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US 11,224,838 B2Granted
Controlling aerosol production during absorption in ammonia-based desulfurization
AssigneeJiangnan Environmental Protection Group Inc.
InventorsJing Luo, Yongying Luo, Jinyong Wang
Life of this patent
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Abstract
Controlling aerosol production during absorption in ammonia-based desulfurization. The absorption reaction temperature, the oxygen content and water content of the process gas may be controlled, and an absorption circulating liquid containing ammonium sulfite may be used for removing sulfur dioxide in flue gas, so as to control aerosol production during absorption in the ammonia-based desulfurization.
Claims44
Apparatus for absorption of sulfur dioxide from a flue gas, the apparatus comprising:
- a reactor configured to receive the flue gas;
- a spraying layer that is disposed in the reactor and is configured to contact the flue gas with an ammonia-bearing liquid that contains ammonium sulfite and absorbs, at a temperature, sulfur from the flue gas;
- a control that is configured to:
- limit oxygen content of material entering the reactor to a content that is no greater than 12% by volume;
- and
- lower the temperature in response to an excess aerosol content in effluent from the reactor;
- an oxidation system configured to oxidize the liquid;
- and
- an auxiliary system that is configured to derive ammonium sulfate solid from the liquid.
6 more elements
A method for absorption of sulfur dioxide from a flue gas, the method comprising:
- flowing the flue gas through a reactor;
- in the reactor, absorbing at a temperature, in an ammonia-bearing, circulating liquid that contains ammonium sulfite, sulfur from the flue gas;
- collecting the liquid;
- limiting oxygen content of material entering the reactor to a content that is no greater than 12% by volume;
- and
- responsive to an excess aerosol content in effluent from the reactor, lowering the temperature.
3 more elements
Dependencies are inferred from the claim text.