Is the acid flowing after the pump the same as the one flowing before the acid cooler? It’s better to slip away when it’s cold
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Is the acid flowing after the pump the same as the one flowing before the acid cooler? Is it better to walk away after it gets cold? May I ask the expert? .
This shouldn’t be a big problem; generally speaking, it’s more common for acid to be added before the acid cooler than after it. Furthermore, in terms of the method of acid injection, the most common approach is to inject acid from the acid outlet pipe of the tower.
“For adding acid through the acid pipe at the tower outlet, the most common method is “---------” – does this refer to the point of addition? Also, the load on the acid cooler has increased compared to before. This amount needs to be included in the calculation. This post was last edited by zzyhncs on 2009-3-10 15:40]
Our company uses acid injection before anodic protection; the acid injection pipe is connected to the main acid return pipe of the tower. We have also added a pipe at the pump outlet of the drying tower that feeds acid inwards, in order to prevent a situation where excessive negative pressure prevents acid from being delivered – in such cases, acid is injected from the pump outlet.:)
The amount of acid mixing is high, and it involves mixing between 104.5 acid and 98 acid; it is recommended to carry out the mixing after heat exchange, as the dilution heat resulting from this mixing increases the partial pressure of sulfur trioxide on the acid surface, which is not beneficial for the system. The amount of water used in the circulation is actually not very different. String acid with little variation in acidity is generally back-acid stringing from below.
See the sulfuric acid circulation process in the dry absorption section: http://bbs.hcbbs.com/viewthread.php?tid=354644&page=1#pid1980793