A casing having at least one tubular wall extending in a longitudinal direction (L) between two longitudinal ends, and an inner face that participates in delimiting a receptacle for a section of packing, the tubular wall participating in delimiting an input opening at one of its longitudinal ends The casing can also include a device configured to assist installation of a section of packing in the casing, which can include: a cradle which extends in an extension of at least part of the tubular wall from the input opening, in the longitudinal direction, opposite the base wall, the cradle being configured to position the section of packing facing the input opening; a removable cone which is configured to guide the section of packing by centring the section of packing on the input opening, wherein the longitudinal dimension of the cradle is larger than the longitudinal dimension of the removable cone.

A spacer array including a plurality of spacers. Each spacer defines a longitudinal axis and includes a main body, a leading pin, and a trailing pin. The main body has a main body cross-sectional dimension. The leading pin extends from the main body and is upstream of the main body. The leading pin has a leading pin cross-sectional dimension. The trailing pin extends from the main body and is downstream of the main body. The trailing pin has a trailing pin cross-sectional dimension. The main body cross-sectional dimension is greater than the leading pin cross-sectional dimension and the trailing pin cross-sectional dimension.

A method for enabling gas exchange and chemical reactions with one or more liquid streams contained in a reactive process vessel are provided. One or more exchange layers within the process vessel can be composed of both collector media and releaser media. The exchange layers allow elements to facilitate increased performance of vessel operations by promoting gas component mixing and diffusion. Improved rates of gas component exchange mean less coking and more gas components available for reaction.

The present disclosure belongs to the technical field of packings, and in particular, to a packing element, a structured packing and an application of the structured packing. The packing element includes a collection-predistribution unit, a fluid uniform distribution unit, and an opening window unit that are sequentially arranged. The fluid uniform distribution unit includes a first substrate and a plurality of orifices arranged on the first substrate. Each orifice is circular and/or semicircular. Each orifice has an equivalent diameter of 1-5 mm. The opening window unit is provided with a plurality of windows, and each window has a length proportional to 0.5 power of the fluid viscosity. Fluid forms a confined free film in the window region of the opening window unit and wall-bounded film on the wall surface region.