Method and apparatus for the energy densification of a material in the form of divided solids, with a view to obtaining pyrolysis oils for energy purposes

摘要

A method and installation for energy densification of a material to obtain pyrolytic oils for energy. The method includes preconditioning the material by heating and drying to raise the material temperature close to 100° C. and a relative humidity not exceeding about 10%; pyrolyzing the material that is subsequently caused to flow through a substantially hermetic reactor containing at least one transfer screw or vibrating tube heated by the Joule effect, the material heated progressively in the range of 300° C. to 850° C., the electrical power passing through the transfer screw or the vibrating tube for providing heating regulated as a function of the material in order to obtain the desired temperature level during the transit time of the material through the reactor; extracting pyrolysis gas from a high portion of the reactor for rapid recondensation in a vertical condenser; and recovering pyrolytic oils from a low portion of the vertical condenser.

主权项

1. A method of energy densification for a material in the form of divided solids for the purpose of obtaining pyrolytic oils for energy purposes that have high net calorific values in a range of 4000 kilocalories per kilogram to 7000 kilocalories per kilograms, wherein the method comprises the following successive steps:
preconditioning the material by heating and drying in order to raise said material to a temperature close to 100° C. and to relative humidity not exceeding about 10% in a dedicated preconditioning device; pyrolyzing the material that is subsequently caused to flow through a substantially hermetic reactor containing at least one transfer screw or vibrating tube heated by the Joule effect, said reactor being distinct, independent and downstream from the dedicated preconditioning device, said material being heated progressively up to a temperature lying in the range 300° C. to 850° C. and with a fast temperature rise of several hundreds of degrees Celsius per second, the electrical power passing through the transfer screw or the vibrating tube for providing heating by the Joule effect being regulated as a function of the material in order to obtain the desired temperature level during the transit time of said material through said reactor; extracting pyrolysis gas from a high portion of the reactor for rapid condensation thereof in a vertical condenser; and recovering pyrolytic oils that have the high net calorific values from a low portion of the vertical condenser.