Process and reactor for performing heat exchange reactions

FIELD: heating systems.

SUBSTANCE: invention refers to physical and chemical process technology, namely to process and reactor for performing heat exchange reaction. Heat exchange reaction performing process involves reagent flow supplied to catalytic material layer, which is located for example outside one heat transfer tube with double walls in heat exchange reactor, contact of reagent flow to catalytic material at indirect heat exchange with medium-heat carrier available in annular volume of at least one heat transfer tube with double walls; at that, in annular volume there installed is one or more bracing elements forming spiral flow path of medium-heat carrier around internal heat exchange tube at least of one heat exchange tube with double walls. Invention also includes heat exchange reactor for carrying out the above reaction.

EFFECT: improving heat transfer at carrying out heat exchange reaction.

10 cl, 13 dwg

 

The invention relates to a technology of carrying out physico-chemical processes, in particular to a process and reactor for the reaction of heat transfer.

The level of technology

For carrying out the reaction heat can be used, for example, reactors with dual pipes. Heat-exchange reactor with double pipes are well known in the field of chemistry (see, for example, ROEMPPS CHEMIE-LEXIKON, vol.6, 8 ed., 1988, str). Such reactors are especially useful when you want to provide indirect heat exchange to transfer or heat dissipation in a specific reaction or from it.

Device with dual pipes in its simplest form, consists of an inner tube mounted inside the outer tube, resulting in the space between the tubes is formed an annular volume. Proper placement of the inner pipe within the outer pipe is a very important factor for the effective functioning of the double pipe. In many cases, the best function is achieved with the installation inner tube in the center inside of the outer tube, but in other cases more efficiently asymmetric placement of the inner tube. In all cases, use spacers to ensure correct positioning of the two tubes relative to each other. The function of the spacers is in the fixing position of the inner tube in cross section relative to outwardly the pipe, when freedom of movement between pipe in the longitudinal direction.

Devices with dual pipes have several options for use in chemical reactors. One such use case is to use a reactor with a double pipe in which the fluid - fluid flows in the annular volume of double pipe heat transfer, with such fluid - fluid designed for heat transfer in a chemical reaction or heat of chemical reactions taking place outside of the outer tube and/or inside the inner tube. The conditions of heat transfer in the fluid - fluid or fluid medium flowing in the annular volume, are often inhomogeneous along the perimeter of the outer tube of the heat transfer or even, in some special cases, along the inner pipe of the heat transfer. Various heat transfer device, designed to improve heat transfer in which heat transfer is used fluid - fluid known in the art.

The reactor with double tubes contains one or more double pipe heat transfer. Normally, the catalyst is fitted inside the inner tube. The reactor with dual pipes, but can also be used in configurations when the double pipe heat installed in kataliticheski the m layer. Inside the inner pipe can be fluid catalyst or emptiness. Instead of the inner pipe you can also use the rod. Each double pipe, therefore, in this configuration, surrounded by particles of catalyst that can catalyze the exothermic or endothermic reaction.

When the exothermic chemical reaction occurs in the catalytic layer on the outside of the double pipe heat transfer, the heat causes the external heating of the outer tube of the heat transfer.

The transfer of the heat generated in the fluid - the fluid flowing in the annular volume, can sometimes be problematic due to non-uniform heating of the outer tube of heat transfer, resulting in only some sections around the perimeter of the outer tube subjected to external heating. Fluid - the fluid flowing in the annular volume, has a straight-flow structure, and non-uniform heating of the outer tube of the heat transfer leads to higher temperatures of the fluid - fluid in some sections.

When outside of double pipe heat transfer is endothermic chemical reaction, the heat required for the reaction, served with hot fluid - fluid flowing in the annular volume. When the double pipe heat transfer using the place with other double pipe heat transfer, higher temperatures are observed in areas where small distance between adjacent hot double pipes. When the distance between the double pipe heat transfer more lower temperature. This inhomogeneous distribution of the gas temperature leads to non-uniform heating of the catalyst particles, and this has a negative influence on the chemical reactions taking place in the reactor. Inhomogeneous temperature distribution in the catalytic layer also leads to non-uniform temperature distribution of the fluid - fluid, when the fluid - the fluid flowing in the annular volume, has a direct flow structure.

The object of the present invention is the process of heat exchange with environment - carrier having a spiral flow structure, for indirect heat transfer in the fluid or solid medium or from it.

In addition, the object of the invention is also heat-exchanger type reactor reactor with double pipe intended for use in the above process, with the use of environment - medium for indirect heat transfer in the fluid or solid medium surrounding the pipe, or from it.

The invention

The invention relates to heat exchange type reactor reactor d is ainime pipes, containing the elements of the spacers in the annular volume of double pipe heat transfer. The spacer elements are formed so that they provide the environment rotation of the carrier around the axis of the double pipe, as it flows through the annular volume. The resulting flow structure takes the form of a spiral or helical form, which provides a number of advantages compared to conventional reactors with a double pipe in which there is no rotation, that is, in comparison with the direct flow of fluid in the annular volume.

Thus, the invention relates to a process of heat transfer reactions, including the flow of reagent in a layer of catalytic material located outside the at least one pipe heat transfer with double walls in the heat exchange reactor, the flow comes into contact of the reagent with a catalytic material in indirect heat exchange with the environment is a fluid present in the annular volume, at least one pipe heat transfer with double walls, and in the annular volume has one or more spacer elements, creating a spiral path of flow of fluid around the inner pipe heat transfer, at least one pipe heat transfer with double walls.

The invention also relates to a heat exchange reactor, the art is meant for use in the above process heat transfer containing at least one pipe heat transfer with double walls, installed in the layer of catalytic material, and at least one pipe heat transfer with double wall consists of an inner tube of a heat transfer that is installed inside the outer tube of heat transfer, resulting in a ring volume for flow of fluid between the inner surface of the outer tube of the heat transfer and the outer surface of the inner pipe of the heat transfer, and ring volume contains one or more elements of the spacers that are installed along the length of the double pipe heat transfer, and items spacers are in contact or in near contact with internal and external heat transfer tubes, and items spacers create a spiral path of flow of fluid around the inner pipe of the heat transfer.

When heterogeneous conditions of heat transfer in the environment - the carrier or from it, are transported in the annular volume of double pipe heat transfer exist along the perimeter of the outer tube, the rotating flow pattern leads to the fact that each part of the fluid is subjected to different conditions along the pipe perimeter, allowing reduced or eliminated the difference between the temperature of the fluid around the perimeter in I the th position along the length of the double pipe.

Brief description of drawings

1 shows a diagram depicting four double pipe heat transfer, located in the catalytic material.

In figures 2 and 2A shows a diagram illustrating the elements of the spacers installed on the outer surface of the inner pipe.

Figure 3 shows a diagram illustrating the elements of spacers mounted on the inner surface of the outer tube.

Figure 4 shows a diagram illustrating the elements of the spacers held by forces of compression between the walls of the annular volume.

In figures 5 and 5A shows a diagram illustrating the elements of struts, integrated into the inner tube.

In figures 6 and 6A shows a diagram illustrating the elements of struts, integrated into the outer tube.

7 shows a diagram depicting the rotating element of the spacer with respect to the pipe axis.

On Fig shows a view in plan of the expanded inner tube, integrated with elements of the spacers.

Figure 9 shows the section along line a-a indicated in Fig.

Figure 10 shows a view in plan of the expanded inner tube of the heat transfer element spacers, which continues along the length of the inner tube and has three full turns around the double pipe.

Detailed description of the invention

Process and reactor in accordance with the invention, is used when trebuetsya indirectly transfer heat to the environment - coolant or out flowing inside the annular volume, at least one double pipe heat transfer in the outer layer of catalytic material. The reactor, in accordance with the invention, is particularly preferred and provides superior heat transfer when the reactor is used more double pipe heat transfer.

Additional catalytic material may be placed inside the inner tube, if necessary.

To illustrate the problem associated with heat transfer in a conventional reactor with double heat transfer tubes installed in the catalytic layer, consider figure 1.

Figure 1 is a schematic diagram depicting four double pipe heat transfer, located in the catalytic material, which catalyzes the endothermic chemical reaction. Environment-the coolant is usually a hot gas, so it transfers heat to the reaction taking place outside of the double pipe heat transfer in the catalytic layer. Arrows 1 and 2 indicate the direction of heat transfer in various positions from environment - fluid located in the annular volume of double pipe heat transfer in the catalytic material located on the outside of the pipe. When a normal non-recirculating direct the flow of coolant through the annular volume is double the pipes heat transfer most of the heat is transferred through the wall of the outer tube in the direction where there are a greater number of catalytic material.

The direction of the high heat transfer indicated by the arrow 1. Consequently, this may lead to a lower ambient temperature of the fluid in the annular volume in these positions, while the ambient temperature of the coolant is higher in the provisions of the minimum distance between adjacent double pipe heat transfer, as shown by the arrow 2, indicating the direction of the low heat transfer.

The high temperature environment of the fluid in the flow through the annular volume in areas that require a large heat transfer, in turn, can reduce the heat transfer in these areas. The result will be an increase in uneven temperature distribution in the flow-of fluid around the circumference at a given cross section and the uneven temperature distribution of the catalyst on the outside of the double pipe heat transfer, there will be obtained a high temperature catalyst, in places where pipes are located close to each other, and the low temperature catalyst, in places where the nearest tube is located at a greater distance.

As for exothermic chemical reactions, arrows 1 and 2 in figure 1 indicate the directions of heat transfer, opposite to the direction of heat transfer when e is determistic reactions. In this case, the higher temperature of the coolant can be observed in the direction 1, and a lower temperature in the direction of 2.

When both types of reactions unequal temperature distribution is desirable because it reduces the efficiency of heat transfer and the use of the catalyst, resulting in the need to build more long reactor with greater surface heat transfer and with a large number of catalyst.

The invention solves the problem associated with the direct flow of heat transfer in the annular volume of double pipe heat transfer. To eliminate the additional costs associated with the necessity of using a large reactor in the annular volume elements are installed spacers, and due to their presence ensures the rotation of flow of the heat transfer in the annular volume. This rotation leads to the fact that the environment - the coolant is exposed to the same conditions throughout the volume, because the environment is the coolant flows through the area, which alternates between low and high heat transfer. Provide the result of the improved temperature uniformity for a given cross-section of the reactor reduces the required size of the reactor and, in addition, reduces mechanical stress and/or elastic or plastic is a mini-deformation, associated with different degrees of thermal expansion.

In the heat exchange reactor, in accordance with the invention, various fluids or solid media can take scope outside of the outer tube. If you want, in the channel formed within the inner surface of the inner tube, also may leak fluid or it can be filled with a solid medium, such as a catalytic material. Alternatively, you can use a monolithic pipe or an empty pipe. Solid and fluid environment may have different compositions, temperature, pressure and flow rate. In addition, different amounts may be partially filled with a catalyst, and can undergo a chemical reaction. Pipe wall separating the environment, allow for heat transfer from one medium to another.

Ring volume contains the fluid is a coolant. However, a number of catalytic material may optionally be present in it so that it affects the spiral flow of the heat carrier. The catalytic material may, for example, be used in the form of equipment, which caused the catalyst or in the form of granules of the catalyst.

Double pipe heat transfer consists of an inner tube inside the outer tube so that there is formed an annular volume in protrans the ve between the pipes. The inner tube comprises a wall having an inner and outer surface. The outer surface of the wall of the inner tube forms an annular volume. The outer tube also comprises a wall having an inner and outer surface. The outer surface of the wall of the outer tube is in contact with the catalyst layer, while the inner surface of the wall of the outer tube forms an annular volume.

The spacer elements can be installed on the outer surface of inner tube or on the inner surface of the outer tube. This is shown in the embodiment of figure 2, where the element spacers installed on the outer surface of the inner pipe. An embodiment shown in figa is a view in cross-section along the plane indicated by the line d-d in figure 2. In the embodiment shown in figure 3, the element spacers installed on the inner surface of the outer tube.

The spacer elements in versions of the 2 and 3 formed separately from the tube and attached to the surface of the pipe by welding. The fastening elements spacer, in addition, can be performed using brazing, gluing, screw connections, pins, rivets or other known attachment methods. Their cross section may have any shape, for example square, rectangular is, round, triangular or even a variable shape, provided that it provides attachment to the pipe surface. The shape of the longitudinal cross-section can also be arbitrary.

Instead of installing on one of the surfaces of the pipe elements, the spacers may be held in place by compression or friction forces applied to the walls of the inner and outer pipes. This is shown in figure 4.

The spacer elements can also be integrated into one or both sides of the tube, if one or both tubes are formed so that the inner pipe fit inside the outer tube. Figure 5 shows a view in longitudinal section of the element spacers, in which the outer tube was opened to display the item struts, integrated with the inner pipe. On figa shows a view in cross section through both pipes along the line b-b indicated in figure 5.

Figure 6 and 6A, similarly, respectively, shows a longitudinal section of the element spacers, integrated with the outer tube, and a cross section through both pipes along the line C-C.

The contact between the inner and outer pipe when precise adjustment can be made in the form of point contact, line contact or large surfaces of contact.

The spacer elements can be of any shape. However, the preferred embodiment of the rendered figure 7. Element spacers has a starting point 1 and end point 3 along the axis 2 of the pipe corresponding to the first and last points, respectively, spacers installed along the pipe axis. Endpoint 3 is rotated relative to the pipe axis relative to a fixed starting point. The angle θ spacers represents the angle between the longitudinal direction and the element spacers. The line from the starting point 1 spacers to endpoint 3 spacers, shown on the surface of the cylinder, has an angle θ relative to the longitudinal direction of the pipe. This creates a spiral path of flow of the coolant. From the starting point 1 to end point 3 items spacers can be, e.g., straight, curved, may be s-shaped or may have a form with many bends, variable or fixed cross-sectional shape, as described above.

Small value of the angle θ causes slight rotation of annular flow, and the large value of the angle θ leads to a significant rotation within the ring. The angle θ must be greater than 0° and less than 90°. The most suitable range of the angle θ, however, is 5°-60°.

For comparison, the magnitude of the angle θ equal to 0° for conventional spacers, and therefore, they do not create a spiral flow path.

On Fig shows a view in plan of the expanded inner tube, integrated cell battery (included) with the Tami spacers, integrated with the inner pipe, as shown in figure 5 and 5A. The outer tube is not shown. In cross section along the line a-a shows a view in cross section of the element spacers. Figure 6 shows the two-level spacer elements, separated by interval b, and each spacer has a length in the longitudinal direction C. Each level has two spacers, which are evenly distributed over the circumference of the pipe. The rotation patterns of the spacers during the transition from one level to another indicates that the spacer elements at the same level can be shifted by some number of degrees relative to the spacer elements at the previous level, in this case by 90°around the circumference of the pipe. Also shown circumference e of the inner pipe.

Figure 9 shows the section a-a item spacers presented on Fig. An element f of the spacer has a height d in the radial direction. The cross-section is shown together with the expanded outer tube g.

Figure 10 shows another preferred embodiment of containing long element spacers, are presented on a gross internal pipe. Long spacer has three full turns around the axis of the double pipe. Alternatively, it may continue uninterrupted along the entire length of the inner pipe. The spacer elements similar to those shown in the embodiments to be executed is, shown in figure 2 and 3, and they are formed separately from the tube and attached to the pipe surface using, for example, welding or using a different method, as described above. Their shape in cross section may be any, for example, square, rectangular, round or triangular, provided that it provides the possibility of mounting on the pipe surface. The shape of the longitudinal cross-section can also be arbitrary. The angle θ girth measured between the longitudinal direction and the direction of the element spacers, and it has a value of greater than 0° and less than 90°. Length 4 spacers represents the distance from the source point 3 end point 1 along the longitudinal axis 2.

In the following embodiment, the catalyst particles are located in the channel formed within the inner surface of the inner tube. Catalytic material, thus, is present on the outside of the outer tube and inside the inner tube.

All embodiments of the described above have the advantage that they create a spiral flow path for the medium - heat medium.

Catalytic steam reforming of hydrocarbons is a process in which hydrocarbons (usually methane reacts with steam, resulting in a synthesis gas enriched with hydrogen and m is neocidol carbon in accordance with the following endothermic reaction:

CH4+H2About⇔3H2+WITH

The reforming reaction is an equilibrium reaction, and the product stream contains mainly hydrogen and carbon monoxide and a small amount of carbon dioxide, methane and steam. In equilibrium the used temperature of 500-1000°C and a pressure of 0.1 to 4 MPa.

A suitable heat exchange reactor, applicable for the above reaction is reformer gas heated. Environment-cooled, in this case, it may be gas, subjected to a reforming process, and it can provide heat for the reforming reaction occurring in the catalyst bed.

Example

Use the twin-tube reformer gas heated, double pipe heat exchanger, placed in the catalyst bed, as shown in figure 1. The channels in the inner pipe of the double pipe heat transfer also contain catalyst particles. The spacer elements integrated into the inner tube as shown in figure 5, 8 and 9.

The flow of reagent - mixture of methane and steam at a temperature of 360°C is injected into reformer, where, during the catalytic contact of the gas reacts with a mixture of hydrogen, CO, CO2, methane and steam at a temperature of 880°C inside the inner pipe and the outside of the outer pipe. A significant amount of heat required for the endothermic reaction, and heating the gases is of agentov, receive from the environment is fluid, consisting of a hot gas of the gas flow is subjected to reforming, at 1000°C, is present in the annular volume reformer. This hot gas transfers heat in the gas is subjected to steam reforming in the presence of a catalyst, and exits the annular volume with a temperature of 650°.

The data relating to the dimensions below refer to Fig and 9:

The number of double pipe heat transfer:61
Pipe length heat transfer:11000 mm
The number of levels spacers:14
Spiral spacers at each level:2
The distribution of the spacers at each level:180 degrees
from each other (even)
Rotation patterns spacers from one
to the next level:90 degrees
The distance between the levels of the spacers (In):775 mm
The length of the spacer (S):187 mm
The height of the spacers (D):8 mm
The angle (θ) spacers:13.2 degrees

The results showed that the number of spiral turns around the axis in double pipe that runs annular gas flow when the flow through the entire length of the double pipe, was six turns. The increase in pressure drop caused by the spacers, amounted to 70%, which was acceptable.

1. The process for carrying out reactions, heat transfer, including the flow of reagent in a layer of catalytic material located outside the at least one pipe heat transfer with double walls in the heat exchange reactor, the flow comes into contact of the reagent with a catalytic material in indirect heat exchange with the environment is a fluid present in the annular volume, at least one pipe heat transfer with double walls, and ring volume contains one or more spacer elements, creating a spiral path of flow of fluid around the inner pipe heat transfer, at least one pipe heat transfer with double walls.

2. The process according to claim 1, in which the reaction heat is a steam reforming reaction.

3. Heat exchange reactor, the art is meant for use in the process according to claim 1, containing at least one pipe heat transfer with double walls, located in the layer of catalytic material, and at least one pipe heat transfer with double wall consists of an inner tube of a heat transfer that is installed inside the outer tube of heat transfer, resulting in a ring volume for flow of fluid between the inner surface of the outer tube of the heat transfer and the outer surface of the inner pipe of the heat transfer, and ring volume contains one or more elements of the spacers along the length of the double pipe heat transfer elements and spacers are in contact or in near contact with the inner, and external heat transfer tubes, and items spacers create a spiral path of flow of fluid around the inner pipe of the heat transfer.

4. The reactor according to claim 3, in which one or more elements of the spacer has an end point which is rotated relative to the pipe axis, at a fixed starting point.

5. The reactor according to claim 4, in which the endpoint of one or more elements of the spacer is rotated by an angle greater 0° and smaller 90° with respect to the pipe axis.

6. The reactor according to claim 3, in which one or more elements of the spacer fixed to the inner tube or formed integrally with it.

7. The reactor according to claim 3 in which one or more spacer elements mounted on the outer tube or formed integrally with it.

8. The reactor according to claim 3, in which the annular volume contains catalytic material.

9. The reactor according to claim 3, in which the inner tube contains a heat transfer catalytic material.

10. The reactor according to any one of p-9, in which the heat exchange reactor is a steam reforming reactor.



 

Same patents:

FIELD: mechanical engineering.

SUBSTANCE: method of maintenance of leak spot of cooling radiator core by means of sealing of leak sp is that to supposed leak spot of radiator it is overlapped rubber pad, lubricated by layer of oil for that after solidification of compound it is self-detaching, damaging coating. Radiator is laid horizontally on lazy board, so that rubber pad is impacted to radiator. From the opposite side, that is from above it is inserted damaged place of radiator rods with increased / thermal conductivity (copper, aluminium) and is filled by compound up to full filling by it of all cells up to top, for instance polymerous composition.

EFFECT: increase of effectiveness and simplification of maintenance, productivity gain and cost saving of repair works.

1 dwg

FIELD: heat engineering.

SUBSTANCE: invention relates to heat engineering, namely to the turbulising unit design and can be used in different heat exchanging pipes of industrial heat exchangers. The turbulising unit for a heat exchanging pipe comprises swirling blades which are streamlined by the heat carrier flow and are rigidly fixed on the axis with the specified interval, the axis is made as two intertwisted rods and the swirling blades are made as rectangular plates mounted between the twisted rods and set along the pipe length with the interval of 0.5-5 inner pipe diametres. The twisting value changes the rotation angle of the plate plane in respect to the heat carrier flow by 1-15 grad and the rotation angle of the swirling blades in respect to each other by 15-90 grad.

EFFECT: optimal intensification of heat exchange in the heat exchanging pipes with different operation modes is achieved during a short period of time and without great expenditures.

1 dwg

FIELD: heat engineering.

SUBSTANCE: invention relates to heat engineering, namely to the turbulising unit design and can be used in different heat exchanging pipes of industrial heat exchangers. The turbulising unit for a heat exchanging pipe comprises swirling blades which are streamlined by the heat carrier flow and are rigidly fixed on the axis with the specified interval; the swirling blades are made as rectangular plates with sharp edges, the central part of the plates is placed parallel to the flow and the ends are turned at the angle of 15-45 grad in respect to each other; the swirling blades are set along the pipe length with the interval of 1-5 inner pipe diametres.

EFFECT: proposed turbulising unit for a heat exchanging pipe ensures reduction of hydraulic resistance of the heat carrier flowing inside the pipe and intensification of the heat exchanging process along with simple design.

1 dwg

FIELD: heating.

SUBSTANCE: invention concerns thermal engineering and can be applied in heat-structure cooling systems. It can be gas turbine vane or supersonic gas nozzle. It can be applied in heat exchange plants, steam generators, cryogenic equipment and other aggregates. Device for heat exchange between wall and medium flow includes wall and detail of porous permeable material connected to it. The detail features holes directed along the flow, opened at one side and connected to medium supply or drainage elements, and closed at the other end. The detail is made in the form of undular spacer consisting of contact sectors and heat exchange ridges. Holes are formed by spacer ridges and wall and feature figured cross-section. Contact sectors are connected to wall, and spacer pore diametre in vicinity of contact sector is less than in the ridge area.

EFFECT: reduced weight of structure.

25 cl, 23 dwg

FIELD: heating.

SUBSTANCE: invention relates to heat engineering, namely to manufacturing procedures of connecting a heat exchanger pipe to many pipe ribbing plates or, for example, to one spiral plate made of a strip and having an axially directed opening for the pipe to enter the spiral, and is aimed mainly at using in the series-produced convectors for heating building rooms in the construction. It can also be used in other industry branches. The method of fixing plates to the heat exchanger pipes involves inserting the pipes into the plates' openings and increasing the pipe diametre up to the rigid fixation of the plates on the pipe, the pipe diametre is increased by sealing of its cavity, introducing working substance into the pipe cavity and increasing the working substance pressure up to the rigid fixation of the plates on the pipe. Air or liquid or explosive material or flammable explosive gas can be used as the working substance.

EFFECT: reducing power and labour demand for the connection of the pipe with the heat exchanger plates and improving the heat exchanger functionality.

1 cl, 6 dwg

FIELD: heating.

SUBSTANCE: proposed thermal radiator is in form of a heat-conducting metallic structure with fins for increasing heat transfer and has elements for fastening on pipes containing liquid or gaseous heat carrier. The radiator is in the form of a detachable metallic collar, with split straps on the pipe with heat transfer fins and elements for stretching them into close contact with the pipe. Straps which are in contact with the pipe are made with C-shaped channels with the shape of the cross section of the pipe. The collar has lateral length of not less than four times and width of not less than twice the diameter of the pipe. The outer surface area of the straps with fins is at least twice larger than the outer surface of the pipe where it is fitted. Each collar contains not less than 3 main heat transfer fins, including the fin for fastening the straps of the collar along the pipe. Part of the main fins is integrated with the base of the straps. The sector covered by each C-shaped channel does not exceed 175 degrees. The straps can be made in form of thin walled sealed pipe shells, filled with liquid heat carrier like water. It is recommended that, the main heat transfer fins be installed with clearance of approximately 100 between themselves. V-shaped fins with diverging parts can be used as well. The collar can be made from 2-5 solid linear rod-shaped straps, the linear fins of which fan out on rectilinear generators from the C-shaped channel with a segmental-cylindrical shape. Horizontal shelves can be mounted on the heat exchange fins for putting flowers and decorative plates of various shapes.

EFFECT: invention can be mounted quickly, allows for improving the appearance of the room and piping system, giving them extra functions.

1 cl, 7 dwg

FIELD: heating.

SUBSTANCE: invention deals with design of equipment intended for handling chemicals whose high corrosive activity necessitates special provision for the apparatus efficient long-term corrosion protection. The apparatus thereby proposed as capable to provide for the problem solution contains a heat exchanger equipped with a tube bundle; it is specially designed for exchange of heat between two liquid media with one of them, characterised by high corrosiveness, circulating through the bundle of tubes. The tube bundle is composed of a single or multiple tube(s) fabricated of titanium or a titanium alloy with a zirconium (zirconium alloy) coating applied metallurgically or by way of welding.

EFFECT: development of a heat exchanger efficiently protected against the destructive impact of highly corrosive chemicals being handled, reliably operable, characterised by a lengthier service life and easily maintainable and repairable.

2 dwg, 11 cl

FIELD: power engineering.

SUBSTANCE: method of low-temperature heat utilisation and device for its implementation allow for the usage of low-temperature heat sources to preheat water. Method of fluid heat utilisation implies increasing velocity of the heat transfer medium flow by an additional jet which is directed tangentially to the heat transfer medium channel or at an angle to the section plane of the heat transfer medium channel. Heat recovery unit comprises a heat transfer fluid channel with an inlet and outlet and a channel for the medium being heated with an inlet and outlet; the above channels are separated from each other by a heat-conductive wall; an inlet nozzle is set in the heat transfer fluid channel to increase the fluid velocity. The heat transfer medium channel is a metal pipe while the helix-shaped channel for the medium being heated is made up by the space between the pipes set one inside the other.

EFFECT: increasing heating capacity of the heat transfer medium by increasing its velocity and contact surface with the separating wall.

7 cl, 2 dwg

Heat exchange tube // 2334188

FIELD: heating.

SUBSTANCE: heat exchange tube has section made in the form of semi-cylinder in its lower part along the whole length of tube with roughness that is more than the roughness of the tube upper half, on internal surface. At that tape turbulence promoter in tightly inserted into the tube, which has slot gaps in the upper part and is fixed with nut.

EFFECT: reduction of heat exchange equipment dimensions with application of suggested tubes.

6 dwg

FIELD: constructional engineering, pipelines.

SUBSTANCE: invention refers to cleaning heat exchanger pipelines using ball-shaped elements. Ball-catcher includes sieving channel with sieving gate for emergency pressure release. Sieving gate can move between closed position where cleaning balls are grasped with ball-catcher, and open position where total fluid flow resistance within pipeline is decreased. The system is designed so that the gate in normal position is closed and can move to open position for clearing or as a response to preset pressure difference between components of sieving channel upwards and downwards by flow. Invention also refers to method of cleaning balls removal.

EFFECT: provided removal of cleaning balls from water and their recirculation for a new supply.

10 cl, 9 dwg

FIELD: heat-and-mass transfer.

SUBSTANCE: invention relates to devices designed to cool fluids and distributor thereof, as well as to methods of clearing and sterilising such apparatuses. Proposed device comprises primary heat exchanger, secondary heat exchanger, 1st pipeline for fluid to be cooled to circulate therein. It comprises heat carrier to transfer cooling power to fluid to be cooled that circulates in the 1st pipeline. Note here that aforesaid primary and secondary heat exchangers are arranged, at least, partially, one into another. Note also that primary heat exchanger comprises the 2nd pipeline that passes together with secondary heat exchanger 1st pipeline and around it and along, at least, a portion of the length of aforesaid pipeline. The proposed device additionally comprises fluid source and, at least, one distributor valve. Note here that the said distributor incorporates a cooler implemented in compliance with one of the described versions. Proposed method of sterilising cooled fluid comprises the steps that follows, i.e. draining fluid from the chamber with primary heat exchanger heat carrier, or draining fluid from the 2nd pipeline carrying primary heat exchanger hear carrier, draining fluid from the 1st pipeline that carries fluid to be cooled and distributed, sterilising the 1st pipeline during the period sufficient for killing bacteria and sterilising.

EFFECT: higher efficiency and simpler servicing.

53 cl, 4 dwg

FIELD: mechanics.

SUBSTANCE: invention relates to "pipe-in-pipe"-type heat exchangers and can be used in various industrial branches. The proposed heat exchanger comprises an inner pipe with external cylindrical ribs representing hollow pipes and turbulator mounted thereon and representing a helical tape coiled on the rod, a tangential branch pipe to feed intertubular medium and that to discharge aforesaid medium. Note here that straight cylindrical ribs, arranged all long the heat exchanger length, are fitted on the inner pipe outer surface with the help of bent metal plates and brought out into common branch pipes of feeding and discharging inner pipe medium via tube plates.

EFFECT: simplified mounting/dismantling, intensified heat exchange, reduced costs of clearing pipes.

2 dwg

FIELD: heating.

SUBSTANCE: apparatus can be used in steam and liquid cooling systems. The heat exchange apparatus consists of external and internal pipes, installed at an angle of 0-85° to the horizontal and arranged concentrically relative each other, each of which is equipped with sockets for input and output of the heat carrier. The internal pipe is divided into sections, made with the provision for interconnection of the sections through overflow openings, made in the form of segmented apertures in the intersection partition walls, installed with alternation of these openings upwards and downwards, and made in the form of segmented diaphragm. The segmented openings are formed in the space between the wall of the internal pipe and the diaphragm, and the overflow thresholds of the partition walls are parallel to each other and relative the horizontal.

EFFECT: simple structure.

1 dwg

Heat exchanger // 2269080

FIELD: heat engineering, applicable in heat exchanging apparatus with recuperative heat transfer in various branches of industry.

SUBSTANCE: the heat exchanger has a body with pipe-branches for feeding and discharging the working media and ducts for the heat transfer agents formed by the ribs adjoining the body shell, the body is made in the form of a cylindrical shell enclosing the heat exchange surface made as a double screw thread with formation of two screw ducts of the same section separated by a wall serving as a rib of the heat exchange surface, feed and removal of heat-transfer agents are accomplished by means of manifolds, in which partitions are installed for separation of the flows of heat-transfer agents, besides, the roughness of the heat exchange surface makes it possible to use viscous heat-transfer agents, and at feeding of heat-transfer agents to the screw ducts separation of the heat-transfer agents is not required.

EFFECT: enhanced operating reliability and intensification of heat exchange.

FIELD: methods of treatment of fluocarbon raw.

SUBSTANCE: the invention is pertaining to the methods of treatment of fluocarbon raw. The method of treatment of fluocarbon raw provides for heating by means of high frequency induction of a heating zone of a reaction chamber up to the temperature of no more than 950°C, heating in the heating zone of fluocarbon raw, which contains at least one fluocarbon compound, so, that the fluocarbon compound dissociates with production of at least one predecessor of fluocarbon or its reactive kinds; and refrigerating of the predecessor of fluocarbon or its reactive kinds, in the result of which from the predecessor of fluocarbon or its reactive kinds forms at least one more desirable fluocarbon compound. The technical result is conversion of the fluocarbon raw into the useful products by the low-cost reliable non-polluting environment universal and easily controlled method.

EFFECT: the invention ensures conversion of the fluocarbon raw into the useful products by the low-cost reliable non-polluting environment universal and easily controlled method.

12 cl, 10 dwg, 3 tbl, 2 ex

FIELD: heat exchange apparatus.

SUBSTANCE: surface heat exchanger comprises casing provided with bearing lags, lens compensator, pipe bench with branch pipes for supplying and discharging heat-transfer agent, and front water chamber with the baffle that divides it into two sections. One of the sections is provided with the branch pipes for supplying and discharging of the fluid to be heated, and the other section defines the back water chamber. The pipe bench inside the housing is separated by the horizontal baffle provided with the by-pass port interposed between the lens compensator and back water chamber. The top and bottom sections of the pipe bench are separated with the vertical baffles arranged symmetrically to each other.

EFFECT: improved heat exchange and enhanced heat power and reliability.

1 dwg

FIELD: heat exchange.

SUBSTANCE: heat exchanger comprises housing with front and back supporting lags of different height, lens compensator, pipe bundle with branch pipes for supplying and discharging heat-transfer agent, and front water chamber with the baffle which divides the pipe bundle into two sections. One of the sections is provided with branch pipes for supplying and discharging fluid to be heated, and the other section defines the back water chamber. The lens compensator is mounted in the vicinity of the back water chamber, and back supporting lag of the housing is provided with the additional supporting unit and mounted on the housing upstream or downstream of the lens compensator.

EFFECT: improved heat exchange and enhanced reliability.

1 dwg

FIELD: heat-exchange apparatus.

SUBSTANCE: air cooler comprises vortex heat exchangers, pipes of the vortex heat exchangers for flowing air to be cooled flows, swirlers, and actuator of purifying mechanisms. The actuator has hollow driving shaft mounted in the pipes and provided with a longitudinal groove throughout its length. The groove receives unmovable screw with a nut coupled with the bushing freely mounted on the shaft through a key. The brush holder with brushes are secured to the bushing. The outer side of the pipes of the vortex heat exchangers are provided with chutes for circulating a coolant. The vortex heat exchangers has a fining with a coefficient that varies according to the relationship where D is the diameter of the pipe, n is the number of chutes, and l is the chute width. The parameters vary in the following range: D = 50-800 mm and l = 20-50 mm. The chute height l1 =3-40 mm, the thickness of the pipe wall and the thickness of the chute wall

EFFECT: simplified structure and enhanced reliability.

5 cl, 7 dwg

FIELD: baking industry.

SUBSTANCE: proposed plant includes trap hood and heat exchange cooling unit connected with it and mounted under it; cooling unit includes jacket with pipe line located over its center. Heat exchange cooling unit is used for forced circulation of cold air between jacket and pipe line inside it directing the flow in required direction: in cold season outside air is delivered and at hot season air from floor areas is delivered.

EFFECT: simplified construction; enhanced ecology; saving of water.

1 dwg

FIELD: heat power engineering.

SUBSTANCE: according to proposed method, inner pipe is fitted into outer pipe after shape-treatment of at least outer surface of inner pipe or inner surface of outer pipe, and after fitting inner pipe outer pipe, inner pipe is expanded to bring outer surface of inner pipe in tight contact with inner surface of outer pipe, and shape-treatment of surface forms at least one channel to reveal leakage between two pipes. Before fitting in pipes at least outer surface of inner pipe or inner surface of outer pipe is coated with layer of solder, for instance, tin, and inner pipe is expanded so that outer pipe also expands, and solder layer between inner and outer pipes is melted. Outer pipe is expanded so that melted layer of solder is forced out from space between inner and outer pipe at least intone channel to reveal leakage. Such heat exchange pipe contains assembly unit consisting of outer pipe and inner pipe fitted at tight contact in between and at least one channel to reveal leakage passing in contact surface and near the surface between inner and outer pipes. Thin film-like layer of solar material, such as tin, is provided in place of contact between inner and outer pipes which, owing to melting, connects with inner pipe and outer pipe, inner and outer pipes adjoining with displacement. Invention makes it possible to increase heat transfer to value equal to or practically equal to that of solid heat exchange pipe and channel to reveal leakage remains free from filling medium, thus providing accurate and reliable revealing of leakage.

EFFECT: improved reliability.

15 cl, 6 dwg

FIELD: heat power engineering.

SUBSTANCE: according to proposed method, inner pipe is fitted into outer pipe after shape-treatment of at least outer surface of inner pipe or inner surface of outer pipe, and after fitting inner pipe outer pipe, inner pipe is expanded to bring outer surface of inner pipe in tight contact with inner surface of outer pipe, and shape-treatment of surface forms at least one channel to reveal leakage between two pipes. Before fitting in pipes at least outer surface of inner pipe or inner surface of outer pipe is coated with layer of solder, for instance, tin, and inner pipe is expanded so that outer pipe also expands, and solder layer between inner and outer pipes is melted. Outer pipe is expanded so that melted layer of solder is forced out from space between inner and outer pipe at least intone channel to reveal leakage. Such heat exchange pipe contains assembly unit consisting of outer pipe and inner pipe fitted at tight contact in between and at least one channel to reveal leakage passing in contact surface and near the surface between inner and outer pipes. Thin film-like layer of solar material, such as tin, is provided in place of contact between inner and outer pipes which, owing to melting, connects with inner pipe and outer pipe, inner and outer pipes adjoining with displacement. Invention makes it possible to increase heat transfer to value equal to or practically equal to that of solid heat exchange pipe and channel to reveal leakage remains free from filling medium, thus providing accurate and reliable revealing of leakage.

EFFECT: improved reliability.

15 cl, 6 dwg

Up!