Wet ammonia desulfurization concentration process of cold and hot state discharge
A kind of ammonia desulfurization and process technology, which is applied in the field of wet ammonia desulfurization concentration process, can solve the problems of increasing energy consumption, ammonia escape, increasing the load in the tower, etc., and achieves the reduction of ammonia escape rate, high desulfurization efficiency, and high desulfurization rate Effect
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[0026] It can be seen from the previous process and control and the definition of the hot and cold state that the pH value, density and solid content of the concentrated liquid need to be controlled, but it is impossible to add ammonia to the concentrated liquid to adjust the pH value. Therefore, the present invention The pH value of the concentrated solution is indirectly controlled by adding liquid ammonia to the oxidation tank to adjust the pH value of the oxidizing solution. The density adjustment is mainly performed by the coordinated control of the concentrated solution circulation pump, the concentrated solution discharge pump and the oxidizing solution discharge pump. The control of solid content is controlled by the selection of the discharging method.
[0027] (1) Control of pH value of concentrate
[0028] The main components of the concentrated solution are ammonium sulfate, part of ammonium bisulfate and a small amount of ammonia. Because the original flue gas of the c...
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