Improving of Boiler Efficiency by Controlling the Harmful Substances Concentration in the Combustion Products

Szkarowski, A.; Janta-Lipińska, S.

doi:10.30540/sae-2018-033

Cited by 5 publications

(6 citation statements)

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“…According to Pudlik [76], the value of the λ coefficient depends on the installation and the type of fuel being burned; in the case of biomass, its value is 2.0-2.5. The best combustion effects are obtained in boilers equipped with automatic control of the fuel/air blow ratio, where the λ coefficient is 1.02−1.03 [77].…”

Section: The Process Of Combustion Of Pellets With the Addition Of El...mentioning

confidence: 99%

Effect of the Addition of Elderberry Waste to Sawdust on the Process of Pelletization and the Quality of Fuel Pellets

Obidziński,

Cwalina,

Kowczyk-Sadowy

et al. 2024

Energies

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This paper presents the results of a study on the process of the pelletization of pine sawdust with the addition of herbaceous waste from elderberry, in the working system of a pellet press with a flat matrix, in the context of producing fuel pellets. Based on the research, the impact of the addition of herbal waste in the form of elderberry waste on the granulation process of pine sawdust and the assessment of the quality of the obtained pellets were determined. The addition of herbaceous waste from elderberry to pine sawdust had a beneficial effect on the kinetic durability of the obtained fuel pellets, with an increase of up to approximately 1.3% (from 98.03 to 99.31%). Based on the obtained results, it can be concluded that the mechanical strength of all the tested pellets is higher than 97.5%, which is consistent with the ISO 17225-1:2021-11 standard. The bulk density of pellets with the addition of herbaceous waste from elderberry increased (from 649.34 to 658.50 kg∙m−3) as did their density (from 1231.38 to 1263.90 kg∙m−3). The addition of herbaceous waste from elderberry in amounts ranging from 10% to 20% did not have a significant effect on the power requirements of the pelletizer, which decreased compared to the pelletization process of pure pine sawdust. The percentage of this decrease compared to the pelleting process with pure pine sawdust was approximately 10%. The addition of herbaceous waste from elderberry to pine sawdust slightly reduces the energy value (i.e., the heat of combustion and the calorific value) of the obtained pellets. The addition of 30% elderberry waste resulted in a decrease in the heat of combustion from 20.27 to 19.96 MJ·kgd.m.−1, while the calorific value of the pellets decreased from 19.98 to 18.69 MJ·kgd.m.−1 compared to pine sawdust pellets. Hence, adding herbaceous waste from elderberry seems to be a good way of managing large amounts of waste of this kind generated in herbal processing plants. This method of waste management opens new perspectives towards more sustainable and economically effective energy production.

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Section: The Process Of Combustion Of Pellets With the Addition Of El...mentioning

confidence: 99%

Effect of the Addition of Elderberry Waste to Sawdust on the Process of Pelletization and the Quality of Fuel Pellets

Obidziński,

Cwalina,

Kowczyk-Sadowy

et al. 2024

Energies

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“…The authors have many years of experience in designing systems for dynamic control of fuel combustion quality in low and medium power boilers. The Fakel-2000 system was previously implemented in the boiler plant presented in this work [29,32,33]. A feature of this dynamic control system is the continuous maintenance of the boiler in optimal operating conditions in terms of economic and ecological fuel combustion.…”

Section: Problem Analysismentioning

confidence: 99%

“…To achieve this goal, a method of dynamic control of the combustion process is proposed to ensure the maximum possible efficiency of the boiler, taking into account environmental protection conditions. This method is based on controlling the "fuel-air" ratio based on current information about the oxygen and carbon monoxide content in the exhaust gases [31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Improving the Fuel Combustion Quality Control System in Medium Power Boilers

Janta-Lipińska,

Shkarovskiy,

Chrobak

2024

Energies

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The constant development of electronic devices and components allows for older systems (which have been well received) with electronic control of combustion processes in municipal thermal energy to be improved to new levels, with significant economic and ecological effects. This article presents details of the development of an improved natural gas combustion quality control system in the modernized DKVR 6.5-13 steam boiler. This paper presents the results of comparative tests of this boiler obtained for various variants of the system operation. It has been proven that maximum boiler efficiency indicators and minimum toxicity of exhaust gases discharged into the atmosphere can be achieved by using a proposed control system. The system uses the regulated residual chemical underburning method, based on simultaneous control of the oxygen and carbon dioxide content in the exhaust gases. As a result of the use of the proposed method, an increase in boiler efficiency was achieved by 1.5–2.1% compared with standard automatic regulation and an increase by 0.3–0.8% compared with regulation based only on the oxygen content in the exhaust gases. These results were achieved by reducing the excess air coefficient. In addition, nitrogen oxide emissions were reduced by 25–30%, which, with a justified safe carbon monoxide content in exhaust gases of up to 250 ppm, reduced the exhaust gas toxicity index to 20%.

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“…This is confirmed by Oleniacz [89], stating that the type of waste introduced into the installation has a significant impact on the type and amount of air pollutants arising from the combustion process. The best economic and ecological effect is obtained by using boilers equipped with automatic fuel-air ratio control systems, where λ is 1.02-1.03 [90].…”

Section: Combustion Testsmentioning

confidence: 99%

The Utilization of Plum Stones for Pellet Production and Investigation of Post-Combustion Flue Gas Emissions

et al. 2020

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Agri-food waste is generated at various food cycle stages and is considered to be a valuable feedstock in energy systems and chemical syntheses. This research identifies the potential and suitability of a representative agri-food waste sample (i.e., plum stones) as a solid fuel. Ground plum stones containing 10, 15, and 20 wt.% of rye bran were subjected to pelletization. The pelletizer was operated at 170, 220, and 270 rpm, and its power demand for the mixture containing 20 wt.% of rye bran was 1.81, 1.89, and 2.21 kW, respectively. Such pellets had the highest quality in terms of their density (814.6 kg·m−3), kinetic durability (87.8%), lower heating value (20.04 MJ·kg−1), and elemental composition (C: 54.1 wt.%; H: 6.4 wt.%; N: 0.73 wt.%; S: 0.103 wt.%; Cl: 0.002 wt.%; O: 38.2 wt.%). Whole plum stones and pellets were subjected to combustion in a 25 kW retort grate boiler in order to determine the changes in the concentrations of NO, SO2, CO, CO2, HCl, and O2 in the post-combustion flue gas. Collected results indicate that plum stone–rye bran pellets can serve as effective substitutes for wood pellets in prosumer installations, meeting the Ecodesign Directive requirements for CO and NO.

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Improving of Boiler Efficiency by Controlling the Harmful Substances Concentration in the Combustion Products

Cited by 5 publications

References 0 publications

Effect of the Addition of Elderberry Waste to Sawdust on the Process of Pelletization and the Quality of Fuel Pellets

Effect of the Addition of Elderberry Waste to Sawdust on the Process of Pelletization and the Quality of Fuel Pellets

Improving the Fuel Combustion Quality Control System in Medium Power Boilers

The Utilization of Plum Stones for Pellet Production and Investigation of Post-Combustion Flue Gas Emissions

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