Sulfuric Acid Plant Processes

Sulfur Burning
Metallurgical
Spent Acid Recovery
Wet Gas Sulfuric Acid Process
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Technologies / Sulfuric Acid Plant Processes / Metallurgical

Metallurgical Process

Off gas from essentially any continuous or semi-continuous process that contains SO₂ gas is pulled through the primary DynaWave® Reverse Jet Scrubber where it is cleaned and cooled to its adiabatic saturation temperature by recirculation weak acid. Next, the gas is cooled in the gas-cooling tower, to a point where the moisture level is reduced to the amount required in the product acid. Next, depending on the level of impurities in the feed gas, a final DynaWave Jet Scrubber may be used. The final stage of gas cleaning is a wet electrostatic precipitator (WESP), which removes both liquid and solid particulate matter to prevent corrosion and fouling in the acid plant. The gas is then pulled through the high efficiency-drying tower where the remaining water vapor is removed. A Brink Mist Eliminator provides efficient acid mist removal for the protection of the main compressor. The dry, clean gas is then compressed and introduced to the converter system.

SO₃ Absorption

After passing through the first three layers of MECS XLP and Cesium catalyst, SO₃ rich gas is cooled and absorbed with 98% sulfuric acid (H₂SO₄) in the Interpass absorption tower. The lean SO₂ gas flows through a Brink Mist Eliminator to remove fine mist particles, thereby protecting downstream equipment. The clean gas is then reheated and enters the converter to complete the conversion of SO₂ to SO₃. The SO₃ formed is absorbed in 98% H₂SO₄ in the final absorbing tower. Brink Mist Eliminators are installed in the final tower to insure the stack gas will meet environmental regulations on acid mist.