JPS6124913A - Burner - Google Patents

Abstract

PURPOSE:To effectively utilize the thermal enegy by disposing a selectively permeable membrane that allows certain gas component in the fuel gas to be led to a second burner. CONSTITUTION:When only a main valve 9 is opened under the valve fully closed condition, fuel as G is led as far as a valve 8 for the main burner 1 in a first gas supply route 3. Part of the hydrogen gas in said fuel gas G passes through a selectively permeable membrane 5 to be introduced into a second gas supply route 4 further to a pilot burner 2, where pilot flame is secured by igniting the hydrogen gas. Because the hydrogen gas component in the fuel gas G which has been staying in the first gas supply route 3 is consumed by the pilot burner 2 while the main burner 1 is stopped, gas containing much methane gas proportion is supplied to the main burner 1 for some time after the main burner valve 8 is opened, and so, the calorific value increases temporarily, resulting in an effective heating.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is a combustion device that can be used in various fields such as a heat source for a boiler or an absorption refrigerator, a combustor for a gas turbine engine, or a domestic hot water heater. It is related to.

[Prior Art] For example, a gas burner-type combustion device used as a heat source of various types includes a main burner and a pilot burner, and gas is supplied to the pilot burner even when the main burner is inactive. I continue to do this to ensure that there is always a fire source. However, the conventional
The same combustion gas is supplied to the main burner and the pyro-nodular burner. Therefore, combustion in the main burner, which requires a high amount of heat, and combustion in the pilot burner, which does not require much heat, are performed under the same conditions. Therefore, thermal energy is wasted when only the pilot burner is ignited, resulting in unfavorable results from the viewpoint of energy saving.

[Problems to be Solved by the Invention] As can be understood from the following example, combustion devices equipped with several types of burners for different purposes are used in various fields, but the conventional ones In either case, the supplied combustion gas is directly used in each burner. Therefore,
In each burner, the heat amount is not precisely set according to the purpose, and thermal energy is often wasted.

The present invention aims to solve such problems simply and reliably.

[Means for Solving the Problems] In order to achieve the above objects, the present invention includes a pair of first and second burners, and a combustion gas containing a plurality of types of gases having different calorific values. a first gas supply line that guides the gas to the first burner; and a second gas supply line that is branched from the first gas supply line and communicates with the second burner. In the combustion apparatus, a specific gas component in the combustion gas is selectively permeated from the first gas supply system side to the second gas supply system side and guided to the second burner. It is characterized by having a permeable membrane.

[Operation] According to such a means, only a specific gas component in the combustion gas passes through the selectively permeable membrane and is guided to the second eight, so that the type and characteristics of the selectively permeable membrane are By appropriately selecting the following, it is possible to make the calorific combustion conditions of the first burner and the second burner different from each other depending on the purpose of use of the burner.

[Example] Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

The combustion apparatus of this embodiment uses city gas as the combustion gas G. City gas in recent years uses natural gas, whose main components are hydrogen gas (H7) and methane gas (C
H,). This combustion apparatus includes a pair of main burners 1 and 2, a first gas supply line 3 that guides the combustion gas G to the main burner 1, and a first gas supply line 3 that guides the combustion gas G to the main burner 1. A second gas supply line 4 is provided branching off from 3 and communicates with the pilot burner 2, and a second gas supply line 4 is provided to selectively supply part of the hydrogen gas in the combustion gas G. and a selectively permeable membrane 5 that allows the gas to pass through and guide it to the pilot burner 2 side.

The main burner 1 is a normal burner placed opposite to an object to be heated (not shown), and has a large number of waste nozzles 1a. On the other hand, the pilot burner 2 is connected to the main burner 1.
It is a small single-mouthed burner installed next to the river, and is the so-called Tane-Okawa one. The first gas supply line 3 is mainly composed of a gas pipe line 6 whose distal end is connected to the main burner 1 and whose proximal end is connected to a gas source (not shown). An air introduction lower, a main nozzle valve 8 and a main valve 9 are successively installed. A large-diameter portion 11 is provided in a portion of the waste pipe 6 located between the two valves 8.9, and the second gas supply line 4 is branched from the outer periphery of the large-diameter portion 11. The second gas supply line 4 is comprised of a thin pipe line 12 having a much smaller diameter than the gas pipe line 6. The selectively permeable membrane 5 formed into a cylindrical shape is fixed to the large diameter portion 11 so that the large diameter portion 11 has a double tube structure. The selectively permeable membrane 5 is a thin membrane having a molecular sieving function that allows hydrogen molecules to pass through easily but prevents methane molecules, which have a much larger molecular structure than hydrogen molecules, from passing through.
The first gas supply line 3 and the twenty-sixth gas supply line 4 are disposed by.

With such a configuration, when only the main valve 9 is opened from a fully closed valve state, the combustion gas G pumped from a gas source (not shown) is transferred to the main burner valve 8 in the first gas supply line 3. It will be introduced just before. and,
A portion of the hydrogen gas having a width G of the combustion gas passes through the selectively permeable membrane 5 and is guided to the second gas supply line 4, and then guided to the pilot burner 2 through this thread line 4. Therefore, by igniting the hydrogen gas discharged from the pilot burner 2, a kindling can be secured. In this case, since hydrogen gas has a lower ignition point than the combustion gas G that also includes methane gas, it can be ignited more easily than conventional gases. In this state, when the main burner valve 8 is opened at an appropriate time, the combustion gas G passes through the valve 8 and is guided to the main eight 1. Therefore, this main eight-liter is ignited by the ignition from the pilot burner 2, and normal combustion is started. Note that while the main burner 1 is being weighed, the hydrogen gas component in the combustion gas G waiting in the first gas supply line 3 is consumed by the pilot burner 2. Gas containing a large proportion of methane gas will be supplied to the main eight 1 for a while after the valve 8 is opened.

Heat generation temporarily increases. Therefore, efficient heating is possible. Furthermore, when the main burner valve 8 is closed from this state, combustion of the main burner 1 is stopped, but the combustion gas G in the first gas supply line 3 is
Since the hydrogen gas component contained in the hydrogen gas component passes through the selective permeation H5 and continues to be supplied to the pilot burner 2, a fire source is always secured. That is, the pilot burner 2 maintains the ignition state until the main valve 9 is closed.

In this way, each burner 1 and 2 can be operated, but if the pilot burner 2 is made to burn hydrogen gas separated from the combustion gas instead of the combustion gas as described above, the The amount of heat consumed by the pilot burner 2 can be reduced, making it possible to save energy. In other words, the calorific value per unit volume of methane gas is much larger than that of hydrogen gas, so in the case of the combustion gas, the calorific value is about 10,000 to 13,000 kcal/Nm, whereas in the case of hydrogen gas, is about 25
00kcl/Nm. Therefore, the amount of heat generated in the pilot burner 2 is reduced, and wasteful energy consumption can be suppressed.

It should be noted that the pair of burners is of course not limited to the main burner and the single piezo burner, and various modifications can be made without departing from the spirit of the present invention. For example, it can be similarly applied to variable heat amount/hener, etc.

Furthermore, the combustion scum is not limited to natural scum containing hydrogen scum and methane gas.

Furthermore, the manner in which the selectively permeable membrane is mounted is not limited to that of the above-mentioned embodiments. For example, it may be something else.

[Effects of the Invention] Since the present invention has the above configuration, even though combustion gas supplied from a common gas source is used, the calorific combustion conditions of each burner having a different purpose can be changed. can be set to be different from each other, and it is possible to provide a combustion device that can effectively utilize thermal energy.

[Brief explanation of the drawing]

The drawing is a schematic sectional view showing an embodiment of the present invention. ■...First burner (main burner) 2...Second burner (pilot burner) 3...First gas supply line 4...Second gas supply line 5...・Selective permeation membrane G・ll11 combustion gas

Claims (2)

[Claims] (1) A pair of first and second burners, a first gas supply line that guides combustion gas containing multiple types of gases with different calorific values to the first burner, and a second gas supply line that is branched from the gas supply line and communicates with the second burner; A combustion device characterized by comprising a selectively permeable membrane that selectively permeates gas to the side of the gas supply system and guides the gas to the second burner. (2) The combustion apparatus according to claim 1, wherein the combustion gas is natural gas containing hydrogen gas and methane gas, and the second burner is a pilot burner that burns the hydrogen gas. .