AAT Chemical Desulphurization

Vertical pyrolysis centrifuges are a suitable technological solution to complete the separation process performed by receiver centrifuges. Centrifugal separators, with very high rotational speeds, can reach a centrifugal force of up to 10,000 grams. This very high centrifugal force is a key element that allows the separators to remove solid particles that have not been successfully trapped in previous separation steps. In addition, the achievable performance levels depend on many factors: structural (type and design of the disc, internal volume, surfaces and discharge devices) and operational (flow rate, product characteristics, amount and type of solid content, temperature).

The product enters the upper part of the separator through the feed tube for clarification and is then subjected to centrifugal force and is forced to pass through hundreds of internal disks. The combined operation of the centrifugal force combined with the internal disks leads to the separation of solid particles that deposit on the drum wall and are then automatically and intermittently discharged. Fluids rise to the top of the drum and are continuously discharged through free outlets or centrifugal pumps.

Description

Hydrogen sulfide and siloxane-related problems in biogas production plants lead to the implementation of a desulfurization unit. Among the different available desulfurization technologies of AAT, its chemical desulfurization benefits a high H2S removal capacity so that it can remove up to 99% of the content. It can also be mounted on the biogas digesters. The operation is based on the high affinity between iron (metal salt) and sulfur. With a low concentration of iron in the digester, hydrogen sulfide can be removed up to 150 ppm.