The feed-water to be distilled is taken from:the fresh water cooling system.. The ejector pump supplies: Coolant in the form of sea water to the condenser, feed-water for the evaporator
Trang 1The feed-water to be distilled is taken from:
the fresh water cooling system
the sea cooling water inlet of the condenser
the sea cooling water outlet of the condenser.
The evaporation temperature 40 - 50 °C corresponds to a vacuum of:
60 – 70 %
40 – 50 %
90 – 95 %.
The ejector pump supplies:
Coolant in the form of sea water to the condenser, feed-water for the evaporator and water for the combined brine/air ejector.
Water for combined brine/air ejector only
Feed-water for the evaporator only
The vapour generated in the evaporator passes through:
The condenser only
The demister and condenser.
The demister only
The fresh water produced is delivered to a tank by a:
Fresh water ejector
Built-in fresh water pump.
Separately installed fresh water pump
Drops of sea water removed by demister:
Fall due to gravity into the brine sump.
Fall due to gravity into the evaporation section
Are removed by the fresh water pump
The combined brine/air ejector is supplied by:
The fresh water pump
The ejector pump.
The compressed air installation
The combined brine/air ejector creates a vacuum in the system in order to:
Increase the evaporation temperature of the feed-water
Decrease the evaporation temperature of the feed-water.
Decrease the temperature of the feed-water
Having reached the boiling temperature, the feed-water undergoes:
Total evaporation
Partial evaporation.
Trang 2Partial condensation.
In order to obtain the specified flow of hot water it is necessary:
To adjust the by-pass valve until the desired jacked water temperature is reached.
To close the hot water inlet valve
To close the hot water outlet valve
The air valve installed on the upper part of the separation vessel:
Should be open during vacuum creation procedure
Should be open after stopping the plant.
Should remain closed all the time
The hot water inlet and outlet valves should be open:
When there is a minimum of 90% vacuum.
Before starting the ejector pump
When there is a minimum of 30% vacuum
After stopping the plant:
All valves must be closed
All valves must be closed, except the air valve.
All valves must be closed except the overboard valve for combined air/brine ejector
Too low hot water flow, due to incorrectly adjusted by by-pass valve will cause: High boiling temperature
Low boiling temperature and a drop in fresh water production.
Increase of salinity
Too high hot water flow, adjusted by the by-pass, will cause:
An increase of salinity
An increase of vacuum
To low boiling temperature