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Stand und Entwicklung der kontinuierlichen gravimetrischen Dosierung von festen und flüssigen Stoffen
Author(s) -
Gericke Hermann
Publication year - 1986
Publication title -
chemie ingenieur technik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.365
H-Index - 36
eISSN - 1522-2640
pISSN - 0009-286X
DOI - 10.1002/cite.330580305
Subject(s) - gravimetric analysis , metering mode , process engineering , environmental science , engineering , mechanical engineering , chemistry , organic chemistry
State of the art in continuous feeding of solids and liquids . After defining the characteristics of continuous gravimetric feeding systems, the author lists the aims and reasons for the application of these methods in one‐ and multiple component systems. We can distinguish between gravimetric feeders with positive gross weighing and negative net weighing. The latter principle has advantages in operation, and is embodied in the weight‐loss weigh feeders. A synoptic chart of the various gravimetric feeder designs shows the nature and the method of acquisition of the controlled value and also classifies the fields of application as to feed range and material characteristics. When designing a feeder, the weight and volume of material flow, the characteristics of the weight resolver and of the metering device have to be considered. Latest developments of the principal components of weigh feeders are illustrated by examples, such as metering devices for solids with poor flow properties, combination of feeding and pneumatic conveying systems, headload compensation with weight‐loss weigh feeders, feeding with high instantaneous accuracy, gravimetric feeding of liquids at small feed rates, set point and ramp programming, and monitoring of the bulk density of the material.