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Raw Water Distillation

Controlled water inlet, a sufficient return pipe to brine with an integrated heat recovery of waste water are the preconditions for a high service.

 

Principle

• A pump pumps raw water into a pre-reservoir. A float switch is the controller of the pump. For the central supply of each individual system the pre-reservoirs are equipped with float valves.

 

• The control system leads the raw water to the distillation collector 'Flatmodel Rosendahl'. Should the necessity arise, a filter is added to the system. In case the raw water is very polluted the pumping pipe requires a filter as well.

 

• The control system leads radiation free an actual amount of raw water to the distillation reservoir. The desired concentration of the sewage water, or the brine is adjustable. A minimum amount is necessary for proper functioning.

 

• In the distillation reservoir the raw water is led through a soakage filter and is heated with temperatures up to 90°C. About 50-70% is evaporated and will be condensed again. 30-50% remain as sewage water, or brine.

 

• The product is pure water, free of any harmful minerals, salt or germs. The high temperatures establish a permanent state of hygienic conditions. The product pre-heats the supplied raw water with a built-in heat exchanger.

 

• The product can be used now for drinking water, as well as for technical and industrial purposes. It is of exceptional suitability for plant irrigation and supply water for cattle. The salt deficiency reduces the amount of water needed.

 

• Although with a built-in thermal recovery device, the product still remains at a high initial temperature. It has an additional economic advantage in relation to energy and the warm water supply does not require any further water heating systems.

 

• The sewage water can be used for plant irrigation with higher tolerance for salt. When sea water has been distilled, the brine can be used in salt-works. Each cubic metre of salt water can produce 35 kg of salt.

 

 

The flat model is optimized for a maximum water production. Already in the winter were on Cran Canaria more than 5 liter per square meter achieved.

 

Distinctive features on collector´s method of construction

• The innovative development of the isolation casing constitutes a considerable progress. The demands on the material are very high. It requires to be sea water resistant, resistant to chemicals, resistant to temperatures up to 160°C and higher, resistant to vermin, and useful for at least 50 years. The thermal insulation effect or the density of the material is orientated to optimal economic viability. Its performance is of very high importance.

 

• The glass covering is 2,6 mm thick and of normal window glass quality. Here the usage of special glass would not pay for itself. Brief solar energy radiation penetrates the glass and will be transformed into thermal energy on the absorbing soakage sheet. The glass covering is impermeable for long wave thermal radiation - the energy is practically locked in.

 

• The raw water supply is distributed through the jet tube and the wicks in the soakage shield. Here the raw water is heated up to almost 100°C. About 50-70% is evaporated and will be condensed again under the cooler part of the glass covering. The condensation is purest water. All harmful agents and minerals stay in the remaining raw water, those will be flushed out of the collector along with the sewage water.

 

• The condensate runs into collecting channel. It drips from a trickling filter onto a heat exchanger tube where the raw water gets pre heated. The heat exchanger tube is led length sided to the jet tube. Because it is cooler than the surrounding steam the condensation effect is established here as well. The condensate will be led into the lower condensate channel. Before entering the soakage sheet the raw water has nearly heated up itself to the functional temperature of the collector.

 

• With the help of the rain water gutter it is possible to store extra water during rainy times. This particular economical factor depends on the region.

 

If the purity and viscosity of the entry product is too small, the pult model must be used.

 

 

Unlike the flat collector, the podium model is projected for the concentration of substances in liquid. It is used for sea salt production and for concentration of waste water.

 

 

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