Hatch Ltd.

Albert J Koning

Kevin S Fraser

David Warnica

Jennifer Woloshyn

Patrick Henry Lauzon

Michael Franceschini

Arthur W Cooper

An apparatus is disclosed for reducing pressure and velocity of a particulate-laden, supersonic vent gas stream from a pressure vessel such as an autoclave. The apparatus includes a diverging duct in which the vent gas expands, and a perforated plate located inside the diverging duct. The perforated plate provides an area reduction that increases back pressure and forces an upstream normal shock in the diverging duct, thereby bringing about a desired reduction in pressure and velocity. The perforated plate is comprised of a material, such as a ceramic, that is resistant to erosion by the abrasive particulate entrained in the high velocity vent gas. The perforated plate has a central portion provided with holes and an imperforate peripheral portion which is resiliently received between connection flanges of the duct.

Apparatus for stabilization and deceleration of supersonic flow incorporating a diverging nozzle and perforated plate

Insulating members are provided for use in nozzles of elevated temperature process vessels employing a structural metal shell (), an insulating refractory lining () and a corrosion-resistant membrane () lining between the structural shell and refractory lining. The insulating members comprise pre-formed insulating sleeves and inserts and are made of a thermally insulating material having sufficient thickness and sufficiently low thermal conductivity such that, when the sleeve or insert is heated by the process temperature during operation of the vessel, the thermal energy transmitted through the sleeve or insert to the membrane is insufficient to raise the temperature of the membrane above a target temperature. The most preferred thermally insulating materials are fluoropolymers such as poly(tetrafluoroethylene) flouropolymer resins.

Insulating inserts for elevated temperature process vessels

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Stoney Creek, Canada

Albert J Koning