Patent ID: 6837336

Claim:
Apparatus for treating a gas stream, which apparatus comprises a plurality of compartments within which one or more treatments are to be performed on a gas stream passing through the compartment, and through which the gas stream is to flow sequentially, characterised in that: a. at least two of said compartments each comprises a tubular body member containing or carrying a treatment element which is restrained against axial movement relative to the body member; and b. the tubular body members of the adjacent compartments are provided with radially outwardly and/or inwardly extending terminal flanges, at least some of which flanges provide a shoulder against which the opposing terminal portion of the adjacent compartment bears so as to form an axially extending structure comprising at least two compartments in axial or coaxial relationship to one another; and c. clamping means which extend axially over substantially the length of the said structure apply an axial force to the axial structure to secure the two adjacent compartments together in gas-tight engagement by an axial clamping action.