The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 07, 2014
Filed:
Jul. 04, 2007
Yoshihito Nakahara, Toyohashi, JP;
Tetsuya Torichigai, Toyohashi, JP;
Hirouki Okazaki, Toyohashi, JP;
Yoshihito Nakahara, Toyohashi, JP;
Tetsuya Torichigai, Toyohashi, JP;
Hirouki Okazaki, Toyohashi, JP;
Mitsubishi Rayon Co., Ltd., Tokyo, JP;
Abstract
An air diffuser apparatus component in a membrane filtration unit including an air main pipe connected to an aeration blower(s), liquid supply piping that joins the air main pipe in midstream, a branch conduit horizontally connected through a gas supply pipe branched from the air main pipe, and a plurality of air diffusion pipes horizontally to the branch pipe conduit, each diffusion pipe having diffusion holes opening substantially vertically downward, is cleaned. This involves setting a gas flow rate in the branch pipe conduit in a range of 1 m/sec or more and 8 m/sec or less, and a liquid supply rate in the branch pipe conduit in a range from 0.03 L/min/mmto 0.2 L/min/mm. This solid sludge clogging diffusion holes to be efficiently removed with a gas-liquid mixing fluid without stopping for a drainage treatment.