The function of the automatic acid addition device for circulating water systems
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Recently, our chemical plant’s first circulating water system is set to be equipped with an automatic acid addition system. Besides reducing the labor intensity associated with manual acid addition, what other functions and benefits does it have? If the automatic acid addition device is implemented as a technical upgrade, we should set those parameters for the circulating water as the criteria for evaluating the success of the project. If it is to be used as a QC project, which data needs to be collected? I would appreciate some advice and ideas from experts and forum members. This post was last edited by keely on 2009-4-2 10:44]
Why is acid added to the circulating water?
Connect the metering pump to an online monitoring system; the dosage of chemicals should be automatically controlled based on the set pH value. It is essential to measure the pH of the return water pipeline – consult the manufacturer for more information
This is an automatic dosing system; however, the materials used must be resistant to strong acids – the metering pumps, dosing tanks, pipes, and valves all need to be made of acid-resistant materials. Of course, the acid addition system is used to adjust the pH value of the circulating water, that is, to control the alkalinity, in order to achieve a higher concentration ratio and save water. This requires it to be connected to a pH meter in order to automatically regulate the amount of acid added. There are many manufacturers that produce such equipment; you can find plenty of them by searching on the Internet.
Generally, the pipeline pressure is not high, and a set of such devices is not expensive. I work on dosing devices.
Automatic acid addition is easier to control than manual acid addition; with manual addition, it’s difficult to maintain the proper pH level, the reaction proceeds more slowly, and this can lead to corrosion of the system
A pH probe and a sensor are used to control a dosing pump, thereby achieving more stable pH control of the circulating water. It is important to consider carefully the sampling point and the dosing point; the dosing point should be located where the water flow is fast and mixing is good, while sampling can be done at the outlet of the circulation pump