Annular focusing single-mode microwave photo-thermal reaction system based on double-temperature one-image temperature measurement

Abstract

The utility model discloses an annular focusing single-mode microwave photo-thermal reaction system based on double-temperature one-image temperature measurement, which comprises a gas supply unit, a synthetic reaction unit and a reactant analysis unit which are connected in sequence, and a temperature measurement unit is mounted on the synthetic reaction unit; the synthesis reaction unit comprises an annular single-mode microwave synthesis reactor and a quartz reactor, and the annular single-mode microwave synthesis reactor provides heat for a catalytic reforming area in the quartz reactor; according to the utility model, the infrared thermometer is used for measuring the surface temperature of the catalyst, and the thermal imaging high-speed camera is coupled to accurately measure the overall temperature gradient of the catalyst and observe the hot spot effect and the plasma effect in the microwave reaction. Meanwhile, an annular single-mode microwave synthesis reactor is adopted to replace a traditional standing wave single-mode device, and the microwave energy coupling precision and uniformity are enhanced, so that the conversion rate of large-scale reaction is improved, and repeatability and stability are kept. The catalyst can be widely applied to the field of catalytic reforming of tar, and has an ideal application prospect.

Description

TECHNICAL FIELD

[0001] The utility model relates to tar catalytic reforming reaction device technical field, concretely relates to a kind of annular focusing single-mode microwave photo-thermal reaction system based on double temperature one image temperature measurement. BACKGROUND

[0002] Current energy is mainly fossil energy, and biomass is the fourth largest energy besides coal, oil and natural gas, with the characteristics of wide distribution, renewable, high hydrogen content and environmental friendly, so biomass has great potential to replace traditional fossil energy. However, tar, as one of the main by-products of biomass gasification process, has problems such as difficult combustion, easy blockage of equipment pipeline, damage to gas equipment and harm to human health, which is the biggest obstacle to large-scale industrial application of biomass gasification technology.

[0003] Therefore, how to handle tar has become a key link for efficient large-scale utilization of biomass. In order to solve the problem of tar, scholars in various countries have tried to study a large number of methods, among which catalytic cracking method is widely studied and concerned due to its good properties. Compared with traditional thermal catalytic reforming, microwave catalytic reforming has the advantages of immediacy, integrity, selectivity and non-contact, and the hot spot effect and plasma effect induced by microwave heating can also promote the progress of catalytic reforming reaction.

[0004] The traditional microwave reaction system has limitations in temperature measurement and reaction equipment. The tip of the thermocouple commonly used in experiments has metal, and the metal will have a discharge phenomenon in the microwave field, so the thermocouple cannot be used for temperature measurement during the reaction. The common microwave reaction equipment on the market uses a single infrared temperature measuring instrument for temperature measurement, and the temperature measured by the infrared temperature measuring instrument is the surface temperature of the reactor, so the data obtained cannot effectively represent the true temperature of the catalyst in the experiment. In addition, the conventional microwave reaction equipment usually uses a traditional one-way standing single-mode microwave synthesis reactor, which has a small microwave cavity volume and is prone to coupling position repulsion, affecting the consistency of single-mode reaction. At the same time, the magnetron power is small, which leads to uneven reaction and easily causes experimental failure. UTILITY MODEL CONTENT

[0005] The utility model aims to provide a kind of annular focusing single-mode microwave photo-thermal reaction system based on double temperature one image temperature measurement, which can promote the progress of reaction research, accurately measure the overall temperature gradient of catalyst, and observe the experimental phenomena in microwave reaction by structural design of microwave reaction system.

[0006] In order to achieve the above purpose, the utility model is realized by the following technical scheme:

[0007] The utility model discloses an embodiment of first aspect provides a kind of annular focusing single-mode microwave photo-thermal reaction system based on double-temperature one image temperature measurement, including gas supply unit, synthetic reaction unit and reactant analysis unit connected in sequence, temperature measurement unit is installed on the synthetic reaction unit;The synthetic reaction unit includes annular single-mode microwave synthetic reactor and quartz reactor, and the annular single-mode microwave synthetic reactor provides heat for catalytic reforming zone in quartz reactor;

[0008] The temperature measurement unit includes a first infrared temperature measurement probe, a second infrared temperature measurement probe, and a thermal imaging high-speed camera. The first and second infrared temperature measurement probes measure the surface temperature of the catalyst in the quartz reactor, and the thermal imaging high-speed camera measures the overall temperature gradient of the catalyst.

[0009] As a further technical solution, the gas supply unit includes a CO2 cylinder, an inert gas cylinder, and a tar evaporator. The gas supply unit is connected to a gas mixer through a four-way valve, and the gas mixer is connected to the bottom of the quartz reactor through a pipeline.

[0010] As a further technical solution, the quartz reactor is arranged inside the annular single-mode microwave synthetic reactor and located at the center position of the annular single-mode microwave synthetic reactor.

[0011] As a further technical solution, a conical head is provided at the top of the quartz reactor, and the side of the conical head has a gas outlet hole. The gas outlet hole is connected to the reactant analysis unit through a pipeline, and the conical head is connected to the annular single-mode microwave synthetic reactor, with a sealing gasket provided at the connection.

[0012] As a further technical solution, a detection hole is provided directly above the conical head, and a first infrared temperature measurement probe is installed at the detection hole. The first infrared temperature measurement probe is directed towards the catalyst inside the quartz reactor.

[0013] As a further technical solution, a second infrared temperature measurement probe is installed on the side wall of the annular single-mode microwave synthetic reactor. The second infrared temperature measurement probe is directed towards the catalyst inside the quartz reactor.

[0014] As a further technical solution, a transparent observation window is provided on the side wall of the annular single-mode microwave synthetic reactor. A thermal imaging high-speed camera is placed outside the transparent observation window, and the thermal imaging high-speed camera is directed towards the catalyst inside the quartz reactor.

[0015] As a further technical solution, a quartz sieve plate is provided inside the quartz reactor. A thin layer of quartz wool is laid on the quartz sieve plate, and the catalyst is placed on the thin layer of quartz wool.

[0016] As a further technical scheme, the reagent analysis unit comprises, in sequence, a condensing device, a gas bag and a gas chromatograph detector.

[0017] As a further technical scheme, the annular single-mode microwave synthesis reactor is provided with a microwave power controller.

[0018] The beneficial effects of the above embodiments of the utility model are as follows:

[0019] (1) The utility model discloses a two infrared temperature measuring instruments and thermal imaging height video camera are set up, and the infrared temperature measuring instrument is used to measure the surface temperature of catalyst, and the high-speed video camera is coupled on the side of microwave reactor, accurately measures the overall temperature gradient of catalyst, and the hot spot effect, plasma effect are provided from multiple dimensions The temperature distribution of system can promote the progress of reaction research, accurately measure the overall temperature gradient of catalyst, and observe the experimental phenomena appearing in microwave reaction.

[0020] (2) The utility model discloses an annular single-mode microwave synthesis reactor instead of traditional standing single-mode device, adopts annular single-mode multi-channel focusing radiation, improves energy coupling uniformity, is not influenced by the volume size and polarity change of reagent, improves the conversion rate of large-scale reaction, ensures the repeatability and reproducibility of reaction condition and result when volume changes. BRIEF DESCRIPTION OF DRAWINGS

[0021] The drawings accompanying the specification of the utility model form part of the utility model and serve to further provide an understanding of the utility model, and the illustrative embodiments of the utility model and the description thereof serve to explain the utility model and do not constitute an improper limitation on the utility model.

[0022] Figure 1 It is the schematic diagram of the annular focusing single-mode microwave photo-thermal reaction system based on double-temperature one-image temperature measurement of the utility model;

[0023] Figure 2 It is the internal structure schematic diagram of the synthesis reaction unit of the utility model.

[0024] The schematic diagram is only used for illustration;

[0025] Among them, 1, CO2 gas cylinder;2, inert gas cylinder;3, tar evaporator;4, gas flowmeter;5, four-way valve;6, gas mixer;7, first infrared temperature measuring probe;8, microwave power controller;9, conical head;10, second infrared temperature measuring probe;11, annular single-mode microwave synthesis reactor;12, transparent observation window;13, thermal imaging high-speed video camera;14, condensing device;15, gas bag;16, gas chromatograph detector;17, sealing washer;18, catalytic reforming zone;19, quartz reactor;20, quartz sieve plate. DETAILED DESCRIPTION

[0026] It should be noted that the following detailed description is exemplary and is intended to further explain the present application. Unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs.

[0027] Embodiment 1

[0028] In a typical embodiment of the present application, as shown in Figure 1 and Figure 2 An annular focusing single-mode microwave photo-thermal reaction system based on double-temperature one-image temperature measurement is provided, which comprises a gas supply unit, a synthesis reaction unit and a reactant analysis unit connected in sequence, and a temperature measurement unit is installed on the synthesis reaction unit; the synthesis reaction unit comprises an annular single-mode microwave synthesis reactor 11 and a quartz reactor 19, and the annular single-mode microwave synthesis reactor 11 provides microwaves for a catalytic reforming zone 18 in the quartz reactor 19.

[0029] The temperature measurement unit comprises a first infrared temperature measurement probe 7, a second infrared temperature measurement probe 10 and a thermal imaging high-speed camera 13, the first infrared temperature measurement probe 7 and the second infrared temperature measurement probe 10 measure the surface temperature of the catalyst in the quartz reactor, and the thermal imaging high-speed camera 13 measures the overall temperature gradient of the catalyst.

[0030] In this embodiment, the gas supply unit comprises a CO2 gas cylinder 1, an inert gas cylinder 2 and a tar evaporator 3, and the gas supply unit comprises a CO2 gas cylinder, an inert gas cylinder and a tar evaporator connected with a gas mixer 6 through a four-way valve 5, and the gas mixer 6 is connected with the bottom of the quartz reactor 19 through a pipeline. The gases discharged from the tar evaporator 3, the CO2 gas cylinder 1 and the inert gas cylinder 2 are respectively guided out through gas pipes, and flow meters 4 are arranged on the gas pipes of CO2 and inert gas. CO2, inert gas and tar vapor are mixed in the gas mixer 6 through the four-way valve 5, and the mixed gas enters the quartz reactor through the bottom of the quartz reactor.

[0031] In this embodiment, the quartz reactor 19 is arranged inside the annular single-mode microwave synthesis reactor 11 and located at the center position of the annular single-mode microwave synthesis reactor 11, so that the catalyst is located at the center of the waveguide and parallel to the microwave electric field. The annular single-mode microwave synthesis reactor 11 focuses and radiates the quartz reactor 11 through an annular single-mode multi-channel, provides heat for the catalytic reforming zone 18 in the quartz reactor 11, and the annular single-mode microwave synthesis reactor 11 adopts an existing structure, and a microwave power controller 8 is arranged on the annular single-mode microwave synthesis reactor 11.

[0032] In the embodiment, the top of the quartz reactor 19 is provided with a conical head 9, the side of the conical head 9 has a gas outlet connected with a reaction analysis unit through a pipeline, the conical head 9 is connected with the ring-shaped single-mode microwave synthesis reactor 11, and a sealing washer 17 is arranged at the connection position. A quartz sieve plate 20 is arranged in the quartz reactor 19, a thin layer of quartz wool is arranged on the quartz sieve plate 20, a catalyst is arranged on the thin layer of quartz wool, the catalyst is prevented from falling off, a small amount of quartz sand is arranged on the catalyst to prevent the catalyst from being blown off by the carrier gas, and a catalytic reforming area 18 is formed in the area where the catalyst is arranged.

[0033] Further, a detection hole is arranged above the conical head 9, a first infrared temperature measurement probe 7 is arranged at the detection hole, and the first infrared temperature measurement probe 7 is directed towards the catalyst in the quartz reactor 19.

[0034] In the embodiment, the second infrared temperature measurement probe 10 is arranged on the side wall of the ring-shaped single-mode microwave synthesis reactor 11, and the second infrared temperature measurement probe 10 is directed towards the catalyst in the quartz reactor 19.

[0035] In the embodiment, a transparent observation window 12 is arranged on the side wall of the ring-shaped single-mode microwave synthesis reactor 11, and a thermal imaging high-speed camera 13 is arranged outside the transparent observation window 12, and the thermal imaging high-speed camera 13 is directed towards the catalyst in the quartz reactor.

[0036] In the embodiment, the reaction analysis unit comprises a condensing device 14, a gas bag 15 and a gas chromatograph detector 16 connected in sequence, the condensing device 14 is connected with the quartz reactor 19 through a pipeline, the reacted gas is introduced into the condensing device 14 through the gas outlet, the uncondensed gas is introduced into the gas bag 15 first, and the gas is introduced into the gas chromatograph detector 16 for analysis after the experiment.

[0037] Before the experiment, the inert gas cylinder 2 is opened, the gas flow rate is controlled by observing the gas flow meter 4, the inert gas is introduced into the quartz reactor 19, the oxygen in the reactor is discharged, and the oxygen-free environment in the reactor is ensured.

[0038] After the inert gas is introduced for a period of time, the CO2 cylinder 1 and the tar evaporator 3 are opened, and the CO2 flow rate is controlled by observing the gas flow meter. The tar evaporator loads the tar from a liquid state to a gaseous state, the tar vapor flow rate is controlled by adjusting the evaporation rate of the tar evaporator, and it is ensured that the gas ratio can reach the reaction condition. When the gas flow rate reaches the experimental condition, the gas is introduced into the gas mixer 6 through the four-way valve 5 for mixing, and then introduced into the quartz reactor 19 after the mixing is completed.

[0039] Before the reaction, the temperature of the catalytic reforming zone 18 is raised by adjusting the microwave power through the microwave power controller 8 on the ring-shaped single-mode microwave synthesis reactor 11, and the catalytic reforming reaction of the gas in the catalytic reforming zone 18 occurs through the quartz reactor 19. During the reaction, the first infrared temperature measuring probe 7 and the second infrared temperature measuring probe 10 simultaneously measure the surface temperature of the catalyst located in the catalytic reforming zone 18 during the reaction, and the thermal imaging high-speed camera 13 records the catalyst in real time through the transparent observation window 12, observes the thermoelectric effect and plasma effect occurring during the reaction, and provides the temperature distribution of the system from multiple dimensions.

[0040] After the reaction, the gas passes through the gas outlet hole on the conical head 9 and is first introduced into the condensing device 14 to condense the condensable gas in the post-reaction gas. The gas that does not undergo condensation is introduced into the gas bag 15 for storage, and after the reaction is completed, it is introduced into the gas chromatograph detector 16 for detection to obtain the concentration of each gas after the reaction.

[0041] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can be variously changed and modified. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A ring-focused single-mode microwave photothermal reaction system based on dual-temperature, single-image thermometry, characterized in that, It includes a gas supply unit, a synthesis reaction unit, and a reactant analysis unit connected in sequence. The synthesis reaction unit is equipped with a temperature measuring unit. The synthesis reaction unit includes a ring-shaped single-mode microwave synthesis reactor and a quartz reactor. The ring-shaped single-mode microwave synthesis reactor provides heat to the catalytic reforming zone inside the quartz reactor. The temperature measurement unit includes a first infrared temperature measurement probe, a second infrared temperature measurement probe, and a high-speed thermal imaging camera. The first and second infrared temperature measurement probes measure the surface temperature of the catalyst inside the quartz reactor, and the high-speed thermal imaging camera measures the overall temperature gradient of the catalyst.

2. The annular focusing single-mode microwave photothermal reaction system based on dual-temperature and single-image thermometry as described in claim 1, characterized in that, The gas supply unit includes a CO2 cylinder, an inert gas cylinder, and a tar evaporator. The gas supply unit, including the CO2 cylinder, the inert gas cylinder, and the tar evaporator, is connected to a gas mixer via a four-way valve. The gas mixer is connected to the bottom of the quartz reactor via a pipeline.

3. The annular focusing single-mode microwave photothermal reaction system based on dual-temperature and single-image thermometry as described in claim 1, characterized in that, The quartz reactor is located inside the annular single-mode microwave synthesis reactor and at the center of the annular single-mode microwave synthesis reactor.

4. The annular focusing single-mode microwave photothermal reaction system based on dual-temperature and single-image thermometry as described in claim 3, characterized in that, The quartz reactor is equipped with a conical head at the top, and the side of the conical head has an vent hole. The vent hole is connected to the reactant analysis unit through a pipe. The conical head is connected to the annular single-mode microwave synthesis reactor, and a sealing gasket is provided at the connection.

5. The annular focusing single-mode microwave photothermal reaction system based on dual-temperature and single-image thermometry as described in claim 4, characterized in that, A detection hole is provided directly above the conical head, and a first infrared temperature probe is installed at the detection hole, with the first infrared temperature probe facing the catalyst inside the quartz reactor.

6. The annular focusing single-mode microwave photothermal reaction system based on dual-temperature and single-image thermometry as described in claim 1, characterized in that, The second infrared temperature probe is installed on the side wall of the annular single-mode microwave synthesis reactor, with the second infrared temperature probe facing the catalyst inside the quartz reactor.

7. The annular focusing single-mode microwave photothermal reaction system based on dual-temperature and single-image thermometry as described in claim 1, characterized in that, A transparent observation window is provided on the side wall of the annular single-mode microwave synthesis reactor, and a high-speed thermal imaging camera is placed outside the transparent observation window, with the high-speed thermal imaging camera facing the catalyst inside the quartz reactor.

8. The annular focusing single-mode microwave photothermal reaction system based on dual-temperature and single-image thermometry as described in claim 1, characterized in that, The quartz reactor is equipped with a quartz sieve plate, on which a thin layer of quartz wool is laid, and a catalyst is placed on the thin layer of quartz wool.

9. The annular focusing single-mode microwave photothermal reaction system based on dual-temperature and single-image thermometry as described in claim 1, characterized in that, The reactant analysis unit includes a condenser, a gas bag, and a gas chromatograph connected in sequence.

10. The annular focusing single-mode microwave photothermal reaction system based on dual-temperature and single-image thermometry as described in claim 1, characterized in that, The annular single-mode microwave synthesis reactor is equipped with a microwave power controller.

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