vapor feed heater
air ejector condenser
saltwater heater
distillate cooler
第1题：
greater distillate purity through high temperature evaporation
cold shocking for scale removal is not required
less internal corrosion because of lower brine density
less feed-water is required for equal plant capacity
第2题：
a separate air ejector unit
a direct unimpeded connection between second stage and salt water feed heater
either by vacuum drag or an external line from the first stage via a fixed orifice
the fixed orifice provided in the steam supply line
第3题：
Which of the listed problems could produce a high absolute pressure within a flash type evaporator?
A.production of high salinity distillate
B.seawater feed temperature below 165℃
C.a leak in the first stage demister
D.a cracked distillate pump vent line
第4题：
Production of high salinity distillate
Seawater feed temperature below 165℃
A leak in the first stage demister
A cracked distillate pump vent line
第5题：
vaporize, with the un-flashed water remaining at the temperature at which it entered the flash chamber
vaporize, with the un-flashed eater equalizing to the saturation conditions existing in the f lash chamber
vaporize, with the remaining water a t a temperature greater than it entered the flash chamber
boil, allowing steam bubbles to rise through the brine at the bottom of the flash chamber
第6题：
poor distillate quality
reduced evaporator capacity
low brine concentration
improper vacuum regulation
第7题：
lower condensing
higher cooling
lower cooling
higher condensing
第8题：
completely filled with saltwater
filled with de-scaling compound
tightly closed to exclude air
vented to the atmosphere
第9题：
to decrease scale formation
for better cooling effect
for more economical purpose
to raise vacuum
第10题：
loss of second stage vacuum
contamination of the distillate
lower feed inlet temperature
contamination of the second stage condenser