Control of acid amount under concentrated sulfuric acid
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This post was last edited by sunjl1981 on 2013-1-6 23:31. Hello everyone, I’m new to this forum. I have a question I’d like to ask you all: How is the amount of acid supplied under concentrated sulfuric acid controlled? That is, the flow of acid from the sump to the bubble column. Can ordinary ball valves be used for this purpose? # ， ， &
Control is primarily based on the concentration of the waste acid; generally, this concentration is kept around 75%. Ball valves can be used for this purpose, but globe valves are preferable as they make it easier to regulate the flow rate.
The amount of acid added is controlled by the concentration of the waste sulfuric acid; using a stop valve makes it easier to regulate this amount. It’s better to use a sump; never use a metering pump, as they are prone to failure. **It has increased the maintenance costs.
The acid below the sump doesn’t work well. Valves are difficult to control; metering pumps are more reliable. When comparing the two, metering pumps are the better choice