JP5206306B2 - Deodorizing device - Google Patents

Description

  The present invention relates to a deodorizing apparatus with high hermeticity that is durable even in a gas containing water vapor with strong odor and deodorizes by oxidative decomposition.

  A conventional deodorizing apparatus will be described with reference to FIGS.

FIG. 5 shows an example of a conventional deodorizing apparatus (conventional example 1). As shown in FIG. 5, the deodorizing apparatus includes a catalyst fin 2 made of stainless steel having excellent corrosion resistance and having a catalyst component 1 that is heated to oxidize and decompose the odor to deodorize the surface, and the catalyst fin 2 as a pipe. A spirally wound fin unit 3, a sheathed heater 7 that heats the fin unit 3 disposed inside the pipe, and a stainless steel cylinder that is cylindrical and has a sheathed heater 7 fixed to the bottom by caulking and sealed with a sealing material It is comprised from the main body 6 made from. The main body 6 is provided with an inflow pipe 4 made of stainless steel into which the generated gas flows and an outflow pipe 5 which is also made of stainless steel and discharges the deodorized gas from the main body 6. These pipes are brazed 14 to the main body 6. As a deodorizing device, it is kept sealed except for the openings of two pipes. The periphery of the main body 6 is covered with a heat insulating material 13. A suction device 8 that sucks odorous gas into the deodorization device is provided at the subsequent stage of the deodorization device, and can be said to communicate with the outflow pipe (see, for example, Patent Document 1).

  Here, the catalyst fin 2 is subjected to blackening treatment so that the catalyst component 1 is stably fixed so that it does not peel off even when used for a long time in a gas containing water vapor. It is necessary to heat in a furnace (about 1000 ° C.). Further, the catalyst component 1 is applied and baked again in a high temperature furnace (about 600 ° C.).

  In addition, the inflow pipe 4, the outflow pipe 5, and the bottom surface of the main body 6 are attached to the main body 6 with a brazing material applied or attached to the joint before caulking the sheathed heater 7, and put in a furnace at about 1000 ° C. , Brazing 14 in the furnace.

  The operation of the deodorizing apparatus according to the conventional example 1 as described above will be described. The suction apparatus 8 operates, and the deodorized gas flowing into the main body 6 of the sealed deodorizing apparatus is heated by the sheathed heater 7 in a spiral shape. While passing through the fin unit 3 constituted by the catalyst fins 2, it is heated, oxidatively decomposed and deodorized. At this time, the temperature of the catalyst heater 2 is 400 ° C. to 600 ° C., and the temperature of the sheathed heater 7 is set so that the catalyst component 1 is always activated.

  The body 6 of the deodorizing device is also fixed to the sheathed heater 7 by caulking and sealed with a sealing material, and the parts other than the inlet 4 and the outlet 5 are hermetically sealed. Is possible.

  FIG. 6 shows an example using a ceramic heater (conventional example 2). Note that the same components as those in the above embodiment are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIG. 6, a ceramic heater 9 carrying the catalyst component 1 is used, and a bottom plate 11 in which the electrode portion 10 side of the ceramic heater 9 is fixed by caulking is fastened to the main body 6 with a screw through a packing 12. (For example, refer to Patent Document 2).

  Here, the ceramic heater 9 carrying the catalyst component 1 has a heat generating circuit sandwiched between ceramics as an insulator, and has an electrode portion 10 at the end, so that the electrode portion becomes conductive when oxidized. Heating in a high-temperature furnace is not possible due to problems.

  Therefore, after the catalyst component 1 is applied to the main body 6 that has been brazed 14 to the inflow pipe 4, the outflow pipe 5, and the bottom surface in advance by brazing 14 in the furnace, the catalyst component 1 is heated to a high temperature (about 600 ° C.) alone. The baked ceramic heater 9 is fastened with screws.

  The operation of the deodorizing apparatus of Conventional Example 2 will be described. The deodorized gas that has flowed into the main body 6 of the sealed deodorizing apparatus is oxidized and decomposed and deodorized by the catalyst component 1 of platinum and palladium heated to 400 ° C. to 600 ° C. by the ceramic heater 9.

Here, in order to deodorize a gas with strong odor, the ceramic heater 9 needs to be kept airtight, and the plate 10 to which the ceramic heater 9 is fixed is fixed to the main body 6 via the packing 12.
JP 2007-275835 A JP-A-7-78674

  Deodorizing by oxidative decomposition requires a large surface area of the surface on which the catalyst component 1 is supported, and also requires heating means for maintaining the catalyst support component 1 within the region at the activation temperature (400 ° C. to 600 ° C.). In addition, the sheathed heater 7 generally used as a heating means at 400 ° C. to 600 ° C. is inappropriate because it has a short surface area even when directly supported on the heater.

  Even if the surface area is secured, the sheathed heater 7 has a non-heated portion sealed with glass for insulation, and the heat resistance of the sealed portion is about 250 ° C., so that the catalyst component 1 is supported after the sheathed heater is completed. (A baking step of about 600 ° C. is required to support the catalyst component 1).

  Further, as a method of increasing the surface area, it is conceivable to cast aluminum having good thermal conductivity on the sheathed heater 7, but the melting temperature of aluminum is from around 400 ° C., and it cannot be heated to the activation temperature of the catalyst component 1. Therefore, it was inappropriate.

  Therefore, as in the above conventional example 1, a part for supporting the catalyst component 1 and a heating means are separately required, and the number of parts is high and the heating means and the catalyst component are indirectly heated. There was a loss of heat energy.

  In addition, a high-temperature furnace is used at least twice for supporting the catalyst component 1 and once for the production of the main body 6, and there is a construction method that uses a high-temperature furnace at least three times as a deodorizer unit, and the deodorizer is expensive. This is a major factor.

  Moreover, even if the case using the ceramic heater 9 which supported the catalyst component 1 can be considered like the prior art example 2, when the electrode part 10 of the ceramic heater 9 is heated in a high temperature furnace, it will oxidize and it will become poor conduction. For this reason, it is necessary to heat the ceramic heater 9 coated with the catalyst component 1 to carry the catalyst, and to fix the plate on which the ceramic heater 9 is fixed to the main body, so that the fixing portion has the number of parts. Further, although the ceramic portion of the ceramic heater 9 is hard, there is a risk of cracking when a force is applied, and it has been difficult to adopt a method of caulking the heater to the main body 6 as in Conventional Example 1.

  Therefore, in addition to using the more expensive ceramic heater 9, the number of parts is increased as compared with the configuration in which the sheathed heater 7 is employed, and actual adoption is difficult.

  Further, even if the catalyst component 1 is directly supported on the ceramic heater 9, there is no catalyst fin 2 that causes a pressure loss as in the conventional example 1. Therefore, if suction is performed with the suction device 8, the passing speed increases and sufficient deodorizing effect is obtained. Was not used, and was only used for relatively light deodorization.

  The present invention solves the above-mentioned problem, and is a type in which a catalyst is directly supported on a heating means, is durable even in a gas containing water with strong odor, and is deodorized by low cost oxidative decomposition with a simple construction method. It aims at providing a deodorizing apparatus with high airtightness.

In order to solve the above-described problems, the present invention directly supports a catalyst component for deodorizing the generated gas on the surface of the ceramic heater itself, and the ceramic heater is brazed in a vacuum furnace on a main body forming a sealed deodorizing apparatus. Fixed by attaching.

  Here, the ceramic heater has a heat generating circuit sandwiched between ceramics as an insulator, and can take a large surface area and can be set relatively freely as long as it has a surface configuration. In addition, various shapes can be selected, and the lifetime is excellent, and even long-term use at a high temperature near 1000 ° C. can be heated.

  In addition, supporting a catalyst component on the ceramic itself has many ceramic honeycomb catalysts and the like, and there is no problem as a material.

  Therefore, the parts supporting the catalyst and the heating means are made the same part and the number of parts is reduced, and since the catalyst component is supported on the heating means, the catalyst component can be directly heated and the thermal efficiency is good and the simple construction method is low in cost. A deodorizing device is provided.

  According to the present invention, the part carrying the catalyst and the heating means are the same part, and the number of parts is reduced, and since the catalyst component is carried on the heating means, the catalyst component can be directly overheated, the thermal efficiency is good, and the simple construction method Can be provided.

  In the first invention, a catalyst component for deodorizing the generated gas is directly supported on the surface of the ceramic heater itself, and the ceramic heater is fixed to a main body forming a sealed deodorizing apparatus by brazing in a vacuum furnace. . Here, the ceramic heater has a heat generating circuit sandwiched between ceramics as an insulator, and can take a large surface area and can be set relatively freely as long as it has a surface configuration. Various shapes can be selected, and since it can be heated to a high temperature close to 1000 ° C. for a long time, it can be used in any space and the deodorizing ability can be maintained at a high level.

  Furthermore, since brazing is performed by brazing in a vacuum furnace, it is possible to prevent the ceramic heater terminal from being oxidized, so the formation of the deodorizing device body (brazing of the inflow pipe and outflow pipe), fixing of the ceramic heater, catalyst components Can be carried out by brazing in a furnace in a high temperature furnace at the same time.

  In addition, supporting the catalyst component on the ceramic itself has many ceramic honeycomb catalysts and the like, and there is no problem as a material.

  Accordingly, the catalyst supporting part and the heating means are made the same part, the number of parts is reduced, and the catalyst component is supported on the heating means, so that the catalyst component can be directly overheated and the heat efficiency is high and the simple deodorizing apparatus is provided. I can do it.

  In the second invention, since the ceramic heater and the deodorizing device main body are brazed in a nitrogen gas neutralizing atmosphere, the electrode portion of the ceramic heater is not oxidized as in the first invention. The three steps of fixing the ceramic heater and supporting the catalyst component on the ceramic heater (baking) can be performed by brazing in the furnace in a high temperature furnace at the same time.

In the third invention, since a plurality of fins are formed on the surface of the ceramic heater, a case where a gas containing a large amount of water vapor is deodorized. Even when a deodorizing device is provided, a sufficient deodorizing effect can be obtained because the passage speed is slowed by pressure loss of the fins .

In the fourth invention, since the shape of the ceramic heater is cylindrical, the surface area can be increased by increasing the diameter of the cylinder, and it can be configured in the same cylindrical shape as the conventional type, so that the deodorizing device can be replaced. .

In the fifth invention, since the catalyst components are platinum and palladium, high oxidative decomposition ability can be maintained over a long period by maintaining the activation temperature.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
1 and 2 are side sectional views of the deodorizing apparatus according to the first embodiment of the present invention.

  As shown in FIGS. 1 and 2, the deodorizing apparatus includes a planar ceramic heater 9 carrying a catalyst component 1 made of platinum, palladium, or the like, an inflow pipe 4 and an outflow pipe 5, and an electrode portion of the ceramic heater 9. It consists of a main body 6 equipped with a bottom plate 11 fixed on the 10 side, and the periphery of the main body 6 is covered with a heat insulating material 13.

  A plurality of catalyst fins 2 made of metal or ceramic and having a plurality of holes are attached to the surface of the ceramic heater 9.

  Further, the loading of the catalyst component 1 on the ceramic heater 9, the brazing 14 with the bottom plate 11 of the ceramic heater 9, and the brazing 14 with the main body 6, the inflow pipe 4 and the outflow pipe 5 are performed in a nitrogen gas neutralizing atmosphere. It is heated at the same time in the furnace.

  The operation of the deodorizing apparatus having the above configuration will be described. Deodorized gas flows into the main body 6 from the inlet 4 and is oxidized and decomposed by the catalyst component 1 of platinum and palladium heated to 400 ° C. to 600 ° C. by the ceramic heater 9 and deodorized. Is done. After deodorization, it flows out from the outlet 5.

  Here, a plurality of catalyst fins 2 are attached to the surface of the ceramic heater 9, and in the case of deodorizing a gas containing a large amount of water vapor, a suction device is provided for exhausting the steam, and its path Even when a deodorizing device is provided inside, the passage speed does not increase due to pressure loss of the fins, and a sufficient deodorizing effect can be obtained.

  The ceramic heater 9 has a heat generating circuit sandwiched between ceramics as an insulator, and can take a large surface area and can be set relatively freely as long as it has a surface configuration. A variety of shapes can be selected, and it can be heated to a high temperature close to 1000 ° C for a long time. it can.

  In addition, supporting the catalyst component 1 on the ceramic itself has a large number of ceramic honeycomb catalysts and the like, and has a proven track record as a material, and the supporting is stable.

  Further, since it is formed in a flat surface, it is possible to provide a thin and efficient deodorizing apparatus that can take a large surface area.

Further, in this configuration, the flow path can be divided into two to allow both sides of the ceramic heater 9 to pass, so that the oxidative decomposition can be performed efficiently by reducing the flow rate through which the deodorizing gas passes, and the catalyst component loading area is reduced. Even if it is smaller than when it is early, the deodorizing effect can be performed efficiently.

  Furthermore, the high-temperature furnace process can be performed simultaneously from the conventional three times or more, and it is easy to employ an expensive ceramic heater 9 that is extremely productive.

  In the embodiment, the brazing 14 is performed in a nitrogen gas neutralizing atmosphere. However, it is obvious that the brazing 14 in the vacuum furnace is possible once.

  Further, it goes without saying that the same effect as in the first embodiment can be obtained even if the caulked bottom plate 11 is brazed 14 to the main body 6 without brazing the ceramic heater 9 directly to the main body 6 as shown in FIG.

  Furthermore, it goes without saying that when the catalyst component 1 is supported on the surfaces of the plurality of catalyst fins 2, the deodorizing ability is further improved.

(Embodiment 2)
FIG. 4 is a side sectional view of the deodorizing apparatus according to the second embodiment of the present invention.

    Note that the same components as those in the above embodiment are denoted by the same reference numerals and description thereof is omitted.

  In FIG. 4, the deodorizing apparatus 1 includes a cylindrical ceramic heater 15 having a diameter of about 30 mm carrying a catalyst component 1 made of platinum and palladium, and a main body 6 having an inlet 4 a and an outlet 5. Is covered with a heat insulating material 13.

  Further, the inflow port 4 a is opened both inside and outside the cylindrical ceramic heater 15.

  The operation of the deodorizing apparatus having the above configuration will be described. The deodorized gas is oxidatively decomposed and deodorized by the catalyst component 1 of platinum and palladium heated to 400 ° C. to 600 ° C. by the cylindrical ceramic heater 15 having a cylindrical shape of about 30 mm in diameter. Is done.

  Further, in this configuration, the flow path can be divided into two to allow the inner and outer surfaces of the cylindrical cylindrical ceramic heater 15 to pass therethrough, so that the oxidative decomposition can be performed efficiently by reducing the flow rate through which the deodorizing gas passes. Even if the component-carrying area is smaller than when the flow rate is high, the deodorizing effect can be performed efficiently.

  Needless to say, the same effect can be obtained by brazing 14 the ceramic heater directly to the main body 6 in Example 2.

  As described above, the deodorizing apparatus according to the present invention can reduce the number of parts by using the same part as the part supporting the catalyst and the heating unit, and can directly overheat the catalyst component because the catalyst unit is supported on the heating unit. It is possible to provide a deodorizing apparatus having a simple configuration with high thermal efficiency.

Side sectional drawing of the deodorizing apparatus of the 1st Embodiment of this invention Partial sectional view of the deodorizing apparatus of the same embodiment Side sectional view of another deodorizing apparatus of the first embodiment of the present invention Side sectional view of the deodorizing apparatus of the second embodiment of the present invention Side sectional view of the deodorizing apparatus of Conventional Example 1 Side sectional view of the deodorizing apparatus of Conventional Example 2

1 catalyst component 2 catalyst fin (fin)
6 Body 9 Ceramic heater 15 Tubular ceramic heater

Claims (5)

A deodorizing apparatus in which a catalyst component for deodorizing generated gas is directly supported on the surface of a ceramic heater itself, and the ceramic heater is fixed to a main body forming a sealed deodorizing apparatus by brazing in a vacuum furnace. The deodorizing apparatus according to claim 1, wherein the ceramic heater and the deodorizing apparatus main body are brazed in a nitrogen gas neutralizing atmosphere. The deodorizing apparatus according to claim 1, wherein a plurality of fins are formed on a surface of the ceramic heater. The deodorizing apparatus according to any one of claims 1 to 3 , wherein the ceramic heater has a cylindrical shape. The deodorizing apparatus according to any one of claims 1 to 4 , wherein the catalyst component is platinum and palladium.

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