Conveying bulk urea – it’s the pits

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Floveyor’s versatile design and clean, fast aero-mechanical technology provided the perfect conveying solution for a multinational chemical company’s West Australian subsidiary. Since 2006, they’ve relied on an F5 Floveyor to elevate urea prills and a range of other chemicals central to the production of resins and melamine.

The Challenge

The company’s open storage pit receives around 88 tons of urea three times a week. Elevating this high volume of hygroscopic material out of the pit and into a 180 ton external storage silo presented the sort of sizeable conveying challenge we love.

Our client needed to mount an energy efficient conveyor in the bottom of the pit. The shallow angle of the stainless steel pit liner made it impossible to install a vertical unit. They also wanted a system so robust and reliable that it would only need maintenance during their annual Christmas shutdown.

The selected conveyor would need to have minimal product retention as the pit was   located in an area exposed to humidity, rain and extreme heat. These climatic factors   cause any urea residue to liquefy and then crystalise as a solid mass.

 The Solution

We installed two linked F5 Floveyors to elevate the urea from the shallow pit to the center inlet of a silo at a throughput of over 80 tons per hour. This rate far exceeds the client’s specified rate of at least 30 tons per hour. Furthermore, the two Floveyors are powered by an extremely energy efficient 5kw motor.

Floveyor’s distinctive fluidising technology delivers total batch transfer. Any minimal residue of urea prills in the infeed trough is blown clear by a small air nozzle at the end of the day’s transfer. This efficient dry cleaning process leaves only a fine dusting of urea in the conveyor that does not crystalise overnight.

Installing the Floveyor was very straightforward due to its small footprint and top mounted drive. Annual Christmas maintenance involves removing the stainless steel grid and pit insert to inspect the inlet housing, sprocket, and single bearing. This is a simple, efficient process designed to work effortlessly in a restricted space.

In 10 years of flawless operation requiring minimal maintenance, these F5 Floveyors have transferred more than 13,000 tons of urea in this high pressure resin manufacturing operation.

Hexion