The Experts below are selected from a list of 96 Experts worldwide ranked by ideXlab platform

Chiou-liang Lin - One of the best experts on this subject based on the ideXlab platform.

  • Simultaneous Control of acid gases and PAHs using a spray dryer combined with a fabric filter using different additives.
    Journal of hazardous materials, 2002
    Co-Authors: Zhen-shu Liu, Ming-yen Wey, Chiou-liang Lin
    Abstract:

    The purpose of this research was to simultaneously evaluate the removal efficiency of acid gases and PAHs from the flue gas emitted by a laboratory incinerator. This flue gas contained dust, acid gases, organics and heavy metals. A spray dryer combined with a fabric filter was used as the air Pollution Control Device (APCD) in this study. The operating conditions investigated included different feedstock additives (polyvinyl chloride (PVC) and NaCl) and spray dryer additives (SiO2, CaCl2 and NaHCO3). The removal efficiency for SO2 could be enhanced by adding inorganic additives, such as SiO2, CaCl2 and NaHCO3. The presence of PVC in the incinerator feedstock also increased the removal efficiency of SO2in the spray dryer. The improved removal of PAHs could be attributed to the addition of feedstock additives (PVC and NaCl) and spray dryer additives (SiO2, CaCl2 and NaHCO3).

  • The capture of heavy metals from incineration using a spray dryer integrated with a fabric filter using various additives.
    Journal of the Air & Waste Management Association (1995), 2001
    Co-Authors: Zhen-shu Liu, Ming-yen Wey, Chiou-liang Lin
    Abstract:

    This study investigated the effects of feedstock additives [polyvinyl chloride (PVC) and NaCl] and spray dryer additives (SiO2, CaCl2, NaHCO3) on heavy metal and fly ash removal efficiencies, and on particle size distribution of heavy metals. A spray dryer with an integrated fabric filter was used as an air Pollution Control Device (APCD). Removal efficiencies for fly ash and heavy metals were greater than 95 and 90%, respectively. When additives of PVC or NaCl were used, the concentration of heavy metals distributed in fly ash apparently varied when the particle diameter was 1 microm).

Changhe Chen - One of the best experts on this subject based on the ideXlab platform.

  • Mercury emissions from six coal-fired power plants in China
    Fuel Processing Technology, 2008
    Co-Authors: Liang Zhang, Yuqun Zhuo, Lei Chen, Changhe Chen
    Abstract:

    Abstract Mercury emission field measurements based on the Ontario Hydro Method (OHM) were conducted for six coal-fired power plants in China. The mercury mass balances for the six power plants varied from 100.3% to 139.5% of the input coal mercury for the whole system. About 0.02%–1.2% of the mercury remained in the bottom ash. In the first five power plants equipped with pulverized coal boiler, most of the mercury was emitted from the stack to the atmosphere. The plants with Electrostatic Precipitator (ESP) system emitted more Hg 0 than Hg 2+ , while the plants with the Fabric Filter (FF) emitted less Hg 0 than Hg 2+ . Virtually all of the Hg P enter the ESP or the FF was removed. The FF systems had better Hg 0 and Hg 2+ removal efficiencies than the ESP systems. The flue gas desulfurization (FGD) system removed up to 78.0% of Hg 2+ and only 3.14% of Hg 0 in the flue gas, while 8.94% of the original mercury in the coal was removed by the FGD system. The average mercury removal efficiencies of the ESP systems was 11.5%, that of the FF systems was 52.3% and that of the combined ESP + FGD system was 13.7%, much lower than the average removal efficiencies of Pollution Control Device systems in US plants which have been used in previous studies of Chinese mercury emission inventory. Hg 0 , rather than Hg 2+ as assumed in previous estimates, has been found to be the dominant species emitted in the atmosphere. The average emission factor was found to be 4.70 g/TJ (10.92 bl/Tbtu), which is much higher than for US plants burning bituminous coals due to the high mercury content in the Chinese coal and the low mercury removal efficiency of air Pollution Control Devices of power plants.

C. Rappe - One of the best experts on this subject based on the ideXlab platform.

Guo-ping Chang-chien - One of the best experts on this subject based on the ideXlab platform.

  • The PCDD/F Removal Efficiency of a Medical Waste Incinerator Dual-Bag Filter System
    Aerosol and Air Quality Research, 2014
    Co-Authors: Ming-wei Chen, Ta-chang Lin, Lin-chi Wang, Guo-ping Chang-chien
    Abstract:

    This study investigated the polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/Fs) removal efficiencies in two medical waste incinerators (MWIs) -MWI-A and MWI-B, with waste burning capacities of 9.12 and 12 tons per day, with dual-and single-bag filter systems, respectively. The PCDD/Fs in the stack flue gas and fly ashes of each air Pollution Control Device (APCD) unit were collected concurrently. Based on mass balance, it was determined that the major PCDD/F removal occurred in the bag filter system with activated carbon injection (ACI). The total PCDD/F emission removal efficiencies for the whole dual-bag filter system, bag filter 1 (BF1), bag filter 2 (BF2) in MWI-A and the single bag filter system (BF) in MWI-B were 99.7%, 84.8%, 98.0%, 99.0% on the mass basis, respectively. The PCDD/F emission ratio (the escaped PCDD/F ratio after all APCDs) with the dual-bag filter system was over four times lower than that with a single bag filter. The results demonstrate a very efficient way to reduce the excess PCDD/F emissions incurred by intermittent operations and irregular waste feeding.

Edwin S Olson - One of the best experts on this subject based on the ideXlab platform.

  • mercury capture by native fly ash carbons in coal fired power plants
    Progress in Energy and Combustion Science, 2010
    Co-Authors: Constance L, Eric M Suuberg, Robert H Hurt, Jennifer Wilcox, Edwin S Olson
    Abstract:

    Abstract The Control of mercury in the air emissions from coal-fired power plants is an ongoing challenge. The native unburned carbons in fly ash can capture varying amounts of Hg depending upon the temperature and composition of the flue gas at the air Pollution Control Device, with Hg capture increasing with a decrease in temperature; the amount of carbon in the fly ash, with Hg capture increasing with an increase in carbon; and the form of the carbon and the consequent surface area of the carbon, with Hg capture increasing with an increase in surface area. The latter is influenced by the rank of the feed coal, with carbons derived from the combustion of low-rank coals having a greater surface area than carbons from bituminous- and anthracite-rank coals. The chemistry of the feed coal and the resulting composition of the flue gas enhances Hg capture by fly ash carbons. This is particularly evident in the correlation of feed coal Cl content to Hg oxidation to HgCl 2 , enhancing Hg capture. Acid gases, including HCl and H 2 SO 4 (at small concentrations) and the combination of HC1 and NO 2 , in the flue gas can enhance the oxidation of Hg. In this presentation, we discuss the transport of Hg through the boiler and Pollution-Control systems, the mechanisms of Hg oxidation, and the parameters Controlling Hg capture by coal-derived fly ash carbons.