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US 5,965,097 AGranted
Rotary device for catalytic cleaning of gaseous effluents
AssigneesInstitut Francais du Petrole, Jacques Bourcier
InventorsJean Morlec, Jacques Bourcier
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AssigneesInstitut Francais du Petrole, Jacques Bourcier
InventorsJean Morlec, Jacques Bourcier
Estimating the term…
The invention relates to a cleaning device wherein polluted effluents are passed into a cage (2) where a partitioned ring (1) of vertical axis, containing a charge (M) of a solid material exhibiting a large heat exchange surface and, against the inner wall thereof, a catalyst bed (9), rotates. An autothermal working point is reached by including in the catalyst bed heating means (resistors for example) that are temporarily connected to the power supply system, after which the cleaning operations with rotation of the ring and effluent circulation are launched. Heat control is thereafter provided by controlled injection into the effluents of either a fuel or sprayed water for example by means of injectors (15, 16). The device can be applied in the field of incineration of VOC for example in industrial effluents.
A rotary device intended for catalytic cleaning of gaseous effluents loaded with polluting substances, comprising a housing or cage, a ring of vertical axis arranged within the cage and containing a thermal charge of materials exhibiting a heat exchange surface, motive means for driving the ring in a rotating motion with respect to the cage, a catalyst bed reactor provided in a central part of the ring for cleaning effluents, at least one feed pipe for feeding effluents into the cage, at least one discharge pipe for discharging effluents from the cage, the cage comprising at least a first ring sector communicating continuously with the feed pipe and at least a second ring sector communicating continuously with the discharge pipe, heating elements embedded in the catalyst bed reactor for being temporarily connected to a power supply unit external to the device for a time sufficient to bring the catalyst bed reactor to a temperature sufficient to trigger a reaction of catalytic oxidation of the polluting substances, and means for injecting fluids into the effluents fed into the device to control the temperature prevailing in the reactor during effluent cleaning operations.
A process intended for continuous cleaning of gaseous effluents loaded with polluting substances by catalytic incineration, comprising providing a device comprising a cage, a ring of vertical axis arranged within the cage and containing at least a thermal charge of materials exhibiting a heat exchange surface, motive means for driving the ring in a rotating motion with respect to the cage, a catalyst bed reactor arranged in the central part of the ring in order to clean the effluents, heating elements embedded in the catalyst bed reactor, at least one feed pipe for feeding effluents into the cage and at least one discharge pipe for discharging effluents from the cage, preheating the catalyst bed reactor by temporarily connecting the heating elements to a power supply unit external to the device until the catalyst bed reactor reaches a temperature sufficient to trigger a reaction of catalytic oxidation of the polluting substances in the gaseous effluents, then disconnecting the heating elements from the power supply unit, then cleaning the gaseous effluents by establishing a permanent circulation of the gaseous effluents to be cleaned through the ring, while rotating the ring with respect to the cage, and thermally controlling an autothermal reaction through controlled injection of a fuel and/or of at least one non-inflammable coolant into the device.
Dependencies are inferred from the claim text.