بررسی آزمایشگاهی و بهینه‌سازی عملکرد رسوب‌دهندۀ الکترواستاتیک

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشگاه اصفهان

2 دانشگاه شیراز

چکیده

در این پژوهش عملکرد یک رسوب­دهندۀ الکترواستاتیک استوانه­ای تک‌مرحله‌ای برای جداسازی ذرات گچ و نمک با قطر متوسط ذرات 180 و 290 نانومتر از جریان هوا به‌صورت آزمایشگاهی موردبررسی قرارگرفته است. اثر خواص ساختاری، اندازۀ ذرات و مقاومت ویژۀ الکتریکی و مشخصه‌های عملیاتی، اختلاف‌پتانسیل،­ قطر الکترود تخلیه، سرعت جریان هوا و جریان الکتریکی بر بازده جداسازی بررسی شد. نتایج نشان می­دهد بازده جداسازی ذرات گچ بیشتر از نمک است. در محدودۀ اختلاف پتانسیل 6 تا 10 کیلوولت، جرقه مشاهده نشد، پس با افزایش اختلاف پتانسیل می­توان به بازده بالاتری رسید. افت بازده با افزایش سرعت جریان هوا برای ذرات گچ بیشتر از نمک است که نشان می­دهد برای ذرات نمک می­توان در سرعت بالاتر هم به‌صورت اقتصادی عمل کرد. بازده بهینۀ سامانه توسط روش سطح پاسخ برای ذرات گچ در سرعت­های 2/1 و 2 متر برثانیه به­ترتیب 6/88 و 60 درصد و برای ذرات نمک در همین سرعت­ها به­ترتیب 8/72 و 68 درصد تعیین شد. این مقدارها با نتایج تجربی تأیید شدند.

کلیدواژه‌ها


عنوان مقاله [English]

Experimental Investigation and Optimization of the Performance of an Electrostatic Precipitator

نویسندگان [English]

  • M. Rokni 1
  • M. Hojjat 1
  • M. R. Talaie 1
  • S. F. Aghamiri 2
1 University of Isfahan
2 University of Isfahan
چکیده [English]

In the present, study the performance of a single-stage cylindrical electrostatic precipitator for separation of gypsum and salt particles in the air was experimentally investigated. The average diameter of salt and gypsum particles are 198 and 290 nm, respectively. The effect of structural properties, i.e., particle size and specific electrical resistance and operating conditions, i.e., voltage, the diameter of discharge electrode, air velocity, and electric current on the collection efficiency were investigated. Results show that the collection efficiency for gypsum particles is more than that of the salt particles. In the voltage range of 6 to 10 kV, sparks didn’t occur so, by increasing the voltage obtaining higher values of efficiency is possible. The decrease in efficiency by an increase in air velocity for gypsum particles is higher than that of salt particles, which show that for salt particles operation at higher flow rates is economically possible. Optimum collection efficiencies of gypsum particles at gas velocities of 1.2 and 2 m/s were determined by response surface method to be 88.6% and 60%, respectively. Corresponding values for salt particles are 72.8% and 68%, respectively. experimental results verified these values.

کلیدواژه‌ها [English]

  • Electrostatic Precipitator
  • corona discharge
  • optimization
  • Particles Separation
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