Dense Phase
Dense phase pressure conveying systems use compressed air to push materials from a single or twin pressure pot system through a pipeline to a destination where the air and product are separated.
Dense phase pressure conveying is particularly suitable for conveying high capacity materials over long distances to multiple destinations. Most systems include several air control valves and the high pressure compressed air supply — along with correct fluidization — is able to overcome any pressure drop that could be generated by difficult materials. Also providing controlled conveying for friable materials, the lower convey velocities can extend the service life for systems conveying abrasive materials as well.
Convey Rates: | < 30 tonnes/h. |
Convey Distances: | from short distances to greater than 300 m. |
Air mover: | compressor (screw, rotary, reciprocating) |
Conveying Pressure: | < 6 Barg. |
Material Air Ratios: | high |
NB: All values are approximate: please contact GEA for advice about how to convey your product.
To optimize the system, various techniques can be used to reduce compressed air consumption and cost, and additional options for specialized applications are available:
Systems generally operate on a batch basis as follows:
Valves and sensors are used throughout the process to control the air pressure and velocity and ensure correct fluidization and trouble-free product conveyance.
Lean or dilute phase pressure conveying systems use positive displacement blowers —providing air at up to 0.6 Barg — to convey materials through a pipeline to a destination where the air and product are separated by a filter.
Dense phase vacuum conveying systems use high capacity vacuum pumps (up to 99% vacuum) to convey materials from a feed hopper or silo to a receiving vessel or vacuum hopper where the air and product are separated by a filter. When the vessel is full, the vacuum is isolated and the conveyed product is discharged into the destination silo. The prod...
Lean or dilute phase vacuum conveying systems generally use positive displacement exhausters to provide a vacuum (up to 50%) to convey materials through a pipeline to receiving vessel where the air and product are filtered and separated. Lower capacity fan-based systems are also available.
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