JPS5828916A - Oil stove attached with deodorizing device - Google Patents

Abstract

PURPOSE:To remove CO and HC generating at the time of ignition and to improve sharply the exhaust gas purifying capacity of the titled stove by a method wherein the deodorizing device having an oxidizing catalyst is removably attached to the upper part of a combustion cylinder according to combustion conditions. CONSTITUTION:The titled oil stove is constructed such that a wire W is inserted into a hole provided in the top plate of the body 1 of the oil stove, the plate is formed above a combustion cylinder 4 and one end of the wire is displaceably fixed to the body 1 while the other end thereof suspends a deodorizing device 5 between the top plate and the combustion cylinder 4. The deodorizing device 5 comprises a hollow cylindrical vessel 6 made of stainless steel and a catalyst unit 7 consisting of a woven cloth of glass fibers and fixed to the vessel 6 by means of a fitting metal 8. When in use, the deodorizing device 5 is made to come close to the combustion cylinder 4 before and after the ignition and the extinguishment of fire so that HC and CO generating in the exhaust gas at the time of ignition and the extinguishment of fire are removed by the device 5.

Description

[Detailed description of the invention] The present invention relates to a kerosene stove with a deodorizing device.

In general, when fuel is combusted, there is a possibility that the combustion exhaust gas contains unburned fuel such as hydrocarbons and carbon monoxide, and the possibility of this is greater for liquid fuel and solid fuel than for gaseous fuel. However, in reality, kerosene stoves and the like contain relatively large amounts of hydrocarbons and carbon oxides when ignited and extinguished, causing foul odors and polluting the atmosphere.

As a method to remove hydrocarbons and carbon monoxide generated during ignition and extinguishing, a deodorizing device consisting of an oxidation catalyst and a container is installed in the flow path of combustion exhaust gas containing hydrocarbons and carbon monoxide, and this removes harmless carbon dioxide. There are methods to decompose it into carbon and water, and some of them have been put into practical use.

However, conventional kerosene stoves with a deodorizing device have a structure in which the deodorizing device is fixed at a fixed position at the top of the combustion tube, and the ability to remove hydrocarbons and carbon oxides (exhaust gas purification ability) during ignition and extinguishing is limited. However, both initial performance and durability were unsatisfactory.

As a result of various studies to improve the exhaust gas purification ability during ignition and extinguishing, the inventor of the present invention found that the deodorizing device is used only for a few minutes before and after ignition and extinguishing by placing it close to the position 2 to 10 (IB) on the combustion tube. However, during steady combustion, the deodorizing device can be moved to a position where the catalyst temperature is 600°C or less, preferably 600°C or less. was found to be significantly improved.

That is, the kerosene stove of the present invention is characterized in that the mounting position of the deodorizing device is movable depending on combustion conditions.

The present invention will be explained below with reference to Examples.

3 FIG. 1 is a perspective view of an embodiment of the kerosene stove according to the present invention, in which 1 is the kerosene stove body, 2 is a combustion adjustment dial, and 3 is a perspective view of an embodiment of the kerosene stove according to the present invention.
is the ignition button, 4 is the combustion tube, 5 is the deodorizing device, and when igniting,
When extinguishing a fire, it is operated to the position indicated by the solid line P, and during steady combustion, it is moved back to the position indicated by the dotted line Po using a lifting method.

FIG. 2 is a perspective view of another embodiment, in which the deodorizing device 6 is placed in the first
The device is not moved up and down as in the illustrated embodiment, but is moved left and right, that is, from position P to Pl, using a sliding hole and a metal fitting provided in the top plate. The deodorizing device described above is constructed by, for example, as shown in FIG. 3, a catalyst unit 7 is fixed to a cylindrical container 6 using a metal fitting 8.

The catalyst unit 7 mainly consists of a ring-shaped frame and a silica cloth catalyst. Specific examples thereof will be described in the following examples.

Example 1 A hollow cylindrical container made of stainless steel (heat-resistant enamel treated) with an outer diameter of 156JElφ at the upper part, an outer diameter of 138JElφ at the lower part, and a height of 67cm (heat-resistant enamel treatment), and silica purity 96 JP-A-58-28
91G <2) The base material is a glass fiber woven fabric with a diameter of 1 or more, and the base material has alumina supported at 16W1% of the glass fiber as a carrier, and platinum is supported at o, swt% of the carrier, and the amplitude is 161111
1 piece of pitch 12 wavy shaped silica cloth catalyst
A deodorizing device was constructed with a catalyst unit having an outer diameter of 1548 φ and a height of 20 jlb, which was punched out to a diameter of 62 mm and caulked with a stainless steel frame to form an integral structure.

Next, make 6 holes in the top plate of the combustion tube of a commercially available reflective stove (National O8-24), pass a stainless steel wire with an outer diameter of 3 wires through these holes, and connect one end to the deodorizing device mentioned above. In order to adjust the position of the deodorizing device, especially the catalyst, within a range of 6 to 10 m from the top of the combustion cylinder, a hook was made on the top plate, and the length of the wire and the position of the hook were adjusted.・
・・・・・・・・・Oil stopper shown in Figure 1 Example 2 On the top plate of the upper part of the combustion tube of a commercially available reflective stove (National O8-24), place a vertical line in the center of the combustion tube parallel to the front of the stove. Make 6 slits in width and 25cm in length through the top.
This slit has a round pillow with an outer diameter of 6, -.

Connect the deodorizing device through the
The structure allows the position to be adjusted from side to side at the eccentric position, and in order to make it easier to adjust the position from side to side, the upper left part of the reflector plate (76 meters from the top plate) was cut off to accommodate the deodorizing device. A department was established.

・・・・・・・・・The kerosene stove shown in Figure 2.

Example 3 An oil stove (National O
5-24) was modified to provide a slit and a storage space for the deodorizing device, and when installing the same deodorizing device as in Example 1 to this modified stove, the deodorizing device and the top plate were connected with a wire with a stopper, and the deodorizing device was installed. is a kerosene stove with a deodorizing device that can be moved not only vertically but also horizontally.

Comparative Example In order to reproduce the conventional deodorizing device-type kerosene stove, the deodorizing device described in Example 1 was used in a kerosene stove (National O5-
The catalyst was fixed on the combustion tube of No. 24) at a position 8 cm above the combustion tube.

A combustion test was conducted to compare the exhaust gas purification abilities of an improved kerosene stove with a deodorizing device and a conventional kerosene stove with a deodorizing device. Conventional kerosene stoves with a deodorizing device are installed with the deodorizing device installed in a fixed position and burning, and the exhaust concentration of carbon monoxide and hydrocarbons is measured for 2 minutes after ignition and 6 minutes after extinguishing, and the deodorizing device is installed. The respective conversion rates were determined using the measured values of carbon monoxide and hydrocarbon concentrations without attachment as blank values.

In the kerosene stove of Example 1, the position of the deodorizing device was lowered so that the catalyst was located at the 6th position above the combustion cylinder just before ignition, and
After a few minutes, the catalyst was returned to its position so that it was 10 m above the combustion tube, and combustion continued. Immediately before the fire was extinguished, the deodorizing device was lowered again to the same position as when it was ignited, and the fire was extinguished.

゛In the same way for the kerosene stove of Example 2, just before ignition, the deodorizing device was installed on the combustion tube at a position where the catalyst was at 8mm, and 2 minutes after ignition, the deodorizing device was moved horizontally, and just before extinguishing, the deodorizing device was installed again. A combustion test was conducted using a combustion cycle in which the flame was extinguished by returning it to the same position as when it was ignited.

Example 30 A kerosene stove was ignited with the catalyst placed at a position 7 mm above the combustion tube and the deodorizing device positioned directly above the combustion tube, and then moved horizontally 2 minutes after ignition. Immediately before extinguishing the fire, a deodorizing device was installed again in the same position as when the fire was ignited, and a combustion test was conducted to extinguish the fire.

In each case, one cycle of ignition and extinguishing was performed for 8 hours, and the concentrations of carbon monoxide and hydrocarbons were measured for 2 minutes after ignition and 6 minutes after extinguishment, and the conversion rate was determined from comparison with a blank value. Figure 4 shows the measurement results of the conversion rates of carbon monoxide and hydrocarbons during digestion.

In the figure, M is a characteristic diagram of each kerosene stove of Example 1, B is that of Example 2, C is that of Example 3, and D is a comparative example.

The following table shows the catalyst temperature measurement results during steady combustion.

As is clear from the results shown in Table 4, -carbon oxide,
The ability to purify hydrocarbons has been greatly improved. The exhaust gas purification ability during ignition also showed the same trend. This remarkable effect is thought to be due to the fact that thermal deterioration of the catalyst can be prevented by moving the installation position of the deodorizing device, based on the results shown in the table. In other words, in conventional kerosene stoves equipped with a deodorizing device, the deodorizing device was fixed in the space above the combustion tube, so it was kept in a high-temperature atmosphere during steady combustion with almost no carbon oxides or hydrocarbons being emitted, resulting in thermal deterioration. It is estimated that the problem progressed rapidly, limiting the ability to purify exhaust gas during ignition and extinguishing.

In addition, in the examples of the present invention, a catalyst in which platinum was supported on a carrier made of alumina supported on glass fibers as described in Example 1 was used, but the present invention is not limited to this catalyst.
It is also possible to use a commercially available oxidation catalyst in the form of granules, nicum, etc. In addition, although a rudimentary method was used in the embodiment as a method for movable the deodorizing device, the present invention is not limited to this, and various specific methods are possible, such as interlocking with a combustion adjustment dial. It is. Further, the structure of the deodorizing device is not limited to the structure described in Example 1, as long as it consists of an oxidation catalyst and a container having opportunities for supporting the oxidation catalyst and collecting exhaust gas.

As described above, in the present invention, the position of the deodorizing device is movable depending on the combustion situation, thereby providing a high-performance kerosene stove that is excellent in purifying hydrocarbons and carbon oxides. power to do; something that can be done.

[Brief explanation of the drawing]

Figures 1 and 2 are perspective views of each embodiment of the kerosene stove with a deodorizing device according to the present invention, and Figures 3 (a) and 3 (b) are a plan view and a front view of an example of the deodorizing device used in the kerosene stove. Figure 4 is a characteristic diagram of the hydrocarbon conversion rate and carbon monoxide conversion rate of various oil stoves. 1... Oil stove body, 4... Combustion tube, 6... Deodorizing device, 6... Container, 7
...Catalyst unit. -1 figure 3 z 251st! Jz 3 country

Claims (1)

[Claims] This kerosene stove with a deodorizing device is characterized in that the deodorizing device consisting of an oxidation catalyst and its container is mounted on the upper part of the combustion tube of the kerosene stove body so that its position can be moved freely according to combustion conditions.