| 摘要 |
The invention concerns a method of preparing brine from sodium chloride salt containing one or more water-soluble impurities having an aqueous dissolution rate lower than that of sodium chloride, the method comprising the steps of: (a) forming a salt bed in a vessel, the vessel including a grid for supporting the salt bed; (b) wetting at least a portion of the salt bed with a flow of water; (c) forming a brine solution by at least partially dissolving the wetted portion of the salt bed in the water; (d) forming small solid particles in the wetted portion of the salt bed, said small particles containing one or more water-soluble impurities but substantially no sodium chloride; (e) passing the brine and the small solid particles containing soluble impurities through the grid and out of the salt bed; (f) separating the brine from the small solid particles. The invention also concerns a device for making brine by dissolving salt in water, which device comprises a vessel (3) containing a grid support (4), means (2, 23) for supplying solid salt (1), means (32, 42) for supplying water, means (14, 15) for the outflow of brine, and means (g) for removing undissolved salt particles (8) at the bottom of the vessel (3).
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