Semi-Dry Reactor (SDR)
Alongside its filter bag manufacturing, Micro-one Co., Ltd. designs and builds waste incinerators, flue gas treatment systems and power plant dust collection equipment on an EPC basis. Designs are checked with CFD flow analysis and 3D modeling, and every system can be fitted with Micro-one’s own DuraFill™ and CataFill™ filter bags.
We offer cost-effective consulting tailored to each customer and provide after-sales service once the plant is handed over.
Explore: heat recovery and waste-to-energy plants · flue gas treatment systems · power plant dust control · energy facility operations
An SDR (semi-dry reactor) sprays a fine mist of hydrated lime slurry into the flue gas to neutralize acid gases such as hydrogen chloride (HCl), sulfur oxides (SOx) and hydrogen fluoride (HF); the water evaporates in the hot gas, leaving only a dry by-product. It neutralizes acid gases as effectively as a wet system but produces no wastewater, so it is widely used upstream of the baghouse in waste incineration plants. Micro-one’s SDR sprays hydrated lime slurry [Ca(OH)₂] through twin-fluid nozzles and removes over 90% of acid gases.
Removes more than 90% of acid gases such as SO₂, HCl, and HF
Neutralizes acid gases as effectively as a wet system but produces no wastewater, and offers the simple structure and easy maintenance of a dry system
Reaction products leave as a dry powder that is easy to handle
Fine dust and reaction by-products are captured efficiently in the downstream baghouse
Lower initial and operating costs compared to wet systems
Treats both types of pollutants at the same time
Applicable to many types of industrial flue gas
Municipal and industrial waste incineration
Flue gas treatment for coal and biomass combustion
Acid gas emission control
An SDR sprays lime as a slurry, so it reacts faster and more efficiently; a DR injects dry lime and activated carbon powder and is simpler. Incinerators often use an SDR first for acid gases and a DR after it for the remaining acid gases and dioxins.
Yes. The sprayed water evaporates completely in the hot flue gas. The reaction products become a dry powder that is captured in the downstream baghouse.
PTFE filter bags are the usual choice for incinerator gas with high acid gas and moisture content. See our filter bag material guide.
Copyright © Micro-one Co., Ltd. All rights reserved.