Water Softening Plant

Description

WATER SOFTENERS A. INTRODUCTION For controlling raw water hardness, to make water soft and free from non-soluble salts of Calcium and Magnesium, water softening plants are recommended. Raw water which contains carbonates of Calcium and Magnesium form hard scaling inside the surfaces of boilers, cooling towers, heat exchangers, air-conditioning plants. The scale which is removed by chemical descaling recirculation system, though removed but affect the weakness of piping of boiler tubes and mild steel bodies. With the use of water softening system, the scaling problem either controlled completely or form a very thin soft layer which can easily be removed by high pressure washing or with a very diluted descaling solutions. The use of softener also increase the efficiency of main plant by reducing fuel or power consumptions. The water softening plant work on Ion Exchange Principal where strong acid cation exchange resin is used as softening media. This resin release sodium salts which being soluble does not affect the pipeline or vessel through as no scaling is formed due to soft water. This resin require recharging when exhausted due to absorbency of excess Ions of Calcium & Magnesium. The charging chemical used in softener is Sodium Chloride which is very cheap and easily available. The Water Softener consist of M.S. pressure vessel provided with bed plates on to which strainers are fitted either on both side or at the bottom depending of system like up-flow or down-flow working of unit. Cation exchange resin is filled directly on strainer plate. The softener is provided with frontal pipe work and valves for various operations. Also provided with M.S. rubber lined / FRP/HDPE brine tank to store sufficient quantity of brine solution required for recharging of resin. All the softeners are provided with automatic injection of brine solution from brine tank to softener through C.I. Ejector or non-corrosive pump for feeding the solution. UNDER DRAIN SYSTEM Our Water Softeners are consists of a steel pressure vessel or Composite Plastic . Internally they are fitted with a water collecting system and a distribution system for brine and raw water. The Ion Exchange Resin Bed is supported on a steel bed plate on to which screwed polypropylene strainers are tighten to prevent loss of resin and to ensure even collection of treated water. FRONTAL PIPE WORK & VALVES All softeners are provided with interconnecting face piping in M.S. comprising of inlet, outlet and back wash lines complete with valves and regeneration arrangement for auto injection of brine solution from brine preparation tank through power ejector & valve. The waste effluents are directed to a drain sump for which a pipe to drain should be connected. ION EXCHANGE RESIN The under bed material for the water softener consists of one layer of strong acid cation exchange resin. In normal practice only Ion Exchange make INDION – 220 / 225 Na form or Thermax make T-40 / 42 Na form are supplied with plant. There are other reputed manufacturers of resin like Purolite & Lexuss and can be supplied on demand by customer. ACCESSORIES i) PE / FRP / M.S. Rubber lined Brine Preparation Tank. ii) C.I. / M.S. Rubber Lined Ejector with PVC Suction line. iii) Air release valve with connecting piping. iv) 100 mm dia. bourdon type stainless steel pressure gauges with stainless steel isolation valve on inlet line of water softener. v) Sampling cocks on soft water outlet line. vi) Hardness Test Kit. For more detail, Kindly contact us through our E-Mail : ENVIROTEKMAIL@GMAIL.COM