1. Main features
The centrifuge adopts AC frequency conversion drive. In the cycle automatic cycle operation, the frequency conversion stepless speed regulation can meet the requirements of low-speed feeding, high-speed separation, low-speed unloading to the maximum speed. According to the change of material performance, the corresponding speed can be provided to achieve the most optimized operation.
The centrifuge adopts power generation braking when the speed is reduced, converts the mechanical energy of the drum into electrical energy. Through the inverter device LCL filter, it becomes a pollution-free green electrical energy feedback to the grid, the energy saving effect is significant.
The electrical control adopts a programmable controller (PLC), the operation display screen can set the time of each process, can display the real-time working status of each process, the operation is flexible, simple convenient.
The whole machine is realized by the electric, pneumatic mechanical combined control system to realize the fully automatic cycle operation of each process.
The parts of the centrifuge in contact with materials can be made of austenitic stainless steel, titanium alloy, Hastelloy other materials, so that the production process is clean hygienic.
The centrifuge has a compact overall structure stable operation.
Large capacity, high speed, high separation efficiency, large production capacity, high degree of automation, low noise low labor intensity.
2. Working principle
The top suspension centrifuge is mainly composed of a motor, a rotating system, a frame, a casing, a brake, a sugar gate, a honeycomb, washing, an electronic control system. The structure is that the transmission is placed on the upper side, the vertical motor with flange directly drives the spindle to run through the elastic coupling. The rotating drum (the metal thin-walled cylinder with many drain holes) is fixed at the lower end of the spindle. The upper end is suspended in a bearing chamber with a spherical surface by means of a single-row radial thrust ball bearing a short cylindrical roller bearing, is supported on the bearing chamber seat with a spherical surface. A sliding pad (polytetrafluoroethylene) is lined between the spherical surfaces. Play the role of reducing wear, such a set of rotating system is fixed on the frame, a rubber cushion is set between the bearing chamber the bearing chamber seat to form a flexible support. When the unbalanced material produces interference force during the operation of the drum, The spherical surface of the bearing chamber can swing a little. Relying on the damping damping effect of the rubber cushion, the swing amplitude of the spindle operation is controlled within a certain range. At the same time, the damping damping effect of the cushion absorbs part of the vibration energy, which is more effective. Good damping effect. Due to the flexible structure of the spindle system, it has an automatic centering function when running at high speed, so that the machine runs smoothly, safely reliably.
The working principle of this machine is to inject the separated suspension material into the drum. When rotating at high speed, the liquid will be thrown out of the drum by the action of the centrifugal force field, while the solid particles are intercepted by the filter screen laid in the drum. So as to complete the solid-liquid separation.
Top suspension centrifuges are divided into the following two categories according to the discharging method of separating different materials:
·The solid crystal grains are finer the texture is tighter. The drum adopts a cylindrical barrel. The material can be scraped off the wall of the drum through the radial axial movement of the scraper to complete the unloading process. Called "XJZ" type.
·The solid crystal grains are coarser the texture is looser. The rotating drum adopts a conical cylindrical body. The drum is used to stop at low speed. Due to the inertia, the material is loosened the material is discharged by gravity, which is called "XZ" type.
3. Main product specifications parameters
Inner diameter of drum
Overall dimensions (length×width×height)
Four, application areas
The top suspension centrifuge is mainly used for the separation of glucose methyl massecuite. At present, it is also used in other fields, such as ethyl massecuite, mannitol, potassium chloride so on.
With the continuous advancement of separation technology, this machine can also be tried in suspension materials that contain solid crystal grains, are less viscous, have better fluidity, generally have a solid-to-liquid ratio (weight ratio) of 45-60%.