Can you supply the fans across the whole flue-gas train, or only one duty?
Across the whole train. We engineer the incinerator ID, the induced-draught fan, the FGD and scrubber boosters, the SCR/DeNOx booster, the ESP or baghouse main fan and the corrosive-gas exhaust. Each fan is engineered to its own gas chemistry, temperature and dust load — the hot incinerator ID and the saturated FGD booster are different machines — but they come from one partner, on one engineering convention across the plant. The underlying fan engineering is proven across our range on cement, power and pollution-control duty; we engineer it to your waste-to-energy duty.
Our flue gas is chloride-laden and drops below the acid dew point. What metallurgy do you use?
We size the metallurgy and the dew-point margin to your gas analysis. Below the acid dew point (typically 120 to 150 °C, common across the FGD, exhaust and cooler circuits) we keep the casing wall above dew point with insulation and heat tracing, and select 316L on the wetted surfaces, stepping to higher alloys where the chloride content demands. The right answer depends on your HCl, SO₂/SO₃, moisture and chloride level, so we engineer it to your gas, not a default. Send us the gas analysis and we specify the material and the margin against it.
Incinerator ash is sticky and abrasive. How do you protect the wheel and casing?
Mixed-waste fly ash is chloride-coated, so it both scours the wheel and cakes onto it, and its makeup shifts with the waste feed. We protect three ways sized to your loading. A rugged radial wheel that sheds coated dust and resists erosion; chrome-carbide hard-facing on the blade leading edges and high-wear zones; and bolted-in, replaceable wear plates and liners at the scroll throat and inlet with inspection and cleanout doors, so caked and worn parts change out in place. The wear scope is replaceable, not welded in — which is what keeps the fan running between overhauls.
What is the maximum gas temperature you handle on an incinerator ID or hot-side fan?
Continuous duty up to 500 °C across the envelope. Furnace-exit gas is hotter, but after the boiler the ID typically sees 150 to 300 °C, and hot-side duty runs up to 500 °C. Above about 350 °C we fit a shaft cooling disc to keep heat off the bearings, keep the bearings outside the airstream, and add expansion joints for the thermal growth (a 1 m shaft grows about 5.8 mm from cold to 500 °C). Refractory lining is specified for 600 °C service for the hottest duty. The fan is built for your stated gas temperature and excursion case, not a generic rating.
Can you build a replacement to match our existing incinerator fan's duty and footprint?
Yes. We reverse-engineer to the existing duty point (flow, static pressure, gas temperature, density, chloride and dust load), bearing centres, inlet/outlet orientation and foundation bolt pattern so the unit drops onto the existing base and ducting — whether it is an incinerator ID, an FGD or SCR booster, an ESP main fan or a corrosive-gas exhaust. Made to your installation and your gas analysis, not a nearest-catalogue substitute. Send the old GA, the nameplate, the gas analysis and a curve if you have one, and we match it.
Do you performance-test the fans, and what about AMCA, CE, ATEX and quality certification?
Every fan is performance-tested in-house to the IS 4894 / ISO 5801 / AMCA 210 method on our 200 HP VFD test rig, and dynamically balanced to ISO 21940 G6.3 as standard (G2.5 / G1.0 on application). Because the rig runs cold air, hot corrosive flue-gas operation is extrapolated by fan-law correction for density. To be precise: that in-house testing is to the IS 4894 / ISO 5801 / AMCA 210 method, not AMCA-certified; CE is self-declared per 2006/42/EC and 2014/35/EU, and ATEX Zone 2/22 is self-declared per 2014/34/EU (Category 3) where the area classification calls for it — those are self-declarations of conformity, not third-party certifications. Our only third-party certification is ISO 9001:2015.
