Annular packing regular arrangement

FIELD: process engineering.

SUBSTANCE: invention relates to absorption, rectification, oil processing and gas cleaning. Proposed method comprises laying said packing in horizontal lines along concentric circles with rings of every other line shifted relative to previous one. Note here that every element of said packing in bottom layer in one concentric circle is shifted relative to that in upper layer by: s=(d+b)/2, where b is clearance, d is packing OD. Note here that packing elements with identical spacing alternate in height in a line, being laid with spacing equal to: b=2δ+B, where δ is thickness of fluid film flowing over packing, B=3÷4 is minimum distance between fluid films of thickness δ flowing over the surface of packing adjacent elements.

EFFECT: increased effective surface, higher efficiency of heat-and-mass transfer, lower drag.

2 dwg, 2 ex

 

The invention relates to a method of conducting processes of absorption, distillation, processes of oil refining and gas treatment.

Known regular styling, including containers with perforated top and bottom walls and are regularly stacked ring process (SU # 880454, B01D 53/20).

The disadvantage of such installation is to reduce the efficiency of the process of heat and mass transfer due to the formation of stagnant zones (meniscus) at the contacts adjacent to each other elements of the nozzle.

The closest in technical essence and the achievement of result to the invention' is the regular way of laying the nozzle of the Raschig rings in the contact apparatus in which the ring process have horizontal rows of concentric circles close to each other with offset rings of each series relative to the previous SU # 316458, 3/28 B01D).

The disadvantage of this method is to reduce the efficiency of the process of heat and mass transfer due to the formation of stagnant zones (meniscus) at the contacts adjacent to each other elements of the nozzle. Also, this phenomenon leads to unnecessary increase of the hydraulic resistance.

The objective of the invention is to intensify the process of heat and mass transfer with simultaneous reduction of hydraulic resistance, as well as to increase the effective surface the nozzle.

This technical result is achieved due to the fact that each element of the nozzles in the underlying layer in the same concentric circle with respect to each element of the nozzle in the overlying layer is located at an offset equal to:

s=(d+b)/2,

where b, mm - the size of the gap, d, mm - outer diameter of the nozzle.

moreover, the elements of the nozzles with the same location in the row are interleaved through a series of height, and elements of the nozzles are stacked relative to each other in each layer with a gap equal to

b=2δ+

where b, mm - gap, δ, mm is the thickness of the film of liquid flowing through the nozzle; b=3÷4 mm minimum distance between the liquid films of thickness δ, flowing down on the surface of the adjacent elements of the nozzle.

This interval is due to the fact that when using<3 mm may lead to adhesion of the films,>4 mm leads to a decrease of the active surface by reducing the number of Packed items.

The film thickness of the liquid - δ is determined by the following criterial equations:

for laminar film flow, ReW<1600:

where νW- kinematic viscosity, m2/s; g - gravitational acceleration, m/s2; ReWthe Reynolds number for the liquid film;

for turbulent flow of liquid film at 1600≤RWthe 30000:

In turn, the Reynolds number for the liquid film is calculated by the formula:

,

where q is the linear density of irrigation, m3/(m·s); νW- kinematic viscosity, m2/s

Figure 1 shows a column with a circular nozzle, laid under the proposed method, the cross-section; figure 2 is a longitudinal section of the packing ring packing in the column.

A column apparatus 1 is filled in the annular nozzle 2 of diameter d and height h, each element 3 of the nozzle 2 in the underlying layer in the same concentric circle with respect to every item 4 of the nozzle 2, and the upper layer is located at an offset equal to s, and the elements of the nozzle 2 with the same location in the row are interleaved through a series of height, and the elements 4, 5 of the nozzle 2 are stacked relative to each other in each layer with a gap b.

The method according to the invention is as follows.

Example 1. Liquid phase - water fed evenly in a column apparatus 1 on attachment 2 - ring process dimensions 50×50×5 mm, laid proposed method, and flows down on the surface in the form of a thin film and trickles of fluid in contact with the ascending gas stream containing CO2. The flow regime of the liquid film on the nozzle is laminar, the Reynolds number for plank the fluid Re W=1500. The kinematic viscosity of the fluid 1,004·10-6m2/s

The thickness of the liquid film flowing over the surface elements of the nozzle 2, is calculated by the formula:

I.e. the thickness of the liquid film flowing down along the surface of the elements nozzles, 2 δ=0,5 mm

The elements 4, 5 of the nozzle 2 are stacked relative to each other in each layer with a gap equal to:

b=2δ+

where b, mm - gap, δ, mm is the thickness of the film of liquid flowing through the nozzle; b=3÷4 mm minimum distance between the liquid films of thickness δ, flowing down on the surface of the adjacent elements of the nozzle.

That is, the magnitude of the gap between the elements 4, 5 nozzles b=2·0,5+4=5 mm

Each element 3 of the nozzle 2 in the underlying layer in the same concentric circle with respect to every item 4 of the nozzle 2, and the upper layer is located at an offset equal to:

s=(d+b)/2,

where b, mm - the size of the gap, d, mm - outer diameter of the nozzle.

I.e. the amount of displacement between the elements 3 and 4 nozzles 2 s=(50+5)/2=27,5 mm

Example 2. Liquid phase - water fed evenly in a column apparatus 1 on attachment 2 - ring process dimensions 50×50×5 mm, laid proposed method, and flows down on the surface in the form of a thin film and trickles of fluid in contact with the ascending gas stream containing CO2. The flow regime of the liquid film on the nozzle - turb the Lenten, at this Reynolds number for the liquid film, RW=15000. The kinematic viscosity of the fluid 1,004·10-6m2/s

The thickness of the liquid film flowing down along the surface of the elements of the nozzle 2 is calculated by the formula:

I.e. the thickness of the liquid film flowing over the surface elements of the nozzle, δ=1,7 mm

The elements 4, 5 of the nozzle 2 are stacked relative to each other in each layer with a gap equal to:

b=2δ+

where b, mm - gap, δ, mm is the thickness of the film of liquid flowing through the nozzle; b=3÷4 mm minimum distance between the liquid films of thickness δ, flowing down on the surface of the adjacent elements of the nozzle.

That is, the magnitude of the gap between the elements 4, 5 nozzles b=2·1,7+4=7,7 mm

Each element 3 of the nozzle 2 in the underlying layer in the same concentric circle with respect to every item 4 of the nozzle 2, and the upper layer is located at an offset equal to:

s=(d+b)/2,

where b, mm - the size of the gap, d, mm - outer diameter of the nozzle.

I.e. the amount of displacement between the elements 3 and 4 nozzles 2 s=(50+7,7)/2=28,85 mm

The spacing of adjacent elements avoids merging films (thin liquid)flowing over the surface of the nozzles and the formation of stagnant zones (Minsk), which ensures an increase in the active surface of the nozzle, participating in the process of heat and mass the exchange of ~30%, the uniform distribution of gas-liquid flow, thereby increasing the efficiency of the process of heat and mass transfer.

The technical result that can be obtained from the use of this invention is to improve the efficiency of the process of heat and mass transfer, the increase of the effective surface of the nozzle. An additional positive effect is a decrease in hydraulic resistance.

The way regular packing ring packing in the contact apparatus with the arrangement of horizontal rows of concentric circles with offset rings each subsequent number in relation to the previous, wherein each element of the nozzles in the underlying layer in the same concentric circle with respect to each element of the nozzle in the overlying layer is located at an offset equivalent to:
s=(d+b)/2,
where b is the magnitude of the gap, d is the outer diameter of the nozzle, mm,
moreover, the elements of the nozzles with the same location in the row are interleaved through a series of height, and elements of the nozzles are stacked relative to each other in each layer with a gap equal to:
b=2δ+B,
where b is the magnitude of the gap, mm, δ - thickness of the liquid film, mm, flowing through the nozzle, b=3÷4 mm minimum distance between the liquid films of thickness δ, flowing down on the surface of the adjacent elements of the nozzle.



 

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11 cl, 22 dwg

FIELD: natural gas industry; oil-refining industry; chemical industry; devices for realization of the mass-exchange processes in the gas(vapor)-liquid systems.

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EFFECT: the invention ensures the increased effectiveness and productivity for the gas (vapor) in the mass-exchange column in conditions of the low loading by the liquid and to expand the range of the stable operation of the column as a whole.

4 cl, 5 dwg

FIELD: chemical industry; petroleum industry; natural gas industry; other industries; production of the nozzles used in the processes of the natural gas rectification, absorption, purification and dehydration.

SUBSTANCE: the invention is pertaining to designs of the regular nozzles, which are used in the processes of the natural gas rectification, absorption, purification and dehydration and also as the mixers of the liquid and gaseous streams as the separators of the phases in the separation devices, as the contact elements in the condensers of mixing, as the sprinklers of the water cooling towers and may find usage practically in all production processes in petroleum, gaseous, chemical and other allied industries. The regular nozzle consists of the corrugated plates gathered in packages installed vertically and in parallel with the inclination of the flutes of the adjacent sheets to the horizon in the opposite sides, contacting by the protruding flutes to each other and forming among themselves the free channels of the complicated geometrical form. The nozzle is supplied with the spacers made in the form of the block of the horizontally laid in the rows in parallel to each another volumetric components. At that the symmetry axes of the components laying in the adjacent in height rows are mutually perpendicular. The ratio of the height of the package consisting of the corrugated sheets to the height of the spacer block lays within the limits of 2-5. The total height of the block of the spacers lays within the limits of 1.0-4.0 equivalent diametersof one component. The equivalent diameter of channels of the corrugated sheets package and the equivalent diameter of the component of the block of the spacer are in the ratio of 0.4-0.8. The components of the block of the spacer represent the solids of revolution, which are made in the form of the multiple-thread helicoids, at that the number of the threads makes 2-4. The components of the spacer block are laid in the rows with the clearance to each other, at that the interval, which separates the symmetry axes of the adjacent components makes 1.7-2.5 diameters of one component. The invention allows to raise intensity of the processes of the heat- and mass-exchange due to turbulization of the gas streams and redistribution of the liquid.

EFFECT: the invention ensures the increased intensity of the heat-exchange and mass-exchange processes due to turbulization of the gas streams and redistribution of the liquid.

4 cl, 2 dwg

FIELD: separation of materials.

SUBSTANCE: nozzle comprises stacks made of vertical sheets provided with projections that define the sloping passages between the sheets for flowing the phases. The sheets of at least one pair of the stacks are coated with porous belts made of polymeric materials. The porous belts are connected with a source of positive charges.

EFFECT: enhanced efficiency.

3 cl, 4 dwg

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