Seawater cooling tower

Industrial Wastes. Closely related to seawater concentration is the simultaneous concentration of industrial effluents and recycle of recovered water (see Wastes, industrial). These appHcations are expected to increase as environmental restrictions increase. Examples are the concentration of blowdown from cooling towers in power plants concentration of reverse osmosis blowdown and the processing of metal treatment wastes (11) (see... 

Natural and forced-draft cooling towers are generally used to provide the cooling water required on a site, unless water can be drawn from a convenient river or lake in sufficient quantity. Seawater or brackish water can be used at coastal sites, but if used directly will necessitate more expensive materials of construction for heat exchangers. 

Cooling water Supply at 80-90°F from cooling tower, return at 115-125°F return seawater at 110°F, return tempered water or steam condensate above 125°F. 

An integrated water-treatment system designed to use different water sources and different treatment processes, including membrane processes, has been realized in Temeuzen (The Netherlands) [15]. Raw-water sources and treatments include seawater and integrated membrane system to produce demineralized water fresh water, and ion exchange to produce demineralized water effluent industrial wastewater-treatment plant (WWTP) and media filtration to produce cooling tower supply water. 

Some pilot plants are studying the feasibility of RO for demineralization of seawater and brackish water (Table 9.5), but the cost is very high. In seawater demineralization, i of the entire cost is put towards replacement of the membranes. Other applications are pretreatment of normal municipal water preceding ion exchange to make ultrapure water for applications such as boiler feed recovery of valuable or reusable materials from a waste via the RO reject stream and reduction in the volume of waste, if required and water conservation or recovery such as the cooling tower blowdown. 

It is supplied with water mainly from the Provence canal for boiler and cooling tower make up- Seawater is used for the fire-fighting network and water from the Arc river for the industrial water network. 

The GT-MHR is well suited for the desalination of seawater in a cogeneration mode. By transferring the higher temperature energy from the precooler and intercooler (Fig. XV-2) to the desalination system (e g. multi-effect distillation), and the lower temperature energy to the site heat sink (e g. cooling tower), the desalination system will have no impact on plant thermal efficiency. 

Cooling water required on site often is stored in towers storage tank problems or piping and valve malfunctions could cause loss of this component. If seawater is used, materials of construction must be more resistant to salt. Loss of steam purchased or generated in water tube boilers could result from boiler lube failure, turbine failure, or piping or valve malfunction. 

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