Method and system for recycling waste minerals
AssigneeTrinity Synergies A/S
InventorJesper Schmidt
Life of this patent
Estimating the term…
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 from waste minerals by heating a combustor by combusting waste fuel in the combustor;
- the method is comprising the steps:
- supplying waste minerals and waste fuel to the combustor, the waste mineral comprise mineral wool or cementitious material, which is recovered;
- the waste fuel comprise wood or any kind of waste material, which is at least partly burned;
- supplying oxygen to the combustor to obtain a preselected oxygen level,
- removing flue gas comprising carbon dioxide from the combustor for recycling,
- supplying recycled flue gas comprising carbon dioxide to the combustor,
- controlling the combustion temperature in the combustor to obtain the preselected process temperature by combusting waste fuel, and by controlling the amount of waste fuel and the recycled flue gas supplied to the combustor to obtain the preselected process temperature,
- removing residual material from the combustor, the residual material is the material remaining after combusting the waste minerals and the waste fuel, and
- recovering the recyclable product from the residual material.
A system for obtaining a recyclable product from waste minerals by heating a combustor by combusting waste fuel in the combustor, wherein the waste mineral comprise mineral wool or cementitious material, which is recovered;
- the waste fuel comprise wood or any kind of waste material, which is at least partly burned;
- the system comprises:
- a feeder arranged to supply waste minerals and the waste fuel to the combustor,
- an oxygen supply arranged to supply oxygen to the combustor to obtain a preselected oxygen level, an gas outlet arrangement to remove flue gas comprising carbon dioxide from the combustor for recycling,
- a gas inlet arrangement to supply recycled flue gas comprising carbon dioxide to the combustor,
- a controller arranged to control the combustion temperature in the combustor to obtain the preselected process temperature by combusting the waste fuel, and by controlling the amount of the waste fuel and the recycled flue gas supplied to the combustor to obtain the preselected process temperature, a removal arrangement arranged to remove residual material from the combustor, the residual material is the material remaining after combusting the waste minerals and the waste fuel,
- means arranged to recover the recyclable product from the residual material and a cooler to place the removed residual material and the cooler supplied with flue gas containing carbon dioxide, cooler comprises a conveyer, moving the residual material from the combustor and to the cooler, through the cooler and out of the cooler as cooled residual material, channeling the excess flue gas from the cooler to either the combustor or a steam boiler, and a gas treatment system including a pump to receive the cooled gas and return the cooled gas to the combustor or the steam boiler.
Dependencies are inferred from the claim text.