Resource utilization of natural pyrite (FeS2) as the tailings after flotation of natural sphalerite (ZnS) for reclaiming high concentrations of gaseous Hg0 from Zn smelting flue gas

2021 ◽  
pp. 131644
Author(s):  
Qianqian Hong ◽  
Xufan Zhang ◽  
Runliang Zhu ◽  
Chang Wang ◽  
Jian Mei ◽  
...  
Keyword(s):  
Resource Utilization ◽  
Flue Gas ◽  
High Concentrations ◽  
Natural Pyrite

scholarly journals A novel resource utilization method using wet magnesia flue gas desulfurization residue for simultaneous removal of ammonium nitrogen and heavy metal pollutants from vanadium containing industrial wastewater

RSC Advances ◽  
2018 ◽  
Vol 8 (66) ◽  
pp. 38013-38021 ◽  
Author(s):  
Dean Fang ◽  
Xuefei Zhang ◽  
Xiangxin Xue
Keyword(s):  
Heavy Metal ◽  
Resource Utilization ◽  
Flue Gas ◽  
Industrial Wastewater ◽  
Ammonium Nitrogen ◽  
Flue Gas Desulfurization ◽  
Simultaneous Removal ◽  
Metal Pollutants ◽  
Heavy Metal Pollutants

A novel resource utilization method using wet magnesia flue gas desulfurization residue for the simultaneous removal of ammonium nitrogen and heavy metal pollutants from vanadium industrial wastewater was proven to be viable and effective.

scholarly journals Odstraňování rtuti z kyselých roztoků chloridu rtuťnatého sorbenty připravenými katalyzovanou vulkanizací rostlinných olejů

2022 ◽  
Vol 116 (1) ◽  
pp. 48-55
Author(s):  
Karel Svoboda ◽  
Tomáš Ružovič ◽  
Michael Pohořelý ◽  
Miloslav Hartman ◽  
Michal Šyc
Keyword(s):  
Flue Gas ◽  
Hot Water ◽  
Metallic Elements ◽  
Mercury Ions ◽  
Metallic Mercury ◽  
Acidic Solutions ◽  
Mercury Compounds ◽  
Acidic Conditions ◽  
High Concentrations ◽  
Neutral Conditions

Mercury is a metallic element, dangerous and toxic for the environment. Presently, the incineration of municipal solid waste (MSW) belongs to important sources of Hg emissions. Methods of conversion of metallic mercury and mercury compounds from soluble and toxic forms into water insoluble/non-toxic form (HgS) are sought after. Gaseous HCl and a significant part of HgCl2 vapors present in flue gas from incineration of MSW can be removed there by absorption in hot water. Efficiencies of Hg2+ removal from acidic water solutions by means of sorbents prepared by catalyzed reaction of sulfur with vegetable oils (inverse vulcanization) were studied. These kinds of sorbents were tested and found to be exploitable for selective removal of mercury ions from aqueous solutions, particularly from acidic solutions containing HCl at higher temperatures (50–75 °C). Presence of relatively high concentrations of salts of some other metallic elements (Fe, Zn, Ca) had only very small effects on Hg-sorption. Mercury adsorbed on such sorbents converts relatively quickly into a non-toxic form (HgS). Reactive sulfides and SH‑groups present on the surface of the sorbent particles contribute to a faster sorption of mercury and its conversion to HgS. Leaching of zinc from the catalyst (Zn‑diethyldithiocarbamate) present in the vulcanized sorbents is negligible at neutral conditions and small (about 10 %) at acidic conditions (pH = 1.5).

Electron Beam Treatment of Flue Gas with High Content of SO2

1996 ◽  
Vol 1 (2) ◽  
Author(s):  
A. G. Chmielcwski ◽  
Z. Zimek ◽  
S. Bulka ◽  
J. Licki ◽  
G. Piderit ◽  
...  
Keyword(s):  
Electron Beam ◽  
Sulfur Dioxide ◽  
Flue Gas ◽  
Electron Beam Treatment ◽  
High Concentrations

AbstractFlue gas containing high concentrations of sulfur dioxide (up to 15%) was used to investigation the possibility of applying the electron beam process for SO

Effect of pH on nitrate and selenate reduction in flue gas desulfurization brine using the H2-based membrane biofilm reactor (MBfR)

2011 ◽  
Vol 63 (12) ◽  
pp. 2923-2928 ◽  
Author(s):  
Steven W. Van Ginkel ◽  
Ziming Yang ◽  
Bi-o Kim ◽  
Mark Sholin ◽  
Bruce E. Rittmann
Keyword(s):  
Flue Gas ◽  
Electric Utilities ◽  
Low Ph ◽  
Biofilm Reactor ◽  
Flue Gas Desulfurization ◽  
Effect Of Ph ◽  
Continual Improvement ◽  
Membrane Biofilm Reactor ◽  
High Concentrations

Increased tightening of air regulations is leading more electric utilities to install flue gas desulfurization (FGD) systems. These systems produce brine containing high concentrations of nitrate, nitrite, and selenate which must be removed before discharge. The H2-based membrane biofilm reactor (MBfR) was shown to consistently remove nitrate, nitrite, and selenate at high efficiencies. The maximum selenate removal flux reached 362 mg Se m−2d−1 and was higher than that observed in earlier research, which shows continual improvement of the biofilm for selenate reduction. A low pH of 6.8 inhibited precipitation when treating actual FGD brine, yet did not inhibit removal. SO42− was not removed and therefore did not compete with nitrate, nitrite, and selenate reduction for the available H2.

scholarly journals An Analytical Modeling Approach for Performance Evaluation of Electrostatic Precipitator (ESP)

2019 ◽  
Vol 1 (2-2) ◽  
Author(s):  
Shanti Faridah Salleh ◽  
Afrasyab Khan ◽  
Cirilo Nolasco Hipolito ◽  
Lennevey Kinidi ◽  
Dayang Siti Herdawati Abang Hardin
Keyword(s):  
Performance Evaluation ◽  
Power Plant ◽  
Flue Gas ◽  
Analytical Modeling ◽  
Fine Particles ◽  
Electrostatic Precipitator ◽  
Flow Rates ◽  
Overall Performance ◽  
High Concentrations ◽  
Migration Velocities

A coal-fired flue gas contains high concentrations of fine particles which can pose a threat to the environment. In this study, an electrostatic precipitator is used to remove the fine particles of the flue gas from a 100MW coal fired power plant by using a model. A model has been presented to estimate the performance of the wet electrostatic precipitator (WEP) in terms of the number of plates, flow rates and velocity. The equations have been specified for the charging and charge on the single particle of some definite diameter. The effect of the measuring points for the calculation of the effective migration velocities and hence overall performance along with the re-entrainment and gas sneakage have been incorporated. Ranges for the above-mentioned parameters are well defined and it has been observed that after a certain range values across number of plates, velocities and flow rates there is no significant improvement in the performance of the WEP has been calculated.

Research on the Treatment of High Concentration Dust with Bag Filter

2013 ◽  
Vol 448-453 ◽  
pp. 1369-1377
Author(s):  
Ting Shuang Leng ◽  
Bao Rui Liang ◽  
Cun Yi Song ◽  
Zhen Song Tong ◽  
Hong Qiang Liao
Keyword(s):  
Pulse Pressure ◽  
Flue Gas ◽  
Injection Pressure ◽  
Flue Gas Desulfurization ◽  
Filtration Velocity ◽  
Injection Time ◽  
Bag Filter ◽  
High Concentration ◽  
High Concentrations ◽  
Selection Of

Related trials in the treatment of high concentration desulfurization dust were operated in order to optimize the parameters of bag filter, established a set of data fit to semi-dry flue gas desulfurization dust, processed simulated flue gas with a concentration of SO2 600mg/m3, adopt filtration velocity between 0.63 ~ 0.98m/min, injection pressure between 0.3 ~ 0.4MPa, injection time between 200 ~ 300s. The experiments proved that the selection of the filtration velocity about the treatment of high concentrations desulfurization dust should be distinguished from the general cases. In addition, pulse pressure also should not be too high.

pH Control of Flue Gas Desulfurization in Sintering Process with Pyrolusite

2013 ◽  
Vol 864-867 ◽  
pp. 1592-1597 ◽  
Author(s):  
Shui E Li ◽  
Fu Zhong Wu ◽  
Qian Wang
Keyword(s):  
Resource Utilization ◽  
Flue Gas ◽  
Ph Control ◽  
Flue Gas Desulfurization ◽  
Low Grade ◽  
Sintering Process ◽  
Ph Buffering ◽  
Long Period ◽  
Desulfurization Process ◽  
Buffering Agent

The effect of rhodochrosite as the annexing agent of pH of pyrolusite slurry on desulfurization and manganese leaching was studied. The influence of the byproduct of sulfuric acid in the sintering flue gas desulfurization process on desulfurization and resource utilization of absorbent was also investigated. The results show that rhodochrosite produced the same effect as a pH buffering agent. High desulfurization and manganese leaching rates were maintained for a long period. This study showed the possibility of resource utilization of low-grade rhodochrosite.

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