Multi-pollutant abatement device and method
First Claim
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1. A system for removing contaminants from an industrial stream of exhaust gas, the system comprising:
- a first misting stage configured to receive the stream of exhaust gas and contact the stream of exhaust gas with mist of water and hydrogen peroxide (H2O2) to create a first liquid comprising first liquid acids, the first liquid acids comprising nitric acid (HNO3) and carbonic acid (H2CO3);
a first condensing medium configured to condense the first liquid acids from the stream of exhaust gas comprising HNO3 and H2CO3 and to collect on a surface of the first condensing medium a first residual liquid mixture of HNO3 and H2CO3;
a second misting stage configured to receive the stream of exhaust gas and contact the stream of exhaust gas with water mist to create a second liquid comprising second liquid acids, the second liquid acids comprising nitric acid (HNO3) and carbonic acid (H2CO3);
a second condensing medium configured to condense the second liquid acids from the stream of exhaust gas comprising HNO3 and H2CO3 and to collect on a surface of the second condensing medium a second residual liquid mixture of HNO3 and H2CO3;
a third misting stage configured to receive the stream of exhaust gas and contact the stream of exhaust gas with a mixture of chilled water and amine (RNH2) to form a liquid solution of carbon dioxide (CO2);
a third condensing medium configured to condense the liquid solution of CO2 and to collect on a surface of the third condensing medium a third residual liquid mixture of HNO3, H2CO3, and CO2; and
an activated carbon stage configured to receive the stream of exhaust gas and to contact the stream of exhaust gas with granular activated carbon to further remove trace contaminants from the exhaust gas stream.
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Abstract
A method for removing contaminants from industrial exhaust gas. The method includes contacting the exhaust gas with a mist of water and RNH2 (amine) to form a liquid solution of CO2. The method further includes extracting the liquid solution of CO2 and contacting the exhaust gas with granular activated carbon.
48 Citations
15 Claims
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1. A system for removing contaminants from an industrial stream of exhaust gas, the system comprising:
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a first misting stage configured to receive the stream of exhaust gas and contact the stream of exhaust gas with mist of water and hydrogen peroxide (H2O2) to create a first liquid comprising first liquid acids, the first liquid acids comprising nitric acid (HNO3) and carbonic acid (H2CO3); a first condensing medium configured to condense the first liquid acids from the stream of exhaust gas comprising HNO3 and H2CO3 and to collect on a surface of the first condensing medium a first residual liquid mixture of HNO3 and H2CO3; a second misting stage configured to receive the stream of exhaust gas and contact the stream of exhaust gas with water mist to create a second liquid comprising second liquid acids, the second liquid acids comprising nitric acid (HNO3) and carbonic acid (H2CO3); a second condensing medium configured to condense the second liquid acids from the stream of exhaust gas comprising HNO3 and H2CO3 and to collect on a surface of the second condensing medium a second residual liquid mixture of HNO3 and H2CO3; a third misting stage configured to receive the stream of exhaust gas and contact the stream of exhaust gas with a mixture of chilled water and amine (RNH2) to form a liquid solution of carbon dioxide (CO2); a third condensing medium configured to condense the liquid solution of CO2 and to collect on a surface of the third condensing medium a third residual liquid mixture of HNO3, H2CO3, and CO2; and an activated carbon stage configured to receive the stream of exhaust gas and to contact the stream of exhaust gas with granular activated carbon to further remove trace contaminants from the exhaust gas stream. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification