<prompt> Translate the following text to EnglishKatika hali hii, SCR ni kuunganishwa juu ya chuma na kuundwa juu ya vifaa vya sasa, kama vile precipitators.  <response>: When this type of installation is performed, the SCR reactor is installed atop a steel structure that must be erected above existing equipment, such as the electrostatic precipitator. 