Study on Hg Removal Characteristics of Fabric Filter

doi:10.12096/j.2096-4528.pgt.21028

Abstract

Abstract:

Fabric filter is an important industrial dust control equipment. Through the combination of mechanism analysis, measured data research and engineering measurement, the Hg removal performance of fabric filter was studied. The results show that the fabric filter can remove most of the particulate Hg while removing dust efficiently, and the removal efficiency is between 95% and 100%. Due to the differences in inlet gaseous Hg concentration and unburned carbon content of fly ash, the removal efficiency of gaseous Hg by fabric filter varies greatly, but some test data also reach more than 90%. The actual measurement of a 15 MW circulating fluidized bed (CFB) boiler fabric filter was studied, the removal efficiencies of gaseous Hg, particulate Hg and total Hg were found to be 82.14%, 99.88% and 98.44%, respectively, and the Hg balance coefficient of the system was 91.38%. The research results can provide some reference for subsequent Hg emission control of industrial flue gas.

Key words: coal-fired power plant, fabric filter, Hg removal, emission control, removal efficiency

CLC Number:

TK 09

Hanxiao LIU, Gaofei GUO. Study on Hg Removal Characteristics of Fabric Filter[J]. Power Generation Technology, 2023, 44(2): 193-200.

Figures/Tables 8

Fig. 1 Dust collect and removal principle of fabric filter

Fig. 2 Mechanism of Hg removal

Fig. 3 Hg removal performance of fabric filter in coal-fired power plant

Fig. 4 Hg removal performance of electrostatic fabric filter in coal-fired power plant

Fig. 5 Hg removal performance of fabric filter in cement plant

Fig. 6 Process flow diagram

Tab. 1 Test instruments

序号	仪器名称	型号	规格	厂家
1	大气压力表	Testo 622	—	—
2	烟尘采样仪	3012H	—	青岛崂应
3	等速采样管	—	5 m	青岛崂应
4	烟气测试仪	3022	—	青岛崂应
5	采样枪	—	加热120 ℃、除湿	M&C
6	电子天平	AE-100	0.01 mg	瑞士梅特勒
7	汞分析仪	RA-915F	—	鲁梅克斯
8	烟气汞综合采样器	ZR-3700A	—	青岛众瑞

Fig. 7 Hg removal performance of fabric filter

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