Abstract:

According to the requirements issued by Ministry of Environmental Protection, Development and Reform Commission and Energy Bureau, ultralow emission transformation on coalfired power plant was carried out. After transformation, there are circulating pump vibration, alloy tray fragmentation, partial blowoff of denitrification catalyst, abrasion and corrosion of lowlow temperature heat exchanger and frequent failures of dust collector in desulfurization and denitrification dust collector system. Problems in desulfurization and denitrification devices,lowlow temperature heat exchanger and dust collector after the transformation are listed.By analyzing, a reasonable location for suction end of circulating pump is added ,and an oxidation fan is put into use before the operation of desulfurization system to prevent the slurry clogging at exhaust gas nozzles.The countermeasures are provided for the reference of the industry peers, in order to improve the operation of environmental protection equipment and to meet the environmental requirements of ultralow emissions.

Key words:

font-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">coalfont-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">font-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">fired power plant, ultrafont-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">font-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">low emission transformation, environmental protection equipment, circulating pump, denitrification catalyst;desulfurization system