Which is better, Multi disk screw press or plate and frame filter press？

 

Multi disk screw press and plate frame filter press each have their own advantages and disadvantages, and their applicable scenarios are also different. The following is a detailed comparison of the two:

working principle

Multi disk screw press: uses the rotation of the screw shaft to push the sludge forward. In the concentration and dewatering sections, as the pitch of the screw shaft and the filter gap between the fixed ring and the moving ring gradually decrease, as well as the blocking effect of the back pressure plate, a great internal pressure is generated, which continuously squeezes out the water in the sludge, thereby achieving sludge dewatering

Plate and frame filter press: By applying pressure through hydraulic or mechanical devices, the sludge is placed in the filter chamber composed of filter plates and frames. The water is discharged through the filter cloth, and the solid particles are trapped in the filter chamber to form a filter cake, achieving the purpose of solid-liquid separation

Equipment structure and footprint

Multi disk screw press: With a compact structure and exquisite design, it usually includes an electric control cabinet, metering tank, flocculation mixing tank, and dewatering machine body. It has a high degree of integration, small footprint, easy installation and maintenance, and is suitable for places with limited space

Plate and frame filter press: composed of multiple filter plates and frames, the equipment has a large volume and relatively complex structure, requiring a large amount of space for installation and operation. In addition, maintenance work such as disassembly, cleaning, and replacement of filter plates and frames also requires a certain amount of space

Dehydration effect

Multi disk screw press: It has good dewatering effect and can achieve high dewatering rate. Usually, the moisture content of sludge after dewatering can be below 80%. It can also achieve good dewatering effect for some low concentration and high humidity sludge

Plate and frame filter press: The dewatering effect is relatively good, with a high solid content in the filter cake and a dewatering rate generally between 60% and 80%. The dewatering effect is more significant for high concentration and low humidity sludge, which can significantly reduce the moisture content of the sludge and obtain a drier filter cake, which is beneficial for subsequent sludge disposal

Scope of application

Multi disk screw press: Suitable for various types of sludge, especially low concentration and high humidity sludge, such as sludge from domestic sewage treatment plants, organic sludge from the food processing industry, sludge from the pharmaceutical industry, etc. It is also skilled in dewatering oily sludge and has relatively high requirements for sludge properties. It is not suitable for treating sludge containing a large amount of impurities such as fibers and hair

Plate and frame filter press: widely used in industries such as chemical, dye, petroleum, ceramic, pharmaceutical, sugar, starch, paint, metallurgy, and sewage treatment. It is suitable for treating high concentration, low humidity sludge, as well as suspensions with high compressibility or near incompressibility of filter residue. It has strong adaptability to materials, but for some sludge with high viscosity, oil or organic content, filter cloth blockage may occur

Operation and maintenance costs

Multi disk screw press: The device has a simple structure and fewer components. Daily maintenance mainly involves checking and replacing vulnerable parts such as screw shafts and moving rings, resulting in relatively low maintenance costs. And it has self-cleaning function, which does not require a lot of cleaning work to prevent filter blockage, reduces flushing water consumption and internal circulation burden, low energy consumption, and low operating costs

Plate and frame filter press: The equipment is relatively complex and requires regular replacement of filter cloth and maintenance. The cost of purchasing, storing, and replacing filter cloth is high, and manual cleaning of filter cloth is labor-intensive and time-consuming. In addition, the energy consumption of plate and frame filter press is relatively high, and the operating cost is also relatively high

Degree of automation

Multi disk screw press: With a high degree of automation and the use of an automated control system, it can achieve functions such as automatic feeding, automatic dehydration, and automatic unloading, reducing manual operations and improving production efficiency. Operators only need to perform simple settings and monitoring, and the skill level requirements for operators are relatively low

Plate and frame filter press: The degree of automation is relatively low, and manual operations such as pressing, loosening, and unloading of filter plates are usually required. The labor intensity is high, and the skill level and experience of operators are required. However, there are also some plate and frame filter presses with high degree of automation available for selection

 

Note: You can write to us or leave a message at any time to get technical support or solutions.

Email: info@tnwcn.com

Feedback: Click here