Cement production system

Patent metadata

Field	Value
Publication number	US-9724843-B2
Application number	US-201314440752-A
Country	US
Kind code	B2
Filing date	Nov 5, 2013
Priority date	Nov 7, 2012
Publication date	Aug 8, 2017
Grant date	Aug 8, 2017

Abstract

The invention relates to a cement production system with a preheater for preheating the cement raw meal, a calciner for pre-calcining the preheated cement raw meal, and a rotary kiln for firing the pre-calcined cement raw meal, wherein the calciner has a riser pipe through which exhaust gases from the rotary kiln flow. The gas offtake probe is arranged in a calciner nozzle, which is formed by a nozzle-like constricted section of the riser pipe, wherein the gas offtake probe is arranged flush on the calciner nozzle of the riser pipe.

First claim

The invention claimed is:

1. A cement production plant comprising:
a preheater for preheating cement raw meal,
a calciner for precalcining the preheated cement raw meal,
a rotary tube furnace for firing the precalcined cement raw meal,
wherein the calciner has a riser tube line having a calciner nozzle comprising an exterior wall and an interior wall and through which exhaust gases from the rotary tube furnace flow,
wherein the calciner nozzle is formed by a section of the riser tube line which is constricted into a nozzle form, and
wherein at least one gas offtake probe which is arranged flush on the interior wall of the calciner nozzle of the riser tube line at a point or plane of smallest cross section of the riser tube line.

2. The cement production plant as claimed in claim 1 , wherein the gas offtake probe opens horizontally into the riser tube line.

3. The cement production plant as claimed in claim 1 , wherein the gas offtake probe opens obliquely into the riser tube line.

4. The cement production plant as claimed in claim 1 , wherein the gas offtake probe is part of a gas offtake apparatus which has at least one filter unit.

5. The cement production plant as claimed in claim 4 , wherein the filter unit is arranged axially or radially relative to the gas offtake probe.

6. The cement production plant as claimed in claim 1 , wherein the gas offtake probe is part of a gas offtake apparatus which has a cooling system for cooling the gas offtake probe.

7. The cement production plant as claimed in claim 1 , wherein the gas offtake probe is equipped with a gas offtake port which tapers conically in the direction of the riser tube line, such that a first radius of the gas offtake port located at the interior wall of the calciner nozzle is smaller than a second radius of the gas offtake port located at the exterior wall of the calciner nozzle.

8. The cement production plant as claimed in claim 1 , wherein at least two gas offtake probes which are joined flush to the riser tube line are provided on the calciner nozzle.

9. The cement production plant as claimed in claim 8 , wherein the two gas offtake probes are connected to a joint gas analysis instrument.

Assignees

• Thyssenkrupp Ind Solutions Ag

Inventors

• Leuer Alfons
• Bredemeier Heinz
• Streffing Michael
• Adler Klaus

Classifications

• F27D2019/0015

  Monitoring the composition of the exhaust gases or of one of its components · CPC title

• F27D19/00

  Arrangements of controlling devices · CPC title

• G01N2001/2235

  over a melt, e.g. furnace · CPC title

• B28B15/00 Primary

  General arrangement or layout of plant {; Industrial outlines or plant installations} · CPC title

• F27B7/42 Primary

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