Could everyone introduce a portion of the exhaust gas into the inlet of the dryer tower?
Thread Content
I have thought about this problem for a long time, and I believe it’s possible. Please discuss it and give me a viable solution; don’t approach this problem with conventional thinking. Thank you all here
The oxygen content in the exhaust gases is already very low; in other words, exhaust gases such as nitrogen have been added to the system, and this doesn’t work
\"Sulfuric Acid Industry\" has reported on this matter before, stating that Indians have done such things. Imagine the exhaust returning and then being diluted with air. Doing this reduces the oxygen-to-sulfur conversion ratio, and the amount of catalyst required increases. From another perspective, sulfuric acid exhaust gas is a completely dry gas, and it can also be considered a resource.
To make use of this dry gas resource, by introducing the exhaust gas directly at the outlet of the dryer during heating, the amount of starter acid required can be significantly reduced. If the acid temperature in the second absorption tower is kept at a higher level, some of the costs associated with heating can also be saved. This post was last edited by boqing_zh on 2009-4-12 19:18]
The utility value is low; to solve the problem, it is necessary to control the conversion rate and absorption rate properly.
Thank you to everyone for your analyses and insights
The scheme of routing the exhaust gas back to the inlet of the drying tower allows for significant savings in mother acid during startup and shutdown, and it proves to be quite effective.
It doesn’t hold much value; it merely helps to save some mother acid while driving the vehicle. It’s completely unnecessary in phosphate fertilizer plants. Connecting a pipe from the outlet of the secondary tower to the outlet of the drying tower requires significant investment as well. Besides, there are several times a year when the temperature rises while driving.