Could there be operational shortcomings in the future operation of the dry absorption process diagram? Looking forward to an answer
Thread Content
First of all, regardless of whether my upcoming views are correct or not, as a newcomer, I hope everyone can encourage me. Recently I came across a dry absorption PID diagram for a plant that produces only 105% acid; theoretically, sufficient amount of 98% acid should be available in the drying and absorption cycle tank (it is necessary to adjust the concentration of 105% acid), and this could ultimately lead to an increase in the liquid level in the drying and absorption tank! The problem is that there is no liquid level control point in the drying and suction circulation tank? ? ? I wonder later whether it’s possible to adjust this by controlling the flow rate of flue gas entering the nicotinic acid tower. But thinking in this way, there are even more parameter changes. Not conducive to operation. I’m just a newcomer; please don’t criticize if you don’t like it. The description is a bit long – I hope for an answer. Thank you!
This post was last edited by Shang Xiaoke on 2016-4-6 at 12:26. Level control is achieved by adjusting the amount of acid added. When designing the maximum daily output, isn’t reducing the output by 105 simply achieved by controlling the amount of flue gas introduced? The remaining excess flue gas can be used to produce 98% acid. In this case, 105 won’t reach the maximum output, right?
The production capacity is designed to be relatively high, ensuring an adequate supply of niacin. I think constantly adjusting the amount of smoke would result in significant variations in other parameters
The PID for the dry absorption section, where 104.5% acid is produced overall, should be as follows: 1. The dry absorption circulation tank is connected to a pipeline leading to the nicotinic acid circulation tank; 2. The nicotinic acid circulation tank is connected to a pipeline leading to the dry absorption circulation tank
Well, there is indeed a DN50 pipe that connects the nicotinic acid circulation tank to the drying and absorption circulation tank (this is likely intended to allow the waste acid to be discharged from the drying and absorption circulation tank into the 98-degree tank and then to the waste acid tank after the startup acid cleaning process). However, this DN50 pipe is equipped with a stop valve; I think it would be better to use a self-regulating valve, as this would enable the use of this pipe for the waste acid after startup acid cleaning, and it would also allow the liquid level in the drying and absorption circulation tank to be adjusted using this pneumatic valve during normal system operation! The problem has finally been solved.