Dense phase transport, whether by pressure or vacuum, is characterised by medium or high pressure and lower velocity. (Typically pressure pumps and compressors). The transport pressure with pressure pumps is up to 900 mbar, and with compressors, it is up to 7 bar.
Fluidised dense phase
Characteristics:
Pressure: Pressure (Max. 4 kg/cm²)
Phase: Dense
Average velocity: Between 5 and 25 m/s
Transfer: Irregular batches
Observations:
Normally for fluidisable fine products
With fluidisation
No injector
Continuous transport with two pulsers in parallel
It is a system used to move bulk materials, such as powders or granules, efficiently through a conduit using compressed air. This system is characterised by operating in what is known as 'fluidised dense phase', an intermediate state between dense phase and dilute phase, where the material is suspended in a mixture of air and particles, but not fully suspended as in other pneumatic conveying systems.
In this process, the bulk material is introduced into a conduit or pipe along with compressed air at high pressure. The air drives the material, but due to the characteristics of the system, the air-to-material ratio is much lower compared to other methods like dilute phase conveying. In the fluidised dense phase, the particles are maintained in a kind of 'bed' inside the conduit, allowing the air to push them in a controlled manner.
The air flow generates a kind of 'fluidisation' in the material, which facilitates the transport of large amounts of material with lower air velocity, reducing abrasion and wear on the pipes and equipment. Furthermore, this system allows for efficient material transport even over longer distances, maintaining a high load capacity and without the need for large amounts of compressed air.
Pneumatic conveying in fluidised dense phase is ideal for:
Food Industry: For moving flours, powders, sugar, ground coffee, among other products that require careful and efficient handling.
Pharmaceutical Industry: In the transport of active powders, pharmaceutical ingredients, or excipients.
Chemical Industry: For the transport of bulk products such as pigments, fertilizers, powdered or granulated chemicals.
Construction Materials Industry: Such as cement, lime, gypsum, and other powdered or granular materials.
Recycling and Waste Treatment: For moving recyclable materials or solid waste in the form of powders or granules.
Lower energy consumption: By operating with a lower air-to-material ratio than other systems, the use of compressed air is reduced, resulting in lower energy costs.
Higher efficiency and load capacity: The system allows for the transport of large volumes of material without the need to use air velocities as high as in other methods.
Reduced wear: By operating in a dense phase, the materials move more smoothly within the conduit, minimising wear on both the pipes and the material itself.
Versatility: It is suitable for a wide variety of materials, including those with difficult physical characteristics to handle, such as fine powders or highly abrasive products.
Lower risk of contamination: The closed design of the system reduces the material's exposure to external contaminants.
Maintenance: While the system reduces wear compared to other methods, it is important to carry out proper maintenance on the valves and the air compressor to ensure the continuous and efficient operation of the system.
Implementation cost: The system may have a higher initial cost due to the need for specialised equipment, such as compressors and control systems, but the long-term savings in energy efficiency and waste reduction offset this.
In summary, pneumatic conveying by pressure in fluidised dense phase is an efficient and cost-effective solution for moving bulk materials across various industries, combining the ability to transport large volumes with lower energy costs and careful handling of the material.
+34 964 046 912
Calle Bélgica 29 Nave 7 - Castellón de la plana - 12006 - España