FR2629901A1 - ANTIRETOUR OF SMOKE - Google Patents

Abstract

A smoke arrester for a boiler heated by a burner comprises an exhaust hood 4 with an inclined flue gas inlet 2, disposed at the bottom, a flue gas outlet 5 opening into an exhaust pipe, and an air inlet 6 also arranged at the bottom. Between the part where the flue gases flow and that where the tertiary air circulates is provided a separation wall 8 forming with the plane of the smoke inlet 2 an acute angle. To ensure the evacuation of condensation water accumulating in this area, the lowest point of the flue gas inlet 2 is located above the flue pipes 1 of the boiler body 3 so that the water of condensation flows into the boiler where it is vaporized. For this purpose, the face of the separation wall 8 on the flue gas side can be provided with an inclined wall 9, the lower edge 10 of which extends into the flue gas duct of the boiler.

Description

The present invention relates to a smoke backstop

  for a boiler heated by a burner, with a

  inclined smoke, arranged at the bottom, an exit of fumes opening into a chimney or the like, and a

  air inlet arranged also downstairs.

  In particular the intermittent service of such devices,

  heated by a burner causes, due to the low temperatures

  boiler temperatures, a strong formation of water from

  condensation at the level of the exhaust hood, and this

  especially in the case where a smoke check with

  Tertiary air is attached to the hood. These waters

  condensation is the cause of corrosion, the present

  The purpose of the vention is to ensure its effective evacuation.

  This object is achieved according to the invention by the fact that on a smoke check of the type described above,

  the lowest point of the flue gas inlet is

  above the flues of the boiler body.

  This has the effect that the accumulated water of condensation

  in this zone, flows into the boiler where it

is vaporized.

  If the fumes intake is wider than the body

  of the boiler, the essentially vertical wall separates

- 2 -

  the part where the flue gases flow from that where

  the tertiary air, can be provided on the side of the fumes, an inclined wall whose lower edge extends

  in the flue of the boiler.

  The subject of the invention is represented by way of example

  in the figures of the drawing, namely FIG. 1 showing a section along the smoke check, according to I-I of FIG. 2, and FIG. 2 having a horizontal section along II-II

of fig. 1.

  The flue gas inlet 2 is connected directly to the flue ducts 1 of the boiler body 3, which presents

  a slope. The exhaust hood 4 is provided with its su

  of a smoke outlet 5 opening into a

  mined or similar, and extends laterally beyond

  smoke ducts 1 of the boiler body 3.

  This projecting portion of the exhaust hood 4 has on its underside a. entry 6 through which tertiary air arrives along arrow 7. This entry

  6 open towards the place of installation of the boiler.

  dière, serves as antiretour of smoke in case the evacuation of flue gas is insufficient, and is limited on the one hand by a side wall of the exhaust hood 4 and on the other by a partition wall 8, essentially

  vertically, which separates the part of the hood 4 o

  the flue gases of the part o circulates the air

tentiary.

  The wall 8 has on the flue gas side

  angled king 9 whose lower edge 10 extends into the flue gas duct of the boiler body 3. The

  condensation forming on this wall 9, flows

  in the smoke ducts 1 of the boiler body

3, where it is vaporized.

3-

Claims (2)

claims   1. Non-return smoke for a heated boiler   by a burner, with an inclined flue gas inlet,   laid down, an outlet of fumes opening into a   chimney or the like, and an air inlet arranged   below, characterized by the fact that the lowest point of the smoke inlet (2) is above   smoke ducts (1) of the boiler body (3).   2. Smoke arrestor according to claim 1 a-   with a wall separating the flue gases from the tertiary   re, characterized in that this partition wall   (8) is provided on the flue side, with an inclined wall (9)   born whose lower edge (10) extends into the smoke duit from the boiler.