关键词: 硫化钠, 芒硝, 技术改造

Abstract: The production of sodium sulphide by Glauber coal-reduction process has been considered as the high pollution and high energy consumption process. In allusion to the problems of Glauber-coal reduction process，some technical recon- struction measurements，including ladder use of calcining furnace exhaust heat，conservation of electricity，dust-removal and desulfurization of flue gas，and  high-efficient coal combustion etc.，were put forward. Results showed comparing to the original process，the improved process made the coal save by 44% and product cost save by RMB 200 Yuan per ton.A sodium sulphide production system with annual output of 20 000 t could save up to RMB 4 million Yuan per year.At the same time, the dust and SO2 emissions accorded with the national discharge standard.Therefore，it realized the purpose of ‘improve efficiency by downsizing staff’，and ‘energy saving and emission reduction’.

Key words: sodium sulphide, glauber, technical reconstruction