A wet scrubber preventive maintenance schedule lists the checks and jobs done on the equipment at fixed intervals, how long each takes, and in what order of frequency, so problems are found before the wet scrubber fails. This page gives the schedule used in the PlantOps360 task library for wet scrubber (, flue gas desulphurisation and fume scrubber), which follows common industry practice for general-purpose equipment. It is also searched for as scrubber, FGD, packed tower, acid fume scrubber.
The maker’s manual and your site safety procedures always come first where they differ. Intervals set by law differ by state.
Wet scrubber preventive maintenance schedule and checklist
| How often | Task | Estimated time |
|---|---|---|
| Daily | Check scrubbing liquor flow, pH and differential pressure; check sump level | 10 min |
| Weekly | Check circulation pumps, spray nozzles and the mist eliminator | 20 min |
| Monthly | Dose and check the neutralising chemical; clean the pH probe; check demister wash | 45 min |
| Quarterly | Check packing and spray nozzles for scaling and blockage | 90 min |
| Half-yearly | Check fan and duct for corrosion; check sludge handling | 150 min |
| Annual | Annual inspection and cleaning of tower, packing and lining | 420 min |
Wet scrubber maintenance frequency and yearly workload
At the estimated times, one wet scrubber needs about 105 hours of preventive maintenance a year. The biggest single job is “Annual inspection and cleaning of tower, packing and lining” at 420 minutes, done annual. Multiply by the number of units you have to see the workload for your plant.
| Frequency | Tasks | Time per round | Hours per year |
|---|---|---|---|
| Daily | 1 | 10 min | 60.8 h |
| Weekly | 1 | 20 min | 17.3 h |
| Monthly | 1 | 45 min | 9.0 h |
| Quarterly | 1 | 90 min | 6.0 h |
| Half-yearly | 1 | 150 min | 5.0 h |
| Annual | 1 | 420 min | 7.0 h |
What goes wrong on a wet scrubber without preventive maintenance
- Spray nozzle blockage and scaling
- Circulation pump wear
- Mist eliminator fouling
- pH control and dosing faults
What to watch between services
- Liquor flow and pH
- Differential pressure
- Pump and nozzle condition
Safety and statutory notes for wet scrubber maintenance
Scrubbing liquors are corrosive. Use PPE and keep the effluent from the scrubber within your consent.
Where a wet scrubber preventive maintenance schedule is used
This equipment is used in the industries below. Each link opens the preventive maintenance schedule guide for that industry, and the maintenance software page where we have one.
- Preventive maintenance schedule for electronics manufacturing plants · maintenance software for electronics
- Preventive maintenance schedule for pharmaceutical plants · maintenance software for pharmaceutical · maintenance software for api bulk drugs
- Preventive maintenance schedule for chemical, fertiliser and petrochemical plants · maintenance software for chemical
- Preventive maintenance schedule for steel, foundry, forging and metal plants · maintenance software for steel and metals
- Preventive maintenance schedule for cement, glass, ceramics and building materials plants · maintenance software for cement
- Preventive maintenance schedule for oil, gas and refinery facilities · maintenance software for oil and gas
- Preventive maintenance schedule for thermal and hydro power plants · maintenance software for power plants
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Browse the full list of equipment preventive maintenance schedules (317 types).
Run this wet scrubber schedule in maintenance software
In preventive maintenance software, each row above becomes a recurring task on the asset with its checklist, time estimate and parts. Tasks can be triggered by calendar date, running hours, meter readings or production cycles, each completed task is recorded with the person and date, and a failed check can open a work order. For the method behind it, read the guide to the preventive maintenance schedule, or use the free generator to get a 12-month plan for your whole equipment list.
Build my preventive maintenance schedule (free Excel)
Frequently asked questions
How often should a wet scrubber be serviced?
In our schedule a wet scrubber has 6 tasks: 1 daily, 1 weekly, 1 monthly, 1 quarterly, 1 half-yearly, 1 annual. The biggest job is “Annual inspection and cleaning of tower, packing and lining”, which is done annual. Always follow the maker’s manual where it gives a different interval.
What is included in wet scrubber preventive maintenance?
It covers routine checks and jobs such as “Check scrubbing liquor flow, pH and differential pressure; check sump level”, “Check circulation pumps, spray nozzles and the mist eliminator”, “Dose and check the neutralising chemical; clean the pH probe; check demister wash”, up to the annual overhaul or inspection. The full list with times is in the table above.
How many hours of maintenance does a wet scrubber need per year?
About 105 hours per unit per year at the estimated times in our library, including the daily checks done every day. Use it to plan workload, not as a benchmark.
Is there a free wet scrubber maintenance checklist?
Yes. The table on this page is a ready checklist. The free preventive maintenance schedule generator turns it into a 12-month Excel schedule for your list of equipment, with monthly workload hours.