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Mineral water plant

Karachi, Pakistan
  • Ad Id
  • Ad Posted
    8 May 2013
  • Business & Industrial Type
    Electrical Equipment
  • Seller Type
    A Professional / Business
CHLORINE DOSING SYSTEM: (CL2 ) Raw water may contain living micro-organisms and organics which are objectionable to R.O. Membrane as it may cause fouling to deteriorate the performance. Even water may contains ferrous which can be oxidized to ferric oxide which is settle down in storage tank. We have offered a Hypo chlorite dosing system for this purpose. About 3-4 ppm of sodium hypo chlorite solution is dosed in raw water storage tank. This reacts with water to form a hypo chlorite acid which acts as disinfecting agent. For this purpose one no. of HDPE hypo chlorite solution preparation tank along with One nos. of dosing pumps are provided. Required suction / discharge pipe work in pvc construction is provided with isolation valves. Dosage rate is adjusted as per the actual requirement, which may very on case to case basis. RAW WATER STORAGE TANK : (RWST) One No. of Raw water is required in for storage of chlorinated water having appropriate capacity. The tank is fitted with PVC pipe work & isolation valves and suitable type of level indicator. RAW WATER SUPPLY PUMP: (RWP) A Horizontal Centrifugal type of pump in Stainless Steel construction has been provided for supplying Raw Water to Pressure Sand Filter Unit. Necessary Suction / discharge pipe work in s.s construction with isolation valves are also provided up to PSF Unit. PRESSURE SAND FILTER: (PSF) Raw Water is first filtered by filtration unit in series prior feeding R.O.Plant. pressure Sand Filter Unit is provided for removal of suspended matters & turbidity from raw water. PSF Unit is a SS vertical Pressure Vessel. Internally, it is fitted with bottom collecting system. A uniform grades silica quartz sand is charged on the supporting media of pebbles and gravels. This unit is fitted with SS frontal pipe work and Multiport Valve externally. During service cycle water is passed in down ward direction through sand bed, thus entrapping suspended matter & turbid particles. Over a period of time, sand bed gets chocked due to suspended matters resulting higher pressure drop and lesser floe. At this stage filter bed need to be backwashed. When pressure drop across the sand bed increases beyond the specified limit (0.5 kg/cm^2) or quality of filtered water determinates, which ever is earlier. Regeneration involves backwash & rinsing of Sand Bed as below. For backwashing service water is passed in reverse direction of service cycle to loosen the filtering media bed. Due to this, entrapped suspended matters get free and comes out along with effluent water. Backwashing is continued for about 10- 15 minutes or till the effluent coming out is clear. For Rinsing of Sand Bed : Service water is passed in down ward direction to settle down the sand bed. The effluent water is drained for about 5 minutes time to ensure all unclear water is drained down. ACTIVATED CARBON FILTER: (ACF) Natural water may contain Colour, Odour, Chlorine & Organics in different proportion, which is undesirable for potable application, and hence, it is necessary to remove the same from water. If raw water is chlorinated for die-infection, it is necessary to remove the free Chlorine feeding to R.O System. Chlorine being a strong oxidizing agent, it damages R.O.Membranes. Activated Carbon can remove Chlorine, Odour, & Colour while passing the water through carbon bed along with Odour & colour. This Carbon granules having larger surface area and specific property to absorb organics. ACF Unit is a FRP vertical pressure vessel. Internally it is fitted with strainer on bottom collecting system. The unit is fitted with SS frontal pipe work & MPV externally. A granular activated carbon is charged on the supporting media of Coarse & Fine Silex. During service cycle water is passed in down ward direction through Carbon Bed, which removes Chlorine & Odour from water. When pressure drop across the Carbon Bed increased beyond the specified limit of (0.8 kg/cm^2) or quality of filter water deteriorates, whichever is earlier the unit is isolated for regeneration. The regeneration involViews: 1261