Although CR scrubbing systems need very little maintenance to keep them in optimal running condition, they are not maintenance free. Just like a vehicle needs its oil changed and tires rotated periodically, scrubbers need parts replaced from time to time.
All scrubbers, be them a jet venturi, high energy venturi or packed tower, will need their spray nozzles replaced periodically. How frequently replacement is needed depends on the nature of the fluid. Some systems last decades between replacements, others need to be changed out more regularly.
The best way to tell if a nozzle needs replacement is to compare the observed flow rate to what the system was designed for. Too little flow indicates possible plugging of a fouling, and system capacity will drop as a result. Too high of a flow indicates excessive wear, and leads to an unnecessary increase in pumping power and utility use.
Given that our nozzles are made to order, it is better to have a set on hand, rather than wait until right before a scheduled shutdown. A spare set of gaskets is also advisable, in order to ensure that the equipment seals correctly when it is reassembled.
For high energy systems and packed towers, as well as jet / separator tank systems, the mist eliminator element will also need periodic replacement. Although for situations where excessive fouling can be anticipated in advance, wash down nozzles can be integrated into the design, the mist eliminators, particularly the mesh pad designs, do need periodic replacement to ensure optimal liquid removal. Often the first sign of an excessively fouled mist eliminator is an increase in pressure drop through the scrubber.
Finally, for the packed towers the packing will need to be periodically replaced. As with mist eliminators, excessive fouling is usually the best indicator that replacement is advisable. Given that each tower is designed with a specific packing size and type to suit the application, its best to contact CR Clean Air for replacement packing as this will ensure that the performance characteristics, including pollutant removal rate and pressure drop, are consistent with the original system design.