Macawber Engineering, Inc. specializes in the design and engineering of low velocity, dense phase pneumatic conveying and bulk handling processes. True to our core business for over 40 years with thousands of installations, we offer long term, reliable and efficient solutions to process industries worldwide.
Dense phase pneumatic conveying is the high pressure (>15psi), low velocity (2-15 feet/sec) transfer of dry, bulk materials. Material is gently conveyed using compressed gas or nitrogen through the convey pipe in a continuous dense phase, short slug, or bed flow below the saltation velocity which is where the material is lifted into the airstream.
Dense phase pneumatic conveying is the high pressure (>15psi), low velocity (2-15 feet/sec) transfer of dry, bulk materials. Material is gently conveyed using compressed gas or nitrogen through the convey pipe in a continuous dense phase, short slug, or bed flow below the saltation velocity which is where the material is lifted into the airstream.
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Our innovative approach to pneumatic conveying, developed in the 1970s, enabled the industry to move from dilute phase systems to dense phase system. Our philosophy is to provide expertise to design and manufacture systems that are simple and reliable.
This concept has transformed not only pneumatic conveying, but also our customers' material handling capabilities and continues to be recognized as a proven and tested approach to low velocity, dense phase pneumatic conveying.Our passion for science and understanding how to best convey materials, especially those that are difficult to handle, has been critical to our success.
This concept has transformed not only pneumatic conveying, but also our customers' material handling capabilities and continues to be recognized as a proven and tested approach to low velocity, dense phase pneumatic conveying.Our passion for science and understanding how to best convey materials, especially those that are difficult to handle, has been critical to our success.
Our focus for decades has been to become an expert in dense phase pneumatic conveying, to understand processes and flow characteristics of materials, design high quality systems and offer our customers long term solutions and value. Today we are known for our expertise in conveying materials of all kinds with unique capabilities to handle difficult to convey materials.
Material is conveyed below the saltation velocity in a moving bed flow pattern (rolling or plowing). Velocities are 10-25 ft/sec at the feed end, and 40-70 ft/sec at the terminal end. Continuous dense phase is used to handling powders that may be easily fluidized and are able to retain air.
Material is conveyed below the saltation velocity in a slug-type flow pattern, i.e., a slug or series of slugs separated by air gaps are conveyed along the pipe.The slugs completely fill the full cross section of the pipe. Velocities at the feed end are typically 3-15 ft/sec and 10-30 ft/sec at the discharge end.
Material is conveyed below the saltation velocity in a slug-type flow pattern, i.e., a slug or series of slugs separated by air gaps are conveyed along the pipe.The slugs completely fill the full cross section of the pipe. Velocities at the feed end are typically 3-15 ft/sec and 10-30 ft/sec at the discharge end.
The process of biomass conversion for fuel presents unique challenges for utilities and industries. For instance, the ash produced by burning organic materials, such as grains, wood, ground plant material and corn produce ash that is lighter than coal and as such, requires expertise to convey successfully.
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Raider -
Jul 03, 2021
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