Sorption
Removal of SOx by dry scrubbing
A multipollutant control system with demonstrated high efficiency at removing SOx and other hazardous pollutants as well.
The dry sorption process refers to the practice of injecting a dry alkaline mineral into a flue gas stream to reduce acid gas emissions (i.e. SO3/H2SO4, HCl, SO2, and HF). Two basic steps are considered:
- The first step is injection of a dry sorbent into the entrained flow reactor providing sufficient physical and chemical reaction time to catch and agglomerate acidic gas and organic compounds as well as heavy metals.
- During the second step, these compounds are removed by a downstream particulate matter control device such as a baghouse filter, electrostatic precipitator or candle filter.
Hydrated lime (Ca [OH]2) is normally used as the absorbent, either directly as calcium hydroxide in the form of a dry powder or produced on site from calcium oxide (CaO) in a dry hydration plant. Other often used sorbents are trona (Na2CO3 ∙ NaHCO3 ∙ 2H2O) and sodium bicarbonate (NaHCO3).
Particular features:
- Highly reliable solution with low CAPEX
- Reagent used in dry form.
- SOx-removal results (limited to approx. 70%efficiency is pending on temperature and watercontent of fluegas)
- Small footprint equipment.
- Different kinds of dry reagent can be used.
- Dry reaction products (removed from gas in the precipitator) can be recycled to feed.
Working Principle
Working Principle of Dry sorption with entrained flow reactorA dry reagent for SOx removal is injected to the raw gas upstream of the Entrained Flow Reactor where the chemical reaction takes place.
Reaction products are removed from the gas together with the furnace dust (dedusting) in the dedusting equipment.
The essential process stages are:
- Absorbent preparation and dosing
- Removal of SOx (acid gases) in the reactor
- Particulate removal device (ESP, bag filter, candle filter)
- Solids recirculation and product discharge
Downloads
Productos relacionados
Removal of SOx by wet scrubbing
For the wet desulphurization of flue gas, a scrubbing liquid is recirculating and injected to the exhaust where SOx is absorbed in the liquid and reacts. Simultaneously, the flue gas is saturated with water vapor. The reagent is fed to the sump of the scrubber unit and intermittent dewatering is used to drain the reaction agent.
absorbedor con secador por atomización
Los absorbedores con secador por atomización facilitan la eliminación de contaminantes ácidos, metales pesados y polvo de gases de escape y de gases de emisión en centrales eléctricas que utilizan combustibles fósiles, incineradoras de residuos e instalaciones industriales.
GEA Insights
Kytero 10 - los grandes cambios empiezan por lo pequeño
Con el GEA kytero 10, los investigadores y desarrolladores de las industrias biofarmacéutica, alimentaria y de nuevos alimentos tienen ahora a su disposición un potente acelerador de generación avanzada.
Cómo un robot de ordeño cambió la vida de una madre
La vida de Michele Schneider dio un giro inesperado cuando se casó con Virlei, un aspirante a ganadero, y ambos fundaron la explotación lechera Fazenda Inovação Schneider Milk en Brasil. Aunque era una recién llegada a la ganadería lechera, Michele vio crecer rápidamente su pasión por los animales y la granja. Y también su carga de trabajo.
En el menú: huevos más sostenibles
GEA ayuda a sus clientes a probar y escalar ovoproductos e ingredientes alternativos elaborados con fermentación de precisión.
