Chemical apparatus and process disinfecting – deodorizing – preser – Chemical reactor – With means applying electromagnetic wave energy or...
Patent
1989-12-29
1990-11-06
Lechert, Jr., Stephen J.
Chemical apparatus and process disinfecting, deodorizing, preser
Chemical reactor
With means applying electromagnetic wave energy or...
42218607, 250436, 250437, B01J 1912
Patent
active
049684892
ABSTRACT:
In an oxidation chamber for treating wastewater, an ultraviolet lamp is mounted inside a quartz tube that is surrounded by the wastewater in the oxidation chamber. During operation, the quartz tube becomes quite hot and becomes coated with a film of slime that reduces transmission of the ultraviolet radiation into the wastewater. This results in gradually decreasing efficiency of operation until its becomes necessary to interrupt the operation of the chamber and to remove the quartz tube so that it can be cleaned to restore the transmission.
In accordance with the present invention it has been found advantageous to apply a thin layer of fluoroethylene propylene (FEP) to the outer surface of the quartz tube. It has been found that the FEP layer is less suspectible to the deposition of slime than is the unprotected quartz tube, and that the slime is more easily removed from the FEP layer than from an unprotected quartz tube. Further, the FEP layer strengthens the quartz tube and protects it from localized stresses and damage caused by impact. This protective effect makes it possible to use quartz tubes having thinner walls, and that increases the transmission of the ultraviolet radiation through the quartz wall. The FEP layer also reduces handling damage to the quartz tube and protects the maintenance workers from injury.
REFERENCES:
patent: 4855112 (1989-08-01), Adcock
patent: 4897246 (1990-01-01), Peterson
Bhat Nina
Lechert Jr. Stephen J.
McKown Daniel C.
Peroxidation Systems, Inc.
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