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Industrial Upgrading Project Supporting Public Auxiliary Facilities (Phase I) Magnetic Pumps

2024-05-23 00:00:00

Sinochem's industrial modernization project, which involves the transfer of chemical media from propylene oxide and styrene tanks, requires several multistage magnetically driven tangential flow pumps.

Project brief

Industry	Petrochemical
Media	Propylene oxide polyether polyol, styrene polyether polyol (corrosive media)
Flow rate	288 m³/h ; 10 m³/h
Head	157m; 135m
NPSHr	Satisfy that the difference between NPSHa and NPSHr is not less than 1m

Special working conditions, pain points and solutions

Special working conditions	Pain Points	Solutions
Corrosive media	Propylene oxide, styrene corrosive conventional materials	Material upgrading: S30408 stainless steel, C-276 isolation sleeve, YWN8 carbide bearing assembly, comprehensive corrosion resistance.
High temperature demand	Magnetic eddy currents tend to overheat components	Cooling design: internal circulation cooling lubrication runner, optimize the thickness of the isolation sleeve to reduce eddy current; equipped with integrated temperature transmitter for real-time monitoring.
Safety and explosion-proof	Chemical tanks require explosion-proof certification	Explosion-proof configuration: ExdIIBT4Gb explosion-proof motor, fully enclosed stainless steel shield, armored cable feed, in line with GB50058 explosion-proof specification.
Long cycle operation	Traditional bearings wear out quickly, high maintenance costs	Structure optimization: axial hydraulic automatic balancing system, SKF bearing + grease lubrication to reduce wear; modular design for quick maintenance.
Leakage risk	Potential isolation sleeve leakage risk for magnetic pumps	Multiple monitoring: Tuning fork level switch leakage alarm, temperature sensor linkage DCS, isolation sleeve minimum thickness 1.5mm, radial safety clearance 0.5mm.