The present invention is a wet scrubber having a forced mixing chamber on top of an immersed packed bed, significantly increasing the scrubbing efficiency of acid gases and other pollutants by maximizing gas to liquid contact. A mixing fan located outside of the wet scrubber being connected to a mix
The present invention is a wet scrubber having a forced mixing chamber on top of an immersed packed bed, significantly increasing the scrubbing efficiency of acid gases and other pollutants by maximizing gas to liquid contact. A mixing fan located outside of the wet scrubber being connected to a mixing zone through an inlet duct to receive fluid from the mixing zone and an exhaust duct to blow fluid back into the mixing zone, thereby enhancing the mixing process inside the mixing zone.
대표청구항▼
1. A wet scrubber to clean contaminated gases, comprising: a. a vertically oriented structure having a lower section, a middle section, and an upper section, a gas intake pipe at the lower section to bring contaminated gases into the scrubber and a gas exhaust pipe at the upper section to carry clea
1. A wet scrubber to clean contaminated gases, comprising: a. a vertically oriented structure having a lower section, a middle section, and an upper section, a gas intake pipe at the lower section to bring contaminated gases into the scrubber and a gas exhaust pipe at the upper section to carry clean gases out of the scrubber;b. an immersed packed bed in the lower section of said structure and above said gas intake pipe, wherein said packed bed being immersed in a scrubbing liquid, whereby said contaminated gases being forced through the immersed packed bed as gas bubbles;c. a mixing chamber located immediately above the immersed bed and at substantially the middle section of the structure;d. a mixing fan located outside of the structure and being connected to said mixing chamber through an inlet duct to receive a fluid from the mixing chamber and an exhaust duct to blow said fluid back into the mixing chamber, thereby enhancing the mixing process inside the mixing chamber;e. said exhaust duct having baffles to generate an upward moving flow;f. multiplicity of mist sprayers to spray a scrubbing liquid into the mixing chamber, said sprayers located immediately above the mixing chamber and substantially uniformly distributed across the cross section of the mixing chamber; andg. a mist eliminator located immediately above the mist sprayers; andh. a draft fan to induce gas flow inside the scrubber, whereby contaminated gases enter the scrubber and clean gases leave the scrubber. 2. The scrubber of claim 1, wherein said immersed packed bed being filled with rings or saddles of various materials or contain structured packing or any other similar material. 3. The scrubber of claim 1, wherein the immersed packed bed having a thickness, a bottom-surface, a top-surface, and a variable porosity, wherein said porosity reducing from the bottom-surface to the top-surface, whereby the gas bubbles being forced to reduce in size as the bubbles move through the thickness of said bed. 4. The scrubber of claim 1, further having a liquid recirculation loop having means to trap a liquid exiting the mixing fan and having a pump to pump said trapped liquid back to the mist sprayers. 5. The scrubber of claim 1, further having shut off and control valves installed in said inlet duct and said exhaust duct on both sides of the mixing fan to control the fluid flow through the mixing fan. 6. The scrubber of claim 1, wherein the said mixing fan being coupled with said draft fan through a control system to control the pressure and level mixing inside the scrubber. 7. The scrubber of claim 1, further having a dehumidifier means located above the mist eliminator. 8. The scrubber of claim 1, wherein said draft fan being on the gas exhaust pipe. 9. The scrubber of claim 1, wherein said immersed packed bed having a predetermined pressure drop to retain a prescribed level of the scrubbing liquid immediately above the top-surface of the bed. 10. The scrubber of claim 9, wherein said prescribed level of liquid being between 1 to 6 inches of liquid. 11. The scrubber of claim 1, wherein said inlet duct of said mixing fan having a predefined angle with respect to the said exhaust duct of said mixing fan, whereby, said angle can produce a swirling vortical flow inside the mixing chamber. 12. The scrubber of claim 11, wherein said predefined angle being between 0 to 10 degrees. 13. A wet scrubber to clean contaminated gases, comprising: a. a vertically oriented structure having a lower section, a middle section, and an upper section, a gas intake pipe at the lower section to bring a contaminated gases into the scrubber and a gas exhaust pipe at the upper section to carry a clean gas out of the scrubber;b. an immersed packed bed above the gas intake pipe said bed being immersed in a scrubbing liquid, wherein said contaminated gases being forced through the immersed packed bed as gas bubbles;c. said immersed packed bed having a thickness, a bottom-surface, a top-surface, and a variable porosity, wherein said porosity reducing from the bottom surface to the top surface, whereby the gas bubbles being forced to reduce in size as the bubbles move through the thickness of said bed;d. a mixing chamber located immediately above the immersed bed and at substantially the middle section of the structure;e. a mixing fan located outside of the structure and being connected to the mixing chamber through an inlet duct to receive fluid from the mixing chamber and an exhaust duct to blow fluid back into the mixing chamber, thereby enhancing the mixing process inside the mixing chamber;f. multiplicity of mist sprayers to spray a scrubbing liquid into the mixing chamber, said sprayers located immediately above the mixing chamber and substantially uniformly distributed across the cross section of the mixing chamber;g. a mist eliminator located immediately above the mist sprayers; andh. a draft fan to induce gas flow inside the scrubber, whereby contaminated gases enter the scrubber and clean gas leaves the scrubber. 14. A wet scrubber to clean contaminated gases, comprising: a. a vertically oriented structure having a lower section, a middle section, and an upper section, a gas intake pipe at the lower section to bring contaminated gases into the scrubber and a gas exhaust pipe at the upper section to carry a clean gas out of the scrubber;b. an immersed packed bed above the gas intake pipe said bed being immersed in a scrubbing liquid, wherein said contaminated gases being forced through the immersed packed bed as gas bubbles;c. a mixing chamber located immediately above the immersed bed and at substantially at the middle section of the structure;d. a mixing fan located outside of the structure and being connected to the mixing chamber through an inlet duct to receive fluid from the mixing chamber and an exhaust duct to blow fluid back into the mixing chamber, thereby enhancing the mixing process inside the mixing chamber;e. multiplicity of mist sprayers to spray a scrubbing liquid into the mixing chamber, said sprayers located immediately above the mixing chamber and substantially uniformly distributed across the cross section of the mixing chamber;f. a liquid recirculation loop having means to trap a liquid exiting the mixing fan and having a pump to pump said trapped liquid back to the mist sprayers;g. a mist eliminator located immediately above the mist sprayers; andh. a draft fan to induce gas flow inside the scrubber, whereby contaminated gases enter the scrubber and clean gas leaves the scrubber.
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