Wastewater Solids Incineration Systems by Water Environment Federation

Author:Water Environment Federation
Language: eng
Format: epub
Publisher: McGraw-Hill Education
Published: 2009-11-15T00:00:00+00:00

2.5.2 Advantages and Disadvantages

The advantages of the tray scrubber are that pressure losses in the system range from 0.5 to 0.7 kPa (2 to 3 in w.c.) per tray. Because three trays are typically used, the overall pressure drop is approximately 2.2 to 3 kPa (9 to 12 in w.c.). To achieve sub-cooling of the flue gas to 38 to 43°C (100 to 110°F), liquid flow rates of 3.4 to 6.7 L/m3of saturated flue gas (25 to 50 gpm per 1000 acfm) (i.e., following the Venturi scrubber) are required.

Because this type of scrubber is inefficient in removing small diameter particles, it cannot be used as the sole particulate control device. It also requires large quantities of water to operate, which then must be treated. This excess water is typically not a problem at a WWTP. However, this can be a significant concern at WWTPs that are required to produce a high-quality effluent and want to minimize recycle flows to the WWTP.

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