JPH01266409A - Flame propagating burner - Google Patents

Abstract

PURPOSE:To attempt to make clean the discharged gas by providing an oxidizing filter to the tip-end ignition section of a straight-pipe combustion chamber and letting the discharged gas in combustion pass through the oxidizing filter to oxidize and remove by the oxidizing filter poisonous gases contained in the discharged gas in combustion such as unburned gases. CONSTITUTION:An oxidizing filter 3 is provided on the downstream side of an ignition source 2 which is provided to the ignition section A at the tip end of a combustion chamber 1 in straight pipe shape. In a flame propagating combustion action in which charging and discharging, ignition, combustion, and fire extinguishing area repeated in cycle continuously the discharged gas in combustion in the preceding cycle is pushed out by the charged gas to discharge the discharged gas through a discharging pipe 7 out of the device during the charging action to supply a mixture of gases to the combustion chamber 1 in the next cycle. The oxidizing filter 3 is heated by the passage of the discharged gas in combustion through it and at the same time the filter 3 oxidizes poisonoue gases such as unburned gases, products in combustion, etc., which are contained in the discharged gas in combustion to make exhaust gases clean and discharge them through the discharging pipe 7 out of the device. Accordingly no discharged gas containing poisonous gases such as carbon monoxide is discharged out of the device.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention is a combustion method in which a cycle of air supply, exhaust, ignition, combustion, and extinguishing is carried out continuously (9 times) in a straight-tubular combustion chamber, and the flame front propagates through the cycle. The present invention relates to a propagation combustion device.

[Conventional technology]

The conventional propagation combustion device of this building has a straight pipe combustion chamber (17 base extinguishing part (B)') that controls the flow velocity of the flame flow during extinguishing, as shown in Fig. 9. A companion constriction section (57) is provided for rapid changes, and a mixing chamber (6
At the same time, an ignition heater (27) is provided at the tip ignition site W, and an exhaust pipe (77 is connected to the straight combustion chamber (1r) on the downstream side of the ignition heater (27). established,
It has a structure in which a gas nozzle (87) is located on the base end mixing chamber (6F) and a primary air intake port (9F) is exposed around the circumference.

[Problems that people try to invent or solve]

The propagation combustion device uses a combustion method in which the cycle of supplying and exhausting air, ignition, combustion, and extinguishing is continuously repeated in the straight-tubular combustion chamber, and the flame front propagates in each cycle. During ignition and extinguishing, a very small amount of unburned gas may remain in both the ignition point W at the tip of the fire extinguisher and the extinguishing point R at the base fire extinguishing point, and incomplete combustion may occur due to a drop in flame temperature. However, in the conventional propagation combustion equipment mentioned above, no measures are taken to deal with residual unburnt gas, etc. There was a problem that it contained toxic gases such as unburned gas.

In view of this problem, the present invention aims to provide a propagation combustion device that cleans exhaust gas by oxidizing and removing toxic gases such as unburned gas contained in combustion exhaust gas using an oxidation filter.

[Failure to solve the problem]

In order to achieve the above object, the propagation combustion device according to the present invention employs propagation combustion, a combustion method in which the cycle of air supply and exhaust, ignition, combustion, and extinguishing is continuously repeated in a straight-tubular combustion chamber, and the flame front propagates. In the device, a member, etc., in which a catalyst such as platinum is supported on a heat-resistant and corrosion-resistant carrier such as ceramic nuforme, etc., is provided at the tip ignition part of the straight tube-shaped combustion chamber and is placed downstream of an ignition source such as a 92 chrome wire. The combustion exhaust gas is equipped with a good oxidation filter, and the combustion exhaust gas passes through the oxidation filter to oxidize and remove toxic gases such as unburned gases contained in the combustion exhaust gas before being discharged. It is.

Further, a second aspect of the present invention provides that an afterburner is provided near the oxidation filter to heat the oxidation filter to a degree necessary for activation, and the afterburner quickly and reliably heats the oxidation filter to the optimum temperature for activation. This makes it possible to more efficiently oxidize toxic gases such as unburned gas. Note that if the heating temperature of the oxidized filter by the afterburner is too high, it cannot be activated, and the oxidized filter is severely burned out, and even if the heating temperature is too low, it cannot be activated. Therefore, in order to obtain the optimum heating temperature for activating the oxidation filter, a surface combustion type radiation burner is suitable as the afterburner.

In addition, the main straight tubular combustion chamber may be a continuous tubular combustion chamber, even if there is a bend in the middle.

[For production]

The propagation combustion device of the invention of NFCN Claim/Constructed as described above, in the continuous repetition of air supply and exhaust, ignition, combustion, and extinguishing cycles, the air supply operation in the next cycle burns the previous cycle. The exhaust gas is pushed out and released, but when this combustion exhaust gas is released, it passes through an oxidation filter provided on the downstream side of the ignition source, thereby removing toxic gases such as unburned gas contained in the combustion exhaust gas. Because the gas is completely oxidized, exhaust gas containing toxic gases such as carbon monoxide is not released outside the device, making the exhaust cleaner.

Furthermore, if the oxidation filter of claim 2 is heated to the optimal temperature for activation using an afterburner, the activation will be rapid, although it will take some time for the oxidation treatment effect to be exerted by heating only with exhaust heat. Furthermore, the oxidation treatment of toxic gases such as unburned gas contained in combustion exhaust gas can be performed more efficiently.

〔Example〕

Embodiments of the propagation combustion apparatus according to the present invention will be described below with reference to the drawings.

In the embodiment of claim 1 shown in FIG.
(1) is a straight pipe-shaped combustion chamber, and on the upstream side of the combustion chamber, that is, at the base extinguishing area 7, there is a constriction that rapidly changes the flow velocity of the flame flow during extinguishing and provides a barrier to ensure extinguishing. Part (EI) Tj: 0 (2) is integrally formed by squeezing processing, etc., and the mixed mold (6) is continuously expanded and formed on the upstream side of the narrowed part (5). An ignition source installed on the downstream side of the straight-tubular combustion chamber (υ, that is, at the ambulatory ignition site (A), for example, using a nichrome wire, an ignition lamp, a ceramic heater, a pilot burner, etc.). (3) An oxidation filter provided on the downstream side of the ignition source (2) allows combustion exhaust gas from the combustion chamber (1) to pass through the oxidation filter (8) and heat the oxidation filter (3) with exhaust heat. This oxidation filter (8) also oxidizes and removes toxic gases such as unburned gas contained in the combustion exhaust gas.This oxidation filter (8) has heat resistance, corrosion resistance, and a certain level of air permeability. A carrier with a catalyst supported by any means is suitable. For example, cordierite, which has heat resistance and corrosion resistance, is suitable.
, 2 Al1203) with platinum (ILz Pa
It is preferable that the pressure member is formed by supporting the pressure member by an impregnation method or the like, and that the pressure member is a plate-like member having a constant thickness, and that the shape of the vent hole is honeycomb-like or foam-like. Further, if the oxidation filter (3) is provided with a deodorizing property by adding peskite or the like, it will also have a deodorizing effect and be useful in practice.

In addition, (7) is an exhaust pipe provided in communication with the straight-tubular combustion chamber (1), and (3) is a gas nozzle, which connects the base end mixing group (6), the air intake port (9), and the surrounding area. I am making it happen.

In the embodiment of the oxidation filter (8) shown in FIG. Multiple radiant burners are installed at equal intervals on the surrounding wall,
By using these radiant burners, the oxidation filter (3) can be quickly and reliably heated to the optimum temperature for its activation, and the oxidation filter (3) can be quickly activated and the oxidation filter (3) can be contained in the combustion exhaust gas. This enables more efficient oxidation treatment of toxic gases such as unburned gas.

The propagation combustion device continuously performs a cycle of wake and exhaust, ignition 1 combustion 1 extinguishment (returning every cycle, the flame front burns! (1). Because each part heats water evenly, the heat dissipates evenly from each part, so there is no uneven heating, and the thermal efficiency is also good. fryer for (
It is extremely useful when used as a TJ0 heat source for various gas combustion equipment such as Therefore, the combustion mechanism is that a certain type of fuel gas from the gas nozzle (8) and a certain amount of primary air from the primary air intake port (9) are supplied to the mixing chamber (6) and mixed. The mixture flows from the mixing chamber (6) through the narrowed part (5) to the straight combustion chamber (1).
), and flows inside the combustion chamber (1) from the upstream side to the downstream side (see dotted arrow (b) in the figure). The ignition source (2) located at the part (A) ignites the ignition rod.

When the tip of the mixture is ignited, the mixture starts to burn from the tip and the flame flows from the downstream side to the upstream side in the combustion chamber (1) (solid line arrow fa in the figure). PIM is performed to uniformly heat each S in the combustion chamber (1). When the final part of the flame flow reaches near the constricted part (5) of the proximal extinguishing site (E), the constricted part (5) blocks the flame flow and causes a sudden change in its flow velocity. The fire is extinguished reliably in order to give a
The flame propagation combustion operation is continuously carried out (
9 I will return it.

In the above-mentioned flame propagation combustion operation, experiments have shown that, for example, when the length of the straight-tubular combustion chamber (1) is 10'', the cycle of air supply and exhaust, ignition, combustion, and extinguishing is approximately It is done at a rate of 30 seconds to 60 seconds and the input is 1
In the case of 000 KcaVh, a heating temperature of approximately 100°C to 20°C was obtained equally from each part of the combustion chamber (1).

In a flame propagation combustion operation in which the cycles of air supply and exhaust, ignition, combustion, and extinguishing are repeated continuously, the combustion exhaust from the previous cycle is used during the air supply operation to supply the mixture in the next cycle to the combustion chamber (1). The gas is pushed out by the supplied air and released outside the device from the exhaust pipe (7), but in this invention, the ignition source (2) provided at the tip ignition part (4) of the combustion chamber (1) is Since the oxidation filter (3) was installed on the side,
As the combustion exhaust gas passes through the oxidation filter (8), the oxidation filter (3) is heated, and at the same time, toxic gases such as unburned gas and products contained in the combustion exhaust gas are butylated and exhausted. Since the exhaust gas is discharged from the exhaust pipe (7) to the outside of the vessel, exhaust gas containing toxic gases such as carbon monoxide will not be discharged outside the vessel. In addition, if the oxidation filter (8J) is heated with an afterburner (4) to the optimal humidity for activation, the oxidation filter (8) will be activated quickly, and the unburned gas etc. contained in the combustion exhaust gas will be removed. This is useful in practice because the oxidation treatment of toxic gases can be carried out more efficiently.The purpose of the afterburner (4) is to heat the oxidation filter (8) to the optimum temperature for its activation. In actual use, it also has a burnout oxidation function by combustion decomposition of toxic gases such as unburned gas contained in the combustion exhaust gas, and the afterburner (4) is placed at the ignition point ( The n installed near (4) can also be used as an ignition source.

〔Effect of the invention〕

As explained above, this invention has an n configuration, so
It has the following effects.

Combustion exhaust gas containing toxic gases such as residual unburnt gas peculiar to denme firing and products of incomplete combustion due to a drop in flame temperature is converted into a gas by an oxidation filter and released as clean exhaust gas. The danger of carbon poisoning is eliminated, and the safety factor for use is doubled.

Further, according to the invention as claimed in claim 2, the oxidation processing function of the oxidation filter is quickly and reliably maintained in an optimal state, so that the oxidation processing of toxic gases such as untwisted gas contained in combustion exhaust gas is performed. Be more efficient.

! 1 Taking advantage of these features, it is also ideal for road snow melting equipment, greenhouse cultivation, commercial fryers, etc.

[Brief explanation of the drawing]

FIG. 1 is an overall cross-sectional view showing an embodiment of a propagation combustion apparatus according to claim 1 of the present invention, FIG. 2 is an enlarged cross-sectional view of main parts,
FIG. 3 is a sectional view of essential parts showing an embodiment of a propagation combustion apparatus according to claim 2, and FIG. 1I is an overall sectional view of a conventional example. (1)... Straight tubular combustion chamber, prisoner... misfire area, (
2)...Ignition m, (3)...Division filter, (4)
...afterbana.

Claims (1)

[Scope of Claims] [1] In a combustion type propagation combustion device in which a cycle of supplying air, exhausting air, ignition, combustion, and extinguishing is continuously repeated in a straight pipe combustion chamber (1), and the flame front propagates, An oxidation filter (3) is provided on the downstream side of the ignition source (2) provided at the tip ignition site (A) of the straight tube-shaped combustion chamber (1), and removes unburned gas and other substances contained in the combustion exhaust gas. A propagation combustion device characterized by oxidizing and removing poisonous gases. [2] Place the oxidation filter (3) near the oxidation filter (3).
2. A propagation combustion apparatus according to claim 1, further comprising an afterburner (4) for heating the fuel (4) to an extent necessary for activation thereof.