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A horizontal and vertical two-stage reactor for sodium based dry desulfurization

Jining Zhongtai Coal Chemical Co., Ltd

Coke oven flue gas enters the sodium based (NaHCO3) dry desulfurization (sodium based dry) dust removal integrated system. The flue gas first enters the sodium based desulfurization reactor, and the ultra-fine sodium bicarbonate powder is injected into the sodium based dry desulfurization reactor. The ultra-fine sodium bicarbonate powder decomposes into highly active sodium carbonate and carbon dioxide under the action of high-temperature flue gas. The highly active Na2CO3 is fully contacted with SO2 and other acidic media in the flue gas to produce chemical reaction and be absorbed and purified. After desulfurization, the powdery particle products enter the bag filter with the air flow to collect the desulfurization by-products. The integrated technology of sodium based (NaHCO3) dry desulfurization (sodium based dry) dust removal mainly includes flue gas system, pulverizing and spraying system, bag dust removal system, post-product treatment system, compressed air system and electrical instrument system.

After desulfurization and dust removal, the particulate matter in the purified flue gas is ≤ 10mg / Nm3 (dry basis), the emission concentration of sulfur dioxide is ≤ 30mg / Nm3 (dry basis), the temperature drop of flue gas is within 10 ~ 20 ℃, the moisture content does not increase, and the utilization rate of sodium bicarbonate is more than 85%.