SE454910B

SE454910B - SET AND DEVICE TO IGNIT THE FUEL WITH COLD DISULPHIDE MIXED WITH HOT AIR, WHICH MIX MIXS

Info

Publication number: SE454910B
Application number: SE8400941A
Authority: SE
Inventors: J Secker
Original assignee: Babcock Werke Ag
Priority date: 1983-04-22
Filing date: 1984-02-21
Publication date: 1988-06-06
Also published as: GB2138558B; GB2138558A; SE8400941L; GB8405375D0; DE3314675A1; SE8400941D0

Description

454 .910 . -I 2 Blandningskammaren 2 innehåller en central kanal 7 F som är förbunden med anslutningen 4 för det lättantändliga mediet. Den centrala kanalen 7 är omgiven av en ringkanal 8 som står i förbindelse.med anslutningen 3 för luften. Bå- da kanalerna 7, 8 är vid sin framände tillslutna med en plåt 9 i vilken utloppsöppningar 10, 11 är anordnade. Vid den i fig 2 visade blandningskammaren 2 är axlarna i den centrala kanalens 7 utloppsöppningar 10 anordnade divergerande. Ring- kanalens 8 utloppsöppningar 11 är i förhållande till bland- ningskammarens 2 längdaxel riktade dels konvergerande och dels axiellt. Genom denna inriktning av utloppsöppningarnas 10, 11 axlar får de utkommande strålarna en riktning som med- för en blandning av medium och luft. 454 .910. -I 2 The mixing chamber 2 contains a central channel 7 F which is connected to the connection 4 for the flammable medium. The central duct 7 is surrounded by an annular duct 8 which communicates with the connection 3 for the air. Both channels 7, 8 are closed at their front end with a plate 9 in which outlet openings 10, 11 are arranged. At the mixing chamber 2 shown in Fig. 2, the axes in the outlet openings 10 of the central channel 7 are arranged diverging. The outlet openings 11 of the ring channel 8 are directed in relation to the longitudinal axis of the mixing chamber 2, partly converging and partly axial. Due to this alignment of the axes of the outlet openings 10, 11, the outgoing jets get a direction which results in a mixture of medium and air.

Vid blandningskammarens 2 utgång är ett temperaturmät- ställe 12 anordnat.At the outlet of the mixing chamber 2, a temperature measuring point 12 is arranged.

I vardera av tilledningarna 5, 6 är ett reglerorgan 13 och en backventil 14 anordnade. I tilledningen 6 är insatt en pump 15 enär det lättantändliga mediet förutsätts vara fly- tande vid rumstemperatur. Tilledningen 5 för luft är försedd med en fläkt 16 och dessutom dragen genom en uppvärmnings- anordning 17 som kan vara en elektrisk vägguppvärmningsan- ordning. Uppvärmningsanordningen 17 kan undvaras om kompri- merad luft införs i eldstaden 1 under tryck. I detta fall har luften genom komprimeringen fått tillräckligt hög temperatur.In each of the lines 5, 6 a control means 13 and a non-return valve 14 are arranged. A pump 15 is inserted in the line 6, since the flammable medium is assumed to be liquid at room temperature. The supply line 5 for air is provided with a fan 16 and is also drawn through a heating device 17 which can be an electric wall heating device. The heating device 17 can be dispensed with if compressed air is introduced into the fireplace 1 under pressure. In this case, the air has reached a sufficiently high temperature through the compression.

Den beskrivna blandningskammaren arbetar på följande sätt. Fläkten 16 blåser genom tilledningen 5 luft in i bland- ningskammarens 2 ringkanal 8. Den tillförda luften uppvärms genom uppvärmningsanordningen 17. Det lättantändliga mediet, t ex koldisulfid, förs nu av pumpen 15 genom tilledningen 6 in i blandningskammarens 2 centrala kanal 7. Därvid ställs flödesproportionen medium/luft in så att en šjälvantändande blandning bildas i blandningskammaren 2. Vid koldisulfid måste mediets volymdel i blandningen ligga mellan 1 och 55%.The described mixing chamber operates in the following manner. The fan 16 blows air through the line 5 into the annular duct 8 of the mixing chamber 2. the medium / air flow ratio in so that a self-igniting mixture is formed in the mixing chamber 2. In the case of carbon disulphide, the volume fraction of the medium in the mixture must be between 1 and 55%.

Därvid måste den genom den varma luften uppvärmda blandningen ¿\ ha en temperatur av minst 124°C. Under dessa.förhållanden ¿ självantänder medium-luft-blandningen och inleder bränslets tändning i eldstaden 1. Genom temperaturmätstället 12 vidThe mixture heated by the hot air must have a temperature of at least 124 ° C. Under these conditions ¿the medium-air mixture ignites automatically and starts the ignition of the fuel in the fireplace 1. Through the temperature measuring point 12 at

Claims

The output of the mixing chamber 2 can be monitored with the temperature level required for self-ignition and the temperature rise effected by complete ignition. As a flammable medium, in addition to carbon disulfide, any food can be used; liquid or gaseous medium which directly or in vapor form forms a self-igniting mixture with air at a relatively low temperature. P a t e n t k r a v:

1. A method of igniting fuels in hard-to-reach or dusty fireplaces, characterized in that a flammable medium consisting of carbon disulfide is blown into the fireplace and mixed with air in such a proportion that a self-igniting mixture is obtained, the air being heated to a such temperature that the temperature after mixing is above the temperature required for self-ignition of the mixture.

2. A method according to claim 1, characterized in that the temperature conditions are monitored by measuring the temperature behind the mixing point.

Device for carrying out the method according to claim 1 for igniting fuels in hard-to-reach or dusty fireplaces, characterized in that it has means (6, _7, 10, 15) for injecting a flammable medium consisting of carbon disulfide and further means (3 5, 11, 16) to blow air into a mixing chamber (2) arranged in the fireplace (1) in such a mixing proportion that a self-igniting mixture is formed, the air being blown in at such a temperature that the temperature after mixing is above the auto-ignition temperature of the mixture.

Device according to Claim 3, characterized in that a temperature measuring point (12) is arranged at the outlet of the mixing chamber (2).

Device according to Claim 3 or 4, characterized in that the air is heated by a heating device (17) before blowing.

Device according to one of Claims 3 to 5, characterized in that the mixing chamber (2) consists of a central channel (7) for the flammable medium and an annular channel (8) for the air surrounding the central channel (7), and that both channels (7, 8) on the outlet side are covered by a plate with outlet holes (10, 11).

Device according to claim 6, characterized in that at least a part of the outlet holes (10) belonging to the central channel (7) has a divergent axis direction, and that at least a part of the outlet holes (11) belonging to the ring channel (8) has converging axis direction.