US 12,066,361 B2
Method for analyzing samples of a gas in a rotary cement kiln
Abderrahim Sabil, Holderbank (CH)
Assigned to HOLCIM TECHNOLOGY LTD, Zug (CH)
Appl. No. 17/294,092
Filed by HOLCIM TECHNOLOGY LTD, Zug (CH)
PCT Filed Nov. 4, 2019, PCT No. PCT/IB2019/059431
§ 371(c)(1), (2) Date May 14, 2021,
PCT Pub. No. WO2020/099977, PCT Pub. Date May 22, 2020.
Claims priority of application No. 18000901 (EP), filed on Nov. 15, 2018.
Prior Publication US 2022/0018739 A1, Jan. 20, 2022
Int. Cl. G01N 1/22 (2006.01); G01N 33/00 (2006.01); G01N 33/38 (2006.01)
CPC G01N 1/2226 (2013.01) [G01N 33/0029 (2013.01); G01N 33/0062 (2013.01); G01N 33/383 (2013.01); G01N 2001/2235 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A sampling device for analyzing samples of a gas in a rotary cement kiln by means of gas sampling probes, the sampling device comprising:
first and the second gas sampling probes that are each guided for movement between a retracted position and a sampling position by a respective drive, and
further comprising a control unit that is connected with the drives of the first and second gas sampling probes for controlling movement between the retracted position and the sampling position and for starting and stopping gas analysis, wherein the control unit is configured to control the first and the second gas sampling probes so that the first gas sampling probe is moved so as to reach the sampling position, wherein gas samples are withdrawn from the rotary cement kiln and analyzed by the first gas sampling probe being in the sampling position, while the second gas sampling probe is kept in the retracted position and is purged, whereupon the second gas sampling probe is moved so as to reach the sampling position, and the first gas sampling probe is moved from the sampling position to the retracted position and is purged, while gas samples are withdrawn from the kiln and analyzed by the second gas sampling probe being in the sampling position.