Acid gas treatment
AssigneeJiangnan Environmental Protection Group Inc.
InventorsJing Luo, Lifang Qi
Life of this patent
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Abstract
Apparatus and methods for treating acid gas, which utilizes multi-stage absorption cycle of ammonia desulfurization to treat acid tail gas after pre-treatment of the acid gas, thereby achieving the purpose of efficient and low-cost treatment of acid tail gas. The parameters of the acid tail gas may be adjusted by a regulatory system such that the enthalpy value of the acid tail gas is in the range of 60-850 kJ/kg dry gas, for example, 80-680 kJ/kg dry gas or 100-450 kJ/kg dry gas, to meet the requirements of ammonia desulfurization, and achieve the synergy between the acid gas pre-treatment and ammonia desulfurization. Furthermore, hydrogen sulfide may be converted into sulfur/sulfuric acid plus ammonium sulfate at an adjustable ratio.
Claims37
Apparatus for treating acid gas, the apparatus comprising:
- an acid gas pre-treatment system yielding acid tail gas;
- a regulatory system configured to adjust an enthalpy value of acid tail gas to 60-850 kJ/kg dry gas;
- and,
- an ammonia desulfurization system configured to circulate ammonia-containing absorption liquid;
- wherein the pre-treatment system, the regulatory system and the ammonia desulfurization system are in fluid communication, connected successively along a downstream direction of flow of the acid tail gas through the apparatus.
Dependencies are inferred from the claim text.