Technical and Economic Optimization of Cogeneration Technology Using Combustion and Gasification

Lisý, Martin; Baláš, Marek; Špiláček, Michal; Skála, Zdeněk

doi:10.14311/ap.2014.54.0042

Cited by 9 publications

(2 citation statements)

References 6 publications

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“…The parameters of this process tend to be unstable due to external influences and faults entering the process [1]. These effects of instability of the extrusion process are described in detail in the works [2][3][4][5][6]. In order to achieve fast and continuous extrusion and a quality final product, it is necessary to harmonize the control of the speed ratios on the screw and the temperature ratios in the extruder.…”

Section: Screw Extrusion Processmentioning

confidence: 99%

Mathematical design theory of screw extruder used for additive manufacturing

Matúš¹,

Beniak²,

Križan³

et al. 2020

Global J. Eng. Tech. Adv.

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Additive manufacturing as the technology of the future brings new challenges. One of them is the economic efficiency of production. This paper focuses on the mathematical analysis and structural design of extrusion screw used for additive manufacturing. The primary objective is to analyze the screw tool geometry and determine a procedure for its design, specifically the theory involved with the pressing tool and force relations which are necessary for the verification of the proposed tool geometry and its strength analysis. Procedures for determining frictional performance of the screw press are used in designing the drive of the screw extruder of 3D printer. Familiarity with the above mentioned procedures forms the basis for research into new tool - screw that will improve the service life and competitiveness of the technology.

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Section: Screw Extrusion Processmentioning

confidence: 99%

Mathematical design theory of screw extruder used for additive manufacturing

Matúš¹,

Beniak²,

Križan³

et al. 2020

Global J. Eng. Tech. Adv.

View full text Add to dashboard Cite

show abstract

“…Water acts both as a binding agent and a lubricant. The moisture present in the biomass facilitates starch gelatinization, protein denaturation, and fiber solubilization processes during extrusion, pelleting, or briquetting [6,8,12,14]. Water helps develop Van der Waals' forces by increasing the area of contact between particles, according to [15].…”

Section: Introductionmentioning

confidence: 99%

Effects of Initial Moisture Content on the Production and Quality Properties of Solid Biofuel

et al. 2015

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Abstract. The moisture content of densified biomass is a limit parameter influencing the quality of the solid biofuel. It influences its calorific value, density, mechanical strength and dimensional stability as well as the production process of this biofuel. The paper deals with the experimental research of the effect of moisture content of densified material on the final quality of biofuel in the form of logs. Experiments based on the single-axis densification of spruce sawdust were realized by hydraulic piston press, where the densified logs were produced under room temperature. The effect of moisture content on the quality properties of the logs, including density, change of moisture, expansion and physical changes, were studied. The results show the necessary moisture ranges for producing good-quality logs. The experiments were evaluated and the moisture content of the tested material was optimized to achieve the optimum value for the best quality of the solid biofuel.

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Sewage sludge and digestate gasification in an atmospheric fluidized bed gasifier

Elbl

Baláš

Lisý

et al. 2023

Biomass Conv. Bioref.

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The gasification of sewage sludge (SS) and digestate was investigated in a pilot-scale fluidized bed gasifier with an output of 100 kWt. The treatment of these by-products is an ongoing challenge for sustainable development. SS and digestate are most commonly used as fertilizers. However, regulations restrict their use, mainly because of the content of heavy metals, pathogens and bacteria. Gasification of these by-products instead of application to agricultural land seems to be more efficient, as the syngas can subsequently be used for combined heat and power (CHP) generation. A series of measurements were carried out to get a better understanding of the gasification process of these fuels and to study the effects of gasifying agent on the syngas composition, particulate matter (PM) and tar. The produced syngas and tar were analyzed using a gas chromatograph with mass spectrometry (GC–MS). The results showed that no ash slagging was observed and therefore it is feasible to operate digestate and SS gasification at 750°C. The lower heating value (LHV) of the syngas from digestate and SS with air as the gasifying agent is comparable, 4.06 MJ·Nm−3 for digestate and 4.11 MJ·Nm−3 for SS. The addition of steam had a positive effect on the amount of tar and the tar dew point, which was below 150°C. Tar reduction in digestate was 5037.3 mg·Nm−3 to 3566.3 mg·Nm−3 and in SS 7447.7 mg·Nm−3 to 3390.3 mg·Nm−3. Furthermore, the concentrations of the individual tar compounds were determined and subsequently divided into tar classes.

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Technical and Economic Optimization of Cogeneration Technology Using Combustion and Gasification

Cited by 9 publications

References 6 publications

Mathematical design theory of screw extruder used for additive manufacturing

Mathematical design theory of screw extruder used for additive manufacturing

Effects of Initial Moisture Content on the Production and Quality Properties of Solid Biofuel

Sewage sludge and digestate gasification in an atmospheric fluidized bed gasifier

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