Model SRU-320 to SRU-3000 -Solvent Recycling and Vacuum Distillation Units
The filling of the units SRU-320 to SRU-3000 takes place fully automatic and is controlled by filling level regulation. At the end of the process the distillation residues are treated up to the desired residual solvent rate. Therefore, almost unattended 24-hour operation is possible. Instruments in the front panel inform about process pressure, solvent gas temperature and heating temperature of the unit. The discharging of the residues is done via the scraper system and the discharge slide damper. A manhole aperture with persistent O-ring seal on the top of the unit ensures operator convenience. Additionally the inspection glass of the manhole aperture allows visual observation of the process in every distillation phase.
The unit is equipped with switching cabinet and PLC control unit. The control unit ensures the desired process flow and monitors the compliance of all safety relevant parameters.
The vacuum unit reduces the boiling point of the solvent, avoiding thermal decomposition of the solvent. At the same time the energy consumption is decreased, solvent yield, performance and distillate quality as well as operation safety are greatly increased. Additionally the process under vacuum (and therefore the absence of oxygen) offers a improved explosion protection and a more favorable ex-zone classification.
Distillation unit
- Double walled, conical, vertical container
- Stirring-/ scraper system in -design with adjustable, nonarcing scraper system
- Cleaning-/ maintenance aperture in manhole version
- Safety closure with O-ring seal
- Manual drain valve (DN 200) with final position switch
- Pneumatic drain valve (DN 200) with electro-pneumatic -pilot valve and final position switch
- Pneumatic drain ball for automatic discharge of liquid residues
- Container interior electropolished
Vacuum unit
- Vacuum pump in -design
- Liquid ring vacuum pump, up to 35mbar, low maintenance
- High-performance chemistry diaphragm pump up to 10mbar
- Dry running high performance pump, up to 1mbar, low maintenance
Heating
- Heating in -design
- 1 to 3 stage, PID-controlled heat carrier heating
- Redundant temperature and heating monitoring
- Heat carrier: thermal oil
- 4 and multi-stage, PID-controlled heat carrier heating
- Heat carrier: hot water
- Heat carrier: steam
Frame variants
- Anodized, conductive aluminium profile frame only SRU-320
- Conductive, painted steel frame
- Powder coated, conductive steel frame
- Galvanized, conductive steel frame
- Conductive stainless steel frame
Safety/ system integration
- Explosion protection class EX II 3 G c IIA T3 (with inerting and suction)
- Inerting unit
- Suction hood at slide damper
- Explosion protection classe EX II 2 G c IIA T3 (without inerting and suction)
- External, single or double-walled container for fresh/ contaminated or mixed goods
- Feed station for mix-container
- Mobile and tiltable residue container
- Safety collecting drip pan according to WHG
- Integration in existing plants/ systems
Control system
- Fully automatic, PLC operated system
- Designed for monitoring free 24h operation
- Delay timer for night-/ weekend operation
- Including 15m cable loom (from unit to switching cabinet)
- At unit
- On-/ off-switch
- operation indicator lamp
- error indicator lamp
- Emergency stop palm button
- At switching cabinet
- Graphics display and operating terminal at cabinet door, monochromatic, 16 gradations, touchscreen
- Operation indicator lamp
- Error indicator lamp
- Emergency stop palm button
- PID-controller & display
- 50m cable loom
- At unit
- Graphics and operating terminal in -design
- At switching cabinet
- Graphics display and operating terminal with color display, touchscreen
Service
- 24 months warranty
- Pan-european 24h on-site service
- Express shipment of spare parts
- Up to 60 months warranty
- Remote maintenance through automation device or modem
- Support at the creating of the explosion protection document
Outstanding characteristics
- Wetted parts in stainless steel, including double jacket for heat carrier
- Stainless steel heat exchanger, welded
Conical, vertical distillation vessel
- Easy discharging and cleaning using gravitation and scraper system
Stirring and scraper system
- Prevention of incrustation at the inner surface of the vessel
- Optimized heat transfer inside the vessel
- Individually customized scraper provide optimal vessel cleaning without sparking
- Prepared for water cooling
- Emission minimized condensation of the solvent gases even at high ambient temperatures
Switching cabinet with electrical control system
- Continous process flow
- Monitoring/ compliance of the safety parameters
- Designed for 24h operation (minimized unit supervision)
Highest economic efficiency
- Amortisation normally < 1 year
- Low operational costs
- High recovery rate (up to 98%)
Automatic and continous operation
- No cooling phase of the unit
- No manual filling
Process optimization
- Production optimization through constant distillate quality
- Minimization of disposal costs
- Minimization of fresh goods purchase and storage costs
- Minimization of disposition and handling expenditures
Systems engineering according to european regulations
- Highest operational safety
