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US 12,162,022 B2Granted
Process for recycling a bituminous waste product such as a bituminous waste membrane product
AssigneeS.A. Imperbel N.V.
InventorsGuillaume Moreels, Julien Dormal, Caroline Martin, Koen Sneiders, Patrick Cogneau
Life of this patent
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Abstract
An object of the instant application is to provide a process of recycling a bituminous product such as a waste bituminous membrane product optionally containing reinforcement layers comprising grinding and melting steps.
Claims15
A process of recycling a bituminous product or a waste bituminous membrane product containing reinforcement layers, the process comprising the steps of:
- collecting waste bituminous products, waste bituminous membrane products containing bituminous layers and reinforcement layers;
- sorting the waste bituminous products in a series of n waste bituminous product batches;
- a first grinding of each batch of said series of n waste bituminous product batches in a knife shredder;
- reducing the size of each said first batch in a first shredded batch to have a mean particle size distribution between 20 and 50 cm;
- a second grinding of each first shredded batch in a rotor granulator;
- reducing each said first shredded batch in a size to a first crushed batch having a mean particle size distribution between 5 and 25 cm;
- a third grinding of each first crushed batch in a rotor granulator;
- reducing each said first crushed batch in a size to a first ground batch having a mean particle size distribution between 20 and 50 mm;
- conveying each said first ground batch on a vibrating sieve;
- collecting each second ground batch, with each said first ground batch depleted from dust and particles having a particle size d100 lower than 8 mm;
- separating metal pieces from non-metal pieces by application of Foucault current to each second ground batch;
- and
- collecting each third ground batch, with each said second ground batch depleted from the metal pieces;
- and
- introducing the at least one third ground batch into a recycling unit having at least a rotor and a stator and a micronization chamber;
- heating and melting said third ground batch by a shear strength upon operation of the stator, the rotor and the micronization chamber;
- and
- collecting a melted product.
15 more elements
A recycling plant for recycling a waste bituminous product, a waste bituminous membrane product containing reinforcement material, the recycling plant comprising:
- (i) at least one recycling unit comprising a first rotor housed in a first stator, provided with a chamber delimited by an external wall of the first rotor, wherein the chamber is a micronization chamber formed by a recess arranged in a counter-element mounted on the stator which is substantially cylindrical, which said micronization chamber comprises an adjuster organized to adjust the volume and/or shape of the chamber and wherein at least one scraper organized to scrape the external wall of the rotor is mounted downstream of the micronization chamber;
- (ii) a first grinder, including a knife shredder provided for grinding at least one batch of said series of n waste bituminous product batches in a first shredded batch having a mean particle size distribution comprised between 20 and 50 cm, said first grinder having a first inlet and a first exit;
- (iii) a second grinder such as a rotor granulator, provided for grinding at least one first shredded batch in a first crushed batch having a mean particle size distribution between 5 and 25 cm, said second grinder having a second inlet and a second exit, said second inlet being connected to said first exit at least by conveyor;
- (iv) a third grinder, including a rotor granulator provided for grinding at least first crushed batch in a first ground batch having a mean particle size distribution between 20 and 50 mm, said third grinder having a third inlet and a third exit, said third inlet being connect to said second exit at least by a conveyor;
- (v) a vibrating sieve provided to convey and sieve the first ground batch and to provide a second ground batch, being the first ground batch depleted from dust and particles having a particle size d100 lower than 8 mm;
- and
- (vi) a separator provided for separating metal pieces from non-metal pieces by application of Foucault current to said second ground batch and for producing a third ground batch, being said second ground batch depleted from the metal pieces, said separator being connected directly or indirectly to said recycling unit in order to feed said recycling unit with at least one third ground batch.
4 more elements
Dependencies are inferred from the claim text.