Views: 2036 Author: Dasen Publish Time: 2018-12-31 Origin: Site
The inorganic ceramic membrane is a precision ceramic filter material with a porous structure formed by sintering at a high temperature such as alumina, titania or zirconia. The porous support layer, the transition layer and the microporous membrane layer are asymmetrically distributed, and the filtration precision covers microfiltration. , ultrafiltration and even nanofiltration. Ceramic membrane filtration 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 clarified permeate containing small molecular components is driven through the membrane in a direction perpendicular to the pressure driven by the pressure. The turbid concentrate of the macromolecular component is trapped by the membrane, thereby allowing the fluid to be separated, concentrated, and purified.
Membrane is an inorganic or polymeric material with a special selective separation function. It can separate the fluid into two parts that are not connected, so that one or more substances can pass through and separate other substances. Membrane separation technology has been widely used in medicine, water treatment, chemical, electronics, food processing and other fields due to its high efficiency, energy saving, environmental protection and molecular grade filtration. It has become one of the most important technologies in this century. Membrane technology, recognized as one of the most important industrial technologies in the 21st century, is an emerging green industrial technology.
Inorganic membranes, especially ceramic membranes, have increasingly shown their strong competitiveness due to their superior mechanical, chemical stability and good retention capacity. They have stable operation in the treatment of oily wastewater, good effluent quality, small footprint and expansion. Convenient, normal operation, no consumption of chemicals, no new sludge, and good quality of recovered oil. Ceramic membranes have outstanding advantages such as acid resistance, alkali resistance, corrosion resistance and organic solvent resistance, and are easy to clean. High volume and long service life.
At present, the main application fields of inorganic ceramic membrane for oily wastewater treatment are oilfield produced water treatment, metal cleaning fluid, steel rolling emulsion treatment and petrochemical, spray line degreasing cleaning liquid treatment, oil alkali refining sewage treatment, galvanizing line degreasing Treatment of cleaning fluid, printing wastewater, and oily wastewater treatment in the chemical industry.
I believe we can see that inorganic ceramic membranes are also relatively easy to understand, namely alumina, titanium oxide, zirconia and other high-temperature sintered precision ceramic filter materials with porous structure, and the characteristics of inorganic ceramic membranes are also More.