Mitsubishi-Hitachi Power MHPS Wet FGD at a glance
The Dovient library currently covers 3 published troubleshooting guides for the Mitsubishi-Hitachi Power MHPS Wet FGD, with 18 individual procedure steps distilled from OEM manuals and field experience. On average, a fix on this machine runs 6 steps and roughly 1.5 hrs on tools. Complexity is classified as expert-only, most procedures here involve safety-critical steps, specialised tooling, or OEM-only spares, and should not be attempted without proper training.
Failure modes to watch for
Every guide in the Mitsubishi-Hitachi Power MHPS Wet FGD library lists the candidate root causes its procedure rules out. These are the distinct failure modes we've documented so far, a useful starting point if you don't yet know which specific alarm or symptom you're chasing.
Wash nozzle plugging preventing the mist eliminator from being cleaned between cycles
Wash cycle frequency too low for the gypsum carry-over load
Slurry mist loading higher than design due to over-spray from absorber sprays
Slurry density too high, causing sticky deposits on the chevron blades
Low-reactivity limestone reducing the rate of SO2 absorption by the slurry
Slurry pH below setpoint because limestone feed is insufficient for the current SO2 load
Blocked spray nozzles reducing liquid-to-gas contact area in the absorber
Reduced absorber circulation pump output from wear or plugging
Tools you'll need most
These tools are referenced most often across the Mitsubishi-Hitachi Power MHPS Wet FGD troubleshooting guides. If you service this equipment regularly, keep them on the cart.
Sources we cite for this machine
Every procedure on Dovient is cross-checked against published sources. These are the references cited most often in the Mitsubishi-Hitachi Power MHPS Wet FGD guides.
- cited 3×
Mitsubishi-Hitachi Power MHPS Wet FGD FGD (Flue Gas Desulfurization) general technical documentation
Mitsubishi-Hitachi Power
Every published guide for this machine
How to remove gypsum scaling in the absorber on a Mitsubishi-Hitachi Power MHPS Wet FGD
Gypsum scaling in the absorber comes from slurry density running too high or oxidation air being insufficient. Reduce slurry density to the design band and verify oxidation air flow before attempting mechanical cleaning.
How to restore low SO2 removal efficiency on a Mitsubishi-Hitachi Power MHPS Wet FGD
SO2 removal falling short of the permit target is usually a slurry pH problem from poor limestone quality or a blocked spray level. Check limestone reactivity and slurry pH first.
How to clear mist eliminator plugging on a Mitsubishi-Hitachi Power MHPS Wet FGD
Rising differential pressure across the mist eliminator means gypsum scale is blocking the chevron blades. Verify that wash nozzles are firing on schedule and not plugged. Plan a high-pressure water wash during the next outage.
Frequently asked questions
What are the most common Mitsubishi-Hitachi Power MHPS Wet FGD problems?
The most frequently reported issues on the Mitsubishi-Hitachi Power MHPS Wet FGD include how to remove gypsum scaling in the absorber on a mitsubishi-hitachi power mhps wet fgd, how to restore low so2 removal efficiency on a mitsubishi-hitachi power mhps wet fgd, how to clear mist eliminator plugging on a mitsubishi-hitachi power mhps wet fgd. Each has a step-by-step troubleshooting guide on this page.
How long does a typical Mitsubishi-Hitachi Power MHPS Wet FGD repair take?
Repair time depends on the failure mode. Routine adjustments typically take 30-90 minutes; component replacements run 2-4 hours; major overhauls can take a full shift or more. The procedures linked above list estimated time per problem.
Can these procedures be done by an in-house technician?
Most procedures on this page are designed for a qualified in-house maintenance technician with the listed tools and parts. Procedures requiring OEM-only access (firmware updates, factory calibration) are flagged in the safety warnings.
Are these guides verified against OEM documentation?
Every procedure cites the source manuals, service bulletins, or published references it draws from. The Mitsubishi-Hitachi Power MHPS Wet FGD guides cross-check against 1 source(s) cited above.
Images on this page sourced from Freepik. Credits: thelizton, Sergios.