Detachable microwave pyrolysis biomass material mass and temperature change detection device

Abstract

The utility model provides a detachable quality and temperature change detection device for microwave pyrolysis biomass materials, and belongs to the technical field of biomass energy technologies and analytical instruments. The problem of how to design a novel microwave pyrolysis experimental device is solved. A quartz supporting frame is placed on an electronic balance, a quartz crucible is placed on the quartz supporting frame, the quartz crucible is located in a quartz protection cover, the quartz protection cover is located in a microwave heating shell, the quartz protection cover comprises an upper cover and a lower cover, and the upper cover and the lower cover are detachable. The quartz protective cover is provided with the detachable upper cover and the detachable lower cover, so that the flexibility and the adaptability of an experiment are improved, the temperature of different positions can be accurately measured by a thermocouple due to the design of integrated temperature monitoring and three channels of the upper cover, the accuracy of temperature monitoring in the pyrolysis process is ensured, and an oxygen-free environment control structure is introduced, so that the safety of the experiment is improved. Inert gas is introduced through the guide pipe, gas generated by pyrolysis is effectively exhausted, and a high-quality oxygen-free environment is maintained.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of biomass energy and analytical instrument, especially relates to a detachable quality and temperature change detection device of microwave pyrolysis biomass material, and the device is specially designed for measuring the quality and temperature change of various biomass materials in the microwave pyrolysis process.The technical field combines biomass thermochemical conversion, precision instrument design, process control and monitoring and multiple technical directions. BACKGROUND

[0002] Biomass energy, as an important branch of renewable energy, has attracted extensive attention in research and development of its efficient conversion technology.Pyrolysis technology, especially microwave pyrolysis technology, shows great potential as it can convert biomass raw materials into high-energy-density bio-oil, combustible gas and biochar at relatively low energy consumption.

[0003] Microwave pyrolysis technology uses microwave energy to rapidly and uniformly heat biomass raw materials, promoting the thermochemical decomposition of biomass.Compared with traditional pyrolysis technology, microwave pyrolysis technology has the advantages of fast reaction speed, high product quality and low energy consumption.However, existing microwave pyrolysis devices have some limitations in experimental research and industrial application, especially in real-time monitoring and quality control.

[0004] Firstly, although traditional thermogravimetric analyzers (TGA) are widely used in pyrolysis research, they are generally not suitable for mass analysis under microwave conditions.TGA can provide accurate mass loss data during conventional pyrolysis, but under microwave conditions, the measurement accuracy and stability of TGA may be affected due to the particularity of microwave heating, including the non-uniformity of heating rate and the possible electromagnetic field interference during microwave heating.

[0005] Secondly, existing microwave pyrolysis devices usually lack precise mass monitoring systems, which cannot monitor the mass change of products in real time during the pyrolysis process.This limits the in-depth understanding of the pyrolysis process and process optimization.In addition, most existing devices are not flexible enough to adapt to different types of biomass raw materials such as microalgae, sludge, agricultural waste and forestry waste, which limits their application range and experimental research diversity.

[0006] Furthermore, existing thermogravimetric analysis devices often cannot achieve true oxygen-free conditions during product collection, which may cause oxidation of products during collection, affecting the accuracy of experimental results.This is in sharp contrast to the strict requirement of oxygen-free environment during microwave heating, as many reactions during microwave pyrolysis are very sensitive to oxygen.It is particularly urgent to develop a new type of microwave pyrolysis experimental device to address the above problems. UTILITY MODEL CONTENT

[0007] Therefore, in order to solve the technical problems mentioned in the background art, the utility model provides a detachable quality and temperature change detection device for microwave pyrolysis of biomass materials, which can monitor and analyze the mass change in the pyrolysis process in real time, and has temperature monitoring function to ensure accurate control of the pyrolysis process. In addition, the device is designed to be detachable and modular to facilitate quick adjustment and adaptation to different biomass raw materials according to different experimental requirements. Finally, the device can effectively collect pyrolysis products under anaerobic conditions to ensure the accuracy and reliability of the experimental results.

[0008] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a detachable quality and temperature change detection device for microwave pyrolysis of biomass materials, which comprises a microwave heating shell, a quartz protective cover, a quartz crucible, a quartz support frame and an electronic balance, the electronic balance is placed with the quartz support frame, the quartz support frame is placed with the quartz crucible, the quartz crucible is located in the quartz protective cover, the quartz protective cover is located in the microwave heating shell, the quartz protective cover comprises an upper cover and a lower cover, and the upper cover and the lower cover can be detached. The microwave heating shell is provided with a microwave heating structure, which can heat the sample in the quartz crucible. The microwave heating shell is similar to a microwave oven in shape, the quartz protective cover and the quartz crucible are located in the heating cavity, and the heating cavity is provided with a hatch, a thermocouple penetrates through the heating cavity, and a vertical support part of the quartz support frame penetrates through the lower part.

[0009] Further, the upper cover and the lower cover are combined by a ground joint process.

[0010] Further, the upper cover is provided with a first channel, a second channel and a third channel.

[0011] Further, the first channel is provided with an O-ring for inserting a K-type thermocouple.

[0012] Further, the second channel and the third channel are respectively used for discharging volatile gas generated in the pyrolysis process and introducing inert gas to maintain an anaerobic environment in the quartz protective cover.

[0013] Further, the quartz support frame is of an I-shaped structure, wherein the upper horizontal part is located in the quartz protective cover, and the middle vertical support part penetrates through the lower cover.

[0014] Further, the lower cover is provided with a special channel and is provided with an O-ring for inserting the middle vertical support part of the quartz support frame 4.

[0015] Further, the mating surface of the quartz support frame and the quartz protective cover is treated by a ground joint process.

[0016] Further, the microwave heating shell is also provided with an emergency stop button and a control panel.

[0017] Compared with the prior art, the beneficial effects of the detachable quality and temperature change detection device for microwave pyrolysis of biomass materials are:

[0018] (1) The utility model discloses modular design, and the detachable upper cover and lower cover of quartz protective cover allow users to easily replace different sizes and types of biomass materials according to experimental requirements, improve the flexibility and adaptability of experiment. Through the design of standard interface, the disassembly time of the upper cover and the lower cover is reduced by 50%, and the experimental preparation process is accelerated.

[0019] (2) The utility model discloses integrated temperature monitoring, and the three channel design of the upper cover makes that thermocouple can accurately measure the temperature of different positions, ensures the accuracy of temperature monitoring in the pyrolysis process. The thermocouple measurement error is controlled within ±1%, and the reliability of temperature data is improved.

[0020] (3) The utility model discloses the introduction of oxygen-free environment control structure, and the inert gas is introduced through the pipe, effectively discharges the gas produced in pyrolysis, maintains the high-quality oxygen-free environment, avoids the oxidation of pyrolysis material. Inert gas replacement efficiency is improved, and the oxygen concentration can be stably maintained below 1ppm.

[0021] (4) The utility model discloses high-precision sealing, and the ground joint treatment at the cooperation place of upper and lower covers ensures the sealing of quartz protective cover, prevents the penetration of external gas, guarantees the purity of experiment. In the airtightness test, the leakage rate is less than 0.01mL / min.

[0022] (5) The utility model discloses high-temperature support frame, and the I-shaped support frame adopts high-purity quartz material, can bear high temperature up to 1000 DEG C, ensures the stability under extreme conditions. The support frame design guarantees the uniform heating of pyrolysis material under high temperature, and improves the pyrolysis efficiency.

[0023] (6) The utility model discloses simple operation, and the detachable design and ground joint treatment of support frame simplify the experimental operation, improve the convenience and repeatability of experiment.

[0024] (7) The utility model discloses the improvement of simple operation, and the experimental preparation time is reduced by 30%. BRIEF DESCRIPTION OF DRAWINGS

[0025] The drawings that constitute a part of the utility model are used to provide further understanding of the utility model, and the illustrative embodiment of the utility model and its explanation are used to explain the utility model, and do not constitute improper limitation to the utility model. In the drawings:

[0026] Figure 1The structure schematic view of the base of the quartz support frame of the detachable microwave pyrolysis biomass material quality and temperature change detection experiment device is described in the utility model.

[0027] Figure 2 The structure schematic view of the base of the quartz support frame of the detachable microwave pyrolysis biomass material quality and temperature change detection experiment device is described in the utility model.

[0028] Figure 3 The structure schematic view of the quartz support frame of the detachable microwave pyrolysis biomass material quality and temperature change detection experiment device is described in the utility model.

[0029] Figure 4 The structure schematic view of the quartz support frame of the detachable microwave pyrolysis biomass material quality and temperature change detection experiment device is described in the utility model.

[0030] Figure 5 The structure schematic view of the quartz support frame of the detachable microwave pyrolysis biomass material quality and temperature change detection experiment device is described in the utility model.

[0031] In the drawing: 1 - emergency stop button, 2 - quartz protection cover, 3 - quartz crucible, 4 - quartz support frame, 5 - thermocouple, 6 - control panel, 7 - sample, 8 - electronic balance, 9 - No. 1 channel, 10 - No. 2 channel, 11 - No. 3 channel, 12 - special channel. Specific implementation

[0032] The technical solutions in the embodiments of the utility model will be clearly and completely described in combination with the drawings in the embodiments of the utility model. It should be explained that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict, and the described embodiments are only a part of the embodiments of the utility model, not all the embodiments.

[0033] Referring to Figures 1-5 In order to describe the embodiment, a detachable microwave pyrolysis biomass material quality and temperature change detection device is disclosed, which comprises a microwave heating shell, a quartz protection cover 2, a quartz crucible 3, a quartz support frame 4 and an electronic balance 8, the electronic balance 8 is placed with the quartz support frame 4, the quartz support frame 4 is placed with the quartz crucible 3, the quartz crucible 3 is located in the quartz protection cover 2, the quartz protection cover 2 is located in the microwave heating shell, the quartz protection cover 2 comprises an upper cover and a lower cover, and the upper cover and the lower cover can be detached.

[0034] The quartz support frame 4 is of an I-shaped structure, wherein the upper horizontal part is located in the quartz protection cover 2, and the middle vertical support part passes through the lower cover. The lower cover is provided with a special channel 12 and is equipped with an O-ring for inserting the middle vertical support part of the quartz support frame 4.

[0035] The matching surface of the quartz support frame 4 and the quartz protection cover 2 is treated by grinding.

[0036] The microwave heating shell is further provided with an emergency stop button 1 and a control panel 6.

[0037] The microwave heating shell is provided with a microwave heating structure, which can perform microwave heating on the sample 7 in the quartz crucible 3. The microwave heating shell is similar to a microwave oven in shape, the quartz protective cover 2 and the quartz crucible 3 are located in the heating cavity thereof, and the heating cavity is provided with a hatch, a thermocouple 5 penetrates through the heating cavity, and a vertical supporting portion of a quartz supporting frame 4 penetrates through the lower part.

[0038] The microwave pyrolysis experimental device developed by the utility model is provided with a split-type quartz protective cover 2, which is composed of a detachable upper cover and a lower cover, so as to facilitate an operator to place different sizes and types of biomass experimental materials into the reaction chamber.

[0039] The upper cover is specially designed with three independent channels: a first channel 9 is provided with an O-ring and is used for inserting a K-type thermocouple 5 (Chromel-Alumel) to perform real-time temperature monitoring; a second channel 10 and a third channel 11 are designed with gas inlets and outlets and are respectively used for discharging volatile gases generated in the pyrolysis process and introducing inert gases (such as nitrogen or argon) to maintain an oxygen-free environment (<1 ppm of oxygen) in the reaction chamber.

[0040] The lower cover is provided with a special channel 12, which is provided with an O-ring and is used for inserting a quartz supporting frame 4. The quartz supporting frame is made of high-temperature-resistant quartz material and is designed to withstand an experimental temperature of up to 1000 DEG C, so as to ensure that the biomass material remains stable during the pyrolysis process.

[0041] The upper and lower covers of the quartz protective cover 2 are combined by a ground joint process, which ensures the air tightness of the combined surface and prevents external gases from contacting the reaction material during the pyrolysis process, thereby ensuring the accuracy and repeatability of the experiment.

[0042] In addition, the I-shaped quartz supporting frame 4 used on the electronic balance 8 is also made of high-purity quartz material and is designed to be detachable to adapt to biomass materials of different shapes and sizes. The mating surface of the supporting frame 4 and the quartz protective cover 2 is also finely ground to ensure the stability of the supporting frame and the correct positioning of the biomass material at high temperatures.

[0043] The above disclosed embodiments of the utility model are only used to help explain the utility model. The embodiments do not describe all the details and limit the utility model to the specific implementation. According to the content of the specification, many modifications and changes can be made. The specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the utility model, so that the person skilled in the art can well understand and utilize the utility model.

Claims

1. A detachable device for detecting mass and temperature changes of microwave pyrolysis biomass materials, characterized by: The invention comprises a microwave heating housing, a quartz protective cover (2), a quartz crucible (3), a quartz support frame (4) and an electronic balance (8); the quartz support frame (4) is placed on the electronic balance (8); the quartz crucible (3) is placed on the quartz support frame (4); the quartz crucible (3) is located in the quartz protective cover (2); the quartz protective cover (2) is located in the microwave heating housing; the quartz protective cover (2) comprises an upper cover and a lower cover; and the upper cover and the lower cover are detachable.

2. The detachable device for detecting mass and temperature changes of microwave-heat-decomposed biomass materials according to claim 1, characterized in that: The joint between the upper cover and the lower cover is processed by a grinding process.

3. The detachable device for detecting mass and temperature changes of microwave-thermolyzed biomass materials according to claim 1 or 2, characterized in that: The upper cover is provided with a first channel (9), a second channel (10) and a third channel (11).

4. The detachable device for detecting mass and temperature changes of microwave-thermolyzed biomass materials according to claim 3, characterized in that: The first channel (9) is equipped with an O-ring for inserting a thermocouple (5).

5. The detachable device for detecting mass and temperature changes of microwave-thermolyzed biomass materials according to claim 3, characterized in that: The second channel (10) and the third channel (11) are respectively used to discharge volatile gases generated during the pyrolysis process and introduce inert gas to maintain an oxygen-free environment in the quartz protective cover (2).

6. The detachable device for detecting mass and temperature changes of biomass materials subjected to microwave pyrolysis according to claim 1, characterized in that: The quartz support frame (4) is an I-shaped structure, wherein the upper horizontal portion is located inside the quartz protective cover (2), and the middle vertical support portion passes through the lower cover.

7. The detachable device for detecting mass and temperature changes of microwave-thermolyzed biomass materials according to claim 6, characterized in that: The lower cover is provided with a dedicated channel (12) equipped with an O-ring for inserting the middle vertical support portion of the quartz support frame (4).

8. The detachable device for detecting mass and temperature changes of microwave-thermolyzed biomass materials according to claim 7, characterized in that: The matching surfaces of the quartz support frame (4) and the quartz protective cover (2) are ground.

9. The detachable device for detecting mass and temperature changes of microwave-thermolyzed biomass materials according to claim 1, characterized in that: The microwave heating housing is also provided with an emergency stop button (1) and a control panel (6).

Images