Disc Clarifier

Working Principle

There are many types and specifications of disc centrifuges, but in terms of the essence of their separation process, they can be basically divided into two processes: centrifugal clarification and centrifugal separation. The disc centrifuge can quickly and continuously separate solid-liquid and liquid-liquid. It is a type of vertical centrifuge. The drum is installed on the upper end of the vertical shaft, and is driven by a motor to rotate at a high speed through a transmission device. There is a small gap between the disc and the disc. The suspension (or emulsion) is fed into the drum from a feed tube located in the center of the drum. When the suspension (or emulsion) flows through the gap between the discs, the solid particles (or droplets) settle on the discs under the action of the centrifuge to form a sediment (or liquid layer). The sediment slides along the surface of the disc to break away from the disc and accumulate in the largest diameter part of the drum, and the separated liquid is discharged from the liquid outlet of the drum.

Structure

The disc centrifuge is mainly composed of an inlet and outlet device, a drum, a cover, a vertical shaft, a horizontal shaft, a machine base, a motor and an automatic control box.

1. Import and export device

In addition to visually seeing the liquid conditions before and after separation, the inlet and outlet devices can also adjust the separation effect by adjusting the flow control valve on the device. A sampling device is installed on the upper part of the cover, and the effect is achieved by sampling and testing.

2. Drum part

The drum part is the part that completes the material separation process and rotates at high speed, and is the heart of the machine. It is connected to the vertical shaft through a high-precision taper fit to gain power. The parts of the drum part have factory serial numbers and cannot be interchanged. The disc set is installed on the distributor in the sequence of numbers, and the disc press cover and the drum cover are pressed against the drum body by the disc press cover. Note that the phase marks on each part must be aligned. In order to ensure that the balance before leaving the factory is not destroyed. Otherwise the device must not be started.

3. Vertical shaft part

The vertical shaft transmits power and is equipped with a speed-increasing gear (small helical gear) and rotates at high speed. Because both the axial and radial directions are elastically supported, the working position of the rotating drum and the centrifugal pump, the rotating drum and the water inlet cover can be obtained by adjusting the lifting height of the vertical shaft. The height of the vertical shaft has been adjusted and locked before leaving the factory. Without the guidance of our factory professionals, it is not allowed to adjust the height of the vertical shaft at will. The bearings on the vertical shaft are high-precision imported bearings, and are not allowed to be replaced by ordinary bearings.

4. Horizontal axis part

The horizontal shaft is the main part that transmits the power of the motor to the vertical shaft and the drum. It is composed of motor, coupling, hydraulic coupling, transmission shaft, large helical gear and brake wheel and other parts. Its structure is compact and its operation is stable. The hydraulic coupling is used for transmission, and it also plays the role of overload protection. The large helical gear continuously splashes lubricating oil to each transmission bearing during operation, so that all bearings are well lubricated.

The braking device is used for the machine to quickly pass through the resonance speed area of the machine when it is stopped, reducing the parking time and avoiding the damage of the machine caused by resonance.

5. Cover

The cover is the part that connects the fuselage and the inlet and outlet devices. It consists of an upper cover, a lower cover and a water inlet cover. The adjusting shim on the top of the upper cover is used to adjust the height of the centrifugal pump to ensure that the centrifugal pump is in the best position, and that the rotating drum parts and the centrifugal pump rotating at high speed will never rub against and damage the parts. The height has been strictly adjusted correctly before leaving the factory, and the general user does not need to change it. Unless it may be adjusted when overhauling the vertical shaft.

The lower cover is mainly used as a slag discharge channel, and is designed with a through hole specially used for assembling and disassembling the small piston and valve body. There is no need to disassemble the whole drum. Note that in each installation and disassembly process, the surface of the parts must be cleaned and lubricated evenly to prevent damage to the sealing ring.

Parameter List