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Diffuser (sewage)
About: Diffuser (sewage) is a research topic. Over the lifetime, 6487 publications have been published within this topic receiving 40404 citations.
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Patent•
19 Sep 1997
TL;DR: In this article, a diffuser pipe is used to clean the inside of a membrane by injecting bubbles from the diffuser to hit the membrane, and the bubbles are hit against the membrane by a blower.
Abstract: PROBLEM TO BE SOLVED: To completely clean the inside of a membrane by providing a diffuser pipe on the bottom side of a tank and the membrane above the diffuser pipe, connecting a pipeline having a pump to the membrane, allowing the bubbles injected from the diffuser pipe to hit the membrane, sucking a liq. chemical by the pump through the inside of the membrane and circulating the sucked chemical in the tank. SOLUTION: A tank 1 is filled with a liq. chemical 8, and a membrane 2 is dipped in the chemical 8 and arranged in the tank. A diffuser pipe 3 is provided on the bottom side of the tank 1, the diffuser pipe 3 is connected to a blower 4, and bubbles are injected from the diffuser pipe 3 and hit against the membrane 2. Further, a pipeline 5 is connected to the upper end of the membrane 2, a differential pressure gage 6 and a pump 7 are furnished to the pipeline 5, and the pipeline on the downstream side of the pump 7 is extended toward the inside of the tank 1. When the membrane 2 is cleaned, the blower is operated to inject the bubbles from the diffuser pipe 3 toward the membrane 2, the pump 7 is driven to suck the chemical 8 in the tank 5 through the membrane 2, the chemical 8 is recirculated into the tank 1, and the membrane 2 is cleaned by the chemical 8 passing through the inside of the membrane 2.
12 citations
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TL;DR: In this paper, a hybrid arrangement of conventional and vortex controlled diffusers was proposed to achieve high levels of pressure recovery within a short length of the original conical diffuser without either bleed-off or vanes projecting into the flow.
Abstract: A vortex controlled diffuser has recently been reported [1], which attained high levels of pressure recovery within a short length. This diffuser has, however, achieved only a limited application because of its bleed-off requirements. The present work indicates a means by which this disadvantage can be overcome by using a hybrid arrangement of conventional and vortex controlled diffusers. The outcome was an efficient diffuser, half the length of the equivalent conical diffuser, and which would operate satisfactorily without either bleed-off or vanes projecting into the flow.
12 citations