DT Desulphurization FGD Pumps: field notes, specs, and a few hard truths

If you’re hunting for a flue gas desulfurization pump that won’t flinch at abrasive limestone slurry and sneaky chlorides, the DT/TL series coming out of Shifo Town, Anguo City, Hebei Province has been getting more shop-floor nods than I expected. I spent a day around the casting line and test bay—nothing flashy, but the details matter: tight machining, sane metallurgy choices, and technicians who actually pick up calipers (always a good sign).

What’s moving the market

Tighter SO₂ caps, more waste-to-energy retrofits, and the very practical push for lower lifecycle cost are reshaping FGD recirculation choices. In fact, buyers are leaning toward duplex stainless and high-chrome iron hybrids, with ISO 9906 acceptance testing baked into contracts. Digital condition monitoring is creeping in too—vibration baselines and wear-trend logs, not just clipboard checks. Honestly, the shift is overdue.

DT/TL series at a glance (real-world, not brochure-speak)

In lab abrasion trials (quartz slurry, 400 h), impellers showed wear rates in the expected band for high-chrome iron; duplex parts held up better in high-chloride liquor—no surprises there.

Where these pumps actually work

• Coal power & captive power FGD recirculation (limestone–gypsum method)
• Waste-to-energy absorbers with chloride-rich liquor
• Steel sinter plants and nonferrous smelters

Typical process flow: limestone prep → absorber recirc via flue gas desulfurization pump → mist eliminator wash → gypsum dewatering. Materials are chosen off chloride load and solids hardness; duplex for corrosion hotspots, high-chrome for abrasion, with rubber lining where budget or chemistry suggests. Service life claims vary, but field feedback points to 12–24 months for impellers (normal duty), longer with duplex and correct seal plan. Your mileage will vary with solids size and duty cycle.

Customization options

Nozzle orientation tweaks, baseplate geometry, interchangeable liners, cartridge seals with API-style flush plans, silicon-carbide faces, and VFD-ready motors. Factory can provide EN 10204 3.1 certs, PMI reports, and NDT (PT/UT) on pressure parts on request—worth asking, to be honest.

Vendor snapshot (brief, practical)

Case notes and feedback

• 2×500 MW coal unit retrofit: three flue gas desulfurization pump sets per absorber, 18 months runtime; seal leakage reduced ≈ 35% after switching to cartridge seals with clean water flush.
• WtE plant, high chlorides: duplex wetted parts extended overhaul intervals from yearly to ≈ 22 months, according to maintenance logs.
• Steel sinter FGD: operators reported easier liner swaps; alignment held after two thermal cycles—small thing, big smiles.

Quality and compliance

Hydraulic tests per ISO 9906, pressure parts with EN 10204 3.1, and material specs traceable to ASTM/EN equivalents. Many customers say the documentation bundle is cleaner than they expected. Certifications commonly shown: ISO 9001 and ISO 14001; CE marking available where applicable.

Bottom line: if you need a dependable flue gas desulfurization pump with pragmatic material choices and sensible lead times, DT/TL is worth shortlisting—especially when lifecycle cost and spares availability trump brand decals.

Authoritative citations

1. ISO 9906:2012 Rotodynamic pumps—Hydraulic performance acceptance tests. https://www.iso.org/standard/52045.html
2. ASTM A532/A532M – Standard Specification for Abrasion-Resistant Cast Irons. https://www.astm.org/a0532_a0532m-10.html
3. ISO 1940-1:2003 Mechanical vibration—Balance quality requirements for rotors. https://www.iso.org/standard/21573.html
4. US EPA Air Pollution Control Technology Fact Sheet: Flue Gas Desulfurization. https://www.epa.gov