Apparatus and method for improved pulse-jet cleaning of industrial filters
AssigneeSouthern Research Institute
InventorLarry G. Felix
Life of this patent
Estimating the term…
Abstract
An improved apparatus and method for pulse-jet cleaning of filter bags in a baghouse using pulsed, high-pressure/low-volume, intermediate-pressure/intermediate-volume, or low-pressure/high-volume pulsed air flow. Relative movement between a first tubular member and a second member causes apertures in the members to align intermittently. When the apertures are aligned, pressurized air is fed, through a pulse valve or from a combustion chamber, into the tubular first member and flows out of the aligned apertures in a short, energetic pulse. The pulse is directed down into a filter bag arranged below the pulse pipe to pulse-clean the filter bag or into another pulse pipe arranged above a filter bag.
Claims20
A pulse pipe for use in pulse-jet cleaning of filter bags disposed in a baghouse in a pre-determined arrangement, said pulse pipe comprising
- a tubular first member including a first series of apertures formed therein;
- a second member extending about a portion of said tubular first member and including a second series of apertures formed therein;
- and
- a source of gas configured to intermittently supply a gas pulse into an interior of said tubular first member;
- wherein said first and second members are configured for movement in relation to one another such that at least some of said apertures in said second member intermittently come into alignment with at least some of said apertures in said first member and allow gas supplied to the interior of said first member to pass out of said pulse pipe.
A filter bag baghouse assembly, comprising
- a chamber having an inlet portion and an outlet portion with a plurality of sleeve-type or tubular filter bags disposed therein in a pre-determined arrangement, the filter bags having closed ends disposed toward the inlet portion of said chamber and open ends disposed toward the outlet portion of said chamber, and
- a plurality of pulse pipes disposed near the open ends of the filter bags,
- wherein each of said pulse pipes comprises
- a tubular first member including a first series of apertures formed therein;
- a second member extending about a portion of said tubular first member and including a second series of apertures formed therein;
- and
- a source of gas configured to intermittently supply a gas pulse into an interior of said tubular first member;
- wherein said first and second members are configured for movement in relation to one another such that at least some of said apertures in said second member intermittently come into alignment with at least some of said apertures in said first member and allow gas supplied to the interior of said first member to pass out of said pulse pipe.
A filter bag baghouse assembly, comprising
- a chamber having an inlet portion and an outlet portion with a plurality of sleeve-type or tubular filter bags disposed therein in a pre-determined arrangement, the filter bags having closed ends disposed toward the inlet portion of said chamber and open ends disposed toward the outlet portion of said chamber;
- a plurality of secondary pulse pipes disposed near the open ends of the filter bags;
- and
- a primary pulse pipe including:
- a tubular first member including a first series of apertures formed therein;
- a second member extending about a portion of said tubular first member and including a second series of apertures formed therein;
- and
- a source of gas configured to intermittently supply a gas pulse into an interior of said tubular first member;
- wherein said first and second members are configured for movement in relation to one another such that at least some of said apertures in said second member intermittently come into alignment with at least some of said apertures in said first member and allow gas supplied to the interior of said first member to pass out of said primary pulse pipe into at least one of said secondary pulse pipes.
A method of pulse-jet cleaning sleeve-type or tubular filter bags disposed in a rectangular array in a filter bag baghouse, said rectangular array comprising rows and columns of filter bags, said method comprising intermittently injecting a low-pressure/high-volume flow of gas into varying subsets of the filter bags in each row or each column in said array, the subsets each comprising less than all of the filter bags in each row or each column, respectively, wherein said step of intermittently injecting a flow of gas includes supplying gas to a tubular first member with a first series of apertures formed therein and causing relative linear movement between the first member and a second member with a second series of apertures formed therein.
Dependencies are inferred from the claim text.