FILTER FOR FLUIDS, IN PARTICULAR FOR GAS, IN A PETROCHEMICAL INSTALLATION

摘要

1. A filter for filtering fluids, in particular gas, in petrochemical plants, comprising: a tubular cartridge (4) that extends along the first axis (A1), is configured to filter the fluid and contains first and second annular ends (5, 6); - the housing (7), connected to the pipeline (2) of the petrochemical installation, accommodates the said tubular cartridge (4) and contains the first and second end supports (8, 9; 27, 9); and - an axial compensation ring (10) located between the tubular cartridge (4) and the first or second end support (8, 9); characterized in that the tubular cartridge (4) contains a freely supported metal pipe (28), which has a wall (31) with many holes (32; 33; 34) located unevenly, forming a metal pipe (28) along the wall (31), at least one longitudinal strip (63) parallel to the first axis (A1) and not containing holes (32; 33; 34), and at least one annular strip (64) without holes (32; 33; 34) to strengthen the metal pipe (28) .2. The filter according to claim 1, in which the axial compensation ring (10) contains the first and second rings (39, 40) with the possibility of sliding axially connected to each other by an elastic connecting device (41). The filter according to claim 2, in which the elastic connecting device (41) contains many connecting modules (42), preferably spaced at equal distances along the first and second rings (39, 40) and along the first axis (A1). The filter according to claim 3, in which each connecting module (42) contains: a pin (43) attached to the second ring (40) and connected to the first ring for sliding parallel to the first axis A1; and an elastic element (44) inserted between the first and second count