Methods of Increasing the Calorific Value of Fine Coal Waste

Hycnar, J. J.; Pasiowiec, P.; Tora, Barbara

doi:10.1007/978-3-319-40943-6_61

Cited by 4 publications

(4 citation statements)

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“…Practically all briquettes made with the use of other binders were characterized by mechanical durability significantly lower than the minimum assumed threshold (D U = 85%). Lime is often used as an additive to other binders to improve the strength of briquettes produced [12,15,21,22]. In our cases, addition of lime (both quicklime and hydrated lime, added separately) to the M1 binder caused deterioration of compressive strength and mechanical durability while for M2 binder a slight improvement was observed.…”

Section: Influence Of Binder Type On Briquette Qualitymentioning

confidence: 57%

Research on the Production of Composite Fuel on the Basis of Fine-Grained Coal Fractions and Biomass—The Impact of Process Parameters and the Type of Binder on the Quality of Briquettes Produced

et al. 2019

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This paper presents the partial results of a study on obtaining compacted fuel from fine-grained coal fractions and biomass. The aim of the study was to determine the impact of selected parameters of the extrusion process and the applied binder (mechanical durability and density of the products). The fuels were formulated using the extrusion process. Raw materials used in the research were: Fine-grained coal (flotation concentrates), biomass (hydrolytic lignocellulose), and a wide spectrum of organic and mineral binders and their compositions. During the investigations, the variable factors were the following: Extrusion pressure, preparation of the mixtures for extrusion (mixing time and temperature of the mixture), composition of the extruded mixtures (share of fine-grained coal and biomass and type of binder). It was found that it is possible to extrude mechanically durable briquettes from mixtures containing fine-grained coal products and biomass. Under the conditions of the experiment, the most favorable mechanical durability was characterized by briquettes containing in their composition 90% of coal and 6% of biomass (in relation to the dry state). The briquettes with the most favorable physico-mechanical properties were obtained using organic binders-Starch (based on wheat and potato starch) and cellulose derivatives. regulated the quality requirements for solid fuels [2], the requirements for fuels introduced to the market and used in households and combustion plants with a nominal thermal power lower than 1 MW. In addition to the abovementioned legal provisions, anti-smog resolutions of individual self-government bodies came into force, which, using the amendment introduced in art. 96 in the Act on Environmental Protection Law [3], regulate types of fuels that cannot be used in individual heating in their area. The quoted legal provisions in practice mean the elimination of flotation concentrates and coal sludges from the market, and consequently, from the primary market of boilers-Devices that do not meet the requirements for class 5 boilers in accordance with standard PN-EN 303-5:2012 [4] (practically: Manual feed boilers).The elimination of flotation concentrates and coal sludges from the market may cause them to be deposited in the environment and, consequently, affects the loss of their energy potential. In general, flotation is a process widely used in the processing of minerals, including coal [5,6]. This is particularly important for flotation concentrates, which are characterized by relatively good quality parameters, and their only drawback is very fine grain size that results in excessive emission of dust during the combustion. In turn, the withdrawal of manual feed boilers that do not meet the requirements for class 5 boilers according to PN-EN 303-5:2012 [4] will increase the number of automatic boilers used in individual heating, and thus increase the demand for fuel for them (mainly qualified fuels like eco pea coals and culm). Taking into account the emerging market potential resulting f...

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Section: Influence Of Binder Type On Briquette Qualitymentioning

confidence: 57%

Research on the Production of Composite Fuel on the Basis of Fine-Grained Coal Fractions and Biomass—The Impact of Process Parameters and the Type of Binder on the Quality of Briquettes Produced

et al. 2019

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“…The ash layer lying on the pipes is more susceptible to the deposition of subsequent particles, which in consequence causes a rapid increase of the sludge and enlargement of its size in relation to the sludge resulting from the combustion of coal alone. The tests carried out so far at the Polish Energy Concern (the group of power plants) have indicated that the co-combustion of biomass (up to 5%) with fine coal is practically possible in a non-investment way [60]. In the case of co-firing biomass in a proportion greater than 5%, it is necessary to build technological lines ensuring that this fuel is fed to the boiler in a coal-independent manner.…”

Section: Energy Use Of Green Solid Fuelsmentioning

confidence: 99%

Using Agglomeration Techniques for Coal and Ash Waste Management in the Circular Economy

Borowski¹,

Alsaqoor²,

Alahmer³

2021

Adv. Sci. Technol. Res. J.

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This is a scoping review of agglomeration techniques to obtain of solid bodies from particle waste-materials for their utilization. For this purpose, the granulation and briquetting of fine coal and fly ash were presented in detail. Many successful works on solid fuels production, with coal only, and also with the addition of biomass, were presented. During the solid fuel combustion in power boilers, significant amounts of ash are generated. The properties of fly ashes were taken into consideration, and different methods of their utilization were proposed to obtain a wide range of useful products. Consequently, the waste resources of coal and ash were fully utilized. In final remarks, it was concluded, that the agglomeration techniques play an important role in waste management, but particularly in the circular economy.

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“…The method of coal dust granulation to obtain a coal fuel for combustion in grate boilers is shown in Figure 1. The obtained fuel with the grain size exceeding 5 mm was characterized by a calorific value of 26-29 MJ/kg and the sulfur content of about 0.6% and ash below 15% [Hycnar 2015].…”

Section: The Issue Of Coal Sludge and Fine Coal Granulationmentioning

confidence: 99%

“…Coal granulation was used for the production of alternative solid fuel intended for combustion Figure 1. Scheme of fine coal granulation in order to obtain fuel for grate boilers combustion [Hycnar 2015] in fluidized bed furnaces. The use of granules as charge for stationary fluidized bed resulted in an increase of the combustion process efficiency [Zaostrovskii et al 2012].…”

Section: The Issue Of Coal Sludge and Fine Coal Granulationmentioning

confidence: 99%

The Use of Granulation to Reduce Dusting and Manage of Fine Coal

Ozga¹,

Borowski²

2018

J. Ecol. Eng.

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The development of mining and processing industries is accompanied by the formation of fine-grained waste materials that must undergo the treatment. Sometimes, grinding materials is a prerequisite for further processing. The issues of coal dust and fine coal granulation conducted to obtain homogeneous and persistent pieces for application in various branches of industry were presented. The article describes the binders and additives were applied in order to change the properties of the granules. The key factors affecting the process of fine-grained coal granulation is discussed. Granulated coal dust is most useful as an alternative fuel for combustion in industrial and household heating systems. However, carbon fuel requires a systematic control of the mechanical strength and resistance to external factors.

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Methods of Increasing the Calorific Value of Fine Coal Waste

Cited by 4 publications

References 1 publication

Research on the Production of Composite Fuel on the Basis of Fine-Grained Coal Fractions and Biomass—The Impact of Process Parameters and the Type of Binder on the Quality of Briquettes Produced

Research on the Production of Composite Fuel on the Basis of Fine-Grained Coal Fractions and Biomass—The Impact of Process Parameters and the Type of Binder on the Quality of Briquettes Produced

Using Agglomeration Techniques for Coal and Ash Waste Management in the Circular Economy

The Use of Granulation to Reduce Dusting and Manage of Fine Coal

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