Structured packing module for mass exchange column and method of its application

FIELD: process engineering.

SUBSTANCE: structure packing module with crosswise arrangement of crimps for mass exchange or heat exchange columns to be operated at heavy fouling caused by scale and erosion. Proposed module comprises multiple vertical corrugated plates extending in parallel. Spacers are used for retaining crimps of adjacent plates at definite spacing to decrease possibility of solid particles accumulation at plate surface. Besides, said plates have no orifices nor machined surfaces that can up the accumulation of solid on plates.

EFFECT: perfected design.

20 cl, 4 dwg

 

The prior art INVENTIONS

The present invention relates in General to apparatus and method for facilitating contact of the vapor-liquid or liquid-liquid in the columns, in which mass or heat transfer. More precisely, the present invention relates to a structured Packed modules for use in mass - or heat exchange columns and method of use of such modules in relation to the hard conditions that are clogging, fouling and erosion.

Many types of disordered and structured Packed items were developed for use in the columns of a mass transfer or heat exchange to improve contact between the fluid-fluid flowing in the column. Packed items, mainly improve the mass transfer and heat transfer by providing surfaces on which the fluids are distributed to increase the area of contact between the descending and ascending currents of fluid.

Nozzle elements are often used in harsh operating conditions in which the problem is clogging, fouling and erosion of the Packed items. Optimally, supplementary elements used in such harsh operating conditions, must have adequate structural strength to videri the AMB erosion and sudden failures of the column, such as the emission of steam. Packed items should also provide structural geometry, which allows to achieve the desired separation efficiency. At the same time Packed items should be a fairly open area, or be so designed as to avoid contamination and occurrence of fouling due to accumulation of solid particles on the surface of the Packed items. Many varieties of known nozzles have the necessary strength and performance characteristics, but are prone to clogging and the emergence of soot in such harsh operating conditions. Similarly, other known types of nozzles are resistant to clogging and the emergence of a burn, but do not provide the required strength or efficiency of the separation. Thus there is a need for the development of structured Packed modules that provide the required structural strength and the efficiency of the separation, at the same time resistant to clogging and the emergence of soot.

The INVENTION

In one embodiment, the invention provides a structured Packed module that contains many vertical parallel corrugated plates arranged with the corrugations of adjacent plates and passing crosswise. Use the I remote spacers to hold the plate at a certain distance from each other relative to the corrugations of adjacent plates along their entire length so that to one corrugation had no contact with others. The space between the corrugations of adjacent plates are fully open to the flow of fluid, usually steam rising, and the surface of the wafer, thus, provide a free surface flow for a fluid medium, usually descending liquid. Thus the plate is resistant to clogging and the emergence of soot and also have the ability to provide the required strength and efficiency of the separation.

In other embodiments, implementation of the invention provides a column containing a structured Packed module, and the way in which structured Packed module is used to improve mass transfer and/or heat transfer between the flows of fluid passing through the column. In the way the flow of the fluid is essentially uniform along the paths for flow formed corrugations of the plates due to the presence of areas of low yield strength, which is probably due to the corrugations of adjacent plates are in contact with each other, or other structural elements. The method is not prone to clogging and the emergence of soot due to the absence of these types of areas of low yield strength. The method can thus be implemented in a tough operating conditions, which is usually clogged, the occurrence of fouling and erosion of the plates were the s problem.

BRIEF DESCRIPTION of DRAWINGS

Figure 1 is a partial view of the column with the casing of the column cross-section vertical to the image of structured Packed modules according to the present invention located inside the column;

Figure 2 is a view of the top of the column along the line 2-2 figure 1 in the direction of the arrows;

Figure 3 is a side view of one of the structured Packed modules; and

Figure 4 is a partial top view depicting two options for the implementation of the corrugated plates, which can be used in structured Packed modules.

DETAILED description of the INVENTION

Referring now more in detail to the drawings and first to figure 1, column suitable for use in the processes of mass transfer and heat transfer, denoted by the reference position 10. Column 10 includes a vertical outer casing 12, which in General have a cylindrical configuration, although other configurations are possible, including polygonal, and are within the scope of the present invention. The casing 12 is of any suitable diameter and height, and made of one or more solid material, which is preferably inert or, in other words, compatible with fluids and conditions occurring during operation of the column 10.

Column 10 presents yet a type of columns, used for processing streams of fluid, usually the flow of liquid or steam, to produce separation and/or in other words, the implementation of mass transfer or heat exchange between the flows of fluid. For example, column 10 may be a column, in which atmospheric distillation of crude oil, vacuum distillation of crude oil and fuel oil, catalytic cracking in a fluidized bed, thermal cracking, coking, visbreaking, cleaning the coke reactor purge gas by cooling the gas, Devdariani edible oils, cleaning collected from the surface of the oil, and other processes occurring in tough operating conditions.

The casing 12 of the column 10 forms an open interior region 14, in which occur the required mass transfer and/or heat transfer between the flows of fluid. Typically, the flow of fluid contain one or more upward flow of steam and one or more of the descending liquid streams. Alternative streams of fluid can contain upward and downward flow of liquid or ascending gas stream and a descending liquid stream.

The flow of fluid is directed into the column 10 through any number of feed lines (not shown)located appropriately on the height of the column 10. One or more streams of steam can also be educating the Ana within the column 10, and not introduced into the column 10 through the feed piping. Column 10 also typically will contain the top line (not illustrated) for removing vaporous products or by-products and the lower gate line (not shown) for removal of liquid product or by-product from the column 10. Other components of the columns that are normally present, such as the return line phlegmy, reboiler, coolers, evaporators, dividers liquid, etc. are not depicted in the drawings, as they are known, and the image of these components is not necessary for understanding the present invention.

In accordance with the present invention one or more layers 15a-d structured Packed modules 16 are located within the open interior area 14 of the column 10. Referring additionally to figure 2-4, each structured Packed module 16 contains a number of vertical, parallel to the ongoing corrugated plates 18 made from an appropriate rigid material, such as any metal, plastic, or ceramic, having sufficient strength and thickness to withstand erosion and other conditions to which they are exposed inside the column 10.

As can be seen in figure 4, the corrugations along the entire surface of the plates 18 and, in General, have a triangular or sinusoidal in poperen the m section. The corrugations of adjacent plates 18 each structured Packed module 16 are crosswise or transversely. The angle of the corrugations relative to the vertical axis of the column 10 may be selected in accordance with the requirements of the specific application. For example, can be used angles of 30, 45 or 60 degrees, or other angles.

If the corrugations of adjacent plates 18 each structured Packed module 16 have the opportunity to contact each other, the contact point would provide a region of low yield strength where it is most preferable accumulated solid particles, leading to the formation of pollution and soot. Thus the corrugations of adjacent plates 18 each structured Packed module 16 are separated from each other along their entire length by means of remote spacers 20, which are attached to the plates 18. Remote spacers 20 are made in order to keep the distance between adjacent plates 18 along their entire length and width to ensure the smooth flow path for the fluid, usually liquid, descending along all surfaces of the plates and the fluid, usually steam, bubbling in the open space between the plates 18. The corrugations of adjacent plates 18 form the inclined flow channels for the rising steam. Due to the fact that the connecting plate 18 is not in contact with each other is d, or other elements, the flow of liquid and vapor along the plates 18 in General homogeneous without the presence of areas of low yield strength, which could lead to the accumulation of solid particles on the plates 18 and result in clogging and accumulation of deposits on the plates 18.

Remote spacers 20 can be of various appropriate forms. In the depicted embodiment, remote spacers 20 are a series of smooth rods 22, which run along the top and bottom edges of structured Packed modules 16 in General perpendicular to the plates 18. The rods 22 can pass through or be recessed into the holes 24 formed on the edges of the plates 18 so that they do not prevent contact between the upper edges of the plates 18 one structured Packed module 16 and the lower edges of the plates 18 located above the other structured Packed module 18. The rods 22 may be circular, triangular, square or other desired cross section. Holes 24, which holds the rods 22 may be made in the form of slots, and full of holes, and similarly may have a round, triangular, square or other desired shape. Remote spacers 20 is to hold together the plates 18 each structured Packed module 16 and holding adjacent plates 18 to require the PTO distance between corrugations. You must understand that the implementation of these functions can be used with other types of remote spacers 20 and rods 22. It is implied and included in the scope of the present invention. It is desirable, however, to remote spacers 20 were made and attached to the plate 18 thus, to reduce the possibility of accumulation of solid particles on the remote spacers 20 or at the points of their attachment to the plates 18.

The angle Φ of the bend (flute) (figure 4) and the height h2(figure 4) or the amplitude of the corrugation in each plate 18, as well as the spacing between adjacent plates 18 each structured Packed module 16, may vary for specific applications. When the flute height of the corrugation increases, the number of plates 18, which can be located on the cross-section of the column 10, is reduced. Similarly, when the spacing between the plates 18 increases, the number of plates 18, which can be located across the area of the cross section of the column 10, is reduced. In General, when the number or surface area of the plates 18 is increased, the efficiency of the processes of mass transfer or heat transfer also increases. At the same time, however, the drop in pressure between the upper and lower ends of structured Packed modules 16 increases, and the power of the fluid flow is strukturirovannykh Packed modules 16 is reduced.

The likelihood that solid particles will accumulate on the surfaces of the plates 18 also increases when decreasing the radius of curvature of the peaks of the corrugation. Thus in harsh environments, where the clogging and fouling, in General, it is desirable to reduce the radius of curvature of the plate 18 to reduce the possibility of accumulation of solid particles on the plates 18, in this case, choosing the bending angle and the height of the corrugation and the distance between adjacent plates so as to provide the desired pressure drop and capacity of the fluid flow for a structured Packed module 16.

Each layer 15a-d structured Packed modules 16 may consist of a single structured Packed module 16, which passes completely over the entire cross section of the column 10 and is held on a support ring (not shown)attached to the casing 12 columns, the underlying nozzle module 16, or other appropriate support structure. Alternatively, many individual structured Packed modules 16 in the form of briquettes can be collected for the education of one or more layers 15a-d. Each structured Packed module 16 is usually laid directly on the adjacent underlying structured Packed module 16 and is normally rotated so that the corrugated plates is 18 in one layer was located in vertical planes, which is inclined relative to the vertical planes formed by the corrugated plate 18 adjacent layer. This angle is typically 45 to 90 degrees, but if you can have a different value.

All the surface of the wafer 18 in General smooth and does not have a surface texture and holes (other holes than the holes 24 that are used to hold the rods 22 in the plate 18), which can allow solids to accumulate on the plates 18. Spray nozzles (not illustrated) may be located above and/or below the modules 16 for directing a spray of liquid on the surface of the wafer 18 to remove or prevent the accumulation of solid particles on the wafer 18. In order to allow the spray to reach the entire surface of the wafer 18, the modules 16 can be performed with a vertical height of about 2 and 7/8 inches. In other applications of structured Packed modules 16 may have a height of about 6 or more inches. In applications where the solid particles in the feed flow of the fluid could lead to clogging of the spray nozzles or known flow control valves of the fluid, which serves the fluid modules 16 may be used overflow flowing liquid distributor.

In practice, one or more structured density of CNY module 16 is in the open interior area 14 of the column 10 to be used to improve mass transfer and/or heat transfer between the flows of fluid, current to flow in the column 10. As soon as the flow of the fluid collide with the plates 18 in one or more structured Packed module 16, the flow of fluid irrigates the surface of the wafer 18 to increase the contact area and, thus, mass transfer and/or heat transfer between the flows of fluid. Because of the corrugations of adjacent plates 18 are located at a distance from each other, the flow of fluid, usually a liquid stream, is able to descend along the inclined surface of the corrugations in General evenly without delay zones of low yield strength, which usually appear when the corrugations are in contact with each other or other structural elements along their length. Another flow of fluid, usually steam flow, also has the ability to rise in the open space between the plates 18 are essentially evenly without delay in areas of low yield strength, which could occur if the corrugations were in contact with each other or other structural elements along their length. Thus, structured Packed modules 16 provide the required structural strength and efficiency of separation, and being resistant to clogging and the formation of soot.

Given the above, it can be seen that this invention is one of the fully adapted to access the supply of all aspects and tasks the above, together with other advantages which are inherent in this design.

It should be clear that can be used specific signs and podnominatsii, and can be implemented without reference to other features and podnominatsii. It is implied and included in the scope of this invention.

As there may be many embodiments of the invention without departure from its scope, it is necessary to understand that all the material presented here or illustrated in the attached drawings may be considered as illustrative and not restrictive.

1. Structured Packed module, containing:
lots of vertical, parallel plates having corrugations, and the plates are arranged so that the corrugations of adjacent plates are crosswise; and
remote spacers that hold the plate at a distance relative to the corrugations of adjacent plates from each other essentially along the entire length of the corrugations so as to form a primarily free flow path for the fluid along the surface of the wafer and in the open space between the plates.

2. Structured nozzle module according to claim 1, in which the corrugations along the entire surface of each plate.

3. Structured nozzle module according to claim 1, in which the surface of the wafer is the tsya smooth and in General has no texture.

4. Structured nozzle module according to claim 1, in which the distance spacers contain rods passing through the plate.

5. Structured nozzle module according to claim 4, in which the plates have upper and lower edges, and the aforementioned rods pass through the above-mentioned upper and lower edges.

6. Structured nozzle module according to claim 5, in which the above-mentioned plates have holes on the aforementioned upper and lower edges, and the aforementioned rods pass through the aforementioned holes.

7. Structured nozzle module according to claim 6, in which the aforementioned surface of the wafer contains no holes except for the above-mentioned upper and lower edges.

8. Structured nozzle module according to claim 7, in which the above-mentioned rods are smooth and have a circular cross-section.

9. Structured nozzle module according to claim 7, in which the above-mentioned rods are welded to the aforementioned plates.

10. Column for mass transfer or heat exchange, comprising:
the casing, forming an open interior region; and
structured Packed module, located above the open internal region, and the above-mentioned structured Packed module contains:
lots of vertical, parallel plates, meusinger, the plates are arranged so that the corrugations of adjacent plates are crosswise; and
remote spacers that hold the plate at a distance relative to the corrugations of adjacent plates from each other essentially along the entire length of the corrugations so as to form in common a free flow path for the fluid along the surface of the wafer and in the open space between the plates.

11. The column of claim 10, in which the surface of the wafer is flat and mostly do not have a texture.

12. The column of claim 10, in which the distance spacers contain rods passing through the plate.

13. The column indicated in paragraph 12, in which the plates have upper and lower edges, and the aforementioned rods pass through the above-mentioned upper and lower edges.

14. Column in item 13, in which the above-mentioned plates have holes on the aforementioned upper and lower edges, and the aforementioned rods pass through the aforementioned holes.

15. Column by 14 in which the aforementioned surface of the wafer does not contain holes, except for the above-mentioned upper and lower edges.

16. The column indicated in paragraph 15, in which the above-mentioned rods are smooth and have a circular cross-section.

17. The column indicated in paragraph 15, in which the above-mentioned rods are welded to the aforementioned plates.

18. The way to ensure mesopore the OSA and/or heat transfer between the flows of fluid, flowing in the column mass transfer containing structured Packed modules located in an open internal region, forming the casing of the column, and the above-mentioned structured Packed module contains a number of vertical, parallel plates having corrugations, and the plates are arranged so that the corrugations of adjacent plates are transversely and spaced along their length, the method provides the stage on which pass above the flow of fluid through the above-structured Packed modules on ways to stream formed of the above-mentioned corrugations for implementation of the above mass transfer and/or heat transfer on the surfaces of the above-mentioned plates.

19. The method according to p, including the stage at which perform essentially uniform over the above-mentioned flow of the fluid along the aforementioned path for the stream.

20. The method according to claim 19, in which the phase of the transmission flow of fluid through structured Packed modules includes the transmission of the downward fluid flow and the upward flow of vapor through structured Packed modules.



 

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3 cl, 1 dwg

FIELD: oil-processing industry; chemical industry; production of the spiral heads for the heat-mass exchanging and simultaneous with them reaction processes.

SUBSTANCE: the invention is mainly pertaining to the oil-processing industry and chemical industry. The spiral head made in the form of the sequential rows of the spirals is installed in the packet in parallel to each other and to the flow in compliance of the dense location scheme. The adjacent and sequential spirals may be of the similar or counter rotation type. The sequential spirals are not necessary coaxial. Such location allows to form the oncoming or following movement of flows between the parallel spirals, that increases the turbulization and promotes stabilization of distribution of the dispersion particles according to their section and also to optimize selection of the design of the packet for the particular conditions of the process. The invention provides for manufacture of the layers of the spiral head by the strain of sheets, that makes it possible to organize its mass production in the wide range. Uniqueness of the spiral head ensures the effective interaction of the phases in their three possible relative movements: the direct-flow, the counter flow and the pseudo-liquefied flow.

EFFECT: the invention ensures manufacture of the layers of the spiral head by the strain of sheets, that that makes it possible to organize its mass production in the wide range and the effective interaction of the phases in their relative movements - the direct-flow, the counter flow and the pseudo-liquefied flow.

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.

SUBSTANCE: the invention is pertaining to the devices for realization of the mass-exchange processes in the gas (vapor)-liquid systems, in particular, to the absorption and to the rectifying columns and may be used in the natural gas industry, il-refining industry, chemical industry. The regular overflow head contains the packed solids made out of the punching-drawn perforated sheets. The punching-drawn perforated sheets are made rectangular and bent along the longitudinal axis of the symmetry in the form of the small corners with the apex angle making from 110° up to 130°. The small corners are arranged with their peaks upward and laid in the staggered order one over another in the horizontal rows in the framework with formation of the packed-column block module. The small corners shelves edges of the above located row are connected with the apexes of the corners of the below row. In the shelves of the small corners and along the corners shelves edges there are the perforated section-shaped holes arranged uniformly in the staggered order along the whole area of the corners shelves. Above the holes there are the salient cone-shaped visors and their peaks on each of the corners shelves are facing the same direction in parallel to the corner shelf bent line. The mass-exchange column contains the packing block modules mounted one above another in the central part of the body. In the body the horizontal segment-shaped baffle plate are mounted. At that the baffle plates are arranged along the corners of packing modules on the opposite sides of the framework with formation of the zigzag-shaped channel of the multipath crisscross stream of the vapor. As the result of it the invention allows to increase effectiveness and productivity for the gas (vapor) in the mass-exchange column in conditions of the low loading by the liquid, to expand the range of the stable operation of the column as a whole.

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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