Gas filtration unit with pressurised gas cleaning nozzle inside clean gas chamber, ejects prim. cleaning gas from annular slot and along outside of guide body open to sec. gas inside the chamber

摘要

Prim. cleaning gas is ejected from an annular slot and along the outer side of a guide body inside the clean gas chamber (8) where the cleaning nozzle (11) is located. The guide body is also open to the sec. gas inside the chamber. DETAILED DESCRIPTION - A filter unit for filtering a gas includes at least one filter element (7) with an outlet opening (10), at a distance (A) from which is positioned a cleaning nozzle located inside a clean gas chamber. A source of prim. cleaning gas (12) is connected to the nozzle via a control valve (15), and this gas is ejected from an annular slot and along the outer side of a guide body inside the chamber. The guide body is open to the sec. gas inside the chamber.