Apparatus and process for production of burnt lime or dolomite

Apparatus for production of burnt lime or dolomite, having:

• a shaft furnace having a preheating zone, a reaction zone, a separation zone and a cooling zone;
• a first feed apparatus for CO2 at a boundary of the separation zone to the reaction zone;
• a first removal apparatus at a boundary of the cooling zone to the separation zone;
• a second removal apparatus for CO2 at a start of the preheating zone;
• and
• at least one heating apparatus, wherein the at least one heating apparatus has a regenerator system;
• wherein
• the regenerator system has at least two regenerators, a preheater, a feed for fuel and a feed for fresh air;
• the second removal apparatus opens into the at least one heating apparatus;
• and
• the first feed apparatus is formed by the at least one heating apparatus for the shaft furnace,
• wherein the shaft furnace also has a third removal apparatus at a boundary of the reaction zone to the preheating zone and the third removal apparatus outside the shaft furnace opens into the second removal apparatus upstream of the at least one heating apparatus,
• wherein the second removal apparatus is connected directly to the first feed apparatus via a shortcut conduit upstream of a point at which the third removal apparatus opens into it.