Patent ID: 6309447
Filing Date: 2001-10-30
Classification: B01D

Abstract:
A pulse pipe for use in pulse-jet cleaning of filter bags disposed in a baghouse in a pre-determined arrangement, said pulse pipe comprisinga cylindrical, hollow inner tube and a cylindrical, hollow outer tube with said inner tube arranged coaxially within said outer tube, said inner tube and said outer tube being configured for relative rotation therebetween about a common longitudinal axis, said inner tube and said outer tube each having a series of apertures formed therein,a source of gas which supplies gas to the interior of said inner tube, wherein said source of gas comprises pulse valving which regulates the supply of gas into the interior of said inner tube,wherein one of said inner tube and said outer tube constitutes a first tube and the other of said inner tube and said outer tube constitutes a second tube, andwherein a) the apertures in said first tube are positioned to correspond to the pre-determined arrangement of the filter bags in the baghouse; and b) the apertures in said second tube are positioned such that as said second tube rotates relative to said first tube, different subsets of the apertures in said second tube intermittently come into alignment with the various apertures in said first tube and allow gas supplied to the interior of said inner tube to pass out of said pulse pipe.