DECARBONATION PROCESS OF CARBONATED MATERIALS IN A MULTI-SHAFT VERTICAL KILN
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United States of America Patent
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Issued Date -
Aug 1, 2024
app pub date -
May 10, 2022
filing date -
May 11, 2021
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Abstract
The present disclosure discloses a decarbonation process of limestone and dolomitic limestone with CO2 recovery in a multi-shaft vertical kiln (MSVK) having three shafts with preheating, heating and cooling zones and a cross-over channel between each shaft. The method includes alternately heating carbonated materials by a combustion of a fuel with a comburent up to a temperature range in which carbon dioxide of the carbonated materials is released, the combustion of the fuel and the decarbonation generating an exhaust gas, the decarbonated materials being cooled in the cooling zones with cooling stream(s). Mixing between the exhaust gas and the one or more cooling streams is minimized. The decarbonated materials in two or three of the shafts are cooled with the cooling streams while a supply of the fuel in each shaft is stopped.
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