Desulfurization and denitrification method for sintering machine flue gas
A technology of sintering flue gas, desulfurization and denitrification, applied in the field of desulfurization and denitrification, can solve the problems of secondary pollution and high operating costs
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Embodiment 1
[0046] 1.16 million cubic meters of flue gas at 140°C, with a nitrogen oxide content of 500mg / m 3 , the sulfide content is 200 mg / m 3 , the flue gas enters and cools down to 50°C through spraying, the spraying water is recycled, and part of the wastewater is neutralized before going to the biochemical system; the cooled flue gas passes through the demisting equipment and 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 specification of the adsorption tower is 4.8 meters in diameter and 12.0 meters in height; after the flue gas removes sulfides and some nitrogen oxides, it is heated to 200°C and enters the denitrification tower. Under the action of ZSM-5 molecular sieve catalyst, the remaining Nitrogen oxides are reduced to nitrogen, and the flue gas after the reaction enters the waste heat boiler to generate st...
Embodiment 2
[0048] 1.5 million cubic meters of flue gas at 130°C, with a nitrogen oxide content of 400mg / m 3 , the sulfide content is 100 mg / m 3 , the flue gas enters the spray and cools down to 40°C, the spray water is recycled, and part of the wastewater is neutralized before going to the biochemical system; the cooled flue gas passes through the demisting equipment and 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 ZSM-5 molecular sieve; the adsorption tower has a diameter of 4.8 meters and a height of 12.0 meters; after the flue gas removes sulfides and some nitrogen oxides, it is heated to 200°C and enters the denitrification tower. Under the action of the ZSM-5 molecular sieve catalyst, The remaining nitrogen oxides are reduced to nitrogen, and the flue gas after the reaction enters the waste heat boiler to generate steam, and th...
Embodiment 3
[0050] 1.14 million cubic meters of flue gas at 120°C, with a nitrogen oxide content of 450mg / m 3 , the sulfide content is 200 mg / m 3 , the flue gas enters the denitrification tower, and at 300°C, under the action of the copper-supported ZSM-5 molecular sieve catalyst, the nitrogen oxides are reduced to nitrogen, and the flue gas after the reaction enters the waste heat sintering to generate steam at 160°C, and the flue gas enters the self-exchange The heater exchanges heat with the cold flue gas entering the chimney, and the temperature drops to about 110°C; the temperature of the flue gas at 110°C is reduced to about 110°C through the flue gas; the temperature of the flue gas at 110°C is cooled to 50°C by spraying, and the spraying The water is recycled, part of the waste water is neutralized, and then goes to the biochemical system; the cooled flue gas passes through the demisting equipment and enters the adsorption tower; three 200m 3 The adsorption tower, two open and on...
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