Dry-method shock cooling removal and recovery method for arsenic in metallurgical gas
A technology of smelting flue gas and quenching, applied in separation methods, chemical instruments and methods, gas treatment, etc., can solve the problems of complex technology, generation of dirty acid, large investment in dirty acid treatment, etc., and achieve the effect of simple arsenic removal process
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Embodiment 1
[0013] The outlet temperature of the waste heat boiler in a copper smelter is 400°C, and the arsenic content in the flue gas is 1200-1800 mg / m 3 , the dust concentration is 18-22 g / m 3 , the flue gas volume is 10000 m 3 / h; the flue gas is introduced into the high-temperature resistant ceramic filter dust collector, the outlet temperature after dust removal is 370°C, and the content of arsenic in the flue gas is 1200-1800 mg / m 3 , the dust concentration is 5-12 mg / m 3 ;The flue gas after dedusting enters from the bottom of the circulating fluidized bed, and the bottom of the fluidized bed is a funnel bin;
[0014] The fluidized bed particle medium is concrete particles, and the medium particles are continuously transported from the lower end of the circulating fluidized bed to the heat exchanger for cooling during the heat exchange process, and then added to the upper part of the circulating fluidized bed after cooling for flue gas cooling.
[0015] After the concrete parti...
Embodiment 2
[0017] The outlet temperature of waste heat boiler in a non-ferrous metal smelter is 380 ℃, and the content of arsenic in the flue gas is 2300-2500 mg / m 3 , the dust concentration is 20-25 g / m 3 , the flue gas volume is 8000 m 3 / h. The flue gas is introduced into the high-temperature resistant ceramic filter dust collector, the outlet temperature after dust removal is 365°C, and the content of arsenic in the flue gas is 2300-2500 mg / m 3 , the dust concentration is 10-15 mg / m 3 . The flue gas after dedusting enters from the bottom of the circulating fluidized bed, and the bottom of the fluidized bed is a funnel bin;
[0018] The granular medium of the fluidized bed is quartz sand. During the heat exchange process, the medium particles are continuously transported from the lower end of the circulating fluidized bed to the heat exchanger for cooling. After cooling, they are added to the upper part of the circulating fluidized bed for flue gas cooling.
[0019] After the qua...
Embodiment 3
[0021] The outlet temperature of waste heat boiler in a non-ferrous metal smelter is 380 ℃, and the content of arsenic in the flue gas is 1200-1500 mg / m 3 , the dust concentration is 18-30 g / m 3 , the flue gas volume is 15000 m 3 / h. The flue gas is introduced into the high-temperature resistant ceramic filter dust collector, the outlet temperature after dust removal is 370°C, and the arsenic content in the flue gas is 1200-1500 mg / m 3 , the dust concentration is 10-15 mg / m 3 . The flue gas after dedusting enters from the bottom of the circulating fluidized bed, and the bottom of the fluidized bed is a funnel bin.
[0022] The fluidized bed particle medium is alumina particles, and the medium particles are continuously transported from the lower end of the circulating fluidized bed to the heat exchanger for cooling during the heat exchange process, and then added to the upper part of the circulating fluidized bed after cooling for flue gas cooling.
[0023] After the flue...
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