JP4022635B2 - Chemical reactor - Google Patents

Description

  The present invention relates to a chemical reactor that promotes a chemical reaction of a reactant by irradiation with microwaves.

  Conventionally, by irradiating the irradiated object with microwaves, the molecules contained in the irradiated object are vibrated to generate frictional heat between the molecules, or to promote the reaction between the molecules. It is known that the irradiated object can be heated. For this reason, proposals have been made to heat various objects to be irradiated by microwaves.

  For example, Patent Document 1 describes an oil and fat heating apparatus that heats oil and fat by microwaves. This oil and fat heating device includes an outer shell body having a square box shape and a flow pipe penetrating the outer shell body. The outer shell body is provided with a microwave inlet for introducing a microwave into the outer shell body. Oils and fats are distributed inside the distribution pipe. And the said fats and oils heating apparatus is comprised so that the fats and oils inside this distribution pipe may be heated uniformly by irradiating the microwave introduce | transduced from the said microwave inlet from the outer side of the said distribution pipe.

  Patent Document 2 describes a liquid heating apparatus that heats a liquid such as a fluid liquid or a chemical liquid. This liquid heating apparatus includes three outer shell bodies that form a rectangular box shape, and a transfer pipe that passes through these outer shell bodies. The transfer pipe transfers the liquid to each outer shell body by circulating the liquid inside. Each outer shell is a heating unit, a cooling unit, and a pressurizing unit. The heating unit irradiates microwaves from the outside of the transfer tube to heat the liquid. The liquid heating apparatus is configured to heat and sterilize the liquid under pressure without changing the composition of the liquid by heating and immediately cooling the liquid.

Patent Document 3 describes a method of promoting a chemical reaction of a reactant by using a reactant as an object to be irradiated and irradiating the reactant with microwaves. The reactant comprises an alkaline aqueous solution and waste plastic. The waste plastic carries a raw material powder excellent in microwave absorption characteristics and a metal powder that generates hydrogen by being in contact with an alkaline aqueous solution. The generated hydrogen is used to dechlorinate waste plastics, and the dechlorination is accelerated by microwave irradiation. In this method, a box-shaped outer shell is used. The alkaline aqueous solution is stored inside the outer shell body, the waste plastic is accommodated, and the microwave is irradiated.
JP-A-7-123918 JP-A-10-27685 JP 2003-213034 A

  By the way, the said conventional heating apparatus etc. irradiate the to-be-irradiated object directly with the microwave from the outside of the flow pipe etc. in which the to-be-irradiated object is accommodated. Here, when the conventional heating device or the like is diverted as a chemical reaction furnace and the irradiated material is used as a reactant and the chemical reaction of the reactant is promoted by microwave irradiation, the reactant is, for example, an organic solvent or the like Most of them have polarities, and most exhibit high absorption characteristics with respect to microwaves. In such a reactive substance, microwaves are absorbed only by the surface of the irradiated portion due to high absorption characteristics, so that it is difficult for the microwaves to reach the inner depth (center). Therefore, in the chemical reactor, although the chemical reaction is promoted on the surface irradiated with microwaves, the chemical reaction is not promoted in the inner part (center) of the reactant, and the reaction rate is lowered. Become. On the other hand, the chemical reactor can be configured so that the microwave reaches the inside (center) of the reactant by reducing the diameter of the flow pipe or the like, or by reducing the amount of the reactant. It becomes. However, in such a case, although the reaction rate is improved, it is difficult to avoid a reduction in the amount of the reaction material.

  The present invention has been made paying attention to such problems existing in the prior art. An object of the present invention is to provide a chemical reaction furnace capable of improving the reaction rate without reducing the throughput of the reactants.

In order to achieve the above object, the invention of a chemical reactor according to claim 1 irradiates a reactant containing at least one of gas, liquid, and powder with microwaves, and A chemical reaction furnace for promoting a chemical reaction, comprising a cylindrical outer shell and a cylindrical partition housed inside the outer shell, between the outer shell and the partition An irradiation means for accommodating the reactant in the reaction chamber as a reaction chamber, forming the partition body with a transmission material that transmits microwaves, and irradiating the inside of the partition body with microwaves; And arranged to irradiate the reactants with microwaves from the irradiating means through the partition body, and the outer shell body or the partition body has an introduction path and a discharge path communicating with the reaction chamber. And introducing the reactant from the introduction path, By discharging from the exit path, the reactant is circulated in the reaction chamber, and a groove or a ridge extending on the inner surface of the outer shell body or the outer surface of the partition body in parallel or spirally with respect to the axial direction thereof. The gist of the present invention is to provide a guide portion composed of the following to guide the flow direction of the reactant in a certain direction .

According to the above configuration, the reaction chamber for storing the reactant is formed by a space formed between the cylindrical outer shell and the cylindrical partition. Then, by adjusting the difference between the inner diameter of the outer shell body and the outer diameter of the partition wall, that is, the height of the reaction chamber, the microwaves are allowed to pass through the reactants while the reactants absorb the microwaves. It becomes possible to comprise. Therefore, it is possible to suppress the microwave from being absorbed only on the surface of the reactant. On the other hand, the processing amount of the reactant can be increased or decreased by arbitrarily adjusting the inner diameter of the outer shell body and the outer diameter of the partition wall body. In addition, when the outer diameter of the partition wall is enlarged or reduced as the processing amount increases or decreases, the area of the inner surface of the partition wall, that is, the microwave irradiation area is also enlarged or reduced according to the increase or decrease of the outer diameter. Therefore, the influence on the microwave irradiation amount due to the increase / decrease in the processing amount is negligibly small. Therefore, it is possible to provide a chemical reaction furnace capable of improving the reaction rate without reducing the amount of the reactant processed.
Further, by circulating the reactant, local absorption of microwaves by a part of the reactant can be suppressed. Furthermore, the microwave can be uniformly absorbed by the entire reactant by setting the flow direction of the reactant to a constant direction.

According to a second aspect of the present invention, there is provided the chemical reactor according to the first aspect , wherein a catalyst for promoting a chemical reaction of the reactant is accommodated in the inner surface of the outer shell or the outer surface of the partition wall. The gist is that a catalyst housing portion is provided.

According to the above configuration, the anti JSAP quality is brought into contact with the catalyst, it is possible to prevent the portion of the reaction mass is unreacted. As a result, the chemical reaction of the reactant can be promoted uniformly.

The invention of a chemical reaction furnace according to claim 3 is the invention according to claim 1 or claim 2 , wherein the light detection means for detecting light generated inside the partition body or inside the reaction chamber, The gist of the present invention is to provide stop means for stopping microwave irradiation according to the detection result of the light detection means.

The invention of a chemical reactor according to claim 4 is the invention according to any one of claims 1 to 3 , wherein a sound wave detecting means for detecting a sound wave generated inside the reaction chamber, and the sound wave The gist is that stop means for stopping the microwave irradiation is provided according to the detection result of the detection means.

  According to the above configuration, abnormalities accompanying the generation of light, such as heating due to boiling of reactants, bump heating, arc discharge due to local concentration of microwaves, and the like can be detected by the light detection means. Abnormalities accompanied by the generation of sound such as boiling of the reactant and bumping can be detected by the sound wave detecting means. And by providing a stop means for stopping the microwave irradiation according to the detection results of the light detection means or the sound wave detection means, the heating of the reactant can be stopped quickly when an abnormality occurs. . As a result, the reactant can be stably heated.

The invention of a chemical reactor according to claim 5 is the invention according to any one of claims 1 to 4 , wherein the microwave is transmitted by the outer shell body, the partition body, and the reactant. The gist of the waveguide is that it transmits only fundamental mode microwaves.

  According to the above configuration, the outer shell body, the partition wall body, and the waveguide made of the reactive substance can be of a resonance type. As a result, the microwave can be resonated and the attenuation or loss of the microwave can be suppressed.

The invention of a chemical reactor according to claim 6 is the invention according to any one of claims 1 to 4 , wherein the microwave is transmitted by the outer shell body, the partition body, and the reactant. It is assumed that a waveguide is constructed, and the wavelength of microwaves under vacuum conditions is a reference wavelength, and the waveguide transmits microwaves having a wavelength twice or more of the reference wavelength. And

  According to the above configuration, the outer shell body, the partition wall body, and the waveguide made of the reactive substance are non-resonant, and can suitably transmit higher-order mode microwaves. As a result, the microwave can be scattered over the entire inner surface of the partition wall.

Invention of the chemical reactor of claim 7 is the invention according to any one of claims 1 to 6, the partition member provided between the partition wall member and the outer shell, the partition wall The gist is that the reaction chamber is divided into a plurality of reaction chambers by a material, and the partition material is formed of a permeable material that transmits microwaves.

  According to the above configuration, by providing a plurality of reaction chambers, it is possible to increase the amount of processing per unit time, shorten the processing time, and the like. As a result, it is possible to improve processing efficiency.

  As described above in detail, according to the present invention, it is possible to provide a chemical reaction furnace capable of improving the reaction rate without reducing the throughput of the reactant.

Hereinafter, an embodiment embodying the present invention will be described.
The chemical reactor in this embodiment is for accelerating the chemical reaction of the reactants. The reactant includes at least one of gas, liquid, and powder. That is, the reactant is a simple substance composed of only gas, liquid or powder, or a mixture composed of liquid and powder, gas and powder, liquid and gas, or the like. The reactant includes a molecule having polarity and has a property of absorbing microwaves. The reactants generate heat by absorbing microwaves and cause chemical reactions such as chemical synthesis and chemical decomposition. In the case where the reactant is a mixture, it is sufficient that at least one of the reactants has a property of absorbing microwaves. Further, the microwave is an electromagnetic wave having a frequency of 300 MHz to 300 GHz and a wavelength of 1 mm to 1 m.

  FIG. 1 is a side sectional view of the chemical reaction furnace 10. The chemical reaction furnace 10 includes an outer shell body 11 and a partition wall body 12 accommodated inside the outer shell body 11. The outer shell body 11 and the partition wall body 12 are each formed in a cylindrical shape. The outer shell body 11 is formed so that its inner diameter is larger than the outer diameter of the partition wall body 12. The partition body 12 is concentrically arranged with respect to the outer shell body 11 so that the respective axes coincide with each other. Therefore, a space is formed between the outer shell body 11 and the partition wall body 12 so as to have a constant height. The space is used as a reaction chamber 13, and the reactant is stored in the reaction chamber 13.

  In the outer shell 11, an introduction pipe 21 is connected to the outer surface of one end (the right end in FIG. 1). The introduction pipe 21 is formed in a cylindrical shape, and the inside thereof is an introduction path 22. On the other hand, in the outer shell 11, a discharge pipe 23 is connected to the outer surface of the other end (left end in FIG. 1). The discharge pipe 23 is formed in a cylindrical shape, and the inside thereof is a discharge path 24. The introduction path 22 and the discharge path 24 are in communication with the reaction chamber 13. The reactant is circulated in the reaction chamber 13 by being discharged from the discharge passage 24 through the reaction chamber 13 while being introduced into the reaction chamber 13 from the introduction passage 22. The outer shell 11 is disposed such that the introduction pipe 21 faces downward and the discharge pipe 23 faces upward. This is because, when the discharge pipe 23 is directed downward, the flow rate at the time of discharge of the reactant becomes faster than that at the time of introduction due to the influence of universal gravitation and the like, and bubbles or the like may be formed in the reaction chamber 13. is there.

  A guide groove 31 as a guide portion is provided on the inner surface of the outer shell body 11. A plurality of the guide grooves 31 are formed in parallel so as to form a spiral shape. The reactant is guided by the guide groove 31 so that the flow direction thereof is a constant direction. Further, inside the guide grooves 31 is accommodated a catalyst (not shown) for promoting the chemical reaction of the reactant. That is, the guide groove 31 has both a function as a guide part that guides the flow direction of the reactant and a function as a catalyst storage part that stores the catalyst. Then, when the reactant is guided in the flow direction by the guide groove 31, the chemical reaction is promoted by contacting the catalyst.

  The chemical reaction furnace 10 is configured by connecting a plurality of outer shell bodies 11 and partition bodies 12 respectively. In this embodiment, the chemical reaction furnace 10 is formed by connecting two outer shell bodies 11 and a plurality of partition walls 12 respectively. The outer shell 11 is made of a reflective material that can reflect microwaves. Examples of the reflective material include metals such as iron, aluminum, and copper, and alloys such as stainless steel and duralumin. The partition wall 12 is made of a transmissive material that can transmit microwaves. Examples of the transmissive material include inorganic materials such as glass, and fired bodies such as ceramics, porcelain, and ceramics. The partition wall 12 is preferably formed of a self-heating material capable of self-heating by microwaves. This is because the reactant is heated not only by the microwave irradiation but also by the self-heating of the partition wall 12. Examples of the self-heating material include metal oxides such as magnesia, zirconia, and iron oxide, inorganic materials such as silicon carbide, mullite materials, silicon nitride materials, and alumina.

  In the chemical reaction furnace 10, the openings at both ends are closed by lid bodies 41. Of these lids 41, an incident hole 42 is formed through the center of the lid 41 on the other end side. An incident waveguide 43 is connected to a position corresponding to the incident hole 42 on the outer surface of the lid 41 on the other end side. A reflector 44 is attached to the inner surface of the lid 41 on one end side. The reflector 44 is formed in a conical shape from the reflective material.

  The incident hole 42, the incident waveguide 43, the reflector 44, and the like constitute an irradiation means. In this irradiating means, the incident waveguide 43 irradiates the inside of the partition wall body 12 through the incident hole 42 with a microwave output from a not-shown microwave oscillator (for example, a magnetron). The reflector 44 reflects the microwave that has reached one end of the chemical reaction furnace 10 to the inner surface of the partition wall 12. The microwave irradiated from the incident waveguide 43 or reflected by the reflector 44 passes through the partition wall 12 and reaches the reaction chamber 13 so that the reactant is irradiated. . In addition, the microwave which permeate | transmitted the reactive substance is comprised so that a reactive substance may be irradiated by reflecting with the outer shell body 11. FIG.

  A boiling sensor 51 constituting sound wave detecting means is attached to the outer shell body 11. The boiling sensor 51 detects boiling of the reactant in the reaction chamber 13. That is, the reactant may boil or bump when heated by microwave irradiation. In this way, when the reactant is boiled or bumped, the electric field of the microwave is concentrated on the boiling or bumped portion, the portion is locally heated, or arc discharge occurs, etc. The body 12 may be damaged. Therefore, the boiling sensor 51 is configured to detect the sound wave and pressure in the reaction chamber 13 to detect boiling.

  Specifically, the boiling sensor 51 includes a piezoelectric element that detects pressure and a microphone that detects sound waves. The piezo element detects an increase in impact pressure on the partition wall 12 due to boiling or bumping. The microphone detects a change in the magnitude or level of the flow sound of the reactant due to bubbles or vapor generated during boiling or bumping.

  The reflector 44 is provided with an optical sensor 52 that constitutes a light detection means. The optical sensor 52 detects light generated on the inner side of the partition body 12, that is, on the inner surface of the partition body 12 and the surface of the reflector 44. This light is generated when the partition wall 12 is locally heated or arc discharge is generated.

  The boiling sensor 51 and the optical sensor 52 are electrically connected to a control unit (not shown). This control unit constitutes a stopping means, and is electrically connected to the microwave oscillator. That is, detection results from the boiling sensor 51 and the optical sensor 52 are output to the control unit. The control unit is configured to output a stop signal to the microwave oscillator and stop the microwave irradiation when the boiling of the reactant, arc discharge, or the like is detected from these detection results.

  In order to increase the limit value for the boiling of the reactant, it is preferable that the reactant is circulated so as to have a turbulent boundary layer. When the circulation having the turbulent boundary layer is evaluated by the Reynolds number, the Reynolds number is 2000 or more. In the chemical reaction furnace 10, the reactant is circulated through the guide groove 31 so that the Reynolds number is 2000 or more.

  In the chemical reaction furnace 10, one outer shell body 11, a partition wall body 12, and a reactant present therebetween constitute one module 60. In this embodiment, the chemical reaction furnace 10 is composed of two modules 60. And between each module 60, the substantially plate-shaped partition material 53 is interposed. The partition member 53 is formed of the transmissive material so as not to shield the microwaves irradiated on the inner side of the partition body 12. In addition, the partition material 53 partitions the reaction chamber 13 for each module 60, and the chemical reaction furnace 10 has a plurality of reaction chambers 13.

The module 60 functions as a waveguide that transmits microwaves. In this embodiment, the module 60 functions as a resonance tube type waveguide that transmits only the fundamental mode (TE ₁₁ ) microwaves. And the module 60 is suitably irradiated to the partition body 12 of each module 60 by transmitting between each module 60, making a microwave resonate, without attenuating or losing.

  When the module 60 is to function as a resonant tube type waveguide, the dimension and shape of the chemical reaction furnace 10 are set in consideration of the attenuation of microwaves by the reactant. In this setting, the frequency and wavelength of the microwave, the dielectric constant and dielectric loss coefficient of the reactant, the dielectric constant and dielectric loss factor of the partition 12, the amount of reactant treated, the processing speed and the temperature are the basis. It is assumed that In the chemical reaction furnace 10, microwaves are radiated into a space of a finite length having a three-layer cross section composed of an outer shell body 11, a reactant and a partition body 12. In general, the dimensional shape of the chemical reaction furnace 10 is set by numerical analysis of Maxwell's electromagnetic wave equation using the three-layer structure as a boundary condition.

  Here, since the reactant is excellent in microwave absorption, the chemical reactor 10 is attenuated until the electromagnetic field is substantially zero on the outer surface of the outer shell 11. Can be assumed. Therefore, in the chemical reaction furnace 10, it is possible to perform a schematic design by using the solution of the wave radiated to free space.

Wave propagation takes the form of F (X) × exp (−Ki × X) × Sin (ωt + Kr × X). Is the angular frequency, Kr is the real part of the wave vector, Ki is the imaginary part of the wave vector, and X is the position vector. Actually, it is not a free space but a space where the cylindrical outer shell 11 and the reactant exist, but if it is a fundamental mode (TE ₁₁ ) microwave, the real part of the wave vector, that is, the propagation The direction and wavelength do not change significantly. Therefore, the attenuation of the microwave energy is determined by the imaginary part of the wave vector. The length of the chemical reactor 10 is set such that the imaginary part of the wave vector is an approximate value of 1 / e.

Specifically, in the chemical reaction furnace 10, the flow rate of the reactant is 5 to 50 L / min, and the maximum pressure at the time of introduction is 10 kg / cm ² (0.98 MPa). The microwave has an intensity of 1.5 kW and 2.45 GHz. The outer shell 11 has a dimensional shape having an inner diameter of 225 mm in diameter and a length of 440 mm. The partition body 12 has a dimension and shape in which the inner diameter is 90 mm in diameter and the length is 440 mm. The height of the reaction chamber 13 is (225−90) ÷ 2 and is 67.5 mm. The total length of the chemical reaction furnace 10 is 941 mm. At this time, the reflectance of the microwave in the reflector 44 is 2% or less.

  Note that the height of the reaction chamber 13 is preferably equal to or less than the penetration depth of the microwave with respect to the reactant. This penetration depth refers to the depth at which microwaves can reach from the surface of the reactant to the inside. In addition, this penetration depth is a numerical value which changes according to the frequency or temperature of a microwave. For example, when the reactant contains water, the penetration depth of the microwave of 2.45 GHz with respect to water at room temperature is 1 cm. Therefore, when the reactant contains water, the height of the reaction chamber 13 is preferably 1 cm or less.

Next, the operation of the chemical reaction furnace 10 will be described below.
In the chemical reaction furnace 10, the microwave is irradiated from the incident waveguide 43 to the inside of the partition body 12. Only the fundamental mode (TE ₁₁ ) is transmitted by the microwave resonating in the module 60 composed of the reactants in the outer shell body 11, the partition body 12 and the reaction chamber 13. Then, the microwave in the basic mode (TE ₁₁ ) passes through the partition wall 12 and is irradiated to the reactant in the reaction chamber 13. The reactant is heated by absorbing the irradiated microwave to promote a chemical reaction. Microwaves that are not absorbed by the reactant but are transmitted through the reactant are reflected by the inner surface of the outer shell 11 and are irradiated and absorbed again. In addition, the microwave that has passed through the reactant again passes through the partition wall 12, then passes through the partition 12 on the opposite side of the partition 12 and is absorbed by the reactant. Further, the microwave that reaches the inside of the chemical reaction furnace 10 is reflected by the reflector 44 to the inside of the partition wall 12 and is absorbed by the reactant in the same manner as described above. Therefore, the microwave does not leak from the inside of the chemical reaction furnace 10 to the outside, and almost all is absorbed by the reactant.

The effects exhibited by the above embodiment will be described below.
-According to the chemical reaction furnace 10 of the embodiment, the microwave irradiated to the inside of the partition wall 12 does not leak from the inside of the chemical reaction furnace 10 to the outside, and almost all is absorbed by the reactant. In addition, the chemical reaction furnace 10 is sized and shaped so that each module 60 functions as a waveguide in consideration of microwave attenuation due to the reactant. Accordingly, a part of the microwave is surely transmitted through the reactant, and the chemical reaction is not promoted only on the surface of the reactant. For this reason, the reaction rate can be improved.

-In addition, since the attenuation of microwaves due to the reactants is taken into account, the influence on the microwave irradiation amount due to the increase or decrease in the processing amount can be almost eliminated.
In addition, when the partition wall 12 is formed of a ceramic material that is a transmissive material, the ceramic material has a property that it is resistant to compressive stress and weak to tensile stress. When the reactant is circulated inside the ceramic partition wall 12 as in the conventional example, if the internal pressure increases due to bumping, boiling, etc. of the reactant, a tensile stress is applied to the inner surface of the partition wall 12 by the internal pressure. The partition wall 12 may be damaged. However, according to the chemical reaction furnace 10, since the reactant flows on the outer surface of the partition wall 12, the stress applied to the partition wall 12 due to bumping, boiling or the like becomes a compressive stress. Therefore, damage to the partition wall 12 can be suppressed.

  The reaction material is circulated in the axial direction so as to form a spiral along the peripheral surface of the outer shell 11 by the guide groove 31 provided in the inner surface of the outer shell 11. Further, a catalyst is accommodated inside the guide groove 31, and when the reactant contacts the guide groove 31, a chemical reaction is promoted by the catalyst. Therefore, the chemical reaction of the reactant can be promoted uniformly.

  The chemical reaction furnace 10 is configured to quickly stop microwave irradiation when the boiling sensor 51 and the optical sensor 52 detect an abnormality. Therefore, the reactant can be stably heated.

In addition, by configuring each module 60 to function as a resonant waveguide, attenuation or loss of the microwave can be suppressed.
In addition, the chemical reaction furnace 10 can include two reaction chambers 13 to improve processing efficiency.

In addition, this embodiment can also be changed and embodied as follows.
As shown in FIG. 2, each module 60 constituting the chemical reaction furnace 10 has a microwave wavelength under a vacuum condition as a reference wavelength, and transmits a microwave having a wavelength twice or more of the reference wavelength. It may function as a wave tube. The chemical reaction furnace 10 shown in FIG. 2 differs from the chemical reaction furnace 10 shown in FIG. Specifically, the flow rate of the reactant is 300 L / min, and the maximum pressure at the time of introduction is 10 kg / cm ² (0.98 MPa). The microwave has an intensity of 200 kW and 84 GHz. The outer shell 11 has a dimensional shape having an inner diameter of 225 mm in diameter and a length of 212.5 mm. The size and shape of the partition wall 12 are 190 mm in inner diameter and 212.5 mm in length. The height of the reaction chamber 13 is (225-190) / 2 and is 17.5 mm. The total length of the chemical reaction furnace 10 is 486.1 mm. At this time, the reflectance of the microwave in the reflector 44 is 0.3% or less. And according to the said structure, each module 60 functions as a nonresonant-type waveguide, and it becomes possible to transmit the microwave of a higher mode suitably. When a higher-order mode microwave is used, the microwave can be widely scattered over the entire inner surface of the partition wall 12.

Instead of the reflector 44, a stirrer fan having a plurality of blades formed of a reflective material may be used.
The chemical reaction furnace 10 may be configured to include one large reaction chamber 13 by omitting the partition material 53 and communicating the reaction chambers 13 of the modules 60 with each other.

  In the embodiment, the chemical reaction furnace 10 is configured by connecting two modules 60, but the chemical reaction furnace 10 may be configured by only one module 60. When the chemical reaction furnace 10 is constituted by one module 60, the incident waveguide 43 is connected to the other end of the module 60, and the reflector 44 is attached to one end. Further, the chemical reaction furnace 10 may be configured by connecting three or more modules 60. When the chemical reaction furnace 10 is composed of three or more modules 60, the incident waveguide 43 is connected to the module 60 located at the other end of the chemical reaction furnace 10, and the module located at one end of the chemical reaction furnace 10. A reflector 44 is attached to 60.

The module 60 does not necessarily have a function as a waveguide, and may be configured not to transmit microwaves between the modules 60.
The boiling sensor 51 may be configured with only a microphone and may detect only sound waves. In addition, the boiling sensor 51 may be provided on the partition body 12 as long as the boiling of the reactant can be detected.

The optical sensor 52 may be omitted. Alternatively, the optical sensor 52 may be provided on the inner surface of the partition body 12, the inner surface of the outer shell body 11, or the like.
The catalyst is not limited to be accommodated in the guide groove 31, and a catalyst accommodating portion may be provided in the reaction chamber 13 on the reactant flow path separately from the guide groove 31. For example, the catalyst may be accommodated inside the mesh body and disposed in the reaction chamber 13.

  The guide groove 31 is not limited to being provided on the inner surface of the outer shell body 11 and may be provided on the outer surface of the partition wall body 12. Further, the guide portion is not limited to the guide groove 31 and may extend in the axial direction of the outer shell body 11 or the partition body 12 or may be formed by a protrusion or the like.

Sectional drawing which shows the chemical reactor of embodiment. Sectional drawing which shows the chemical reaction furnace of another form.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Chemical reaction furnace, 11 ... Outer shell body, 12 ... Partition body, 13 ... Reaction chamber, 22 ... Introduction path, 24 ... Discharge path, 31 ... Guide groove as guide part, 43 ... Incident guide which comprises irradiation means Waveguide 44... Reflector constituting irradiation means 51. Boiling sensor constituting sound wave detection means 52. Light sensor constituting light detection means.

Claims (7)

A chemical reaction furnace for irradiating a reactant containing at least one of gas, liquid and powder with microwaves to promote a chemical reaction of the reactant,
A cylindrical outer shell and a cylindrical partition housed inside the outer shell, the reaction chamber having a space formed between the outer shell and the partition as a reaction chamber The partition body is formed of a permeable material that transmits microwaves, and irradiation means for irradiating microwaves is disposed inside the partition body, and the partition body is separated from the irradiation means. Configured to irradiate the reactant with microwaves ,
The outer shell body or the partition body is provided with an introduction path and a discharge path communicating with the reaction chamber, and the reactant is discharged from the discharge path while introducing the reactant from the introduction path, While allowing the reactants to flow in the reaction chamber, the inner surface of the outer shell body or the outer surface of the partition wall body is provided with a guide portion made of a groove or a ridge extending in a spiral or parallel to the axial direction, A chemical reaction furnace characterized by guiding the flow direction of reactants in a certain direction . 2. The chemical reaction furnace according to claim 1 , wherein a catalyst housing portion that houses a catalyst that promotes a chemical reaction of the reactant is provided on an inner surface of the outer shell body or an outer surface of the partition body . A light detection means for detecting light generated inside the partition body or inside the reaction chamber, and a stop means for stopping the irradiation of microwaves according to the detection result by the light detection means , The chemical reactor according to claim 1 or 2. The sound wave detection means for detecting the sound wave generated inside the reaction chamber and the stop means for stopping the irradiation of the microwave according to the detection result by the sound wave detection means are provided. Item 4. The chemical reactor according to any one of Items 3 to 4. As the waveguide that transmits the microwave by the outer shell, the partition wall, and the reactant, the waveguide transmits only the fundamental mode microwave. The chemical reactor according to any one of claims 1 to 4. The outer shell body, the partition wall body and the reactive substance constitute a waveguide for transmitting the microwave, and the wavelength of the microwave under a vacuum condition is a reference wavelength, and the waveguide has the reference wavelength. The chemical reactor according to any one of claims 1 to 4 , wherein a microwave having a wavelength twice or more of the above is transmitted . A partition material is provided between the outer shell body and the partition wall, the reaction chamber is partitioned into a plurality of reaction chambers by the partition material, and the partition material is formed of a permeable material that transmits microwaves. chemical reactor as claimed in any one of claims 6, wherein.

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