Commissioning chlorine system

Equipment should first be inspected for compliance with specifications. This action includes checks of dimensions, internals, materials of construction, the quality of welds, and the installation of instruments and process connections. Before commissioning the liquid chlorine system, it is also necessary to have all relevant safety systems in operating order, operators trained, and operating manuals and instructions ready. 

When coolers or condensers are shut-down but remain full of water, the amount of current required to maintain satisfactory cathodic protection is considerably reduced. If the current is not reduced over-protection occurs and excessive amounts of chlorine can be generated which would tend to accumulate in the upper section of the water boxes causing considerable corrosion, not only to the water boxes, but also possibly to the tubes. To ensure against this a stand-by condition should be included on the control panel which effectively reduces the current required under shut-down conditions. This control is effected by a limit switch fitted to the outlet valve of the condenser or cooler concerned. It is impossible to determine exact requirements for the protection of circulating water systems in advance and it is normal to adjust the current to provide protection during commissioning. 

The Walkerton Public Utilities Commission (WPUC) operated the Walkerton water system. Stan Koebel was the WPUC s general manager and his brother Frank its foreman. In May 2000, the water system was supplied by three groundwater sources Wells 5, 6, and 7. The water pumped from each well was treated with chlorine before entering the distribution system. 

Volume IV covers support systems and commissioning. Chapter 10 discusses some chemical engineering principles required for design of a chlorine plant, and examples are provided explaining how these fundamental concepts are translated into practice. Instra-mentation and control systems required for the various unit operations are addressed in Chapter 11 and the utilities needed for mnning the plant are presented in Chapter 12. Details pertinent to plant commissioning and operation are treated in Chapter 13. 

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 ... 

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. 

Chlorin one of the basic ring structures of the porphyrins. Using the numbering system of the Commission of Nomendature of Biological Chemistry, 1960 (see Porphyrins), C. is 17,18-dihydroporphyrin. With the introduction of the term porphyrin, terms in the original Fischer nomenclature, such as C, por-phin, phorbin, bacteriochlorin, etc., are now superfluous. 

Commercial chlorine is transported as a liquid, either in small containers (cylinders and drums) or in bulk (road and rail tankers, barges, and ISO containers). The design, construction, system of labeling, inspection, and commissioning are covered by national and international regulations [228]. Cylinders have a chlorine content up to 70 kg. A protective hood is provided to cover the valve during transport. The ton containers (drums) have a capacity of 500 - 3000 kg of chlorine. Drums are equipped with two valves near the center of one end and connected with internal eductor pipes. 

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