About current efficiency
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This post was last edited by sunjl1981 on 2013-1-6 19:53. I am not a chemistry major and I have never paid attention to relevant information or specific formulas before. I always thought that current efficiency is a parameter that reflects the power consumption per ton of alkali. After reading it today, I realized that it reflects the effective utilization efficiency of charges in the current, which is the percentage of charges participating in the main reaction to the total charge of the current. Cathode current efficiency = actual alkali production/theoretical alkali production = alkali flow rate To produce the same amount of alkali under the same current, the one with high current efficiency does not necessarily consume less power, because the power consumption is determined by the cell voltage and current efficiency. Because we learned W=UI in middle school physics. After reading the information, I found out the formula for how many kilowatt-hours of electricity is consumed per ton of alkali.: W=tank voltage×1000/(1.492×current efficiency) hcbbs hcbbs
“It's never too late to know the "way". Hey, did you accidentally reverse the numerator and denominator in your current efficiency formula?
Sure enough, I accidentally put the actual output and theoretical output formulas in reverse.
Moreover, the theoretical alkali production = 1.492 × current × number of unit slots × time should also be related to current efficiency! So it has to be multiplied by the current efficiency.
The small formula for theoretical output does not multiply by current efficiency. Current efficiency is equal to actual output divided by theoretical output.
There are many influencing factors for power consumption, such as the quality of salt water, the decomposition voltage and overvoltage of the electrolytic cell, current density, cell temperature, alkali concentration and many other factors. Reducing power consumption is a very complicated matter, and there are many places to start. The quality of primary salt water can be adjusted from several aspects such as sodium chloride content, calcium and magnesium content, iron content, alkali content, temperature, etc. to ensure an appropriate range and reduce power consumption.
Many operating factors and equipment structural factors can directly or indirectly affect the current efficiency and tank voltage, thereby affecting power consumption. It can be understood this way.