Working principle of pressure screen

(1) The working principle of the pressure screen adopts an upward flow structure design with bottom slurry feeding, bottom heavy slag discharge, and top light slag discharge, effectively solving the above problems. Light impurities and air in the slurry naturally rise to the top slag discharge port for discharge, while heavy impurities are discharged

1. Working principle

The pressure screen adopts an upward flow structure design with bottom slurry feeding, bottom heavy slag discharge, and top light slag discharge, effectively solving the above problems. Light impurities and air in the slurry naturally rise to the top slag discharge port for discharge, while heavy impurities can settle to the bottom and be discharged as soon as they enter the machine body. In this way, on the one hand, it effectively shortens the residence time of impurities in the screening area, reduces the possibility of impurity circulation, and improves the screening efficiency; On the other hand, it prevents damage to the rotor and screen drum caused by heavy impurities and prolongs the service life of the equipment.

(2)Structural performance

1. Screen drum: A screen drum with a fine screening gap width of H0.15mm, which uses water jet cutting technology to groove on an 8mm thick steel plate, forming excellent circular holes and burr free grooves, without generating stress and groove end cracks like mechanical washing and grinding grooves. And it can provide a hardness coating process to improve wear resistance.

2. Rotary rotor: The slurry rotor is equipped with 3-4 rotors, which are strictly calibrated for balance after assembly, ensuring that the rotor does not produce vibration during high-speed rotation. The rotor is installed on the main shaft, and the rotor is mounted on the rotor through a screw. The gap between the rotor and the sieve drum can be adjusted. The coarse screening rotor adopts a drum type external rotor structure and is calibrated for dynamic balance. This structure can prevent impurities from winding around the rotor and affecting the normal operation of the equipment.

3. Shell: composed of an upper cover and a cylinder, with a tangential slurry inlet pipe at the lower part of the cylinder. There is a slurry discharge pipe in the middle of the cylinder, and the upper cover is equipped with a slag discharge port and a flushing port.

4. Transmission device: including motor, pulley, V-belt, belt tensioning device, main shaft and bearings.

(3) Maintenance and upkeep

During the application process of pressure screen, scaling occurs due to factors such as process water, calcium magnesium hardness, pH value, conductivity, total alkalinity, temperature, etc., which can cause the following hazards:

1. Increase the number of unplanned shutdowns, causing production interruptions and affecting the production efficiency of the device. Shutdown cleaning increases maintenance costs and additional labor load;

2. Causing paper disease and affecting product quality;

3. Increase the consumption and pollution load of chemicals;

4. Causing production accidents and reducing equipment lifespan;

5. Increase energy loss.