Vacuum packed partitioned column

 

(57) Abstract:

Can be used in the processes of interaction of gas (vapor) - liquid. The inventive vacuum Packed partitioned column includes a vertical cylindrical casing, inside of which the height is in turn mounted centrifugal partitioning perforated grilles, made in the form of cones, oriented vertices up with diameter equal to the inner diameter of the column, and centripetal partitioning perforated grilles, made in the form of cones, oriented foundations upwards, tightly attached to the inner walls of the housing of the column, with the angle forming more than twice than for centrifugal grilles, perforated grilles are made in the form of arched slots protuberances up evenly spaced concentric circles, the axis of the arched slots in radial gratings oriented at an acute angle to form from the periphery to the center in the same direction, on each lattice neporyadochno stacked layer of the nozzle, the axis of the arched slots centrifugal gratings oriented at an acute angle to form from the center to the periphery in the same direction, in order to increase the efficiency of mass transfer between the gas (vapor) and liquid by increasing the interfacial surface mass transfer in the free volume of the nozzle and provide patterns of fluid flow, close to the model of an ideal displacement in the horizontal plane in the radial direction with full agitation of the liquid in the layer height of the nozzle in section. 8 Il.

The invention relates to the structures of mass transfer columns Packed type for gas (vapor) - liquid intended for the processes of absorption, rectification and particularly vacuum distillation under conditions of low volume loads of liquid and very large bulk loads on gas (pair) and can find application in chemical, petrochemical, gas and other industries.

Known nozzle partitioned column comprising a vertical cylindrical housing supporting a distribution grid, the packing layer on the grid, smart truncated cone in the peripheral part of the column, set a smaller base down, with arched grooves cut on the surface of the cone bulge up, evenly spaced concentric circles with respect to the axis of the cone, the cross-section of the smaller base of the cone is less than 0.1 cross section of the column, a perforated supporting distributive lattice is made in the form of arched slots with the direction of the axes of the tra to the periphery, accordingly, with the increase of the diameter of the column, the axis of the arched slots on the surface of the cone is directed at an acute angle to form a cone from the surface to the center section of the arched slots cones more sections of the arched slots distributive lattices.with. N 1755858, class B 01 D 3/22, 3/32).

Known column provides increased performance due to the presence of the separation space between the bars with layers nozzles on them and increase the efficiency of mass transfer compared to known conventional Packed column.

The disadvantage of the column is the lack of surface mass transfer between liquid and gas (vapor) when liquid flows from the periphery to the centre, the failure of the fluid in the perforated part, vipasyana and the channel translating in liquid flows, resulting in reduced efficiency of mass transfer between the gas (vapor) and liquid, since the liquid mixing overall efficiency of the mass transfer steps approaching the local efficiency of mass transfer, which, as you know, is always less than 1.

To improve the efficiency of mass transfer in Packed partitioned column comprising a vertical cylindrical casing, Lennie in the form of cones, oriented peaks up to a diameter equal to the inner diameter of the column, and centripetal partitioning perforated grilles, made in the form of cones, oriented foundations upwards, tightly attached to the inner walls of the casing columns with angle forming more than twice than for centrifugal grilles, perforated grilles are made in the form of arched slots bump up evenly spaced concentric circles, the axis of the arched slots in radial gratings oriented at an acute angle to form from the periphery to the center in the same direction, on each lattice neporyadochno stacked layer of the nozzle, the axis of the arched slots centrifugal gratings oriented at an acute angle to form from the center to the periphery in the same direction, the layer height of the nozzles on each grid is 2.5 linear element size nozzles.

The proposed design of vacuum Packed partitioned columns due to their distinctive characteristics provides a solution to a technical problem - improving efficiency in layers nozzles centrifugal arrays.

In Fig. 1 presents schematically prodelin is 1

In Fig. 3 is the same in the plane b-B in Fig. 1.

In Fig. 4 - section b-b In Fig. 2.

In Fig. 5 - section G-G in Fig. 2.

In Fig. 6 - spacer ring, top view.

In Fig. 7 is a view along d-D in Fig. 6.

In Fig. 8 is a view along e-E in Fig. 6.

Partitioned Packed column (Fig.1 - 8) includes a vertical cylindrical casing 1, tiered located at the height of the inside turn of the centrifugal partitioning perforated grid 2 made in the form of cones, oriented peaks up to the diameter of the bases is equal to the inner diameter of the casing, forming an acute angle to the horizontal, and radial partitioning perforated grating 3, is made in the form of cones, oriented bases up tight to the walls of the housing 1 of the column with a tilt angle to form a horizontal two times greater than for centrifugal gratings 2, perforation centrifugal gratings 2 are made in the form of arched slots 4 bulge up, evenly spaced concentric circles, with the axes directed at an acute angle to form from the center to the periphery in the same direction, perforation centripetal gratings 3 vam, with the axes directed at an acute angle to form from the periphery to the center in the same direction. For a snug fit centripetal grating 3 to the walls of the housing 1 their outer edges are made with flared up for dense sprays flanging to the inner walls of the housing 1 spacer rings 6, the ends of which are attached to the bearing plate 7 and 8, one 7 of which is attached a stop screw 9 passing freely into the hole of the other plate 8, on both sides of which the stop screw 9 is screwed the nut 10 and 11 so that the nut 10 between the thrust plates 7 and 8 is screwed all the way into the plate 8 and the spacer ring 6 is pressed tightly to the inner walls of the housing 1 together with flared centripetal grating 3. The axis of the screw 9 is displaced inside the circumference of the spacer ring 6 and upwards relative to the horizontal plane to enable servicing of the nuts 10 and 11 in the top when installing the spacer ring 6 within centripetal grating 3. On 2 centrifugal and centripetal 3 lattice randomly strewn packing layer 12 optimal height, component 2,5 linear element size nozzles.

The liquid is fed into the column above the center layer of the nozzle 12 of the centrifugal grating 2 is t as follows.

Gas (vapor) enters the body 1 of the column from the bottom and moves upward, passes through the arched slot 5 centripetal partitioning grating 3 and the packing layer 12 on it, where in contact with the liquid rises above the packing layer 12 passes through the arched slot 4 centrifugal partitioning grid 2 and the packing layer 12 on it, where contact with the liquid and rises above the packing layer 12 under the upstream radial grating 3, and so on

The liquid flows from the top through the pipe 13 in the center above the packing layer 12 on the upper centrifugal partitioning the grid 2 and moves from the center to the periphery under the influence of the amount of flow of gas (steam) coming through the arched slot 4 at an acute angle to form from the center to the periphery and under the influence of slope forming a conical centrifugal lattice to the horizontal, the liquid partially performs a circular movement in a transverse direction with respect to the radial direction from the center to the periphery. In the peripheral part of the liquid flows down through the arched slot 4 centrifugal gratings 2 down on the packing layer 12 on centripetal lattices 3. The structure of the fluid flow in the nozzle layer on the centrifugal is mesheanii liquid on the layer height of the nozzle.

Similarly, in the packing layer 12 on the radial grating 3, the liquid moves from the periphery to the center, where flow through the arched slot 5 down on the packing layer 12 centrifugal grid 2. The structure of the fluid flow is close to the ideal model of displacement in the radial direction from the periphery to the center in the complete mixing of the liquid in the layer height of the nozzle. Because of the small volume of liquid flowing through the column under conditions of vacuum distillation fluid flow through the arched slots 4 and 5 on 2 centrifugal and centripetal 3 arrays.

To ensure the same average height of the liquid layer on centrifugal and centripetal gratings and the same hydraulic resistance of the liquid layer, and the same efficiency of mass transfer sections of the angle forming a conical radial gratings adopted two times greater than the centrifugal lattices, since the amount of liquid to centrifugal lattice is two times less than the centripetal lattice, judging by the amount of direct cone with height htoequal

< / BR>
and the volume of the funnel at its height hinequal

< / BR>
where

rto= rinhto= hinrto, rinis order centripetal grating 3 with the walls of the casing 1, it does not require special supporting elements, welded to the walls of the housing 1, which considerably reduces the cost of manufacture of the support means and the wall of the housing 1 remains smooth and unharmed.

Technical advantages of the invention are to increase the efficiency of mass transfer between the gas (vapor) and liquid due to changes in the patterns of fluid flow in the nozzle layer on centrifugal partitioning gratings in the direction of decreasing longitudinal mixing by increasing the radial component of the fluid velocity in the nozzle layer.

Socially useful advantages of the invention are to increase the efficiency of mass transfer sections with centrifugal grids and columns in General, increasing the purity and quality of the products of the separation, or in reducing the required reflux ratio for the separation of mixtures by distillation, resulting in reduction of heat consumption of rectification.

1 Vacuum Packed partitioned column comprising a vertical cylindrical casing, inside of which the height is in turn mounted centrifugal partitioning perforated grilles, made in the form of cones, oriented vespertilioninae lattice, made in the form of cones, oriented foundations upwards, tightly attached to the inner walls of the housing of the column, with the angle forming large 2 times, than for centrifugal grilles, perforated grilles are made in the form of arched slots protuberances up evenly spaced concentric circles, the axis of the arched slots in radial gratings oriented at an acute angle to form from the periphery to the center in the same direction, on each lattice disordered stacked layer of the nozzle, characterized in that that the axis of the arched slots centrifugal gratings oriented at an acute angle to form from the center to the periphery in the same direction, the layer height of the nozzles on each grid is 2.5 linear element size nozzles.

 

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