SU553982A1 - Heat and mass transfer apparatus - Google Patents

Description

one

The invention relates to chemical engineering, in particular to apparatus for heat and mass transfer processes.

A heat and mass transfer apparatus is known, consisting of tubular contact devices fixed at the bottom and top of the apparatus in tube plates and including inner tubes with swirlers and separation caps and middle tubes coaxial with them, containing upper and lower partitions and radial tubes for supplying liquid .

The disadvantages of this device are the limited increase in the vapor (gas) velocity by inter-ear spacing, the increase in entrainment with an increase in the vapor (gas) velocity, and the difficulty of mounting contact elements in a large number of tristates.

The aim of the invention is to increase the productivity and range of stable operation, improve separation and simplify installation by connecting the increased pressure zone of the upstream inner tubes with the reduced pressure zone of the downstream inner tubes and eliminating gas and liquid from the tubular contact devices. The goal is achieved by the fact that each section of the contact device consists of three coaxially arranged pipes, overlying internal pipes, rigidly fixed with upper partitions of non-arranged middle pipes and forming, with separation caps, downstream internal pipes of a slit, the width of which does not exceed the gap between the cap and the inner tube, and coaxially with the middle tubes, are installed the outer tubes, which meledu fixed the lower partitions

medium tubes.

Such an embodiment of the contact device allows to significantly increase the speed of movement of steam (gas), since the pressure at the outlet of the tubes in the inner tube is always lower than the pressure at the inlet in the annular space. The optimum pressure difference and good phase separation is provided by the slots left when the inner tubes are joined.

The absence of tube plates on a caled plate simplifies the installation of the apparatus.

Pa figs. 1 shows a longitudinal section of the apparatus; in fig. 2-scheme of movement of liquid on the apparatus.

The heat and mass transfer apparatus is a series of independent contact devices mounted on the bottom and top of the apparatus in tube pipes 1. Each device consists of elements that represent

three coaxially disposed pipes, inner 2, middle 3 and outer 4, fixed between themselves by partitions — upper 5 and lower 6, including swirlers 7, caps for separation 8, tubes 9 for supplying liquid. Between the pipes 3 there is a passage (slit 10) for the overflow of fluid. Inner pipes 2 are not fixed by melad. Between them left the gap I.

The device works as follows.

The gas (steam) enters from below through the swirler 7 into the inner pipe 2, picks up the liquid flowing through the pipes 9 and pushes it back to the walls.

The movement of the fluid is shown in FIG. 2. The liquid moves upward along the internal pipe with steam (gas), then, separated from the vapor (gas) by means of the cap 8, moves down through the space between pipes 2 and 3, then the passage through the slit 10 moves through the space between pipes 3 and 4 and re-enters the contact zone through the tubes 9. A part of the gas entering the annular space together with fluidity returns to the inner tube through the slots 11.

Claims (1)

Invention Formula Heat and mass transfer apparatus consisting of tubular contact devices, attached to the top and bottom of the device in tube plates and including internal pipes with twists and separation caps, middle pipes coaxial with them, containing upper and lower partitions attached respectively to the upper part inside and in the lower part outside the pipe, and radial tubes for the supply of fluid crossing the annular gap between coaxial tubes, characterized in that, in order to increase productivity and range of stable operation, improve separation and simplify installation by connecting the zone pressure of the laid-out inner tubes with a reduced pressure zone downstream of the inner tubes, and the elimination of gas and liquid outflow from the tubular contact devices, upstream the inner tubes are rigidly fixed with the upper partitions of the lower middle tubes and form, with the separation caps, the lower inner tubes, the gaps whose width does not exceed the size of the gap between the separating cap and the inner tube, and coaxially with the middle tubes are the outer tubes, between which the lower partitions of the middle tubes are fixed.