Shell-and-tube heat exchanger

FIELD: power engineering.

SUBSTANCE: shell-and-tube heat exchanger comprises joined identical sections, every of which comprises a bundle of tubes fixed in tube plates, installed in a vessel, collector chambers of tube and shell media, at the same time each section is equipped with end rigid hollow covers, in the side walls of which perpendicularly to the longitudinal axis of the section there are through holes arranged, at the same time the sections are connected to each other along axes of the provided holes in covers via sealing elements between side walls of covers, cavities of which form a collector chamber of tube medium. Each section is additionally equipped with at least one rigid shell tightly covering the vessel and installed in a gap between end covers, in areas adjacent to tube plates, in side walls of which jointly with the vessel there are through holes arranged, the axis of which lies in the same plane with axes of holes of end covers, at the same time the sections are additionally connected to each other along axes of arranged holes in the shell and the vessel via the specified sealing elements between side walls of the shell, cavities of which form a collector chamber of shell medium.

EFFECT: unification and reduction of heat exchanger dimensions.

4 cl, 3 dwg

 

The invention relates to the development and design of heat exchangers and can be used in industrial heat power engineering, chemical, food and other industries.

Known shell-and-tube heat exchanger containing interconnected identical sections, each of which contains housed in the casing tube bundle, secured to the opposite ends in the tube sheets (Patent RF β„–2011945, MKI F28D 7/16, Appl. 16.0692, publ. 30.04.94). In this heat exchanger is achieved improved performance in a smaller volume due to more dense sections, however, the use of special collectors pipe and tube media greatly aggravates and complicates its design.

The closest in technical essence is a shell-and-tube heat exchanger containing interconnected identical sections, each of which contains housed in the casing tube bundle, secured to the opposite ends in the tube sheets, and the collector of the camera tube and shell environments with partitions forming a spatial join between sections (Patent RF β„–2133004, MKI F28D 7/00, Appl. 29.08.96, publ. 10.07.99). This solution allows you to create a relatively compact construction and increase the efficiency of the heating surface of the heat carrier for the even application of manifold chambers instead of the intermediate inlet and outlet connecting pipes. Despite the decrease of the occupied heat exchanger area, it has a high mass and metal content.

Known shell-and-tube heat exchanger (Patent RF β„–95391, IPC F28D 7/16, Appl. 29.04.2009, publ. 27.06.2010), containing a hollow casing, is placed in the casing of the tube bundle, each of which both ends are executed in parallel to the axis of the pipe polyhedral surfaces in the shape of a regular hexagon, and the diameter of the inscribed in the hexagon circle equal to the diameter of the outer circular surface of the remote elements of the pipe that allows you to create tight tube bundle and to reduce the external dimensions of the heat exchanger. Despite the decrease in the diameter of the heat exchanger, the method of connection of the sections is not possible to reduce the dimensions of the heat exchanger.

The invention solves the problem of reducing the weight of the shell-and-tube heat exchanger, reducing its size and improving the processability when creating heat exchangers for various purposes.

The invention consists in that in shell-and-tube heat exchanger containing interconnected identical sections, each of which contains housed in the casing tube bundle contained in the tube grids, sewer camera pipe and tube media, with each section provided with end rigid hollow to what askamy, in the side walls which are perpendicular to the longitudinal axis of the section is made through through holes, and the sections are connected on axes made holes in the lids through the sealing elements between the side walls of the cover, the cavity of which form a manifold chamber pipe protection, each section is further provided with at least one hard encloses the casing sides, placed in the interval between the end caps, in areas adjacent to the tube grids, in the side walls which together with the casing is made through through holes, the axis of which lies in the same plane with the axes of the holes of the end cap, with section additionally connected on axes made holes in the shell and the casing through the mentioned sealing elements between the side walls of the shell, the cavity of which form a manifold chamber shell environment.

In other embodiments, it is preferable that each section is equipped with two hard shells, placed on opposite sides of the casing, and sections can be interconnected tightening pins parallel to the axes of the through-holes in the lid and the ring.

Thus, at least part of the sealing elements mounted between the side walls to which ISEC and shells, can be made in the form of plugs, forming the walls of the collecting chambers.

The invention is illustrated in the drawings, in which figure 1 presents the structural layout of the run and connect sections of shell-and-tube heat exchanger, 2 - speed cross-section of one section, figure 3 - diagram of the formation of shell-and-tube heat exchanger with predetermined movement directions environments by installing plugs.

Shell-and-tube heat exchanger contains two or more identical heat exchange sections 1 (1), each of which includes a bundle of tubes 2, is placed in the casing 3 and is secured at opposite ends in the tube sheets 4. Each section is equipped with a mechanical hard hollow caps 5, the side walls of which are made through through holes 6. 7-axis through-holes in the caps are oriented perpendicularly to the longitudinal longitudinal axis 8 of the sections 1. Sections adjacent to each other side walls of the covers 5 and are interconnected along the axes of the through-holes 6 in these caps through the sealing elements 9 along the contour of the holes. While from the inside of the lid 5 is formed a reservoir chamber 10 pipe environment, for example, two sections. For simplicity ensure tight connection of the sections of the side walls of the lid 5 may be flat (figure 2).

Each section can be the ΓΌ equipped with at least one hard encloses the casing 3 sides 11, in which along with the cover made through through holes 12, the axis 13 of which are located in one plane with the axis 7 through-holes in the lids. Thus, the partition can be further interconnected along the axis 13 through-holes in the cowling through the sealing elements similar to elements 9 for caps 5. In the area of spatial interconnected cavities of the shells form a manifold chamber 14 to the outside environment. Both the collector chamber 10 and 14 are supplied with mounting flanges 15.

The most effective execution of each section with two shells 11, placed on opposite sides of the casing in the areas adjacent to the tube grids 4 (figure 1). The connection of the sections and sealing the collector of cameras by using the tightening of the studs 16 and the supports 17 (figure 3). Some sealing elements can be made in the form of plugs 18 (figure 3). Arrow 20 figure 3 shows the inlet of the heat exchanger inside the pipe environment, and the arrow 19 - login shell environment.

Shell-and-tube heat exchanger operates as follows. Identical sections 1, each of which is structurally embedded manifold chambers tube and pipe environment, simply typed in the battery with the specified number of partitions. After sealing the battery by using, e.g. the measures tightening of the studs 16 of the manifold 10 and 14 of the camera for each of the environments are formed without any additional structural elements and process operations. This allows to unify the heat exchangers for various purposes, as in the Assembly of heat exchangers with the given number of sections on specific thermal characteristics are not required for each such heat exchanger design and manufacture of special collector chambers. The result is an increase in weight and size characteristics by decreasing the material structure, as well as reducing the number of knots and fastenings. In General, markedly increases the manufacturability of products, since the costs for design, materials and manufacturing of heat exchangers.

In the operation of the heat exchanger of one fluid through one of the mounting flanges 15 flows into the collector chamber 14 to the outside environment, the other medium flows through the other flange to the collector cell 10 pipe environment. Using partitions, functions of sealing elements in the form of plugs 18, is provided counterflow shell and tube environments. By varying the placement of the plugs in the heat exchanger with a large number of sections, the latter can form blocks, which is set parallel for cf is D. This increases the heat exchange surface and decrease the hydraulic resistance to flow environments. In addition, no special connecting elements are implemented multi-circuit heat exchange.

1. Shell-and-tube heat exchanger containing interconnected identical sections, each of which contains housed in the casing tube bundle contained in the tube grids, sewer camera pipe and tube media, with each section provided with end rigid hollow caps, side walls which are perpendicular to the longitudinal axis of the section is made through through holes, and the sections are connected on axes made holes in the lids through the sealing elements between the side walls of the cover, the cavity of which form a manifold chamber pipe environment, characterized in that each section is further provided with at least one hard tightly covering the casing sides, placed in the interval between the end caps, in areas adjacent to the tube grids, in the side walls which together with the casing is made through through holes, the axis of which lies in the same plane with the axes of the holes of the end cap, if this section is additionally connected on axes made holes in the shell and the casing through the aforementioned sealing elements between the side walls of the shell, cavity which form a manifold chamber shell environment.

2. Shell-and-tube heat exchanger according to claim 1, characterized in that each section is equipped with two hard shells, placed on opposite sides of the casing.

3. Shell-and-tube heat exchanger according to claim 2, characterized in that the sections are interconnected tightening pins parallel to the axes of the through-holes in the lid and the ring.

4. Shell-and-tube heat exchanger according to claim 3, characterized in that the part of the sealing elements mounted between side walls of the caps and shells, made in the form of plugs, forming a septum.



 

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EFFECT: improved heat exchange and enhanced reliability.

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EFFECT: improved heat exchange and enhanced reliability.

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

1 dwg

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