Apparatus for pre-heating cement powder or similar materials

Claim 1

AN APPARATUS FOR PRE-HEATING CEMENT POWDER OR SIMILAR FINE-GRAINED, SOLID MATERIAL SUBSEQUENTLY CALCINED OR SINTERED IN A KILN, COMPRISING A HOLLOW SUBSTANTIALLY VERTICAL MAIN SHAFT DIVIDED INTO A PLURALITY OF SECTIONS, EACH OF SAID SECTIONS COMMUNICATING WITH THE ADJACENT SECTION, MEANS FOR CLOSING THE COMMUNICATION BETWEEN EACH PAIR OF ADJACENT SECTIONS, AT LEAST TWO CYCLONES DISPOSED VERTICALLY ABOVE EACH OTHER ADJACENT SAID HOLLOW MAIN SHAFT AND COORDINATED TO CORRESPONDING SECTIONS OF SAID HOLLOW MAIN SHAFT, TO PERMIT PARALLEL GAS FEEDING TO SAID CYCLONES, A KILN FEEDING EXHAUST GASES TO THE LOWERMOST OF SAID SECTIONS OF SAID HOLLOW MAIN SHAFT, AND PROVIDING AN UPWARD GAS STREAM TO FEED SELECTIVELY SAID EXHAUST GASES THROUGH SAID HOLLOW MAIN SHAFT, SAID CYCLONES ONLY, AND BOTH IN PART THROUGH SAID HOLLOW MAIN SHAFT AND IN PART THROUGH SAID CYCLONES, A FIRST EXHAUST GAS PIPE LEADING TANGENTIALLY FROM EACH OF SAID SECTIONS TO THE UPPER PORTION OF THE CORRESPONDING CYCLONE, A SECOND EXHAUST GAS PIPE LEADING CENTRALLY FROM EACH CYCLONE UPWARDLY TO THE ADJACENT UPPER SECTION OF SAID HOLLOW MAIN SHAFT, A BLOWER DISPOSED ON TOP OF SAID HOLLOW MAIN SHAFT, A THIRD EXHAUST GAS PIPE OF THE UPPERMOST OF SAID CYCLONES COMMUNICATING WITH SAID BLOWER, SAID HOLLOW MAIN SHAFT AND SAID FIRST SECOND AND THIRD EXHAUST GAS PIPES CONSTITUTING GAS FEEDING MEMBERS, A DUST EXHAUST PIPE EXTENDING FROM THE BOTTOM OF EACH OF SAID CYCLONES AND COMMUNICATING WITH SAID GAS FEEDING MEMBERS TO PROVIDE AN AT LEAST PARTLY DOWNWARD STREAM OF SAID FINE-GRAINED, SOLID MATERIAL IN A DOWNWARD COUNTER DIRECTION TO THAT OF GAS STREAM, AND A PIPE FEEDING SAID FINE-GRAINED, SOLID MATERIAL TO THE TOP PORTION OF SAID HOLLOW MAIN SHAFT.

Claim 2

AN APPARATUS FOR PRE-HEATING CEMENT POWDER OR SIMILAR FINE-GRAINED, SOLID MATERIAL SUBSEQUENTLY CALCINED OR SINTERED IN A KILN, COMPRISING A HOLLOW SUBSTANTIALLY VERTICAL MAIN SHAFT DIVIDED INTO A PLURALITY OF SECTIONS, EACH OF SAID SECTIONS COMMUNICATING WITH THE ADJACENT SECTION, MEANS FOR CLOSING THE COMMUNICATION BETWEEN EACH PAIR OF ADJACENT SECTIONS, AT LEAST TWO CYCLONES DISPOSED VERTICALLY ABOVE EACH OTHER ADJACENT SAID HOLLOW MAIN SHAFT AND COORDINATED TO CORRESPONDING SECTIONS OF SAID HOLLOW MAIN SHAFT, TO PERMIT PARALLEL GAS FEEDING TO SAID CYCLONES, A KILN FEEDING EXHAUST GASES TO THE LOWERMOST OF SAID SECTIONS OF SAID HOLLOW MAIN SHAFT, AND PROVIDING AN UPWARD GAS STREAM TO FEED SELECTIVELY SAID EXHAUST GASES THROUGH SAID HOLLOW MAIN SHAFT, SAID CYCLONES ONLY, AND BOTH IN PART THROUGH SAID HOLLOW MAIN SHAFT AND IN PART THROUGH SAID CYCLONES, A FIRST EXHAUST GAS PIPE LEADING TANGENTIALLY FROM EACH OF SAID SECTIONS TO THE UPPER PORTION OF THE CORRESPONDING CYCLONE, A SECOND EXHAUST GAS PIPE LEADING CENTRALLY FROM EACH CYCLONE UPWARDLY TO THE ADJACENT UPPER SECTION OF SAID HOLLOW MAIN SHAFT, A BLOWER DISPOSED ON TOP OF SAID HOLLOW MAIN SHAFT, A THIRD EXHAUST GAS PIPE OF THE UPPERMOST OF SAID CYCLONES COMMUNICATING WITH SAID BLOWER, SAID HOLLOW MAIN SHAFT AND SAID FIRST SECOND AND THIRD EXHAUST GAS PIPES CONSTITUTING GAS FEEDING MEMBERS, A DUST EXHAUST PIPE EXTENDING FROM THE BOTTOM OF EACH OF SAID CYCLONES AND COMMUNICATING WITH SAID GAS FEEDING MEMBERS TO PROVIDE AN AT LEAST PARTLY DOWNWARD STREAM OF SAID FINE-GRAINED, SOLID MATERIAL IN A DOWNWARD COUNTER DIRECTION TO THAT OF GAS STREAM, AND A PIPE FEEDING SAID FINE-GRAINED, SOLID MATERIAL TO THE TOP PORTION OF SAID HOLLOW MAIN SHAFT.