Co-absorption and Reduction Mechanism of SO2 and NO2 from Flue Gas Using a Na2SO3 Solution with an Oxidation Inhibitor

2021 ◽  
Author(s):  
Yongpeng Ma ◽  
Jiandong Wang ◽  
Dongli Yuan ◽  
Xiaojing Zhang ◽  
Zan Qu ◽  
...  
Keyword(s):  
Flue Gas ◽  
Reduction Mechanism ◽  
Oxidation Inhibitor

scholarly journals Effect of catalyst on tail gas during reduction of vanadium-titanium magnetite carbon-containing pellet

2021 ◽  
Vol 267 ◽  
pp. 02046
Author(s):  
Bo Wang ◽  
Xueyong Ding ◽  
Xiaofei Zhang ◽  
Tianhua Ju ◽  
Shigang Li
Keyword(s):  
Rotary Kiln ◽  
Flue Gas ◽  
Reduction Process ◽  
Reduction Mechanism ◽  
Gas Analyzer ◽  
Metallization Rate ◽  
Vanadium Titanium ◽  
Reduction Effect ◽  
Calcium Catalysts ◽  
Titanium Magnetite

Catalyst can enhance the reduction effect and promote the reduction of vanadium titanomagnetite. In this paper, the carbon-containing pellets of vanadium titanomagnetite were prepared by using highly volatile coal as the reducing agent under the background of a novel process of pre-reduction in the rotary kiln. The effects of CaO, CaCO3, B2O3 and borax (Na2B4O7·10H2O) on the tail gas characteristics of carbon-containing pellets in the prereduction process were studied by using a simulated rotary kiln and flue gas analyzer. The results showed that the enhanced reduction effect of boron catalysts was slightly stronger than that of calcium catalysts, among which CaO catalyzed the least and borax the best. With the increase of metallization rate, the CO utilization in the tail gas is generally reduced, while when using CaCO3 as the catalyst, the CO utilization is significantly increased. Due to different reduction mechanism, the boron catalysts have little effect on the tail gas, and the calcium catalysts have a great effect on the tail gas. Based on the experimental results and the characteristics of the tail gas from the reduction process, we put forward the idea of using CaCO3 as the best catalyst and using CaO to absorb CO2 in the tail gas to form CaCO3.

scholarly journals Thiosulfate as an Oxidation Inhibitor in Flue Gas Desulfurization Processes: A Review of R&D Results

1986 ◽  
Vol 36 (10) ◽  
pp. 1138-1146 ◽  
Author(s):  
Gary T. Rochelle ◽  
David R. Owens ◽  
John C. S. Chang ◽  
Theodore G. Bma
Keyword(s):  
Flue Gas ◽  
Flue Gas Desulfurization ◽  
Oxidation Inhibitor

Locomotive Boiler Flue Gas Analysis*

1912 ◽  
Vol 74 (1914supp) ◽  
pp. 159-160
Author(s):  
Lawford H. Fry
Keyword(s):  
Flue Gas ◽  
Gas Analysis

Could biomass-fueled boilers be operated at higher steam temperatures? Part 3: Initial analysis of costs and benefits

TAPPI Journal ◽  
2014 ◽  
Vol 13 (8) ◽  
pp. 65-78 ◽  
Author(s):  
W.B.A. (SANDY) SHARP ◽  
W.J. JIM FREDERICK ◽  
JAMES R. KEISER ◽  
DOUGLAS L. SINGBEIL
Keyword(s):  
Flue Gas ◽  
Power Plants ◽  
Superheated Steam ◽  
Black Liquor ◽  
Simulation Software ◽  
Operating Conditions ◽  
Costs And Benefits ◽  
Steam Generation ◽  
Fireside Corrosion ◽  
Corrosion Resistant

The efficiencies of biomass-fueled power plants are much lower than those of coal-fueled plants because they restrict their exit steam temperatures to inhibit fireside corrosion of superheater tubes. However, restricting the temperature of a given mass of steam produced by a biomass boiler decreases the amount of power that can be generated from this steam in the turbine generator. This paper examines the relationship between the temperature of superheated steam produced by a boiler and the quantity of power that it can generate. The thermodynamic basis for this relationship is presented, and the value of the additional power that could be generated by operating with higher superheated steam temperatures is estimated. Calculations are presented for five plants that produce both steam and power. Two are powered by black liquor recovery boilers and three by wood-fired boilers. Steam generation parameters for these plants were supplied by industrial partners. Calculations using thermodynamics-based plant simulation software show that the value of the increased power that could be generated in these units by increasing superheated steam temperatures 100°C above current operating conditions ranges between US$2,410,000 and US$11,180,000 per year. The costs and benefits of achieving higher superheated steam conditions in an individual boiler depend on local plant conditions and the price of power. However, the magnitude of the increased power that can be generated by increasing superheated steam temperatures is so great that it appears to justify the cost of corrosion-mitigation methods such as installing corrosion-resistant materials costing far more than current superheater alloys; redesigning biomassfueled boilers to remove the superheater from the flue gas path; or adding chemicals to remove corrosive constituents from the flue gas. The most economic pathways to higher steam temperatures will very likely involve combinations of these methods. Particularly attractive approaches include installing more corrosion-resistant alloys in the hottest superheater locations, and relocating the superheater from the flue gas path to an externally-fired location or to the loop seal of a circulating fluidized bed boiler.

Latent heat recovery from actual flue gas

2002 ◽  
Author(s):  
Masahiro Osakabe ◽  
Sachiyo Horiki ◽  
Tsugue Itoh ◽  
Ikuya Haze
Keyword(s):  
Latent Heat ◽  
Flue Gas ◽  
Heat Recovery ◽  
Actual Flue Gas

FLUE GAS PURIFICATION FROM SULFUR OXIDES AND ASH DURING SOLID FUEL COMBUSTION IN LOW-POWER BOILERS

2020 ◽  
Vol 21 (4) ◽  
pp. 355-374
Author(s):  
S. V. Plashykhin ◽  
T. V. Bojko ◽  
D. N. Skladannyy ◽  
Ju. A. Zaporozhets ◽  
Artem S. Safiants
Keyword(s):  
Low Power ◽  
Solid Fuel ◽  
Flue Gas ◽  
Fuel Combustion ◽  
Sulfur Oxides ◽  
Gas Purification ◽  
Solid Fuel Combustion ◽  
Flue Gas Purification
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