FR2492081A1 - HEAT TRANSMITTERS FOR REGENERATION HEAT EXCHANGE - Google Patents

Abstract

THE INVENTION CONCERNS HEAT TRANSMITTING ELEMENTS IN THE FORM OF A HOLLOW BODY 1 FILLED WITH A GAS 3, ARRANGED IN A TURBULENT OR STATIC LAYER, IN A HEAT EXCHANGER AND CYCLICALLY TRANSPORTED FROM A HOT ZONE TO A COLD ZONE, ENSURING A INTENSIVE HEAT EXCHANGE AND AUTOMATIC CLEANING OF ELEMENTS.

Description

i

  The present invention relates to the elements transmits-

  heat generators for heat exchange by regeneration

  ration. The invention proceeds from depleted heat exchangers of heat accumulators having the known form of

  structures made of plates or grids.

  These heat exchangers transmit heat from

  the hot zone to the cold zone by means of an accumu-

  indirect heat in the accumulated mass

  this heated in the hot zone and cooled in the

cold zone.

  The known heat accumulating masses consist of fixed plates or by elements

rigid of various structures.

  In many cases of technical application, and in particular for the exchange of heat between gases with a high content of dust and soot or polluted liquids, very encrusting is formed on the surface of the heat exchangers of known devices.

difficult to remove.

  the object of the present invention is to provide

  - heat transmitting elements allowing

  intensive and impeccable heat exchange which can be cleaned without complicated apparatus thermal and mechanical and corrosion, and whose internal cavity is filled with air or a gas such as nitrogen (N2)

  carbon dioxide (CO2) or a rare gas.

  In addition, the elements according to the invention can be used in the form of turbulent layers or layers.

at simply piled up.

  Unlike the known heat accumulating masses, the elements according to the invention move,

  during work, in turbulent layers or sim-

  heaped up The transmission of heat from a hot zone to a cold zone takes place by the cyclic transport of

  elements between hot and cold zones.

  In the hot space, the accumulation of heat in the elements is carried out by heating their wall After transporting the elements in the cold space, the transfer of heat takes place by cooling

Wall.

  The decisive advantage of the invention lies in the fact

  that the elements according to the invention are easy to clean

  toyer, cleaning themselves from the fact that they are

  used as turbulent or simple layers-

piled up.

  The elements according to the invention have a coeffi-

  * 25 oient thermal transmission high at the limit of the gas and the surface of the element in a turbulent layer. The invention is described below in detail with reference to some preferred, nonlimiting examples of embodiment shown in the accompanying drawings in which: FIG. 1 represents a diametral section of an element according to the invention, in the form hollow sphere; - Figures 2, 3, 4 and 5 show various modes of arrangement of the elements according to the invention in a Ljungstrbm heat exchanger; - Figure 6 shows the use of the elements according to the invention, in the form of a turbulent layer, dansun column heat exchanger, shown in vertical section; and FIG. 7 represents the arrangement of the elements according to the invention, in the form of a static layer, in a column heat exchanger, represented in vertical section. The element according to the invention, represented in FIG. 1, is presented under the shape of a hollow sphere 1 To The wall 2 of this sphere can be made of metallic or non-metallic materials

  Figures 2. 3 and 4 show the rotor of a é-

  Ljungstrbm 6 heat changer with vertical axis 7

  In the case of FIG. 2, the elements according to the in-

  vention 1 sound -: - placed above accumulated masses -

  conventional trices 8. In the case of FIG. 3, they are placed below. FIG. 4 represents a Ljungstrbm heat exchanger not containing conventional accumulating masses but only the

elements according to the invention 1.

  A In the four cases of FIGS. 2, 3, 4 and 5, the cold gas enters at 9 and the hot gas at 10. According to the direction in which the elements are swept by the gases,

  a static layer or a turbulent layer is formed

  slow. The turbulent layer therefore only forms when

  that the gas stream is introduced from below into the

  heat changer. If, for example, axis 7 of the ro-

  tor 6 is horizontal (case of FIG. 5) and the elements 1 are therefore arranged therein in a static layer,

  elements are cleaned by revolu-

  tion within the enclosure of each sector, without

  ter of additional energy consumption to ac-

  operate a blower. Figure 6 shows an e-

  column heat exchanger and turbulent layer in which (as in the case of Figure 7) the gas

  hot penetrates at 11, heats the elements 1, and leaves

  te the column in 12 while the cold gas enters

  in 13 and out in 14. The heated elements descend

  tooth by a device 15 up to the lower part

  column and are brought to the top of it by a conveyor system

  pneumatic or mechanical 16 not shown in detail.

  FIG. 7 represents a heat exchange column with a static layer in which the heated elements

  1, for example, via a cell wheel valve.

  slide 17, in the lower part of the column by separate charges, heat the cold gas there and are brought back to the upper part of the column by the

conveyor system 16.

Claims (2)

  1. Heat transmitting elements for heat exchange by regeneration, characterized in that said elements (1) consist of hollow bodies, the wall (2) of which is made of a material resistant to thermal and mechanical influences and to corrosion, and whose internal cavity (3) is filled with air or a gas such as nitrogen (N2), carbon dioxide (CO 2) or a rare gas.   2. As a new industrial process, use of the heat transmitting elements according to claim 1, characterized in that said elements are used in the form of a turbulent layer and / or a static layer in heat exchangers. heat by regeneration.