Paramount provides world unique Flue Gas Desulfurization (FGD) System (Technology acquired from M/s. ANDERSEN 2000 INC, USA) with a minimum 95% Sulphur Dioxide (SO2) removal. Unique feature worth mentioning is that, the system works equally well on low and high inlet Sulphur Dioxide (SO2) concentrations. Even with large variations in the inlet Suphur Dioxide concentrations to the Flue Gas Desulfurization (FGD) system, the Flue Gas Desulfurization (FGD) produces an almost constant outlet Sulphur Dioxide (SO2) concentrations. This characteristic of our Flue Gas Desulfurization (FGD) system is due to its operation in the "concentrated absorption chemical mode". This Flue Gas Desulfurization (FGD) system differs substantially from the other Flue Gas Desulfurization (FGD) processes.
Flue
Gas Desulfurization (FGD) Unit at Hindustan Copper Ltd
A
Hindustan Copper Ltd. Khetri
The
acting chemical in the Flue Gas Desulfurization (FGD) system is Sodium
Sulfite. The concentration of dissolved solids in this system is
maintained at
a much higher
level than other conventional system enabling our Flue Gas Desulfurization
(FGD) system to have low recirculated liquid flow rate to the Flue
Gas Desulfurization (FGD) system and more
Sulphur Dioxide capturing capacity per unit volume of scrubbing liquid.
This characterises in the reduction of recirculation system.
The Flue Gas Desulfurization (FGD) system also uses unique non plugging
low differential pressure spray type scrubber. Though both horizontal
and vertical
versions are available, the horizontal Flue Gas Desulfurization (FGD)
unit provides the greatest ease of operation and maintenance. The horizontal
Flue Gas Desulfurization (FGD)
unit enables construction and complete assembly of the Flue Gas Desulfurization
(FGD) system before transported to site for smaller systems. This Flue
Gas Desulfurization (FGD) system
can
be transported completely prewired, prepiped and all electrical and
piping
connections duly tested in the factory itself before delivery. The
Flue Gas Desulfurization (FGD) unit has it's own skid as a single piece
ready to be installed on suitable concrete foundation. Various utilities
are
then connected to complete the Flue Gas Desulfurization (FGD) system.
The Flue Gas Desulfurization (FGD) system requires comparitively smaller
ground space.
PACKAGE
FLUE GAS DESULFURIZATION (FGD) UNIT
Another unique feature of our Flue Gas Desulfurization (FGD) system is it always operates in an acidic mode. When NaOH is added to the system as the make up reagent, it converts to Sodium Bisulphite back to Sodium Sulphite, rather than existing in the scrubbing solution as free Sodium Hydroxide. The same is true in case soda ash is used in place of NaOH.
Can be designed to achieve even 1 ppm SO2 at outlet for SO2
recovery units.
Another
common problem in conventional scrubbers is Calcium scaling in the
SO2scrubber. The scaling magnitude is predominant in alkaline
mode of operation as Calcium precipitate as Calcium Carbonate
and Calcium
Sulfate causing severe scale formation in the scrubber. This
Flue Gas Desulfurization (FGD) system operates on acidic mode
of operation and even dramatic variations
in Sulphur Dioxide variation cannot take back the system
to alkaline mode of operation thus Calcium precipitation is practically
avoided
in this design of Flue Gas Desulfurization (FGD) system.
Advantages
of Our Flue Gas Desulfurization (FGD) System
| 1. | Proven design. |
| 2. |
Comprises of maximum no. of scrubbers world wide based on this technology with over 500 installations. |
| 3. |
Horizontal configuration ensures ease of operation & maintenance due to reduced heights. |
| 4. |
Gas comes in contact with fresh scrubbing liquid at every stage (Unlike other counter-current scrubber) which increase scrubbing efficiency because of high mass transfer co-efficient. |
| 5. | No chocking problems due to open-grid design. |
| 6. | Operation at slightly acidic pH ensuring practically no scale formation. |
| 7. |
Very less down time compared to conventional scrubbers thereby reducing maintenance cost. |
| 8. |
Ability to handle high surges of SO2 concentration with less effect on outlet SO2 levels due to operation in concentrated mode. |
| 9. | Can be designed to achieve even 1 ppm SO2 at outlet for CO2 recovery units. |
CONVENTIONAL LIME BASED FLUE GAS DESULFURIZATION (FGD) TECHNOLOGIES LIMITATIONS
 |
Scaling & Choking of Scrubbers |
|
Complex Operations |
|
High Operation & Maintenance Cost |
|
High Down Time of Systems |
|
Excessive Chemical Consumption beyond stoichiometry |
|
Incapability to Handle Shock Loads |
|
Difficult to achieve Very Low Outlet SO2 Concentrations, i.e. up to 1 PPM Level |