FLK Gas Sampling System - MPIP - Free

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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. Copyright ® SIEMENS Page 6 04/04
SQ250 FLK Gas Sampling System The different design versions of the system also contribute to optimized operation. Figure 2 shows the circuits for the analysis gas and for the compressed air for cleaning the gas sampling pipe and the dedusting filter. Figure 3 shows the coolant circuit for cooling the gas sampling probe. Fig. 2 Gas circuit for sampling device Legends: 1 Gas sampling probe 2 Gas sampling opening 3 Coolant connection 4 Retraction device 5 Dedusting filter 6 Valve combination 7 Control cabinet for controller 8 Installation pipe 9 Valve for blowing dust return 10 Local control box 11 Flash light for process warning 12 Horn for process warning 13 Emergency-stop button 14 Control Center 71 Compressed air for purging 76 Condensate preseparator probe 77 Low-pressure switch 72 Compressed air for purging 78 Filter and Water separator filter 79 Compressed air control valve 73 Compressed air inlet 80 Condensate output 74 Dust-free measurement gas 81 Measuring gas line to analyzer cabinet 75 Four-way motorized valve 82 Dust-laden measuring gas 83 Control cable 84 Control cable for pump controller and fault signals to analyzer cabinet 85 Control cable for retraction device 86 Filter supply cable The process gas to be analyzed is extracted by the gas sampling probe, cleaned in the electrically heated dedusting filter and passed to the gas analyzer device. Only a part of the gas flow with a particularly low dust content is extracted due to the specially formed sampling opening at the tip of the probe. Copyright ® SIEMENS Page 7 04/04
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Siemens SQ253 Valve Combination Cop
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Siemens SQ253 Valve Combination Con
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Siemens SQ253 Valve Combination 1.3
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SQ253 Valve Combination 1.5 Mode of
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SQ253 Valve Combination 2. Installa
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SQ253 Valve Combination 4.4 Condens
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SQ253 Valve Combination 4.6 Low-pre
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SQ253 Valve Combination 4.8.2 Clean
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SQ254 Heat Exchanger Note: We would
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SQ254 Heat Exchanger 1.4 Function d
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SQ254 Heat Exchanger 2. Installatio
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SQ254 Heat Exchanger 3.3 Adjustment
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Siemens Copyright ® SIEMENS Page 8
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Siemens SQ255 Control Unit Note: We
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Siemens SQ255 Control Unit 1.4 Cons
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SQ255 Control Unit 2. Installation
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SQ256 Retraction Device Note: We wo
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SQ256 Retraction Device 1.4 Constru
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SQ256 Retraction Device Manufacture
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