What is the impact of the temperature difference between the top of the quench tower and the top of the absorption tower on the plant, and what are the corresponding adjustment methods?
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This post was last edited by Shandong Huaxing on 2010-8-14 22:50. What is the impact of the temperature difference between the top of the quench tower and the top of the absorption tower on the plant, and what are the corresponding adjustment methods? :) Thank you all!
A high temperature at the top of the quench tower will correspondingly lead to a higher temperature in the absorption tower, which reduces the efficiency of ammonia solution in carrying out absorption. As a result, the hydrogen sulfide content in the purified gas increases, the system pressure rises, the sulfur recovery rate in the Scott unit decreases, and the temperature of the flue gas furnace increases. If the temperature of the quench tower is too high, the gas entering the absorption tower will carry a large amount of liquid with it, causing the liquid level in the absorption tower to rise and the concentration of the ammonia solution to decrease, thereby affecting the absorption process. The solutions to this issue are to increase the amount of water used for cooling or to lower the temperature of that cooling water； When the temperature of the amine solution is too high, it causes the temperature of the absorption tower to rise, which in turn affects the absorption efficiency; as a result, the hydrogen sulfide content in the purified gas increases, and the temperature of the exhaust furnace rises as well. Adjustment method: Lower the temperature of the amine solution and increase the circulation rate.
Excessively high temperatures in the absorption tower increase the amount of amine solution lost. . . . . . .