BAROMETRIC LEG CHLORINATOR

Barometric Leg Chlorinator
This is the simple form of chlorinator having no moving parts. It works on hydraulic balancing of a gas in small diameter PVC pipes.
Chlorine cylinder or tonner can be connected to the chlorinator assembly as usual by a glass reinforced plastic tube. Chlorinator assembly consists of a 20 mm diameter PVC pipe (Plumbing type) taken to 10 m height from the tonner center and then it is taken down to the floor level. A down take water pipe 25 mm diameter PVC pipe is connected to the gas pipe at floor level. Water pipe is having a constant head of 4 m, which has been ensured by providing a water tank of 100/200 lit capacity. FSL of this tank is maintained by providing water flow continuously preferably through two different sources. Overflow should be continuous and can be directed to P.W. Sump.
Gas and water can be taken to P.W. Channel or to suitable location of dosing in a leading PVC pipeline of 32 mm diameter having a minimum length of 40 m approximately. At the dosing point a reducer of 32 by 20 mm shall be provided to ensure a smooth flow of solution at the dosing point.
Water down take pipe shall have a parallel open ended equal branch off taking from 2 m height from floor level and reaching up to FSL of water in tank. Gas pressure and water balancing can be seen in the transparent pipe.
Upper portion of the branch can be a glass tube or a transparent pipe. For a specific opening of tonner valve a balancing of water is specific and can be calibrated to PPM dosing in PW Sump. The calibration can be suitably marked on the tube, by taking different working trials.
Gas has to enter in the system through a 10 m high pipe. In case of emptying of the tonner suction can be created and water can have an access in the tonner. However, this is avoided, because of the fact that water can not rise in pipe beyond 10 m from the gas water connection point which is at floor level. Hence, the safety is ensured.
Advantage of barometric leg chlorinator:
a) Capital cost is less
b) Functioning is easy
c) No moving parts
d) Works on simple hydraulic principles
e) Repairs are easy and economical
f) Safe in handling
g) Process is easily understandable
Modifications in the system have been done to facilitate better functioning. Alarm has been introduced for checking the level in the water tank. Further a tube scrubber has been introduced to ensure better mixing of gas in water. Very effective tools have been introduced for controlling valves of the tonner.
This system has been successfully used at number of places in Maharashtra and Govt. of Maharashtra has recommended this system to be adopted in municipal water supply.