A high-temperature and high-pressure microfluidized bed thermochemical reaction measuring device

Abstract

The present application belongs to the technical field of electric heating experimental analysis instrument, and discloses a high-temperature and high-pressure micro fluidized bed thermochemical reaction measuring device, which comprises a high-pressure gas distribution device, a high-pressure pulse sampling device, a high-temperature and high-pressure reactor and an analysis and detection device, one end of the high-pressure pulse sampling device is connected with the high-pressure gas distribution system, the other end is connected with the high-temperature and high-pressure reactor through a high-pressure sampling pipe, the high-pressure gas distribution device is connected with the high-temperature and high-pressure reactor through a high-pressure gas inlet pipe, and the analysis and detection device comprises a filter, a back pressure valve and a mass spectrum which are connected in sequence along the airflow direction. The present application can realize the separate control of temperature and pressure, the internal pressure can be real-time regulated through the back pressure valve and the gas inlet pressure relief valve, the temperature is controlled by a separate temperature control system, the two key reaction conditions of temperature and pressure are decoupled, and the thermochemical reaction analysis and measurement under various reaction conditions such as low temperature and high pressure, high temperature and low pressure and high temperature and high pressure can be realized.

Description

Technical Field

[0001] This invention belongs to the technical field of electrically heated experimental analysis instruments, and more specifically, relates to a high-temperature and high-pressure micro fluidized bed thermochemical reaction measurement device. Background Technology

[0002] With the introduction of the "dual carbon" goal, the clean, low-carbon, and efficient utilization of energy has become one of the mainstream directions of energy science research. In my country, energy utilization is dominated by coal-fired power generation, which accounts for over 40% of total carbon emissions. The efficient and low-carbon utilization of solid fuels is key to achieving the "dual carbon" goal. In recent years, numerous methods for the efficient utilization of solid fuels have emerged, including coal liquefaction, pressurized gasification devices, pressurized oxy-fuel combustion technology, and pressurized chemical looping combustion technology. These technologies all share the commonality of utilizing solid fuels such as coal and biomass under high temperature and high pressure environments to improve utilization efficiency, reduce pollutant emissions, and achieve centralized CO2 treatment. High-pressure environments are effective in increasing reaction rates and reducing sulfur and nitrogen pollutant emissions.

[0003] Before constructing a high-temperature and high-pressure reaction device and system, numerical simulations are necessary to determine key information such as the device's scale, reaction conditions, and product ratios. This is crucial for clarifying construction goals and saving construction costs. However, the reaction models and related reaction kinetic parameters currently used in simulations are mainly based on experimental and summarized patterns under normal pressure conditions, making it difficult to accurately describe reaction processes under high pressure. Constrained by instrument structure design and experimental environment factors, existing high-pressure thermochemical conversion measurement devices struggle to provide consistent results.

[0004] Babiński et al. published a method for determining the combustion kinetic parameters of coal char under pressurized oxygen-enriched conditions using a pressurized thermogravimetric analyzer (TGA) in Thermochimica Acta (vol. 682:178417 (2019)). First, the coal char is placed in a crucible. Then, an oxygen-enriched atmosphere is introduced into the TGA analyzer, and the pressure is increased. Finally, the temperature is increased to determine the weight loss curve. This method successfully yielded the changes in the kinetic parameters of the coal char reaction under different pressures and analyzed the effect of changes in oxygen content on the kinetic parameters. However, the measurement process is not isothermal, resulting in a significant difference from the actual reaction process. Furthermore, the results under different pressures and oxygen contents do not show a clear regularity, and errors in the testing device and method may lead to inaccurate results.

[0005] CN202110740539.0 discloses a self-developed pressurized horizontal furnace and testing method. It uses a high-pressure steel cylinder, a reaction inlet pipe, and a balance gas inlet pipe to introduce reaction gas and balance gas into a quartz reactor and a pressure-bearing shell, respectively. Pressure changes are controlled by an exhaust assembly, and experimental materials are rapidly fed into and removed from the reaction zone under high temperature and pressure by a material feeding assembly, in order to study the thermochemical conversion process of solid fuels under high temperature and pressure. However, in this method, the material accumulates inside the quartz boat, and the heat and mass transfer process differs significantly from that of actual industrial reaction devices. Furthermore, severe gas mixing occurs inside, making it difficult to guarantee the time characteristics of the products and achieve online measurement of the products.

[0006] In summary, existing high-temperature and high-pressure thermochemical conversion measurement devices cannot simultaneously ensure effective heat and mass transfer of materials and the plug flow characteristics of internal gases. This causes the reaction process to deviate from the actual application scenario, and the reaction products mix with each other before detection. As a result, it is impossible to accurately and effectively measure and analyze the thermochemical reaction of solid fuels under high temperature and high pressure, which hinders the establishment and experimental verification of high-temperature and high-pressure gas-solid reaction models. Summary of the Invention

[0007] In view of the above-mentioned defects or improvement needs of the existing technology, the present invention provides a high-temperature and high-pressure micro fluidized bed thermochemical reaction measurement device, which aims to realize the measurement of thermochemical reactions of solid fuels under high temperature and high pressure environment, while ensuring the plug flow characteristics inside the reactor and realizing online measurement of products.

[0008] To achieve the above objectives, according to one aspect of the present invention, a high-temperature and high-pressure micro fluidized bed thermochemical reaction measuring device is provided, comprising a high-pressure gas distribution device, a high-pressure pulse injection device, a high-temperature and high-pressure reactor, and an analytical detection device. The high-pressure gas distribution device comprises a high-pressure gas distribution system 16, a high-pressure mass flow meter pipeline system, an inlet pressure relief valve 21, and a high-pressure inlet pipe 23, which are connected sequentially along the gas flow direction.

[0009] The high-pressure pulse injection device includes a pulse pressure relief valve 15, a high-pressure resistant solenoid valve 14, a pulse injector 11, and a high-pressure injection tube 10, which are connected in sequence along the airflow direction.

[0010] One end of the high-pressure pulse injection device is connected to the high-pressure gas distribution system 16, and the other end is connected to the high-temperature and high-pressure reactor through the high-pressure injection pipe 10; the high-pressure gas distribution device is connected to the high-temperature and high-pressure reactor through the high-pressure gas inlet pipe 23;

[0011] The analytical detection device includes a filter 8, a back pressure valve 7, and a mass spectrometer 6 connected sequentially along the airflow direction; one end of the filter 8 is connected to the high-temperature and high-pressure reactor, and the other end is connected to the back pressure valve 7.

[0012] Preferably, the high-pressure mass flow meter pipeline system includes a high-pressure mass flow meter 17, a high-pressure mass flow meter 18, a high-pressure mass flow meter 19, and a high-pressure mass flow meter 20. The inlet ends of the high-pressure mass flow meter 17, the high-pressure mass flow meter 18, the high-pressure mass flow meter 19, and the high-pressure mass flow meter 20 are respectively connected to the high-pressure gas distribution system 16, and the outlet ends are connected to the inlet pressure relief valve 21.

[0013] Preferably, the high-temperature and high-pressure reactor includes a reactor shell 1, a bed material 2, a sieve plate 24, a heating furnace 3, a thermocouple 13, and a temperature detection device 12; the sieve plate 24 is welded inside the reactor shell 1, the bed material 2 is added to the reactor shell 1 before sealing and placed on the sieve plate 24, the heating furnace 3 surrounds the outside of the reactor shell 1 to maintain the high-temperature environment inside the reactor shell 1; the top of the reactor shell 1 has a metal through hole, the thermocouple 13 extends into the bottom of the reactor shell 1 through the metal through hole to detect the temperature inside the reactor shell 1, and the temperature detection device 12 is connected to the thermocouple 13.

[0014] Preferably, the reactor shell 1 is fixedly connected to the high-pressure air inlet pipe 23 and the high-pressure sample inlet pipe 10 respectively by alloy sleeves, forming a sealed cavity to ensure the stability of the internal pressure.

[0015] Preferably, the device further includes a pressure drop detection device, which includes a differential pressure detector 9, a differential pressure detector 22, and a differential pressure gauge 5. The differential pressure detector 9 is installed on the pipeline between the filter 8 and the high-temperature and high-pressure reactor and is connected to the differential pressure gauge 5 through a three-way valve. The differential pressure detector 22 is installed on the pipeline between the inlet pressure relief valve 21 and the high-pressure sample inlet tube 23 and is connected to the differential pressure gauge 5 through a three-way valve.

[0016] Preferably, the analysis and detection device further includes a computer 4, which is connected to the mass spectrometer 6 via a data cable. The reaction products are carried by the gas into the filter 8 and then the pressure is released through the back pressure valve 7 before entering the mass spectrometer 6 for real-time detection. The detection results are input into the computer 4 for analysis.

[0017] Preferably, the pulse time of the high-pressure resistant solenoid valve 14 is 20-100ms, the pressure it can withstand is not less than 5MPa, and the pulse pressure is 0.2-0.5MPa higher than the internal pressure of the reactor shell; the switching of the high-pressure resistant solenoid valve 14 is controlled by a computer 4 connected to a controller.

[0018] Preferably, the high-pressure sample inlet tube 10 and the high-pressure air inlet tube 23 are made of 316 stainless steel pipes with a diameter of 3mm; the back pressure valve 7 has a temperature resistance of 200℃ or higher.

[0019] Preferably, the flow range of each channel of the high-pressure mass flow meter pipeline system is up to 3000 SCCM, with an accuracy of 1 SCCM.

[0020] Preferably, the pressure range of the reactor shell 1 is 1-4 MPa, the temperature resistance of the sieve plate 24 is set to be above 1000℃, and the stacking height of the bed material 2 is below 20 mm.

[0021] In summary, compared with the prior art, the high-temperature and high-pressure micro fluidized bed thermochemical reaction measuring device provided by the present invention has the following beneficial effects:

[0022] 1. The high-temperature and high-pressure micro fluidized bed thermochemical reaction measuring device of the present invention can realize the separate control of temperature and pressure. The internal pressure can be adjusted in real time through the back pressure valve and the air inlet and pressure relief valve, while the temperature is controlled by a separate temperature control system. The two key reaction conditions of temperature and pressure are decoupled, and it can be applied to thermochemical reaction analysis and measurement under various reaction conditions such as low temperature and high pressure, high temperature and low pressure, and high temperature and high pressure.

[0023] 2. In the high-temperature and high-pressure micro fluidized bed thermochemical reaction measuring device of the present invention, the high-temperature bed material and fluidizing gas inside the micro fluidized bed can ensure a rapid heat and mass transfer process. The test conditions can simulate actual reaction processes in industrial pressurized gasification devices, pressurized oxygen-enriched combustion devices, etc. Furthermore, the reaction device is small, and the overall structure integrates computer software operation, making it easy to install and arrange. It is applicable to the measurement of thermochemical reaction processes of all solid fuels, including coal, biomass, organic solid waste, and municipal solid waste, including but not limited to product analysis and reaction kinetic parameter testing in combustion, pyrolysis, and gasification reactions.

[0024] 3. This invention ensures that the plug flow characteristics inside the reactor remain unchanged while increasing the pressure, and that the time characteristics of product generation are not affected by changes in reactor structure and pressure, thus reducing gas backmixing. At the same time, the high-pressure micro-pulse feeding method results in a very small pulse gas volume during a single injection process, which does not affect the heat and mass transfer and flow characteristics inside the reactor. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the high-temperature and high-pressure micro fluidized bed thermochemical reaction measuring device of the present invention;

[0026] Figure 2 It is a numerical simulation diagram of the internal plug flow state;

[0027] Figure 3 This is a comparison chart of the instantaneous pressure drop curves at 1 MPa between experimental and simulated values.

[0028] Figure 4This is a comparison chart of the average pressure drop curves of experimental and simulated values ​​under different pressures.

[0029] In all the accompanying drawings, the same reference numerals are used to denote the same elements or structures, wherein:

[0030] 1-Reactor shell; 2-Bed material; 3-Heating furnace; 4-Computer; 5-Differential pressure gauge; 6-Mass spectrometer; 7-Back pressure valve; 8-Filter; 9-Differential pressure detector one; 10-High-pressure injection tube; 11-Pulse injector; 12-Temperature detection device; 13-Thermocouple; 14-High-pressure resistant solenoid valve; 15-Pulse pressure relief valve; 16-High-pressure gas distribution system; 17-High-pressure mass flow meter one; 18-High-pressure mass flow meter two; 19-High-pressure mass flow meter three; 20-High-pressure mass flow meter four; 21-Inlet pressure relief valve; 22-Differential pressure detector two; 23-High-pressure inlet pipe; 24-Sieve plate. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0032] Please see Figure 1 This invention discloses a high-temperature and high-pressure micro fluidized bed thermochemical reaction measuring device, comprising a high-pressure gas distribution device, a high-pressure pulse injection device, a high-temperature and high-pressure reactor, and an analytical detection device. The high-pressure gas distribution device includes a high-pressure gas distribution system 16, a high-pressure mass flow meter pipeline system, an inlet pressure relief valve 21, and a high-pressure inlet pipe 23, connected sequentially along the gas flow direction. The high-pressure pulse injection device includes a pulse pressure relief valve 15, a high-pressure resistant solenoid valve 14, a pulse injector 11, and a high-pressure injection pipe 10, connected sequentially along the gas flow direction. One end of the high-pressure pulse injection device is connected to the high-pressure gas distribution system 16, and the other end is connected to the high-temperature and high-pressure reactor through the high-pressure injection pipe 10. The high-pressure gas distribution device and the high-temperature and high-pressure reactor are connected through the high-pressure inlet pipe 23.

[0033] The analytical detection device includes a filter 8, a back pressure valve 7, and a mass spectrometer 6 connected in sequence along the airflow direction; one end of the filter 8 is connected to a high-temperature and high-pressure reactor, and the other end is connected to the back pressure valve 7.

[0034] The high-pressure mass flow meter pipeline system includes high-pressure mass flow meter 17, high-pressure mass flow meter 28, high-pressure mass flow meter 319, and high-pressure mass flow meter 420. The inlet ends of high-pressure mass flow meter 17, high-pressure mass flow meter 28, high-pressure mass flow meter 319, and high-pressure mass flow meter 420 are respectively connected to the high-pressure gas distribution system 16, which can introduce four different gases according to actual needs. The outlet ends are connected to the inlet pressure relief valve 21.

[0035] The high-temperature and high-pressure reactor includes a reactor shell 1, a bed material 2, a sieve plate 24, a heating furnace 3, a thermocouple 13, and a temperature detection device 12. The sieve plate 24 is welded inside the reactor shell 1. The bed material 2 is added to the reactor shell 1 before sealing and placed on the sieve plate 24. The heating furnace 3 surrounds the outside of the reactor shell 1 to maintain the high-temperature environment inside the reactor shell 1. A metal through hole is opened at the top of the reactor shell 1. The thermocouple 13 extends into the bottom of the reactor shell 1 through the metal through hole to detect the temperature inside the reactor shell 1. The temperature detection device 12 is connected to the thermocouple 13.

[0036] The reactor shell 1 is fixedly connected to the high-pressure air inlet pipe 23 and the high-pressure sample inlet pipe 10 respectively by alloy clamps. Once fixed, they are not disassembled and together form a sealed cavity to ensure that the airtightness and pressure threshold remain unchanged, thus ensuring the stability of the internal pressure.

[0037] Furthermore, it also includes a pressure drop detection device, which comprises a differential pressure detector 9, a differential pressure detector 22, and a differential pressure gauge 5. Differential pressure detector 9 is installed on the pipeline between the filter 8 and the high-temperature, high-pressure reactor, and is connected to the differential pressure gauge 5 via a three-way valve. Differential pressure detector 22 is installed on the pipeline between the inlet pressure relief valve 21 and the high-pressure sample inlet pipe 23, and is also connected to the differential pressure gauge 5 via a three-way valve. The pressure drop detection device is used to detect the gas pressure drop across the high-temperature, high-pressure reactor and, based on this, to determine the gas flow state and reaction process inside the reactor, such as whether there is blockage in the reaction pipeline or leakage. The detection results are displayed on the computer 4.

[0038] The analysis and detection device also includes a computer 4, which is connected to a mass spectrometer 6 via a data cable. The reaction products are carried by the gas into the filter 8 and then the pressure is released through the back pressure valve 7 before entering the mass spectrometer 6 for real-time detection. The detection results are input into the computer 4 for analysis.

[0039] The pulse time of the high-pressure resistant solenoid valve 14 is 20-100ms, the pressure it can withstand is not less than 5MPa, and the pulse pressure is 0.2-0.5MPa higher than the internal pressure of the reactor shell; the switching of the high-pressure resistant solenoid valve 14 is controlled by the computer 4 connected to the controller.

[0040] The high-pressure sample inlet tube 10 and the high-pressure air inlet tube 23 are made of 316 stainless steel pipe with a diameter of 3mm; the back pressure valve 7 has a temperature resistance of over 200℃ so that the valve structure will not be affected when heat preservation measures are applied in the analysis and detection device.

[0041] The maximum flow range of each channel in the high-pressure mass flow meter pipeline system is 3000 SCCM, with an accuracy of 1 SCCM, to ensure that the corresponding flow can be well controlled under pressure changes, so as to maintain the fluidization characteristics after pressure increase.

[0042] The pressure range of the reactor shell 1 is 1-4 MPa, which ensures that the internal plug flow characteristics of the gas are basically unaffected by pressure changes, and the impact of pulses on the plug flow is also relatively small; the sieve plate 24 is set to withstand a temperature of over 1000℃, and the bed material 2 is stacked at a height of less than 20 mm; the filter 8 is used to filter the bed material 2 that is affected by pressure and flow rate changes and large particulate pollutants generated after thermochemical reactions.

[0043] The working process of the high-temperature and high-pressure micro fluidized bed thermochemical reaction measuring device in this embodiment is as follows:

[0044] After filling the appropriate bed material, turn on the heating furnace 3 to raise the internal temperature of the reactor shell 1 to a suitable level; open the inlet pressure relief valve 21 to ensure that no airflow enters the reactor during sample introduction; after opening the pulse sampler 11, add the solid reactant powder to be involved in the thermochemical reaction. After closing the pulse sampler 11, open the high-pressure gas distribution system 16 to start introducing high-pressure gas, with an initial inlet flow rate of 200 SCCM. After the pressure stabilizes, gradually tighten the back pressure valve 7. After the inlet flow rate decreases, continue to increase the pressure of the gas distribution section, increasing it in increments of 100 SCCM. While the internal pressure of the reactor increases, the pressure of the gas distribution section is also increased to ensure that the pressure of the gas distribution section is always higher than the internal pressure of the reactor. When the pressure rises to the required operating condition, adjust the pulse time of the high-pressure resistant solenoid valve 14 to 20 ms. The computer 4 operates the high-pressure resistant solenoid valve 14 to pulse, sending the reactants into the reactor shell 1. The mass spectrometer 6 can detect the concentration and time characteristics of small molecule product components in the tail gas after the reaction in real time. The collected data can be used for further analysis and calculation.

[0045] The high-temperature and high-pressure micro fluidized bed thermochemical reaction measurement device of the present invention is applicable to the measurement of gas-solid thermochemical reactions of all solid fuels under pressure, including but not limited to pressurized combustion, gasification, and pyrolysis processes. The flow inside the reactor is near-horizontal plug flow, and the time characteristics of the generated products are not destroyed, enabling online measurement and analysis of the products during the pressurized reaction process.

[0046] like Figure 2As shown, numerical simulation software was used to verify whether the internal flow field of the present invention has plug flow characteristics during the reaction process. The results show that when the internal pressure is less than 10 MPa, the device can maintain a good near-plug flow state, ensuring that the time characteristics of the products during the entire reaction process are not affected by the gas path design in the device, and reducing the impact of gas backmixing on the accuracy of the test.

[0047] Figure 3 This is a comparison graph of the instantaneous pressure drop curves at 1 MPa between experimental and simulated values. Figure 4 The graph shows a comparison of the average pressure drop curves of experimental and simulated values ​​under different pressures. Since the inside of the reaction device is a high-pressure "black box" state and cannot be directly measured, the pressure drop, an important indicator of fluidization state, is used as a reference for the numerical simulation results. The results show that the actual internal state differs from the numerical simulation by less than 5%, which verifies that the high-temperature and high-pressure micro fluidized bed thermochemical reaction measurement device of the present invention can ensure the near-flat plug flow characteristics of the internal flow field under high-temperature and high-pressure reaction conditions.

[0048] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A high-temperature, high-pressure micro fluidized bed thermochemical reaction measuring device, characterized in that: Includes high-pressure gas distribution device, high-pressure pulse injection device, high-temperature and high-pressure reactor and analytical detection device; The high-pressure gas distribution device includes a high-pressure gas distribution system (16), a high-pressure mass flow meter pipeline system, an inlet pressure relief valve (21), and a high-pressure inlet pipe (23) connected in sequence along the airflow direction. The high-pressure pulse injection device includes a pulse pressure relief valve (15), a high-pressure resistant solenoid valve (14), a pulse injector (11), and a high-pressure injection tube (10) connected in sequence along the airflow direction. One end of the high-pressure pulse injection device is connected to the high-pressure gas distribution system (16), and the other end is connected to the high-temperature and high-pressure reactor through the high-pressure injection pipe (10); the high-pressure gas distribution device is connected to the high-temperature and high-pressure reactor through the high-pressure gas inlet pipe (23); The analytical detection device includes a filter (8), a back pressure valve (7), and a mass spectrometer (6) connected in sequence along the airflow direction; one end of the filter (8) is connected to the high temperature and high pressure reactor, and the other end is connected to the back pressure valve (7). It also includes a pressure drop detection device, which includes a differential pressure detector 1 (9), a differential pressure detector 2 (22), and a differential pressure gauge (5); the differential pressure detector 1 (9) is installed on the pipeline between the filter (8) and the high temperature and high pressure reactor, and is connected to the differential pressure gauge (5) through a three-way valve; the differential pressure detector 2 (22) is installed on the pipeline between the inlet pressure relief valve (21) and the high pressure inlet pipe (23), and is connected to the differential pressure gauge (5) through a three-way valve; The high-temperature and high-pressure micro fluidized bed thermochemical reaction measuring device regulates the internal pressure in real time through the back pressure valve (7) and the inlet and outlet pressure relief valve (21), and controls the temperature through a separate temperature control system to achieve separate control of temperature and pressure. This decouples the two key reaction conditions of temperature and pressure, making it suitable for thermochemical reaction analysis and measurement under various reaction conditions such as low temperature and high pressure, high temperature and low pressure, and high temperature and high pressure. Furthermore, it ensures that the plug flow characteristics inside the reactor do not change while increasing the pressure, and that the time characteristics of product generation are not affected by changes in reactor structure and pressure, thereby reducing gas backmixing.

2. The high-temperature and high-pressure micro fluidized bed thermochemical reaction measuring device as described in claim 1, characterized in that: The high-pressure mass flow meter pipeline system includes high-pressure mass flow meter one (17), high-pressure mass flow meter two (18), high-pressure mass flow meter three (19), and high-pressure mass flow meter four (20). The inlet ends of high-pressure mass flow meter one (17), high-pressure mass flow meter two (18), high-pressure mass flow meter three (19), and high-pressure mass flow meter four (20) are respectively connected to the high-pressure gas distribution system (16), and the outlet ends are connected to the inlet pressure relief valve (21).

3. The high-temperature and high-pressure micro fluidized bed thermochemical reaction measuring device as described in claim 1, characterized in that: The high-temperature and high-pressure reactor includes a reactor shell (1), a bed material (2), a sieve plate (24), a heating furnace (3), a thermocouple (13), and a temperature detection device (12). The sieve plate (24) is welded inside the reactor shell (1). The bed material (2) is added to the reactor shell (1) before sealing and placed on the sieve plate (24). The heating furnace (3) surrounds the outside of the reactor shell (1) to maintain the high-temperature environment inside the reactor shell (1). The top of the reactor shell (1) has a metal through hole. The thermocouple (13) penetrates into the bottom of the reactor shell (1) through the metal through hole to detect the temperature inside the reactor shell (1). The temperature detection device (12) is connected to the thermocouple (13).

4. The high-temperature and high-pressure micro fluidized bed thermochemical reaction measuring device as described in claim 3, characterized in that: The reactor shell (1) is fixedly connected to the high-pressure air inlet pipe (23) and the high-pressure sample inlet pipe (10) respectively by alloy sleeves, forming a sealed cavity to ensure the stability of the internal pressure.

5. The high-temperature and high-pressure micro fluidized bed thermochemical reaction measuring device as described in claim 1, characterized in that: The analysis and detection device also includes a computer (4), which is connected to the mass spectrometer (6) via a data line. The reaction products are carried by the gas into the filter (8) and then the pressure is released through the back pressure valve (7) before entering the mass spectrometer (6) for real-time detection. The detection results are input into the computer (4) for analysis.

6. The high-temperature and high-pressure micro fluidized bed thermochemical reaction measuring device as described in claim 5, characterized in that: The pulse time of the high-pressure resistant solenoid valve (14) is 20-100 ms, the pressure it can withstand is not less than 5 MPa, and the pulse pressure is 0.2-0.5 MPa higher than the internal pressure of the reactor shell; the switching of the high-pressure resistant solenoid valve (14) is controlled by the computer (4) connected to the controller.

7. The high-temperature and high-pressure micro fluidized bed thermochemical reaction measuring device as described in claim 1, characterized in that: The maximum flow range of each channel of the high-pressure mass flow meter pipeline system is 3000 SCCM, with an accuracy of 1 SCCM.

8. The high-temperature and high-pressure micro fluidized bed thermochemical reaction measuring device as described in claim 3, characterized in that: The pressure range of the reactor shell (1) is 1-4 MPa, the temperature resistance of the sieve plate (24) is set to be above 1000 ℃, and the stacking height of the bed material (2) is below 20 mm.

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