Highly efficient: Swirl droplet separators (DTA) from Körting

Maximum energy requirements, maximum protection of the environment: Swirl Droplet Separators from Körting Hannover AG are internationally more popular than ever before on account of their optimal separation performance.


They are applied, amongst others, in gas scrubbing plants to clean waste gas flows. So they provide a considerable contribution towards the observation of emission regulations and therefore also to the protection of the environment. Resulting from the extensive Körting know-how, complex assignments of tasks are turned hereby into tailor-made solutions.“

Waste gas entering swirl droplet separators is cleaned of droplets by means of separation”, as Arnd Rötz, grad. Engineer of Körting Hannover AG explained the illustration lying before him. A specially formed swirl vane puts the gas entering the droplet separator into rotation so that centrifugal force causes the droplets to be thrown outwards. “The separation chamber is formed as a spiral tube in which the separated droplets are led downwards as a wall film contrary to the flow direction of the gas”, stated the expert for waste gas cleaning. This specific characteristic permits rinsing of the interior surfaces of the separation chamber during operation on the gas discharge side without that the rinsing itself causes new droplets to be generated. The liquid is captured at the level of the swirl vane and then discharged.It is an interesting design with large, free cross-sections with which the interior surfaces of the spiral tubes can be cleaned in a process-accompanying manner and it guarantees low-maintenance operation practically free of fouling.By the installation of special additional rinsing systems, deposits/caking in the separator and on the vanes of the swirl vane itself can be avoided in critical cases even with the most difficult of products(e.g. those with a definite tendency towards deposiing/caking).

So high liquid loads such as a wall films and splash resp. rinsing water are also discharged. “These separators, due to our special constructional execution form, can be adapted optimally to customer-specific demands”, explained Arnd Rötz.Typical application fields are to be found, amongst others, in gas scrubbing plants in the chemical industry, in plants for the thermal concentration of caustic soda in the textile industry or also after wet de-dusting plants in drying technology. Here, swirl droplet separators are applied in low pressure as well as high pressure ranges.Their use in chimney construction may be mentioned as a particular application. Waste gases from gas scrubbing plants are usually saturated with water vapour. If discharged to the atmosphere via a chimney, a portion of the water vapour will condense in the waste gas chimney and will form fine droplets, so called re-condensates. Without an effective separation at the chimney outlet, these re-condensates will fall on the immediate surroundings as rain. Depending on the origin of the waste gas, these droplets can be extremely acidic resp. alkaline and damages thereby are unavoidable. Here, the installation of a swirl droplet separator offers an effective remedy. These separators have been applied, amongst others, in the paper industry or have been installed after flue gas scrubbing plants of firing plants e.g. in sewage works, or in the chemical industry, all with great success. Rated flows of up to 370.000 m³/h at chimneys of up to 100m in height have so been realised. Swirl droplet separators from Körting Hannover AG are made of all established materials such as carbon steel, high-grade steel and coated steel (rubberized, Halar etc.) or of plastics such as GFK, PP, PVC and PVDF, with and without reinforcements. Special materials can also be utilised. The separators are available in standard sizes of nominal values DN 200 up to DN 3000 and further sizes can be provided on demand.

At a glance

High separation degree (up to 5 µm)
Low pressure losses
Process-accompanying rinsing
Low maintenance
High operational reliability and availability
High cost/benefit effect