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Lechler Ltd
1 Fell Street, Newhall
Sheffield, S9 2TP, England
Tel: +44(0)114 249 2020
info@lechler.com
You are here:  |   |  Flue-gas Desulphurisation

Flue-gas Desulphurisation

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Limestone Scrubber

The most commonly used method of flue gas desulphurization is the spray scrubber using limestone as the neutralising agent. Nozzles create the reaction surface. Sulphur in the flue gas reacts with the lime (Sulfite-Sulfate precipitates with calcium as gypsum). The reaction product gypsum (the primary ingredient of plasterboard is eliminated. A number of FGD systems produce plasterboard-grade by-product.

 

 

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Salt water

Due to its natural alkalinity, salt water (sea water) is suitable for wet flue gas desulphurization. Nozzles are the core product for the flue gas and salt water mass transfer. Dissolved sulphate is produced, of the type that is also found as a natural component of salt water.

 

 

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Wellmann Lord process

Is a regenerable process to remove sulphur dioxide without creating a throaway sludge product. Sulphur dioxide from the flue gas reacts with sodium sulphite to produce sodium hydrogen sulphite. Elemental sulphur can be obtained after further treatment.Nozzles are important to the mass transfer of flue gas and washing solution. In the quench and in the washing tower.

 

 

 

 Further applications in power stations

Desuperheater Spray attemperators

Inlet duct washing

Inlet duct washing
Einspritzkühler
Flachstrahl-Düsenstock
Flachstrahl-Düsenstock
Axial-full cone
Flat-jet nozzle
Flat-jet nozzle

 

Inlet duct washing                                    
Dust control on dumps
 
Dust control on conveyor belts
Wand-Bodenspülung
Sprühvorhang
Sprühvorhang

Wall and deck washing


Spray header
Spray header

 

 Further applications in Flue Gas Desulphurization

Emergency quench                                


Emergency quench


Emergency quench

Notbedüsung Exzenterdüse
Notquench Axial - Vollkegel Düsenstock
Notquench Axial - Vollkegel Düsenstock

Emergency quench 
eccentric nozzle


Emergency quench 
axial – full-cone nozzle


Emergency quench 
axial – full-cone nozzle

 

Flue gas duct cooling cleaning                                      

   

Flue gas duct - cleaning


   

Oxidation air - quenching

Rauchgaseintritt Kamap
Rauchgaseintritt HPE Walsum
Axial - Vollkegel

Flue gas inlet


Flue gas inlet


Axial – full cone

 

Impulse suspending

Vollstrahl
Full cone

Wet FGD

Wet FGD
Nozzles used in Wet Flue-gas Desulphurisation.
Click for Wet Flue-gas Desulphurisation Products

Semi Dry FGD (Spray Dry Absorber)

Semi Dry FGD (Spray Dry Absorber)
Nozzles, Lances and Systems used in Semi Dry Flue-gas Desulphurisation in SDA applications
Click for Spray Dry Absorber Products

Semi Dry FGD (Circulating Fluidised Bed Scrubber)

Semi Dry FGD (Circulating Fluidised Bed Scrubber)
The Environmental Division of Lechler is a major supplier of high pressure spillback water spray nozzles for the Circulating Fluidised Bed Scrubber.
Click for Circulating Fluidised Bed Scrubber Products