Waste pyrolysis process and installation having a preheating unit
AssigneeInstitut Francais du Petrole
InventorsGerard Martin, Eric Marty
Life of this patent
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Abstract
The present invention relates to an installation intended for the pyrolysis of solids, comprising a rotary furnace (1) inside which pyrolysis is achieved, and a means (21) for heating the rotary furnace. The installation according to the invention further comprises a means (2) for preheating the solids, located upstream from said furnace, said means (2) comprises at least two zones (2a, 2b) in which the solids are preheated at different temperatures and a gas extraction device (12) into which the pyrolysis gases are led after passing through at least one of said preheating zones (2a, 2b).
Claims9
An installation for the pyrolysis of waste solids comprising a rotary furnace in which pyrolysis of the waste solid is effected, means for heating the rotary furnace to pyrolysis temperatures, means for preheating the solids located upstream from said furnace, said means for preheating the solids comprising at least two zones in which the solids are preheated at different temperatures and a pyrolysis gas extraction device into which pyrolysis gases are introduced after flowing from the rotary furnace and through at least one of said preheating zones, a seal connection provided between said rotary furnace and said preheating means, means for causing the waste solids to pass through the preheating means and into the rotary furnace, and means for adjusting individually the temperature in each of the preheating zones and in said rotary furnace, and wherein said pyrolysis gas extraction device is located between two preheating zones so that the waste solids initially pass through one of the two preheating zones, through the pyrolysis gas extraction device, and then through the other of the two preheating zones prior to entering the rotary furnace.
Dependencies are inferred from the claim text.