Method for removing contaminants from exhaust gases
First Claim
1. A method for the partial removal of contaminants from a process gas stream comprising the steps of:
- conveying a stream of untreated process gas through an inlet of a scrubber into a scrubbing zone of the scrubber,dividing the gas stream at the scrubber inlet free of any physical obstruction in the scrubber extending the length of the scrubber from the inlet to an outlet into a plurality of process gas streams partitioned from one another,feeding ozone into contact with selected ones of the partitioned gas streams in the scrubber to oxidize contaminants in the partitioned gas streams,removing the oxidized contaminants from the selected partitioned gas stream, andrecombining the selected partitioned gas streams substantially free of contaminants with the remaining partitioned gas streams containing contaminants.
2 Assignments
0 Petitions
Accused Products
Abstract
An exhaust gas stream from a combustion process is conveyed through a gas distributor at an inlet of a wet horizontal spray scrubber where it is partitioned into a plurality of spaced apart gas streams. The gas stream is partitioned in the scrubber without the need for any physical partitions. A preselected number of the partitioned gas streams are mixed with ozone to oxidize the contaminants. The oxidized gas streams are then sprayed with an aqueous medium to capture the oxidized contaminants and remove them from the treated gas streams. The treated gas streams are then recombined with the untreated gas streams. Excess ozone present in the treated gas streams is consumed by oxidation of contaminants in the untreated gas streams before the combined gas stream is released to the atmosphere.
-
Citations
18 Claims
-
1. A method for the partial removal of contaminants from a process gas stream comprising the steps of:
-
conveying a stream of untreated process gas through an inlet of a scrubber into a scrubbing zone of the scrubber, dividing the gas stream at the scrubber inlet free of any physical obstruction in the scrubber extending the length of the scrubber from the inlet to an outlet into a plurality of process gas streams partitioned from one another, feeding ozone into contact with selected ones of the partitioned gas streams in the scrubber to oxidize contaminants in the partitioned gas streams, removing the oxidized contaminants from the selected partitioned gas stream, and recombining the selected partitioned gas streams substantially free of contaminants with the remaining partitioned gas streams containing contaminants. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A method for the partial removal of contaminants from a process gas stream comprising the steps of:
-
conditioning the process gas stream emitted from a combustion process, conveying the conditioned process gas stream to an inlet of a scrubber, distributing the process gas stream at the inlet free of any physical obstruction in the scrubber into a flow pattern forming a plurality of partitioned gas streams, injecting ozone into one or more of the partitioned gas streams to mix ozone with the contaminants in a preselected percentage of the entire process gas stream, oxidizing the contaminants in the selected partitioned gas stream by mixing with ozone, capturing the oxidized contaminants in a separation device to remove the contaminants from the selected partitioned gas stream, and reuniting the selected partitioned gas stream substantially free of contaminants with the remaining partitioned gas streams containing contaminants. - View Dependent Claims (12, 13, 14, 15)
-
-
16. Apparatus for the partial removal of contaminants from a process gas stream comprising:
-
a scrubber having an inlet and an outlet with a chamber positioned there between, said chamber being free of any obstructions diverting the flow of the process gas stream from said inlet through said chamber to said outlet, a gas distributor positioned at said inlet section for receiving and evenly distributing the process gas stream across said inlet entering said chamber into a flow pattern of separated gas streams extending from said inlet to said outlet, a source of ozone positioned at said inlet for injecting ozone into selected ones of said separated gas streams to oxidize a preselected percentage of the gas stream flowing through said chamber, a capture device positioned in said chamber for receiving the oxidized gas streams before exiting through said outlet to remove the oxidized contaminants from the gas streams, and said outlet receiving the gas stream free of contaminants for mixing with the gas stream containing contaminants. - View Dependent Claims (17, 18)
-
Specification