A PILOT-SCALE EXPERIMENT FOR ZERO LIQUID DISCHARGE AND RESOURCE RECOVERY OF FLUE GAS DESULFURIZATION WASTEWATER IN COAL-FIRED POWER PLANTS

XU Min; DU Hongyu; GUO Jiaming; ZHAO Xiaodan; LU Wei; SUN Chao; CHEN Yu; ZHOU Zhen

doi:10.13205/j.hjgc.202210023

Volume 40 Issue 10

Oct. 2022

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2022 > 40(10): 169-175

XU Min, DU Hongyu, GUO Jiaming, ZHAO Xiaodan, LU Wei, SUN Chao, CHEN Yu, ZHOU Zhen. A PILOT-SCALE EXPERIMENT FOR ZERO LIQUID DISCHARGE AND RESOURCE RECOVERY OF FLUE GAS DESULFURIZATION WASTEWATER IN COAL-FIRED POWER PLANTS[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(10): 169-175. doi: 10.13205/j.hjgc.202210023

Citation:

XU Min, DU Hongyu, GUO Jiaming, ZHAO Xiaodan, LU Wei, SUN Chao, CHEN Yu, ZHOU Zhen. A PILOT-SCALE EXPERIMENT FOR ZERO LIQUID DISCHARGE AND RESOURCE RECOVERY OF FLUE GAS DESULFURIZATION WASTEWATER IN COAL-FIRED POWER PLANTS[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(10): 169-175. doi: 10.13205/j.hjgc.202210023

Citation:

XU Min, DU Hongyu, GUO Jiaming, ZHAO Xiaodan, LU Wei, SUN Chao, CHEN Yu, ZHOU Zhen. A PILOT-SCALE EXPERIMENT FOR ZERO LIQUID DISCHARGE AND RESOURCE RECOVERY OF FLUE GAS DESULFURIZATION WASTEWATER IN COAL-FIRED POWER PLANTS[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(10): 169-175. doi: 10.13205/j.hjgc.202210023

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A PILOT-SCALE EXPERIMENT FOR ZERO LIQUID DISCHARGE AND RESOURCE RECOVERY OF FLUE GAS DESULFURIZATION WASTEWATER IN COAL-FIRED POWER PLANTS

doi: 10.13205/j.hjgc.202210023

1. Nantong Power Plant, Huaneng International Power Jiangsu Energy Development Co., Ltd, Nantong 226003, China;
2. College of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai 201306, China

Received Date: 2021-08-06

Abstract

Abstract

Based on characteristics of wastewater and resource recovery, a zero liquid discharge process of flue gas desulfurization wastewater, combined with graded salt separation pretreatment, membrane concentration and electrolytic chlorine production unit, was constructed. A pilot-scale experiment was conducted for 35 d at a flow rate of 500 L/d. The results suggested that effective removal of pollutants and resource recovery could be achieved with suspended solid, Mg²⁺, SO^2-₄ and Ca²⁺ removal of 100%, 96.6%, 99.8% and 98.9%. The purity of CaSO₄, Mg(OH)₂, ettringite and CaCO₃ precipitate were 86.9%, 99.8%, 88.3% and 99.9%, which were suitable to be utilized as desulfurization gypsum, dephosphorization agent, flame retardant and desulfurizer. NaClO obtained from electrolytic chlorine production could satisfy the requirement of type A, class Ⅲ in China's National Standard GB 19106-2013, which was applicable to disinfection, sterilization and water treatment.
- desulfurization wastewater,
- zero discharge,
- graded salt separation,
- resource recovery,
- electrolytic chlorine production

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References

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