Decomposition mediation in chlorine dioxide generation systems through sound detection and control

A method of controlling a chemical reaction comprising:

• (i) feeding a first solution and second solution into a reactor, the first solution having a first first-solution flow rate and the second solution having a first second-solution flow rate;
• (ii) detecting a chlorine dioxide decomposition event sound in the reactor using a sound sensor that is adjacent to the reactor, wherein the sound sensor converts the chlorine dioxide decomposition event sound into an event sound signal;
• (iii) converting the event sound signal to an event frequency spectrum;
• and/or
• calculating an event envelope signal of the event sound signal;
• (iv) identifying a chlorine dioxide decomposition event by comparing one or more of the event frequency spectrum or the event envelope signal to a stored sound signal;
• and
• (v) adjusting the first first-solution flow rate to a second first-solution flow rate and/or the first second-solution flow rate to a second second-solution flow rate to mitigate the chlorine dioxide decomposition event, wherein:
• the first solution comprises an acid;
• the second solution comprises chlorate, chlorite, hydrogen peroxide, or a combination thereof;
• and
• the stored signal comprises a stored frequency spectrum having one or more frequencies and peak powers characteristic of a chlorine dioxide decomposition event and/or a stored envelope signal characteristic of a chlorine dioxide decomposition event.