Usefulness assessment of automatic air flow control system with oxygen sensor in a 20 kW boiler with periodic wood pellet supply

IF 0.8 4区农林科学 Q3 MATERIALS SCIENCE, PAPER & WOOD

Drewno Pub Date : 2016-01-01 DOI:10.12841/wood.1644-3985.174.08

M. Juszczak, W. Cichy, Katarzyna Pałaszyńska

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引用次数: 1

Abstract

The benefits of applying automatic air flow control system with oxygen sensor in a 20 kW heating boiler with a retort furnace supplied periodically with wood pellets were examined. Boiler combustion chamber was not lined with ceramic blanket and therefore the fuel supply cycle duration (operation and stand-by) was set by the producer to just 20 seconds. Variation in time of carbon monoxide, nitric oxide, nitrogen oxides and oxygen concentrations in the flue gas, as well as correlations between: pollutant concentrations and temperature in the combustion chamber or oxygen concentration, temperature in the combustion chamber and oxygen concentration, nitric oxide and carbon monoxide concentrations were compared for different scenarios: with automatic air flow control and with constant air flow. It was concluded that applying automatic air flow control system with oxygen sensor did not significantly reduce carbon monoxide concentration (only by 10-15%). Most probably it is because the stand-by in fuel feeding is too short for the air supply fan to react. In order to reduce carbon monoxide concentration, instead of applying automatic air flow control it is preferable to obtain higher heat outputs (above 60% of its maximum value) and use higher capacity water heat storages.

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含氧传感器气流自动控制系统在20kw木屑颗粒周期性供应锅炉上的有效性评价

研究了带氧传感器的自动气流控制系统在20 kW蒸馏炉定期供应木屑颗粒的加热锅炉上的应用效果。锅炉燃烧室没有内衬陶瓷毯，因此燃料供应周期持续时间(运行和备用)由生产商设置为仅20秒。比较了自动气流控制和恒定气流两种不同工况下烟气中一氧化碳、一氧化氮、氮氧化物和氧气浓度的时间变化，以及污染物浓度与燃烧室温度或氧气浓度、燃烧室温度与氧气浓度、一氧化氮和一氧化碳浓度之间的相关性。结果表明，采用带氧传感器的自动气流控制系统对一氧化碳浓度的降低效果不显著(仅为10-15%)。最有可能的原因是燃料补给中的备用时间太短，送风风扇无法反应。为了降低一氧化碳浓度，最好是获得更高的热量输出(超过其最大值的60%)和使用更高容量的水储热器，而不是应用自动气流控制。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Drewno MATERIALS SCIENCE, PAPER & WOOD-

CiteScore

1.10

自引率

12.50%

发文量

审稿时长

>12 weeks

期刊介绍： Wood. Research papers. Reports. Announcements" ("Drewno") is an international scientific journal that publishes original results of innovatory basic and applied research concerning technological, technical, economic and ecological issues important for the wood science and forest-based industries, including their environment, and interesting to the international recipients. "Drewno" is an Open Access biannual journal. Aims and scope: wood science: anatomy, biology, chemistry, physics wood mechanical and chemical technology, inter alia, sawmilling, composite wood products, wooden construction, furniture making, wood pulp, paper making material engineering, biocomposites, nanocomposites material management environmental protection, safety of the processes, products and working stations biotechnology bioenergy, biofuels forestry: harvesting and wood quality wood-based industries economics The Editorial Board of the journal especially welcomes articles concerning increase in wood resources (wood mobilisation); innovative composites and lignocellulosic materials; new trends in the protection, modification and finishing of wood; biorefining of raw wood material; "green" building; new technologies of wood waste recycling; sustainable development; innovation management; and business networks.