CN216778786U - Circular array type microwave chemical reaction device - Google Patents
Circular array type microwave chemical reaction device Download PDFInfo
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- CN216778786U CN216778786U CN202220020897.4U CN202220020897U CN216778786U CN 216778786 U CN216778786 U CN 216778786U CN 202220020897 U CN202220020897 U CN 202220020897U CN 216778786 U CN216778786 U CN 216778786U
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Abstract
The utility model provides a surrounding array type microwave chemical reaction device which can improve the microwave heating uniformity and further improve the accuracy and the reaction efficiency of chemical reaction. The surrounding array type microwave chemical reaction device comprises a shell and a reactor, wherein an annular microwave excitation area is formed between a microwave resonant cavity and the shell, and a plurality of microwave feed ports are distributed on the circumferential side surface of the microwave resonant cavity; a cut-off waveguide tube is arranged on the microwave leakage-proof upper cover component; the material port of the reaction vessel extends out of the shell through the cut-off waveguide tube. According to the surrounding array type microwave chemical reaction device, microwaves enter the microwave excitation area from the microwave inlet on the shell and then enter the microwave resonant cavity through the plurality of microwave feed ports of the annular array, and surrounding microwave energy distribution is formed in the microwave resonant cavity, so that the power density and the central focusing process effect of the microwaves are obviously improved, the uniformity and consistency of microwave heating are greatly improved, and the accuracy and the reaction efficiency of chemical reaction are effectively improved.
Description
Technical Field
The utility model belongs to the field of chemical reaction, and particularly relates to a surrounding array type microwave chemical reaction device.
Background
In the microwave environment, the inside and the outside of the material are heated simultaneously, the temperature field is uniform, and the energy utilization rate is high. Simultaneously, microwave heating has many advantages that traditional heating methods do not possess: selective heating, uniform and rapid temperature rise, high heating efficiency, easy instantaneous heating control, no pollution and the like, wherein the most outstanding advantages are short time and low energy consumption. Therefore, microwave has been widely used in chemical processing techniques such as chemical synthesis, extraction, digestion, etc., as a highly efficient and novel energy source.
In the prior art, a microwave chemical reaction apparatus generally comprises a microwave reaction chamber and a reaction container arranged in the microwave reaction chamber, wherein the microwave reaction chamber is limited by size, and generally only one microwave feed port can be arranged on a single microwave source, and therefore microwaves are fed into the microwave reaction chamber. According to the existing microwave chemical reaction device with the structure, because the microwave feed ports are small in number and fixed, microwaves can only be radiated to the position of the reactor from a high-energy area of the feed ports, the microwave density obtained at the position close to the feed ports is higher than that at other positions, a microwave energy field in a surrounding type three-dimensional mode cannot be formed, microwave heating is not uniform, even material mixing modes such as stirring and the like can be adopted, and the uniformity of multiple experiments cannot be ensured. For example, the same reaction vessel is used for carrying out multiple reactions, the liquid sample amount is different in each reaction, transmission is easily formed for liquid with a small sample amount, microwave is easily absorbed and cannot be transmitted for liquid with a large sample, point type energy transmission brought by the structure of a single feed port causes uneven microwave heating, and great influence is brought to the accuracy of the chemical reaction.
SUMMERY OF THE UTILITY MODEL
The utility model provides a surrounding array type microwave chemical reaction device which can improve the microwave heating uniformity and further improve the accuracy and the reaction efficiency of chemical reaction.
In order to achieve the technical purpose, the utility model adopts the following technical scheme to realize: a wrap-around array microwave chemical reaction apparatus, comprising:
the microwave oven comprises a shell, a microwave oven body and a microwave oven cover, wherein the shell is made of metal and is of a hollow cylindrical structure and comprises a top plate, a bottom plate and circumferential side plates, the top plate is provided with a mounting hole, and the shell is provided with a microwave inlet;
the reactor comprises a microwave resonant cavity, a microwave anti-leakage upper cover assembly and a reaction container; the microwave resonant cavity is of a cylindrical structure, is positioned in the shell and forms an annular microwave excitation area with the circumferential side plate of the shell, and a plurality of microwave feed ports are distributed on the circumferential side surface of the microwave resonant cavity along the circumferential direction; the microwave leakage-proof upper cover component is arranged on the top plate of the shell and is positioned at the top end of the microwave resonant cavity, the microwave leakage-proof upper cover component is in sealing fit with the mounting hole and the microwave resonant cavity, and a cut-off waveguide tube is arranged on the microwave leakage-proof upper cover component; and a material port of the reaction container extends out of the shell through the cut-off waveguide tube.
The microwave feed port is in a long strip shape, and the length direction of the microwave feed port is parallel to the axial direction of the microwave resonant cavity.
The microwave feed port is in a strip shape, and the length direction of the microwave feed port is inclined relative to the axial direction of the microwave resonant cavity.
In the circumferential direction of the microwave resonant cavity, the inclination directions of two adjacent microwave feed ports are opposite.
The microwave feed port is in a long strip shape, and the length direction of the microwave feed port is perpendicular to the axial direction of the microwave resonant cavity.
The microwave leakage-proof upper cover assembly comprises an upper cover body and a lower cover body located below the upper cover body, wherein the stop waveguide is arranged on the upper cover body, the lower cover body is annular, the lower cover body is fixedly connected with a top plate of the shell, and the upper cover body is detachably and fixedly connected with the lower cover body.
The lower-layer cover body is provided with a cylindrical part, and the cylindrical part extends into the shell through the mounting hole and is in sealing fit with the microwave resonant cavity.
And a positioning groove is formed on the inner wall of the cylindrical part, and the top end of the microwave resonant cavity is positioned in the positioning groove in a matching manner.
The shell is provided with a process hole.
The reaction vessel is a test tube, a flask or a coil.
Compared with the prior art, the utility model has the following advantages and positive effects:
the utility model relates to a surrounding array type microwave chemical reaction device, wherein a microwave resonant cavity is positioned in a shell, an annular microwave excitation area is formed between the microwave resonant cavity and the shell, a plurality of microwave feed ports are distributed on the circumferential side surface of the microwave resonant cavity along the circumferential direction, namely, the plurality of microwave feed ports are distributed on the microwave resonant cavity in a surrounding array type, microwaves enter the microwave excitation area from a microwave inlet on the shell and enter the microwave resonant cavity through the plurality of microwave feed ports on the annular array, and a surrounding array type microwave energy distribution is formed in the microwave resonant cavity, so that the surrounding array type microwave energy distribution is formed, the power density and the central focusing process effect of the microwaves are obviously improved, the uniformity and the consistency of microwave heating are greatly improved, and the accuracy and the reaction efficiency of chemical reaction are effectively improved.
Drawings
FIG. 1 is a schematic structural diagram of a circular array type microwave chemical reaction apparatus according to the present invention;
FIG. 2 is a perspective view of a first embodiment of a microwave cavity of a surround array type microwave chemical reaction apparatus according to the present invention;
FIG. 3 is a perspective view of a second embodiment of a microwave cavity of a surround array type microwave chemical reaction apparatus according to the present invention;
FIG. 4 is a perspective view of a third embodiment of a microwave cavity of a surround array type microwave chemical reaction apparatus according to the present invention;
reference numerals: 100. a housing; 110. a microwave inlet; 120. a top plate; 121. mounting holes; 130. a base plate; 140. a circumferential side plate; 200. a reactor; 210. a microwave resonant cavity; 211. feeding a microwave port; 212. a base plate; 220. a microwave leakage-proof upper cover assembly; 221. cutting off the waveguide; 222. an upper cover body; 223. a lower layer cover body; 224. a cylindrical portion; 225. positioning a groove; 230. a reaction vessel; 231. a material port; 240. and a microwave excitation area.
Detailed Description
The technical solution of the present invention will be described in further detail with reference to the accompanying drawings and the detailed description.
Referring to fig. 1 and 2, the present embodiment is a surround array type microwave chemical reaction apparatus including a housing 100 and a reactor 200.
The casing 100 is made of a metal material, and has a hollow cylindrical structure, and includes a top plate 120, a bottom plate 130, and a circumferential side plate 140, the top plate 120, the bottom plate 130, and the circumferential side plate 140 enclose an inner cavity of the casing 100, the top plate 120 is provided with a mounting hole 121, the casing 100 is provided with a microwave inlet 110, in this embodiment, the microwave inlet is provided on the circumferential side plate 140, and of course, it may also be provided on the top plate 120 or the bottom plate 130, which is not limited to this.
The reactor 200 includes a microwave cavity 210, a microwave leakage-proof upper cover assembly 220, and a reaction vessel 230; the microwave resonant cavity 210 is a cylindrical structure, is located inside the casing 100, and forms an annular microwave excitation area 240 with the circumferential side plate 140 of the casing 100, and a plurality of microwave feed ports 211 are circumferentially distributed on the circumferential side surface of the microwave resonant cavity 210; the microwave leakage-proof upper cover assembly 220 is installed on the top plate 120 of the casing 100 and located at the top end of the microwave resonant cavity 210, the microwave leakage-proof upper cover assembly 220 is in sealing fit with the installation hole 121 and the microwave resonant cavity 210 to prevent microwave leakage, meanwhile, the microwave leakage-proof upper cover assembly 220 is provided with the cut-off waveguide tube 221, the cut-off waveguide tube 221 is high-impedance to microwave frequency and plays a role in electromagnetic shielding, microwaves cannot pass through, the material port 231 of the reaction container 230 can be allowed to pass through while microwave leakage is effectively prevented, namely, the material port 231 of the reaction container 230 extends out of the casing 100 through the cut-off waveguide tube 221 so as to facilitate feeding and/or discharging.
In the present embodiment, the microwave cavity 210 is located inside the housing 100, and forms a ring-shaped microwave excitation area 240 with the casing 100, a plurality of microwave feed ports 211 are circumferentially arranged on the circumferential side surface of the microwave resonant cavity 210, that is, a plurality of microwave feed ports 211 are distributed on the microwave cavity 210 in a circular array, after the microwaves generated by the microwave source enter the microwave excitation area 240 from the microwave inlet 110 on the housing 100, enters the microwave cavity 210 through a plurality of microwave feed ports 211 of the annular array, forms a circular microwave energy distribution inside the microwave cavity 210, the surrounding heating of the reaction vessel 230 not only significantly improves the power density of the microwave and the process effect of central focusing, and the uniformity and consistency of microwave heating are greatly improved, and the accuracy and the reaction efficiency of chemical reaction are effectively improved. The internal cavity space of the microwave cavity 210 has different volumes, for example, a small-volume microwave cavity 210 can be formed into a single-mode microwave cavity after microwave is fed in, and a large-volume microwave cavity 210 can be formed into a multi-mode microwave cavity, preferably a single-mode microwave cavity, after microwave is fed in, and the density of the highly focused microwave energy field can ensure the uniformity of microwave heating and the uniformity and reproducibility of experiments.
As shown in fig. 2, in the present embodiment, the microwave feed port 211 is an elongated shape, and the length direction thereof is parallel to the axial direction of the microwave resonant cavity 210.
As shown in fig. 1, the microwave leakage-proof upper cover assembly 220 includes an upper cover 222 and a lower cover 223 located below the upper cover 222, the cut-off waveguide 221 is disposed on the upper cover 222, the lower cover 223 is ring-shaped, the lower cover 223 is fixedly connected to the top plate 120 of the casing 100, and the upper cover 222 is detachably connected to the lower cover 223. Then, only by detaching the upper cover 222, it is possible to replace a different reaction vessel 230, and further increase the diversity of the microwave chemical reaction, for example, the reaction vessel 230 may be a flask or a coil pipe, in addition to the test tube shown in fig. 1. An airtight structure and a microwave sealing structure (e.g., a microwave choke groove) may be disposed at a contact surface between the upper cover 222 and the lower cover 223 to realize airtight sealing and microwave leakage prevention, and similarly, an airtight structure and a microwave sealing structure (e.g., a microwave choke groove) may be disposed at a contact surface between the lower cover 223 and the top surface of the top plate 120 of the case 100 to further improve airtight sealing and microwave leakage prevention.
Further, the lower cover 223 has a cylindrical portion 224, and the cylindrical portion 224 extends into the housing 100 through the mounting hole 121 and is in sealing engagement with the microwave cavity 210. That is, the cylindrical portion 224 extends toward the side of the microwave cavity 210, so as to facilitate a sealing fit with the microwave cavity 210, so that the microwave in the microwave excitation region 240 can only enter the microwave cavity 210 through the microwave feed port 211 as much as possible, thereby further preventing the microwave from leaking.
Further, a positioning groove 225 is formed on the inner wall of the cylindrical portion 224, and the top end of the microwave cavity 210 is fitted and positioned in the positioning groove 225.
Specifically, the positioning groove 225 is an inverted L-shaped groove, the top end of the microwave resonant cavity 210 is clamped in the positioning groove 225, the outer wall of the top end of the microwave resonant cavity is attached to the circumferential groove wall of the positioning groove 225, and the top wall of the microwave resonant cavity abuts against the top wall of the positioning groove 225, so that positioning is achieved.
In order to monitor the temperature in the microwave cavity 210, a temperature measuring hole (not shown) may be formed in the housing 100, and a thermocouple may be inserted for temperature monitoring. Of course, other process holes, such as mounting holes, lighting holes, video observation holes, etc., may be provided according to specific process requirements, and the process holes may be provided on the bottom plate 130, the top plate 120 or the circumferential side plate 140 of the casing 100, which is not particularly limited.
Referring to fig. 3, as a second embodiment of the present invention, in this embodiment, the microwave feed port 211 is still long, but the length direction thereof is inclined with respect to the axial direction of the microwave cavity 210.
Further, the inclination directions of two adjacent microwave feed ports 211 are opposite in the circumferential direction of the microwave resonant cavity 320, so that the microwaves in multiple directions can be received.
Referring to fig. 4, as a third embodiment of the present invention, in this embodiment, the microwave feed port 211 is still an elongated shape, and the length direction thereof is perpendicular to the axial direction of the microwave resonant cavity 210.
The above examples are only intended to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for some of the features thereof; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (10)
1. A surround array microwave chemical reaction apparatus, comprising:
the microwave oven comprises a shell, a microwave oven body and a microwave oven cover, wherein the shell is made of metal and is of a hollow cylindrical structure and comprises a top plate, a bottom plate and circumferential side plates, the top plate is provided with a mounting hole, and the shell is provided with a microwave inlet;
the reactor comprises a microwave resonant cavity, a microwave anti-leakage upper cover assembly and a reaction container; the microwave resonant cavity is of a cylindrical structure, is positioned in the shell and forms an annular microwave excitation area with the circumferential side plate of the shell, and a plurality of microwave feed ports are distributed on the circumferential side surface of the microwave resonant cavity along the circumferential direction; the microwave leakage-proof upper cover component is arranged on the top plate of the shell and is positioned at the top end of the microwave resonant cavity, the microwave leakage-proof upper cover component is in sealing fit with the mounting hole and the microwave resonant cavity, and a stop waveguide tube is arranged on the microwave leakage-proof upper cover component; and a material port of the reaction container extends out of the shell through the cut-off waveguide tube.
2. The surround array type microwave chemical reaction apparatus according to claim 1,
the microwave feed port is in a long strip shape, and the length direction of the microwave feed port is parallel to the axial direction of the microwave resonant cavity.
3. The surround array type microwave chemical reaction apparatus according to claim 1,
the microwave feed port is in a strip shape, and the length direction of the microwave feed port is inclined relative to the axial direction of the microwave resonant cavity.
4. The surround array type microwave chemical reaction apparatus according to claim 3,
in the circumferential direction of the microwave resonant cavity, the inclination directions of two adjacent microwave feed ports are opposite.
5. The surround array type microwave chemical reaction apparatus according to claim 1,
the microwave feed port is in a long strip shape, and the length direction of the microwave feed port is perpendicular to the axial direction of the microwave resonant cavity.
6. The surround array type microwave chemical reaction apparatus according to claim 1,
the microwave leakage-proof upper cover assembly comprises an upper cover body and a lower cover body located below the upper cover body, wherein the stop waveguide is arranged on the upper cover body, the lower cover body is annular, the lower cover body is fixedly connected with a top plate of the shell, and the upper cover body is detachably and fixedly connected with the lower cover body.
7. The surround array type microwave chemical reaction apparatus according to claim 6,
the lower-layer cover body is provided with a cylindrical part, and the cylindrical part extends into the shell through the mounting hole and is in sealing fit with the microwave resonant cavity.
8. The surround array type microwave chemical reaction apparatus according to claim 7,
and a positioning groove is formed on the inner wall of the cylindrical part, and the top end of the microwave resonant cavity is positioned in the positioning groove in a matching manner.
9. The surround array type microwave chemical reaction apparatus according to claim 1,
the shell is provided with a process hole.
10. The surround array type microwave chemical reaction apparatus according to claim 1,
the reaction vessel is a test tube, a flask or a coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220020897.4U CN216778786U (en) | 2022-01-06 | 2022-01-06 | Circular array type microwave chemical reaction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220020897.4U CN216778786U (en) | 2022-01-06 | 2022-01-06 | Circular array type microwave chemical reaction device |
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| Publication Number | Publication Date |
|---|---|
| CN216778786U true CN216778786U (en) | 2022-06-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220020897.4U Active CN216778786U (en) | 2022-01-06 | 2022-01-06 | Circular array type microwave chemical reaction device |
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| CN (1) | CN216778786U (en) |
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