Rotary concentrator
Rotary concentrator / adsorber, RA
Rotary concentrator is used for production technologies combining high levels of exhaust gas and low concentration of VOC. Rotary concentrator provides concentration of VOC in 1:10 (1:15) ratio for the follow-up disposal using catalytic ot thermal technologies. Rotary concentrator is most commonly used in the areas of painting lines, plastics production, paper industry etc.
The rotary concentrator is based on zeolite filling set in the round shape constantly rotating and divided in several sections: process (300-310°), cooling (20-30°) and desorption (25-30°). Organic substances are caught on the surface thanks to intermolecular power, no chemical bond is operating here. Synthetic zeolites are more fire safe compared to active coal, particularly when using ketones as solvents.
Operation process of the rotary concentrator can be summerized in two phases:
1. Adsorpton phase:
2. Desorption phase:
Desorption air (gained by desorption ventilator) consists of detached part of the process off-gas (ca 1/10). The air is driven through the cooling sector of the rotary wheel, then is heated to the temperature of 120 – 180°C in the preheating exchanger and displaces organic pollutants from the zeolite filling on the way through the desorption sector of the rotary wheel. Concentration is ca 10 times increased compared to the original off-gas. The outgoing desorption air flow (ca 80 – 110°C) is then bound to be cleaned using thermal or catalytic methods.
Advantages of the rotary concentrator:
- Simplicity and sefety of its use,
- Low operating and service costs,
- Wide range of sizes suitable for any operation size (basic line covers air volume from 12.000 Nm3/h to 100.000 Nm3/h),
- Long life of adsorption material,
- Automatic operation.
Implementation – Adsorption with RA
