Back to results
US 12,655,355 B2Granted
Char handling section and depolymerization process associated therewith
AssigneeBasell Poliolefine Italia S.r.l.
InventorsNicolò Arich de Finetti, Diego Brita, Antonio Mazzucco
Life of this patent
Estimating the term…
Abstract
A char handling section of a depolymerization plant for processing a char-containing liquid slurry generated during progressive depolymerization of plastic waste material.
Claims12
A char handling section comprising:
- a first jacketed chamber, provided with inlet conduit for feeding a char-containing slurry, a stirring system, and a conduit for withdrawing of a gaseous effluent;
- a first structure for withdrawing a concentrated slurry from the first jacketed chamber and conveying the concentrated slurry to a stripping chamber, removing a gaseous effluent from the concentrated slurry, and producing a drained char from the concentrated slurry, wherein the first structure is capable of maintaining the slurry in the same temperature range of first jacketed chamber and has a degassing system;
- the stripping chamber for receiving the drained char and removing gaseous effluent stripped out from the char, which is equipped with stirring a system, a char outlet, a gas inlet located in the bottom of the stripping chamber, and a gas outlet;
- a second structure for receiving the dry char of stripping chamber and conveying the dry char to a collecting chamber, wherein the second structure is capable of maintaining the char at a temperature ranging from 60 to 100° C.;
- and
- a collecting chamber for receiving the dry char, provided with a stirring system and an outlet for char disposal operated by a valve.
3 more elements
A process for handling a char-containing slurry comprising the steps of:
- introducing a char-containing slurry into a first jacketed chamber, provided with a stirring system, and operating the first jacketed chamber at a temperature ranging from 350 to 570° C., thereby producing and withdrawing a gaseous effluent and concentrating the slurry and
- withdrawing the concentrated slurry from the first jacketed chamber and conveying the concentrated slurry to a stripping chamber while maintaining the slurry in the same temperature range of the first jacketed chamber and removing a gaseous effluent from the concentrated slurry, thereby producing a drained char from the concentrated slurry;
- introducing the drained char into a stripping chamber, equipped with a stirring system, a char outlet, a gas inlet located in the bottom of the stripping chamber, and a gas outlet, thereby producing a dry char;
- feeding the dry char to a collecting chamber while maintaining the char at a temperature ranging from 60 to 100° C.;
- and
- discharging the dry char from the collecting chamber via a valve and disposing of the dry char.
3 more elements
Dependencies are inferred from the claim text.