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US 6,440,265 B1Granted
FRP hood for paper processing plant
AssigneeBonded Fiberglass Co.
InventorBrian Judd
Life of this patent
Estimating the term…
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AssigneeBonded Fiberglass Co.
InventorBrian Judd
Estimating the term…
An improved hood enclosure for isolating wood pulp washing equipment from the ambient environment. The hood has a pair of end members, a pair of skirts along each side to connect to the end member together, and an upper spine also connected at each end to the end members. A pair of clamshell style doors are mounted to the spine along longitudinal hinge lines and are opened vertically. A plurality of access doors are positioned within the skirts, and a plurality of spray or shower pipes penetrate the hood through an end panel to deliver wash liquid to the internal wash drums positioned within the wash vat. Several sealing methods are incorporated to provide sealable access for the access doors, the clamshell doors, and access to the interior of the washing vat for the shower pipes. The clamshell doors abut a peripheral neoprene sealing gasket and are held against the gasket by their own weight. The access doors abut and enclose a raised comb on the hood skirt and an elastomeric closure strap biases the access door against a neoprene gasket positioned along the contact area of the door against the raised comb, thereby sealing the door when closed. At the penetration point of the hood, the washer spray pipes are seated in a saddle flange on one side and a series of half portals correspondingly positioned with saddle flange portals on the other side.
In a wood chip processing apparatus having a vat, a rotating drum positioned within said vat, and a plurality of shower pipes positioned above said drum and extending outside of said processing apparatus, an improved corrosion resistant hood enclosure for reducing the introduction of hazardous pollutants into the environment from said processing apparatus by facilitating the maintenance of a negative pressure within said hood enclosure, comprising two end members, an upper spine connected at each end to said end members, a pair of skirts extending between said end members on opposite sides of said spine, said skirts defining therein access portals sealalby covered by access doors, and at least one clamshell door hingedly connected to said hand enclosure and positioned between said spine and one of said skirts, said hood enclosure including means interspersed between said shower pipes and said bond enclosure for providing sealed passage of said shower pipes through said hood enclosure.
In a wood chip processing apparatus having a vat, a rotating drum positioned within said vat, and a plurality of shower pipes positioned above said drum and extending outside of said processing apparatus, an improved fiber reinforced glass hood enclosure for reducing the introduction of hazardous pollutants into the environment from said processing apparatus by facilitating maintenance of a negative pressure within said enclosure, comprising two end members, an upper spine connected at each end to said end members, a pair of skirts extending between said end members on opposite sides of said spine, at least one door defined hingedly affixed to one of said end members of said enclosure and sealably mounted thereto and at least one clamshell door hingedly connected to said hood enclosure and positioned between said spine and one of said skirts, said hood enclosure including sealing means interspersed between said clamshell door and said hood enclosure for sealing said clamshell door against said hood enclosure upon closure.
In a wood chip processing apparatus having a vat, a rotating drum positioned within said vat, and a plurality of shower pipes positioned above said drum and extending outside of said processing apparatus, the improvement comprising:
In a wood chip processing apparatus having a vat, a rotating drum positioned within said vat, and a plurality of shower pipes positioned above said drum and extending outside of said processing apparatus, an improved chemically resistant hood enclosure for reducing the introduction of hazardous pollutants into the environment from said processing apparatus by facilitating the maintenance of a negative pressure in said vat, comprising two end numbers, a closed panel assembly connected at each end to said end members, a pair of skirts extending between said end members on opposite sides of said closed panel assembly, said hood enclosure including means interspersed between said shower pipes and said hood enclosure for providing sealed passage of said shower pipes through said hood enclosure, further including access door means formed in at least one of said skirts in said hood enclosure for providing sealed access into said vat.
In a wood chip processing apparatus having a vat, a rotating drum positioned within said vat, and a plurality of shower pipes positioned above said drum and extending outside of said processing apparatus, an improved hood enclosure for reducing the introduction of hazardous pollutants into the environment from said processing apparatus, comprising two end members, a rigid upper panel assembly, a pair of skirts extending between said end members on opposite sides of upper panel assembly, said hood enclosure including access door means formed in at least one of said skirts in said hood enclosure for providing sealed access into said vat.
Dependencies are inferred from the claim text.