The Multotec hydrocyclone range comprises cyclone diameters from 25 to 1 400 mm. Most of these diameters can accommodate a range of cone angles, while different vortex finders and spigot diameters are standard for all diameters.
The small diameter cyclones, up to 100 mm, are predominately polyurethane, while the larger diameter units can be supplied in polyurethane, steel cyclones with bonded or loose rubber lining, and steel with ceramic lining.
Scrolled evolute design:
Multotec has proven that the scrolled evolute and ribbon inlet cyclone designs have a much higher capacity when compared to standard inlet designs. The result is that vortex finder wear is substantially reduced, thereby lowering operating costs while maximising hydrocyclone separation efficiency.
The benefits of weep holes in the cyclone:
If the hydrocyclone liner becomes damaged, the material which finds its way between the liner and the cyclone shell will begin to ‘weep’ from these holes, indicating that the liner needs to be replaced. This drastically reduces unplanned stoppages and will extend the life of the hydrocyclone’s steel shells.
Weep holes also reduce the frequency of internal hydrocyclone inspection. This is because cyclones without weep holes require regular inspection to assess the integrity of the liner itself.
Silicon carbide (SiC) lined cyclone components
To improve our cyclone component wear characteristics, and to ensure they can be used in highly aggressive applications, MPE cyclones has been developing and supplying SiC (Silicon Carbide) lined cyclones and components.
All trial applications have shown excellent results.
Cyclones are selected and sized by Multotec’s experienced process team using our specialised CY-i cyclone sizing software to achieve optimum centrifugal forces and cut points to best suit your precise requirements. For specialised applications Multotec can custom design and manufacture a cyclone to meet your application.
Hydrocyclones need to be correctly maintained to ensure they operate at peak separation efficiency. Your local Multotec branch has the necessary expertise to help ensure your cyclone reliably delivers your required cut points and process parameters, with short lead times on any hydrocylone spare parts you may need.
Maintenance should preferably be done on every maintenance shutdown in order to allow for internal inspection. Your local Multotec service crew will provide end-to-end cyclone inspections and servicing, which includes:
Maintaining optimum cyclone pressure
With the Multotec pressure gauge installed on your cyclones, plant operators will be quickly notified if there is any surging or pressure drop in the hydrocyclone feed. The reading on the pressure gauge will allow for an accurate calculation of volumetric flow rates to the hydrocyclone which will make it possible to calculate the mass flow rate.
Lower cyclone pressure results in inefficiencies while high pressure increases the centrifugal force beyond its design specifications, which increases cyclone wear rate. Ensuring your cyclone operates in the optimum pressure range helps reduce costly potential downtime, and improves downstream processing performance.
iSPi Camera Inspection
Multotec has developed the Internal Surface Photographic Inspection (iSpi) system for cyclones. By making use of a 360° camera, our application engineers are able to offer a system which enables them inspect the inside of a customer’s cyclone in-situ and with minimal effort.
When used in conjunction with a coloured dot tile, iSPi can also help detect the remaining life on Alumina lined cyclones.