Application of centrifugal dust removal and demisting technology with condensation wet film in WFGD system

Huadian Technology ›› 2018, Vol. 40 ›› Issue (10): 65-68.

Previous Articles Next Articles

Application of centrifugal dust removal and demisting technology with condensation wet film in WFGD system

1.Demister(Shanghai) Environmental Technology Company Limited,Shanghai 200120, China; 2.Huadian Inner Mongolia Energy Company Limited,Baotou 014000, China

Online:2018-11-26 Published:2018-12-13

Abstract

Abstract:

In order to fulfill the requirement of thermal power units’ ultralow emission, the mass concentration of dust in flue gas should be lower than 5mg/m3 and the mass concentration of slurry should be lower than 20mg/m3, which request a 70% removal rate on average among various exhausted flue gas particles whose diameters are smaller than 3.5μm. However, the ordinary demist device and the wet electrostatic precipitator afterwards in the desulfurization system can barely remove the nanoscale particles in the flue gas. According to the principle of condensed phase transition which can cool the wet flue gas after desulfurization, a centrifugal dust removal and demisting technology with condensation wet film is recommended.The precipitated water vapor can ‘capture’the micronsized particles which can form large droplets after recondensing and be removed by the demister. This technology can effectively remove particulate matter (dust, slurry) smaller than 3.5μm in flue gas, and at the same time take into account the liquid level balance of desulfurization tower, save water consumption in the system, and significantly improve units’ economic efficiency.

Key words:

thermal power station, WFGD, flue gas and dust, ultralow emission, condensation phase transition, dustremoval and demisting, water saving

ZHANG Hongbin1, ZHAO Xiaokun2, CHENG Zijian1, XIA Liang1, GONG Lei1.

Application of centrifugal dust removal and demisting technology with condensation wet film in WFGD system

[J]. Huadian Technology, 2018, 40(10): 65-68.

[1]	MA Shuangchen1，GONG Chunqin1，GU Tao2，SUN Yao1，HE Chuan2，. Characteristics of water quality and quantity of flue gas recovery water from coal-fired#br# power plants and analysis of utilization methods of recycled water #br# [J]. Huadian Technology, 2020, 42(3): 45-51.
[2]	XU Jialing, BAO Jingjing, YU Jianghuai, LUO Ziling, SUN Licheng. Study on the characteristics of Hg⁰ re-emission and mercury removal by ionic liquid in WFGD systems [J]. Huadian Technology, 2020, 42(10): 41-47.
[3]	YANG Yonglong, SU Qiufeng, WANG Fengji, et al.. Integrated technology to treat poisoned slurry of limestonegypsum WFGD system [J]. Huadian Technology, 2015, 37(5): 70-71.
[4]	NIE Pengfei;MA Lei;ZHANG Peng. Experimental Research on operation optimization of desulphurization system of 600MW unit [J]. Huadian Technology, 2011, 33(9): 72-76.
[5]	NIE Pengfei;ZHANG Hongyu. Treatment of leakage points of bypass flue in wet flue gas desulphurization system under the condition of it′s without sut up gasgas heater [J]. Huadian Technology, 2011, 33(2): 70-73.
[6]	DENG Huipeng;SHEN Yuhui. Analysis for the gypsum dewatering system of flue gas desulphurization technical reformation project in Xisaishan Power Plant [J]. Huadian Technology, 2010, 32(6): 72-75.
[7]	ZHI Guoqing;YANG Ye. Analysis on Operation of Limestone-gypsum WFGD Equipments [J]. Huadian Technology, 2008, 30(6): 52-56.

Application of centrifugal dust removal and demisting technology with condensation wet film in WFGD system

PDF

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 7

Recommended Articles

Metrics

Comments