Head for the heat-mass-exchanging apparatuses

FIELD: chemical industry; other industries; production of the heads for the heat-mass-exchanging apparatuses.

SUBSTANCE: the invention is pertaining to the devices of heat-mass-exchanging apparatuses with the fluidized three-phase layer and may be used in chemical industry and other industries at purification of the gas bursts of the harmful gaseous components. The head for the heat-mass-exchanging apparatuses is made in the form of the torus produced out of the cylindrical component made out of the synthetic filaments by its twisting from one or two ends. The cylinder is made out of the longitudinal filaments fasten among themselves in the staggered order with formation of the longitudinal cells. At that the diameter of the head exceeds its height in 1.25-1.33 times, and the ratio of the cell height to the diameter of the head makes 0.25-0.3. At utilization of the head the gas-liquid layer is uniformly distributed in the operation volume of the apparatus, that predetermines the stable hydrodynamic situation. At that the mass exchanging process is intensified due to the highly developed surface and the strong turbulization of the gas-liquid layer.

EFFECT: the invention ensures the gas-liquid layer uniform distribution in the operation volume of the apparatus, the stable hydrodynamic situation, intensification of the mass-exchange process.

4 dwg

 

The invention relates to devices of heat and mass transfer devices with three-phase fluidized layer. Can be used in chemical and other industries with gas purification from harmful gaseous components.

Known regular nozzle of Kotlyarovskiy made in the form of units consisting of laid one upon the other tori, a total hole which until filling is complete inserted compressed laterally of the Torah, with the axis of the tori are mutually perpendicular and are Torah made of knitted cylinder by folding one or both ends (SU 1291192 A1, 1985, B 01 J 19/32).

The disadvantages of this device are increased hydraulic resistance due inserted compressed laterally tori, as well as a significant increase of the consumption of nozzles without appreciable gain in heat and mass transfer characteristics.

Closest to the proposed is a three-dimensional nozzle, consisting of tori, each of which is made of synthetic monofilament weft knitting stitch of two identical diameter jerseys cylinders having a common axis. The Torah stacked on top of each other and made of a cylindrical element by folding one or both ends (SU 1711964 A1, 1989, B 01 J 19/32).

This nozzle is impractical to use in devices with three-phase is sevdigini layer, as it is quite large and, in addition, its shape will not provide intensive turbulence in gas-liquid layer. This nozzle has a large diameter of the Torah compared to the pipe diameter of the torus, which leads to the formation of the hole in the nozzle body, and this in turn reduces the contact surface phases.

The objective of the invention to create an apparatus of the stable hydrodynamic conditions developed fluidization counterflow movement of liquid and gas.

This object is achieved in that the nozzle is in the form of a torus made of a cylindrical element made of synthetic fibres by folding one or both ends, according to the invention the cylinder is made of longitudinal fibers, bonded together in a checkerboard pattern with the formation of longitudinal cells, the diameter of the nozzle is greater than the height 1.25-1.33 times, and the ratio of cell height to the diameter of the nozzle is 0.25 to 0.3.

1 schematically shows a nozzle, figure 2 is a fragment of a checkerboard arrangement of grid cells in figure 3 and 4 the nozzle in axonometric projection.

The nozzle 1 is made of a cylindrical element, which can be rolled up from one end. The cylinder is made of longitudinal threads 2, which is bonded in a staggered manner with the formation of cells. Ratio ;

Example 1.

Figure 3 shows the nozzle, the diameter of which is equal to 60, the height of the nozzle 45, and the cell height 15 mm Cylindrical element is rolled into a torus with one hand.

Ratio;.

Example 2.

Figure 4 shows the nozzle, the diameter of which is equal to 50, the height of the nozzle 40, and the cell height 15 mm, Ratio;.

The nozzle operates as follows.

The nozzle is put in heat and mass transfer apparatus on the distribution grid. In the initial stage of operation, the nozzle is stationary. The gas coming from the bottom of the apparatus, passes through the channels formed between the nozzle and inside of the Packed bodies, where it meets with the liquid coming from the top. The channels have a complex shape as the nozzle is made of mesh material. The nozzle has a large contact surface per unit volume.

With the increase of gas velocity occurs regime developed fluidization, in which all of the Packed body completely transformed in suspension, they randomly move around the working volume of the device, creating a stable hydrodynamic layer. Intense, continuous updating of the surface contact of the phases.

When using the developed gas-liquid nozzle layer is evenly distributed in the working volume of the apparatus due to the shape of the nozzle and its cellular structure, which determines a stable hydrodynamic conditions. In addition, intensified the process of mass transfer due to the highly developed surface and strong turbulence in gas-liquid layer. The magnification ratiochanges the shape of the nozzle, which in turn complicates its use in devices with three-phase fluidized bed of irrigated nozzle, and the reduction in reduction in mass transfer capacity.

The magnification ratioleads to the seal structure of the nozzle and the increase in hydraulic resistance, and the decrease of this ratio leads to reduction of contact surface phases and to reduce mass transfer capacity.

Thus, the present invention allows to create the device stable hydrodynamic conditions developed fluidization counterflow movement of liquid and gas.

Nozzle for heat and mass transfer devices in the form of a torus made of a cylindrical element made of synthetic fibres by folding one or both ends, characterized in that the cylinder is made of a CR the longitudinal threads, bonded together in a checkerboard pattern with the formation of longitudinal cells, the diameter of the nozzle is greater than the height 1.25-1.33 times, and the ratio of cell height to the diameter of the nozzle is 0.25 to 0.3.



 

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