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
Pre2Fuel: Cleared for takeoff
GEA's innovative process marks a milestone in the pretreatment of biofuels such as hydro-treated vegetable oil and sustainable aviation fuel. By eliminating the bleaching process, manufacturers benefit from significant savings potential: over 50% lower operating costs and up to 12% less CO2 emissions.
GEA NEXUS: Una solución integral para un procesado de alimentos más sostenible
El cambio climático y el aumento de la población mundial ejercen una presión cada vez mayor sobre la industria alimentaria, que consume mucha energía, para alimentar a más personas sin afectar aún más al planeta. George Shepherd, Global Technical Sustainability Manager de GEA, explica cómo GEA utiliza sus conocimientos de ingeniería para ayudar a los procesadores a producir de forma más sostenible y, al mismo tiempo, aumentar la productividad.
Making milk production more sustainable for a growing world
The world's population is growing and with it demand for milk. Dairy is an essential component of many global diets. However, its production can be resource-intensive and impact the environment. GEA’s Christian Müller, Senior Director Sustainability Farm Technologies, sheds light on how technological innovations powered by GEA make milk production more efficient and profitable.
