Perforated fabric for heat and mass transfer devices

 

The proposed perforated canvas belongs to the tray and Packed contact devices for holding heat and mass transfer processes and can be used in chemical, petrochemical, power and other industries. Perforated fabric includes sheet, fitted louvered slits. Data louvered slits are made in the sheet of a thickness not exceeding 1 mm, a width of S, 0.3-0.5 mm, in increments of not more than the thickness of the sheet, with the angleequal to 30-45the ratio of the gap length L to the width of S from 13 to 25, the direction louver channels to the horizontal axis of the coordinate angleequal to 30-45and the distance between the louver channels 1-2 mm. This design perforated fabric, working on contaminated, coking and polymerizable environments, improves the efficiency of mass transfer, extension of the range of stable operation, lower coefficient of heat transfer through the wall due to more uniform distribution of the gas phase through the holes of small cross section located between a relatively small distance. 1 Il.

The aim of the invention is the creation of a unified perforated blades for tray and Packed contact devices in heat and mass transfer processes ensuring a highly developed surface mass transfer and minimal surface heat transfer through the wall of the blade to be contaminated, cured and coked substances.

Known perforated blades for bubble cap, valve / tube sheet and plates with the living section 6 to 15% [1], [2], [3]. The disadvantage of these paintings is that the gas phase through the holes of relatively large cross-section moves at a speed of 5-7 m/s at right angles to the movement of the fluid flow with a certain level height, which leads to uneven distribution of gas flow and entrainment of the liquid droplet on the overlying plate. To address this shortcoming, the holes supplied by branch pipes with caps or valves of different configurations.

/ Tube sheet plates [1], [2] the entrainment of the liquid droplet is significantly reduced due to the small diameter holes (2-10 mm), located on the canvas with a step of 5-30 mm, respectively.

Under these conditions, the distance between Tarek the Noah stay volume of liquid on the plate with a relatively large surface heat transfer through the wall of a cloth leads to the formation of polymers, coke and accumulation of dirt [1], [2].

Known perforated blades for regular tips with round and slotted holes in the form of a rectangle and blinds[3], [4], [5]. The disadvantage of these paintings is that the holes are relatively large cross-sectional area and are located at a great distance from each other, which leads to increase the surface heat transfer through the wall. This leads to the violation of a film mode of mass transfer and uneven distribution of gas and liquid flows on perforated canvas and the deposition of their polymers, coke and dirt.

Close to the stated object is perforated canvas for scaly plates, includes slotted holes in the blinds section 505 mm, increments of 5050 mm and tilt the scales 15-20[1].

The disadvantages of this canvas is a narrow range of stable operation on gas load (optimal velocity of the gas through the cracks of 7-12 m/s) and a relatively large heat exchange surface through the wall of the blade.

Closest to the claimed object is perforated canvas for regular packing, made in the form of louvered grid with the edges of the blinds, the direction of the optimal geometrical dimensions of the perforations, providing a wide range of stable operation, advanced surface mass transfer and minimal surface heat transfer through the wall of the blade to be contaminated cured and coked substances.

The invention is aimed at creating a unified perforated blades for tray and Packed contact devices, providing a wide range of stable operation, advanced surface mass transfer and minimal surface heat transfer through the wall of the blade to be contaminated, cured and coked substances.

This is achieved by the fact that in the known perforated fabric, made in the form of louvered mesh, slotted louvered openings in the sheet of perforated blade thickness not exceeding 1 mm, made of a width S, 0.3-0.5 mm, in increments of not more than the thickness of the sheet, the angleequal to 30-45with respect to the length of the gap L to its width S from 13 to 25, the direction louver channels to the horizontal axis of the coordinate angleequal to 30-45and the distance between the louver channels 1-2 mm.

Sheet thickness not exceeding 1 mm, cheaper technology shocolate width louvered slits S, 0.3-0.5 mm, in increments of not more than the thickness of the sheet, with the angle of inclinationequal to 30-45and the ratio of the length of the gap L to its width S from 13-25. Width louvered slits, 0.3-0.5 mm, in increments of not more than the thickness of the sheet allows for uniform distribution of gas through the perforation of the fabric, thereby to provide a wide range of stable operation of tray and Packed contact devices with a highly developed surface mass transfer and minimum surface heat transfer through the wall. The angle of louvered slotsequal to 30-45reduces the entrainment of the liquid droplet on the upper leaf and allows to reduce the distance between the perforated canvases. The ratio of the length of the slit to a width of from 13-25 ensures that the failure of the fluid on the underlying canvas in a wide range of gas velocities and relatively high mechanical strength of the blade. Direction louver channels to the horizontal axis of the coordinate angleequal to 30-45allows to eliminate “dead zones” on the upper surface of the perforated cloth. Due to tangentia is their impurities, polymers and coke. The distance between the louvered channels 1-2 mm reduces the surface heat transfer through the wall while providing sufficient mechanical strength of the perforated cloth.

Optimal geometrical dimensions of the claimed perforated canvases were determined on a cold bench water-air for known devices [6] with the density change of the nozzle 14 to 80 m2/m3. The density of the nozzles 14 m2/m3corresponds to the disc device with the distance between the plates 70 mm, and a density of 80 m2/m3matches the regular nozzle.

Was tested on the well-known regular nozzles arranged in package[3], [4], [5] of vertically arranged on a triangular corrugated profile stated perforated sheet. The performance of the nozzle collected from the stated perforated sheet, not inferior to the famous.

The drawing shows the claimed perforated canvas.

Perforated fabric contains sheet 1 of a thickness not exceeding 1 mm, slotted cutting holes in the form of blinds 2 width S of 0.3-0.5 mm, in increments of not more than the thickness of the sheet, with the angleequal to 30-45, the ratio of length L to its https://img.russianpatents.com/chr/176.gif">to the horizontal coordinate axes, and the distance of 4 equal to 1-2 mm between the slotted louver channels 3.

Perforated fabric works as follows.

Evenly distributed fluid flows on the upper surface of the perforated cloth parallel to the axis Y. the Gas is below the lower surface of the perforated fabric and passes through the slotted cutting holes in the form of blinds 2 angleequal to 30-45and evenly distributed meets with the fluid flow at an angleequal to 30-45, which produce a fine mixture of gas with liquid highly developed contact surface phases, one of the main factors affecting the rate of mass transfer. This perforated canvas works in a wide range of speeds of 1.5-10 m/s through the perforation holes. At speeds above 10 m/s dramatically increases the hydraulic resistance of the canvas. Not condensed gas is delivered under the overlying perforated sheet and the liquid flows on the underlying canvas.

The use of the proposed unified perforated blades for heat and mass exchange devices running on giving range of stable operation, reduction in the rate of heat transfer through the wall due to more uniform distribution of the gas phase through the holes of small cross section located between a relatively small distance.

Sources of information

1. M. A. Tanatarov, M. N. Akhmetshina and other “engineering installations of oil refining, Chemistry, 1987, pages 76-80, UDC 665.63/67: 9.001.2 (075.8).

2. M. A. Berlin, B., Porechenkov, N. P. The wolves. “Processing of oil and natural gases, Chemistry, 1981, pp. 393-395, UDC 655.632.

3. The prospectus of the company “SULZER”, 22.13.06.40, 1993, prepared by the editorial Board of the journal “Chemical and petroleum engineering”, pages 8, 9, 10, 17.

4. Copyright certificate d, 01 D 53/20, publ. 30.06.81.

5. EP 0492802 A1, CL 01 J 9/32, publ. 01.07.92,

6. Patent for invention No. 2206392, 01 J 9/32 registered 20.06.2003,

Claims

Perforated fabric for heat and mass transfer device comprising a sheet provided with louvered slots, characterized in that the sheet of a thickness not exceeding 1 mm louvered slits are wide S, 0.3-0.5 mm, in increments of not more than the thickness of the sheet, with the angleequal to 30-45with respect to the length of the gap L to its width S 13-25, destination blinds>/img>and the distance between the louver channels 1-2 mm.

 

Same patents:

Regular nozzle // 2232632
The invention relates to structures designed to conduct heat and mass transfer processes in a variety of technological devices in the system, gas (vapor) - liquid, and can find application in chemical and other industries

The invention relates to contact devices for mass-transfer apparatus, in particular for Packed columns for gas - liquid

The invention relates to constructions of regular nozzles for heat and mass transfer apparatus

The invention relates to mass transfer devices column apparatus for liquid - liquid and can be used in petrochemical, chemical and other industries

The invention relates to mass transfer equipment used in absorption and distillation columns

The invention relates to constructions of regular nozzles designed to conduct heat and mass transfer processes in the gas(vapor) - liquid, and can find application in gas, petrochemical and other related industries

Multilayer nozzle // 2224590
The invention relates to the field of petrochemical and gas industry, in particular to the separation, the contact and separation nozzles of heat and mass transfer apparatus, and can be used in the processes of contact between phases, mainly in:

- gas-liquid separators,

the separators immiscible liquid mixtures, predominantly horizontal type

The invention relates to contact devices mass-transfer apparatus and may find application in gas, petrochemical and related industries in the implementation of mass transfer processes for gas-liquid, liquid-liquid, liquid-solid, for example by distillation, Stripping, washing, dissolving, mixing

The invention relates to contact devices for mass-transfer apparatus, in particular for Packed columns for gas-liquid

FIELD: chemical industry; fine gas separation from a liquid at reconstruction of separators and filter-separators of the absorbing and rectifying columns.

SUBSTANCE: the invention is dealt with the field of chemical industry and intended for fine separation of gas from a liquid at reconstruction of separators and filter-separators of the absorptive and rectifying columns. The multi-cartridge ring-type separating nozzle contains: a cover, a filtering unit, a device of water separation, an inlet connection pipe connected with the filtering unit by a pin, gas-distributing discs fixed to the pin. The filtering unit is made in the form of mesh cartridges mounted one on another. At that the internal surfaces of the mesh cartridges form a gas-distributing collector. The device of water separation is made in the form of the overflowing pipes located in the cartridges and mounted under them the drain pans with the axial apertures. Each mesh cartridge is supplied with a baffle made in the form of a plain disk with an axial aperture and a ring-type bead along the disc perimeter. Each mesh is formed by simultaneous winding of two parallel bands of the mesh, one of which is made out of a flat mesh, and the other - out of a corrugated mesh. On the side of its cylindrical internal surface a mesh cartridge is supplied with a cylindrical perforated shell. At that the first layers of the mesh band are fixed to the perforated shell by metal staples or welded to the perforated shell. At least two external layers of each mesh band are fixed by metal staples. The number of the mesh cartridges makes 6. The overflowing pipes are installed uniformly around the nozzle on a circumference, diameter of which makes from 0.85 up to 0.92 of the external diameter of the mesh cartridge and the diameter of a flow area of each overflowing pipe makes from 0.038 up to 0.05 of the external diameter of a mesh cartridge, and the total area of apertures of the shell perforation makes from 50 up to 60 % of the area of the internal cylindrical surface of the shell. In result the invention allows to increase efficiency of separation at the expense of prevention of the separated liquid accumulation in the cartridges of the nozzle.

EFFECT: the invention ensures increase efficiency of separation and prevention of the separated liquid accumulation in the cartridges of the nozzle.

2 cl, 1 dwg

FIELD: chemical industry; petrochemical industry; heat-and-power engineering and other industries.

SUBSTANCE: the invention is pertaining to distributing-contacting devices for the mass-exchange devices and may be used in chemical industry, petrochemical industry, heat-and-power engineering and other branches of industry. The distributing-contacting device contains a distribution plate supplied with a screen with holes, overflow branch-pipes, overflow devices, deflecting shields, perforated truncated cones. The perforated truncated cones are made out of a sheet of no more than 1 mm thick with shutter-type splits of a width -"S" equal to 0.3-0.5 mm, and with a step not exceeding the thickness of the sheet and with an inclination in direction of the liquid motion at an angle α equal to 30-45°, the ratio of the length "1" to its width "S" is from 13 up to 25, a direction of the shutter channels to the horizontal axis of coordinates is at an angle β is equal to 30-45° and the overflow branch-pipes. At that for the packed columns on the ends of the drain branch-pipes at the calculated space intervals there are spray washers, and for plate-type columns the liquid from the drain branch pipes is fed onto an underlying sheet of a plate through a hydraulic lock. The presented distributing-contacting device ensures a high efficiency of the mass-exchange parameters in a wide range of a stable operation of packed columns and in the plate column apparatuses.

EFFECT: the invention ensures a high efficiency of the mass-exchange parameters in a wide range of a stable operation of the packed columns and the plate column apparatuses.

3 cl, 3 dwg

FIELD: petrochemical industry; oil-refining industry; chemical and other industries; devices for realization mass-exchange processes in the column apparatuses.

SUBSTANCE: the invention is pertaining to the devices for realization of mass-exchange processes in the column apparatuses used both in the systems of a liquid-liquid type and in the systems of a vapor-liquid type and may be used in petrochemical, oil-refining, chemical and other industries. The mass-exchange head includes a row of rectangular platesinclined to each other at an angle with a flanging towards to each other in the upper part of the plates. The rectangular plates of no more than 1 mm thick are made with a perforation in the form of a louver gauze, in which the slit louver holes have a width S equal to 0.3-0.5 mm and with a step equal to no more than the thickness of the plates, with an inclination at an angle α equal to 30-45°, the ratio of the plate length 1 to its width S - from 13 up to 25, a direction of the louver channels to the horizontal axis of coordinates at an angle β equal to 30-45° and with the spacing interval between the louver channels of 1-2 mm. The flangings are facing each other are connected among themselves without a clearance and form a blind bin with the overflow slats in height of no less than the values of a water seal. The inclined rectangular plates with the perforation in the form of a louver gauze in vertexes of the lower angles are connected by the blind plates, which form among themselves a drain branch pipe dipped into the blind bin with the overflow plates of the below lying row of the inclined plates. The advantage of the offered design of the mass-exchange head is expansion of the range of its stable operation at a high efficiency of the mass exchange both in the systems of the liquid -liquid type and in the systems of vapor-liquid type.

EFFECT: the invention ensures expansion of the range of the mass-exchange head stable operation at a high efficiency of the mass exchange both in the systems of the liquid -liquid type and in the systems of vapor-liquid type.

2 cl, 5 dwg

FIELD: separation.

SUBSTANCE: method comprises uniform distribution and supply of gas-liquid mixture to the structurized members with macroscopic and microscopic structures, impregnating the surface of the members with the liquid to be separated, collecting liquid on the surfaces of the structures, and discharging liquid and gas separately. The liquid in gas phase is converted into the liquid phase by reaching the phase thermodynamic equilibrium of the mixture.

EFFECT: enhanced efficiency.

3 cl, 3 dwg

FIELD: oil and gas industry.

SUBSTANCE: regular nozzle comprises stack of sheets provided with sloping corrugations or projections. The perforated members are interposed between the sheets. The sheets and/or the perforated members interposed between them are provided with flow swirlers that define perforation. The axes of the swirlers are vertical. The swirlers can be defined by woven grid. The members may be provided with corrugations that intersect with the corrugations or projections on the sheets. The corrugations of the members are smaller than corrugations or projections on sheets. The swirlers are made of slots, and members are interposed between the sheets in pair.

EFFECT: enhanced efficiency.

4 cl, 10 dwg

FIELD: petrochemical industry; equipment for separation and the mass-exchange apparatuses.

SUBSTANCE: the invention is pertaining to the field of petrochemical industry, in particular, to the regular nozzle for the separation and mass-exchange apparatuses. The regular nozzle for separation and the mass-exchange apparatus is pertaining to the designs of the regular nozzles intended for realization the heat-mass-exchanging and separation processes in the system gas (steam)-liquid. The nozzle contains the turned relatively to each other packets of the sheets with the slant corrugations or the porous prominences crossing in the adjacent sheets. At that and the porosity of the prominences and/or the sheets in the packets is diminishing in the nozzle towards the gas outlet. Besides the prominences and/or the sheets of the packets are made on the gas inlet into the nozzle out of the hydrophilic material, and on the outlet of the nozzle - out of the liophilic material, and the ratio of the pores sizes of the prominences and/or of the sheets of the packets on the inlet and the outlet of the gas are proportional to ratios of the surface tension of the separable liquids in the power of 0.5. The invention allows to up-grade efficiency of the processes of the heat-and-mass exchange and separation by reduction of carryover of the liquid with the increased gas productivity.

EFFECT: the invention allows to up-grade efficiency of the processes of the heat-and-mass exchange and separation by reduction of carryover of the liquid with the increased gas productivity.

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

Up!