FR2620208A1 - TUBULAR HEAT EXCHANGER APPARATUS - Google Patents

Abstract

The invention relates to a heat exchange apparatus. According to the invention, it comprises a body 1, in which are arranged heat exchanger tubes 2, fixed in perforated trays 3 and assembled in sections 4, which form a block 5 of tubes. Each section 4 is linked to intake and exhaust manifolds 7, 8. The body has inlet and outlet pipes 10, 11 to which the cold and hot zones 12, 13 are joined, respectively. The block of tubes 5 is housed in a casing 14 mounted in the body 1 with a spacing 15. A partition 16 is mounted between the body 1 and the casing 14 to separate the cold and hot zones 12, 13. The inner surface of the casing 14 conforms to the outer surface of the block of tubes 5. The invention applies in particular to the thermal and electrical energy production industry.

Description

The present invention relates to devices mounted in different

  vapor separator devices, and

  in particular, heat exchangers.

  It is very effective to apply the present invention to the thermal and electrical power generation industry and, in particular, to nuclear power plants, in a separation system.

  intermediate and overheating of the steam of the turbine.

  The invention can also be used in

  cryogenic and refrigerated equipment and in other

  branches of industry in which there is a need for trans-

  put the heat from one body to another that is in

a gaseous or liquid phase.

  There is a heat exchanger apparatus (SU, A, 479942) having a body housing heat exchange tubes, fixed in perforated trays and assembled in sections, forming a block of tubes, while the body is provided with

  inlet and outlet tubing, to which

  the cold and hot areas join. The external surface

  the tube block is toothed while the surface

  Inner body is cylindrical.

  This construction of the heat exchanger apparatus in which there are channels between the cold and hot areas, between the block of tubes and the body because the outer shape of the block does not match the shape of the inner surface of the body , does not ensure a regular thermal field of a current to be heated in the outlet tubing. As a result, the efficiency of the exchange of

heat is diminished.

  A heat exchanger apparatus (SU, A, 600352) is known having a body in which tubes are arranged, fixed in perforated trays and assembled in sections, forming a block of tubes, each section being connected to the inlet manifolds and outlet and the body being provided with an inlet manifold and an outlet manifold to which

  join cold and hot areas. The shape of the sur-

  outer face of the block of tubes is toothed while the sur-

  inner side of the body is cylindrical. Consequently,

  the outer surface of the block of tubes and the inner surface

  of the body form channels in which expellers are mounted, with a certain clearance. This construction of the heat exchanger apparatus, in which the cold and hot zones are connected not only by the block of tubes but also by the formed games between expellers

  and the block of tubes, does not provide a regular thermal field.

  connect current to be heated in the outlet tubing. This leads to the reduction of the efficiency of the heat exchange. In addition, the assembly of the expellers in the channels complicates the technology of the manufacture of a heat exchanger apparatus and leads to an increase in

  amount of metal consumed for its manufacture.

  We therefore proposed to put a heat exchanger

  of heat to the point, in which the modification of the

  tion of the tube block to the body would ensure a steady thermal field of the heated current in the tubing

Release.

  The problem thus posed is solved by means of a heat exchanger apparatus comprising a body in which are

  arranged heat exchanger tubes, fixed in

  perforated and assembled in sections forming a block of tubes, each section being connected to an intake manifold and an exhaust manifold and the body being provided

  inlet pipe and outlet pipe to which

  the cold and hot zones are joined, characterized, according to the invention, in that the block of tubes is housed in an envelope, mounted with a spacing and made so that its inner surface matches the outer surface of the block of tubes and in that a partition is mounted between the

  body and envelope to separate cold and hot areas.

  It is advantageous that the partition comprises two plates,

  one of said plates being annular and having a transpor-

versale shaped angle.

  This construction of the heat exchanger apparatus, wherein the block of tubes is disposed in an envelope, the inner surface of which matches the outer surface of the block of tubes and o a partition is provided between the envelope and the body to share the cold and hot zones, ensures a regular thermal field of a current in the outlet tubing. In this case, the efficiency of the heat exchange is raised. In addition, this design of the heat exchanger apparatus simplifies the technology and reduces the

  amount of metal needed for manufacturing.

  The invention will be better understood and other purposes, details and advantages thereof will become more apparent in the

  light of the following explanatory description of a

  embodiment given solely by way of nonlimiting example with reference to the accompanying nonlimiting drawings, in which: - Figure 1 shows, schematically, a heat exchanger apparatus, according to the invention, in longitudinal section; ; - Figure 2 is a section along II-II of Figure 1; - Figure 3 shows a set A in Figure 1, on an enlarged scale; and FIG. 4 represents a set B in FIG. 2,

on an enlarged scale.

  The heat exchanger apparatus has a body 1

  (FIGS. 1, 2) in which sample tubes are

  heat generators 2 (Figures 1, 4), fixed in perforated trays 3 (Figure 1) and assembled in sections 4 (Figure 2), forming a block of tubes 5. Each section 4 is placed in communication via distribution tubes 6, with an intake manifold 7 and an exhaust manifold 8 (Figure 1) and is installed on a support grid 9. The body 1 is provided with an inlet pipe 10 and an outlet pipe 11 to which the cold and hot zones 12, 13 join respectively. The block 5 of tubes is housed in an envelope 14. The envelope 14 is mounted in the body 1 with a spacing 15. The inner surface of the envelope 14 matches the outer surface of the block 5 of tubes. A partition 16 is provided between the body 1 and the envelope 14. It comprises two plates 17 and 18

  (Figure 3). The plate 17 is annular and its transpor-

  versale is shaped like a square. Partition 16 (FIG. 1) separates the cold and hot zones 12, 13. The tubes exchange

  Heat generators 2 have fins 19 (Figure 4).

  By arranging the block of tubes 5 (FIGS. 1, 2) in a casing 14 and mounting a partition 16 between the body 1 and the casing 14, it ensures the displacement of a current to be heated only through the block of tubes. 5, thus obtaining a regular thermal field of the current to be heated in

the outlet pipe 11.

  The heat exchanger apparatus operates as follows.

  A heating stream coming from a source, for example

  of a high pressure cylinder of a turbine (not shown).

  on the drawing), reaches through the tubing of

  10 (Figure 1), in the cold zone 12, then arrives, thereof, in the block of tubes 5 where it is distributed among the sections 4. Having circulated through the tubes 2, the current to

  heat is heated by the heat transferred. of the heating current

  In the hot zone 13, the current is sent through the outlet pipe 11, to a consumer device, for example, a low-pressure cylinder of the turbine (not shown). on the drawing). From the source (not shown

  in the drawing), the heating current arrives in the collection.

  exhaust pipe 7 and is conveyed by the distribution pipes

  bution 6, to sections 4, where it is distributed according to the heat exchanger tubes 2. Having passed through the tubes

  heat exchangers 2, the heating current gives way to

  inform them to warm up and then,

  to the distribution tubes 6, in the exhaust manifold

  8, and is sent from it to a circuit of the thermal system (not shown in the drawing). Partition 16 prevents the current to be heated from arriving from the cold zone

  12 in the hot zone 13 through the spacing 15. The

  the thermal extension of the heat exchange tubes 2, the casing 14 and the body 1j is ensured by virtue of the flexibility of the annular plate 17 (FIG. 3) of the partition 16.

  Thanks to the regular thermal field of the heating current

  iron in the outlet manifold, the use of the heat exchanger apparatus discussed above improves

  the efficiency of the exchange of heat, the ratings of

  the amount of metal needed to manufacture

  being reduced-and lower than those of a known apparatus.

  In addition, the examined variant embodiment of the heat exchanger apparatus makes it possible to simplify the technology of

its manufacture.

Claims (2)

  1. Heat exchanger apparatus of the type comprising a body in which heat exchanger tubes are housed, fixed in perforated trays and assembled in sections   forming a block of tubes, each section being brought into   communication with intake and exhaust manifolds and the body being provided with inlet and outlet   to which the cold and warm zones   characterized in that the tube block (5) is housed in a casing (14) mounted in the body (1) with a spacing (15) and its inner surface matches the outer surface of the tube block (5) and in that a partition (16)   is mounted between the body (1) and the casing (14) to separate   cold and hot areas (12, 13).   2. Heat exchanger apparatus according to the claim   1, characterized in that the partition (16) comprises two plates   (17, 18) of which one (17) is annular and its section   cross is square.