The height-adjustable
rod agitator Biosubstrator®
TECHNICAL SPECIFICATIONS
| Type | Power rating | Current rating | Nominal speed | Thrust force | Circulating rate* |
|---|---|---|---|---|---|
| kW | A | rpm | N | m³/h | |
| BIOS 114 G | 11 | 21.5 | 54 | approx. 6,000 | approx. 8,300 |
| Motor 400 V, rated frequency 50 Hz, index of protection IP 54 | * Circulating rate according to ISO 21630:2007 |
DIMENSIONS AND WEIGHTS
| Propeller diameter | 1,500 mm |
|---|---|
| Required wall opening | Shaft lining 600 x 600 mm or core hole 500 mm |
| Required cover opening 1,500 x 1,200 mm to lift the agitator shaft |
1,500 x 1,200 mm |
| Total weight | approx. 900 – 1,300 kg depending on the version |
MATERIALS
| Agitator shaft | Solid, made of high-strength steel with acid-resistant polyolefin protective jacket |
|---|---|
| Parts flushed with gas in the digester | Stainless steel 1.4571 (V4A) |
| Parts outside the digester | Galvanized or painted or coated |
| Propeller (dia. 1,500 mm) | Stainless steel 1.4301 (V2A) |
SAFETY
- ATEX, IECEx and UL/CSA-certified versions for use in explosion protection zones 1 and 2
- Frequency inverter with parameterised safety software (torque limiting, etc.)
HIGH CIRCULATING RATE WITH LITTLE ENERGY
With large propeller diameters and slow, frequency-controlled speeds, the rod agitators of the Biosubstrator® type generate a lot of thrust with an excellent efficiency level. They are used above all in biogas generation and applications with difficult substrates (abrasive media, fibrous components, high dry matter contents, etc.).
POTENTIALLY EXPLOSIVE ATMOSPHERES
The agitators are available with various ATEX, IECEx and UL/CSA ignition protection types for use in explosion protection zones 1 or 2.
CONSTANTLY HIGH AND ADJUSTABLE AGITATING PERFORMANCE
The large hydraulic thrust can be adapted to the biological condition of the substrate or the agitating task by means of height adjustment. The substrate can flow in without obstruction because the agitating elements are not covered by any obstructive built-in components. The large diameters of the propeller and hub prevent material wrapping itself around the blades, thus ensuring a constantly high efficiency is available.
LOW SELF-GENERATED ELECTRICITY REQUIREMENT
The high circulating rate and excellent efficiency of the Biosubstrator® result from the large propeller diameter and slow-running, frequency-controlled rotation speed.
EASE OF SERVICING
Important wearing parts are mounted externally and are therefore easy to access for maintenance and servicing. For example, there is no need for the container roof (gas accumulator) to be opened regularly in biogas plants. The agitator shaft is sealed by a gas-tight siphon seal with contactless operation. In contrast to other rod agitators, there are no bearings or (mechanical) seals inside the tank!
HIGH RELIABILITY AND LONG SERVICE LIFE
The streisal Biosubstrator® is characterised by the sturdy configuration of the bearing bracket with regreaseable bearings and a large steel construction on the outside. Vibration dampers at the articulation points absorb peak vibrations and also contribute to the durability of the agitator.