US 9,914,663 B2Granted

Manufacturing facility for quicklime, and manufacturing facility and manufacturing process for slaked lime

AssigneeMitsubishi Materials Corporation

InventorsNaohiro Higuchi, Hirokazu Shima

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Abstract

A manufacturing facility for quicklime is provided, which can manufacture highly active quicklime by a simple manufacturing facility, and which can also separate and recover, in a high concentration, CO2 gas generated at the time of manufacturing quicklime. The manufacturing facility for quicklime is configured by including: a regenerative calciner 11 which has a supply port 11a for supplying granular limestone C into the regenerative calciner 11, heating means capable of maintaining the temperature of the atmosphere in the regenerative calciner 11 at a temperature not less than the calcination temperature of the limestone, an exhaust pipe 15 connected to an upper part of the regenerative calciner 11 so as to discharge combustion exhaust gas of the heating means and CO2 gas generated by the calcination of limestone, and a discharge port 14 for taking out quicklime produced by the calcination; and a heat medium 16 which has a particle diameter larger than the particle diameter of the limestone and which is filled in the regenerative calciner 11.

Claims16

Dependent claims

A facility for manufacturing slaked lime, the facility comprising:

an apparatus for manufacturing quicklime, comprising
(i) a regenerative calciner comprising
a supply port configured to supply granular limestone into the regenerative calciner,
a heater configured to maintain temperature of an atmosphere in the regenerative calciner at a temperature not less than a calcination temperature of the granular limestone,
an exhaust pipe connected to an upper part of the regenerative calciner and configured to discharge combustion exhaust gas from the heater and CO2 gas generated by calcination of the granular limestone,
a three-way selector valve connected to the exhaust pipe such that the three-way selector valve is positioned between the upper part of the regenerative calciner and a heat exchanger, and
a discharge port configured to remove quicklime produced by the calcination therefrom, and
(ii) a heat medium having a particle diameter larger than a particle diameter of the granular limestone, the heat medium being filled in the regenerative calciner,
a slaking machine configured to produce slaked lime by supplying slaking water to quicklime manufactured in the apparatus;
an aging machine configured to age the slaked lime discharged from the slaking machine;
a drying machine configured to dry the slaked lime comprising water and aged in the aging machine;
and
the heat exchanger configured to supply, as a heat source of the drying machine, steam generated by heat exchange between water and the combustion exhaust gas or the CO2 gas discharged from the exhaust pipe of the apparatus,
wherein a first discharge side port of the three-way selector valve is connected to a first transfer pipe,
a second discharge side port of the three-way selector valve is connected to a second transfer pipe, and
the first transfer pipe and the second transfer pipe are connected to the heat exchanger and configured to respectively feed the combustion exhaust gas and the CO2 gas to the heat exchanger.

13 more elements

A facility for manufacturing slaked lime, the facility comprising:

an apparatus for manufacturing quicklime, comprising
(i) a regenerative calciner comprising
a supply port configured to supply granular limestone into the regenerative calciner,
a heater configured to maintain temperature of an atmosphere in the regenerative calciner at a temperature not less than a calcination temperature of the granular limestone,
an exhaust pipe connected to an upper part of the regenerative calciner and configured to discharge combustion exhaust gas from the heater and CO2 gas generated by calcination of the granular limestone,
a three-way selector valve connected to the exhaust pipe, and
a discharge port configured to remove quicklime produced by the calcination therefrom, and
(ii) a heat medium having a particle diameter larger than a particle diameter of the granular limestone, the heat medium being filled in the regenerative calciner;
a slaking machine configured to produce slaked lime by supplying slaking water to quicklime manufactured in the apparatus;
an aging machine configured to age the slaked lime discharged from the slaking machine;
a drying machine configured to dry the slaked lime comprising water and aged in the aging machine;
and
a heat exchanger configured to supply, as a heat source of the drying machine, steam generated by heat exchange between water and the combustion exhaust gas or the CO2 gas discharged from the exhaust pipe of the apparatus,
wherein a first discharge side port of the three-way selector valve is connected to a first transfer pipe,
a second discharge side port of the three-way selector valve is connected to a second transfer pipe, and
the first transfer pipe and the second transfer pipe are connected to the heat exchanger and configured to respectively feed the combustion exhaust gas and the CO2 gas to the heat exchanger.

13 more elements

Dependencies are inferred from the claim text.