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Control of Industrial Major Accident Hazards (CIMAH) Report Page 16
Ranhill SAJ Sdn. Bhd. Revision 01
Part B: Information on the Installation Date Aug 2019

Chlorine gas is under vacuum flows from the vacuum regulator through the
chlorinator to the ejector.
There are two chlorinators per chlorinator system; one as duty and one as standby.
In the chlorinator, the chlorine gas flow is indicated by a flow meter and the feed is
controlled by a manual valve. Each chlorinator has an ejector that is located near the
chlorine application point.

The ejector uses a service water supply to create vacuum to ensure water passes
through the dosing point. This vacuum draws the chlorine gas from the vacuum
regulators to the ejector, where it is mixed with water, producing chlorine solution.
Chlorine solution is delivered to the process via solution diffusers located at the
injection points.

Empty cylinders are also stored inside the Chlorine Room awaiting removal back to
the Chlorine suppliers using lorries.

Two (2) Chlorine cylinder-weighting scales are available. One for each line bank is
provided. The cylinder weighting scale is hydraulic load cell type with a digital gauge.
The load cell is of temperature stable.

Kampung Tengah 2 Water Treatment Plant

Liquid chlorine is withdrawn from the containers, vaporized to gas, reduced to a
vacuum in the vacuum regulator, metered and controlled in the chlorinator, mixed
with service water in the ejector and fed into the process as a solution.

Figure B.3.2b: KT2 WTP Chlorine Bank