Vacuum conveying by Gericke.
Gericke’s range of pre-engineered packaged vacuum conveying solutions have been designed to meet the needs of modern day processes.
The range is capable of transporting powders, granules, flakes, fibres and small component parts.
The equipment can be easily configured into many different solutions, with product throughputs up to 3500 kg/hour over distances of 60 metres. The system generally works on what is referred to as a “SUCK AND DUMP” principle, details of the operation can be found in the Principle of operation page.
The modular design provides the opportunity to adapt the components to various different process applications, some of which are detailed on the Area of application page.
Due to the robust method of construction and the use of an electrically powered vacuum pumps there are many benefits when using the packaged vacuum range of equipment. For further details about the benefits of the package vacuum system range please see the Advantages page.
The packaged vacuum conveying range is split in to three system sizes. They are most easily identified by the size of the receiving vessel supplied with the systems which are GV5 receiver (5 litres), the GV35 receiver (35 litres) and the GV120 receiver (120 litres). More information on the range can be found in the Specifications page.
Principle of operation.
The operation of a vacuum conveying system is relatively simple, with very few moving parts, providing easy operation and maintenance.
Most of Gericke’s packaged vacuum conveying systems work on what is referred to as a “suck and dump” system (As shown above). 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:
- 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 dusty 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 dispense cycle via a compressed air blast.
3. The vacuum pump package. This consists of an electrically powered vacuum pump, a secondary filter used to protect the vacuum pump, and a vacuum vent valve. The vacuum vent valve is used to enable the vacuum pump to continue to operate when in the discharge cycle, thus eliminating unnecessary starts and stops of the vacuum pump. There are a variety of different vacuum pump types in the packaged vacuum range. Pumps are selected on an application dependant basis, taking into consideration all of the conveying requirements.
Area of application.
Gericke’s package vacuum range of conveying equipment has considerable advantages over other types of pneumatic and mechanical conveying systems.
- Can convey most types of material.
- Dust free conveying as potential leaks are contained within the system.
- Large range of pick-up point options.
- Additional equipment can be positioned in the convey line with out the need to have additional convey equipment (inline sifter, nibblers, cone mills etc...).
- Compact / light weight receiving vessels (see below for receiver information).
- Secondary filter used to act as a back-up to the filters in the receiver.
- Standard filtration for the system to F7 with options for HEPA rated units, H11 in the receiver and up to H14 in the secondary filter.
- 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 3500 kg per hour.
- Solid state controls for reliability and ease of set-up.
Standard packaged vacuum systems have the following standard throughput ranges:
The above throughputs are product dependant and are based on products with a bulk density range of 0.5 kg/l to 0.8 kg/l over a 60 metre convey distance.
Special applications and throughputs are available on request.
As the operation of the package vacuum system is relatively un-complicated a wide range of control types can be used to operate the system.
The standard stand alone controller for the system is based around an intelligent relay housed with-in an electrical control panel. The intelligent relay is programmed to host all the operation and commissioning functions required to operate a single standalone package vacuum system, and has additional I/O to communicate with other equipment controllers.
The packaged vacuum conveying system can also be operated using a PLC system, either individual.
Materials of construction
The range comes with the options of 304 or 316 stainless steel construction, with the standard finish being bead blast external and 2B mill internal.
Special finishes available upon request.