— Generally, coal-fired exhaust gas must be desulfurized to reduce pollutant emissions. Flue gas desulfurization is mainly divided into wet desulfurization (ammonia method, limestone/lime-gypsum method, magnesium oxide method) and …

The captured SO2 combines with the lime or limestone slurry (Ca(OH)2 or CaCO3) to form several byproducts, primarily calcium sulfate (CaSO4) commonly called gypsum. Gypsum is recyclable or marketable for many industrial uses.

 — In this paper, chemical precipitation process is used for the treatment of the desulfurization wastewater generated by the waste gas treatment system of the limestone-gypsum flue gas desulfurization process of a thermal power plant.

In an attempt to figure out the transformation of fine particles during the limestone gypsum desulfurization, the physical properties of fine particles before and after the desulfurization system were measured in a power plant.

 — In this paper, chemical precipitation process is used for the treatment of the desulfurization wastewater generated by the waste gas treatment system of the limestone-gypsum flue gas...

 — Wet flue gas desulfurization was simulated to improve gypsum production using low-grade limestone. High-grade limestone with 94 wt% CaCO 3 content is used for producing gypsum with 93 wt% purity, but owing to the resource depletion of high-grade limestone, low-grade limestone should be replaced as an alternative.

 — Flue gas desulfurization (FGD) gypsum is a byproduct of the combustion of coal, used for electricity generation. This material is generated during the process of scrubbing flue gases from power plants to remove sulfur dioxide emissions, which contribute to acid rain and other environmental problems.

The main difference compared to conventional wet FGD process was to utilize granular limestone directly as a desulphurization reagent simultaneously adding acetic acid. Thus, the pulverizing of limestone, which causes power consumption, can be saved.

 — The most common system for flue gas desulfurization (FGD) is the wet scrubbing process in which, the contact between the flue gases to be treated and an alkaline sorbent such limestone is realized with the correspondent production of gypsum.

 — Cui et al. proposed a combination of limestone-gypsum wet flue gas desulfurization (WFGD) and wet condensation desulfurization technology for enhanced absorption desulfurization. This not only improved the desulfurization rate, but also reduced the energy consumption of the desulfurization system, and recovered heat and water …