Technical background

Sealless pumps include magnetic pumps (MDP) and shielded electric pumps (CMP), due to their inherent safety characteristics

Dots are widely used for pumping hazardous chemical liquids. But under conventional technology, there is eddy current in unsealed pumps

Loss issue. And as the driving power increases, the eddy current loss will suddenly increase nonlinearly, resulting in power loss

The consumption will reach an unacceptable level, accompanied by an increase in pump heat generation, which limits the adaptability of special working conditions

Use. This is the main technical bottleneck that limits the application of high-power unsealed pumps.

The core technology of Roland magnetic pump

The reason for eddy current loss in unsealed pumps is the use of metal isolation sleeves (MDP) or metal shielding sleeves

(CMP). Because metal conductors induce eddy currents in alternating magnetic fields and consume them in the form of Joule heat

Scatter.

Roland magnetic pump adopts a composite material isolation sleeve. It is reinforced by continuous high-strength glass fiber preforms

Resin based materials. Its molding technology has obtained multiple national invention patents.

The composite material isolation sleeve is lined with fluoroplastic, and its various performance indicators fully meet the requirements of the magnetic pump for the isolation sleeve

All performance requirements of. The characteristic is that the material is a good insulation material, and as an isolation sleeve, it will not generate vortices

Flow loss.

Performance indicators of composite material isolation sleeves

1) Maximum design pressure: 6.0MPa (the isolation sleeve mainly bears the inlet pressure in the pressure distribution of MDP),

(Basically unrelated to outlet pressure)

2) Permissible working temperature: -200~250 ℃ (distinguished by resin materials)

3) Corrosion resistance: Excellent (the isolation sleeve is lined with fluoroplastic, and the composite material does not come into contact with the working medium)

4) Electrical resistivity: 10 17 Ω· cm

Technical characteristics and comparative advantages of Roland magnetic pump

1) Compared with comparable mechanical seal pumps, when driven at high power, the shaft power is basically the same. Compared to conventional unclassified methods

Compared to sealed pumps, the energy-saving effect is very obvious when driven by high power. It is truly an advanced equipment that balances intrinsic safety with high efficiency and energy conservation.

2) Technically, Roland magnetic pumps have no upper power limit.

3) There is no eddy current loss, and the isolation sleeve does not generate heat, making it particularly suitable for situations that are prone to vaporization, aggregation, and decomposition

Liquid pumping.

4) The isolation sleeve does not require internal flushing and cooling. Therefore, a vertical magnetic pump can pump two-phase flow containing solid particles

Media.

Safety and reliability of Roland magnetic pump

1) Security

The Roland magnetic pump is designed with a secondary seal, which is a safety redundancy design. Even if the isolation kit were to be used

Sealing failure will not result in leakage accidents. The key component of the secondary seal is the dry gas mechanical seal, which is

Non contact mechanical seal on the end face. Based on past performance, the probability of failure is extremely low.

2) Reliability

With the increase of magnetic pump specifications, some technical issues hidden in small and medium-sized magnetic pumps may

Highlighted issues such as axial force, eccentric loading of sliding bearings, boundary lubrication, and material thermal expansion differences;

The unilateral magnetic tension and structural strength issues of permanent magnet couplings. After years of research and technological iteration,

Roland magnetic pump provides effective system solutions for the above-mentioned problems. Therefore, Roland magnetic force

The continuous operating life of the pump can reach at least 5 years, which can meet the demand for critical equipment without backup.

3) Pump monitoring

Roland magnetic pump can be equipped with multiple monitoring instrument probes according to requirements, such as sealing isolation sleeves

Real time monitoring of secondary sealing, bearing operating temperature, vibration, and other items can predict operational faults

And traceability.

The Type and Structure of Roland Magnetic Pump

The types of Roland magnetic pumps are not limited to the basic structure and type of the sample release. Except for axial splitting structure

The type and structure of conventional mechanical sealed centrifugal pumps can mostly be designed as magnetic pumps. When the hydraulic models are the same,

The performance parameters are also basically consistent. There are various specific design types and structures according to requirements and actual working conditions

Different changes. Therefore, detailed preliminary technical communication is the key to successful selection.

Market application:

Roland magnetic pumps were initially developed for pumping liquid chlorine and liquid phosgene, and since 2010, there have been

More than 480 units are in service (including exports to foreign countries).

In 2017, Roland high-power magnetic pump was put into operation in the hydrogen peroxide process of Jiangxi Liwen Chemical. Two phases

The project consists of 8 workstations and 8 pumps (without backup, with a maximum power of 280KW), and has been running without any faults so far.

®

The reliability of the product has been recognized by users. The Emergency Management Department issued a statement on July 26, 2023, stating that "

In the first issue of the "Weekly Report on Special Supervision and Verification of Hydrogen Oxide Production Enterprises", the use of pumps by Jiangxi Liwen Chemical Industry

Give positive special recommendations. Later on, multiple hydrogen peroxide companies purchased and used Roland high-power magnetic force

Pump.

At the end of 2023, Hunan Shuangyang Technology (Yueyang) should build a 300000 ton hydrogen peroxide project (fluidized bed process)

We designed and manufactured two large specification magnetic pumps with a capacity of 500KW (hydrogenation liquid pump Q=1250m ³) based on our requirements

/h. H=105m), the types are OH2 and BB2, respectively. Verified by third-party authoritative testing, all performance indicators are

Meet the design and standard technical requirements (with a maximum efficiency of 84% at the design point). According to the agreement, users choose BB2 type

One pump is expected to be put into operation in September this year.

The application fields of Roland magnetic pumps in other chemical enterprises include: propylene, cyclohexane, dichloromethane

Trichloroethane, vinyl chloride, anhydrous hydrogen fluoride, yellow phosphorus, ethylene glycol, butanone oxime, sulfur dioxide, propylene

Acid, phosphorus trichloride (mixed slurry), Freon, electrolyzed saltwater, etc.

Dalian Roland Pump Industry Co., Ltd