In the filtration field of water desalination and purification, drug refining and fractionation, wastewater treatment, fuel and oil filtration, blood component separation, protein purification and separation treatment, the filter medium and the entire filter element can be accurately determined. The characteristic parameters are very important. The technology and equipment of capillary flow pore size analysis can provide you with the following information: The liquid flow rate and pressure drop of the filter medium, the filtration efficiency of the medium for various sizes of particles, the clogging of the filter medium Or the absolute level of fouling speed and filter integrity.
Whether your needs are quality control or research development, a capillary flow pore size analyzer provides all the required pore structure information. The tests performed include:
l bubble point pressure, maximum pore throat diameter, minimum aperture
l Average flow aperture
l Through hole diameter distribution in parallel or vertical direction
l Filter integrity
l gas permeability
l liquid permeability
l Frazier penetration rate
l Gurley penetration rate
l Through hole surface area
working principle:
Place a sample that is completely saturated with the wetting fluid in the sample chamber. The sample chamber is sealed and then flows from the front of the sample to the sample chamber with a gas. The gas pressure is controlled by a computer to slowly increase until it reaches a maximum aperture. Corresponding liquid capillary action. This is the so-called bubble point pressure. When the pressure is further increased in small increments, a measurable gas flow is formed until the flowable liquid is emptied. Dry samples are also produced. Flow rate versus pressure data and store and display it in real time. The computer calculates all pore parameters. The basic relationship of the flow porosimeter is based on:
D=4γCos θ/ p
D = pore diameter in the formula
γ = surface tension of liquid
θ = contact angle and p = differential pressure
application:
In many industrial fields, filter materials are widely used in process control.
In addition to its main role in the traditional chemical industry, some innovative filter media have become biological, pharmaceutical, environmental, battery, fuel oil and oil, non-woven, food processing and packaging, household goods, clothing and hygiene products, An important foundation for the paper and printing industry. Polymeric, metallic, ceramic and textile porous materials have been widely used in filtration processes.
Typical examples of filter media functions are: separation of fluid components, selective permeation of nutrients and drugs, proper isolation of bacteria, viruses and pollen, selective permeation of water and gas, increased reaction rate, isolation of heavy metal ions, dust and toxic gases To prevent water transfer, control the penetration of ink into the X, Y, and Z directions of the paper.
Features:
l Use one instrument to get all the data mentioned above
l Data repeatability is good
l The measured data reflects the size of the through-hole, that is, the pore that contributes to the flow, and does not contain blind holes.
l Measured directionality, can be used to study the pore structure of anisotropic or layered media
l Fully automatic operation, only a few minutes for each test
l Data acquisition, storage and processing software on the Windows platform
l Use a low surface tension, liquid with a contact angle close to zero
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