WNS Series horizontal Oil-fired (Gas) Boiler
-8-
Na
3
PO
4
·
12H
2
O
2
～
3
3
～
4
Note:
a.
The medicine quantity is calculated according to 100% purity.
b.
If no Na
3
PO
4
·
12H
2
O, can use Na
3
PO
4,
but the quantity should be 1.5 times.
c.
Boiling out for boiler only use Na
3
PO
4,
should add 6kg Na
3
PO
4
inside every 1m
3
water.
2.3 Before adding medicine, keep water level at limit low water level. The chemical medicines
should completely solved in the water prior entering into the boiler, then add into boiler
through feeding water pump, keep it close to high water level while boiling out for boiler.
2.4 At the early time of boiling out, start the burner, burning it at low load, keep the steam
pressure up to 0.35Mpa, the time is about 12hours. At the end time of boiling out, keep boiler
pressure at the 75% working pressure, the time is about 12hours.
2.5 Keep the alkaline of boiler water, analyze the boiler water periodically, if the alkaline is
less than 1.5mol/C, should add medicine. If the alkaline has no change for two times to analyze
sampling boiler water, can finish the boiling out for boiler.
2.6 Drain water under pressure status after finish boiling out for boiler. Wash the water vent
vale that contact with the medicine, keep no plugging for blown down valve.
2.7 After finish above-mentioned process, inlet water and blow down by turns until get
qualified water quality, then stop running boiler, open blown down valve, drain off boiler
water.
2.8 After the boiler become cold, open manhole, hand-hole, wash the inside surface of boiler
with clean water, check it again, if find still exist oil and dirt, should boiling out for boiler
again according to above-mentioned way.
③
Running boiler
3.1 Start and running boiler normally.
3.1.1 Open the air vent valve on the top of boiler or lift the valve core of safety valve.
3.1.2 Start burner, start running boiler unit according to the requirements of operation manual
of control box.
3.1.3 Check the water level gauge, if the water level is too high because of heat expansion, can
drain water through blown valve to the normal water level.
3.1.4 When steam spurt from the air valve, close this valve, make boiler up pressure slowly.
3.1.5 Check the feeding water valve, blow down valve, water level gauge, external connecting
pipeline of drain off valve of water level controller, if they are cold means there are no leakage.
3.1.6 Open the main steam valve step by step and supply steam.
3.1.7 In order to keep normal running and safety for boiler unit, boiler operator should often
observe and see whether the boiler pressure, water level and burning is in normal condition
during run boiler.
3.1.8 If boiler unit happens to failure, should stop running immediately and check it. Only after
remove all failures then can re-start boiler.
3.2 Stop running boiler
3.2.1 Push the button of
“
burning stop
”
, boiler stop burning, make all control switch to the
position of
“
stop
”
.
3.2.2 Cut off power switch on the control box.
3.2.3 Close all the relevant inlet & outlet valves of water pump, oil pump.
3.2.4 Close steam valve.
3.3 Adjustment for the quantity of wind and air
3.3.1 The axis of the air damper at burner air suction side is connected through one piece of rod,
so as to make air damper run at the same direction and step driven by servo-motor. The span of
air damper is adjusted through servo-motor.
3.3.2 The span of gas butterfly valve should be same step with air damper, its micro-adjustment
