In KR desulfurization process the mixing time of desulfurizer is an important factor affecting the desulfurization rate Please explain why the mixing time is important to the desulfurization rate

The mixing time is important to the desulfurization rate in KR desulfurization process because it determines the extent of contact between the desulfurizer and the flue gas. The desulfurizer needs to be thoroughly mixed with the flue gas to ensure that sulfur dioxide reacts with the desulfurizer and forms calcium sulfite or calcium sulfate. If the mixing time is too short, the desulfurizer may not come into contact with all of the sulfur dioxide in the flue gas, leading to a lower desulfurization rate. Conversely, if the mixing time is too long, it may result in over-mixing, which can lead to the formation of gypsum scale in the absorber, reducing the desulfurization efficiency. Therefore, the mixing time needs to be optimized to achieve the highest possible desulfurization rate without compromising the stability of the process.