MARINE & OFFSHORE
The desalination method of fresh water generator allows you to enjoy the low-cost advantage of seawater and stay away from expensive and low-quality fresh water.
The freshwater generator
The freshwater generator has an optimized process that uses just half the seawater of other freshwater generators. This minimizes pipework and allows the installation of smaller seawater pumps, which reduces both installation costs and energy consumption. The process is based on unique 3-in-1 plate technology, which enables desalination in a single plate pack with one type of titanium plate. This technology is combined with a wide range of enhancements for easier installation and simpler operation. Since the plate pack contains the process vacuum, so has no outer shell and is smaller than other freshwater generators. Its construction is robust, with duplex piping and titanium plates that resist corrosion and erosion. Little maintenance is required, and the plate pack slides open for easy access to the interior without an additional service area.
Application
uses vacuum distillation to convert seawater into high-quality fresh water for domestic and process utilization. By providing a constant supply of low-salinity water and continuously controlling the water quality, it eliminates the need for bunker water. Freshwater generator is designed for start-and-forget operation in periodically unmanned engine rooms and other automated operations. It is suitable for installation on ships and rigs, as well as in remote onshore locations.
Jacket water, hot water, steam injection or a Hot Water Loop can all be used as heating media.
Features and benefits
• Half the seawater flow.
Acme fresh water generators require only half of the seawater required by other fresh water generators, which means smaller seawater pumps can be used.
• Lower energy consumption and emissions.
The reduction in seawater pumping needs has a corresponding effect on the consumption of electrical energy.Less fuel has to be burned, which reduces both operating costs and CO2 emissions.
• 3-in-1 plate technology.
Incorporates the evaporation,separation and condensation processesinto a single type of titanium plate.Desalination is handled within a singleplate pack that also contains theprocess vacuum. No outer shell is necessary.
• Simple, compact installation.
With no outer shell and no additionalservice area. Assembly can be handled on site and installation is simplified by the ability to use smaller seawater pumps and pipes，It can be installed in any direction.
• Easy operation and maintenance.
Optimized flow distribution across the plates prevents dry spots and keeps scaling to a minimum. Maintenance intervals are
long and the plate pack slides open for easy access to the interior.
• Low-salinity water.
Regulation of the seawater flow optimizes the performance, ensuring high-quality fresh water with a maximum salinity of 2 ppm. The fresh water has a lower content of dissolved solids than water supplied by other freshwater generators and can be used directly by the steam boilers.
Operating principle
Feed water enters the lower (evaporator) section of the plate pack, in which the plates are warmed by the heating medium. Here the water is evaporated at around 40-60°C in a vacuum of 85-95%, which is maintained by the brine/air ejector.
The vapour produced rises between the plates into the middle (separator) section of the plate pack, where any droplets of entrained seawater are removed. Gravity causes these droplets to fall back into the brine sump at the bottom of the freshwater generator.
Only clean freshwater vapour reaches the top (condenser) section of the plate pack, which is cooled by a flow of seawater. Here the vapour is condensed into fresh water, which is pumped out of the freshwater generator by the freshwater pump.
Installation
Easily installed on ships and rigs, as well as in remote onshore locations. Since there is no need for an extra service area, the installation is highly compact.
The heating medium is either hot water, such as jacket water from the engine, or a closed circuit heated by steam.
An ejector pump supplies seawater coolant for the condenser, feed water for evaporation and drive water for the combined brine/air ejector. This pump is separately installed and connected to its own seawater intake.
An ejector pump supplies seawater coolant for the condenser, feed water for evaporation and drive water for the combined brine/air ejector. This pump is separately installed and connected to its own seawater intake.
The fresh water produced is pumped into the storage tank by a built-in freshwater pump.
A control panel, which incorporates motor starters and a salinometer, supplies electrical power to the ejector pump and freshwater pump, as well as control voltage to the salinometer and dump valve.
