JPH10220716A - Automatic non-powered slow combustion apparatus for combustible gas - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic non-powered slow combustion apparatus for a combustible gas which enables safe, accurate and handy continuation of slow combustion of the combustible gas and moreover, achieve a higher actual effect for the saving of energy effectively utilizing combustion heat by automatically supplying a necessary amount of oxygen for combustion in replenishment without using power. SOLUTION: This slow combustion apparatus for a combustible gas supplies oxygen suitable for the slow combustion of the combustible gas to perform a slow combustion continuously. The slow combustion device 1 for slowly burning the combustible gas is constituted of a combustion catalyst layer 1a having numerous ventilation voids 1b. This slow combustion device 1 has a function of automatically take in a necessary amount of air from the perimeter as the combustible gas is passed through the internal ventilation voids 1b to be burned.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-powered automatic slow-burn device for combustible gas. For details, send flammable gas that requires combustion treatment for the purpose of avoiding danger or environmental preservation, such as the danger of explosion or harm to the environment or living organisms, without using the air required for combustion without power. The present invention relates to an environment-friendly resource-saving and energy-saving device capable of automatically slowing down the combustion and automatically utilizing the generated combustion heat.

[0002]

2. Description of the Related Art Combustible exhaust gases are often emitted in various amounts and concentrations in many situations, such as in industry or at home, and these exhaust gases must be burned and detoxified to avoid danger. . Various combustion methods are used as specific means, but in any case, replenishment of an appropriate amount of oxygen or air is indispensable to maintain the combustion reaction. Here, the appropriate amount is not a theoretical value based on the scientific reaction formula, but is based on the following explosion theory that is indispensable to avoid the danger of explosion. It points to a value.

In general, in a combustion reaction, a mixing ratio of an oxide (fuel) and an oxidizing agent (oxygen or air) is an important factor, and depending on the mixing ratio, incomplete combustion or a sharp decrease in explosion is caused. Regarding the latter explosion, this gas mixture ratio has a lower explosion limit and an upper explosion limit,
When a mixed gas in the concentration region sandwiched between the upper and lower limits obtains an ignition source in a closed system, an explosion phenomenon is immediately caused. Although the explosion limit varies depending on the type of flammable gas, hydrogen gas has a particularly large explosion area, and therefore has a very high risk of explosion.

[0004]

The above-mentioned explosion conditions are not excluded in the widely used catalytic slow-burning system, and the air is diluted with air until the concentration of the flammable gas falls below the lower explosive limit. And sent to the catalyst tower. For example, in the case of hydrogen, since the lower explosion limit is about 4% in air, it is necessary to supply a large excess air of 30 times or more the amount of hydrogen in view of the safety factor. For this reason, the total amount of gas sent to the catalyst tower is increased to 30 times or more the original combustible gas to be treated. Further, in general, the required amount of the catalyst is specified by a volume ratio with respect to the total volume of the gas passing in one hour, so that the required amount of the catalyst increases in proportion to the increase in the dilution ratio with air, and the catalyst cost also increases. In the case of hydrogen, the required amount and cost of the catalyst have increased more than 30 times for the above reasons.

[0005] In order to supply the air necessary for ensuring safety as described above, an air pump must be installed, and a power for this operation and a space for installing the pump are also required.
That is, it is necessary to secure a space for installing the air pump and a power cost for operation. Further, since the combustible gas to be treated forms a closed system including the catalyst tower by connecting the pipe to the gas generating unit, the air pump is switched to a closed system at any point before or after the pipe or the catalyst tower. Due to the direct connection, the operation of the air pump causes a pressure fluctuation inside or at a connection point of the closed system, thereby affecting the system functions including the closed system. Therefore, it is indispensable to consider these influences on the installation location and operating conditions of the air pump. On the other hand, it is necessary to adjust the air supply amount to secure an appropriate air amount, and it is not always easy to balance the two. Also, consideration must be given to noise reduction by pump operation.

[0006] Further, even during slow burning of the catalyst tower, since the heat of combustion accumulates in the catalyst tower, the outer wall of the catalyst tower is also at a considerably high temperature. Although it is possible in principle to use this combustion heat effectively through a heat exchange device, substantial reductions in catalyst efficiency due to a decrease in catalyst temperature due to heat exchange and a decrease in catalyst function due to condensation of water vapor, etc. The attendant side effects cannot be avoided. Therefore, in the past, this type of waste heat utilization has not been put to practical use, and forced exhaustion has simply been performed to avoid thermal effects on peripheral devices. From the viewpoint of energy saving, this kind of waste heat should be used effectively.

[0007] Therefore, the above-mentioned costs and necessity of various considerations are not preferable in practical use, and there is a demand for the development of a technique for solving these many problems and disadvantages.

[0008]

SUMMARY OF THE INVENTION The present invention drastically solves the above-mentioned problems and disadvantages, and automatically supplies a necessary amount of fuel without using power to reinforce oxygen required for combustion, thereby ensuring safety. -To provide a non-powered automatic flammable gas non-flammable device that can surely and easily continue flammable combustion of flammable gas, and that can effectively use combustion heat to increase the effectiveness of energy saving. As an issue.

[0009]

Means for Solving the Problems To solve the above-mentioned problems, a non-powered automatic flammable gas igniting device for a combustible gas according to the present invention is characterized by adopting the following constitution. A flammable gas flammable device that continuously burns flammable gas by supplying oxygen suitable for gradual combustion, and a flammable burner for gradually burning flammable gas has a large number of ventilation gaps. This combustor has a function of automatically taking in a necessary amount of air from the surroundings when a combustible gas is burned through an internal ventilation gap.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a non-powered automatic flammable gas flaring apparatus according to the present invention will be described below with reference to the drawings.

In FIG. 1 to FIG. 3, reference numeral A denotes an apparatus A for automatically igniting a combustible gas without power. This device A
The flammable gas includes a flammable combustor 1 for flammable gas, and an introduction pipe 2 for introducing the flammable gas into the flammable gas. The burner 1 has a small pellet combustion catalyst 1a in which 0.5% of a Pd catalyst is adhered to an alumina carrier, and has a layer structure in which a large number of ventilation gaps 1b exist between each other. The catalyst for burning small pellets into a heat-resistant porous container 3 having a flat shape as shown in FIG. 1, a curved top surface as shown in FIG. 2, a spherical shape as shown in FIG. 1a is accommodated. This flame burner 1
The introduction pipe 2 for introducing the flammable gas into the inside has a configuration in which a saucer 2a is provided at the upper end as shown in FIGS. 1 and 2, and the flammable burner 1 is placed on the saucer 2a, or as shown in FIG. By inserting the flammable gas introduction pipe 2 into the spherical flame burner 1 from below to near the center, the flammable gas guided by the introduction pipe 2 is raised in the ventilation gap 1b in the flame burner 1. Then, convection of air is caused by ignition combustion to take in outside air from the outside of the combustor 1 and automatically supply oxygen to the combustible gas.

The material of the combustion catalyst 1a forming the slow combustor 1 in the apparatus A is not limited to Pd, but may be Pd.
t and many other catalysts can be used. Further, the form of the layer of the combustion catalyst 1a is not limited to the configuration in which the small pellet carrier is placed in the container 3 as described above, and has a large number of ventilation gaps 1b using the asbestos cotton with the catalyst 1a attached thereto. It is possible to form a layer of the combustion catalyst 1a, and any other material can be used as long as it can form a layer of the combustion catalyst 1a having a large number of ventilation gaps 1b.

[0013] The slow-burn device A shown in the above embodiment is a slow burner 1 in which a large number of ventilation gaps 1b are distributed in the layer of the combustion catalyst 1a.
The flammable gas is fed into the inside by the introduction pipe 2 to ignite automatically or artificially. Then, the combustion reaction immediately proceeds on the surface of the combustion catalyst 1a to generate combustion heat, and the catalyst 1a
The temperature of a rises and the catalytic reaction is accelerated. The reaction product gas rises in temperature and expands due to the rise in temperature of the catalyst and the heat of combustion, thereby increasing the temperature of the reaction product, thereby promoting the entry of cool fresh air from the peripheral bottom of the burner 1. As a result, convection of air occurs, oxygen is automatically replenished and combustion is continued, and the catalyst temperature is air-cooled to prevent overheating. All of the above steps automatically proceed, the combustion catalyst 1a is maintained at a constant temperature, the slow combustion reaction is automatically controlled at a constant speed, and a steady state is maintained, and the flammable gas is safely, reliably and simply. Combustion processing proceeds.

Further, since a fixed amount of combustion heat always moves upward from the slow-burning device A according to the present invention, the heat-exchange device 4 should be installed at an appropriate distance above the slow-burning device A. Accordingly, the heat quantity of the rising airflow and the radiant heat from the layer of the combustion catalyst 1a can be effectively utilized. This heat energy is partly due to the catalytic reaction and is completely waste heat, and the heat exchange device 4 is outside the system isolated from the heat source of the slow-burn device A,
The catalytic reaction system maintains a steady state independently of the heat exchange system. Therefore, the influence of the heat exchange on the combustion reaction is practically negligible.

No artificial control is required for all steps except for the ignition, and complete combustion proceeds automatically. The ignition is also safe and spontaneous ignition depending on the material system, so that artificial ignition is unnecessary and the operation is extremely simple.

[0016]

Example 1 A Pd catalyst 0.5 was added to a porous container 3 shown in FIG.
% On the alumina carrier.
A small combustor 1 containing 20 g of small pellets having a length of 4 mm and a length of 4 mm is formed to form a burner 1 in which a large number of ventilation gaps 1b are distributed. The flame retarder A was constructed by placing it on the upper side. Then, when hydrogen gas was sent from the inlet pipe 2 at a flow rate of 200 ml / min, heat was immediately generated, and the slow-burning reaction continued steadily as it was. Investigation of the gradual combustion state with a smoke line showed that air flowed in from the surrounding bottom layer, and that combustion air containing water vapor rose above the gradual combustion device A. Analysis of the rising combustion gases revealed that the unreacted hydrogen content was very small, below the detection limit.

Further, when a metal bent tube heat exchanger 4 filled with 100 ml of tap water is placed at a position 5 cm above the slow-burn device A and left for 10 minutes, the water temperature rises by 7 ° C. Was done. During this time, no abnormality was observed in the combustion state.

[0018]

Embodiment 2 The same combustion medium 1a as in Embodiment 1 is accommodated in a perforated container 3 shown in FIG. 2 to form a gradual combustor 1 in which a large number of ventilation gaps 1b are distributed. The slow-burn device A was configured on a saucer 2a provided at the upper end of the anaerobic gas introduction pipe 2. As a result of the hydrogen gas being gradually burned by the slow burner A, it was confirmed that the air circulation was extremely easy, and the same operation as in Example 1 was sufficiently performed.

A combustion medium 1a similar to that of the first embodiment is accommodated in a perforated container 3 shown in FIG. 3 to form a slow burner 1 in which a large number of ventilation gaps 1b are distributed. The flammable gas introduction pipe 2 was fed in to form the slow-burn device A. As a result of the hydrogen gas being slowly burned by the slow burner A, it was confirmed that the air circulation was easier than in the second embodiment, and that the same operation as the first and second embodiments was sufficiently performed. . This embodiment has a feature that the installation direction of the flame burner 1 can be freely selected according to the situation.

When the hydrogen generated by water electrolysis is used as a medical inhaler and the by-produced hydrogen is treated by the slow-burning device A shown in the first to third embodiments, the same operation as in each of the above-mentioned embodiments is sufficiently performed. It has been found that the danger caused by the indoor discharge of hydrogen gas can be completely eliminated. In this case, the hydrogen electrolyzer takes a DC power of 3.0 V and 30 A from the battery and can function as a simple portable device.

Examples 1 to 50 ml of ethylene gas per minute
When the treatment was performed by the slow-burning device A of the third embodiment, the sufficient operation was performed in the same manner as in each of the embodiments, so that the residual ethylene gas was drastically reduced to the extent that some traces were left.

Example 1 was applied to the lid of a petroleum benzine container.
It was recognized that the same operation as in each of the examples was sufficiently performed in this case also when the flammable device A of Example 3 was attached and petroleum benzene gas was introduced into the flammable burner 1 and ignited.

The present invention is not limited to the specific examples described above,
It goes without saying that many changes and modifications can be made without departing from the spirit of the invention regarding the material, configuration, combination, etc. of the members.

[0024]

【The invention's effect】

(1) Combustible gas, particularly combustible gas secretly released as waste gas, can be safely processed without fear of explosion, and can greatly contribute to environmental conservation and safety management. (2) The structure and manufacturing are simple and inexpensive, the operation is extremely simple and stable, the portability and operability are excellent, and it is suitable for emergency use. Problems such as flow control, securing of installation space, and operating costs can be solved at once. (3) Particularly, application to hydrogen gas treatment has an extremely wide range as described below. In other words, in fields requiring oxygen, such as activated sludge aeration, fish culture aeration, and oxygen inhalation, a water electrolysis method that can easily generate pure oxygen is significantly more advantageous than conventional methods that require cylinders and incidental facilities,
The treatment of hydrogen produced as a by-product of this electrolysis is problematic. Here, the use of the non-powered automatic slow-burning device of the present invention is extremely effective, and it is possible to increase the effect on resource saving and energy saving.

[Brief description of the drawings]

FIG. 1 is a vertical sectional front view showing an embodiment of a non-powered automatic flammable gas flammable combustion apparatus according to the present invention, which uses a flat-type luminaire.

FIG. 2 is a vertical sectional front view showing an embodiment of the same device using a curved top burner.

FIG. 3 is a longitudinal sectional front view showing an embodiment using a spherical flame burner of the above device.

[Explanation of symbols]

 A non-powered automatic slow burner 1 slow burner 1a combustion catalyst 1b ventilation gap 2 flammable gas inlet pipe

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[Procedure amendment]

[Submission date] March 28, 1997

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0003

[Correction method] Change

[Correction contents]

In general, in a combustion reaction, a mixing ratio of an oxide (fuel) and an oxidizing agent (oxygen or air) is an important factor, and depending on the ratio, incomplete combustion or a violent explosion phenomenon is caused. Regarding the latter explosion, this gas mixture ratio has a lower explosion limit and an upper explosion limit,
When a mixed gas in the concentration region sandwiched between the upper and lower limits obtains an ignition source in a closed system, an explosion phenomenon is immediately caused. Although the explosion limit varies depending on the type of flammable gas, hydrogen gas has a particularly large explosion area, and therefore has a very high risk of explosion.

Claims (1)

[Claims] 1. A flammable gas flammable device for continuously flammable gas by supplying oxygen suitable for flammable gas, wherein a flammable combustor for flammable gas to gradually burn is provided. It is composed of a combustion catalyst layer having a large number of ventilation gaps, and this burner has a function of automatically taking in a necessary amount of air from the surroundings when combustible gas is burned into the inside ventilation gap. Automatic non-powered flammable gas burner.