Patent DE-102009031246-A1 (DE)
Title: System for the desalination of seawater, comprises an evaporation body, a first line system, which guides salt-containing raw water to the evaporation body, a heater arranged to the evaporation body, and a second line system
Inventor: SZYNALSKI PETER
IPC: C02F1/06
Filed: 2009-07-01
Abstract: The desalination system comprises an evaporation body (V), a first line system, which guides salt-containing raw water to the evaporation body, and a heater arranged to the evaporation body, where the remaining raw water is again guided to the evaporation body after its passing, so that the raw water is successively evaporated, where the steam is condensed in a condenser (K) for pure water. The desalination system further comprises a second line system discharging the pure water from a pure water chamber arranged to the condenser, and an arrangement of first heat exchangers (WH). The desalination system comprises an evaporation body (V), a first line system, which guides salt-containing raw water to the evaporation body, and a heater arranged to the evaporation body, where the remaining raw water is again guided to the evaporation body after its passing, so that the raw water is successively evaporated, where the steam is condensed in a condenser (K) for pure water. The desalination system further comprises a second line system discharging the pure water from a pure water chamber arranged to the condenser, an arrangement of first heat exchangers (WH) coupled into a supply line of the raw water to the evaporation body, and an arrangement of second heat exchangers (WK) in connection with the condenser and a heating pump or coupled into a condensation area with a heating pump, which is connected with the heat exchangers. The evaporation body is impacted with a low pressure and/or contains heater. The arrangement of the second heat exchangers is arranged in the area of the condensation of steam to pure water. The second line system is arranged to the evaporation body. The heating pump is coupled to the second heat exchangers in the area of the condensation of steam to pure water with the first heat exchangers in the area of the supply of unheated or partially-heated raw water. The second heat exchanger in the area of the condensation of steam to pure water is coupled with a device for evaporating the raw water, and forms a building unit with the evaporation body for the evaporation of the raw water. The second heat exchanger is formed as a component of the building unit made of evaporation body and the condenser, is coupled with the heating pump, and is formed as an evaporator of the heating pump. The building unit is formed as desalination reactor. A building element used as condenser engages in a circular outer area and a building element used as evaporator engages in a cylindrical inner area like as an evaporation chamber in the desalination reactor. The supply line of the raw water and a discharge line for the partially evaporated raw water flow into the evaporation chamber. The building element used as condenser is formed as tubular bundle heat exchanger, which flows into a low pressure chamber on end side to the steam side and into a pure water chamber on end side to the condensate side. A heating line of suppressed or limited building elements is inserted between the condenser in the outer area and the evaporator in the inner area of the desalination reactor. The heat exchanger in the area of the supply of the heated raw water is coupled with a heat generator. The heating pump is operated by an electrical energy. A high-efficient tubular bundle heat exchanger is used as the first heat exchanger with a medium transferring heat. Several desalination reactors are switched as cascade, where the pure water is removed from the condenser of the desalination reactors at the end of one cascade and is supplied to the same side of the cascade to the evaporator of the desalination reactors, so that the flow direction of the pure water is oppositely directed to the flow direction of the raw water in the cascade of the desalination reactors. The heating pump of the heat exchanger in the area of the removal of the still hot pure water at the end of one cascade of the desalination reactors is coupled with the heat exchangers in the area of the supply of raw water to the cascade of the desalination reactors. The heating pump is provided for a cascade zone of the desalination reactor. The heating pump of the heat exchanger in the area of the removal of the still hot pure water is coupled with the heat exchangers in the area of the supply of unheated or partially-heated raw water of the same cascade zone.