Technology for desalination of sea or brakish water
Posted by Midnyt Blaze on 22:24 with No comments
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| Desalination of sea or brakish water |
The MES Desalination Plant has been designed to solve most economically energy and drinking water problems in countries with arid zones by using solar energy. MES Plants are able to produce drinking water and water for irrigation with a daily fresh water production between 45 m³/d and 100.000 m³/d. The Plant consists of the following main elements
Hot Water Storage (HWS)
The key technology of a MES Plant for collecting and storing solar energy lies in the Hot Water Storage (HWS). The hot water storage consists of basins filled with seawater, brackish water or effluent water with high salt concentration from oil fields. The ground of each basin is covered with a layer of plastic sheet. On top of the water surface swims the Transparent Heat Insulation Cover (TWD) safely fixed against storms. The solar radiation shines through the TWD and heats up the water inside the HWS. After initial filling, the heating up to the design temperature of 50°C to 70°C may take between two and six weeks depending on its depth and the intensity of the solar radiation.
The key technology of a MES Plant for collecting and storing solar energy lies in the Hot Water Storage (HWS). The hot water storage consists of basins filled with seawater, brackish water or effluent water with high salt concentration from oil fields. The ground of each basin is covered with a layer of plastic sheet. On top of the water surface swims the Transparent Heat Insulation Cover (TWD) safely fixed against storms. The solar radiation shines through the TWD and heats up the water inside the HWS. After initial filling, the heating up to the design temperature of 50°C to 70°C may take between two and six weeks depending on its depth and the intensity of the solar radiation.
Evaporator & Condenser
The hot water enters the evaporator where a certain part of the water flow is transferred to steam that is absorbed by the circulated air, while the rest of the hot water flow cools down and is pumped back to the HWS. The water is sprayed downward, while the air flow is upward in counter flow. The saturated air is leaving the evaporator, before entering the condenser. The steam contained in the humid air is converted in the condenser into distillate. The concentrated brine inside the HWS can either pumped back or disposed and converted to salt.
The hot water enters the evaporator where a certain part of the water flow is transferred to steam that is absorbed by the circulated air, while the rest of the hot water flow cools down and is pumped back to the HWS. The water is sprayed downward, while the air flow is upward in counter flow. The saturated air is leaving the evaporator, before entering the condenser. The steam contained in the humid air is converted in the condenser into distillate. The concentrated brine inside the HWS can either pumped back or disposed and converted to salt.
Air circulation system
The transport of humid air is provided by fans, which maintain a closed circulation system.
Cooling water system
The cooling water system provides the condenser with the necessary cooling for the production of sufficient condensate. In case of coastal or offshore locations the cooling water is provided from the sea. In case of desert locations, a forced draft evaporation cooling process will be used.
Drinking water treatment
Drinking Water Treatment In the water treatment plant, disinfection is carried out and minerals may be added to the distillate to produce best drinking water, if not used for irrigation purposes.
The transport of humid air is provided by fans, which maintain a closed circulation system.
Cooling water system
The cooling water system provides the condenser with the necessary cooling for the production of sufficient condensate. In case of coastal or offshore locations the cooling water is provided from the sea. In case of desert locations, a forced draft evaporation cooling process will be used.
Drinking water treatment
Drinking Water Treatment In the water treatment plant, disinfection is carried out and minerals may be added to the distillate to produce best drinking water, if not used for irrigation purposes.
Discharge of high saline water
The discharge of high saline water into the oil fields or to ground water layers will be very much reduced due to its conversion into potable water.
The discharge of high saline water into the oil fields or to ground water layers will be very much reduced due to its conversion into potable water.
Categories: Chemical Process Technology
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