Calcium-based wet desulfurization process

• Main Authors: YANG QUANZHEN, NI WEI, SUN LONGCHUN, YAN BEI, ZHANG WENBIN, LIU XINGYA, FENG YIFEI, LU HONGWEN, BAO XIANHUA, CHEN TAIHUA, GAO HUAJIN, NI FEI
• Format: Patent
• Language: Chinese; English
• Published: 26.10.2016
• Subjects: CHEMISTRY; METALLURGY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TRANSPORTING; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

A calcium-based wet desulfurization process relates to a flue gas system, an absorbent slurry preparation system, a gypsum dewatering system and a waste water treatment system, wherein the flue gas system comprises a desulfurization tower and a heat exchanger; the heat exchanger is arranged near a purified flue gas outlet in the desulfurization tower; a coarse flue gas inlet and a coarse flue gas outlet are formed in two sides of the heat exchanger; coarse hot flue gas enters the desulfurization tower through the coarse flue gas inlet; waste heat of the coarse hot flue gas is utilized to reheat purified flue gas, so that the emission capability of the purified flue gas outlet is enhanced; part of water treated by the waste water treatment system serves as industrial water used for preparation of absorbent slurry, the other part of the water treated by the waste water treatment system returns to a slurry groove in the desulfurization tower, so that on one hand, the slurry flows constantly for circulation to av