Customized handling of solids

Big Bag Entleerung mit Klumpenbrecher, Dosierschnecke und Lösemitteltank inkl. Rührwerk • Big Bag emptying with lump breakers, dosing screw and solvent tank with agitator

The mechanical engineering specialist SEGLER presented its process engineering solutions and international projects at the easyfairs SOLIDS Dortmund on May 21/22 2014. The company SEGLER created e.g. a complex Big Bag station for a company in the chemical industry (Fig.). The goal was the efficient and reliable processing of urea with a capacity of 10t/h and the following requirements:

Continuous opening of Big Bags

Providing a product template for a possible transition from batch to continuous operation

Product dispersion

Destruction of agglomerates

Continuous dosing

Dissolution of the solids in a suspension

A stable receiving frame receives the Big Bags filled with free-flowing, slightly lumpy raw material. Using a piercing pyramid, the Big Bags are efficiently pierced by their own weight. The directly connected material buffer with dispersing agitator and vibration discharge aid ensures a smooth friction-free feed of the material into the lump breaker. Its task is to destroy possible agglomerates to enable a uniform product flow to the metering screw.

The single-shaft screw-conveyor with graduated blade pitch, counter blade and ejector in the outfeed area conveys the goods upwards to the urea dissolving tank. It enables a dosed material feed. Afterwards, the urea and other aggregates are dissolved into a suspension in the unpressurized agitator vessel. Aside from the inlet pipes, the mixing tank, among other things, is equipped with a temperature, level and density metering. Adapted to the mixing task, substances to be processed and viscosity, the agitator includes 3-stage oblique blade agitators, agitators for remaining amounts at the dished bottom and 2 baffles.

The Big Bag station is manufactured in a low-dust design in accordance with chemistry standard and completely made of stainless steel (material 1.4404). Because of this, clean surfaces, lowest adhesion inclination and a higher material life can be guaranteed. Also in other areas, such as foods, an application is possible. Due to complete in-house design and production at SEGLER, the customer receives highly variable and ideally matched solutions to his needs with respect to performance, size, placement and standards.

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