Magnetic drive pump chemical process project case

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Multifunctional elastomer monomer device magnetic pump project case

2024-11-26 00:00:00

Design and supply of 2 sets of high-reliability magnetic drive pumps for Wanhua Chemical Multi-functional Elastomer Monomer Unit, used to transport solid particles, high temperature, high viscosity, toxic and hazardous media. The project should meet API685-2022 standard and Wanhua Q/0600 YPU 432-2023 technical specification to ensure safe, efficient and leakage-free operation.

Project brief

Industry	Chemical (in the field of high-performance chemicals and new materials)
Media	PPDI/BPPDI/TAR mixture (45% solids), chlorobenzene (MCB); esters (NDI/Theya, 5% solids)
Flow rate	1 m³/h (max. 2 m³/h); 0.66 m³/h (max. 1.5 m³/h)
Head	36m; 40m
NPSHr	=2.3m; =1.5m

Special working conditions and customer pain points

Special working conditions:

Media complexity: 45% solids content, particle size 15-50μm, easy to cause wear and clogging in the pump.
Temperature and corrosion: the media temperature up to 138.7 ℃, containing corrosive components, high temperature and corrosion resistant materials.
safety risk: the medium is flammable and explosive, need to meet the explosion-proof requirements and avoid leakage.

Customer pain points:

Conventional sealing methods are prone to failure and leakage.
High solid media leads to rapid wear of conventional bearings and high maintenance costs.
High temperature metal insulation sleeve is easy to generate eddy current heat, resulting in vaporization of the medium.

Core Solutions

Non-contact magnetic drive:

Reverse drive magnetic circuit design is adopted to prevent impurities from entering the sealing surface.
Hastelloy (C-276) insulating sleeve, thickness ≤ 1mm, high resistance to reduce eddy current heat.

Wear-resistant material optimization:

The shaft sleeve/thrust ring is made of tungsten carbide (YWN8), and the plain bearing is made of pressureless sintered silicon carbide (SSiC), which is wear-resistant and corrosion-resistant.

Lubrication and cooling system:

Internal circulation flow path optimization, precise calculation of cooling flow, ensure bearing heat dissipation and lubrication efficiency.
Automatic axial force compensation technology reduces axial system wear.

Condition Monitoring: