Advantages and disadvantages of using thermal AI for online cleaning of mother boards
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This post was last edited by chen-jun-1024 on 2011-4-12 09:11. Different manufacturers use various methods for cleaning their mother boards, but from the perspective of reducing wastewater discharge and cutting production costs, a scientific and reasonable cleaning method is what everyone should strive for. We have a 400,000-ton caustic soda production plant, which has been modified through piping adjustments to operate in a series configuration with two mother liquors per set. During normal production, the previous group is cleaned only with AI fluid, while the subsequent group continues to operate normally to recover the cooling capacity of Mother II fluid. Switch according to a certain cycle as appropriate, and repeat this process. The main purpose of doing this is to avoid the generation of cleaning wastewater, thereby contributing to zero wastewater discharge in the caustic soda production system; it also facilitates operational procedures and management. Here, I would like to ask everyone: what are the advantages and disadvantages of using hot AI for online cleaning of motherboards? Which other manufacturers use this cleaning method, and what are the actual results?
This post was last edited by chen-jun-1024 on 2011-5-19 16:49. What are the advantages and disadvantages of using hot AI for online cleaning of motherboards? Which other manufacturers use this cleaning method, and what are the actual results? The advantage is good environmental protection. The downside is that it takes a long time and consumes a lot of energy. And a backup heat exchanger is required. Ours is high-pressure water. It works very well. Fast speed.
Reply to 2# steinback: By online cleaning, I mean that cleaning is not carried out separately; our raw coal is processed in one batch while cleaning takes place in another batch, using water for cleaning. The results are good, but this approach is incompatible with the principles of liquid contraction in the caustic soda system, as well as with efforts to save energy and reduce emissions. Later, we carried out technical upgrades: two sets of heat exchangers were connected together, one set at the front and the other at the back. The material pumped in by the AI pump was cooled through a plate heat exchanger before entering the first set of mother exchangers. This set of mother exchangers did not handle Mother II liquid; instead, it was cleaned using AI liquid. The temperature of the AI liquid remained almost constant as it entered the second set of mother exchangers where it exchanged heat with Mother II liquid. After a certain period of time, the switch is made, and the two sets of mother switches exchange positions. . . Therefore, there is basically no issue of a significant increase in power consumption; it’s just that when the two sets of pumps are connected in series, the power consumption of the AI pump increases slightly. Here, I wonder which manufacturers follow the same approach as us? Let’s talk about the pros and cons. . .
Under normal conditions, no crystals form in the AI side cold AI; I’m not sure what the purpose of cleaning is Sometimes, it is necessary to use a high-pressure water gun to clean the scale off the MII side.
Our company has not yet started production, and the cleaning plan for the mother converter has not been finalized yet. During a previous class, our supervisor mentioned that the heat exchanger contains a lot of calcium and magnesium ions, which need to be cleaned with hydrochloric acid; if that isn’t sufficient, hot water can be used for cleaning. For the shell side, it’s enough to stop the water flow for cooling and use M2 to directly clean it with hot A1. The method used by the company where the poster works is quite good – cleaning online without affecting production; I think it’s a reasonable improvement