Full-scale study on halloysite fireside additive in 230 t/h pulverized coal utility boiler

Kalisz, Sylwester; Ciukaj, Szymon; Mroczek, Kazimierz; Tymoszuk, Mateusz; Wejkowski, Robert; Pronobis, Marek; Kubiczek, Henryk

doi:10.1016/j.energy.2015.03.062

Cited by 27 publications

(12 citation statements)

References 13 publications

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“…However, the local contents of H2, CO or SO3 as well as the reagent droplets' residence time are not measured in industrial practice. Generally, only the temperature distribution at the SNCR system level is measured through acoustic [7] or HVT pyrometers [12]. Therefore the flue gas temperature is the only variable in the proposed correlations.…”

Section: The Results Of Approximationmentioning

confidence: 99%

Simplified method for calculating SNCR system efficiency

et al. 2017

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Abstract. SNCR (Selective Non-Catalytic Reduction) technology is aimed at reducing NOx emissions. SNCR efficiency is appropriately high only for the reaction temperature range called 'the SNCR temperature window'. It is a narrow temperature range defined in various ways in the literature, which makes it difficult to evaluate the DeNOx system's efficiency. Therefore, this study attempts to approximate the relationship between SNCR system efficiency and the flue gas temperature. The approximation was performed on the basis of literature data and verified using data from an experiment. Measurements were performed in a Polish boiler with a maximum continuous rating of 230 t/h. The verified, evaluated function could be used to forecast efficiency of SNCR systems in existing units that use urea or ammonia as a reagent. The approximation results are polynomial functions that depend on flue gas temperature, which fit the literature data with the coefficient of determination R 2 = 0.83-0.86. Therefore, these equations could be used by the designer or operator of the boiler for preliminary determination of current SNCR system efficiency.

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Section: The Results Of Approximationmentioning

confidence: 99%

Simplified method for calculating SNCR system efficiency

et al. 2017

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“…The biomass and non-biomass concentrations (in the dry state) were determined by the weight method, according to PN- Fouling and slagging risk. The most popular indices (parameters) which describe the slagging and fouling risk of the reactor are [20][21][22]:…”

Section: Methodsmentioning

confidence: 99%

Significant waste properties in terms of applicability in the power industry

Nowak¹,

Stelmach²,

Sajdak³

2019

Environ. Protect. Eng.

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The aim of the article is to present the physical and chemical properties of the refuse derived fuel (RDF) substrates, which have a significant impact on the energy recovery process in power plants. The experimental part includes technical (moisture and ash content, net and gross calorific values) and elemental analyses (sulfur, chlorine and mercury content), biomass and non-biomass concentration in the samples. In order to carry out the analysis of reactor slagging and fouling risk, chemical composition of the ash and characteristic ash fusion temperatures were determined. The waste samples are heterogeneous material and their properties are diversified-the moisture content ranges from 1.8 to 29.2 wt. %, the net calorific value from 17.231 to 28.

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“…If these problems appear, they can be minimized by using aluminosilicate fuel additives, such as halloysite, kaolin or bentonite. Their positive influence on plant-origin biomass and coal combustion has already been studied and successfully proven [55][56][57].…”

Section: Feedstock and Ash Characteristicsmentioning

confidence: 99%

Properties of Animal-Origin Ash—A Valuable Material for Circular Economy

2022

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In the presented paper, two types of animal-origin biomass, cow dung and chicken litter, are characterized in terms of combustion-related problems and ash properties. It was found that these parameters strongly depend on the farming style. Whether it is cow dung or chicken litter, free-range raw materials are characterized by higher ash contents than industrial farming ones. Free-range samples contain chlorine at lower levels, while industrial farming samples are chlorine rich. Free-range samples are characterized by the predominant content of silica in the ash: 75.60% in cow dung and 57.11% in chicken litter, while industrial farming samples contain more calcium. Samples were classified by 11 “slagging indices” based on the ash and fuel composition to evaluate their tendencies for slagging, fouling, ash deposition and bed agglomeration. Furthermore, an assessment was made against the current EU law regulations, whether the ashes can be component materials for fertilizers. The phosphorus concentration in the investigated ashes corresponds to 4.09–23.73 wt% P2O5 and is significantly higher in industrial chicken litter samples. The concentrations of Hg, Cu, As, Ni, Cd and Pb in all samples are below the limits of the UE regulations. However, concentrations of Cr in all samples and Zn in industrial chicken litter exceed these standards.

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Full-scale study on halloysite fireside additive in 230 t/h pulverized coal utility boiler

Cited by 27 publications

References 13 publications

Simplified method for calculating SNCR system efficiency

Simplified method for calculating SNCR system efficiency

Significant waste properties in terms of applicability in the power industry

Properties of Animal-Origin Ash—A Valuable Material for Circular Economy

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