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·The removal efficiency of desulfurization processes on particulate matter mass was % % for the three study units The desulfurization systems PBDD/F removal efficiencies were 53
·The particulate matter PM could be simultaneously removed during the wet flue gas desulfurization WFGD process To analyze the underlying mechanism and removal efficiency the PM removal process in a desulfurization system was numerically simulated based on the population balance model and general dynamics equation in this study The equation
·The desulfurization efficiency of spouted bed increases first and then decreases with the increase of water content of desulfurization slurry The desulfurization efficiency is the highest when the water content is 40 kg H 2 O/kg dry sorbent and is close to the experimental value The optimum slurry water content for desulfurization process in
Abstract In this paper with the increasing requirement on the abatement of SO 2 emission in flue gas cyber physical system CPS is introduced into the limestone wet flue gas desulfurization process The slurry pH value a key factor affecting the flue gas desulfurization rate is analyzed and controlled in the context of cyber physical system on the basis of four stages namely
·Limestone gypsum wet flue gas desulfurization WFGD process is widely used in coal fired power plants in China because of its technical characteristics of high desulfurization efficiency mature process and strong adjustability Córdoba 2017; Wang et al 2010 With the continuous improvement of atmospheric emission standards the demands for slurry quality
Currently desulfurization technologies can be categorized into three main types wet flue gas desulfurization FGD [11] [12] [13] semi dry desulfurization [14] and dry desulfurization [15] Wet flue gas desulfurization is widely employed in large scale desulfurization processes due to its high efficiency and low energy consumption [16] However it poses a significant environmental
·Organic additives also improve limestone utility and prevent scale formation in desulfurization systems [1] gases were maintained at 3 % and 1 500 ppm respectively After the start of the experiment and during the reaction process a fixed volume of the slurry was collected at specific intervals for sulfite and sulfate ion analysis in
·The magnesium ion concentration was the input parameter of this calculation formula Warych et al [43 44] established a model of the thermal power plant flue gas desulfurization process based on
·Selective catalytic reduction SCR denitration may increase the emission of NH 4 and NH removal and transformation characteristics of ammonium sulfate aerosols and ammonia slip during the wet flue gas desulfurization WFGD process as well as the effect of desulfurization parameters were investigated in an experimental system equipped with a
·3 Flue Gas Desulfurization Technologies Flue gas desulfurization is an efficient method for the reduction of the sulfur dioxide emissions Citation 2 Many processes are available in the market such as a wet scrubbers b spray dry scrubbers c sorbent injection d regenerable processes and e combined SO 2 /NO X removal processes The different flue
·This paper presents a new liquid screen gas liquid two phase flow pattern with discarded carbide slag as the liquid sorbent of sulfur dioxide SO 2 in a wet flue gas desulfurization WFGD the basis of experimental data the correlations of the desulfurization efficiency with flue gas flow rate slurry flow rate pH value of slurry and
·Generally Hg 2 is the primary input form of WFGD in which Hg 2 undergoes a series of reactions because of the complex composition of the desulfurization slurry and migrates with it Chang et al 2017 The trapped mercury migrates with the circulation of desulfurization slurry and finally retains in both solid fraction and liquid fraction
·Experiments were conducted in a simulated wet flue gas desulfurization WFGD system to investigate the effects of sulfite slurry temperature pH value and atmosphere on mercury migration and re
·A combination of dual frequency acoustic cavitation acoustic cavitation and UV assisted advanced oxidation processes AOPs reaction system was developed for desulfurization of raw naphtha used to produce aviation fuels Various types of oxidants in hybrid systems including hydrogen peroxide acetic acid acetone air and ozone were compared
·The sulfur dioxide SO 2 emissions contribute to severe environmental pollution and respiratory problems which make the limestone gypsum wet flue gas desulfurization WFGD an increasingly important issue The WFGD system consists of the flue gas system the limestone slurry supply system the oxidation air supply system and the gypsum slurry
·Process migration and transformation of mercury in simulated wet flue gas desulfurization slurry system Author links open overlay panel Mingyang Sun Zimo Lou Guanghuan Cheng Shams Ali the combination of a wet scrubber and a catalyst has attracted research attention During this process the catalyst converts Hg 0 to Hg 2 then the Hg 2
·contacting the gases with an aqueous solution or slurry containing a sorbent The most common sorbents are lime Ca[OH] 2 and limestone CaCO 3 Rosemount Analytical pH equipment is used to control the feed rate of these chemicals PROCESS After fly ash removal the flue gas seen in Figure 1 is bubbled through the scrubber and the slurry
·Aerosol particulate matter with dynamic diameter smaller than μm PM is the main cause for haze pollution in a dominant precursor of PM SO 2 emitted from industrial process is now strictly controlled by using limestone/gypsum Wet Flue Gas Desulfurization WFGD system in China However a phenomenon that fine particle derived
·slurry are conducted directly at the absorbent tank through proper design of its volume to offer desirable retention times of recirculating slurry in the SO 2 absorp tion node It is known that with slurry retention time the pH value will rise as the CaCO 3 dissolves up to the point when slurry is saturated by Ca2 ions The Ca2 ion
·The addition of additives during the slurry digestion process also affects the structure of the slurry which in turn affects performance When the added additive content is low its main function is hygroscopicity which could promote digestion [18] H 2 O 2 can be used as a green oxidant in semi dry desulfurization system Zhao Yi [19] et
·Among the desulfurization technologies semi dry technology is widely used with the advantages of low cost low water consumption and no secondary effluent which is favored by most domestic and foreign users For a power plant the slurry after desulfurization of a semi dry desulfurization plant has the phenomenon of pipeline deposition in the process of pipeline
·At present the main processes of biogas desulfurization in most biogas plants are wet dry and membrane processes Tanikawa et al 2018 However the large scale application of these physical chemical desulfurization technologies is limited by the high operating cost Fernandez et al 2014 and secondary pollution Tang et al 2009 The biogas