Take you to understand Dijie silicon carbide ceramic membrane-Hubei Dijie Film Technology Co., Ltd

Silicon carbide ceramic membrane is a new generation of inorganic ceramic membrane, let's learn about silicon carbide ceramic membrane!

● Silicon carbide material

Structure: silicon carbide aka emery or moissanite; There are two basic varieties of black silicon carbide and green silicon carbide, and the crystal structure of silicon carbide is divided into hexagonal or rhombohedral α-SiC and cubic β-SiC.

Performance: Silicon carbide chemical properties are stable, almost not etched with solvent within 1500 °C; High thermal conductivity and small thermal expansion coefficient; Good wear resistance, great hardness, Mohs hardness of 9.5, second only to hard diamond (grade 10).

Uses: functional ceramics, refractories, abrasives and metallurgical raw materials.

● Silicon carbide ceramic film

Silicon carbide ceramic membrane is a kind of inorganic membrane, which belongs to the solid membrane material in membrane separation technology. Silicon carbide ceramic film is fired at a high temperature above 2000 °C, the particle surface is smooth and round, the support layer, each layer has no closed pores and channels, usually composed of three layers of structure with different pore sizes (porous support layer, transition layer and separation layer), with asymmetric distribution, pore size specifications of 0.04μm, 0.1μm, 0.5μm, 1μm, 3μm.

Silicon carbide ceramic film is a recrystallization firing process, fired at a temperature higher than 2000 °C, the particle surface is smooth and round, the channel connectivity is good, and there is no closed pores and channels.

● Silicon carbide ceramic membrane filtration principle

The silicon carbide ceramic membrane separation process is a fluid separation process in the form of "cross-flow filtration": the raw material liquid flows at high speed in the membrane tube, and the clear permeate containing small molecular components penetrates the membrane perpendicular to the membrane under pressure drive, and the turbid concentrate containing macromolecular components is intercepted by the membrane, so that the fluid achieves the purpose of separation, concentration and purification.

● Performance characteristics of silicon carbide ceramic film

Chemical stability, no reaction with chemical reagents: solid-liquid separation under strong acid, strong alkali and strong corrosion conditions, and can be cleaned with organic solvents, easy to clean, easy to restore the initial flux of the membrane

Good thermal stability, thermal shock resistance: stable operation under high temperature conditions.

High open porosity and large flux: Compared with conventional tubular membranes, the equipment has high integration, small footprint, low energy consumption and low investment.

The film has high bonding strength and good wear resistance: the service life is more than 10 years

Hydrophilic and oleophobic: It has excellent oil-water separation effect, and the channel can reach 300L/㎡*h when the membrane effluent quality meets the standard requirements.

● Application field of silicon carbide ceramic membrane

As a new generation of filtration technology, silicon carbide ceramic membrane is widely used in the purification and recovery of strong acid and alkali in the chemical industry, the refining of chlor-alkali chemical brine, the recovery of catalysts and oil-water separation in petrochemical and coal chemical industry; Machining cutting fluid purification and recovery; Digital purification of biopharmaceutical antibiotics, enzymes, pharmaceutical intermediates, amino acids, organic acids, vitamins and Chinese herbal medicines; Food fermentation broth, (sulfur-free) sucrose, starch, protein, (health) alcohol, fruit juice, food additives, sweeteners, natural pigment extraction, tea deep processing, condiments (soy sauce, vinegar) and other food industry clarification, purification, separation and concentration; At the same time, it has been widely used in environmental protection fields such as oily wastewater, metallurgical wastewater, chemical wastewater, papermaking wastewater, printing and dyeing wastewater, electric power, iron and steel industry desulfurization wastewater and zero discharge, ship desulfurization wastewater, heavy metal and rare metal recycling, ultrafine nano powder recovery in new energy industry, landfill leachate, oil-water separation of kitchen waste, biogas liquid purification, decolorizing agent recovery, nuclear power special wastewater purification and so on.

● Hubei Dijie Film Technology Co., Ltd. is a silicon carbide ceramic membrane manufacturer with independent intellectual property rights, is a technology-based enterprise integrating R&D, production, sales and technical services of silicon carbide ceramic membrane, and has more than 20 independent intellectual property rights related to silicon carbide ceramic membrane products.

Want to know more about the performance and engineering application cases of silicon carbide ceramic membrane, welcome to inquire!

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