How is the acid and alkali concentration at the outlet of the acid-alkali sprayer controlled?
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In practice, when regenerating a strong acid cation exchanger with H2SO4, it needs to be done in stages. The concentration in the first step is 1%, and the concentration in the second step is 1%. The method we use is low flow rate in the first step and high flow rate in the second step. Is it necessary to precisely control the concentration of the regeneration solution, and if so, how? This post was last edited by li*ch1968 on 2009-4-9 20:18]
There is a dedicated acidity meter with a range of 1–5%, and it’s in use; it’s quite good. It can also be adjusted using a rotameter; tuning is required. Regenerate it with sulfuric acid, bro, haha
When regenerating sulfuric acid, it is essential to control the regeneration concentration carefully; this should be done in stages, and installing a pH meter at the outlet can yield good results
The acid-water mixing pipeline downstream of the ejector should be equipped with a sampling valve, and the water pipeline upstream of the ejector should also have a control valve to regulate the water flow. Start by taking multiple samples to determine the appropriate amount of water, and once that is found, you won’t have to worry about it again.
In devices with low levels of automation, it relies entirely on experience: adjust the amount of acid or base at the injector’s outlet, take samples at the sampling point to test the specific gravity, and once the settings are appropriate, remember the valve opening degree; it’s best to make some note of this so there’s no need to worry about it next time................It’s a crude method, I know
There are dedicated pH meters at the ejector outlets; samples can also be taken from the sampling ports for manual testing； Additionally, the piping design in this section also has a significant impact on concentration control; generally, it is better to use smaller pipes for the inlet ports where acids and bases are introduced, otherwise it becomes difficult to adjust the concentration.
http://hy.ailichuang.com/upfile/201804/2018041769049785.jpg http://hy.ailichuang.com/upfile/201805/2018050351430921.jpg Please take a look