Installation for the thermal treatment of dispersible raw material, and method for operating such an installation

Patent metadata

Field	Value
Publication number	US-2023175778-A1
Application number	US-202117923176-A
Country	US
Kind code	A1
Filing date	May 4, 2021
Priority date	May 5, 2020
Publication date	Jun 8, 2023
Grant date	—

Abstract

An installation for thermal treatment of free-floating raw material, in particular cement raw meal and/or mineral products, may include a riser line through which hot gases can flow. The riser line has at least one fuel inlet for introducing fuel into the riser line. The riser line has at least one raw meal inlet for introducing raw meal into the riser line, which raw meal inlet is arranged upstream of the fuel inlet in a flow direction of gas inside the riser line. Further, a method for thermal treatment of free-floating raw material may involve introducing fuel via a fuel inlet into a riser line for guiding hot gases and introducing raw meal into the riser line. The raw meal is introduced into the riser line upstream of the fuel inlet in the flow direction.

First claim

1 .- 16 . (canceled)

17 . An installation for thermal treatment of free-floating raw material including at least one of cement raw meal or mineral products, the installation comprising a riser line through which hot gases can flow, wherein the riser line includes:
a fuel inlet for introducing fuel into the riser line; a raw meal inlet for introducing raw meal into the riser line, the raw meal inlet being arranged upstream of the fuel inlet in a flow direction of gas inside the riser line; and an inert gas inlet connected to an inert gas source for introducing inert gas into the riser line.

18 . The installation of claim 17 wherein the riser line includes at least two treatment regions arranged in succession in the flow direction, each of the at least two treatment regions having a different diameter, wherein an upstream treatment region of the at least two treatment regions includes the raw meal inlet for introducing the raw meal into the upstream treatment region of the riser line.

19 . The installation of claim 18 wherein the riser line includes a cross-sectional constriction between the at least two treatment regions, the cross-sectional constriction having a smaller diameter than either of the at least two treatment regions.

20 . The installation of claim 18 wherein the fuel inlet is arranged downstream of the upstream treatment region.

21 . The installation of claim 18 wherein the riser line includes a first cross-sectional constriction between the at least two treatment regions, the first cross-sectional constriction having a smaller diameter than either of the at least two treatment regions, wherein the fuel inlet is arranged downstream of the upstream treatment region, wherein the riser line includes a second cross-sectional construction that is upstream of the upstream treatment region.

22 . The installation of claim 18 wherein the raw meal inlet is a first raw meal inlet, wherein the riser line includes a second raw meal inlet for introducing raw meal into the riser line, wherein each of the first and second raw meal inlets is arranged in a different one of the at least two treatment regions.

23 . The installation of claim 17 wherein the fuel inlet includes fuel lines that extend in radial directions of the riser line, the fuel lines extending through a wall of the riser line into the riser line, wherein the raw meal inlet includes raw meal lines that extend in radial directions of the riser line, the raw meal lines extending through the wall of the riser line into the riser line.

24 . The installation of claim 17 wherein the fuel inlet includes a fuel line that extends in a radial direction of the riser line, the fuel line extending through a wall of the riser line into the riser line, wherein the raw meal inlet includes a raw meal line that extends in a radial direction of the riser line, the raw meal line extending through the wall of the riser line into the riser line.

25 . The installation of claim 24 wherein the fuel line extends at an angle of 0° to ±50° relative to the raw meal line into the riser line.

26 . The installation of claim 17 comprising:
a temperature measuring unit that is disposed in the riser line and is configured to ascertain a temperature inside the riser line; and
a regulating unit that is connected to the temperature measuring unit to transmit the temperature that is ascertained, wherein the regulating unit is configured to regulate an amount of at least one of raw meal, inert gas, or fuel into the riser line based on the temperature that is ascertained.

27 . A method for thermal treatment of free-floating raw material including at least one of cement raw meal or mineral products, the method comprising:
introducing fuel via a fuel inlet into a riser line for guiding hot gases; introducing raw meal into the riser line, wherein the raw meal is introduced into the riser line upstream of the fuel inlet in a flow direction of gas; and introducing inert gas into the riser line.

28 . The method of claim 27 wherein the riser line includes at least two treatment regions that are arranged in succession in the flow direction, wherein each of the at least two treatment regions has a different diameter, wherein the raw meal is introduced into an upstream treatment region of the at least two treatment regions in the flow direction.

29 . The method of claim 27 comprising:
ascertaining a temperature with a temperature measuring unit inside the riser line; and
regulating an amount of at least one of raw meal, inert gas, or fuel in the riser line based on the temperature that is ascertained.

30 . The method of claim 27 wherein the fuel inlet is an upstream fuel inlet, wherein fuel is introduced into the riser line via the upstream fuel inlet and a downstream fuel inlet, with the upstream and downstream fuel inlets being arranged in succession in the flow direction, wherein more fuel is introduced at the upstream fuel inlet than at the downstream fuel inlet.

31 . The method of claim 28 wherein an amount of raw meal that is introduced into the upstream treatment region corresponds to 20% to 60% of a total amount of raw meal introduced into the riser line.

Assignees

• Thyssenkrupp Ind Solutions Ag

Inventors

• Dinkova Anna Ivanova
• Willms Eike
• Lemke Jost
• Lampe Karl

Classifications

• F27B7/3205

  Charging · CPC title

• F27B7/36 Primary

  Arrangements of air or gas supply devices · CPC title

• F27B7/42 Primary

  Arrangement of controlling, monitoring, alarm or like devices · CPC title

• C04B7/434

  Preheating with addition of fuel, e.g. calcining · CPC title

• C04B7/47

  Cooling {; Waste heat management} · CPC title