化工学报
化工學報
화공학보
JOURNAL OF CHEMICAL INDUSY AND ENGINEERING (CHINA)
2014年
6期
2137-2147
,共11页
顾丛汇%吕士武%李瑞%鲁端峰%务文涛%袁竹林
顧叢彙%呂士武%李瑞%魯耑峰%務文濤%袁竹林
고총회%려사무%리서%로단봉%무문도%원죽림
单纤维丝%纤维集合体%模型%表面%PM2.5%模拟%过滤性能
單纖維絲%纖維集閤體%模型%錶麵%PM2.5%模擬%過濾性能
단섬유사%섬유집합체%모형%표면%PM2.5%모의%과려성능
fiber%fiber assembly%model%surface%PM2.5%simulation%filtration performance
在日常的生产和生活排放的残留物中存在许多有毒的 PM2.5细颗粒物，对人体呼吸功能损害大，因此研究如何有效去除PM2.5细颗粒物具有十分重要的意义。对不同尺寸“Y”形截面和圆形截面的单纤维丝对烟气中PM2.5颗粒物的过滤性能进行实验，分析不同烟气流速和颗粒物浓度对颗粒物截留率的影响，进而研究纤维集合体在不同单丝线密度和孔隙率的条件下对烟气中PM2.5颗粒物过滤性能的作用。结合Euler法和Lagrange法对上述单纤维丝和纤维集合体实验工况进行数值模拟，将其结果与实验数据进行对比发现实验与数值模拟结果吻合较好。研究结果表明，同一时刻“Y”形截面的单纤维丝比圆形截面单纤维丝对颗粒物截留率更高。对于纤维集合体，单丝线密度为0.27 tex和孔隙率为0.88工况下，纤维集合体对颗粒物PM2.5的捕集性能最好。
在日常的生產和生活排放的殘留物中存在許多有毒的 PM2.5細顆粒物，對人體呼吸功能損害大，因此研究如何有效去除PM2.5細顆粒物具有十分重要的意義。對不同呎吋“Y”形截麵和圓形截麵的單纖維絲對煙氣中PM2.5顆粒物的過濾性能進行實驗，分析不同煙氣流速和顆粒物濃度對顆粒物截留率的影響，進而研究纖維集閤體在不同單絲線密度和孔隙率的條件下對煙氣中PM2.5顆粒物過濾性能的作用。結閤Euler法和Lagrange法對上述單纖維絲和纖維集閤體實驗工況進行數值模擬，將其結果與實驗數據進行對比髮現實驗與數值模擬結果吻閤較好。研究結果錶明，同一時刻“Y”形截麵的單纖維絲比圓形截麵單纖維絲對顆粒物截留率更高。對于纖維集閤體，單絲線密度為0.27 tex和孔隙率為0.88工況下，纖維集閤體對顆粒物PM2.5的捕集性能最好。
재일상적생산화생활배방적잔류물중존재허다유독적 PM2.5세과립물，대인체호흡공능손해대，인차연구여하유효거제PM2.5세과립물구유십분중요적의의。대불동척촌“Y”형절면화원형절면적단섬유사대연기중PM2.5과립물적과려성능진행실험，분석불동연기류속화과립물농도대과립물절류솔적영향，진이연구섬유집합체재불동단사선밀도화공극솔적조건하대연기중PM2.5과립물과려성능적작용。결합Euler법화Lagrange법대상술단섬유사화섬유집합체실험공황진행수치모의，장기결과여실험수거진행대비발현실험여수치모의결과문합교호。연구결과표명，동일시각“Y”형절면적단섬유사비원형절면단섬유사대과립물절류솔경고。대우섬유집합체，단사선밀도위0.27 tex화공극솔위0.88공황하，섬유집합체대과립물PM2.5적포집성능최호。
With the rapid development of industrialization, a large number of toxic residues of PM2.5 are produced in the daily life. Due to its slow settling velocity and large quantity and surface area, PM2.5 is a carrier of pollutants and damages the respiratory function of body. It is important to study how to effectively remove PM2.5 in industrial production and daily life. The filtration performance of fibers with different sizes of Y-shaped and circular section is examined in this study, and the relation of particle retention to smoke speed and particle concentration is analyzed. The influence of density and porosity of fiber assembly on the filtration performance of PM2.5 is studied. Fiber and fiber assembly are simulated with Euler method and Lagrange method, and the numerical results are in good agreement with experimental data. The results on Y-shaped fiber show that higher linear density of fiber retains less particles at the same smoke speed and concentration, higher particle concentration leads to higher particle retention at the same linear density and speed, and higher speed of smoke gas gives higher particle retention at the same linear density and concentration. The retention with Y-shaped fiber section is better than that with circular section. The results on fiber assembly show that higher linear density of fiber improves the particle retention at the same porosity and larger porosity reduces the retention at the same linear density of fiber. The performance for PM2.5 filtration is better at linear density of fiber of 0.27 tex and fiber assembly porosity of 0.88.
