Reasons for tangerine peel utilization in the composition of mixed fuels based on bituminous coal

S A Yankovsky,G V Kuznetsov,I V Cherednik,A A Tolokolnikov

doi:10.1088/1742-6596/1359/1/012136

S A Yankovsky, G V Kuznetsov + Show 2 more

Open Access

https://doi.org/10.1088/1742-6596/1359/1/012136

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Abstract

Application analysis of processed tangerine peel in a mixture with T grade coal (lean) as a fuel for hot water boilers is presented. Technical characteristics, as well as conditions and ignition delay times for such mixed fuels at different mass concentrations of the initial components, have been experimentally determined. The experiments were carried out in air at temperatures from 600 ° C to 800 ° C. Record of ignition and combustion processes of composite fuel samples was carried out using a high-speed video camera (image format — 1024 × 1024 pixels, frame rate — up to 1000000 per second), which ensures high discretization of the recording results of characteristic process times. A temperature limit has been identified for the stable ignition of such fuels. It has been established that an increase of tangerine peel proportion in the mixture leads to acceleration of ignition processes of the studied mixed fuels. Reasons for application of fuel mixtures based on bituminous coal and food waste in the small energy sector have been provided.

Highlights

Production of electricity and heat from combustion of coal in the furnaces of hot water boilers is relevant in the XXI century [1,2]
With an increase of the tangerine component to 50%, the ignition delay time of mixed fuel decreased in 3.4 times at temperature growth from 600°C to 800°C
Increase of the temperature in the combustion chamber to 800 ° C leads to a decrease of the ignition delay time to 4.1 s for homogeneous coal and to 2.04 s for mixed fuel pellets with a ratio of 50% / 50%

Summary

Introduction

Production of electricity and heat from combustion of coal in the furnaces of hot water boilers is relevant in the XXI century [1,2]. The main problem, the solution of which is necessary for development of pellet burning technologies, is that, as established by the results of studies [27], delay times of ignition of droplets and particles of any fuels (liquid [28], solid [29], slurry [30]) substantially depend on the size of the particles (or droplets). The larger these characteristic dimensions, the longer the ignition delay time, respectively. One of the main tasks in the development of technologies for manufacture and combustion of pellets is to establish links between ignition conditions and particle sizes at certain acceptable temperatures of the oxidizing environment (air)

Experimental section

Results and discussion

Conclusion