|Pressure Vessel Class||Ⅱgrade|
|Designing pressure||0.35Mpa for tube, 0.45Mpa for shell|
|Pressure-tight test||0.44Mpa for tube, 0.57Mpa for shell|
|Designing temperature||120℃for tube, 50℃ for shell|
|Max working pressure||0.3Mpa for tube, 0.4Mpa for shell.|
|Heat exchange area||151m2|
|Media||4% NaCl solution|
|Tube material||Grade 2 titanium|
|Shell material||Grade 2 titanium|
|Application||Vacuum salt production project|
With the continuous completion of vacuum salt-making manufacturers, the severe corrosion of high temperature and strong brine on vacuum salt equipment directly affects the normal operation of equipment capabilities and the normal operation of production. Due to the problem of the preheater, the preheating of the raw material salt water has not passed. Most salt-making manufacturers have evaporated salt water of about 30℃ with the evaporation tank. Except for the condensation water recycled to boiler from the I-effect heating chamber, the condensation water of the remaining heating chambers is not recycled, causing a large amount of heat energy loss. Actually the designer also considered the comprehensive use of thermal energy, as early as 1968, in the design of the salt industry engineering design, there was a preheating device for salt water. The leakage of the pipe and the heating pipe caused the discontinuation of production and affecting the normal operation of production. In less than a year, the salt water heater was forced to abandon.
Titanium Grade 2 is an industrial titanium with a single alpha phase, which has excellent resistance to the corrosion of seawater and anti-chloride solution and the performance of fluids. Titanium is not sensitive to pitting corrosion, contact corrosion, wear corrosion, and stress corrosion. And the corrosion of titanium in wide seams is much smaller than that in narrow seams. So in the vacuum salt industry, grade 2 titanium tubes and titanium plates are commonly used to make titanium preheaters.