Flue gas conditioning for reducing suspended particulate matter from thermal power stations

Shanthakumar, S.; Singh, Devendrá; Phadke, R. C.

doi:10.1016/j.pecs.2008.04.001

Cited by 67 publications

(39 citation statements)

References 40 publications

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“…The authors previously proposed the novel process for SO 3 production on the basis of the application of novel platinum (Pt)-containing catalysts at the fiberglass supports. 7,8 The process flow sheet and feasibility analysis have demonstrated that the optimal technological solution is a separate compact unit for production of SO 3 from elemental sulfur with further injection of SO 3 to the flue gas duct ( Figure 1).…”

Section: The Proposed Processmentioning

confidence: 99%

“…Vanadia catalysts, which are low in price and have more than 70 years of experience in commercial application of SO 2 oxidation, 6 may be successfully applied in this process. 3 However, the catalytic reactor for the described sidestream process (compared with the conventional industrial SO 2 oxidation converter) will be characterized with relatively small volume, leading to an unavoidable rise of relative heat losses into the environment and thus causing the formation of temperature nonuniformities and cold zones in the catalyst beds. Under such conditions, vanadia catalysts may suffer significant deactivation, so the development of catalysts with improved low-temperature activity and operation stability is an important challenge for the described SO 2 oxidation process.…”

Section: The Proposed Processmentioning

confidence: 99%

“…Although some decrease of coal consumption in Russia was observed in the 1990s, it is projected that coal's share of fuel usage in the country will be increased because of the rise of natural gas prices. A large amount of the coal used in Russian power plants has an ash content that exceeds 40 wt %, thus providing the fly ash content in flue gases up to 60 -70 g/m 3 . Therefore, the particulate matter (PM) retention in the flue gas is still a rather urgent problem.…”

Section: Introductionmentioning

confidence: 99%

“…This may be accomplished by an ESP upgrade technique known as flue gas conditioning. Injecting small concentrations (2-10 parts per million [ppm]) of sulfur trioxide (SO 3 ) is a proven way to condition the flue gas for improved ESP performance. [3][4][5] The surface-absorbed SO 3 (or sulfuric acid [H 2 SO 4 ]) is very electrically conductive and effectively lowers the resistance of the bulk fly ash.…”

Section: Introductionmentioning

confidence: 99%

“…Injecting small concentrations (2-10 parts per million [ppm]) of sulfur trioxide (SO 3 ) is a proven way to condition the flue gas for improved ESP performance. [3][4][5] The surface-absorbed SO 3 (or sulfuric acid [H 2 SO 4 ]) is very electrically conductive and effectively lowers the resistance of the bulk fly ash. Controlled catalytic oxidation of sulfur dioxide (SO 2 ) may be a cost-effective upgrade to condition the flue gas for improved ESP performance.…”

Section: Introductionmentioning

confidence: 99%

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Novel Catalytic Process for Flue Gas Conditioning in Electrostatic Precipitators of Coal-Fired Power Plants

Zagoruiko

Бальжинимаев

Vanag

et al. 2010

Journal of the Air & Waste Management Association

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One of the most important environmental protection problems for coal-fired power plants is prevention of atmospheric pollution of flying ash. The ash particles are typically removed from flue gases by means of electrostatic precipitators, for which the efficiency may be significantly increased by lowering the resistance of fly ash, which may be achieved by controlled addition of microamounts of sulfur trioxide (SO 3 ) into the flue gases. This paper describes the novel technology for production of SO 3 by sulfur dioxide (SO 2 ) oxidation using the combined catalytic system consisting of conventional vanadium catalyst and novel platinum catalyst on the base of silicazirconia glass-fiber supports. This combination provides highly efficient SO 2 oxidation in a wide temperature range with achievement of high SO 2 conversion. The performed pilot tests have demonstrated reliable and stable operation, excellent resistance of the novel catalytic system to deactivation, and high overall efficiency of the proposed process. The scale of the plant was equivalent to the commercial prototype; therefore, no further scale-up of the oxidation process is required.

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Section: The Proposed Processmentioning

confidence: 99%

Section: The Proposed Processmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Novel Catalytic Process for Flue Gas Conditioning in Electrostatic Precipitators of Coal-Fired Power Plants

Zagoruiko

Бальжинимаев

Vanag

et al. 2010

Journal of the Air & Waste Management Association

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Computational Fluid Dynamics Modeling for Urea Hydrolysis in a Batch Reactor for Flue Gas Conditioning

Sahu¹,

Hussain²,

Meikap³

2011

Chem Eng & Technol

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A computational fluid dynamics (CFD) model is proposed to simulate urea hydrolysis for ammonia synthesis as a safe feed stock to flue gas conditioning in thermal power plants. A series of parametric studies to investigate flow rates, thermal boundary conditions, and reactor geometry was performed and operating conditions and reactor geometry were optimized. Detailed 3D flow, heat, and chemistry simulations of ammonia were carried out with predicted conversions comparable to measurements and the dependence of the experiments on the reaction parameters was evaluated. Through simulation under the same conditions the output was generated and compared to the experimental plot. Profiles of temperature and flow patterns were successfully achieved through simulation.

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Effect of flue gas conditioning on the cohesive forces in fly ash layers in electrostatic precipitation

Alonso-Fariñas

Lupión

Cañadas

2015

Env Prog and Sustain Energy

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Flue gas conditioning (FGC) systems are an effective option for improving the performance of electrostatic precipitators (ESP). The effect of FGC on the cohesive forces in ash layers during electrostatic precipitation has been studied for a complete range of ash compositions. Cohesive forces have been determined by means of a laboratory apparatus specifically developed within this research work. SO 3 and NH 3 have been tested as conditioning agents.It is concluded that the effect of injecting NH 3 on the cohesive properties is variable, and depends on the type of ash. The mechanism of NH 3 adsorption, influenced by the carbon content in ash, appears to play an important role. On the other hand, SO 3 addition involves the reduction of the cohesive forces in all the cases tested.

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Flue gas conditioning for reducing suspended particulate matter from thermal power stations

Cited by 67 publications

References 40 publications

Novel Catalytic Process for Flue Gas Conditioning in Electrostatic Precipitators of Coal-Fired Power Plants

Novel Catalytic Process for Flue Gas Conditioning in Electrostatic Precipitators of Coal-Fired Power Plants

Computational Fluid Dynamics Modeling for Urea Hydrolysis in a Batch Reactor for Flue Gas Conditioning

Effect of flue gas conditioning on the cohesive forces in fly ash layers in electrostatic precipitation

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