ABB SCK - Process Monitoring Devices

20 System Manual SCK Gas Sampling System 42/23-81 EN Rev. 4
Structure and function
The following diagram shows an overview of the SCK modules:
The individual modules of the gas sampling system have the following functions:
No. Designation Function
1
Retractor
 mechanical movement of the probe
 automatic removal of the probe when mal-
functions occur
2
Gas sampling probe
 sampling of sample gas from the process
3
Control cabinet
 control and monitoring
 error display
4
Cooling module
 cooling of the gas sampling probe
5
Compressed-air tank
(optional)
 back up probe movement if the on-site com-
pressed-air supply fails
The sampling system serves the purpose of continuous sampling of sample gas at
the measuring point, i.e. at the gas outlet of the rotary kiln or at the gas outlet of the
calcinator. The probe forms a unit with the pneumatic probe retractor. It is integrat-
ed in a closed cooling-water circuit with a heat exchanger (cooling module). The
retractor and probe can be controlled from the touchscreen on the control cabinet.
The sample gas is filtered in the probe and ducted into the sample gas line. Further
conditioning and analysis of the gas takes place in external equipment (not part of
the gas sampling system).
Illustration
Modules
Additional
explanations