Stack system

DETAILED DESCRIPTION I claim: 1.
A stack system comprising in combination a stack, one or more elongate struts extending along and being spaced apart from said stack, a plurality of rings spaced apart from each other and being attached to said struts, said rings encircling said stack, being located close to or touching said stack and not being attached to said stack, and a plurality of flexible guy wires attached to one or more of said rings or struts and to the ground.
2.
A stack system according to claim 1 in which the vertical stack is a flare stack, a vent stack, a chimney or an aerial.
3.
A stack system according to claim 1 which the elongate struts are equi-spaced around the stack.
4.
A stack system according to claim 1 in which the rings are equi-spaced along the struts.
5.
A stack system according to claim 1 having outward projections from the body of the stack, the projections being capable of engagement with the elongate struts so as to resist torsional collapse or buckling of the stack.
6.
A stack system according to claim 5 in which the projections are struts or plates.
7.
A stack system according to claim 5 or claim 6 in which one or more pairs of the outwardly projecting struts are located on the stack body, each pair of struts being capable of engagement with the elongate struts and an adjacent encircling ring.




Description:
This invention relates to a stack system.
Tall flare stacks and vent pipes which are constructed in oil refineries and other industrial or petrochemical plants often require support against wind loads.
This support can be provided by sets of guy wires anchored to the ground and attached to the stack.
If the stack is subject to large temperature variations due to process operations or to the environmental conditions, it may not be possible to obtain a guy wire configuration which will remain at the correct tensions in the presence of the thermal movements of the stack.
In such cases it is usual to surround the stack by a lattice frame of steel members