Temperature control of the desulfurization fluid in HPF ammonia-based desulfurization process
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To what extent does the temperature of the desulfurization solution in the HPF ammonia-based desulfurization process affect the desulfurization efficiency? It is designed to be maintained at 35–40°C; above this temperature, the growth of by-products accelerates and the amount of volatile ammonia decreases. But is it necessarily better if the temperature of the desulfurization solution is too low?
It is best to keep it between 35 and 40°C to ensure desulfurization efficiency.
In terms of temperature alone, too high a temperature accelerates the formation of by-products, while too low a temperature results in poor desulfurization efficiency. QQ: 1123267744
It is recommended to keep the gas temperature between 28-30°C, and the desulfurization liquid temperature between 30-35°C. Since the process of absorbing H2S by volatile NH3 is an exothermic reaction, lower temperatures are more favorable for absorption. For example, if the temperature of the gas is high, the resistance in the desulfurization tower increases, leading to greater energy losses and making it harder to absorb H2S. If the temperature of the desulfurization solution is too high, it increases the ammonia partial pressure at the surface of the solution, thereby reducing the ammonia content in it and hindering H2S absorption. At the same time, more by-products are formed, and the desulfurization efficiency declines. The reactions that take place in the regeneration tower are endothermic; therefore, too low a temperature for the desulfurization solution also hinders the progress of these regeneration reactions. Therefore, the temperature of the desulfurization liquid is controlled at 30-35 degrees Celsius.
It seems like the teacher is very knowledgeable in this field. Is there a discussion group where we beginners can learn from them?
25–35 are both acceptable; this depends on the system’s characteristics: 13569738634
A high temperature of the circulating fluid has a significant impact on NH3. Does your desulfurization tower have a cooler? If possible, it’s best to keep it between 28 and 32
At too low temperatures, the reaction rate between hydrogen sulfide and ammonia slows down; as a result, the hydrogen sulfide in the gas escapes before it can be absorbed, reducing the absorption rate of hydrogen sulfide.