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
Installation and Precautions
1.When installation, equipment should refer to general assembly
drawing from the bottom to the top sequentially. it can also be
installed according to the number of each section since there are
numbers attached on tower when the equipment is delivered.2.When
the base has been placed to the position, top flange washer should
be covered 1-2cm thick furan resin daub from the second section,
and then the uppers can be lift one by one.3.Installation of
equipment inlet: orientation of inlet should be determined in
advance (ensure the consistency between inlet center of device and
the boiler outlet duct center so as to connect with air duct
4. Please follow the above steps to install successively. After
finishing water tank section, please enter into the device with
ladder or scaffold and clear excess cement of cyclone muff, seam
between internal section and section should be filled.
5. Please pay attention to the position of water feeding so as to
connect the position of spray nozzle and pump.
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.