Wastewater-&-Exhaust-Gas-Treatment

Corrosion-Resistant Pumping Solutions · The Core Power of Environmental Protection Processes

Environmental engineering fluid handling is defined by highly corrosive media, high solids content, and variable-load operation | In wet FGD applications, limestone slurry pH is maintained at 4.5–5.5, while chloride ion concentration can accumulate to 60,000–80,000 ppm, posing severe pitting and crevice corrosion challenges to pump materials. Meibao Pumps draws on 30 years of fluoroplastic and specialty alloy application experience to deliver MB-F fluoroplastic pumps, MB-MD magnetic drive pumps, and MV-S vertical sump pumps—covering the entire process chain from acid-alkali neutralization and flocculant dosing to gypsum slurry discharge. Our pumping equipment is designed for a continuous-duty service life of 87,600 operating hours (10 years), significantly reducing maintenance replacement frequency in environmental facilities.

Lift pumps, return sludge pumps, and waste sludge pumps in municipal WWTPs and industrial effluent stations face combined abrasion and corrosion | Aeration tank mixed liquor typically contains 1.5%–3.0% solids, with sand particles in the 50–200 μm range—cast iron impeller wear rates can reach 0.5 mm/month. Meibao MB-D diaphragm metering pumps are engineered for precise chemical dosing, delivering ±0.5% accuracy and reducing flocculant consumption by an average of 12%–18%. In a side-by-side trial at a 200,000 m³/day WWTP in Guangdong, annual chemical cost savings exceeded CNY 430,000. MV-S vertical sump pumps utilize duplex stainless steel or titanium wetted components, suitable for tank depths of 4–12 meters in aeration and sludge thickening basins, with maintenance-free bearing life of no less than 25,000 hours.

Slurry circulation pumps and ammonia water transfer pumps in FGD/SCR systems are mission-critical for compliance at coal-fired power plants and steel sintering lines | Gypsum crystal hardness (Mohs 3.5–4.0) combined with flow velocities (4.5–7.5 m/s) results in wear rates 20–50 times higher than clear-water conditions. Meibao's MB-F heavy-duty lined pump for FGD duty incorporates 6.0–8.0 mm ultra-thick fluoroplastic lining with a high-chromium cast iron backing. In field measurements at a 2×660 MW power plant in Shandong, impeller service life reached 14,200 hours—2.3 times longer than conventional rubber-lined pumps. Meanwhile, the MB-MD magnetic drive pump's seal-less configuration is widely adopted for ammonia water (15%–25%) and NaOH caustic transfer, eliminating fugitive VOC emissions—the most sensitive environmental compliance concern.