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Figure 1


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Schematic diagram of the lab-scale plant for Na2S production: (1) and (9) gas flow meters, (2) H2S analyzer, (3) NaOH solution tank, (4) and (14) electric heaters; (5) spray column, (6) collecting tank, (7) mixer, (8) steam coils, (10) and (15) pumps, (11), (16) and (17) rotameters, (12) fresh NaOH solution tank, (13) valve, (18) pH-meter, (19) solution tank and PG: Pressure Gauge, TC: Temperature Controller.

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