Commissioning brine system

The laboratory staff also should support the commissioning effort. The demands upon analytical facilities will begin with the first introduction of chemicals to the plant. Laboratory personnel can then begin to become familiar with systems and techniques. The early establishment of routines, particularly on the brine system, is recommended. 

Brine Saturation and Primary Treatment. While other brine systems are being commissioned, batches of primary treatment chemicals can be prepared in accordance with process design requirements and operating instructions. Addition of salt to the dissolver can then start, and brine production begins. Addition of treatment chemicals... 

On completion of brine system commissioning, a full analysis of the feed brine should be made before startup. This analysis should include all impurities covered in the Analytical Manual. 

Before startup of the electrolyzers, the process systems relating to the supply of electrolyzer feed streams (feed brine, caustic, acid, demineralized water) and to the product streams (depleted brine, product caustic, chlorine, hydrogen) must be commissioned and brought up to operational status ... 

After successful commissioning on water, the filters should operate on brine. Once the filters are in operation, the clarity of the filtered brine should be tested. An on-line turbidimeter, if provided, can be used to verify correct operation and quality before placing the system on stream. The filtrate returns to the feed tank during this time. 

Preparation for Cell Room Energization. Electrolyzers are isolated from header systems by blanks or slip plates during commissioning of the brine, caustic, chlorine, and hydrogen systems. Immediately before startup of those systems, all blank plates should be removed, leaving only valves closed where it is appropriate to isolate electrolyzers. There should be a record of all blank plates and slip-plates and their locations. This will help to ensure that all are removed before startup. 

---