econ industries GmbH u. Co. KG

econ industries specialises in the design, construction and installation of sophisticated plants for the treatment of all types of industrial waste.

Our experience with a variety of products, including pasty, dusty, and flammable substances, allows econ industries to design process technology for a large variety of industrial applications. We also possess the flexibility to act as an engineering services company, a process equipment company, or as a turn-key supplier.

For econ industries, partnership is more than a word - it's a commitment! Therefore, econ industries is committed meeting your expectations.
We understand that our success is based on the success of our partners - let us both be successful!

Greatest benefits

• Efficient indirect heat transfer for drying process, energy efficiency > 80 % 
• Emission and dust free system via enclosed treatment of exhaust vapours and solids
• ATEX certified technology, approved by German TÜV
• Design standards according to EN, ASME, GOST-R or individual specifications available
• 7,000 operating hours per year guaranteed, 24 hours operation, availability > 90%
• Optional solidification after thermal treatment for non-volatile contaminants

Working principle

At the core of the econ VacuDry process is a specially designed dryer chamber which uses heat and controlled vacuum to evaporate volatile contaminants. The batch-wise working indirectly heated thermal desorption process treats solids contaminated with mercury, hydrocarbons, solvents and other hazardous substances at temperatures above their boiling points. To heat up the dryer a temperature resistant synthetic oil is circulated inside the dryer´s heating jacket and its central shaft. The rotating shaft ensures intensive mixing during the process, guarantees a highly-efficient heat transfer to the product and allows short, energy-saving batch times. After vaporisation the exhaust stream is led through a highly effective vapour filter unit to prevent dust merging with the vapours. Specially designed heat exchangers separate the vaporised contaminants from the main vapour stream by condensation using indirect cooling. For the individual recovery of valuable substances gradual heating assures their defined separation. The remaining vapour passes through a powerful vacuum unit and is cleaned of residual contaminants via an active charcoal filter before finally being led off into the atmosphere. The treated, dried solid residues – usually > 99 % pure minerals - are cooled and remoistened. An additional small mixer is used for later re-moistening or solidification where required. Various feeding systems are available, depending on the consistency and type of the input materials – varying from liquid sludge up to soils/debris of all types of contamination levels.

Key Facts

• Heating system: Thermal oil with temperatures up to 400 °C
• Fired by: Fuel oil, diesel, natural gas, biofuels, eletricity
• Dryer chamber vacuum: < 50 mbar absolute pressure
• Available evaporation ranges: Boiling points up to 450 °C are achieved under vacuum
• Plant design: Fixed or mobile installation, 0.5 … > 10 t/h throughput capacity
• Additional operating resources: Electricity, nitrogen, compressed air, cooling/chilled water