Analysis of temperature reduction of the plate heat exchanger?

Before the supersaturated sodium aluminate liquid enters the seeding tank for decomposition, the liquid needs to be cooled in the production of alumina. The temperature of the slurry that enters the seeding tank after mixing with the refined seed meets the requirements of the decomposition process (5663℃). Aluminum hydroxide with high decomposition rate, coarse particle size and good quality. A factory uses Bayer's method to produce alumina. The original design of the sodium aluminate liquid cooling process is a plate heat exchanger and vacuum cooling in series. Later, the floating liquid in the mother liquid of the vertical plate was recovered, and the plate heat exchanger was changed and transformed to form a liquid cooling process in which the plate heat exchanger is connected in series and then connected in series with the vacuum cooling. At the same time, the temperature of the mother liquid of the riser as a cold phase for heat exchange has been greatly increased, and good conditions have been invented for reducing the steam consumption in the evaporation process. High Quality Titanium Wire
Stacked at intervals. The edges between the plates are sealed with gaskets, and the plate heat exchanger is made of thin metal plates that are corrugated while forming a narrow flow channel. The cold and hot fluids flow on both sides of the plate, and exchange heat through the metal plates. The four corners of the plate are provided with flow channel holes, which constitute a fluid distribution pipe and a collecting pipe. The two ends of the whole equipment are tightly sealed with movable end caps and fixed end caps. The gap between the plates is 26mm. astm b348 titanium bar
The main advantage of the plate heat exchanger is that when the fluid flows on the corrugated surface, it changes the flow direction from time to time, destroying the stagnation flow and forming Artificial turbulence makes the medium reach turbulent flow at a low flow rate. The heat transfer coefficient is large, the structure is compact, and the heat transfer area per unit volume is large. It has a 2501250m2 heat transfer area per cubic meter volume. It is very convenient to disassemble, clean, overhaul, increase or decrease the plate to adjust the heat transfer area, and the operation flexibility is great. Gr9 Titanium Seamless Tubes For Bike Frame
But the flow channel of the medium is narrow and easy to block. The heat dissipated by the hot phase of the plate heat exchanger is transferred to the cold phase through the corrugated metal thin plate so that the cold phase absorbs the heat and the energy is utilized. The boiling temperature is low, and the vacuum cooling is based on the relationship between the boiling temperature and pressure of the solution in a closed container. Low pressure. Under vacuum, the boiling temperature is lower than that under normal pressure. The higher the vacuum, the lower the boiling temperature.  Titanium Planar Sputtering Target
When the high-temperature sodium aluminate liquid enters the vacuum container, because its own temperature is higher than the boiling temperature under the vacuum condition, the liquid achieves the purpose of lowering the temperature while performing self-evaporation. The evaporated gas is condensed by circulating cooling water and then cooled by circulation The water circulates and the liquid is concentrated and cooled. In the vacuum cooling process, part of the self-evaporated heat is taken away with the circulating cooling water and released to the air in the circulating water tower; the other part is discharged into the air with the vacuum pump. The heat of liquid self-evaporation is not reused.