Method and an apparatus for making a mineral melt
AssigneeRockwool International A/S
InventorsLars Bollund, Lars Elmekilde Hansen
Life of this patent
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Abstract
An apparatus for the production of a mineral melt burns combustible material in the presence of inorganic material to form a melt. The apparatus includes a circulating combustion chamber which receives a fuel, pre-heated mineral material and a combustion gas, melts the mineral material and generates exhaust gases which are separated from the melt. The gases pass through an exhaust pipe to a conduit of a heat exchange system. The apparatus includes a quenching hood for quenching the exhaust gases by drafting a cooling fluid, such as ambient air, into the flow of exhaust gases around the exhaust pipe, and wherein the exhaust gases exit the exhaust pipe inside the hood.
Claims12
A method of making a mineral melt, the method comprising the steps of:
- providing a circulating combustion chamber;
- injecting fuel, particulate mineral material and combustion gas into the circulating combustion chamber;
- combusting the fuel in the circulating combustion chamber thereby melting the mineral material to form a mineral melt and generating exhaust gases;
- separating the exhaust gases from the mineral melt, collecting the mineral melt and passing the exhaust gases upwards through an exhaust pipe to a conduit of a heat exchange system;
- and
- quenching the exhaust gases before entering the conduit by drafting a cooling fluid into the flow of exhaust gases around the exhaust outlet, wherein the exhaust outlet extends upwards from the combustion chamber at a height of at least 2.5 times the inner diameter of the exhaust pipe and into a quenching hood so that the exhaust gases exit the exhaust pipe inside the hood.
An apparatus for the production of a mineral melt by burning combustible material in the presence of inorganic particulate material and thereby forming a melt, said apparatus comprising:
- a circulating combustion chamber for receiving a supply of a fuel, pre-heated mineral material and a combustion gas and combusting the fuel in the circulating combustion chamber thereby melting the mineral material to form a mineral melt and generating exhaust gases, wherein the apparatus is configured and operative so that the exhaust gases are separated from the mineral melt and the exhaust gases are passed upwards through an exhaust pipe to a conduit of a heat exchange system;
- and
- quenching means for quenching the exhaust gases at the exhaust pipe,
- characterised in that
- the quenching means comprises a quenching hood for quenching the exhaust gases before entering the conduit by drafting a cooling fluid into the flow of exhaust gases around the exhaust outlet, and wherein the exhaust pipe extends upwards from the combustion chamber at a height of at least 2.5 times the inner diameter of the exhaust pipe and into the quenching hood so that the exhaust gases exits the exhaust pipe inside the hood.
Dependencies are inferred from the claim text.