Calcination apparatus and processes with improved co2 capture

Patent metadata

Field	Value
Publication number	US-2025313508-A1
Application number	US-202318865149-A
Country	US
Kind code	A1
Filing date	May 12, 2023
Priority date	May 12, 2022
Publication date	Oct 9, 2025
Grant date	—

Abstract

A calcination and cement production apparatus comprising a calciner configured to be heated by combustion of a carbon based fuel and a hydrogen peroxide oxidant composition is disclosed.

First claim

1 . A calcination apparatus comprising a calciner configured to be heated by combustion of a carbon based fuel and a hydrogen peroxide oxidant.

2 . The calcination apparatus as claimed in claim 1 , further comprising a boiler unit for evaporating and/or concentrating an aqueous hydrogen peroxide solution to produce a gaseous hydrogen peroxide oxidant.

3 . The calcination apparatus as claimed in claim 2 , wherein the boiler unit evaporates the aqueous hydrogen peroxide solution by heating.

4 . The calcination apparatus as claimed in claim 3 , wherein the boiler unit is heated by hot gases from the calciner, hot gas leaving a kiln, gas that is heated electrically or gas that is heated using any heating source.

5 . The calcination apparatus of claim 1 , further comprising a first heat exchanger configured to heat raw material to be fed to the calciner.

6 . The calcination apparatus as claimed in claim 5 , further comprising a second heat exchanger configured to cool a product material exiting the calciner and transfer heat to the first heat exchanger.

7 . An apparatus for lime (CaO) production, the apparatus comprising the calcination apparatus as claimed in claim 1 .

8 . An apparatus for cement clinker production, the apparatus comprising the calcination apparatus as claimed in claim 1 and a kiln configured to be heated by combustion of a carbon based fuel or a hydrogen-based fuel and a hydrogen peroxide oxidant composition.

9 . A system for mitigating carbon dioxide levels during the manufacture of lime or cement clinker, the system comprising the calcination apparatus as claimed in claim 1 .

10 . A process for calcining a raw material to produce a calcined product, the process comprising:
introducing the raw material to a calcination apparatus; and heating the raw material in the calcination apparatus using heat generated from combustion of a carbon based fuel and a hydrogen peroxide oxidant composition under conditions to produce the calcined product.

11 . The process as claimed in claim 10 , comprising evaporating and/or concentrating an aqueous hydrogen peroxide solution to produce a gaseous hydrogen peroxide oxidant.

12 . The process as claimed in claim 11 , comprising evaporating the aqueous hydrogen peroxide solution by heating.

13 . The process as claimed in claim 12 , comprising heating the aqueous hydrogen peroxide solution using hot gases from the calcination apparatus, hot gas leaving a kiln, gas that is heated electrically or gas that is heated using any heating source.

14 . The process as claimed in claim 10 , comprising heating the raw material prior to introduction to the calcination apparatus.

15 . The process as claimed in claim 14 , comprising heating the raw material using heat from the calcined product.

16 . The process as claimed in claim 10 , wherein the raw material is limestone and the conditions are selected to produce lime.

17 . The process as claimed in claim 16 , comprising evaporating an aqueous hydrogen peroxide solution to produce a gaseous hydrogen peroxide oxidant.

18 . The process as claimed in claim 17 , comprising evaporating and/or concentrating the aqueous hydrogen peroxide solution by heating.

19 . The process as claimed in claim 18 , comprising heating the aqueous hydrogen peroxide solution using hot gases from the calcination apparatus, hot gas leaving a kiln, gas that is heated electrically or gas that is heated using any heating source.

20 . The process as claimed in claim 16 , comprising heating the limestone prior to introduction to the calcination apparatus.

21 . The process as claimed in claim 20 , comprising heating the raw material using heat from the calcined product.

22 . The process as claimed in claim 10 , wherein the raw material is and the conditions are selected to produce a lime, the process further comprising:
heating the lime in a kiln to produce a clinker.

23 . The process as claimed in claim 22 , further comprising heating the lime in the kiln using heat generated from the combustion of the carbon based fuel and the hydrogen peroxide oxidant composition.

24 . The process as claimed in claim 22 , further comprising evaporating an aqueous hydrogen peroxide solution to produce a gaseous hydrogen peroxide oxidant.

25 . The process as claimed in claim 24 , comprising evaporating the aqueous hydrogen peroxide solution by heating.

26 . The process as claimed in claim 25 , comprising heating the aqueous hydrogen peroxide solution using hot gases from the calcination apparatus, hot gas leaving a kiln, gas that is heated electrically or gas that is heated using any heating source.

27 . The process as claimed in claim 22 , comprising heating the limestone prior to introduction to the calcination apparatus.

Assignees

• Univ Adelaide

Inventors

• Jafarian Mehdi
• Dally Bassam
• Nathan Graham Jerold

Classifications

• F27D13/00

  Apparatus for preheating charges; Arrangements for preheating charges · CPC title

• F27B15/14

  Arrangements of heating devices · CPC title

• C04B7/4407

  Treatment or selection of the fuel therefor, e.g. use of hazardous waste as secondary fuel (fuels in general C10L); Use of particular energy sources, e.g. waste hot gases from other processes · CPC title

• C04B7/367

  Avoiding or minimising carbon dioxide emissions · CPC title

• C01B15/013

  Separation; Purification; Concentration · CPC title