Combined with debugging in emergency desulphurization of the boiler in Shanghai Caojing Thermal Power Co Ltd

the operation features of lime/gypsum desulphurization technology has been presented

the reasonable range and control method of technological parameters

such as concentration of lime slurry

the pH value and density of slurry from absorption tower

etc.

is being summarized up.Results of debugging show that the efficiency of desulphurization decreases as the density of slurry from absorption tower being greater than 1 140 kg/m3

hence

reasonably controlling the density of slurry from the absorption tower can make the desulphurization efficiency of said lime/gypsum desulphurization system to keep at above 95%

and the quality of gypsum being good

and the stability of system operation

as well as every economic index

such as consumption of water

electricity

and lime powder all being within the designed value.