Kiln comprising a protective segment at the kiln outlet

Patent metadata

Field	Value
Publication number	US-2022018599-A1
Application number	US-201917295684-A
Country	US
Kind code	A1
Filing date	Nov 25, 2019
Priority date	Nov 30, 2018
Publication date	Jan 20, 2022
Grant date	—

Abstract

A kiln for firing cement clinker may include a tubular rotary drum that can be rotated about its central axis. The tubular rotary drum may have a discharge end at which the cement clinker leaves the kiln. A protective segment may be attached at the discharge end and may have an outward-facing wear surface and an inward-facing cooling surface. The kiln may include a cooling device for generating a cooling air flow that flows along the inward-facing cooling surface of the protective segment. The inward-facing cooling surface can include profile bodies that are pin-shaped. The profile bodies may be uniformly spaced apart, parallel to one another, and/or present over 20% to 60% of the inward-facing cooling surface.

First claim

1 .- 13 . (canceled)

14 . A kiln for firing cement clinker, the kiln comprising:
a tubular rotary drum that is rotatable about a central axis, wherein the tubular rotary drum includes a discharge end at which the cement clinker leaves the kiln; a protective segment that is attached at the discharge end and includes an outward-facing wear surface and an inward-facing cooling surface, wherein the inward-facing cooling surface includes profile bodies that are pin-shaped; and a cooling device for generating a cooling air flow that flows along the inward-facing cooling surface of the protective segment.

15 . The kiln of claim 14 wherein the profile bodies have a cross section that is angular, diamond-shaped, or rectangular.

16 . The kiln of claim 14 wherein the profile bodies have a cross section that is diamond-shaped or rectangular.

17 . The kiln of claim 14 wherein the profile bodies have a cross section that is round.

18 . The kiln of claim 14 wherein the profile bodies are uniformly spaced apart.

19 . The kiln of claim 14 wherein the profile bodies are parallel to one another.

20 . The kiln of claim 14 wherein the profile bodies occupy 20% to 60% of the inward-facing cooling surface.

21 . The kiln of claim 14 wherein a portion of the inward-facing cooling surface that includes the profile bodies is at least twice as large as a portion of the inward-facing cooling surface that does not include the profile bodies.

22 . The kiln of claim 14 wherein the profile bodies are spaced apart such that a gap is formed between each two adjoining profile bodies.

23 . The kiln of claim 22 wherein the gaps form an undulating profile.

24 . The kiln of claim 14 wherein some of the profile bodies have a first cross section that is round and some of the profile bodies have a second cross section that is angular, diamond shaped, or rectangular.

25 . The kiln of claim 14 wherein the cooling device includes a cooling channel for directing the cooling air flow in a direction of the inward-facing cooling surface.

26 . The kiln of claim 25 wherein the cooling device includes a guide element that divides the cooling channel into a supply channel for supplying the cooling air flow and a discharge channel for discharging heated cooling air.

27 . The kiln of claim 14 wherein the profile bodies have an angular cross section, wherein an edge of each profile body points in a direction of the cooling air flow.

Assignees

• Thyssenkrupp Ind Solutions Ag
• Thyssenkrupp Ag

Inventors

• Altfeld Jochen
• Könning Ludwig
• Rüther Thomas

Classifications

• F27D9/00

  Cooling of furnaces or of charges therein (casings, linings, walls or roofs incorporating cooling arrangements F27D1/12) · CPC title

• F27D2009/0008

  Ways to inject gases against surfaces · CPC title

• F27B7/224 Primary

  Discharge ends · CPC title