RotaClean automatic screen washer
The BOCHONOW RotaClean automatic screen washer is designed for vertical loading of screens, which will be washed by rotating spray bars from both sides.
The washing solvent is pumped in a closed loop by a high-performance centrifugal pump from the stainless steel washing tank. The high pump volume allows the use of powerful large face nozzles which results in an optimal cleaning performance. Solvents with a flashpoint of > 55° C (optional > 40°C) and a conductivity of > 10-9 S/m are requested. After the washing process, the screens will be placed manually in the integrated drying chamber. Rinsing of the screens with absolutely fresh solvent is available as an option.
The machine is robust, reliable and easy to service and meets all current security requirements and is approved following the ATEX guideline!
Standard basic configuration:
- closed washing chamber
- housing made of high grade stainless steel 1.4301 min. 2 mm thick,
- loading door with separate, resiliently assembled inner door for completely sealed washing chamber. Loading door will be secured by pneumatic door latch and lock, solvent will be sprayed only when door is closed.
- non-drip, slide-out master frame for multiple screen loading
- rotating, vertical spray bars with high-performance, large face jet nozzles from both sides. type examination category 1 according ATEX (for using in Zone 0)
- washing pump P1, volute casing centrifugal pump with high resistance face seal;
housing and impeller gray iron, shaft stainless steel; pressure apprx. 5 bar;
pump volume and power consumption depending on size; - wash tank is placed laterally below the washing chamber; including hinged lid; filling volume depending on size;
- by opening the hinged lid easy to access sieve filter between washing chamber and wash tank;
- optical liquid level indicator for Min.- and Max.-Level of the wash tank;
- drying chamber with 4 places
- exhauster V1, category 2 according ATEX, volume (m³/h) and power consumption depending on size
- pneumatically controlled switch-over flap K2, droplet separator F1, exhaust air installation ready till machine interface; air intake flap K1
- explosion proofed display and control elements on front side: ON/OFF switch washing, ON/OFF switch exhaust, emergency switch, indicator lamp;
- separate control cabinet, program steps Washing-Drip Off-Exhaust, adjustable washing- and exhaust times; pneumatic door release after exhaust time, automatic start of exhaust of the washing chamber when loading door is opened, automatic switch-over flapping for exhaust of the drying chamber when loading door is closed;
- switch for automatic emptying of the washing tank by using the washing pump.
- no separate explosion proof area around the RotaClean is needed, if solvents with a flashpoint of > 55° C is being used!
Extension Modules
The desired screen size can be achieved by adding Extension Modules to the Basic Equipment Module.
The Basic Equipment Module and all used Extension Modules need to have the same basic size (800, 1000 or
1300 mm).
The max. possible height is 2400 mm (3x800mm)
resp. 3000 mm (3x1000 mm)
resp. 3900 mm (3x1300 mm).
the max. possible length is 4800 mm (6x800 mm)
resp. 6000 mm (6x1000 mm)
resp. 7800 mm (6x1300 mm).
RotaClean Basic Equipment Module 800
Basic module max. screen size 800 x 800 mm
Pump P1: 6,5 m³/h, 4 kW
Exhauster V1: 1300 m³/h, 0,55 kW
volume of solvent washing tank max. 200 l,
RotaClean Extension Module 800
- 1 additional pair of spray bars 800 mm
- extension of the max. screen size by width x height = 800 mm x 800 mm,
including all necessary extension of tank volumes; - washing pump with extended volume
- exhauster V1 with extended output, extended flaps, ducting and droplet separator
RotaClean Basic Equipment Module 1000
Basic module max. screen size 1000 x 1000 mm
Pump P1: 8,0 m³/h, 4 kW
Exhauster V1: 1300 m³/h, 0,55 kW
volume of solvent washing tank max. 200 l
RotaClean Extension Module 1000
- 1 additional pair of spray bars 1000 mm
- extension of the max. screen size by width x height = 1000 mm x 1000 mm,
including all necessary extension of tank volumes; - washing pump with extended volume
- exhauster V1 with extended output, extended flaps, ducting and droplet separator
RotaClean Basic Equipment Module 1300
Basic module max. screen size 1300 x 1300
Pump P1: 10,0 m³/h, 4 kW
Exhauster V1: 1800 m³/h, 0,75 kW
volume of solvent washing tank max. 200 l
RotaClean Extension Module 1300
- 1 additional pair of spray bars 1300 mm
- extension of the max. screen size by width x height = 1300 mm x 1300 mm,
including all necessary extension of tank volumes - washing pump with extended volume
- exhauster V1 with extended output, extended flaps, ducting and droplet separator
Options:
Final Rinse Basic Equipment Module
- Final rinse spraybar system, consisting on static bars with high performance cone jet nozzles in the washing chamber;
- pneumatic diaphragm pump, housing made of aluminium, membrane made of Teflon,
- pumping volume 4 m³/h, max. pressure 3 bars,
- suction lance with hose for connection to fresh solvent barrel,
- Max.-level switch, stops rinsing process if wash tank is full;
- indicator lamp which indicates "wash tank full"
Methods of storing fresh solvent for automatic rinsing:
The fresh solvent for the rinsing and filling process can be stored in a barrel or in the integrated fresh solvent tank. Both alternatives are being described below:
Rinsing from barrel
- suction lance with stainless steel corrugated tube, including the plumbing with rinsing pump P2
- 3/2-directional-ball valve H4 to switch from rinsing to filling
- 3/2- directional-ball valve H2 to switch from rinsing to filling by using integrated rinsing tank
(see next pos.)
Integrated Rinsing Tank
- rinsing tank placed laterally below the washing chamber including overflow to the washing tank;
- hinged lid, also useful for refilling from canisters; connection for refilling with external pump;
By refilling the rinsing tank, the washing tank will be refilled also by using the overflow till the min. level (optical filling indicator) is reached. By using the rinsing option, the wash tank is being filled up. When rinsing tank is empty, the wash tank is full and has to be emptied.
Explosion proof execution for solvents with flashpoint > 40°C >55°C
- separate control cabinet for installation outside of the EX Zone; control cabinet with ready installed cable harness of 8 m;
Exhauster- and Pump-Motor ex-proofed category 2
Pump P1 ex-proofed (outs) category 2,
dry-run protection by level monitoring
Distillation Buffer Tank/Storing Tank for Used Solvents
To buffer used solvents. If used as a buffer tank for distillation units with the same size than the filling volume of the distillation unit, the distillation process is effective and independent.
It results in a much higher distillation capacity and smaller distillation units can be used.
- cubic container with screwed lid, made of high grade stainless steel 1.4301
- max.-level switch, connection for connections filling and emptying
- hinged lid for control and sampling
Emptying with Diaphragm Pump (Emptying by wash pump comes as standard)
- pneumatic diaphragm pump, housing made of aluminium, membrane made of Teflon,
pump capacity 4 m³/h, pressure 2 bar,
compressed air consumption 17 Nm³/h - manual 3/2-directional-ball valve to switch from wash tank to separate distillation buffer tank
- flow monitor, stops the emptying pump if wash tank is completely empty
- automatic stop of the emptying process if max.-level of the buffer tank is reached