Method for reclaiming ammonium hydrogen carbonate from non-condensable gas of stripping tower
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A technology of ammonium bicarbonate and stripping tower, applied in the direction of ammonium carbonate/acid carbonate, etc., can solve the problems of destroying the living environment of biological bacteria, environmental pollution, and affecting the effect of sewage treatment, and achieve the solution of the greenhouse effect , the effect of reducing environmental pollution
Inactive Publication Date: 2012-06-20
兖州煤业榆林能化有限公司
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Directly venting the removed ammonia will cause environmental pollution, and the sewage treatment system will destroy the living environment of biological bacteria due to excessive ammonia content, affecting the sewage treatment effect
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Embodiment 1
[0018] Composition of non-condensable gas (V%): CO 2 34.43, H 2 14.53, CO 2 21.4, CH 4 0.05,H 2 S0.54, N 2 0.09, Ar0.06, COS0.05, NH 3 15.79, H 2 O13.06, flow rate 1128Nm 3 / h, the theoretical recovery of ammonium bicarbonate is 628.15kg / h, the actual recovery of ammonium bicarbonate is 576.01kg / h, and the recovery rate is 91.7%.
Embodiment 2
[0020] Composition of non-condensable gas (V%): CO 2 36.25, H 2 13.82, CO19.43, CH 4 0.05,H 2 S0.52, N 2 0.08, Ar0.05, COS0.05, NH 3 16.64, H 2 O13.11, flow rate 1176Nm 3 / h, the theoretical recovery of ammonium bicarbonate is 690.14kg / h, the actual recovery of ammonium bicarbonate is 637.69kg / h, and the recovery rate is 92.4%.
Embodiment 3
[0022] Composition of non-condensable gas (V%): CO 2 36.25, H 2 13.82, CO19.43, CH 4 0.05,H 2 S0.52, N 2 0.08, Ar0.05, COS0.05, NH 3 16.64, H 2 O13.11, flow rate 1176Nm 3 / h, while introducing 99% carbon dioxide 100Nm 3 / h, the theoretical recovery of ammonium bicarbonate is 690.14kg / h, the actual recovery of ammonium bicarbonate is 647.35kg / h, and the recovery rate is 93.8%.
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Abstract
The invention provides a method for reclaiming ammonium hydrogen carbonate from non-condensable gas of a stripping tower. The method comprises the following steps of: introducing water, ammonia produced by a gasification process and non-condensable gas containing carbon dioxide into an absorption tower, performing chemical reaction on the ammonia, the water and the carbon dioxide in the absorption tower to generate solid ammonium hydrogen carbonate, discharging the gas which is not reacted with the water and the carbon dioxide in the non-condensable gas from the top of the absorption tower, and separating the rest absorption liquid to obtain the ammonium hydrogen carbonate. According to the method, the ammonia produced in the gasification process is converted into the solid ammonium hydrogen carbonate by using the principle that the ammonia is reacted with the water and the carbon dioxide to generate the solid ammonium hydrogen carbonate, so that the problem that the water is deteriorated by the ammonia and the problem of air pollution caused by the discharge of the ammonia are solved; and the carbon dioxide is also converted into the ammonium hydrogen carbonate, so that the greenhouse effect produced by discharge of the carbon dioxide to the air is eliminated, and environmental pollution is reduced.
Description
technical field [0001] The invention belongs to the field of energy saving and environmental protection, and relates to a method for recovering ammonium bicarbonate from noncondensable gas in a stripping tower. Background technique [0002] my country's energy structure is characterized by rich coal, poor oil, and little gas. This structural feature determines that my country's coal-based energy structure will not change for quite a long time. Coal is the safest and most reliable energy source in our country. At present, the world oil price remains high, and the coal chemical industry already has the economic conditions to compete with the petrochemical industry. Coal will play an even more important role in my country's national economy in the future. [0003] Coal gasification is the leader of coal chemical industry. Because coal contains nitrogen, the oxygen used for coal gasification also contains nitrogen, and various coal-water slurry gasification (including Texaco...
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