Method and system for recycling waste minerals
AssigneeTrinity Synergies A/S
InventorJesper SCHMIDT
Life of this patent
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Abstract
The invention relates to a method and a system for obtaining a recyclable product from waste minerals by heating the mineral waste in a combustor by combusting waste fuel in a closed loop combustion process and treating the mineral waste with high levels of oxygen and/or carbon dioxide. A mixture of waste minerals for recycling and waste fuel for combustion is supplied to a combustor, also concentrated oxygen and recycled flue gas comprising carbon dioxide is supplied to the combustor for heating the mineral waste in an atmosphere of increased oxygen and carbon dioxide level to obtain a recyclable product from the waste minerals.
Claims17
A method for obtaining a recyclable product (4) from waste minerals (12, 32) by heating a combustor (10, 30) by combusting waste fuel (13, 33) in the combustor;
- the method is comprising the steps:
- supplying waste minerals (12, 32) and waste fuel (13, 33) to the combustor, waste mineral comprises mineral wool or cementitious material, which is recovered;
- waste fuel comprises wood or any kind of waste material, which is at least partly burned;
- supplying oxygen (15) to the combustor (10, 30) to obtain a preselected oxygen level,
- removing flue gas comprising carbon dioxide from the combustor (10, 30) for recycling,
- supplying recycled flue gas comprising carbon dioxide to the combustor (10, 30),
- controlling the combustion temperature in the combustor (10, 30) to obtain the preselected process temperature by combusting waste fuel (13, 33), and by controlling the amount of waste fuel (13, 33) and flue gas supplied to the combustor (10, 30) to obtain the preselected process temperature,
- removing residual material (6, 6′) from the combustor (10, 30), the residual material is the material remaining after combusting the waste minerals (12, 32) and the waste fuel (13, 33), and
- recovering the recyclable product (4) from the residual material (6, 6′).
A system for obtaining a recyclable product (4) from waste minerals (12, 32) by heating a combustor (10, 30) by combusting waste fuel (13, 33) in the combustor, wherein waste mineral comprises mineral wool or cementitious material, which is recovered;
- waste fuel comprises wood or any kind of waste material, which is at least partly burned;
- the system comprises:
- a feeder (11, 11′) arranged to supply waste minerals (12, 32) and waste fuel (13, 33) to the combustor,
- an oxygen supply (18) arranged to supply oxygen (15) to the combustor (10, 30) to obtain a preselected oxygen level,
- an gas outlet arrangement (20) to remove flue gas comprising carbon dioxide from the combustor (10, 30) for recycling,
- a gas inlet arrangement (19) to supply recycled flue gas comprising carbon dioxide to the combustor (10, 30),
- a controller (40) arranged to control the combustion temperature in the combustor (10, 30) to obtain the preselected process temperature by combusting waste fuel (13, 33), and by controlling the amount of waste fuel (13, 33) and flue gas supplied to the combustor (10, 30) to obtain the preselected process temperature,
- an removal arrangement (38) arranged to remove residual material (6, 6′) from the combustor (10, 30), the residual material is the material remaining after combusting the waste minerals (12, 32) and the waste fuel (13, 33), and
- means arranged to recover the recyclable product (4) from the residual material (6, 6′).
Dependencies are inferred from the claim text.