Design and Specification Bid Package for a 2,500 GPD Eutectic Freezing Pilot Plant.

摘要

A technical specification bid package for a 2500gallon per day (GPD) eutectic freeze pilot plant was prepared. The package includes process and mechanical flow diagrams and plot plan of the pilot plant,as well as general project information and specific design criteria for the plant. The eutectic freezing pilot plant is designed to desalinate a brine feedwater,by producing ice and salt. A brine solution is fed into the freezer tank from which heat removal is accomplished by direct contact evaporation of refrigerant, R-114. Solids,ice and dihydrate salt,and a eutectic solution of brine are produced. A hydrocyclone is used to separate the heavier salt from the ice. Solid salt is removed from the brine solution in a filter. Ice is removed from the brine solution in drain and wash columns. Ice from the top of the wash column is repulped with product water to form a slurry which is fed to the melter/condenser. The ice is melted to form product water and in turn the compressed R-114vapors from the freezing tank are condensed. Because of process inefficiencies and heat leaks into the process,the quantity of ice produced is not sufficient to condense all the refrigerant vapors. Make-up refrigerant is provided with a packaged refrigeration unit.