COMBO UNIT - CONSISTS OF CHLORINATOR + EVAPORATOR + GAS CONTROLS

• Incorporates all essential functional & safety items with interlocks

• It provides total system responsibility & scope
• As standard models – Early delivery
• Compact & Occupies very less floor space
• Working & standby unit can be placed adjacent in series
• All terminals are ready for hook up at site.
• Skid and supports are steel with fibre glass covering to resist corrosive environment
• Power input terminals (3 Phase & 1 Phase) are provided.
• Piping input & Outputs are provided with counter flanges/Couplers.

PRINCIPLE OF WORKING  OF COMBO UNIT - consisting of Chlorinator & Evaporator

• Liquid chlorine supply  from the manifold of tonners to the unit by a 20 NB  pipe.   The liquid chlorine enters into the vaporizing chamber at the bottom.
  

• The water bath  chamber is heated by electric immersion heater to maintain   temperature of  water bath at 80 deg.C.  The Temperature control switch is interlocked with heater for temperature control.
  
• Low temperature switch  set at 65 deg.C is interlocked to the ASV (auto shut off valve) to prevent liquid chlorine flooding the gas line. The High temperature switch  provides alarm and cuts off the heaters.   
  
• Level switch controller maintains constant minimum level in the water bath chamber interlocked with solenoid valve on make up water line.
  
• The expansion chamber and liquid chlorine line with a rupture disc and pressure switch assembly protects the line  from rupture due to the thermal expansion of locked liquid chlorine in the pipeline.  The pressure switch provides alarm.  
  
• Local control panel  of vapourizer provides required interlocks indicating lamp and  annunciation for high & low temperature of water bath, low level in water bath & high pressure in liquid line.
  
• The pressure relief valve is provided as safety valve. The filter  is provided to eradicate solid impurities.  Pressure regulating valve reduces the chlorine gas pressure from 8 Kg/sq.cm normal inlet pressure to 2.5 Kg/sq.cm. on the downstream of PRV  
  
• The chlorinator part - Vacuum regulator  is normally closed and opens only in case of sufficient vacuum  present.   The vacuum in chlorinator is created by a motive water supply operated injector.   The vacuum from the injector extends through the vacuum line up to the vacuum regulator.  The flow meter of chlorinator is calibrated in Kg/hr. of chlorine.  
  
• The flow control valve on the chlorinator is for manual setting of required flow in the chlorinator.   The Differential pressure regulator maintains a constant differential pressure across the flow control  valve.   The Vacuum relief valve is to maintain maximum vacuum in the system.  If the vacuum exceeds it takes atmospheric air inside for vacuum reduction.
  
• The emergency drain relief valve is  vacuum to close and will open any water accumulation in the line more than 300 mm WC. The check valve prevents water entering.   
  
• The chlorine solution line is taken to the point of application through a diffuser.
  
• The entire combo unit is skid mounted with pre-fabricated pipelines with all interconnecting fittings as shown in the scheme.