The study of a fiberglass furnace flue air pollutants and the economical saving from the application of a heat recovery system In a Fiberglass Factory

Subject Areas : environmental management

Hadi Neghahdari ¹ , Mohamad javad jafari jafari ² , farideh Atabi ³ , Gholamreza Baseri ⁴

1 - کارشناس ارشد دانشکده محیط زیست و انرژی، دانشگاه آزاد اسلامی، واحد علوم وتحقیقات تهران *(مسئول مکاتبات)
2 - دانشیار دانشکده بهداشت، دانشگاه علوم پزشکی شهید بهشتی
3 - استادیار دانشکده محیط زیست وانرژی، دانشگاه آزاد اسلامی، واحد علوم وتحقیقات تهران.
4 - مربی گروه مهندسی پلیمر - صنایع پلیمر، دانشگاه آزاد اسلامی واحد داراب.

Received: 2009-08-11 Accepted : 2010-01-17 Published : 2012-12-21

Keywords: Fiberglass factory, Suspended Particle, Heat recovery, Furnace, Social cost,

Abstract :

The fiberglass furnace flue discharges not only a variety of air pollutants but also a tremendous amount of heat. Its’ high discharged air temperature, limits the application of a cost effective dust collector. The application of a heat recovery system seems not only to make it possible for application of a cost effective dust collector but also may reduce heating costs considerably. In the present study, the air pollutants discharged from a fiberglass furnace flue were measured and evaluated. In the next step, the reduced fuel and social costs were estimated if a proposed heat recovery system was applied. For this purpose, five air pollutants including CO, CO2, NO, NO2, NOx, and air velocity were measure using TESTO 350XL. Particulate matter (PM) was also monitored using TCR TECORA ISO TRACK, all through direct readings. Temperature was monitored automatically through installed instrumentation at the furnace control room. More than nine hundred thousand air temperature readings were screened to select 2043 reliable readings. The recovered heat was estimated using the measured data. Direct and indirect savings from the recovered heat was predicted using the Environmental software. The results revealed that the average concentration of CO, NOx, and PM were respectively 1.45, 1.38 and 6.477 times higher than environmental permissible limits. The recovered heat was equivalent to almost 1500 million cubic meters of natural gas saving per year which costs 24.4 million US$. The extraction  of  statistic  data  and  research  hypothesis  test  was  done  by  Mini Tab 14  software. The  data  of  mean  society  examination (with  determined  variance)  and  mean  of  two  societies  and  also  probability  plot  used  for  contaminant  changes  forecast  in  the  next  years.