Filter damage monitoring in clean gas side - Case Study
Application
A coffee producer fi nishes coffee beans. During the handling process the beans are cleaned with water inside a tank.
After cleaning, the beans are dried in another tank with heat. The moist air that results from this process is extracted by a vacuum, fi ltered and returned to the heat exchanger.
The cleaning of the exhaust air is done by fi lter hoses. Thereby air is pressed through fabric hoses to fi lter existing dust particles. On the clean gas side of this fi lter the dust content should be monitored in case of a defect of the fi lter hoses, which results in an alarm.
This alarm notifi es the control room of a hose leak/break.
Process data
Customer: Coffee manufacturer (Germany)
Material: Coffee beans
Installation place: Clean gas side
No. of systems: 9 x Dusty sensor with trend converter
Solution
The Dusty was specifi cally developed to monitor clean sides after fi lters for broken-bag detection without delay.
It can be used in metal channels to detect dust particles in fl owing gas. In the described application, the Dusty measures the dust concentration on the clean gas side after a fi lter. Thereby fi lter breaks can be detected promptly and reliably. In addition to a relay contact located in the Dusty, an optional DIN-rail transmitter can be used to measure the dust concentration with a continuous 4-20 mA output signal.
Customer Benefit
- Filter break monitoring on clean gas side
- Usable in all clean gas and dust channels
- Trend monitoring is possible by 4-20 mA signal
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