FGD Gypsum Dewatering Decanter Centrifuge LW580 High Solids Flue Gas Desulfurization Sludge Treatment

Flue gas desulfurization systems in coal fired power plants and industrial boilers generate large volumes of FGD gypsum slurry that must be dewatered continuously and economically. HUADING LW580 FGD gypsum dewatering decanter centrifuge separator converts this calcium sulfite and calcium sulfate slurry into a stackable cake with low residual moisture, allowing power stations to reclaim commercial grade gypsum for wallboard, cement retarder and soil amendment applications. The machine operates around the clock with minimal operator attention, replacing costly vacuum belt filters and plate filter presses that demand frequent cloth cleaning and high maintenance input.

The horizontal solid bowl design accelerates the feed slurry smoothly through a stationary inlet tube, and the centrifugal force generated at 2500 rpm settles gypsum crystals against the bowl wall while clarified water overflows through adjustable weir plates. A screw conveyor rotating at a controlled differential speed transports the settled solids toward the conical discharge end, where the dewatered cake exits continuously. This dynamic sedimentation process delivers stable cake dryness regardless of upstream fluctuations in slurry concentration, making the LW580 a dependable workhorse for desulfurization plants that treat between 15 and 35 cubic meters of slurry per hour.

• High solids capture: The 4.3 length to diameter bowl geometry provides a long settling zone that retains fine gypsum particles, keeping the clarified water well below discharge permit limits for suspended solids.
• Continuous automatic operation: PLC controlled back drive adjusts the differential speed in real time, so the centrifuge self optimizes for changing feed conditions without manual intervention.
• Corrosion resistant wetted parts: Stainless steel contact surfaces and tungsten carbide wear protection on the conveyor flights and solids outlet guarantee long service life in abrasive gypsum duty.
• Compact footprint: The skid mounted unit replaces multi stage filtration equipment, cutting floor space requirements and installation cost in retrofit power plant projects.
• Energy efficient drive train: The 55 to 75 kW main motor and frequency controlled back drive deliver high g force only when needed, lowering specific energy consumption per ton of dry gypsum.
• Low maintenance design: Sealed bearings, centralized lubrication points and easy access hood panels reduce routine service time to a few hours per month.
• Complete automation package: Touch screen human machine interface records throughput, torque, vibration and bearing temperature, and connects to plant DCS systems for remote monitoring.

The LW580 serves desulfurization gypsum dewatering in coal fired power plants, steel mills, waste incineration facilities and chemical plants that operate wet limestone gypsum flue gas scrubbing systems. Beyond FGD service, the same machine dewaters phosphogypsum, citrogypsum and other synthetic gypsum streams from acid neutralization processes. The recovered gypsum cake is suitable for wallboard manufacturing, cement setting regulation and agricultural gypsum amendment, while the clarified water returns directly to the scrubber loop, substantially reducing fresh water consumption and closing the process water balance of the entire desulfurization island.

Each LW580 is assembled in HUADING workshops and undergoes a full factory acceptance test including vibration measurement, noise check, run balance verification and a water load trial before shipment. The machine is protected with anti corrosion film and exported in a reinforced steel frame with plywood lining, suitable for sea freight or container shipment. A complete set of documentation including layout drawing, foundation plan, electrical diagram, operation manual and test certificate is delivered with the equipment. HUADING offers a twelve month warranty, on site commissioning support and remote video guidance by experienced engineers, with a global spare parts network for screw conveyors, bearings and seals.