DE3626483A1

DE3626483A1 - Chimney renewal insert

Info

Publication number: DE3626483A1
Application number: DE19863626483
Authority: DE
Inventors: Edgar Dipl Ing Rammo
Original assignee: WET WAERME ENERGIETECHNIK GmbH
Current assignee: BALDAUF, MIKE, 6683 SPIESEN-ELVERSBERG, DE
Priority date: 1986-08-05
Filing date: 1986-08-05
Publication date: 1987-04-23

Abstract

The chimney insert serves for renewing domestic and industrial chimneys with a flue gas capacity for boilers up to 1000 kW. It is produced in one piece in tubular special steel and is introduced into the chimney to be renewed by means of a building crane. Around the special steel tube is a water cooling jacket with dished ends and a helical water flow pipe is welded in from the bottom to the top inside the jacket. When the chimney renewal insert has been introduced, the water cooling jacket is connected by its first connection nozzle to the heating return line directly before the heating boiler in the partial flow. The water is fed upwards inside the jacket to just below the upper end and emerges in a jet-like manner, and subsequently flows down inside the jacket in order to be removed at the second connection. During this process, the heating water cools the flue gases down to the value of the heating return temperature and simultaneously absorbs this residual energy. Depending on the temperature level of the heating return line, even the utilisation of the latent heat in the flue gas region, e.g. at return temperatures below 45 DEG C is successful.

Description

Der Schornsteineinsatz dient zur Verringerung des Querschnittes von Schornsteinen nach DIN 18 160, erforderlich durch Befolgung des Energieeinsparungsgesetzes mit weniger Energiebedarf und kleineren Kesselleistungen bei niedrigeren Abgastemperaturen. Er verhindert materialbedingt den Eintritt von sich bildendem Kondenswasser in die Schornsteinwand.The chimney insert is used to reduce the cross section of Chimneys according to DIN 18 160, required by following the Energy Saving Act with less energy consumption and smaller boiler outputs at lower exhaust gas temperatures. It prevents due to the material the entry of condensed water into the chimney wall.

Das Wasser wird über eine unten befindliche Granulatlage neutralisiert und zum Kanal geleitet.The water is neutralized via a granulate layer at the bottom and headed to the canal.

Die Ummantelung als Boiler ausgebildet, ermöglicht bei mindestens 5 m Mantellänge die Abführung der Rauchgasrestwärme bis auf die Systemrücklauftemperatur (z.B. 28 Grad C) in den Rücklauf des Wärmeübertragungssystems.The casing, designed as a boiler, enables at least 5 m Jacket length the discharge of the residual flue gas up to the system return temperature (e.g. 28 degrees C) in the return of the heat transfer system.

Hierzu sind am unteren Boilerboden ein Heizungswasserauslauf als normaler Stutzen und ein Heizungswassereinlauf, als Rohrwendel hoch geführt bis unter den oberen Boilerboden, mit Düsenboden angeschweißt.For this purpose, there is a heating water outlet on the lower boiler floor as normal Spigot and a heating water inlet, led up as a spiral pipe to below the upper boiler floor, welded to the nozzle floor.

Eine Entlüftung mit Leitung längs des Boilers nach unten zusammen mit einem Sicherheitsventil und Ausdehnungsanschluß, erlaubt einen normalen Heizungsbetrieb.A ventilation with line along the boiler down together with a safety valve and expansion connection, allows a normal one Heating operation.

Die angebauten Rauchrohrstutzen und Putzklappen entsprechen den Erfordernissen der DIN 18 160.The attached flue pipe sockets and cleaning flaps meet the requirements DIN 18 160.

Die Wärmerückgewinnung aus den Rauchgasen bis auf die Heizungsrücklauftemperatur wird durch den Anschluß des Einsatzes an den Heizungsrücklauf vor dem Kessel kombiniert mit Ladepumpe (30% Kesselleist.) und den erzwungenen Wasserweg im Gegenstrom-Kreuzstromverfahren durch Rohrwendel und Düsenboden, bei ausreichender Boilerlänge, erreicht. Auskühlungsverluste verhindern im Innenrohr ein eingebauter Rohrabschluß dichtschließend hinter dem Kessel und eine Perliteauskleidung um den Einsatz herum im gesamten Altschornsteinbereich, einzubringen vor Montage der oberen Abdeckung.Heat recovery from the flue gases up to the heating return temperature is achieved by connecting the insert to the heating return in front of the boiler combined with charge pump (30% boiler output.) and the forced waterway in countercurrent-crossflow Pipe coil and nozzle bottom, with sufficient boiler length, reached. Cooling losses prevent a built-in pipe closure in the inner pipe tightly closing behind the kettle and a pearlite lining around the entire chimney area before installing the top cover.

Parts list. 1. Inner pipe made of stainless steel V4A, 1.4571 welded in one piece, wall thickness at least 3 mm, overall length according to the old chimney, pipe cross-section as required.
2. Outer jacket, at least 3 mm wall thickness, minimum overall length 5 meters, inner diameter = inner tube diameter + 60 mm, welded outlet, inlet with spiral, nozzle ring and nozzles, overflow with ventilation pipe.
3. Emptying nozzle with overflow pipe and marking valve.
4. Screwable upper stainless steel cover plate with side cover frame to compensate for the expansion.
5. Pearlite filling compound for thermal insulation.
6. Tightly closing flue gas shut-off valve switched depending on the burner device.

Claims

1. To reduce the chimney cross section, one out of one Manufactured stainless steel pipe 1.4571 with at least 3 mm wall thickness with welded-on cleaning flap and embedded smoke pipe socket. as well as base plate and upper cover ring from above by means of Crane installed in the old chimney.

2. At least 5 m long jacket with 2 Floors welded watertight as a boiler.

3. On the lower floor there is an outlet nozzle and one around the inner tube spiraling inlet pipe welded in, the inlet pipe due to its outer dimensions, an inner water channel enforces.

4. At the top of the inlet pipe is just below the welded on the upper floor a nozzle ring for water outflow, the a uniform flow over the entire boiler cross-section enforces.

5. There is a spout on the inner tube below the cleaning flap welded with shut-off and overflow, so when filled the existing cavity with calcareous granules, the neutralization of the draining condensate is reached. The dwell time is dependent on the height marking Boiler output, flue gas outlet temperature, system temperature, Pipe cross-section determined and thus the neutralization time and the resulting or desired pH value of the wastewater fixed.