Emissions from power plants are increasingly becoming a global concern that is forcing countries to set tougher and tougher standards for meeting regulations. Compliance with these requirements comes at a cost — resources required to install and maintain the necessary equipment that is often exacerbated by a reduction in efficiency. These harmful emissions that are products of combustion (POC) are typically classified as NOx, SO2, CO2, UHC (unburned hydrocarbons) and Particulate and sometimes heavy metals like mercury, arsenic, etc. Currently there are specific methods available for reducing each of these emissions individually but there is no single system in use that can remove all these unwanted emissions simultaneously — at least not until now. With the proposed system, all these emissions can almost be entirely eliminated from the flue gases concurrently. The process essentially consists of ozone injection for NOx conversion, fogging spray mixed with hydrogen peroxide solution for SO2 conversion and condensing these along with other pollutants over coils to remove all pollutants from exhaust gas stream. As a result, the NOx and SO2 end up as nitric and sulfuric acid in the wastewater stream collected at the bottom of the unit. In addition, UHC and particulate are also removed during the condensation process along with some carbonic acid resulting from dissolved CO2. This waste water can then be treated accordingly and recycled. Another major advantage of this process is the heat absorbed by circulating water in the condensing coils that can be effectively utilized to improve plant performance and overall thermal efficiencies.

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