FLK Gas Sampling System - MPIP - Free

SQ250 FLK Gas Sampling System
1.5 Mode of operation
It is the rigid multi-pipe construction of the gas sampling probe that mainly guarantees a low level of service and
maintenance. The cooling pipe, coolant return pipes and gas sampling probe can be quickly replaced using flange joints that
are simple to release. The spatial separation of the gas sampling probe and the dedusting filter also have advantages for
service and repair work.
The somewhat unfavorable conditions during flue gas analysis in cement production demand special measures in the
maintenance, repair and monitoring of all parts of gas analysis equipment. With this gas sampling system it was assumed that
higher availability and reliability necessarily imply preventive, automatic maintenance. If dust build-up and baked-on deposits
cannot be avoided, they must be detected on time by comprehensive monitoring devices and then effectively remedied.
Baked-on deposits on the gas sampling probe are largely prevented by the high operating temperatures of up to 220° C.
Special coolant ensures these high temperatures. In order that no temperature differences can arise between the probe and the
filter, the filter is electrically heated; baked-on products in the filter space and silting up of the filter pores are therefore
prevented.
The motor-driven retraction device is another method of increasing the reliability and availability of the gas sampling system.
It ensures quick and easy erection and removal of the gas sampling probe in the kiln inlet and protects it from any overheating
if the cooling system fails.
The numerous automatic functions are provided by a versatile, high performance programmable logic controller.
A specially developed program satisfies these requirements.
• During insertion and retraction the gas sampling probe can be cleaned internally and externally by compressed air via the
built-in pipe.
• It activates, either manually or automatically when required, the cleaning of the dedusting filter and the gas extraction
pipe using compressed air.
• It monitors the most important processes in the gas sampling, provides corresponding messages and initiates suitable
countermeasures in the event of a fault.
The user defines the type and scope of the countermeasures with exact parameters. This means, for example, that he can
parameterize when and how often a cleaning program is to be started, how long the cleaning is to last or under which
conditions the gas sampling probe is to be withdrawn from the kiln. The programmable logic controller and monitoring unit
therefore provides an effective method of damage prevention.
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