JP2002075605A - Heater for catalyst processing section and gas processing apparatus using the same - Google Patents

Abstract

(57) [Problem] To provide a heater for heating a catalyst processing section so that a catalyst temperature becomes substantially uniform regardless of a portion, and a gas processing apparatus using the heater. SOLUTION: The sheathed heaters 35a and 35b for heating a catalyst processing section 36 include a heater pipe 51 and a heating wire 53. Heating is performed by the heating wire 53 so that the surface temperature of the heater pipe 51 becomes substantially uniform. Therefore, the heat catalysts 36a and 36b to be heated are almost uniformly heated, and the temperature becomes almost uniform regardless of the position. As a result, the difference in processing efficiency between the parts of the catalyst processing unit 36 is reduced, and the processing capacity is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heater, particularly a heater for heating a catalyst, and a gas processing apparatus using the same.

[0002]

2. Description of the Related Art There is a case where a gas is processed using a catalyst as a processing means of a gas to be processed in a gas processing apparatus.
At this time, in order to activate the catalyst, the temperature of the catalyst is often set to a high temperature, and a heater or the like is provided in the vicinity of the catalyst and heating is often performed by radiant heat.

[0003]

The treatment efficiency of a catalyst changes depending on its temperature. In general, hot catalysts have a higher processing efficiency than cold catalysts.

[0004] However, if the catalyst is not uniformly heated and temperature unevenness occurs, the treatment efficiency may be uneven depending on the position of the catalyst. For this reason, when the gas to be treated passes through a place where the treatment efficiency of the catalyst is poor, the gas treatment may be insufficient. The processing capacity of the gas processing apparatus is evaluated based on the throughput of all the gases to be processed that have passed through the gas processing means, that is, the catalyst processing unit. For this reason, if the catalyst has non-uniform temperature, it is evaluated that the processing capacity of the gas processing apparatus is poor as a result.

[0005] It is an object of the present invention to provide a heater for heating a catalyst processing section so that the catalyst temperature is substantially uniform regardless of the location;
It is to provide a gas processing device using the same.

[0006]

According to a first aspect of the present invention, there is provided a catalyst processing unit heater for heating a catalyst processing unit, which comprises a tubular member and a conductive wire. . The conductive wire is inside the tubular member and heats the surface of the tubular member so as to make the surface temperature substantially uniform.

The conductive wire generates heat when current is conducted. The heat of the conductive wire is supplied to the tubular member by heat conduction or heat radiation to generate heat. The catalyst processing section is heated by radiant heat from the cylindrical member of the catalyst processing section heater.

If the heat generated by the cylindrical member for heating the catalyst processing section is not uniform, the processing capacity is reduced due to uneven temperature of the catalyst. The catalyst processing section heater of the present invention heats the cylindrical member by the conductive wire inside the cylindrical member so that the surface temperature of the cylindrical member becomes substantially uniform. Since the surface temperature of the tubular member is substantially uniform, the catalyst to be heated is heated substantially uniformly, and the catalyst temperature is substantially equal regardless of the position. As a result, the difference in processing efficiency between the parts of the catalyst processing unit is reduced, and the processing capacity of the catalyst processing unit can be improved.

The catalyst processing unit heater according to claim 2 is
2. The catalyst processing unit heater according to claim 1, wherein an amount of heat generated from the conductive wire at an end of the catalyst processing unit heater is larger than an amount of heat generated from the conductive wire at a portion other than the end.

[0010] The surface temperature of the cylindrical member of the heater for the catalyst processing section is often relatively low at the end where the terminal is located, and relatively high at the portions other than the end. When the amount of heat generated by the conductive wire included in the unit length of the catalyst processing unit heater is constant regardless of the position of the tubular member, the amount of heat received by the tubular member from the conductive wire at the end of the tubular member is The amount of heat received by the tubular member in the portion other than the portion from the conductive wire is smaller. Therefore, the surface temperature at the end of the tubular member becomes relatively low.

In view of this, in this case, in order to eliminate the non-uniformity of the surface temperature, the amount of heat generated from the conductive wire at the end is made larger than the amount of heat generated from portions other than the end. Accordingly, the amount of heat applied to the tubular member from the conductive wire becomes substantially uniform regardless of the position of the tubular member, and the surface temperature of the tubular member of the catalyst processing unit heater becomes substantially uniform.

[0012] The catalyst processing unit heater according to claim 3 is
The catalyst processing unit heater according to claim 2, wherein the conductive wire has a spiral shape. Here, a heater in which the conductive wire inside the tubular member is helical is used as the catalyst processing unit heater. Therefore, it is possible to relatively easily change the heat generation amount of the conductive wire for each part.

[0013] The heater for the catalyst treatment section according to claim 4 is
4. The catalyst processing unit heater according to claim 3, wherein an interval between the spirals of the conductive wires at the ends is smaller than an interval between the spirals of the conductive wires at a portion other than the ends.

Here, in the catalyst processing section heater using a spiral conductive wire, the spiral interval of the conductive wire at the end is relatively narrow. As a result, the calorific value of the conductive wire included in the unit length of the catalyst processing unit heater is larger at the end portion than at the end portion of the conductive wire, and the amount of heat generated by the conductive wire included in the portion other than the end portion is larger. The surface temperature of the cylindrical member becomes substantially uniform.

[0015] The heater for the catalyst processing section according to claim 5 is
4. The catalyst processing unit heater according to claim 3, wherein the diameter of the spiral of the conductive wire at the end is larger than the diameter of the spiral of the conductive wire at a portion other than the end.

Here, in the catalyst processing section heater using a spiral conductive wire, the diameter of the spiral of the conductive wire at the end is relatively large. As a result, the calorific value of the conductive wire included in the unit length of the catalyst processing unit heater is larger at the end portion than at the end portion of the conductive wire, and the amount of heat generated by the conductive wire included in the portion other than the end portion is larger. The surface temperature of the cylindrical member becomes substantially uniform.

The heater for the catalyst processing section according to claim 6 is
A catalyst processing unit heater for heating the catalyst processing unit, comprising a U-shaped tubular member and a conductive wire. The conductive wire is located inside the U-shaped tubular member, and heats the U-shaped tubular member so that the surface temperature of a portion facing the catalyst processing section becomes substantially uniform.

The conductive wire generates heat when current is conducted. The heat of the conductive wire is supplied to the U-shaped cylindrical member by heat conduction or heat radiation to generate heat. The catalyst processing unit is heated by radiant heat from a U-shaped cylindrical member of the catalyst processing unit heater.

If the heat generated in the portion of the U-shaped cylindrical member that heats the catalyst processing section facing the catalyst processing section is not uniform, the processing capacity is reduced due to uneven temperature of the catalyst. The heater for the catalyst processing section of the present invention is heated by the conductive wire inside the U-shaped cylindrical member so that the surface temperature of the portion of the U-shaped cylindrical member facing the catalyst processing section becomes substantially uniform. I do. In order to make the surface temperature of the portion of the U-shaped tubular member facing the catalyst processing portion substantially uniform, the catalyst to be heated is heated substantially uniformly, and the catalyst temperature becomes substantially equal regardless of the position. . As a result, the difference in processing efficiency between the parts of the catalyst processing unit is reduced, and the processing capacity of the catalyst processing unit can be improved.

[0020] The catalyst processing section heater according to claim 7,
7. The catalyst processing unit heater according to claim 6, wherein the conductive wire has a spiral shape. Further, the spiral interval of the conductive wire near the end of the U-shaped tubular member and near the U-shaped bent portion is U
The interval between the spirals of the conductive wires in the portion other than the vicinity of the end portion of the U-shaped tubular member and further in the portion other than the vicinity of the U-shaped bent portion is smaller.

Here, a heater in which the conductive wire inside the cylindrical member is spiral is used as the heater for the catalyst processing section. For this reason, the calorific value of the conductive wire can be changed relatively easily for each part. Further, the interval between the spirals of the conductive wires is relatively narrow in the vicinity of the end of the U-shaped tubular member and in the vicinity of the U-shaped bent portion. For this reason, in the U-shaped tubular member, the calorific value due to the conductive wire included in the unit length at the portion facing the catalyst treatment section is further U-shaped except near the end of the U-shaped tubular member. The amount of heat generated from the conductive wire in the vicinity of the end of the U-shaped tubular member and in the vicinity of the U-shaped bent portion is larger than the amount of heat generated from the conductive wire in a portion other than the vicinity of the bent portion. As a result, the surface temperature of the portion of the U-shaped cylindrical member facing the catalyst treatment section becomes substantially uniform, the catalyst to be heated is heated substantially uniformly, and the catalyst temperature is substantially independent of the position. Become equal.

A gas processing apparatus according to claim 8 is a catalyst processing section for processing the first gas before the catalyst processing into a second gas, and a catalyst processing section for the catalyst processing section according to any one of claims 1 to 7. A heater.

This is a gas processing apparatus using the catalyst processing heater of the present invention. The catalyst processing unit heater heats the catalyst processing unit that processes the first gas that is the gas to be processed into the second gas. Since the surface temperature of the cylindrical member of the catalyst processing unit heater is substantially uniform, the temperature of the catalyst processing unit heated by the radiant heat of the catalyst processing unit heater is substantially uniform. When the temperature of the catalyst processing section becomes substantially uniform, the processing efficiency in the catalyst processing section is made uniform, and the first gas that passes through the catalyst processing section without being subjected to gas processing decreases. Thereby, the gas processing capacity of the gas processing device is improved.

A gas processing apparatus according to a ninth aspect is the gas processing apparatus according to the eighth aspect, further comprising a heat exchange device. The heat exchange device heats the first gas by performing heat exchange between the first gas and the second gas.

Since the catalyst processing section is heated by the catalyst processing section heater, the first gas is processed to become the second gas, and at the same time, heat is received from the catalyst processing section and the catalyst processing section heater. Is done. For this reason, the second gas has a higher temperature than the first gas. At this time, the catalyst processing unit is cooled by the heat of the first gas, so that the processing efficiency of the catalyst processing unit is reduced.

In view of this, here, the first gas is heated by transferring heat from the second gas to the first gas using a heat exchanger. The amount of heat absorbed by the first gas from the catalyst processing unit is related to the temperature difference between the catalyst processing unit and the first gas. For this reason, cooling of the catalyst processing unit can be suppressed by reducing the temperature difference between the first gas and the catalyst processing unit. The second
Since the gas is a gas after the gas treatment, it does not need to be at a high temperature. Therefore, heating the first gas using the heat of the second gas is an effective use of the heat.

[0027]

DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment] <Overall Configuration> A deodorizing apparatus 1 according to a first embodiment of the present invention.
0 is shown in FIG. The deodorizing device 10 is a device for removing an odor in a factory or the like which easily emits an unpleasant odor.

The deodorizing apparatus 10 deodorizes a gas to be treated containing an odorous component by an adsorption process, and desorbs the adsorbed component using a heated regeneration gas.
Further, it is an apparatus for decomposing the desorbed components. The deodorizing device 10 has two storage spaces 11a, 1
1b inside the casing 11
Adsorption processing unit 12 mainly disposed in the lower storage space 11b
And the reproduction processing unit 1 arranged close to the adsorption processing unit 12
3 and a disassembling section 14 arranged in the upper storage space 11 a of the casing 11.

The casing 11 is a rectangular frame-shaped member, and has the above-described upper and lower storage spaces 11a and 11b formed therein. Further, as shown in FIGS. 2 and 3, a base frame 17 having a column 17 a standing upward is provided below the lower storage space 11 b. The strut 17a is arranged at the back of the center of the base frame 17, and a cantilever shaft 18 protruding forward is attached to the upper end of the strut 17a.

<Structure of Suction Processing Unit> The suction processing unit 12
The odor component of the gas to be treated is adsorbed. The suction processing unit 12 includes a suction rotor 20 rotatably and detachably mounted on the cantilever shaft 18, a rotation driving unit 21 for driving the suction rotor 20 to rotate, and a gas to be processed in the axial direction of the suction rotor 20. And a blower 22 for generating a flow. The suction rotor 20 is a circular member in which a number of honeycomb holes 20a parallel to the rotation axis are formed. The inner wall surface of the honeycomb hole 20a mainly contains an adsorption component such as hydrophobic zeolite or activated carbon, and can adsorb and desorb an odor component of the gas to be treated.

On the outer peripheral surface of the suction rotor 20, a toothed belt 27 constituting the rotary drive unit 21 is wound and fixed with the tooth surface facing outward. On the front surface of the suction rotor 20,
As shown in FIGS. 2 and 3, a seal plate 29 is detachably mounted. A circular opening 29a is formed in a portion of the seal plate 29 facing the portion where the honeycomb holes 20a are formed. When the blower 22 is operated by the seal plate 29, the gas flow of the gas to be processed efficiently flows through the honeycomb holes 20a.

The rotation drive unit 21 includes a drive motor 25
And a toothed pulley 26 mounted on a rotating shaft of a motor 25.
, A toothed belt 27, and a toothed belt 28 that meshes with the toothed belt 27. The motor 25 includes a motor bracket 25 attached to the base frame 17.
a. The toothed belt 28 is wound around the toothed belt 27 and the toothed pulley 26 and transmits the rotation of the motor 25 to the suction rotor 20. The toothed belt 28 is
The tension is applied by the tension device 30. The tension device 30 is an arm member having a tension roller 30a at its tip, and is mounted on the base frame 17 in a swingable manner and urged in a tension applying direction (clockwise direction in FIG. 3).

The blower 22 has a blower fan 22a disposed in the upper storage space 11a of the casing 11. The blower fan 22a is driven by a motor 22b, generates a flow of the gas to be processed in the axial direction of the suction rotor 20 from the near side to the back side of the suction rotor 20 in FIG. The air is exhausted to the outside of the deodorizing device 10 from the exhaust port 22c provided. At this time, the odor component of the gas to be treated is changed to the honeycomb hole 20 of the adsorption rotor 20.
a is adsorbed on the inner wall surface. Therefore, the honeycomb holes 20
The amount of suction in a is larger on the near side in FIG. 1 than on the far side in FIG.

<Structure of Reproduction Processing Unit> The reproduction processing unit 13
The odor components adsorbed by the adsorption rotor 20 are transferred to the honeycomb holes 2.
This is for regenerating the adsorption rotor 20 by detaching it from the inner wall of Oa. The regeneration processing unit 13 is fixed to the casing 11 and is disposed adjacent to the suction rotor 20 and a pair of regeneration units 23a and 23b, and is fixed to the casing 11 and is disposed adjacent to the pair of regeneration units 23a and 23b. And a pair of cooling units 24a and 24b. Also, the reproduction processing unit 1
Reference numeral 3 has a regeneration gas passage 16 for flowing a high-temperature regeneration gas through the regeneration units 23a and 23b.

The regenerating units 23a and 23b are arranged on the upstream side in the rotation direction of the suction rotor 20 indicated by an arrow R in FIG. The regenerating units 23a and 23b are arranged close to and opposed to both surfaces of the suction rotor 20 with the suction rotor 20 interposed therebetween. The playback units 23a and 23b are on the playback unit 23b side (back side).
This is for heating the honeycomb holes 20a of the adsorption rotor 20 by flowing a regeneration gas heated to a high temperature from above to desorb odor components adsorbed therein. The front reproducing section 23a and the cooling section 24a are detachably fixed to the casing 11. The rear regeneration section 23b and the cooling section 24b are fixed to the upper part of the column 17a.

The cooling units 24a, 24b are provided with a regenerating unit 23a,
23b are arranged adjacent to each other on the downstream side in the rotation direction. The adjacent reproducing unit 23a and cooling unit 24a and the reproducing unit 23b and cooling unit 24b are integrally formed. Cooling unit 2
4a and 24b are for restoring the adsorption function by cooling the adsorption rotor 20 heated by the high-temperature regeneration gas for desorption in the regeneration units 23a and 23b using the regeneration gas before heating. . The regeneration gas flows from the cooling unit 24a toward the cooling unit 24b (back side). By this regeneration and cooling, the adsorption performance of the adsorption rotor 20 is reproduced.

The regeneration gas passage 16 is provided in the casing 11.
Is disposed in the upper storage space 11a, and a blowing unit 31 for taking in and sending outside air, an exhaust tube 32 for preheating the outside air sent from the blowing unit 31, and heating the outside air preheated by the exhaust tube 32. And a first heating unit 33 for converting the gas into a high-temperature regeneration gas.

The blower 31 is a blower fan composed of a sirocco fan, and is disposed between the cooling unit 24b and the exhaust pipe 32. The blower unit 31 is connected to the cooling unit 24b and the exhaust tube 32 via a pipe, and sends outside air serving as a regeneration gas from the cooling unit 24a through the adsorption rotor 20 and the cooling unit 24b to the exhaust tube 32.

The exhaust stack 32 exchanges heat between the regeneration gas before heating and the high-temperature exhaust gas to be exhausted, recovers the exhaust heat of the exhausted regeneration gas, reduces the temperature thereof, The temperature of the regeneration gas before heating is increased to increase the temperature of the first heating unit 33.
It is provided in order to increase the heating efficiency and save the energy required for heating. The exhaust pipe 32 has a triple structure composed of three thin stainless steel pipe members arranged concentrically.

The first heating section 33 converts the outside air slightly heated by the exhaust pipe 32 to a temperature (for example, 150 ° C. to 200 ° C.) necessary for desorbing odor components in the regenerating sections 23a and 23b.
° C) to produce a regeneration gas.
That is, the first heating unit 33 is provided to indirectly heat the adsorption rotor 20 to a temperature required for desorption of components. The first heating unit 33 has, for example, a plurality of sheathed heaters. In the first heating section 33, the blowing section 31
The gas for regeneration is reduced from 250 ° C to
Heating to about 300 ° C. is also possible. The inlet of the first heating unit 33 is connected to the exhaust pipe 32 by a pipe. The outlet of the first heating unit 33 is connected to the regeneration unit 23b by a pipe.
And the heated regeneration gas is supplied to the regeneration unit 2
3b and 23a. From the playback unit 23b to the playback unit 23
The components of the odor adsorbed in the honeycomb holes 20a of the adsorption rotor 20 are desorbed by the high-temperature regeneration gas to the gas a, and are sent to the decomposition processing section 14 together with the regeneration gas.

<Configuration of Decomposition Processing Unit> The decomposition processing unit 14
The odor component desorbed in the regeneration processing unit 13 is decomposed by a catalyst. The decomposition processing unit 14 includes a reproduction unit 23b,
The odor component contained in the regeneration gas that has passed through 23a is further heated, and the heated regeneration gas is catalytically treated to decompose the odor component.

As shown in FIG. 4, the decomposition processing unit 14
A second pair of linear sheathed heaters 35a and 35b;
It has a heating unit 35 and a catalyst processing unit 36 composed of a pair of heat catalysts 36a and 36b disposed downstream of the sheathed heaters 35a and 35b in the flow direction. Sheath heater 35
As shown in FIG. 5, a and 35b each have a hollow cylindrical heater pipe 51 and a heating wire 53 spirally wound inside the heater pipe 51. Sheath heater 35a, 3
The spiral interval of the heating wire 53 at the end EP of 5b is smaller than the spiral interval of the central portion CP of the sheathed heaters 35a and 35b. Therefore, the surface temperature of the heater pipe 51 becomes substantially uniform. The second heating unit 35 has a temperature (for example, 250 ° C. to 300 ° C.) required for the catalyst treatment in the catalyst treatment unit 36.
C) to heat the thermal catalysts 36a and 36b by radiant heat. As a result, the regeneration gas is also heated to the temperature by the second heating unit 35 and the heat catalysts 36a and 36b. Further, since the surface temperatures of the heater pipes 51 of the sheathed heaters 35a and 35b are substantially uniform, each thermal catalyst 3
The temperatures of 6a and 36b become almost uniform. Catalyst processing unit 36
The upstream heat catalyst 36a is a catalyst for pretreatment for facilitating the processing at the downstream heat catalyst 36b. For example, chromium, manganese, iron, cobalt, nickel,
The catalyst includes at least one selected from the group consisting of copper, vanadium, and oxides thereof. Thermal catalyst 36
b is a noble metal catalyst, for example, gold, silver, platinum,
The catalyst contains at least one selected from the group consisting of ruthenium, iridium, palladium, rhenium, and iridium.

By using such two kinds of thermal catalysts 36a and 36b, the regeneration gas containing odor components such as sulfur compounds, nitrogen compounds and aldehydes can be deodorized efficiently.

<Operation of Deodorizing Apparatus> Normally, the suction rotor 2
For example, in a state where 0 is stopped, the gas to be treated is taken into the honeycomb holes 20a of the adsorption rotor 20 by the blower 22, and the odor component is adsorbed. The gas to be treated, to which the odor component is adsorbed and deodorized, is discharged from the exhaust port 22c by the blower fan 22a.

As the suction proceeds by the suction rotor 20, the inner wall of the honeycomb hole 20a is covered with the odor component, and the suction performance deteriorates. Therefore, for example, the reproduction process is performed once a day.
At the time of the regeneration process, the suction rotor 20 is rotated,
1 is operated, and the regeneration gas is heated by the first heating unit 33 and the second heating unit 35. In the second heating section, the thermal catalyst is heated. When the blowing unit 31 is operated, the cooling unit 2
Outside air flows from 4a to the cooling unit 24b through the honeycomb holes 20a of the suction rotor 20, and the suction rotor 20 is cooled. Then, the air is sent to the exhaust pipe 32 through the blower 31. In the exhaust stack 32, as described above, heat exchange is performed with the regeneration gas that has been heated after the completion of the catalytic treatment, and for example, outside air at 40 ° C. is heated to about 110 ° C.

The outside air heated by the exhaust pipe 32 is sent to the first heating unit 33 and is heated to, for example, about 150 ° C. to 200 ° C. to become a regeneration gas. The obtained regenerating gas is sent to the regenerating section 23b, from which the honeycomb holes 20a
And flows toward the reproducing section 23a. As a result, the components adsorbed on the inner wall of the honeycomb hole 20a are vaporized and desorbed, contained in the regeneration gas, and sent to the decomposition processing unit 14. The regeneration gas containing the odor component sent to the decomposition processing section 14 is further subjected to, for example, 250
It is heated to about 300 ° C. to about 300 ° C., decomposed by the catalyst processing unit 36 and deodorized.

As a result, the components adsorbed on the adsorption rotor 20 can be decomposed and deodorized. The deodorized regeneration gas is recovered in the exhaust pipe 32, and is discharged to the outside, for example, in a state where the temperature is lowered from 280 ° C. to 240 ° C. Further, the adsorption rotor 20 heated by the regenerating sections 23b and 23a to remove odor components is replaced with the cooling sections 24a and 24b.
, The suction performance of the suction rotor 20 returns to the original state, and the suction rotor 20 is regenerated.

<Characteristics of the Heater of the Present Embodiment> (1) The sheathed heaters 35a and 35b used in the disassembly processing unit 14 of the deodorizing apparatus 10 of the present embodiment include a hollow cylindrical heater pipe 51 and a heater pipe 51. 51 and a heating wire 53 inside. The heating wire 53 has a spiral shape. The spiral spacing of the heating wires 53 is not equal, and the spiral spacing of the heating wires 53 at the ends EP of the sheathed heaters 35a and 35b is smaller than the spiral spacing at the central portion CP. For this reason, the amount of heat applied to the heating wire 53 by the heater pipe 51 per axis length of the heater pipe 51 becomes substantially uniform regardless of the position of the heater pipe 51.
For this reason, the surface temperature of the heater pipe 51 becomes substantially uniform.

(2) The decomposition processing section 14 of the deodorization apparatus 10 of the present embodiment decomposes odor components in the catalyst processing section 36 of the decomposition processing section 14. The thermal catalysts 36a, 36b are heated by sheath heaters 35a, 35b. Heater pipe 5
Since the surface temperature of the thermal catalysts 36a,
The temperature of 6b becomes almost uniform regardless of the position.

(3) The deodorizing device 10 of the present embodiment includes an exhaust pipe 32. In the exhaust stack 32, heat exchange is performed between the regeneration gas (first gas) flowing through the cooling unit 24b and the high-temperature regeneration gas (second gas) after the catalytic treatment. The first gas is heated by the calorific value of the second gas.

<Modification of the Present Embodiment> (A) The second heating unit 35 of the first embodiment uses the sheathed heaters 35a and 35b shown in FIG. Instead, the sheathed heaters 135a and 135b shown in FIG. 6 may be used. Each of the sheathed heaters 135 a and 135 b has a hollow cylindrical heater pipe 52 and a spiral heating wire 54 inside the heater pipe 52. Heating wire 54
With respect to the sheath heater 52, the diameter of the spiral at the end EP is large and the diameter of the spiral at the center CP is small.
Therefore, similarly to the first embodiment, the surface temperature of the heater pipe 52 becomes substantially uniform, and the thermal catalysts 36a and 36b can be uniformly heated.

(B) The sheathed heaters 35a and 35b used in the second heating section 35 of the first embodiment are linear. Instead, the sheathed heaters 235a, 235 shown in FIG.
The second heating unit 235 using 5b may be used.

The sheathed heaters 235a and 235b are U-shaped. For this reason, since the installation position of the current injection terminal can be integrated on one side, the electric wiring is simplified.
The spiral heating wire 53a inside the sheathed heaters 235a and 235b is arranged only in the straight portion of the heater.
The U-shaped bent portions of the sheathed heaters 235a and 235b are connected by a conductor 56 that has a small electric resistance and does not generate heat due to conduction. This makes it possible to keep the bent part stressed by the U-shaped bending at a relatively low temperature,
The life of the sheathed heaters 235a and 235b can be extended.

The helical heating wire 53a inside the sheathed heaters 235a and 235b has a relatively narrow helical space in the vicinity of the terminal and in the vicinity of the U-shaped bent portion, and is relatively wide in other portions. For this reason, similarly to the first embodiment, the heater pipe 55 close to the heat catalysts 36a and 36b is used.
Is substantially constant, and the thermal catalysts 36a and 36b can be uniformly heated.

[0055]

According to the heater for the catalyst treatment section according to the present invention, the heating is performed so that the surface temperature of the cylindrical member becomes substantially uniform. When the surface temperature of the cylindrical member of the catalyst processing section heater becomes uniform, the catalyst to be heated is heated substantially uniformly, and the catalyst temperature becomes substantially equal. As a result, the difference in processing efficiency between the parts of the catalyst processing unit is reduced, and the processing capacity of the catalyst processing unit can be improved by the catalyst processing unit heater of the present invention. Further, by using the catalyst processing section heater, the temperature of the catalyst processing section heated by the radiant heat of the catalyst processing section heater becomes substantially uniform. for that reason,
The processing efficiency in the catalyst processing unit is made uniform, and the amount of the first gas that passes through the catalyst processing unit without being gas-processed is reduced.
Thereby, the gas processing capacity of the gas processing device is improved.

[Brief description of the drawings]

FIG. 1 is a transparent perspective view of a deodorizing device.

FIG. 2 is a partial cross-sectional side view of the deodorizing device.

FIG. 3 is an exploded perspective view of the deodorizing device.

FIG. 4 is a schematic cross-sectional view of a catalyst processing unit.

FIG. 5 is a cross-sectional view of a sheathed heater in which the distance between the spirals of the heating wire is relatively narrow at both ends than at the center.

FIG. 6 is a cross-sectional view of a sheathed heater in which the diameter of the spiral of the heating wire is relatively larger at both ends than at the center.

FIG. 7 is a schematic sectional view of a catalyst processing unit using a U-shaped sheathed heater.

[Description of Signs] 10 Deodorizing device 11 Casing 12 Adsorption processing unit 13 Regeneration processing unit 14 Decomposition processing unit 32 Exhaust tube (Heat exchange device) 35, 235 Second heating unit (Catalyst processing unit heater) 35a, 35b Seed heater 135a , 135b Seeds heater 235a, 235b Seeds heater 36 Catalyst processing unit 36a, 36b Thermal catalyst 51, 52, 55 Heater pipe (tubular member) 53, 53a, 54 Electric heating wire (conductive wire)

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3K092 PP20 QA01 QB27 QB42 RA01 VV22 4C080 AA05 AA07 BB02 CC01 CC12 HH05 JJ03 KK08 MM04 MM05 QQ14 QQ17 QQ20 4D048 AA22 CC40 CC53 CC63

Claims (9)

[Claims] A catalyst processing unit heater (35, 135a, 135b) for heating a catalyst processing unit (36), comprising: a tubular member (51, 52); and the tubular member (51, 52). ), The conductive wire (5) for making the surface temperature of the cylindrical members (51, 52) substantially uniform.
3, 54), and a catalyst processing section heater (35, 135a, 135) comprising:
b). 2. The heating value of the conductive wires (53, 54) at the end portions is smaller than that of the conductive wires (53, 54) at portions other than the end portions.
The heater (35, 135a, 135b) for a catalyst processing unit according to claim 1, wherein the calorific value is larger than that of (54). 3. The catalyst processing unit heater (35, 13) according to claim 2, wherein said conductive wire (53, 54) is spiral.
5a, 135b). 4. The helical spacing of the conductive lines (53, 54) at the ends is different from that of the conductive lines (5, 5) at portions other than the ends.
The heater (35, 135a, 135b) for a catalyst processing unit according to claim 3, wherein the space between the spirals (3, 54) is narrower. 5. The helical diameter of the conductive wire (53, 54) at an end portion is smaller than that of the conductive wire (5, 5) at a portion other than the end portion.
The catalyst processing unit heater (35, 135a, 135b) according to claim 3, wherein the diameter of the spiral is larger than that of the spiral of (3, 54). 6. A catalyst processing section heater (235) for heating a catalyst processing section (36), comprising: a U-shaped tubular member (55); and a U-shaped tubular member (55). ), A conductive wire (53a) for making the surface temperature of a portion of the U-shaped tubular member (55) facing the catalyst processing section (36) substantially uniform.
And a catalyst processing unit heater (235) comprising: 7. The conductive wire (53a) has a helical shape, and the spiral spacing of the conductive wire (53a) near the end of the U-shaped tubular member (55) and near the U-shaped bent portion is different. ,
7. The catalyst according to claim 6, wherein the space between the spirals of the conductive wires (53 a) in a portion other than near the end of the U-shaped tubular member (55) and in a portion other than near the U-shaped bent portion is smaller. Heater for processing section (235). 8. A catalyst processing section (36) for processing a first gas before catalyst processing to a second gas, and a catalyst processing section heater (35, 135a) according to any one of claims 1 to 7. ,
135b, 235).
0). 9. A heat exchanger (32), wherein the heat exchanger (32) is processed by the first gas sent to the catalyst processor (36) and the catalyst processor (36). The gas processing apparatus (1) according to claim 8, wherein heat exchange is performed with the second gas having a higher temperature than the first gas.
0).