DE2128809C3 - Oil-heated lintel burner - Google Patents

Description

The invention relates to an oil-heated lintel burner with a combustion chamber which is open at the bottom and which is inserted into a Liquid container is submerged.

From DE-PS 6 63 506 an immersion burner for heating liquids with an open at the bottom, in a liquid container immersed combustion chamber is known. The combustion chamber has a continuous appearance downward widening upper part, which is followed by the cylindrical part open at the bottom.

In the combustion chamber, gas introduced under pressure (or previously gasified) is introduced through a supply pipe liquid fuel) burned.

In a conventional oil-heated burner, the oil is atomized beforehand and then when it is introduced into the Combustion chamber vaporized by heat radiated from a refractory lining of the combustion chamber. the Refractory lining makes the production of the combustion chamber more expensive and worsens the heat transfer.

With a burner of this type immersed in liquid, the refractory lining would be shattered, when it comes into contact with the liquid. It would also come into contact with the liquid standing outer wall of the combustion chamber remain relatively cool and therefore do not radiate enough heat to to evaporate the oil droplets.

The invention is based on the object of bringing about evaporation of the oil droplets, thereby a satisfactory combustion takes place

According to the invention, this object is achieved with the design of the lintel burner characterized in claim 1 solved

The stepped expansion in the wall of the combustion chamber causes considerable turbulence in the oil droplets and in the fuel gas and thus brings the oil droplets into intimate contact with the fuel gas, what in contrast to the conventional oil-heated

ίο burner for a satisfactory heat transfer leads from the burning, vaporized oil to the oil droplets that follow Reliable and stable flame is generated. In addition, it is not necessary to use the combustion chamber lining with refractory material.

Further advantageous refinements of the invention emerge from the subclaims.

The invention is explained below in an exemplary embodiment with reference to the drawing

The lintel burner shown in the drawing contains an oil-burning atomizer 10 of the conventional type Kind that is directed downward into a combustion chamber 14. The combustion chamber 14 has steel walls of uniform thickness and consists of an upper conical part 15 which extends from the atomizer 10 widened downwards to the upper conical part 15 is a cylindrical central part 16, which has the same diameter as the lower end of the upper part 15 at the lower end of the middle Part 16 is a step-like cross-sectional enlargement 17, which the lower end of the middle Part 16 connects to the upper end of a lower cylindrical part 18. The lower part 18 has a larger diameter than the central part 16.

At the lower end of the lower part 18 a flat circular plate 19 is provided, which to the lower The end is spaced and held by four supports 20.

It has been found that there is a critical minimum length for the lower portion 18 of the combustion chamber 14, which is defined by the fact that the ratio of this length to the diameter should be between 1.5 and 0.5.

The combustion chamber 14 is attached to a flat plate 25 and the water level can between the The limits indicated by the level lines 26 and 27 vary.

If these dimensional proportions are observed, a stable flame can be generated, with the water in Contact with the outside of the combustion chamber 14 and the flame in contact with the inside of the Combustion chamber 14 is stationary As the wall is cooled by water, it cannot be destroyed. Simultaneously a good heat transfer is still achieved. The lintel burner is still with a pilot burner 30 Mistake. This consists of a narrow cylindrical gas combustion chamber 31, which is located on one side of the Lintel burner is arranged and extends vertically. There is a at the top of the pilot burner Inlet pipe 32 through which a mixture of gas and air is introduced into the pilot burner 30. in the There is a small opening 33 at the bottom of the pilot burner Pilot burner, a lateral channel 34 is provided, which into the combustion chamber 14 of the lintel burner flows out. The pilot burner 30 is also provided with an ignition tube 37, which extends from the Pilot burner extends from to a point which is above the surface of the water. At this point that is

Ignition tube provided with an ignition mechanism 38 and a ventilation valve 39.

The oil combustion chamber 14 and the gas combustion chamber 31 can be provided with ram detectors 42 and 43 be, which respond to the ultraviolet radiation of the flames and serve to supply the oil or gas throttle if the flame build-up becomes too strong.

When the burner according to the invention is to be put into operation, the fans 50 and 51 Air into the oil combustion chamber 14 and the gas combustion chamber ι ο mer 31 bevelled to completely displace the water from the system. Then one will Gas connection 52 via a venturi device 53 and the inlet pipe 32 gas together with one for the Combustion, a suitable proportion of air is introduced into the gas combustion chamber 31, the ventilation valve 39 is opened to allow some gas to flow into the ignition tube 37. The penetrated into the ignition tube 37 Gas is then ignited with the aid of the ignition mechanism 38, so that in the gas combustion chamber 31 a Gas flame forms The amount of gas flowing into ignition tube 37 is determined by a throttle 40, which is contained in the ventilation valve 39, so that the flame back into the gas combustion chamber after ignition 31 then the oil supply is switched on and the gas flame, which passes through the channel 34 in the oil combustion chamber 14 reaches the ignited oil. if if desired, the gas flame can now be turned off by opening the upper end of the pilot burner 30 either sealed or by allowing air to flow into this part of the system.

The opening 33 at the bottom of the pilot burner 30 is therefore provided to prevent explosions when the gas is ignited and thus prevent damage to the air compressor.

Propane is preferably used as the ignition gas, but other gaseous fuels are also suitable.

1 sheet of drawings

Claims (6)

Patent claims: 1. Oil-heated lintel burner with a combustion chamber open at the bottom, which is placed in a liquid container is immersed, characterized in that that the combustion chamber (14) has a step-like cross-sectional widening in the lower region (17) and that the wall of the combustion chamber (14) consists of metal and in the upper and lower Area has the same wall thickness. 2. Lintel burner according to claim 1, characterized in that the combustion chamber (14) has a has circular cross-section and that the ratio of the length to the diameter of the below the cross-sectional enlargement (17) lying lower part (18) is about 0.5 to 1.5. 3. Lintel burner according to claim 1 or 2, characterized in that the combustion chamber (14) has a has continuously expanding downward upper part (15) to which a middle cylindrical part (16) adjoins, which over the step-like cross-sectional expansion (17) with the lower cylindrical open at the bottom part (18) is connected 4. Lintel burner according to Claim 1 to 3, characterized in that a plate on the lower part (18) (19) is arranged at a distance. 5. Lintel burner according to claim 1 to 4, characterized in that on one side of the combustion chamber (14) a pilot burner (30) is arranged, which through a channel (34) with the combustion chamber (14) connected is 6. Lintel burner according to claim 1 to 5, characterized in that the combustion chamber (14) with a flame detector (42) responsive to the ultraviolet radiation of the flame.