The difference between inclined screen and stacked screw solid-liquid separators

There are significant differences in design and function between inclined screen solid-liquid separators and stacked screw solid-liquid separators, mainly reflected in the following aspects:

Structural differences

• Slant screen solid-liquid separator:
• The structure is relatively simple, mainly composed of inclined screen mesh and driving device.
• Screens are usually made of stainless steel or other corrosion-resistant materials, which can effectively remove solid impurities from liquids.
• It also includes a sieve tray to support the sieve, making it easier for the sieve to self clean.
• Stacked screw solid-liquid separator (also known as a type of spiral solid-liquid separator):
• The structure is relatively complex, consisting of multiple spiral blades stacked together to form multiple spiral channels.
• The core component is the screw conveyor, which performs solid-liquid separation through rotational motion.
• Usually, it also includes parts such as feed inlet, liquid outlet, and slag discharge outlet.

Working principle

• Slant screen solid-liquid separator:
• By utilizing the filtering function of the sieve, solid substances are blocked on the sieve, while liquids enter the underscreen pump through the sieve, achieving solid-liquid separation.
• The spiral auger extracts the dirt from the sieve and cleans it thoroughly through an automatic backwash system.
• Stacked screw solid-liquid separator:
• By rotating the spiral blades, solid particles in the solid-liquid mixture are separated.
• Solid particles move upward under the drive of spiral blades, while liquid flows out through the gaps between the blades, achieving solid-liquid separation.

Separation effect and applicable scenarios

• Slant screen solid-liquid separator:
• Usually suitable for handling liquids containing small amounts of solid impurities.
• The separation effect mainly depends on the pore size and inclination angle of the sieve.
• Mainly used for liquid filtration in industries such as chemical, food, and pharmaceutical.
• Stacked screw solid-liquid separator:
• Suitable for handling liquids containing a large amount of solid impurities or fibers.
• The separation effect is influenced by the design of the spiral blades, rotation speed, and mixture characteristics.
• Mainly used in scenarios such as sewage treatment and sludge dewatering.

operation and maintenance

• Slant screen solid-liquid separator:
• Easy to operate, simply pour the liquid to be processed into the machine and start the driving device to complete the separation.
• Easy maintenance and low cost of screen replacement.
• Stacked screw solid-liquid separator:
• The operation is relatively complex and requires corresponding adjustments based on the characteristics of the mixture to be processed.
• The maintenance cost may be high, but it has a high degree of automation and can operate continuously.