Decommissioning; Safety Instructions; Shutting Down The System - ABB ProKiln GAC400 Operating Instruction

124 ProKiln GAC400 PROBE GAS SAMPLING SYSTEM | OI/GAC400-EN REV. A

12 Decommissioning

Safety instructions

Take into consideration the following safety instructions for all
actions related to disassembling:
WARNING
Mechanical, thermal and material dangers
Risk of injury in the area of the probe gas sampling system
due to moving or falling parts, anti-freeze, lubricating oil.
• Wear general personal protective equipment:
• Closed overalls with long trousers and long sleeves
• Safety shoes (preferably boots covering ankles)
• Safety gloves suitable for mechanical work Safety glasses
• Protective helmet
• If necessary, additional protective equipment if prescribed
by the operator.
WARNING
Hot surfaces
Danger of burning due to hot surfaces during and after
operation of the probe gas sampling system.
• Do not touch the probe gas sampling system during and
after operation.
• Do not touch the probe gas sampling system until it has
cooled down to 50 °C. Specifically, do not touch:
– the cooling module, the heated sample gas line
– the connection box for the heated sample gas line on
the retractor
– the hot sampling filter
– the entire probe
– the metal structure of the retractor
– the shutter of the duct opening
• If it is unavoidable to touch hot components, wear a face
mask against heat, heat-proof gloves and protective
welder's clothing.
CAUTION
Harmful anti-freeze
Danger of injury to skin and eyes in the event of contact with
cooling water or anti-freeze.
• Avoid contact with the cooling water and the anti-freeze.
• In case of accidental contact of cooling water or anti-
freeze with skin, wash off the skin immediately with water
and soap. Contact medical specialist according to local
regulations.
• If cooling water or anti-freeze gets in the eyes despite
protective glasses, rinse them thoroughly under running
water, holding the eyelids open. Contact medical specialist
according to local regulations.
• Observe instructions in the anti-freeze manufacturer's
safety data sheet.

Shutting down the system

Introduction
These instructions describe how to shut down the gas sampling
probe. Note that the cooling water should only be drained if the
system is shut down for prolonged periods of time or if it is
subsequently disassembled. Otherwise, the cooling water can
stay in the system.
Requirements
The following conditions must be met:
• The system is switched off at the main switch.
• Central compressed-air supply shut off, gate valve in
pneumatic box closed (compressed-air tubes are vented by
releasing a manual filter blow back with probe inserted, and
gate valve closed).
• Rotary kiln is shut down.
• The system has cooled down
Instructions: Shutting down
Perform the following steps to shut down the system:
1. Secure the closed shutter on the duct flange with a padlock.
2. Flush heated sample gas line and sample gas probe with dry,
dust-free and oil-free instrument air (flow rate approximately
100 l/h) for approximately 15 minutes. This is to ensure that
no condensing, harmful or corrosive gases remain
accumulated inside the system.
3. Unscrew heated sample gas line screw connection on the
analyser cabinet and on the gas sampling probe (both ends
of the heated line).
4. Clean any residue and incrustations off the probe tip filter
and probe tube.
Note: Only clean mechanically. Do not use chemicals
(particularly acids and lye) for cleaning.