Constant flow felt dewatering system
AssigneeAlbany International Corp.
InventorJoseph A. Bolton
Life of this patent
Estimating the term…
Abstract
A constant flow felt dewatering system including first and second suction pipes with a slot in each pipe. A felt is positioned to pass over the slots of the first and second pipes. A centrifugal exhauster is connected by conduits to the first and second suction pipes. Drive structure is provided to operate the centrifugal exhauster and apply suction to the first and second suction pipes and to advance the felt over the pipes whereupon suction is applied thereto to dewater the felt. Controls are responsive to change in felt conditions to vary the dwell time of the felt with respect to the slots in order to maintain a substantially constant flow.
Claims16
A substantially constant flow felt dewatering system comprising;
- at least one suction pipe having at least one slot therein, a felt positioned to pass over the at least one slot, vacuum means including a centrifugal pump where the drive horsepower for the pump is proportional to the air flow at the pump, conduit means connecting the at least one suction pipe to the vacuum means, means to advance the felt over at least one pipe wherein vacuum is applied thereto to dewater the felt, means for sensing the drive horsepower and means responsive to the sensed horsepower for automatically controlling the air flow through the suction pipes to cause slot width adjustment and/or arrangement to vary the dwell time in order to maintain a substantially constant air flow under varying vacuum conditions.
A constant flow felt dewatering system comprising;
- a first suction pipe having a slot therein, a second suction pipe having a slot therein, a felt positioned to pass over the slots of the first and second suction pipes, vacuum means including a centrifugal pump where the drive horseposer for the pump is proportional to the air flow at the pump, conduit means connecting the first and second suction pipes to the vacuum means, means to advance the felt over the pipes whereupon suction is applied thereto to dewater the felt, means for sensing the drive horsepower and means responsive to the sensed horsepower for automatically controlling the air flow through the suction pipes to vary the dwell time of the felt with respect to the slots in order to maintain a substantially constant air flow under varying vacuum conditions.
A method of providing a substantially constant flow felt dewatering system comprising;
- providing at least one suction pipe having at least one slot therein, connecting the at least one suction pipe to a source of vacuum including a centrifugal pump with a drive horsepower for the pump is proportional to the air flow at the pump to apply suction to the at least one suction pipe, advancing a felt over the at least one slot of the at least one pipe whereupon suction is applied thereto to dewater the felt, sensing the drive horsepower and automatically controlling the slot width adjustment and/or arrangement in response to the sensed horsepower to vary the dwell time in order to maintain a substantially constant air flow under varying vacuum conditions.
A method of providing a constant flow felt dewatering system comprising;
- arranging a first suction pipe having a slot therein and a second suction pipe having a slot therein in predetermined position with respect to one another, connecting the first and second suction pipes by conduits to vacuum means including a centrifugal pump where the drive horsepower for the pump is proportional to the air flow at the pump for applying suction to the first and second suction pipes, advancing a felt over the slots of the pipes whereupon suction is applied thereto to dewater the felt, sensing the drive horsepower and automatically controlling air flow through the suction pipes in response to the sensed horse power to vary the dwell time of the felt with respect to the slots such that a constant air flow is maintained under varying vacuum conditions.
Dependencies are inferred from the claim text.