Pneumatic Conveying Systems

Product Details:

Vacuum Conveying - Lean Phase

Lean Phase Vacuum Conveying systems mainly use exhausters that provide up to a 50% vacuum to deliver the material through a conveying line to receiving vessel where the air and product are filtered and separated. For lower capacity, Fans may also be used as the base force.

System Operation

• The fans or positive displacement exhausters are activated, causing a vacuum to be formed in the system.
• Material is fed into the system; with a rotary valve airlock (or screw feeder) if metering or dosing is required.
• The material is carried by the vacuum and delivered to a receiving vessel.
• Filters then extract the material from the air and the product is then transported to its destination.

Features:

• A low to moderate conveying rate and distance, usually at a short distance with low capacity.
• Suitability for conveying materials which tend to pack or compress under pressure.
• Reduces dust hazard in the unlikely event of a system leak.
• Allows material to be weighed and dosed if required.
• Ability to convey materials from multiple sites to a single location.

This method is frequently used for central vacuum cleaning systems or to draw product from multiple silos and other applications that require a reticulated network of vacuum pipes to convey product to a single collection point.

Applications

Such as wood shavings or fibre material, as well as toxic materials which are hazardous in the workplace.

Product Details:

The PTS – Powder Transfer System offered by Mechcon Technologies is an exceptionally effective and reliable method of transferring and dispensing both dry and wet powders and granules. Its unique filtration concept with a flat membrane and cartridge membrane makes it the only vacuum dense-phase system suitable for large number of powders.

Powder Transfer System Benefits:

• Contained Product Transfer
• Ease of Bin Filling and Discharging
• Ease of Cleaning

Features

• Empties or fills all process equipment (including reactors, dryers and centrifuges)
• Transfers all powders (sticky, fine, non-free flowing, hygroscopic, humid, etc.)
• Charges directly into closed vessels under vacuum or pressure ·
• Easy to install, operate and maintain
• Uses flexible hose for material suction with FDA approvals
• Totally hygienic.
• Operator no longer exposed to a reactive environment
• Creation of electrostatic charges is strongly reduced as hos is statistically earthen.
• It’s a solution for mobile convening.

Vacuum conveying - Working principle

• Creation of a permanent under pressure inside the separator
• Suction of the powder from the supply hopper (bag, IBC, silo, etc…)
• Cyclone filling, up to the level sensor or till the predetermined time.
• Opening of the discharge valve
• Powder discharge and cleaning of the separator’s filter, using a gas blow-back
• During all the transferring the filter clogging is controlled by a differential pressure transmitter

Following are the advantages of vacuum conveying system over pressure conveying system

• Economical Solution
• Easy to install and operate
• No moving parts in contact with the material to be conveyed
• Complete close system, which allows product and environmental protection
• Generally preferred for delicate and dangerous products quite safely
• Able to transfer a wide range of products (fine, non-free flowing, hygroscopic, sticky powders)
• Transfer capacity from few kg to 4 ton per hour
• Safe conveying of API/HAPI’s - up to OEB5
• Low footprint
• Filtration surface in function of the application
• Integrated hi efficiency in-line filter cleaning system
• Minimal or No tools required to disassemble the unit
• Easy to clean
• GMP and ATEX compliant

Mechcon PTS Models

Product Details:

Pressure Conveying - Lean Phase

 

Lean or dilute phase pressure conveying systems one of the most common conveying methods used for powders and granules, such as sugar or flour. The system uses positive displacement blowers - providing air at up to 1 Bar (g) - to convey materials through a pipeline to a destination where the air and product are separated by a filter.

Features:

Ideal for materials that are smooth and robust with a light bulk density.

• Commonly used for dosing and continuous weighing systems.
• A wide range of convey rates and distances that can be tailored to the materials being delivered.
• The ability to convey materials from single or multiple sites to multiple destinations
• The low operating pressures allow less expensive pipelines and fittings to be used
• A simplistic and economical design,

Options

• Air filtration, De- humidification and cooling systems
• Inline sifting, Sampling, De -lumping, metal detection and magnetic separation systems 
• weighing and dosing equipment
• Special feeding systems for cohesive, sticky or lumpy products and other special properties
• Easy for cleaning design
• Stainless steel construction for sanitation or corrosion resistance 
• Stepped lines to reduce terminal velocities, abrasion and degradation.

Pressure Conveying - Dense Phase

Dense Phase Pressure Conveying Systems generally use compressed air in between 1 Bar (g) to push materials through a conveying line to its destination where the air and product are separated. The product extrudes through the pipeline, initially at a low velocity, and gradually accelerates towards the destination.

Typical System - Generally operate on a batch basis

• Fill the pressure vessel unit with product to be conveyed
• Pressurize with compressed air
• Open the discharge valve until the product has been conveyed out
• Close the discharge valve and refill the vessel.
• A panel of supplementary air valves and sensors with correct fluidization is used to control the air pressure in the pipe and the velocity of the material at intervals throughout the system to ensure the smooth conveying of the material. This also allows the flow of the material to be stopped and started again with relative ease.

 Features:

• A high conveying rate and distance, but sacrifices low convey velocity
• The ability to convey materials from a single point to multiple destinations.
• The ability to convey fragile, heavy or abrasive materials

Options

To optimize the system, various techniques can be used to reduce compressed air consumption and cost, and additional options for specialized applications are available: 

 Twin vessels to provide continuous conveying 

• Line boosters to assist conveying 
• Air injectors to fluidize materials to reduce friction 
• Pulsed air injection to break up the product flow into discrete slugs 
• Vibration to loosen cohesive powders prior to conveying 
• Inline sampling, De-lumping, metal detection and magnetic separation systems 
• stepped lines to reduce terminal velocities, abrasion and degradation 
• stainless Steel construction for sanitation or corrosion resistance 
• Polished designs as per FDA standards with ease of cleaning facility.