JPH08164325A - Catalytic converter - Google Patents

Abstract

PURPOSE: To provide thermal insulation and saving in power of a catalytic converter and to prevent deformation and damage of a catalytic cylinder due to thermal expansion. CONSTITUTION: A catalytic cylinder 16 with built-in catalytic body 15 and heater 19 is housed in an insulating case 20 through spacers 41, 42, 43 and an insulating material 99. not fixed thereto, thereby thermal expansion of the catalytic cylinder 16 is allowed and also a heat insulation countermeasure is considered. A suction port 21 on one end side in the cylindrical center direction of the catalytic cylinder 16 and a discharge port 22 on the other end side in the cylindrical center direction thereof are arranged so that they may be inclined to the cylindrical center. Then exhaust gas is brought into contact with the whole surface of the catalytic body 15 to improve deodorizing efficiency.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a catalytic converter used in a kitchen waste processing apparatus for heating and drying food waste generated in kitchens such as homes and restaurants.

[0002]

2. Description of the Related Art As an example of this type of garbage processing device,
JP-A-1-189383, JP-A-4-29793
As disclosed in Japanese Patent Laid-Open Publication No. 2004-53242, there is a product in which raw garbage is heated and dried in a processing container to reduce the weight and weight, thereby facilitating the handling of storage and transportation. There, a catalytic deodorization method is adopted as a means for removing odors generated together with water vapor during the drying process of raw garbage.

[0003]

A catalytic converter is used as the above-mentioned catalytic deodorization method. This catalytic converter has a catalyst inside the catalyst cylinder and a heater for activating the catalyst. Must be heated to and maintained at a high temperature. However, when the catalyst cylinder is exposed to the outside, heat is dissipated from the surface of the catalyst cylinder, so that much power consumption is required to heat the catalyst. Further, if the catalyst cylinder is simply covered with a heat insulating case as a heat insulation measure, the catalyst cylinder thermally expands, and this thermal expansion easily causes deformation or damage.

Therefore, an object of the present invention is to achieve heat insulation and power saving of the catalytic converter. Further, the object of the present invention is to
This is to improve deodorization efficiency and prevent thermal deformation damage of the catalytic converter.

[0005]

According to the present invention, a catalyst cylinder 16 having a catalyst body 15 and a heater 19 therein, as shown in the drawing, is provided.
And a heat insulating case 20 in which the catalyst cylinder 16 is housed via spacers 42 and 43 so as to allow thermal expansion of the catalyst cylinder 16. The catalyst cylinder 16 has a catalyst body 15 at one side on one end side in the cylinder center direction thereof. The intake port 21 facing one end of the catalyst core 15 and the exhaust port 22 facing the other end of the catalyst body 15 on the other side on the other end side in the cylinder center direction are arranged so as to be oblique to the cylinder center. The intake port 21 and the exhaust port 22 are characterized in that they are respectively inserted into the intake lead-out port 37 and the exhaust lead-out port 39 provided in the heat insulating case 20 in a loosely fitting manner.

[0006]

Since the surface of the catalyst cylinder 16 is covered with the heat insulating case 20, the heat loss of the catalyst body 15 can be reduced,
The deodorizing function of the catalyst body 15 is activated.

Intake port 21 on one end side of the catalyst cylinder 16 in the cylinder center direction
And the exhaust port 22 on the other end side in the cylinder center direction are arranged so as to be oblique to each other with respect to the cylinder center. Exhaust gas can be brought into contact with the entire surface, enabling efficient deodorization.

Since the catalyst cylinder 16 receives the heat of the catalytic reaction and becomes higher in temperature than the heat insulating case 20, thermal expansion occurs largely, but the catalyst cylinder 16 does not adhere to the inside of the heat insulating case 20 and the spacers 42 and 43 are provided. While storing via
Since the thermal expansion of the catalyst cylinder 16 is allowed in the heat insulating case 20 by inserting the intake port 21 and the exhaust port 22 into the intake outlet port 37 and the exhaust outlet port 39 in a loose fitting manner, respectively. In particular, the deformation and damage of the intake port 21 and the exhaust port 22 can be prevented.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the catalytic converter according to the present invention is applied to a garbage processing device will be described. In FIG.
The kitchen waste disposal device has a processing container 1 into which raw garbage is put and an outer box 2
It is stored and placed inside. A lid 3 is attached above the outer box 2 so as to be freely opened and closed around a hinge 4. The processing container 1 is heated by a heating means (not shown) such as a sheath heater to the extent that raw garbage is not burnt. As the heating means, in addition to the sheath heater, for example, a magnetron for heating garbage by high frequency is used as the processing container 1.
In some cases, the one provided for the above, or the one that causes the processing container 1 to self-heat by the iron loss heat generation by the electromagnetic wave may be used.

In order to promote the drying and exhaust of the outside air by sending the outside air into the inside of the processing container 1, an outside air inlet 9 is provided in the bottom wall 3a of the lid 3 which closes the upper part of the processing container 1, while the outside of the processing container 1 is provided. The air pump 10 is arranged below, and this pump 10
The outside air inlet 9 and the outside air inlet 9 are connected by an air supply pipe 11. The lid 3 is provided with an external exhaust port 12 for exhausting vapor generated during heating and drying of raw garbage in the processing container 1, and the external exhaust port 12 is connected to the inside of the processing container 1 by an exhaust pipe 13. are doing. A catalytic converter 14 according to the present invention is provided in the middle of the exhaust pipe 13 for catalyzing the vapor discharged from the processing container 1 to oxidize and deodorize the vapor.

As shown in FIG. 1, the catalytic converter 14
Is a catalyst body 15 in which a precious metal such as platinum or palladium metal is supported on a honeycomb-shaped ceramic carrier such as alumina or cordierite is inserted into a catalyst cylinder 16 via a heat insulating sheet 17 such as a ceramic sheet. 15
A rod-shaped heater 19 is made to penetrate through the center of the box, and is housed inside a heat insulating case 20. The catalyst cylinder 16 is formed of a metal material having excellent heat resistance such as stainless steel into a cylindrical shape or a rectangular cylinder shape, and a short tubular intake port 2 is provided at one side on one end side in the cylinder center direction.
1 is fixed to the other side of the other end in the direction of the cylinder center by welding or the like in a manner orthogonal to the cylinder center so that the exhaust ports 22 each having the same short tube shape are arranged so as to be oblique to the cylinder center. ing.

A space 24 communicating with the intake port 21 is secured between the intake side lid 23 of the catalyst cylinder 16 and one end face of the catalyst body 15 facing the cover 23 over the inner circumference or part of the catalyst cylinder 16. Ribs 25 are provided on the other hand, while the lid 2 on the exhaust side is provided.
6 and the catalyst cylinder 16 so that a space 27 communicating with the exhaust port 22 can be secured between the catalyst body 6 and the other end surface of the catalyst body 15 facing the catalyst body 6.
Insert a C-shaped ring 28 on the inner circumference of the
Between the C-shaped ring 28 and the C-shaped ring 28, the movement of the catalyst body 15 in the catalyst cylinder 16 in the cylinder center direction is restricted. in this case,
The C-shaped ring 28 is formed by reducing the diameter of the metal spring material to form the catalyst cylinder 16.
Since it is pressed against the inner wall of the ring, the ring 28 slides and absorbs when a difference in thermal expansion occurs between the inner wall and the catalyst body 15. Further, the thermal expansion difference is mitigated by the deformation of the heat insulating sheet 17, because the heat insulating sheet 17 which is compressively deformable is interposed between the inner wall of the catalyst cylinder 16 and the outer surface of the catalyst body 15. Mechanical damage is prevented.

The heater 19 is inserted through the center of a lid 23 on the intake side of the catalyst cylinder 16, and a flange 29 fixed to the heater 19 side is fixed to the lid 23 with a screw 30. Heater 1
9 has a built-in thermocouple temperature sensor 31,
The catalyst temperature is maintained at around 500 ° C. to activate 5. Further, a thermal fuse 33 is interveningly connected in the middle of one lead wire 32 of the heater 19.

2 to 4, the heat insulating case 20 is shown.
Is an upper and lower case 20 made of thermosetting plastic having excellent heat resistance such as polyphenylene sulfide (PPS).
a and 20b, upper case 20a and lower case 2
0b is formed in a semi-cylindrical shape with flanges 34 and 35, respectively, and the flanges 34 and 35 are abutted against each other and integrally connected with a screw 36. The inner diameter of the heat insulating case 20 is set to be larger than the outer diameter of the catalyst tube 16, and the axial length inside the heat insulating case 20 is also set to be larger than the tube center direction length of the catalyst tube 16 to provide a large space between them. ing.

The catalyst cylinder 16 is housed through the spacers 41, 42, and 43 without being fixed to the inside of the heat insulating case 20, so that the space between the heat insulating case 20 having a large linear expansion coefficient and the catalyst cylinder 16 having a small linear expansion coefficient. The difference in thermal expansion between the two shall be allowed. The catalyst cylinder 16 has an intake port 21 and an exhaust port 22 with flanges 34 and 35 of the upper and lower cases 20a and 20b.
An intake outlet 37 having an inner diameter larger than the outer diameter of the intake port 21 formed between them and an exhaust outlet 39 having an inner diameter larger than the outer diameter of the exhaust port 22 are formed. Heater 1 formed between 35
Each of the heater outlet ports 40 having an inner diameter larger than the outer diameter of 9 is loosely inserted through a ring-shaped spacer 41 made of a heat-resistant hard material such as a mica plate. Each spacer 41 includes an intake port 21, an exhaust port 22 and a heater 19.
The respective outer peripheries are inserted in a loosely fitted state to allow their displacements due to thermal expansion. Since the intake port 21 and the exhaust port 22 are in the engagement relationship of being inserted into the intake port 37 and the exhaust port 39, the catalyst cylinder 16 is restricted from rotating in the circumferential direction in the heat insulating case 20. . The intake port 21 is connected to the inside of the processing container 1 by the exhaust pipe 13, and the exhaust port 22 faces the external exhaust port 12.

The catalyst cylinder 16 and the heat insulating case 20 are housed in the heat insulating case 20 with a C-shaped spacer 42 and an L-shaped spacer 43 made of the same material as the spacer 41 interposed therebetween. A predetermined heat insulating space 44 is formed between them. The C-shaped spacer 42 is fitted to the outer circumference of the catalyst cylinder 16 from one end in the cylinder center direction, and its outer peripheral edge is fitted and fixed to the grooves 46 of the ribs 45 provided on the inner circumferences of the upper case 20a and the lower case 20b, respectively. To be done. The interposition of the spacer 42 can restrict the movement of the catalyst cylinder 16 in the heat insulating case 20 in the radial direction having a circular cross section. The L-shaped spacers 43 are respectively interposed between the intake side and exhaust side lids 23 and 26 of the catalyst cylinder 16 and the inner wall of the heat insulating case 20 facing these. Insulation case 2
Groove 4 into which the outer edge of the spacer 43 fits
Ribs 48 having 7 are provided respectively. The L-shaped spacer 43 restricts the movement of the catalyst cylinder 16 in the heat insulating case 20 in the cylinder center direction thereof, and the spacer 4
The horizontal portion 43a of No. 3 is sandwiched between the catalyst cylinder 16 and the inner surface of the lower case 20b.
I try not to move towards. When the difference in thermal expansion between the heat insulating case 20 and the catalyst cylinder 16 appears remarkably, the spacers 41, 42, and 43 are made of phosphor bronze, iron, stainless steel, or another wire or plate material having heat resistance and elasticity shown in FIG. )
As shown in (B), the difference in thermal expansion can be absorbed and relaxed by forming it in a wave shape or a coil shape so as to be highly elastic.

A heat insulating material 49 such as glass fiber is interposed between the spacers 42 in the heat insulating space 44 between the heat insulating case 20 and the catalyst cylinder 16. As shown in Figure 1,
The thermal fuse 33 of the heater 19 is housed inside the heat insulating material 49. In this thermal fuse 33, the terminal leads 33a at both ends are covered with a heat insulating tube 53, and led out to the outside through a groove 54 formed in the mating surfaces of the flanges 34 and 35. Therefore, if the temperature fuse 33 is blown due to an accident, the upper case 20a can be opened for easy replacement and repair. The heat insulating case 20 is
As shown in FIG. 3, the flanges 34 and 35 are mounted on a boss 50 projecting from the bottom wall 3a of the lid 3 of the kitchen waste disposal apparatus and fixed by screws 51. Flange 3
The screw holes 511/512 and 513/514 of 4.35 are arranged so as to be displaced from the symmetrical position with respect to the axis L of the heat insulating case 20 in FIG. The force applied to the base portion 50a of the boss 50 is reduced. For thermal expansion in the direction of the axis L, the screw holes 511, 512, 513, 514 are formed to be larger than the regular screw hole size, such as an elongated hole or an elliptical hole.
The thermal expansion can be absorbed by allowing sliding movement between the screw 51 and the flanges 34 and 35. Of course,
Even if the screw holes 511, 512, 513, and 514 are round holes, the diameter thereof is increased so that the screw 51 and the flange 34.
If a washer is loosely interposed between the above and 5, the thermal expansion can be absorbed in any direction. The connector 38 attached to the ends of the lead wire 32 of the heater 19 and the lead wire 31a of the temperature sensor 31 is connected to a connector (not shown) on the garbage processing device side.

The catalytic converter 14 having the above-described structure takes in the steam generated when the raw dust is heated and dried in the processing container 1 through the intake port 21.
It is then discharged from the exhaust port 22 after being oxidized and deodorized by exerting a catalytic action. At this time, since the catalyst cylinder 16 is covered with the heat insulating case 20, it is possible to reduce the heat radiation loss from the surface of the catalyst cylinder 16 and improve the heating efficiency of the catalyst body 15 by the heater 19. Catalyst cylinder 16 and heat insulating case 2
A heat insulating space 44 is formed between 0 and the heat insulating material 49.
Since the interposition is provided, the effect of reducing the heat dissipation loss can be further enhanced. Further, since the intake port 21 on the one end side of the catalyst cylinder 16 in the cylinder center direction and the exhaust port 22 on the other end side thereof are provided so as to be in a positional relationship of obliquely intersecting with the cylinder center,
It is possible to allow the steam entering from the intake port 21 to pass through the entire surface of the catalytic body 15 in a contact manner and be discharged from the exhaust port 22. Further, the catalyst cylinder 16 is accommodated through the spacers 41, 42 and 43 without being fixed to the inside of the heat insulating case 20, so that the difference in thermal expansion between the heat insulating case 20 and the catalyst cylinder 16 is allowed. Even if the cylinder 16 receives the heat of the catalytic reaction and becomes higher in temperature than the heat insulating case 20 and a large thermal expansion occurs, the thermal expansion may cause deformation and damage to the intake port 21 and the exhaust port 22 of the catalyst cylinder 16. Disappears.

When attaching the catalytic converter 14 to the garbage treating apparatus, it is possible to fix the catalyst tube 16 directly to the garbage treating apparatus side and cover the surface of the catalyst tube 16 with a heat insulating cover, unlike the above embodiment. In such a case, the impact and vibration from the garbage processing device side are transmitted to the catalyst cylinder 16 to destroy the catalyst body 15, and the loss is likely to occur. However, in the case where the heat insulating case 20 is directly fixed to the kitchen waste treating apparatus side as in the above embodiment and the catalyst cylinder 16 is housed in the heat insulating case 20, heat and vibration from the kitchen garbage treating apparatus side are insulated. Even if received in case 20, this heat insulating case 20
41 ・ 42 ・
The catalyst body 1 is absorbed and relaxed by 43 and the heat insulating material 49.
It is advantageous because it is possible to prevent the destruction of 5 and the loss of weight. The catalytic converter 14 can be applied not only to the garbage processing device, but also to other cooking equipment such as a microwave oven or a jar, or equipment having various unpleasant odors, such as a toilet ventilation fan.

[0020]

As described above, according to the present invention,
Since the catalyst cylinder 16 is housed in the heat insulating case 20, the heat radiation loss from the surface of the catalyst cylinder 16 can be reduced, and the heat insulation and power saving of the catalytic converter 14 can be achieved accordingly. The intake port 21 on one end side of the catalyst cylinder 16 in the cylinder center direction and the exhaust port 22 on the other end side of the catalyst core 16 in the cylinder center direction are arranged so as to be oblique to each other with respect to the cylinder center, and are arranged over the entire surface of the catalyst body 15. Since the exhaust gas can be contacted, the deodorizing efficiency can be improved. The catalyst cylinder 16 does not stick to the inside of the heat insulating case 20, and the spacer 4
By accommodating via 1, 42, 43, the catalyst cylinder 1
Since the thermal expansion of No. 6 is allowed, the catalyst cylinder 16
It is possible to prevent the deformation and damage of the intake port 21 and the exhaust port 22 due to the thermal expansion, and to improve the durability.

[Brief description of drawings]

FIG. 1 is an internal plan view of a catalytic converter.

FIG. 2 is a side view of a catalytic converter.

FIG. 3 is a cross-sectional view of a catalytic converter.

FIG. 4 is a perspective view of a catalyst cylinder and a lower case of the catalytic converter.

FIG. 5 is a schematic cross-sectional view of a kitchen waste processing apparatus including a catalytic converter.

FIG. 6 is a sectional view showing another embodiment.

[Explanation of symbols]

 15 Catalyst Body 16 Catalyst Cylinder 19 Heater 20 Heat Insulation Case 21 Intake Port 22 Exhaust Port 37 Intake Outlet Port 39 Exhaust Outlet Port 41/42/43 Spacer

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI Technical display location F26B 21/00 K B09B 5/00 ZAB P

Claims (1)

[Claims] 1. A catalyst cylinder 16 comprising a catalyst body 15 and a heater 19, and a heat insulating case 20 accommodating the catalyst cylinder 16 via spacers 42 and 43 so as to allow thermal expansion of the catalyst cylinder 16. 16 is the catalyst body 1 on one side on one end side in the cylinder center direction thereof.
5, the intake port 21 facing one end of the catalyst 5 is arranged so that the exhaust port 22 facing the other end of the catalyst body 15 is obliquely crossed to the cylinder center on the other side of the other end side in the cylinder center direction. The catalytic converter is characterized in that the intake port 21 and the exhaust port 22 are inserted into the intake outlet port 37 and the exhaust outlet port 39 provided in the heat insulating case 20 through spacers 41 in a loose fit manner.