H3-VH-6-D flender corporation Helical gear reducer H3

Flender/Flender Gear Units/Helical gear reducer H3

city andYefficiency verified. The evaluation software is suitable for on-line operation and was tested in measurlng series. The measurin series at relevant locations (metal degreasing plants,film manufacturing plants and fuel-hanjing facilities) were successfully conducted and evaluated for tetrachloroethy- lene, trichloroethylene, dichloromethane and benzene. The detection limits can be stated as follows: 8 ppbfortetrachloroethylene, 1 ppbfortrichloroethylene and 5 ppb for benzene.The scatter of the measurements (reproducibility) is [MCA]IO%. In addition to the four substances mentioned above, ethyl acetate was also evaluated in the measuring series for trichloroethy- lene, methanol in the measuring series for dichloromethane and total hydrocarbon in the mea- suring seriesfor benzene. In the case ofthe highlyvolatile chlorinated hydrocarbons, measure- ments ere performed both in the close vicinity of the plant and outside the buildings in the form % optical fence (fence-line monitoring), in order to determine the influence of relevant emission sources of chlorinated hydrocarbons on the immediate surroundings. 1 Duration: 0 0 9 - 3 0 9 0 VQ9 Subject: Collaborative project Measuring technique,for volatile organic hydrocarbons - Sub-project Process spectrometry with dynamic derivative and diode-laser measuring technique Research centre: Fraunhofer-lnstitut fur Physikalische MeBtechnik (IPM) HeidenhofstraBe 8, 7 1 Freiburg Government sponsorship: DM 4,0 0 Sponsorship ratio: 7 VO 1. Purpose of the project Within this partial projectthedynamicderivativespectrometry (DDS)) is to bedeveloped toa further degree It is to be applied for environmental protection as suitable measurement technique for process control to reduce the emission of hydrocarbons especially in medium-sized industrial plants The main interest was to further investigate the basic DDS principles for the development of measuring devices to control processes with emission of volat