EXN‑903 Special Defoamer for Desulfurization System

1. Product Description

In flue‑gas desulfurization absorption towers, high‑speed counter‑current mixing of gas‑liquid phases together with large amounts of dust in flue gas will generate persistent heavy foam. This causes loss of neutralizing substances and cooling water, and significantly reduces reaction rate and product recovery rate. Massive foam overflow also creates severe safety hazards and power loss for the motor room below cooling towers.

Adding defoamer into desulfurization towers can effectively improve utilization efficiency of cooling water and absorbent, remarkably lower startup frequency and operating quantity of circulating‑water pumps, greatly increase output of sulfate products, reduce on‑site manual maintenance costs and improve overall economic benefits.

2. Product Specifications

3. Usage Instructions

1. Dosing point: Sump of process make‑up water.
2. Dosing method: Intermittent periodic shock dosing or continuous dosing via metering pump.
3. Dosage: Higher dosage is required when foam overflow occurs in absorption tower. Subsequent actual dosage shall be determined by foaming‑agent composition, flue‑gas volume, coal quality, combustion process, absorbent and sulfur‑dioxide content. Users can adjust dosage according to on‑site conditions (recommended dosage: 20‑50 ppm).
4. Dosing frequency: Generally twice per day, one dose per shift. Adjust frequency according to foaming status of absorption tower.

4. Packaging and Storage

EXN‑903 special defoamer for desulfurization system is normally packed in 25 L plastic drums; customized packages are available upon customer requirements.