Low-temperature desulfurization and denitrification method for coke oven flue gas
A desulfurization and denitrification, flue gas technology, applied in the field of desulfurization and denitrification, can solve the problems of high operating cost and secondary pollution
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Embodiment 1
[0044] 160,000 cubic meters of flue gas at 240°C, with a nitrogen oxide content of 500mg / m 3 , the sulfide content is 200 mg / m 3 , enter the waste heat boiler to generate steam, and the temperature of the flue gas is reduced to about 180°C; the flue gas at 180°C is cooled to 50°C by spraying, the spray water is recycled, and part of the waste water is neutralized and then removed to the biochemical system; After the flue gas passes through the demisting equipment, it enters the adsorption tower; three 200m 3 The adsorption tower, two open and one standby, each adsorption tower is filled with 120m 3 Microcrystalline material, total 360 m 3 Microcrystalline material mordenite; the adsorption tower has a diameter of 4.8 meters and a height of 12.0 meters; after the flue gas removes sulfides and nitrogen oxides, it enters the self-heat exchanger, and after heat exchange with the hot flue gas, it reaches above 100°C and enters the chimney emission, the nitrogen oxide content in ...
Embodiment 2
[0046] The specific implementation is as attached figure 1 The shown device flow, 150,000 cubic meters of flue gas at 260°C, the nitrogen oxide content is 400mg / m 3 , the sulfide content is 100 mg / m 3 , into the waste heat boiler to generate steam at 150°C, and the temperature of the flue gas is reduced to about 120°C; the flue gas at 120°C is cooled to 40°C by spraying, and the spray water is recycled, and part of the waste water is neutralized and then removed to the biochemical system; the temperature is lowered The final flue gas enters the adsorption tower after passing through the demisting equipment; three 200m 3 The adsorption tower, two open and one standby, each adsorption tower is filled with 120m 3 Microcrystalline material, total 360 m 3 Microcrystalline material ZSM-5 molecular sieve; the specification of the adsorption tower is 4.8 meters in diameter and 12.0 meters in height; after the flue gas removes sulfide and nitrogen oxides, it enters the self-heat exc...
Embodiment 3
[0048] The specific implementation is as attached figure 1 The device process shown, 140,000 cubic meters of flue gas at 140°C, the nitrogen oxide content is 450mg / m 3 , the sulfide content is 200 mg / m 3 , into the waste heat boiler to generate steam at 160°C, and the temperature of the flue gas is reduced to about 110°C; the flue gas at 110°C is cooled to 50°C by spraying, and the spray water is recycled, and part of the waste water is neutralized and then removed to the biochemical system; cooling The final flue gas enters the adsorption tower after passing through the demisting equipment; three 200m 3 The adsorption tower, two open and one standby, each adsorption tower is filled with 120m 3 Microcrystalline material, total 360 m 3 Microcrystalline material ZSM-5 molecular sieve; the specification of the adsorption tower is 4.8 meters in diameter and 12.0 meters in height; after the flue gas removes sulfides and nitrogen oxides, it enters the self-heat exchanger, and aft...
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