Removing acids from boiler flue gas allows users the opportunity to profit from the need to operate an air pollution control system.
While traditionally applied technologies are well known, such as SCR NOx reduction, the secret lies in Dürr’s low-CAPEX SCR active Catalytic Hot Gas Filter in combination with the cost-effective Furnace Sorbent Injection system engineered by ClearChem Development. Acid-free flue gas liberates steam for electricity generation while intelligent utilization of the latent heat of vaporization takes over the heating of the boiler feed water. As a major result the boiler heat rate is improved, contributing to the boiler’s efficiency as well as necessary BSER achievements of the Clean Power Plan, like CO2 reduction.
Intelligent integration of the Dürr and ClearChem technology in a side stream arrangement of existing air pollution control equipment, as shown in the above ESP example, can furthermore help to improve the overall performance by:
- Changing operation mode of existing equipment to partial load, thereby helping to reduce consumption figures and enhance efficiencies
- Meeting additional emission requirements by incremental addition of functionality, like SCR NOx reduction, in a side stream arrangement without putting power production at risk
- Being upgradeable for future requirements thanks to modular design
- Improving all over sulfur reduction while at the same time allowing for condensing operation
While CAPEX requirements for a side stream arrangement can be even further reduced, necessary footprint is optimized for the required achievement. Mrs. Wiebke Hagendorf-Schroter, VP of Dürr Clean Technology Systems, says, “We are proud to present a technology that helps our customers in a cost effective way to address greenhouse gas emission reduction for existing coal fired boilers, while for the first time offering a return on investment. This is an important step towards useful lifetime extension for our customer’s assets.”