| 摘要: | 隨著工業革命快速的發展，人類的科技水平也大幅度的進步，伴隨著人類科技的進步，所消耗能源也越來越多。各國早期均以燃煤發電為主，這也直間造成了全球環境的議題，如溫室氣體排放、能源危機、環境污染等等。隨著先進燃煤機組IGCC與PFBC被學者們相繼提出，高溫氣體淨化技術應用於在先進燃煤機組可以大幅增加熱力學上的顯能，且有效降低整體技術成本等優點。高溫氣體淨化技術中，移動式顆粒床過濾器已被前人驗證可用於去除粉塵儲焦油；且顆粒床過濾器具有耐高溫、耐酸鹼、低壓損並可以連續操作下、過濾效率高等優點。
本研究基於前人所開發之移動式顆粒床過濾器，將其應用於去除多種汙染氣，並針對其性能進行探討。本研究濾材使選用經濟性的石灰石，使用7500ppmw粉塵濃度和500ppmv二氧化硫當作汙染氣，並於顆粒床過濾器出口處安裝氣體分析儀和線上粉塵與粒徑量測系統(ppc)進行線上量測，以評估整體顆粒床過濾器性能。
本實驗研究了表面風速、入口溫度、加熱溫度與濾材質量流率對整體除塵脫除硫的過濾效率影響。實驗結果顯示顆粒床體加熱溫度至800°C和表面風速為30 cm/s時濾材的脫硫效率可達98%。除塵效率可達98.3%；在150g/min的質量流率下有較佳的除塵效果；脫流方面隨濾材質量流率愈慢，脫硫效率有升高之趨勢，這是由於濾材在床體內被充分加熱而導致。
從吸附硫份後的濾材進行探討，在床體加熱溫度600°C和800°C的實驗條件下，從EDX組份分析中，濾材硫份從0.11%到1.11%這也直接說明顆粒床本體加熱對脫硫性能及其重要。表面風速30cm/s、40cm/s和45cm/s的濾材硫份比，30cm/s的濾材硫份較高，這也說明低風速對於移動式顆粒床過濾器之脫硫有較佳的性能。
關鍵字：移動式顆粒床過濾器、高溫氣體淨化、同步除塵除硫
;With the rapid development of the Industrial Revolution, human technological advancements have significantly progressed, leading to an increased consumption of energy. In the early stages, countries primarily relied on coal-fired power generation, which directly resulted in global environmental issues such as greenhouse gas emissions, energy crises, and environmental pollution. As advanced coal-fired units, such as IGCC and PFBC, were successively proposed by scholars, the application of high-temperature gas purification technology in these advanced coal-fired units has shown significant thermodynamic improvements and effective reduction of overall technical costs. Among the high-temperature gas purification technologies, the mobile granular bed filter has been verified by previous researchers for its ability to remove dust and tar, offering advantages such as high-temperature resistance, acid and alkali resistance, low pressure drop, and high filtration efficiency.
This study is based on the previously developed mobile granular bed filter and applies it for dust and sulfur removal, investigating its performance. Economically viable limestone is chosen as the filtering material, with a dust concentration of 7500 ppmw and a sulfur dioxide concentration of 500 ppmv used as the contaminated gas. Gas analyzers and PPC (Process Particle Counter PPC-100) are installed at the outlet of the granular bed filter for online measurement to evaluate the overall performance of the filter.
The experimental study investigates the effects of wind speed, inlet temperature, heating temperature, and filtering material mass flow rate on the filtration efficiency for dust and sulfur removal. The experimental results show that heating the granular bed to 800°C with a wind speed of 30 cm/s achieves a sulfur removal efficiency of 98%. The dust removal efficiency can reach 98.3%. A better dust removal effect is observed at a mass flow rate of 150 g/min. Regarding desorption, a slower filtering material mass flow rate leads to an increased sulfur removal efficiency, attributed to the thorough heating of the filtering material inside the bed.
The study further examines the filtered material after sulfur adsorption. Under experimental conditions with bed heating temperatures of 600°C and 800°C, EDX component analysis reveals an increase in sulfur content from 0.13% to 1.11% in the filtering material, highlighting the importance of bed heating for desulfurization performance. A comparison of sulfur content between surface wind speeds of 30 cm/s to 45 cm/s shows higher sulfur content at 30 cm/s, indicating better desulfurization performance at lower wind speeds for the moving granular bed filter.
Keywords: Moving granular bed filter, High-temperature gas cleaning , Simultaneous dust and sulfur removal |
