Dense Phase Systems. The second category, high pressure systems, are known as dense phase systems. These systems utilize air pressure above 15 psig (up to 50 psig) in the pipe and use positive pressure to push materials through the conveying line at relatively low velocities (from 100 fpm to a maximum of 1000 fpm) much like extruding.
Major advantages of a dense-phase system versus a dilute-phase system include reduced conveying gas velocity (yielding less pipeline wear and particle damage), lower gas requirements, lower operating (energy) costs, and the ability to convey long distances. Pressure versus vacuum systems.
Jan 11, 2007· Dense-Phase Pneumatic Conveying Systems. Pneumatic conveying is achieved by creating a pressure differential along a pipeline and using the air that moves toward the area of lower pressure to move bulk material. This process can be performed with a vacuum …
Dilute and dense phase systems Dilute and dense phase conveying do not relate to any particular type of system. Any bulk particulate material can be conveyed in dilute phase. It is primarily the properties of the mate-rial that determine whether the material can be conveyed in dense phase, particularly in conventional conveying systems.
The dense phase system's smaller and lighter elbows and similar components provide the same advantages. Choosing pressure or vacuum operation for your dense phase conveying system depends on the same factors as for a dilute phase system: whether air leaking into or out of the system will have a negative effect and whether your material packs ...
Apr 11, 2016· DESIGN EXAMPLE – DILUTE PHASE PNEUMATIC CONVEYING. A plastics production plant wants to increase the capacity through an existing conveying system. The existing system has 6 inch ID pipes and is configured as shown in the diagram below. The High Density Polyethylene (HDPE) particles have an average size of 4 mm. The conveying gas is at 68oF.
Continuous Dense Phase Vacuum System The HDV 8000 Vacuum Concept Conveying System is a dense phase, low to medium velocity, high pressure, continuous vacuum conveying system. It is generally used to convey low to high density, friable, and abrasive materials and/or other materials where degradation or abrasion is a concern.
Pneumatic transportation can be built as a pressure or vacuum system. The most commonly applied pneumatic conveying mode is dilute phase conveying where particles are airborne. Depending on the size, shape and weight of the particles, the gas velocity will range from 4 to 40 m/s [4,000 to 8,000 ft/min].
In the above table, air to material ratio measures system efficiency. It is the ratio of weight (lbs/kg) of material conveyed per weight (lbs/kg) of conveying gas used. Due to low conveying velocity, dense phase systems are often chosen for applications where the product is friable, abrasive or smears such as sand, glass, and coke.
Sep 04, 2019· Pressure and vacuum systems can be used for dense (high pressure/low velocity) or dilute (low pressure/high velocity) phase operation. Dense phase conveying systems have a low air-to-material ratio. Velocities are below the saltation level, the critical velocity at which particles fall from suspension in the pipe.
Mar 21, 2017· Basics of dense phase conveying layout and sequence of operations. Now that we have a clearer picture of the materials that can be conveyed via dense phase systems, let us move further and know about its layout and sequence of operations. Step 1: The pressure vessel is filled with materials. Step 2: The valve and seals close the pressure vessel ...
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.
Jul 07, 2008· All the conditions at the intake of a pneumatic conveying system are known. Therefore the intake is chosen as the start of the calculation. In vacuum- and pressure pneumatic conveying calculations, the used product properties are identical. The only difference is the mass flow, generated by a compressor in vacuum mode or pressure mode.
Understanding dense-phase conveying I n the world of pneumatic con-veying, there are two system types: dilute- and dense-phase conveying. Dilute-phase conveying is the most common of these two systems, due in part to its relatively straightforward design. If designed correctly, a dilute-phase conveying system can provide reliable and flex-
For dilute phase conveying the minimum conveying air velocity is about 11 m/s, which is just a little lower than that for the fly ash shown in Fig. 12.1a.Because the material conveys so well, however, the transition to low-velocity dense phase conveying is occurring, with increase in air supply pressure, and as a consequence, the material is conveyed at a solids loading ratio of about 60 and ...
Apr 11, 2016· 3. DESIGN EXAMPLE – DILUTE PHASE PNEUMATIC CONVEYING A plastics production plant wants to increase the capacity through an existing conveying system. The existing system has 6 inch ID pipes and is configured as shown in the diagram below. The High Density Polyethylene (HDPE) particles have an average size of 4 mm. The conveying gas is at 68oF.
ic conveying system in a very short space of time, whether for a new or an existing system. Horizontal and vertical sections of pipeline and bends are all accommodated, as well as dilute and dense phase conveying. For high-pres-sure systems the influence of stepped pipelines can …
Pneumatic conveying systems are basically quite simple and are eminently suitable for the transport of powdered and granular materials in factory, site and plant situations. ... it is referred to as dense phase conveying. Dilute phase Almost any material can be conveyed in dilute phase, suspension flow through a pipeline, regardless of the ...
Feb 09, 2014· I will be obliged if you can send me theory and calc of dense phase pneumatic conveying systems. ... for calculate of an example of dilute vacuum conveying material. If you help me, I can have progress in my job. My email address is : ([email protected]) Thank you very much. 9th February 2014, 22:07 #10.
system and for testing of your material in our pneumatic conveying lab. Dense phase (including vacuum dense phase and continuous low pressure dense phase) pneumatic conveying is also available - please contact us to discuss. 1-888-9-CONVEY Representing: MAC Equipment * New York Blower * Eriez Magnetics
2016-5-13nologies Dilute Phase Vacuum and Dense Phase Vacuum. In Dilute Phase Vacuum Conveying the bulk materials are entrained in the air stream. Up to 25000 lbs per hour 11000 kghr of bulk ma-terials can be moved for distances less than 300 feet 90m. Typically the line sies for these ap-plications are up to 6 150 mm. Read More
Aug 09, 2021· In contrast to dilute phase conveyors, dense phase conveyors are run using a controlled vacuum and low velocity, creating slow-moving, discrete "packets" of product throughout the system (one packet is shown moving in Figure 3). The goal of creating a slow, dense phase is to prevent excess stress, which allows these conveyors to move ...
Dense phase pneumatic conveying is a method for moving difficult, abrasive, mixed batch, or friable materials at a low product velocity. Our system incorporates low gas volume at high pressure, conveying materials through an enclosed pipe in slug form at a controlled product velocity. It conveys one of two ways: pressure or vacuum.
Jun 27, 2017· In dilute- phase vacuum conveying, material is entrained within the air stream, with a complementary ratio of air and product. System controls allow material to convey and discharge on demand, ideal for larger applications requiring movement of bulk materials from larger containers such as bulk bags, totes, railcars, and silos without a lot of ...
Mixing & conveying systems High density vacuum system conveying carbon black Dense phase pneumatic conveying systems Multiple 20 cu. ft. (0.6 cu. m) surge bins with Modu-Kleen® 669 bin vent fi lters Bulk bag and small bag unloaders discharge carbon black into multiple dense phase Full Line Concept® conveying systems.
Dense Phase Vacuum Conveying Used for applications where system compactness and ease of access is the key to design. These systems are generally suited for short distance low capacity applications using compact modules.
Pneumatic conveying systems are comprised of four parts:. 1. Prime mover. Compressors, fans, blowers, and vacuum pumps are used to move the gas stream. The engineer must determine the gas flow rate and pressure (positive or negative) required to convey the process stream.
Pneumatic Conveying Systems. IAC is a full service Pneumatic Equipment OEM (Original Equipment Manufacturer). We design, fabricate, install, and service the pneumatic conveying system equipment we supply. Our field service staff also provides system trouble shooting and performance evaluation. IAC's engineers are experts at designing ...