Circulation process for performing ammonium sulfite pulping by using sulfur-containing flue gas absorber
A technology of ammonium method and absorbent, applied in the field of recycling technology, can solve the problems of complex components, waste, cumbersome purification and refining links, etc.
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Embodiment 1
[0078] The flue gas is firstly dedusted by the electrostatic precipitator, and after the dedusted flue gas is pressurized by the induced draft fan, the amount of flue gas entering the induced draft fan is 310800m 3 / h, first enter the Venturi tube, the waste ammonia water tank is connected with the Venturi tube, spray 1-3% ammonia water into the Venturi tube to absorb the sulfur dioxide in the flue gas to obtain the ammonium bisulfite mixed liquid. And through the pH detection device and the sulfur dioxide detection device to adjust the injection amount of ammonia water to control the mass ratio of N / S to 39:64.
[0079] The flue gas mixture from the Venturi tube enters the liquid collection tank at the bottom of the desulfurization tower, where excessive ammonia water is injected to react with ammonium bisulfite to form ammonium sulfite. A mixture of ammonium bisulfite and ammonium sulfite ammonia is formed in the liquid collection tank. The mixture is pumped to the height of...
Embodiment 2
[0094] The flue gas first passes through the filter and dust removal equipment for dust removal. After the dust removal flue gas is pressurized by the induced draft fan, the amount of flue gas entering the induced draft fan is 200,000~400,000m 3 / h, into the liquid collection tank at the bottom of the desulfurization tower, spraying excess ammonia water with a concentration of 0.8-11% to react with ammonium bisulfite to generate ammonium sulfite. A mixture of ammonium bisulfite and ammonium sulfite ammonia is formed in the liquid collection tank, and the mixture is pumped to the height of the tower, and sprayed downward through the second-layer spray device in the middle of the tower, and the upward smoke The gas is evenly mixed to absorb the residual sulfur dioxide in the flue gas. Ammonium bisulfite in the mixture reacts with sulfur dioxide to obtain ammonium sulfite and returns to the liquid collection tank. The temperature in the desulfurization tower is 90-120°C; the pre...
Embodiment 3
[0108] The flue gas is firstly dedusted by the electrostatic precipitator, and after the dedusted flue gas is pressurized by the induced draft fan, the intake volume of the induced draft fan is 305,000-400,000m 3 / h, first enter the Venturi tube, the waste ammonia water tank is connected with the Venturi tube, spray 1-3% ammonia water into the Venturi tube to absorb the sulfur dioxide in the flue gas to obtain the ammonium bisulfite mixed liquid. And the N / S substance mass ratio is controlled to be 35:70-45:60 through the pH detection device and the sulfur dioxide detection device.
[0109] The flue gas mixture from the Venturi tube enters the liquid collection tank at the bottom of the desulfurization tower, where excessive ammonia water is injected to react with ammonium bisulfite to form ammonium sulfite. A mixture of ammonium bisulfite and ammonium sulfite ammonia is formed in the liquid collection tank. The mixture is pumped to the height of the tower and sprayed downward...
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