DE8701543U1 - Device for any fired boiler - Google Patents

Description

Registrant: Rainer Rauwolf, Theodor-Heuss-Str. 68, 8070 Ingölstädt

Hugo Paril, Unterer Graben 33, 8070 Irigolstadt

Device for any fired boiler

The innovation relates to a device for heating boilers with any type of fuel that counteracts the formation of condensate and thus chimney sooting.

Condensation _or destructive chimney sooting regularly occurs when the so-called dew point is reached, which is always to be feared when, for example, the flue gas velocity drops when the chimney cross-section is too large, so that there is enough time for the flue gas temperature to be reduced considerably. There is no doubt that attempts have already been made to achieve higher flue gas velocities by reducing the chimney cross-section, but there were and still are limits to such attempts, which are so narrow that special chimney linings seem unavoidable.

The European patent application Ö06Ö345 has disclosed a device in the exhaust duct of oil or gas-fired boilers in which air is mixed with the exhaust gas to prevent condensate from forming. This is done using a fan that is controlled by a temperature sensor in such a way that a corresponding amount of air is mixed with the exhaust gas below a specified exhaust gas temperature.

Bank details: Bayerische Hypothekar- uivl Ufechsplbank

nto Mr. 648O223Q21

This known device is a component of the respective boiler, so that considerable changes must be made to it, unless the device is already provided for in the factory. Both measures, however, are very complex to construct, which meets with resistance in practice.

In contrast, the innovation aims at a device that, by the simplest means, prevents the dew point from being reached and thus chimney sooting with its associated dangers, without the need for complex modifications to the respective boiler _.

This aim is achieved according to the innovation in that the device consists of a casing that surrounds the exhaust pipe of the respective boiler concentrically and at a radial distance, which is closed on the boiler side opposite the exhaust pipe and with the other end engages in the chimney, with a fan for supply air being connected to the hollow cylindrical space between the exhaust pipe and the casing. This design is first of all impressive due to its simplicity, without disrupting the exhaust gas flow as such. The supply air, which forms a kind of jacket around the flue gases, warmed by the exhaust pipe, thanks to its hollow cylindrical shape, keeps the exhaust gases away from the "cooling" ¹ walls of the chimney, so that for this reason alone there is no need to worry about the dew point being reached, quite apart from the fact that the increased discharge speed achieved by the fan does more to slow down the temperature drop, which ultimately brings about the dreaded sooting of the chimney. Thanks to the innovative measures, it is sometimes even possible to dispense with special chimney linings.

According to a further feature of the innovation, the exhaust pipe, which is supported on one side by the boiler nozzle, is fixed at least on the chimney side by radial brackets opposite the casing which engages in the chimney, whereby the casing with its free end can be supported on the exhaust pipe via the rear air seal. This results in a sufficiently solid structure which does not give rise to any malfunctions and which previously

In order to avoid an air blockage in the hollow cylinder, which could adversely affect the outflow of the supply air in the form of a hollow cylinder, it is considered appropriate according to the innovation that the fan for the possibly preheated supply air is provided in a pipe socket that forms an acute angle with the casing and is placed on the casing. If, for example, the intake opening of the pipe socket is provided near the respective boiler, preheated air is sucked in by the fan, which is then further heated at the exhaust pipe, thus increasing the beneficial effect of the enveloping fresh air jacket. Particularly favorable conditions can be achieved if - as additionally provided - the supply air is preheated.

In order to avoid unnecessary energy consumption and to ensure that the supply air has a cooling effect on the chimney when the boiler is not in operation, it appears to be advantageous for the fan or its drive motor to be continuously coupled to the heating burner.

In order to be able to adapt the new device to different operating conditions, it is considered appropriate that the ends of the exhaust pipe and the casing protruding into the chimney can be moved and locked against each other.

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Furthermore, it appears to be advantageous if the casing with its air inlet pipe socket is arranged on the exhaust pipe in a way that it can be rotated and locked. This makes it possible to achieve extensive corrections in the effect of the new device.

The innovation is illustrated in the drawing, for example; shown are:

IP Fig. 1 dip new device between

a fireplace and a boiler in side view and
Fig. 2 an enlarged section along the line

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As can be seen from Fig. 1 of the drawing, the exhaust pipe 1 of a boiler 2 is inserted into a casing 3, which engages in a conventional cleaning sleeve 4 of a chimney 5. The exhaust pipe 1 and casing 3 form a hollow cylindrical space 6, for which reference should also be made to Fig. 2. The casing 3 carries a pipe socket 7, in which a fan 8 is installed. The pipe socket 7 forms an acute angle co with the casing 3, the tip of which points towards the chimney 5.

In order to ensure that the hollow cylindrical space 6 is maintained exactly, radial supports 9 are provided that are evenly distributed around the circumference and belong either to the casing 3 or to the exhaust pipe 1.

To prevent the supply air from escaping backwards, an annular disk 10 is provided, which can also serve as a support for the casing 3 on the exhaust pipe 1. In order to be able to change the position of the parts 1, 3 relative to one another, the radial supports are - as already indicated - only connected to one of the two parts 1, 3;

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They are secured against each other using an adjusting screw, for example

As can be seen from Fig. 1, the exhaust pipe 1 can extend beyond the casing 3, but this does not exclude the possibility that the exhaust pipe 1 ends at the dashed line marked 12. The elongated arrows 13 indicate the expected hollow cylindrical air flow, which envelops the exhaust gas flow indicated by short arrows 14 and leads it at increased speed to the end 15 of the chimney 5 equipped with a lining 16.

Claims (6)

t ■■ ·····■ OTTO GLÖSER ; ■· _ä · _o » ; _t · _{# #} ·· _{< t} · 8076 Baar-Ebenhausen 1 PATENT ATTORNEY ',/'.ti. '<>°.\.. '..' ! Sudetenstrasse 6 Telephone (08453) 7089 Authorised representative before the European Patent Office Patent Attorney O. GISsei· · Sudatenstr. 6, · 8076 Boar-Ebsnhauian 1 Baar-Ebenhausen 1, 28 . Cl . 1987 _M6ln z _e ,che&rdquor; 575/87/01 Gl/S Your sign Registrant: Rainer Rauwolf, Theodor-Heuss-Str. 68, 8070 Ingolstadt Hugo Paril, Unterer Graben 33, 8070 Ingolstadt Device for any fired boiler Protection claims 1. Device for any type of heating boiler, which counteracts the formation of condensate and thus the sooting of the chimney, characterized in that the device consists of a casing (3) which surrounds the exhaust pipe (1) of the respective heating boiler (2) concentrically and at a radial distance, which is closed off from the exhaust pipe (1) on the boiler side (cf. 10) and engages with the other end in the chimney (5), with a fan (8) for supply air being connected to the hollow cylindrical space (6) between the exhaust pipe (1) and the casing (3). 2. Device according to claim 1, characterized _in that the exhaust pipe (1) supported on one side by the boiler nozzle is fixed at least on the chimney side by radial brackets (9) relative to the casing (3) engaging in the chimney (5), whereby the casing (3) can be supported with the free end on the exhaust pipe (1) via the rear air seal (cf. 10), I I I I I I« Bank details: Boyorlsohs Hypotheken- und WschtelbanV Rllotottngolotadt Account No ₁ 6 480226021 3. Device according to claims 1 and 2, characterized in that the fan (8) for the possibly preheated supply air is provided in a pipe socket (7) which forms an acute angle (Pf) with the casing (3) and is placed on the casing (3). 4. Device according to claims 1 to 3, characterized in that the fan (8) or its drive motor is coupled to the heating burner. 5. Device according to claims 1 to 4, characterized in that the ends of the exhaust pipe (1) and the casing (3) projecting into the chimney (5) can be displaced and locked against one another (cf. 11). 6. Device according to claims 1 to 5, characterized in that the casing (3) with its air supply pipe socket (7) is arranged on the exhaust pipe (1) in a rotatable and lockable manner (cf. 11). ' ' I < I I I I I ' ' ' · » I III Il