Combustion Characteristics of Coal for Pulverized Coal Injection (PCI) Blending with Steel Plant Flying Dust and Waste Oil Sludge

Wang, Yu; Zou, Chong; Zhao, Junxue; Wang, Fei

doi:10.1021/acsomega.1c02554

Cited by 5 publications

(4 citation statements)

References 46 publications

(77 reference statements)

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“…Increasing production efficiency is a very important issue in the energy sector because it is associated with fuel savings, as well as with reducing the amount of pollutants emitted per unit of generated energy. One possibility of increasing the energy efficiency of boilers is the use of modifiers (catalysts) that can be added to fuels [8]. They improve the effectiveness, efficiency, and speed of the combustion process, e.g., by burning heavier hydrocarbon fractions that are formed during fuel combustion and thus by reducing the loss of incomplete combustion.…”

Section: New Combustion Catalystsmentioning

confidence: 99%

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Pulverized Coal-Fired Boilers: Future Directions of Scientific Research

et al. 2023

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The paper provides an outlook on future directions of research and the possible applications for pulverized coal-fired boilers. One potential direction for future research is to focus on the ways to improve the efficiency of pulverized coal-fired boilers. This could involve developing new combustion technologies that are able to more thoroughly burn the coal and produce less waste or finding ways to capture and use the excess heat that is generated during the combustion process. The pulverized coal combustion process in power boilers is still being improved by the preliminary cleaning of coal and the use of various catalytic additives. Another area of research that could be valuable is the development of advanced control systems and monitoring technologies for pulverized coal-fired boilers. These systems could be used to optimize the performance of the boiler and ensure that it is operating at maximum efficiency while also providing real-time data on the condition of the boiler and any potential problems that may arise. The analysis of literature shows that several future paths of development and scientific research related to the technology of pulverized coal combustion in boilers can be distinguished.

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Section: New Combustion Catalystsmentioning

confidence: 99%

“…The aspect that needs to be optimized is the appropriate amount of added catalyst. There are many limitations related to the selection of additives, e.g., the common problem of the high price of catalytic materials, as well as the fact that some of them cause corrosion or contaminate combustion products [8].…”

Section: New Combustion Catalystsmentioning

confidence: 99%

Pulverized Coal-Fired Boilers: Future Directions of Scientific Research

et al. 2023

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“…Many researchers dealt with coal char particles of different sizes in a series of experimental research. − Different ignition temperature of char, ignition delay time, burning temperature, and burning time were investigated at different environment temperatures. Higuera calculated the combustion rate, resistance, and other parameters of a single coal char particle in O 2 and CO 2 .…”

Section: Introductionmentioning

confidence: 99%

Simulation Study on the Interaction between Chemically Reacting Double Coal Char Particles

Shi

Zhang

et al. 2023

ACS Omega

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Due to the complex atmosphere of the entrained flow gasifier, it is difficult to obtain reactivity properties of coal char particles under high-temperature conditions by experiment. The computational fluid dynamics simulation method is a key way to simulate the reactivity of coal char particles. In this article, the gasification characteristics of double coal char particles under H 2 O/ O 2 /CO 2 atmosphere are studied. The results show that the particle distance (L) has an influence on the reaction with particles. With the gradual increase of L, the temperature first rises and then falls among the double particles due to the migration of the reaction area, and the characteristics of double coal char particles gradually approach that of single coal char particles. The particle size also has an influence on the gasification characteristics of coal char particles. As the particle size varies from 0.1 to 1 mm, the reaction area of particles becomes smaller at high temperature and finally attaches to the surface of the particles. The reaction rate and carbon consumption rate increase with increasing particle size. As the size of double particles is changed, the reaction rate trend of double coal char particles at the same particle distance is basically the same, but the change degree of reaction rate is different. With the increase of the distance between coal char particles, the change of the carbon consumption rate is larger for the small particle size.

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“…The blends of coals and individual coals that were used were analysed for their chemical properties. Often coal blends are selected based on cost and availability, but for stable operation, it is common to make incremental changes to blends as opposed to macro changes [72]. Coal B was low-volatile bituminous coal and was a component of all the blends.…”

Section: Coalmentioning

confidence: 99%

Optimising Carbon Type Differentiation Techniques to Reduce Dust Emissions in Blast Furnace Ironmaking

Lewis¹

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The manufacturing process of iron, using the blast furnace (BF) generates dust as a byproduct, which is recycled, however, the generation of the dust in excess is undesirable.A comprehensive review of the dust has determined that each of the raw materials for blast furnace ironmaking contributes to its formation, including several forms of carbon thus addressing the hypothesis 'The raw materials that feed the blast furnace are expelled into the gas stream and all influence the blast furnace dust.' The current technique for quantifying coal originating carbon type mostly in the form of coal char, referred to as the nominal term Low Order Carbon (LOC) within BF dust consists of thermogravimetric analysis (TGA) however, this technique does not allow for samples of dust to be analysed in a timely manner, in line with the ever-changing conditions of the blast furnace. In this work, the TGA method has been trialled for use with BF dust, with improvements offered to the heating profile, allowing for faster analysis.Moreover, alternative techniques have been trialled, in combination with various characterisation methods such as X-ray diffraction, Scanning Electron Microscopy, total carbon and Optical Emission Spectroscopy. The 'Winkler Method' which was originally designed to quantify charcoal in soil sediment has been successfully adapted and optimised to suit LOC quantification in BF dust, showing a good correlation with the original benchmark technique. This answered the hypothesis, 'Thermal techniques can be used to differentiate carbon sources in dust generated in blast furnaces that use granulated coal injection.' The techniques for LOC quantification were applied to dust samples spanning a 9 month period. to determine the process parameters that influence the LOC presence within the dust. It was found that the resolution of sampling is key to identify relationships between process parameters and LOC within the dust. A novel technique to continuously monitor the dust output of the furnace found that the dust output and the LOC within the dust are related, where the increasing dust output leads to increasing concentrations of LOC within the carbon profile of the dust itself. Process parameters including blast pressure, blast volume, and production rate were considered to increase the dust output from the furnace based on the work of the dust probe, thus answering the hypothesis 'Coal combustion in the raceway can be impacted by process parameters and the evidence can be found in the fingerprint of blast furnace dust.' A node mapping exercise was used to model an ideal set of process conditions for low dust operations. The foundations to make macro advances in carbon and dust output reduction in blast furnace ironmaking are laid out in this thesis. iii Acknowledgements The academic guidance provided by Dr Hollie Cockings has been totally faultless, her enthusiasm for the subject has kept me motivated throughout this thesis and her direction has been second to none. My gratitude to the staff of the Materials and Manuf...

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Combustion Characteristics of Coal for Pulverized Coal Injection (PCI) Blending with Steel Plant Flying Dust and Waste Oil Sludge

Cited by 5 publications

References 46 publications

Pulverized Coal-Fired Boilers: Future Directions of Scientific Research

Pulverized Coal-Fired Boilers: Future Directions of Scientific Research

Simulation Study on the Interaction between Chemically Reacting Double Coal Char Particles

Optimising Carbon Type Differentiation Techniques to Reduce Dust Emissions in Blast Furnace Ironmaking

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