Patent ID: 7381323
Filing Date: 2008-06-03
Classification: B01D

Abstract:
1. A filtration apparatus comprising: a tank for housing a fluid containing removables, a filter apparatus for filtering the fluid, a pump connected to the filter apparatus via a pipe, and a peel cistern connected to the pipe and operable to store filtered fluid filtered by the filter apparatus, wherein the peel cistern is located at a level above a fluid level of the fluid contained in the tank, an air diffuser located under the filter apparatus and generating air bubbles inside the fluid, an air pump for supplying gas via an air pipe connected to the air diffuser, wherein the air pipe comprises a first path and a second path which are parallel to each other, the first path being provided with a first adjustment valve and a first stop valve and the second path being provided with a second adjustment valve and a second stop valve, wherein each stop valve is operable to block or release the gas that passes inside the air pipe and each adjustment valve is regulated in advance so that a predetermined amount of gas is caused to pass there through, wherein an amount of gas flowing through the first adjustment valve is less than an amount of gas flowing through the second adjustment valve, and a controller to control operation modes of the filtration apparatus, wherein in a filtration mode, in which the fluid is pumped from the tank through the filter apparatus by the pump, the controller is operable to control the first stop valve to be open and the second stop valve to be closed, and wherein in a regeneration mode, in which the filtered fluid within the peel cistern flows from the peel cistern through the filter apparatus into the tank, the controller is operable to control the second stop valve to be open and the first stop valve to be closed.