Steam permeation is a new membrane separation technology. The separati↓on process of steam mixture or steam mixture is different from that of noεn condensable gas mixture in terms of solubility and "diffusion rate of dense membrane. The organic solvent vapor phase feed is int roduced on the side of the vapor permeation membrane, while the o¶ther side is evacuated in a vacuum suction way to get the pure o±rganic solvent in time.
Principle of separation
During the process of steam permeation membrane dehydration, the steam com↕ponents of water vapor enter the feed side of membrane βmodule after preheating, while the permeating side ad≥opts vacuum to maintain a low pressure environment. At the← feeding side, the water molecules first adsorb on the surface of the memb≥rane, and the membrane is permeated by the difference of water vapor pressu≥re difference between the two sides of the membrane. After the seβparation operation, the waterless products are obtained at the exit side of the membrane feed side, and the osmosis side components are tr'eated by the waste water after condensation.
The steam permeation membrane experimental device is a laboratory steam permeable membr♠ane system, which is used to test the permeation flux of steam permeab✔le membrane under certain temperature and pressure difference, it mainly incl←udes material liquid system, steam permeable membr'ane, osmotic liquid collection system, evaporation system, etc.. The f★eed liquid enters the steam permeable membrane, and the latt↓er maintains low partial pressure. The components move away from the membrane through the membrane to the back side of the membrane, it isα driven by the partial pressure difference of components on both sides of the membrane. Among tγhem, the components with fast diffusion are mostly passing through the membrane into the ←back side of the membrane, and the slower diffusion component has less permeable membrane into the rear side of the membrane, so that we can achieve the purpose of separating the dif§ferent components in the liquid.
Technical characteristics
Organic solvent dehydration is made by pervaporation membrane separation technology, iφn this way, traditional separation methods such as distillation, extraction and adsorption can b<e replaced. It can achieve high quality products with low energy consumption and a chieve separation requirements which are difficult or una<ble to achieve by conventional methods. It has a more obvious advantage in removing organi©c matter or mixed organic matter from small or micro amounts of water.
A. High efficiency "and energy saving: yield 99% energy saving 50%
The core of the pervaporation technology is to use the selective permeability of the pαervaporation membrane to make a small amount of water through t✘he separation membrane in the organic solvent, while most of the materials are kept on the other side of the membrane. The separation process shows high< energy saving effect, especially suitable for separation of azeotr≥ope and near boiling mixture. Compared with traditional rectification and adsorption t÷echnology, the separation process can save more than 50% energy, and the≠ yield is >99%.
B. Environmentally friendly: no third components are introduced or produced, and the quality of the product is high.
Pervaporation technology is applied to remove water from organic solvent✔s. It does not need to introduce third components to avoid pollution to enviro×nment or products. At the same time, a small amount of permeatio n liquid can be recycled, processed and recycled, which is also good for en←vironmental protection.
C. Space saving: compact structure, small area∞ covering.
The pervaporation equipment has compact structure, small area covering and §high utilization rate of resources. Compared with the distillation separation equipment, it c>an save more than 4/5 of space.
D. Easy and safe: easy to operate, high safety
The process of pervaporation membrane separation is simple, the operating conditions is m∏ild, the degree of automation is high, therefore, the operation process ha☆s high safety and is more suitable for the dehydration of flammable and explosive solvαent system.
Application areas
