SE436792B

SE436792B - Solid fuel boiler with secondary combustion catalysts and flue gas by-pass for regulating the temperature of a chimney

Info

Publication number: SE436792B
Application number: SE8003665A
Authority: SE
Inventors: Per Anders Ake Jonsson
Original assignee: Per Anders Ake Jonsson
Priority date: 1980-05-16
Filing date: 1980-05-16
Publication date: 1985-01-21
Also published as: SE8003665L

Abstract

A device on a heating boiler with a heat-insulated primary and secondary combustion chamber. On its way to the combustion chamber, the combustion air comes into contact with the outside of the combustion chamber insulation (15). The combustion gases affect the catalysts (13) in the form of fireproof rods in the secondary combustion chamber and can be shunted past the flue gas pipe (22) during their flow to the chimney or similar in a heat reservoir via an insulated pipe (23) with a valve (24).<IMAGE>

Description

15 25 ”ïïöﬁﬁuf soosses-o - QUALITY - 2 P; ett spjäll 20 är så svëngbart, att förhållandet mellan lníttillförseln till de båda grenarna 18, 19 är inställ- bart, såsom visas på ritningen. Pannans luftmantel är därvid också delad med delarna anslutna gren l8, 19. 15 25 ”ïïö ﬁﬁ uf soosses-o - QUALITY - 2 P; a damper 20 is so pivotable that the ratio of the supply to the two branches 18, 19 is adjustable, as shown in the drawing. The air jacket of the boiler is then also divided by the parts connected branch l8, 19.

Förbränningsgaserna strömmar från eldstaden till det till var sin sekundära förbränningsutrymmet 12, där en så fullständig förbränning som möjligt sker. Därifrån strömmar gaserna till ett utrymme 21, som upptill begränsas av ett vattenmagasin med genomgående vertikala rökgasrör 22, vilka företrädesvis är anordnade i en cirkel runt ett centralt, isolerat rör 23, vilket är tillslutbart medelst en lucka 24. Vid nor- mal drift är luckan 24 stängd så att gaserna strömmar ge- nom rören 22 för värmeavgivning. Gaserna strömmar sedan ut genom utloppet 25. I synnerhet vid start av pannan öpp- nas luckan 24, så att gaser kan utströmma genom röret 23 utan värmeavgivning för uppvärmning av rökgasutlopp och skorsten. I övrigt inställes luckan 24 så, att rätt skor- stenstemperatur erhålles. I anslutning till utrymmet 21 kan en gas- eller oljebrännare 26 vara anordnad, vilken kan utnyttjas i de fall eldning med fasta bränslen icke sker.The combustion gases flow from the fireplace to the respective secondary combustion chamber 12, where as complete a combustion as possible takes place. From there the gases flow to a space 21, which is bounded at the top by a water reservoir with continuous vertical flue gas pipes 22, which are preferably arranged in a circle around a central, insulated pipe 23, which is closable by means of a door 24. In normal operation the door is 24 closed so that the gases flow through the pipes 22 for heat dissipation. The gases then flow out through the outlet 25. In particular when starting the boiler, the door 24 is opened, so that gases can flow out through the pipe 23 without heat dissipation for heating the flue gas outlet and the chimney. Otherwise, the door 24 is set so that the correct chimney temperature is obtained. In connection with the space 21, a gas or oil burner 26 can be arranged, which can be used in cases where firing with solid fuels does not take place.

På bifogade ritning visas pannan utformad i två de- lar, vilket kan vara fördelaktigt i vissa fall men givet- vis kan de båda delarna sammanslås till en enhet. Reg- leringen av rökgastemperaturen kan förutom medelst luckan 24 ske genom att övriga rör 22 också förses med luckor eller att den övre änden på dessa rör delvis täckes, t ex med tegelstenar, så att lämpliga utloppsöppningar erhålles. Det isolerade röret 23 kan också vara anordnat utanför vattenbehållaren, t ex på pannans utsida.The accompanying drawing shows the boiler designed in two parts, which can be advantageous in some cases, but of course the two parts can be merged into one unit. The control of the flue gas temperature can, in addition to by means of the door 24, take place by providing the other pipes 22 with doors or by partially covering the upper end of these pipes, for example with bricks, so that suitable outlet openings are obtained. The insulated pipe 23 can also be arranged outside the water container, for example on the outside of the boiler.

Claims

Claim device Boiler for heat recovery from solid fuels, comprising a primary combustion chamber, which is deliverable fuel via a preferably horizontal fuel supply hatch (11) and in which the fuel is gasified, a secondary combustion chamber (12) , which is supplied to the gas stream from the primary combustion chamber and has catalysts (13) projecting into the gas stream, and means for optimizing the heat output after the catalysts (13), characterized in that the catalysts (13) consist of the entire secondary the combustion chamber (12), across the gas flow direction extending ceramic rods and that the optimizing means consists of an insulated duct (23), which is connected in parallel with flue gas pipes (22) in a water reservoir and has a damper (24), enabling shunting of the desired amount of combustion gas past the flue gas pipes to the chimney or equivalent.