SU466025A1 - Mass-heat exchanger - Google Patents

Description

The invention relates to chemical engineering, in particular to mass transfer heat exchangers for contacting gas-vapor-liquid systems with the removal or supply of heat to the contact zone through the wall, and can be used in various fields of the chemical industry.

A mass heat exchanger is known, containing a housing divided by height with contact plates and tubular coil elements mounted above them for supplying and discharging a heat transfer fluid located in a horizontal plane, the ends of which are connected to collectors.

To increase the intensity of interfacial mass transfer and heat transfer, tubular coil elements are placed in vertical planes relative to the contact plates.

Tubular coil elements can be horizontally displaced relative to each other. Adjacent tubular coil elements can be rotated in a horizontal plane at an angle of 90 °.

FIG. 1 shows the proposed apparatus; in fig. 2 is a section along A-A in FIG. one.

The mass and heat exchange apparatus comprises a housing 1, fittings 2 and 3 for supplying and discharging a heat transfer medium, hatches 4, contact plates 5, for example, of the failure type, installed in

vertical planes tubular coil elements 6, the ends of which are connected to the collectors 7 and 8 for the supply and removal of the coolant, equipped with partitions 9.

The device works as follows.

The liquid enters from above on the tubular coil element either through the distribution plate (not shown in the drawings) or from the upstream element.

Bottom into the apparatus serves steam-gas stream. A turbulent gasol and a liquid (foam) layer are formed on the contact plate, which has a greater liquid holding capacity for the liquid. In this case, the turbulent foam mode propagates upward through the tubular coil element and is supported on the surface of the coils and in the annular space. The vapor-gas flow passes from the bottom up the tubular coil element,

in the separation space, it is separated from the dropping liquid and enters the upstream tubular coil element. The fluid moves down the tubular coil element and from the contact plate.

flows down to the downstream serpentine element.

A coolant is supplied through coils and inlet manifold into the coils, which, through their walls, releases or removes heat from the gas-vapor-liquid contact zone.

When the heat transfer fluid moves inside the coil elements, additional heat transfer occurs due to a change in the direction of its flow as it moves along the ascend, and downstream sections of the tubular coil elements. The turbulization of a heat carrier located in coil elements that are immersed in a well-turbulized gas-liquid foam layer contributes to an additional intensification of heat transfer through the wall.

Multidirectional movement of a gas-liquid flow on the surface of inclined sections of coil elements, as well as a change in the direction of the vapor-gas flow, leads to a uniform distribution of flows over the cross section of the apparatus so that a horizontally turbulent and progressed gas-liquid layer takes place on the surface of the contact elements.

The shift of the tubular coil elements within the contact plate relative to each other, as well as the reversal of the longitudinal axes of the coil elements with respect to the axes of the slots of the collapsible plate of a lattice or pipe-lattice type or with respect to the longitudinal axes of the coil elements in the adjacent elements by an angle of up to 90 ° causes additional pulsations of the gas flow, which contributes to additional turbulence in the gas-liquid layer.

The heat carrier from the coil elements through the manifold and through the nozzle is either removed from the apparatus or fed into the next tubular coil element.

Inspect and clean tubular serpentine elements through hatches.

Subject invention

Claims (3)

1.Mass-heat exchanger, comprising a housing, sectioned along the height of contact plates, and tubular coil elements mounted above them for supplying and taking out heat transfer fluid, the ends of which are connected to collectors, characterized in that, in order to intensify the interfacial mass transfer and heat transfer, the tubular coil elements have a body element that intensifies interfacial mass transfer and heat transfer, tubular coil elements and heat transfer elements to intensify the interfacial mass transfer and heat transfer. vertically relative to the contact plates. 2. The apparatus according to claim 1, wherein the tubular coil elements are horizontally displaced relative to each other. 3. The device on PP. 1 and 2, characterized in that adjacent tubular coil elements are rotated in a horizontal plane through an angle of 90 °. A - / I Vuz.Z