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WET
SCRUBBER
(Application)
The high cane preparatory index and draught used in Boiler installation lead to
a high proportion of un-burnt solid particles in the gases,
which (LEGAL RESTRICTION) needs to be separated
to reduce the solid loads to ambient. The maximum efficiency of separation is
achieved by installing a Wet Scrubber in the line.
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(Special Features)
1.
The
design is suitable for inflammable and explosive products.
2.
Particulate removal and absorption at the same time.
3.
Gas
cooling.
4.
The
inlet and outlet of the flue gases are from the top of the scrubber, which
avoids any water passage to ducting or air heater.
5.
Draught loss is less than 60 mm WC.
6.
There is no power driven running part.
7.
The flue gas going to chimney is almost colourless and with particulate
less than 150 mg / NM3.
8.
The system consists of instrumentation for temperature control of outlet gases
which save the I.D. Fan. The outlet gas temperature shall be around
95 ± 5 deg. C.
Installation may be done before or after ID Fan.
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FLY ASH HANDLING SYSTEM
(Application)
This is unique system design developed to process the slurry obtained from
Wet Scrubber in continuous stream in which the clear water phase is
recycled to wet scrubber and underflow (settled Ash) is discharged
continuously to a standing trolley. |
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(Special Features)
1. Clear liquid obtained may be recycled to Wet Scrubber after making it
free from suspended solids. Makeup water is taken from other sources e.g.
B-grade condensate drain, blow down etc.
2.
The settled particles are dewatered to the maximum possible extent and
are discharged at one point in the trolley. This helps easy and continuous
handling of ash after treatment.
3. The System consumes minimum H.P. ( 3 – 5 H.P. )
4. Minimum space and no man power is needed.
5.
Pumping of slurry may be avoided if the layout of the boiler house
permits the installation of the system near wet scrubber.
6. No other civil construction or dry beds are required.
The Ash Handling System may be installed by the side of wet scrubber where wet
scrubber discharge slurry directly to Rectangular Solid separator under gravity.
The total retention liquid in Rectangular Separator and vertical clarifier is 25
- 30 minutes.
(Scope of Supply)
A. Horizontal Rectangular
Solids Liquid Separator :
The Rake
type rectangular clarifier has minimum retention time required for maximum
settling rate with laminar flow of liquid. The discharge of underflow and scum
take place at opposite ends with the help of Rake Carrier and skimmer.
 
B. Vertical Clarifier :
The scum and supernatant
liquid obtained from the horizontal separator is further clarified in a vertical
clarifier with no moving / rotating parts. The clear liquid is drawn through
telescopic valve and recycled to wet scrubber. The settled particles are
discharged to the rake Carrier of the horizontal separator.
 
View of
Assmbled Wet Scrubber & Ash Handling System |
