6/4/2023 0 Comments Gravity design![]() Often, the placement of the spouting and process elements governs the design support structures and systems are designed around their locations. ![]() ![]() Since the flow of the material is only propelled by gravity, the routing of spouts and chutes is a critical design element. Bulk material spouting at a grain processing facility. Spouts and chutes typically have a circular or square cross section are constructed of steel or perhaps aluminum are joined by flanges, clamps, couplings, or welds and can be lined with materials to resist abrasive wear or improve the flow of the commodity. Special coatings or processes that have changed the commodity’s flow characteristics also need to be considered.įacilities that rely on gravity flow to move their commodity will employ a network of spouts, chutes, and transitions. Other material properties and characteristics, such as moisture content, abrasiveness, and bulk density, are elements that are considered in a gravity flow design. Moving 10,000 bushels per hour of wheat requires a much larger facilit y than moving it at 1,000 bushels per hour. Another design parameter to consider is the flow rate of the commodity. The key property in bulk solids design is the angle of repose, or the slope that a stable pile of the material makes relative to a horizontal plane. The flow characteristics of a commodity (e.g., flour doesn’t flow in the same manner as soybeans) is a major design parameter to consider. ![]() Facilities that process or handle these materials have special design parameters. For these types of dry bulk solids, gravity flow is the primary method of material transfer. Many commodities do not lend themselves to transfer by pumps or blowers.
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