Main-vice Desulphurization Wet Scrubber is made of carbon steel and
lined with granite. Several modules are separated and assembled at
site. (Or made as a whole steel-made tower and lined with granite.)
The gas after dedusting enters into the desulphurization tower, and
the SO2 containing in the flue gas is purified due to
neutralization reaction. The vice tower has the function of
dehydration in order to protect the ID fan, flue and chimney that
connected after the vice tower.
Principle of Operation
Desulphurization spray layer is based on the upper part of the
tower, the absorption tower slurry circulating pump corresponding
to each spray layer. The nozzle configuration of spray layer is
simulated designed by professional software in order to ensure good
contact with alkali and acid reverse gas reaction; and finally
reach purification effects. Demister installs in the upper
desulphurization tower, a total of two levels. The net is used to
separate the entrainment of flue gas cloud droplets, and droplet
concentration in flue gas export from mist eliminator is less than
75 mg/Nm3 (dry basis). At the same time, the equipment also has
spray washing device to the tiny dust particles adhesion and
desulphurization of flue gas crystallization on the demister system
1. Firstly, please turn on pump, turn off the door of induced fan,
reduce current. Then, open the door of the fan when the fan
operates normally. At last, when there is water overflowing at the
outlet of water spray tower, please turn on the induced fan.
2. When operating, please observe the operation of water supply
system and ensure water supply even and normal.
3. When operating, it is not allowed that there is no water in
cylinder. Please check whether the outlet of ash water is smooth
regularly and observe the temperature of flue gas and resistance of
4. When operating, PH value of water in tank should be tested
regularly, when PH value is less than 7, alkali matter should be
added to ensure the PH value of circulating water.
5. According to the amount of ash, mist eliminator backwash pump
does not need to operate for a long time, it should be controlled
6. Water level in processing water tank should be normal before
turning on backwash pump. Water level in circulating water tank
should be normal before turning on circulating water pump as well.
If the water level cannot achieve the requirement, please start
clarified water pump so that water in processing tank can flow into
circulating tank, as a result, water level in processing water tank
is of importance.
7. When turn off device, please turn off induced fan firstly and
then water pump.
8. If the device has been rested for a long time, there is
necessary to drain water in water pipe and tower and clean up the
ash in multi cyclone dust collector.
Points for Attention
|Points for Attention|
Please clean up settling tank regularly. Ash deposition will cause
the incomplete precipitation of dust and desulfurization products.
If impurity content of water which flows into clean water tank is
too high, it will block pump and spray device so that
desulfurization effect will be influenced.
Feed water flow control: Adjust water flow supply and control the
water supply in allowed range. Do not bring liquid water into
induced fan and chimney.
Boiler room operators should seriously record following information
in time: the amount of alkali, PH value of water in tank, water
addition, PH value of ash water and cleaning dust situation of
Check whether the pump, fan and electric motor are heating, whether
there is abnormal noise and whether there is seepage water of pump.
Check whether desulfurization products generate crystallizing, if
crystallizing has been generated; please change circulating water
in tank in case of clogging nozzle and affecting desulfurization
Circulating water should be changed when blow is out in case that
there is no water but burning.
Equipment failure: Firstly, please find the causes of the
malfunction, if the problem can be solved individually, actions
should be taken immediately, if the individual can not solve the
problem, please inform the responsible officer and boiler operators
as soon as possible. When stopping running the equipment for
repair, the fan should be firstly turned off, and then the pump.