ORP as slurry oxidation index and model modification in wet desulfurization system

Figures & data

Figure 1. Structure of the absorption tower.

Table 1. Experimental drugs and instruments.

Species	Manufacturer	Model
ORP detector	E + H	CPS-12D
pH detector	Lu Heng Biological	DG-1601
DO detector	Shanghai Sanxin	SX-751
I2	Kimiou	AR
KI	Kimiou	AR
Na2S2O3	Kimiou	AR
Starch	Kimiou	AR

Figure 2. Test data characteristics.

Table 2. Model analysis.

	R^2	RMSE(mV)	NRMSE(%)
Fitting group	0.91	0.29	0.3
Whole group	0.76	15.26	10.2

Figure 3. Comparison of actual measured values and fitting results.

Figure 4. Gypsum SEM generated under low ORP and normal ORP conditions.

(a) Under low ORP conditions. (b) Under normal ORP conditions.

Figure 5. Calcium sulfite SEM.

Figure 6. Comparison of sulfite concentration.

Figure 7. Changes in ORP, pH, and sulfite concentration.