Spray Drying Evaporation

The world-class thermal solution for achieving zero liquid discharge (ZLD)

GEA is, among others, a single-source supplier of cost effective, energy efficient and reliable wastewater evaporator systems, based on using spray drying evaporation.

Drying of salt and solid-containing effluents from various industrial processes, including wastewater streams from wet type FGD (flue-gas desulfurization), is efficiently enabled using the well-proven GEA spray drying technology and proprietary equipment. The heat of the hot flue gas from the industrial process is used to evaporate the water in the effluent, leaving a dry powder to be collected in a downstream filter with no liquid effluent discharge at all.

Spray drying is a mature technology that was developed over a century ago. GEA has successfully delivered installations worldwide across many different spray drying applications in the power, waste to energy, sinter & metallurgical and glass industries — to name some.

Key features

  • Mature and well-proven technology.
  • Unmatched rotary atomizer. 
  • Excellent performance and with outstanding distribution of droplets' size. 
  • Flexible process.
  • The heat source for effluent evaporation can be hot flue gas or pre-heated combustion air.
  • Dried salts and solids can be collected either in an optional particular filter or in the main dust collector.
  • Can be adapted for large variations of hot gas temperatures and ash load.
  • Full ranges of atomizer sizes for different effluent capacities.
  • System simplicity. Carbon steel construction with high degree of local supply.

Working Principle

Working Principle of Spray Drying Evaporation
spray-drying-evaporation-working-principle

The GEA spray drying evaporation process is highly efficient yet very simple, as it basically consists of the spray dryer evaporator module and a down-stream filter.

A slipstream of hot flue gas is fed into a spray-drying chamber where it immediately comes in contact with a fine spray from atomization of the discharged scrubber liquid of a wet FGD (WFGD) system. 

There is a precise control of the gas distribution, the WFGD scrubber liquid flow rate and droplet size to ensure that all droplets are converted into a fine dry powder. 

The flue gas further flows into an optional dust collector or the main filter where any remaining suspended solids are removed. The filtered  flue gases are then fed to the wet FGD for acid gases removal.

Downloads

GEA Insights

Le matériel de traite sur mesure favorise le bien-être des vaches et des éleveurs

Pour une production de lait durable et rentable, il est essentiel que les vaches soient saines et heureuses. Veiller à la bonne santé de son cheptel est, par conséquent, au cœur des activités quotidiennes des éleveurs. De nombreux...

Atteindre zéro émissions nettes avec les solutions d’ingénierie holistiques de GEA

Les industries de tous bords travaillent sans relâche pour atteindre les objectifs de zéro émissions nettes dans un contexte règlementaire et législatif toujours plus strict en matière de décarbonation. Simultanément, les entreprises...

À table avec … les nouveaux aliments : Préparer la nourriture de notre futur

Le café, le cacao, le lait, la viande, le poisson, les œufs : ces denrées de base reposent fortement sur l’agriculture intensive. Avec l’avènement des technologies à l’origine des nouveaux aliments, nous disposons de solutions...

Recevez l’actualité de GEA

Restez au courant des innovations et des activités de GEA en vous inscrivant aux actualités de GEA.

Contactez-nous

Nous sommes là pour vous aider ! Nous avons besoin de quelques renseignements pour pouvoir répondre à votre demande