Gericke’s range of pre-engineered packaged vacuum conveying solutions have been designed to assist in loading and refilling processes, driven by venturi ejector. By using an electric pump, on short distances, a dense phase conveying mode can be approached.
The modular design provides the opportunity to adapt the suction device to various different handling or process equipment. Sack tipping, Drum unloading, BBU Big Bag Unloading, feeder refilling, reactor loading, to name some examples. Vacuum conveyors are compact and light and are suitable for manual or automated operation.
Principle of Operation
Most of Gericke’s package vacuum conveying systems work on what is referred to as a "suck and dump" system. This is a cyclic operation where the system conveys for a set time or to a level, conveying stops, the discharge valves opens and the filters are cleaned. This sequence is then repeated.
There are a three crucial elements required for any package vacuum system, these are:
1. The material pick-up point. This can be a variety of different equipment dependant upon the type of material being handled, some of which are:
- The loading of a vacuum conveying system occurs either by lance or entrainment hopper.
- Sack tip station, used to handle sacks of approximately 20 kg.
- Feed bin, used as a material buffer, fed from another piece of equipment.
- Pick-up pot, used when the flow properties of the product are poor. A metered feed may be required.
2. The vacuum receiver. This piece of equipment is positioned at the end of the conveying line and is used to separate the product from the laden conveying air. As the product enters the receiver it reduces in velocity and drops out of suspension to the bottom of receiver. The vacuum source pulls the dusty conveying air to the top of the receiver, where a filter assembly is positioned, ensuring the air leaving the receiver is clean. In addition the filters are automatically cleaned on every discharge cycle via a compressed air blast.
3. The vacuum generator. This can either be an electrically powered vacuum pump or a vacuum ejector operated with pressurized air.
Pumps or ejectors are selected on an application dependant basis, taking into consideration all of the conveying requirements.
Area of Application
- Fine and coarse powders, granules and bulky materials, small component parts
- 0.1 to 8 m3/hr, conveying distances varying from a short elevation up to 40 m.
- Food and Pet Food
- Foodgrade solution for Nutraceuticals
- Conveying of tablets and compacted particles
- Dye stuff and powder coating
- Pellet transfer
- Sack unloading
- FIBC discharging
- Silo discharging
- Weigh-Hopper loading of mixers
- Feeder refilling, both volumetric and gravimetric
- Mill loading and unloading
- Packing line supply
- Dust free conveying. Potential leaks are contained within the system.
- Operated with a vacuum ejector, simply connect the system to the existing compressed air net and run the system.
- Suitable for use in explosive atmosphere
- Hygienic and enclosed design and construction details available
- Additional equipment can directly be positioned in the conveying line (inline sifter, nibblers, cone mills etc...).
- Compact and light weight receiving vessels
- Modular construction for ease of strip down shortens cleaning time and maintenance interruption
- Control units pneumatically operated without ignition sources.
- Unit available in type 304 and 316 stainless steel.
- Special finishes available for the Food and Pharmaceutical Industries.
- Special designs to handle products with "difficult" flow properties and abrasive characteristics.
- Range of sizes available for throughputs up to 4000 kg per hour.
- ATEX execution available
- Large area filters with alternative filter media available to suit the application.
- Automatic filter cleaning during the discharge cycle utilising reverse jets of compressed air on a controlled time sequence.
- Internal surfaces crack and crevice free.
- Accessories like vacuum pumps, infeed bodies, conveyor bodies, controls, piping.