VITHY® UHMWPE/PA/PTFE Powder Sintered Cartridge is the filter element of VVTF Precision Microporous Cartridge Filter. Compared to foam, microporous elements are more rigid and less prone to deformation, especially when exposed to acceptable temperatures. Even if the filter cake on the outer surface of the filter cartridge is viscous, it can be easily separated by blowing back with compressed air. For filters using cloth media, it is challenging to separate the filter cake using conventional methods such as self-weight, vibration, backflushing, etc., unless the method of backflushing the filter cake into the bottom raffinate is adopted. Therefore, the microporous filter element solves the problem of the shedding of the viscous filter cake, is easy to operate, and has a simple and compact structure. In addition, after blowing back the filter cake with compressed air, the high-speed air is squeezed out of the pores, and the solid particles captured during the filtration process are discharged by using its kinetic energy. It makes it convenient to remove cake and regenerate the filter cartridge, and reduces the labor intensity of the operator.
The microporous filter cartridge, made of UHMWPE/PA/PTFE, demonstrates strong resistance to various chemicals such as acid, alkali, aldehyde, aliphatic hydrocarbons, and radioactive radiation. It can also withstand ester ketones, ethers, and organic solvents below 80°C (PA up to 110°C, PTFE up to 160°C).
This filter cartridge is specially designed for precise liquid filtration in situations where there is a high amount of solid materials present and strict standards for how dry the filter cake should be. The microporous filter cartridge has outstanding chemical properties. It can be subjected to multiple back-blowing or back-flushing processes, which helps to greatly reduce the overall costs associated with its usage.
In the pre-filtration stage, the slurry is pumped through the filter. The liquid portion of the slurry passes through the filter cartridge from outside to inside, is collected and discharged through the filtrate outlet. Before the filter cake is formed, the discharged filtrate is returned to the slurry inlet for a continuous filtration process until the required filtration requirements are achieved. Once the desired filtering is reached, a signal is sent to stop continuous filtering. The filtrate is then directed to the next processing unit using a three-way valve. The actual filtering process starts at this stage. Over time, when the filter cake on the filter cartridge reaches a certain thickness, a signal is sent to stop the slurry feed. Fluid remaining in the filter is drained and a signal is then activated to initiate a blowback sequence using compressed air to effectively remove the filter cake. After a certain period of time, the signal is sent again to end the backflushing process, and the filter drain is opened to discharge. After the process is complete, the outlet is closed, restoring the filter to its original state and making it ready for the next filtration cycle.
● The filtration rating can achieve as low as 0.1 micron.
● It offers efficient back-blow/back-flush capabilities, ensuring a long-lasting and cost-effective solution.
● It demonstrates exceptional resistance to chemical corrosion, with the ability to withstand most solvents below 90 °C. It is also odorless, non-toxic, and does not dissolve or emit any peculiar smells.
● It possesses temperature resistance properties with PE being able to withstand temperatures up to 90 °C, PA up to 110 °C, PTFE up to 200 °C.
● The recovery of both filtrate and liquid slag is carried out simultaneously, leaving no waste.
● The use of tightly sealed filtration guarantees a clean production process without any harm to the environment.
● This technique has gained significant popularity in various industries, including fine chemicals, biopharmaceuticals, food and beverage, and petrochemicals. It is particularly useful in achieving precise solid-liquid filtration for substances like activated carbon decolorization liquid, catalysts, ultrafine crystals, and other similar materials, where a large filter cake volume and high dryness are necessary.
● Filtration and cleansing of extremely small products like catalysts, molecular sieves, and fine magnetic particles.
● Accurate filtration and cleansing of the biological fermentation liquid.
● The fermentation, filtration, and extraction of the first filtration; the precision refiltration to remove precipitated proteins.
● Precise filtration of powdered activated carbon.
● Precise filtration of medium to high-temperature oil products in the petrochemical sector.
● Precise filtration of primary or secondary brine during chlor-alkali and soda ash production.
