Evaluation of the electron beam flue gas treatment process to remove SO2 and NOx emission from coal thermal power plants in Turkey

Bilge Ocak S.

IAEA-SM-, cilt.366, sa.155, ss.120-122, 2001 (Hakemli Dergi)

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 366 Sayı: 155
  • Basım Tarihi: 2001
  • Dergi Adı: IAEA-SM-
  • Derginin Tarandığı İndeksler: Other Indexes
  • Sayfa Sayıları: ss.120-122
  • Gazi Üniversitesi Adresli: Hayır

Özet

The emission of sulfur dioxide (SO2, also SO3) and nitrogen oxides (NO, NO2, called NOX) from burning fossil fuel, especially coal which is used to produce energy (electricity and heat) is one of the most important sources of environmental and air pollution. These pollutants are known as "acid gases" causing acid rain and also "indirect greenhouse gases" contributing greenhouse effect. Acid rain damages forest, agriculture fields, flora, lakes and river by acidifying the soil and water. Turkey is a party to many international environmental agreements such as Air pollution, Hazardous Wastes, Ozone Layer Protection and etc. [1]. Turkey is seeking admission on the European Union (EU) and trying to meet EU standards. Therefore to control SO2 and NOX emission and reduce the level of acid gases has become an ever-increasing problem in Turkey. Turkey is requiring Flue Gas Desulfurization (FGD, deSOa) technology on all newly commissioned coal thermal power plants units and retrofitted onto older units. The wetscrubbing limestone/gypsum process was preferred as FGD technology. This process was commissioned in the 2x150 MWe Cayirhan 1-2, 1x210 MWe Orhaneli, 2x160 MWe Cayirhan 3-4 (with plant), 1x157 MWe Kangal (with plant) and is under construction in the 3x210 MWe Kemerkoy, 2x210 MWe Yenikoy and 3x210 MWe Yatagan [2]. Combustion technology is used to control NOX emission from all existing power plants. On the other hand, new technologies are investigated and developed for industrial scale commercial viability. One of them is electron beam flue gas treatment process (electron beam FGT) which is dry scrubbing process and simultaneously removes SO2 and NOX, and useful by-product for agriculture fertilizer [3,4] In this study, both the current energy consumption and production and SO2 and NOX emission in Turkey is analyzed. The electron beam FGT is compared with preferred limestone/gypsum wet-scrubbing process and evaluated for each power plant [5]. As can be shown from Table 1, the investments and the operational costs of electron beam FGT are higher than preferred conventional FGD except 1x210 MWe Orhaneli plant. As a result, if investment and operational costs are reduced, the electron beam FGT may be solution reduction both SO2 and NOX emission from small to mid-sized coal thermal power plants in the future.