METHOD AND DEVICE FOR CONCENTRATING ALUMINATE SOLUTIONS Russian patent published in 2005 - IPC

FIELD: separating materials by evaporation.

SUBSTANCE: method comprises evaporating in several stages. In the preliminary stage, the aluminate solution is evaporated by the secondary steam supplied from the final stage and heated up to 20-60^oC before supplying to the intermediate stage. In the intermediate stage, the solution is evaporated by live steam. Before supplying to the final stage, the solution is mixed with the circulating solution and is evaporated by the secondary steam supplied from the intermediated stage. The device comprises evaporating apparatus with vertical heat exchanging pipes. The end stage is connected with pipelines for supply of initial aluminate solution and secondary steam from the second housing and pipe line for discharging evaporated solution which is connected with the first housing and provided with a heater. The first housing is in communication with the second housing provided with circulation circuit and chamber for boiling of solution arranged above the heat exchanging pipes. The first housing is provided with circulation pipe and external chamber for boiling of solution.

EFFECT: enhanced efficiency.

2 cl, 2 dwg, 2 ex