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Siemens CD 3002 Manual
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LDS 3000 Air blower Purging of CD 3002 using air blower11. Purging of CD 3002 using air blower1.1 GeneralIn application with high dust load and ash build-up in front of the lens inCD 3002 very high purging flows may be necessary. For these applica-tions an air blower producing flow rates in the 1000 ltr/min. range can beused. A typical application where this is preferable is in MWI (municipalwaste incineration). This manual relates to the installation and operationof the air blower set supplied by Siemens Laser Analytics.1.2 InstallationAn important issue is the counter pressure build up at the output of theair blower. It is vital to keep this as low as possible since the air flow isdecreasing when the counter pressure increases – se the graph below.Flow rate vs counter pressure.A large cross section of the air blower output and a short tube is param-eters that affects this in a positive direction. If a long tube must be used– make sure it has a large diameter. The following diagram illustrates theflow changes with different output tubes and may serve as a guide whenthe set-up is designed. If the air blower is serving two sensors it is veryimportant that the lengths of the tubes to the two sensors are equal. Thisensures that the air is split 50/50 between the two.0 200 400 600 800 100004080120160200Flow rate [ltr/min]Counter pressure [mbar]Flow rate vs counter pressure |
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