange the main piping and the diffuser pipe at a certain angle. In addition, in most cases, the calculation is based on experience and the location is judged, which lacks versatility.

In addition, there is a tendency for piping to be complicated

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