JP4263827B2 - Incineration equipment for hazardous air pollutants - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an incineration processing apparatus for hazardous air pollutants that completely burns a combustion gas containing harmful air pollutants and discharges them without harm and odor.
[0002]
[Prior art]
As toxic air pollutants that have recently attracted attention, there are volatile organic compounds (hereinafter referred to as VOCs) or dioxins. VOCs include organic solvents, formic acid, etc., but these are carcinogenic. When they are released into the atmosphere, they are photochemically reacted with NO2 by the ultraviolet rays of sunlight to produce photochemical oxidants, which are harmful to animals, plants and human bodies. . Moreover, although dioxin exists in the exhaust gas of a garbage incinerator, it is well known that this dioxin is also carcinogenic and harms animals and plants and human bodies.
[0003]
As one of the processing methods for making such a gas containing harmful air pollutants (hereinafter, burned gas) harmless and odorless, there is a method of incineration. For example, in the VOC treatment, the combustion gas is heated to 250 to 300 ° C. and then brought into contact with a platinum-based catalyst and incinerated at a relatively low temperature. Further, a method has been adopted in which the combustion gas containing dioxin is rendered harmless by being retained at 800 ° C. for 2 seconds.
[0004]
However, when processing using a catalyst, if the combustion gas contains Si or the like, the activity of the catalyst is impaired (detoxified) due to the influence of Si or the like, and the initial performance may not be achieved. There is. Further, since the catalyst itself is expensive, it is necessary to perform pretreatment in order to strictly check the presence of the toxic substance or to prevent the toxic substance from being mixed into the catalyst.
[0005]
However, if the VOC is raised to a predetermined temperature (800 ° C.) with auxiliary fuel, it can be processed without worrying about catalyst poisoning, but such high temperature processing uses a large amount of heat. From the viewpoint of effective use of heat, a heat recovery device such as a boiler is provided in the processing device to generate steam, which is used, for example, for power generation.
[0006]
However, depending on the user, such a heat recovery device may not be required. In this case, the heat recovery device becomes a useless long object.
[0007]
Therefore, recently, a regenerative processing apparatus has been used in which sensible heat of exhaust gas is used for preheating the combustion gas so as to increase the thermal efficiency.
[0008]
In this heat storage type processing device, a plurality of heat storage bodies are used, and the combustion gas is switched to a valve to flow to the heat storage body, or the combustion gas is flowed to the honeycomb heat storage body by a rotating duct, There are various types.
[0009]
An example of the former switching type is shown in FIG. This heat storage type processing apparatus has a combustion reaction chamber 1 provided with a burner B on the top, and three heat storage tanks Ra, Rb, Rc are connected to the bottom wall 2 of the combustion reaction chamber 1. Inside each of the heat storage tanks Ra to c, a heat storage body H made of ceramic or the like is installed, and outside, each of the heat storage tanks Ra to c has a combustion gas containing harmful air pollutants distributed, Open / close valve Va that exhausts exhaust gas that has passed through heat storage element H ₁ ~ _Three , Vb ₁ ~ _Three , Vc ₁ ~ _Three In addition, a pipe P composed of an inlet pipe Pi and an outlet pipe Po is continuously provided.
[0010]
This apparatus heats the VOC at a high temperature by operating the three patterns shown in FIGS. That is, in the first pattern shown in FIG. 8A, the combustion target gas is the inlet pipe Pi → valve Va. ₁ → Thermal storage tank Ra → Combustion reaction chamber 1 → Thermal storage tank Rb → Valve Vb _Three → Pipe P → Blower 2 → Exit pipe Po is heated, and the exhaust gas flowing out from this exit pipe Po also contains unburned gas. ₂ → Thermal storage tank Rc → The combustion reaction chamber 10 is led to the thermal storage tank Rb for more complete combustion.
[0011]
In the figure, “◯” in the valve V portion indicates the valve “open” state, and “●” indicates the valve “closed” state.
[0012]
In the second pattern shown in FIG. 8B, the combustion gas is the inlet pipe Pi → the valve Vb. ₁ → Thermal storage tank Rb → Combustion reaction chamber 1 → Thermal storage tank Rc → Valve Vc _Three → Pipe P → Blower 2 → Exit pipe Po and part of the exhaust gas from the outlet pipe Po is P → Valve Va ₂ → heat storage tank Ra → guided to reaction chamber 10
[0013]
Similarly, in the third pattern shown in FIG. 8C, the combustion target gas is the inlet pipe Pi → valve Vc. ₁ → Thermal storage tank Rc → Combustion reaction chamber 1 → Thermal storage tank Ra → Valve Va _Three → Pipe P → Blower 2 → Exit pipe Po and part of exhaust gas from outlet pipe Po is P → valve Vb ₂ → heat storage tank Rb → guided to reaction chamber 10
[0014]
In addition, the rotary duct type is disclosed in Japanese Patent Application Laid-Open No. Hei 6-281131 proposed by the applicant of the present application. This heat storage type processing apparatus is a honeycomb heat storage body than a duct rotating combustion gas. The combustion gas is heated by the heat storage body heated by the exhaust gas, and the energy saving effect is extremely high.
[0015]
[Problems to be solved by the invention]
However, in the former switching-type regenerative processing device, high-temperature gas flows through the valve portion that switches the flow of the combustion gas, so that the heat-resistance limit of the valve or the like may be exceeded and damage may occur in a short time. Yes, it is not suitable for long-term use.
[0016]
In the latter rotary duct type, although there is no such fear, when the combustion gas flows from the rotating duct toward the fixed heat storage body, the combustion gas is likely to be mixed into the burned gas. In addition, there is a possibility that a part of the combustion gas flows out without being incinerated, and it is necessary to seal between both the rotating duct and the heat storage body. In particular, it is extremely troublesome to seal between the rotating portion and the fixed portion at a high temperature of 400 to 600 ° C. or higher, and the above-mentioned configuration is not configured to cope with the high temperature. It is impossible to treat combustion gases containing harmful air pollutants at high temperatures.
[0017]
For this reason, it is not preferable to treat the combustion gas at a high temperature of 800 ° C. like the combustion gas containing dioxin, and the combustion gas containing harmful air pollutants can be safely used for a long time. The fact is that there is a long-awaited appearance of an innocuous and bromide-free device.
[0018]
The present invention has been made in order to solve the problems associated with the above-described conventional technology, and it is possible to prevent harmful air pollutants that can be incinerated so that the burned gas can be safely harmless and non-brominated over a long period of time even at extremely high temperatures. The purpose is to provide incineration.
[0019]
[Means for Solving the Problems]
The object of the present invention is achieved by the following means.
[0020]
(1) A breathable heat accumulator is provided in the opening formed in the sealed combustion chamber, and one duct is coaxially connected to the heat accumulator, and the duct containing harmful air pollutants is contained in the duct. Combustion gas duct through which combustion gas circulates and exhaust gas duct through which the combustion gas burns in a combustion chamber and exhaust gas after passing through the heat storage body circulates, the heat storage body and duct And the sensible heat of the exhaust gas is transmitted to the combustion gas via the heat storage body, and the combustion gas flows out of the heat storage body into the combustion chamber. After that, a partition plate is provided inside so as to stay in the combustion chamber for a predetermined time until it flows into the heat storage body again.
[0021]
(2) The combustion chamber has an auxiliary burner that raises the temperature to a predetermined temperature at which the combustion gas completely burns. Ruko And features.
[0022]
(3) The duct is characterized in that clean air flows along the outer periphery of the duct and then flows into the combustion chamber through a gap between the heat storage body and the combustion chamber.
[0023]
(4) The duct has substantially the same cross-sectional area as the heat storage body, and is connected to the heat storage body through a small gap.
[0024]
(5) The clean air flows through the support mechanism that supports the heat storage body and flows into the gap.
[0025]
(6) The clean air flows in the combustion chamber after flowing along the boundary between the combustion gas passage and the exhaust gas passage of the heat storage body.
[0026]
(7) The region of the heat storage body through which the clean air flows has a width of at least one honeycomb.
[0027]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the invention will be described with reference to the drawings.
[0028]
FIG. 1 is an overall schematic view showing a first embodiment of the present invention, FIG. 2 is a schematic longitudinal sectional view showing a main part of the incineration processing apparatus, and FIGS. 3 and 4 are lines 3-3 and 4- in FIG. It is a schematic horizontal sectional view in alignment with 4 lines.
[0029]
If the incineration processing apparatus according to the present invention is outlined with reference to FIG. 1, the incineration processing apparatus is provided with a duct portion 30 connected to a heat storage body 13 rotatably provided in the combustion chamber 10. For example, a combustion gas supply unit 40 that feeds a relatively high temperature odor gas (hereinafter referred to as combustion gas) containing harmful air pollutants such as VOC or dioxin discharged from a garbage incinerator, and the combustion chamber The exhaust gas discharge part 50 which discharges the exhaust gas after combustion gas burns in 10 and the seal which supplies seal air to the required seal part between the rotating part and the fixed part of the heat storage body 13 and the duct part 30 An air supply unit 60 is connected to the combustion chamber 10, and an auxiliary burner B for increasing the combustion temperature in the combustion chamber 10 is connected to the combustion chamber 10.
[0030]
The first embodiment of the present invention will be described in more detail. As shown in FIG. 2, the combustion chamber 10 of the first embodiment is a substantially sealed space made of a refractory material such as a refractory brick. The plurality of legs 11 are vertically supported.
[0031]
The combustion chamber 10 has an opening 12 in the bottom wall 10a, in which a ceramic porous honeycomb-shaped heat storage body 13 is rotatably provided, and the honeycomb heat storage body 13 faces the top wall 10b. A partition wall 15 is also provided.
[0032]
The partition wall 15 has an end fixed to the inner peripheral surface of the combustion chamber 10 and extends along the axis of the combustion chamber 10. However, as shown in FIG. The region G1 in which the combustion gas flows is narrower than the region G2 in which the exhaust gas flows. As described in detail later, the reason why the shape is "<" is to allow the exhaust gas to flow through the large region G2 and to effectively take in the heat storage body 13 the heat held by the exhaust gas from a wide range.
[0033]
Further, a communication portion 16 is formed between the tip end portion in the axial direction of the partition wall 15 and the top wall 10b so that the combustion gas flows in a U-turn. In this way, even if the combustion chamber 10 is not increased in size, it is possible to ensure a length of passage that allows the combustion gas to stay in the combustion chamber 10 for a predetermined time, which is extremely advantageous in terms of space.
[0034]
In order to rotatably support the honeycomb heat storage body 13, for example, as shown in FIGS. 2 and 3, one end of the support shaft S is fixed to the center of the honeycomb heat storage body 13 and penetrates through the center of the duct portion 30. The bearing J is rotatably supported. A gear 19 is attached to the other end of the support shaft S, and the gear 19 and the drive gear 20 driven by the motor M are connected via a chain.
[0035]
Further, the honeycomb heat accumulator 13 is provided with a support ring 18 protruding radially outward at a lower end portion, and the support ring 18 is supported by a support plate 17 via a bearing J. The support ring 18 is provided with a through hole O through which clean air, which will be described in detail later, passes.
[0036]
In this way, if the honeycomb heat accumulator 13 is erected vertically and supported using its gravity, even the honeycomb heat accumulator 13 exposed under high temperature can be supported rotatably with a relatively simple configuration. Although advantageous, the present invention is not limited to this, and may be a so-called horizontal type in which the honeycomb heat accumulator 13 is attached from the side portion of the combustion chamber 10 placed horizontally.
[0037]
The duct portion 30 has substantially the same cross-sectional area as the honeycomb heat storage body 13, and the gap X is a small gap with the honeycomb heat storage body 13. ₂ It is connected through. In this way, the combustion gas can be smoothly guided to the combustion chamber 10.
[0038]
The inside of the duct portion 30 is partitioned by a partition plate 31 extending along the axis, and the partition plate 31 also has a substantially “<” shape in cross section perpendicular to the axis, like the partition wall 15. It is said that. A duct 41 of the combustion gas supply unit 40 is connected to the duct 32 in the narrow region, and a duct 51 of the exhaust gas discharge unit 50 is connected to the duct 33 in the relatively large region. Thus, the exhaust gas distribution region G ₂ Combustion gas distribution area G ₁ The larger is that the exhaust gas and the honeycomb heat accumulator 13 are brought into contact with each other over a wide range, the heat held by the exhaust gas is more effectively taken into the honeycomb heat accumulator 13, a large amount of heat is recovered, and the exhaust gas is discharged together with the exhaust gas. The honeycomb heat accumulator 13 has a structure in which the gas flow flowing in from one end flows out through the same flow path to the other end. Therefore, the combustion gas passes through the honeycomb heat storage body 13 from the duct 32 and is in the region G. ₁ The exhaust gas flows into the region G ₂ From the duct 33 through the honeycomb heat accumulator 13.
[0039]
The duct portion 30 is fixedly attached to the combustion chamber 10 in a fixed position, and the honeycomb heat storage body 13 is rotatable. Therefore, the gap between the duct portion 30 of the position fixing portion and the honeycomb heat storage body 13 of the rotation portion is between Need to be sealed. In this embodiment, this sealing is performed by supplying air, and sealing is performed by introducing clean sealing air from the sealing air supply unit 60.
[0040]
The seal air supply unit 60 includes a seal air duct 61 through which air from a blower or the like flows. The sealed air duct 61 communicates with an outer peripheral duct 62 provided so as to cover the duct portion 30, and an annular air outlet 62 a is opened at the tip of the outer peripheral duct 62.
[0041]
Accordingly, the clean room temperature air fed from the sealing air supply unit 60 is caused to flow along the outer periphery of the duct 30 by the outer duct 62, so that the duct 30 heated by the exhaust gas is heated to some extent. The function of collecting the heat of the gas and introducing it to the combustion chamber 10 and the clearance X from the air outlet 62a through the through hole O of the support ring ₁ When the air is blown out toward the combustion chamber 10, the gap X ₂ The function of returning the combustion gas leaked from the fuel to the combustion chamber 10 is exhibited.
[0042]
The tip of the support shaft S provided at the center of the honeycomb heat accumulator 13 is provided with a sealing material made of metal wool W made of a heat-resistant metal or the like, and seals between the partition wall 15.
[0043]
When the combustion gas containing VOC and dioxin which are harmful air pollutants introduced into the incinerator is made harmless and odorless, it is retained at a high temperature of 800 ° C. for a predetermined time (for example, 2 seconds). Although it is necessary, when this combustion gas flows into the combustion chamber 10 at 400 to 600 ° C., it is necessary to raise the temperature of the combustion gas by about 200 to 300 ° C.
[0044]
Therefore, in the present embodiment, the auxiliary burner B is installed in the combustion chamber 10 in the vicinity of the honeycomb heat accumulator 13 in order to burn the combustion gas flowing from the combustion gas duct 32 through the combustion gas passage 13a. Then, a small amount of auxiliary fuel is combusted so that the inside of the combustion chamber 10 reaches a high temperature state of 800 ° C. However, it is preferable to control the flow rate so that the flow of the combustion gas stays in the combustion chamber 10 for at least 2 seconds.
[0045]
Next, the operation of the first embodiment will be described.
[0046]
First, the blower and the like of the seal air supply unit 60 are driven together with the motor M. The drive gear 20 is rotated by driving the motor M, and this rotation is transmitted to the honeycomb heat accumulator 13 via the chain and the gear 19. Since the support ring 18 attached to the lower end of the honeycomb heat storage body 13 is supported by the support plate 17 of the outer duct 62 via the bearing J, the honeycomb heat storage body 13 rotates smoothly without relatively frictional resistance. This rotation is preferably at a low speed of about 2 to 4 rpm in view of thermal efficiency.
[0047]
In addition, clean room temperature air passes through the seal air duct 61 by driving a blower or the like, and the outer duct. 62 Is blown out. The air flows while cooling the bearing J, passes through the through hole O of the support ring 18, and the clearance X ₁ Through the combustion chamber 10.
[0048]
In this state, when a relatively high temperature combusted gas containing harmful air pollutants discharged from a garbage incinerator or the like is fed into the duct 32 from the combusted gas supply unit 40, most of the combusted gas is in the honeycomb. Combustion chamber through heat storage 13 10 Into the region G1.
[0049]
And if the temperature of this to-be-combusted gas is 800 degrees C or less, in order to raise this, the auxiliary burner B will be ignited and the to-be-combusted gas which entered the combustion chamber 10 will be heated up immediately.
[0050]
As a result, the combustion gas moves in the combustion chamber 10 along the partition wall 15 in a state where a high temperature of 800 ° C. is maintained, and flows in a U-turn through the communication portion 16. When the residence time in the combustion chamber 10 elapses for a predetermined time (2 seconds), harmful air pollutants such as VOC or dioxin in the combustion gas are also treated during this time, and the honeycomb becomes a harmless and odorless exhaust gas. It is discharged through the heat storage body 13.
[0051]
In this case, the residence time of the combustion gas is the combustion chamber 10 Can be controlled by the relationship between the length of the passage partitioned by the partition plate 15 and the flow rate of the combustion gas, but in this embodiment, the passage is made by the partition plate 15 so that the combustion gas having a predetermined flow rate has a predetermined residence time. Therefore, it is only necessary to flow the combustion gas continuously without having to control the flow velocity, temperature, residence time, etc. of the combustion gas. Since no control device is required, it is advantageous in terms of cost.
[0052]
In particular, in the case of the switching type, the instantaneous combustion gas may short pass, but in this embodiment, since it is a unidirectional flow, there is no short pass and the residence time is stably maintained. be able to.
[0053]
The high-temperature exhaust gas passing through the honeycomb heat accumulator 13 heats the honeycomb heat accumulator 13, so if the heated portion of the honeycomb heat accumulator 13 moves to the area of the duct 32, Combustion gas is preheated, and thereby effective use of heat is achieved.
[0054]
While processing the combustion gas in this way, a part of the combustion gas or the exhaust gas is Combustion chamber 10 and Gap X between the honeycomb heat accumulator 13 ₁ Or a gap X between the partition plate 31 and the honeycomb heat storage body 13 ₂ The combustion gas or exhaust gas is attracted by the seal air or bypass is blocked, and all of the combustion gas or exhaust gas is discharged into the combustion chamber 10 and is heated in the same manner as the gas.
[0055]
In other words, since there is a gap between the rotating honeycomb heat accumulator 13 and the position-fixed duct 30, even if an internal leak occurs, all of this is sent into the combustion chamber 10 and into the exhaust gas. The untreated gas is also recirculated and reprocessed by this leak gas treatment effect, and a more complete gas treatment is performed. There is no possibility that the burned gas leaks outside without being treated.
[0056]
In this way, the burned gas containing harmful air pollutants is made odorless and harmless and released to the atmosphere. In the present embodiment, the burned gas is continuously passed through the duct 30 and the heat storage body 13. Therefore, it is not necessary to use a valve for switching the flow, so that continuous operation over a long period of time is possible, thermal loss can be suppressed, and thermal efficiency is greatly improved.
[0057]
A second embodiment of the present invention will be described.
[0058]
FIG. 5 is a schematic longitudinal sectional view showing an essential part of a second embodiment according to the present invention, and FIGS. 6 and 7 are schematic horizontal sectional views taken along lines 6-6 and 7-7 in FIG. The same reference numerals are given to members common to the members shown in 1-4, and description thereof is omitted.
[0059]
As shown in FIG. 5, the incineration processing apparatus according to the present embodiment achieves compactness by directly driving the honeycomb heat accumulator 13 by the motor M, and clean air also in the central portion of the honeycomb heat accumulator 13. Is to be introduced.
[0060]
The combustion chamber 10 is provided with a partition wall 15 so as to divide the combustion chamber 10 into two parts from the honeycomb heat accumulator 13 toward the top wall 10b. However, it goes without saying that the partition wall 15 may have a “<” shape as in the first embodiment.
[0061]
As shown in FIGS. 6 and 7, the honeycomb heat accumulator 13 is supported by forming a recess 12a on the lower end side of the opening 12 of the combustion chamber 10 and placing a support plate 17 on the bottom wall so as to cover the recess 12a. Attach to 10a. On the other hand, the honeycomb heat accumulator 13 is provided with a support ring 18 at its lower end so as to protrude outward in the radial direction, and a gear 19 is attached to the support ring 18, and between the gear 19 and the support plate 17. Further, a support mechanism K is formed with felt or grease (both not shown) to support the honeycomb heat accumulator 13.
[0062]
A drive gear 20 is engaged with the gear 19, and the drive gear 20 is driven by a motor M attached to the support plate 17, so that the honeycomb heat accumulator 13 is rotated via the gear 19 and the support ring 18. It is configured. The support ring 18 and the gear 19 may be formed integrally, but may be separate as shown.
[0063]
The inside of the duct part 30 is divided into two by a partition plate 31 extending along the axis, and a duct 41 of a combustion gas supply part 40 for supplying the combustion gas is connected to one half duct 32. In addition, a duct 51 of the exhaust gas discharge part 50 is connected to the other half duct 33. Also in this case, it is needless to say that the partition plate 31 may have a cross-section “<” shape as in the first embodiment.
[0064]
Therefore, one half duct 32 functions as a combustion gas duct, and the other half duct 33 functions as an exhaust gas duct. However, the honeycomb heat accumulator 13 flows from one end. Therefore, the half region of the honeycomb heat accumulating body 13 communicated with the combustion gas duct 32 constitutes the combustion gas passage 13a. The half region of the honeycomb heat storage body 13 communicated with the exhaust gas duct constitutes the exhaust gas flow path 13b.
[0065]
The duct 61 for the sealing air communicates the recess 12a in which the support mechanism K that supports the heat storage body 13 is housed with the outer peripheral duct 62. In particular, in this embodiment, the sealing air is used for heat storage. There is also a central duct 63 that flows along the boundary between the combusted gas flow path 13a and the exhaust gas flow path 13b of the body 13, and the central duct 63 and the outer peripheral duct 62 communicate with each other.
[0066]
That is, as shown in FIGS. 5 and 7, the outer peripheral duct 62 discharges clean room temperature air fed from the sealing air supply unit 60 from the air outlet 62 a, and the rotating unit between the duct 30 and the honeycomb heat storage body 13. It is made to flow toward the recess 12a between the fixed portion and the outer periphery of the duct 30.
[0067]
On the other hand, the central duct 63 extends in the radial direction through the center of the duct 30 and is provided so as to face the end face of the honeycomb heat storage body 13. The gas is discharged from the outlet 63a and flows along the boundary between the combusted gas passage 13a and the exhaust gas passage 13b of the honeycomb heat storage body 13.
[0068]
In particular, since the air blown from the air outlet 62a of the outer duct 62 to the support mechanism K of the honeycomb heat storage body 13 is relatively low in temperature, the support mechanism K having grease or the like is cooled, and the support mechanism K There is no problem even if grease or felt is used for the support, and a relatively simple and reliable support or seal becomes possible.
[0069]
Further, the central duct 63 is mainly formed by a gap X formed between the duct 30 through which the combustion gas and exhaust gas circulate and the honeycomb heat storage body 13. ₂ The combustion gas and the exhaust gas are prevented from leaking as much as possible. ₂ Thus, even if the combustion gas and the exhaust gas are mixed with each other, they are recirculated and combusted, and the combustion gas leaks directly to the outside, or is included in the exhaust gas circulating in the duct 33. It is possible to prevent a part of the exhaust gas that is not completely burned out from leaking directly to the outside, and complete gas treatment by recirculation combustion.
[0070]
The width of the central duct 63 is not particularly limited, but the ceramic honeycomb heat accumulator 13 may have at least one honeycomb size. According to experiments, it is preferable to have a width of 2 to 10 times the honeycomb mesh.
[0071]
Next, the operation of the second embodiment will be described.
[0072]
The blower of the seal air supply unit 60 is driven together with the motor M. The drive gear 20 is rotated by driving the motor M, and this rotation is transmitted to the honeycomb heat storage body 13 via the gear 19.
[0073]
Also, clean room temperature air passes through the seal air duct 61 by the drive of the blower, and the outer peripheral duct. 62 And central duct 63 Is blown out. Outer duct 62 The air blown from the air flows around the honeycomb heat storage body support mechanism K in the recess 12a, and suppresses the temperature rise of the support mechanism K while suppressing the gap X. ₁ Through the combustion chamber 10. Also the central duct 63 The air blown out from the gap is a gap X between the honeycomb heat accumulator 13 and the tip of the partition plate 31. ₂ And enters the combustion chamber 10 while attracting the surrounding gas and the like.
[0074]
In this state, when a relatively high temperature combusted gas containing harmful air pollutants discharged from a garbage incinerator or the like is fed into the duct 32 from the combusted gas supply unit 40, most of the combusted gas is in the honeycomb. Combustion chamber through heat storage 13 10 Flows in. If the temperature of the combustion gas is 800 ° C. or lower, the temperature is raised by the auxiliary burner B.
[0075]
As a result, the combustion gas moves in the combustion chamber 10 along the partition wall 15 while maintaining a high temperature of 800 ° C., and is U-turned through the communication portion 16 to flow in the combustion chamber 10. When the residence time elapses for a predetermined time (2 seconds), harmful air pollutants such as VOC or dioxin in the combustion gas are also processed and discharged as harmless and odorless exhaust gas.
[0076]
In this case, a part of the combustion gas or exhaust gas is Combustion chamber 10 And gap X between honeycomb heat storage element 13 ₁ Through the recess 12a and the gap X between the partition plate 31 and the honeycomb heat storage element 13 ₂ May flow into the half duct 32 or 33 through the gas, but the combustion gas or exhaust gas is attracted by the seal air, and is exhausted to the combustion chamber 10 and is heated in the same manner as the gas. .
[0077]
Therefore, even if there is untreated gas in the exhaust gas, it is recirculated and reprocessed, and a more complete gas treatment is performed.
[0078]
The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims. Although the embodiment described above rotates the honeycomb heat storage body 13 side, the present invention may be configured to rotate not only this but also the duct portion 30 side. It is sufficient that relative rotational displacement is performed.
[0079]
Moreover, in the said embodiment, one combustion chamber 10 One honeycomb heat storage body 13 is provided in one combustion chamber. 10 It is also possible to provide a large number of honeycomb heat storage elements 13.
[0080]
Furthermore, in the embodiment, the honeycomb heat storage body 13 Uses ceramics as the heat-resistant material, but it may be a honeycomb heat storage body made of metal or the like.
[0081]
【The invention's effect】
As described above, according to the present invention, the following effects can be obtained.
[0082]
1) Combustion gas stays for a predetermined time depending on the length of the passage formed by the partition plate in the combustion chamber, so that the control of the residence time of the combustion gas is simple and easy, and complicated control is performed. No equipment is required.
[0083]
In addition, heat treatment can be performed while continuously flowing the flow of the burned gas through the duct to the heat accumulator, and since there is no need for a valve to switch the flow, continuous operation over a long period of time is possible and thermal loss is also suppressed. And the thermal efficiency is greatly improved.
[0084]
2) Clean air is allowed to flow between the rotating part and the fixed part of the duct and the heat accumulator and along the boundary between the combustion gas passage and the exhaust gas passage of the heat accumulator and flow into the combustion chamber. Therefore, even with a simple sealing configuration, there is no possibility of the combustion gas etc. leaking to the outside, the sealing performance of the rotating part is enhanced, the reliability of the apparatus is improved, and maintenance is facilitated.
[0085]
3) Since the auxiliary burner for raising the temperature up to the temperature at which the combustion gas completely burns is provided, the combustion gas can be harmless and non-bromated only by sensing the temperature.
[0086]
4) When the duct and the heat accumulator are rotated and displaced relative to each other, clean air is made to flow into the contact point between the two and this flows into the combustion chamber. However, it is extremely preferable as a gas to be treated at a high temperature of 800 ° C. like a combustion gas containing dioxin.
[0087]
5) Since clean air is allowed to flow along the boundary between the combustion gas passage and the exhaust gas passage of the honeycomb heat storage body from the air blowing nozzle having the width of at least one honeycomb in the honeycomb heat storage body, Heat treatment can be performed without mixing gas and exhaust gas, which simplifies the configuration of the incineration processing apparatus and is advantageous in terms of cost.
[Brief description of the drawings]
FIG. 1 is a schematic explanatory diagram of an incineration processing apparatus according to the present invention.
FIG. 2 is a schematic longitudinal sectional view showing a main part of the incineration processing apparatus according to the first embodiment of the present invention.
FIG. 3 is a schematic horizontal sectional view taken along line 3-3 in FIG.
4 is a schematic horizontal sectional view taken along line 4-4 of FIG.
FIG. 5 is a schematic longitudinal sectional view showing a main part of an incineration processing apparatus according to a second embodiment of the present invention.
6 is a schematic horizontal sectional view taken along line 6-6 of FIG.
7 is a schematic horizontal sectional view taken along line 7-7 in FIG.
FIGS. 8A and 8B are schematic views showing a conventional switching type processing apparatus, where FIG. 8A shows a first pattern state, FIG. 8B shows a second pattern state, and FIG. 8C shows a third pattern state. It is.
[Explanation of symbols]
10 ... combustion chamber,
10a ... bottom wall,
12 ... opening,
13 ... Honeycomb heat storage body,
13a ... Combustion gas flow path,
13b ... exhaust gas flow path,
15 ... partition plate,
30 ... duct part,
32 ... Combusted gas duct,
33 ... exhaust gas duct,
B ... Auxiliary burner,
K ... Support mechanism,
X ₁ , X ₂ ... the gap.

Claims (4)

A breathable heat storage body (13) is provided in the opening (12) opened in the sealed combustion chamber (10), and a duct (30) is coaxially connected to the heat storage body (13). (30), a combusted gas duct (32) through which the combusted gas containing harmful air pollutants flows, and the combusted gas burns in the combustion chamber (10), and the heat storage body (13) The exhaust gas duct (33) through which the exhaust gas after passing through is formed, and by rotating the heat storage body (13) and the duct (30) relatively, the sensible heat of the exhaust gas is stored in the heat storage body. (13) In the incineration treatment apparatus adapted to be transmitted to the combustion gas via
After the gas to be burned flows out of the heat storage body (13) into the combustion chamber (10), it stays in the combustion chamber (10) for a predetermined time until it flows into the heat storage body (13) again. Provide a partition plate (15),
The duct (30) passes through the gap (X ₁ ) between the heat storage body (13) and the combustion chamber (10) after clean air flows along the outer periphery of the duct (30). To flow into the combustion chamber (10)
The duct (30) has substantially the same cross-sectional area as the heat storage body (13), and is connected to the heat storage body (13) through a small gap (X2),
A central duct ( 63 ) extending radially through the center of the duct ( 30 ) and facing the end face of the heat storage body ( 13 ) via the gap (X 2 ) ;
The central duct ( 63 ) includes the combustion chamber (10) after the clean air flows along the boundary between the combustion gas passage (13 a) and the exhaust gas passage (13 b) of the heat storage body (13). An incineration processing apparatus characterized in that it is configured to flow into the inside.   The incineration apparatus according to claim 1, wherein the combustion chamber (10) has an auxiliary burner (B) for raising the temperature to a predetermined temperature at which the combustion gas is completely combusted. 2. The incineration apparatus according to claim 1, wherein the clean air flows into the gap (X ₁ ) through a support mechanism (K) that supports the heat storage body (13).   The incineration apparatus according to claim 1, wherein the region of the heat storage body (13) through which the clean air flows has a width of at least one honeycomb.

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