FR2677738A1 - MULTIPLE VERTICAL HEATING BOILER. - Google Patents

Abstract

Any deposit of condensate from the heating gases should be avoided, without costly special arrangements, even at low return temperatures. For this, the boiler is constructed in such a way that the cold return water inlet zone is entirely subjected to the action of hot heating gases and that at its inlet the twist water (2) is directed against the strongly heated parts (10) which are in this zone.

Description

1 - The invention relates to a multiple heating boiler

  sections consisting of vertical boiler sections

  shims which each have an upper inlet pipe and a lower return pipe in which the communicating water conduits delimit a combustion chamber and conduits for the gas

of heating.

  In heating boilers in general and also

  ment in multi-sec heating boilers

  tions, a problem may arise from the fact that the return water, cold, causes, on the heating side, overshoots of the dew point. An aggressive zondensate is formed which can destroy the surfaces of

the heat exchanger.

  Several solutions have already been envisaged to avoid these displacements of the dew point. Thus the patent DE U 82 07 592 recommends a solution consisting in subdividing the enclosure containing the water into an exterior zone and into an interior zone and to

  introduce the cold return water into the external area

  which is not subjected to the action of the heating gases Other devices are also known which provide a dtviationj 3 u fluid current, for example by an internal deflection conduit, canme indicates the patent DE-39 28 535 AI In practice, we also use a

  external deviation to raise the uempératurt = back.

  In this device, the return temperature is measured and, in the event of a displacement of a determined value, we

  add hot water to the inlet side This operation

  temperature rise ration obviously involves

significant costs.

  The object of the invention is the realization, without considerable costs, of a heating boiler with several sections yes works without any training

of condensation water.

  -2- This object is achieved, according to the invention, due to the fact that the inlet zone of the cold return water is entirely subjected to the action of the heating gases and that on its entry the return water is directed on the strongly heated walls which are in this zone. This meeting of the heating gas and water currents always causes an immediate rise in the

  return temperature before the return water is repaired

  weaves in the water conduits It is no longer necessary to cause the temperature to rise by adding hot water resulting in installation and adjustment costs It is also not necessary to avoid heat exchange with cold return water On the contrary, it is necessary to seek

  heat exchange, but under specific conditions

  born. In the multi-section heating boiler described, the inlet area for the cold return water is formed by the lower return pipe. It is advantageous that when the gases pass from the combustion chamber into the ducts of heating gas, they are directed to the return pipe It is very

  easy to achieve this result by placing between the sec-

  boiler positions adjacent to the sealing strips leaving free above the upper part of the return pipe openings for the passage of the fluid between the combustion chamber and the heating gas conduits These heating gases, still very hot are therefore intentionally directed towards the return pipe, the upper wall of which is, therefore, strongly heated. What is essential in this case is that by limiting in a definite manner these passage openings one obtains a high speed of the heating gases in the transition zone and 3 -

  that we avoid the formation of blind spots in the circulation

  tion of the heating gases Otherwise, the flow conditions would prevent the desired effect being obtained In this critical transition zone, the movement of the heating gases must not stop, which would cause cooling and dew point overruns,

  On the other side, it is necessary to pocket that the water of re-

  cold tower enters the water conduits without being passed over the strongly heated parts For this, it is possible to have, in the container containing water in each section of the boiler, guide ribs or other guide elements placed on the side, which, when the return water arrives, direct it, if necessary as by an injection device, on the heated parts The same result can also be obtained by giving a suitable shape to the transition zone between the inlet tubing and the

water pipes.

  The invention is described below in more detail by means of an exemplary embodiment

  of a boiler section, referring to the drawing.

  The boiler section comprises an inlet pipe 1 and a return pipe 2 Water pipes put the two pipes 1, 2 into communication and delimit a combustion chamber 4 and

  ducts 5 for heating gases A strip of water

  outside heat 6 prevents any escape of gases from

  heating outside An integrated sealing strip

  7 separates the combustion chamber 4 from the heating gas conduits This sealing strip 7 is only interrupted above the return pipe 2 Therefore, the device has a passage opening 8 which allows to the cold return area of

  directly undergo the action of the heating gas current.

  4- the enclosure containing the water comprises, on the sides of the zone 2, guide ribs 9 which pocket the direct penetration of the cold return water into the water conduits 3 These ribs on the contrary direct the cold water, as by an injection, on the heated walls 10 on the side of the heating gases A heat exchange carried out under these conditions prevents any

formation of condensation water.

-

Claims (1)

  1 Heating boiler with several sections constituted by vertical boiler sections which each have an upper inlet pipe and a lower return pipe and in which communicating water conduits delimit a combustion chamber and conduits for bs gas heating, characterized in that the inlet area of the cold return water is entirely subjected to the action of the heating gases and that, at its inlet, the return water is directed onto the highly heated walls which are located in this zone * 2 multi-section heating boiler according to claim 1, characterized in that when the heating gases pass from the combustion chamber (4) into the heating gas pipes (5), they are directed to the cold return water inlet area, i.e. to the lower return pipe (2) and in that the cold return water which enters the return pipe ( 2) is directed to the parts (10)   which are strongly subjected to the action of heating gases   fage. 3 Heating boiler with several sections according to one   claims 1 or 2, characterized in that   sealing strips (7) placed between neighboring boiler sections leave free, above the lower return pipe (2), passage openings (8) for the fluid between the combustion chamber (4) and the heating gas conduits (5) and in that the   container with water in each section of boiler   the latter has guide ribs (9) which direct the cold return water to the parts (10) strongly   subject to the action of heating gases.