Solvent Recovery Plant ASC-500 50 kW
Functional description of the solvent recovery plant
The ASC-500 50 kW is an extremely comfortable vacuum solvent recovery plant from the professional ASC series. It has a modern integrated steam heating.
Heating of solvent recovery plant ASC-500
A special feature of the solvent recovery plant is the conical stainless steel distillation vessel or boiler, in which the shell surface is heated with steam. The solvent recovery plant heating steam in the double jacket transfers the heat extremely quickly to the solvent. At the same time, high distillation performance is achieved with a small boiler volume.
The solvent recovery plant has a clever design. Only one electrical connection is required for the integrated steam heating of the solvent recovery plant. A high performance liquid ring vacuum pump conveys the dirt into the solvent recovery plant and guarantees continuous 24 hour operation. During automatic distillation in the recovery plant, the evaporated amount of solvent is automatically replenished by the addition of dirt into the solvent recovery plant. This automatic continuous distillation mode can be set by timer.
Solvent recovery plant safety function:
If the dirt tank of the customer contains no more solvent, the solvent recovery plant receive a signal and automatically switches to "sump distillation". The continuous filling into the solvent recovery plant is stopped and the amount of solvent still present in the solvent recovery plant boiler is evaporated until the dirt becomes a thick concentrate. The solvent recovery plant then switches off and is ready for manual or fully automatic emptying.
The distilled or purified solvent flows continuously from the solvent recovery plant into the customer's on-site tank.
Perfect scraper system in ASC-500 solvent recovery plant
A further feature of the ASC solvent recovery plant is a slow-running scraper agitator with automatically adjusting doctor blade made of PTFE. This unique doctor blade (scraper) system has been further developed over 30 years and is now used in our solvent recovery plant for its robustness and cleaning efficiency. Two strong scrapers made of PTFE optimally clean the conical evaporator vessel in the solvent recovery plant and do not have to be readjusted. The doctor blades or scrapers clean the boiler wall over the entire filling area and not only at the boiler bottom like other solvent recovery plants.
The contact pressure on the steep walls is optimal and large enough to prevent the build-up of deposits in solvent recovery plant.
Flexible process in solvent recovery plant and adaptation to customer requirements:
The entire solvent distillation process for the solvent recovery plant is controlled by a SIEMENS SPS S7 1200. If the local requirements of the customer change due to tanks, pumps or processes, the Siemens control system can be reprogrammed at any time and adapted to customer requirements for the solvent recovery plant integration. And this in national language bps. Chinese, Russian etc.! The OFRU solvent recovery plant is multi-language ready.
Discharging the distillation residues in ASC solvent recovery plant:
The viscous solvent residues in the solvent recovery plant are emptied by gravity via a slide valve at the lowest point of the conically round boiler. The solvent recovery plant can then be automatically refilled with contaminated solvent. A new continuous distillation process of solvents begins.
Differences to Solvent Recovery Plant ASC-500 37 kW
- Heating capacity of the solvent recovery plant: 50 kW
- Fill level control by Endress Hauser Oscillating fork measuring System (overfill protection and constant fill level)
- Individual fault messages and detailed fault report
- Large heat exchanger
- More distillation capacity
| Technical data | ASC-500 50 kW kW with vacuum |
| Boiler vessel volume | 500 l |
| Constant filling volume, level controlled | ~ 250 l |
| Distillation capacity approx. | 100-220 l/hr* |
| Heating up time approx. | 0.5 hr* |
| Heating temperature | Max. 180 °C |
| Vacuum abs. | Max. 50 mbar |
| Voltage | 380-410 V / 50 Hz / 3 Ph + N |
| Power consumption steam heating | 50 kW |
| Power consumption vacuum unit | 1,1 kW |
| Compressed air consumption approx. | 6 bar, Max. 50 l/min. |
| Useful cooling capacity demand approx. | 40 kW |
| Cooling water consumption (8-12° C) approx. | 4.0 m³/hr |
| Width x depth x height approx. | 2.20 x 1.10 x 3.20 (always depending on configuration and changes) |
| Weight approx. | ~ 1,500 kg |
- All parts in contact with the product are almost exclusively made of stainless steel
- Automatic and continuous filling with contaminated solvents
- Level level is kept constant, thus largely constant distillation performance
- Rotated conical stainless steel distillation vessel: Simple and complete emptying of the boiler by gravity and scraper insert.
- Perfect scraper system: scraper scrapes off the inside wall of the boiler, no readjustment necessary. Optimum tank cleaning guaranteed
- Modern steam heating integrated: Solvent heats up much faster than with thermal oil systems, No oil change more necessary = saves maintenance costs, no more encrusted heating elements, always constant heating output, no oil sludge in the system, no more boiler corrosion due to humidity in the thermal oil jacket
- Water cooling: Optimum condensation of the solvent vapours even at high ambient temperatures
- Switch cabinet IP54, with digital SIEMENS control S7 1200
- Switch cabinet with SIEMENS HMI colour TFT comfort panel with touch operation and process overview
- Automatic mode
- Auto-Stop: If dirty barrel or storage tank is empty, if temperature errors occur, if there is no water in the double jacket, if there is no cooling water available
- Constructed according to the latest European directives: Operational safety at a high level
* Note for this solvent recovery plant: Depending on type and composition of solvent, type and proportion of contamination, heating temperature, vacuum, cooling water pressure and temperature, boiling behaviour. **Accompanying depot agent according to Directive 2014/34/EU
Typical distillation performance for this solvent recovery plant, after practical experience:
Ethanol / ethyl acetate in flexo printing: approx. 90 litres / hour.* If in the solvent recovery plant nitrocellulosic solvents or inks are used, for safety reasons heating is only carried out at max. 105 °C.
Solvent in printing plate production: Approx. 120 litres / hour*
Ink, varnish, color, paint and coating industry: Approx. 100-250 litres / hour.*