Thermal chemical reaction measuring device for high-temperature and high-pressure miniature fluidized bed

Abstract

The invention belongs to the related technical field of electric heating experiment analysis instruments, and discloses a high-temperature and high-pressure micro fluidized bed thermal chemical 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, the other end is connected with the high-temperature high-pressure reactor through a high-pressure sample feeding pipe; the high-pressure gas distribution device is connected with the high-temperature high-pressure reactor through a high-pressure gas inlet pipe; the analysis and detection device comprises a filter, a back pressure valve and a mass spectrum which are sequentially connected along the airflow direction. According to the invention, the temperature and the pressure can be respectively controlled, the internal pressure can be regulated and controlled in real time through the back pressure valve and the air inlet pressure relief valve, the temperature is controlled by an independent temperature control system, and two key reaction working conditions of the temperature and the pressure are decoupled; the device can be suitable for thermochemical reaction analysis and measurement under various reaction working conditions such as low temperature and high pressure, high temperature and low pressure and high temperature and high pressure.

Description

Technical Field

[0001] The present invention belongs to the technical field related to electric heating experimental analysis instruments, and more specifically, relates to a high-temperature and high-pressure micro fluidized bed thermochemical reaction measuring device. Background Art

[0002] With the proposal of the "dual carbon" goal, clean, low-carbon and efficient use of energy has become one of the mainstream directions of current energy science research. my country's energy utilization is dominated by coal-based thermal power, and carbon emissions from thermal power generation account for more than 40% of total carbon emissions. The efficient and low-carbon utilization of solid fuels is the key to achieving the "dual carbon" goal. In recent years, a large number of efficient utilization methods of solid fuels have emerged, including coal liquefaction, pressurized gasification equipment, pressurized oxygen-enriched combustion technology, pressurized chemical chain combustion technology, etc. The common point of these technologies is that they need to use solid fuels such as coal and biomass under high temperature and high pressure environments to improve utilization efficiency and reduce pollutant emissions. CO 2 Centralized treatment and other goals. High pressure environment has a good effect on increasing reaction rate and reducing sulfur and nitrogen pollutant emissions.

[0003] Before building a high-temperature and high-pressure reaction device and system, it is necessary to first perform a numerical simulation to determine key information such as the scale of the device, reaction conditions, and product ratio. 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 the laws experimentally and summarized under normal pressure, and it is difficult to accurately describe the reaction process under high-pressure conditions. Due to the constraints of instrument structure design and experimental environment factors, it is difficult for existing high-pressure environment thermochemical conversion measurement devices to give consistent results.

[0004] Babiński.P et al. disclosed a method for measuring the combustion reaction kinetic parameters of coal char in a pressurized oxygen-rich environment using a pressurized thermogravimetric analyzer in the journal Thermochimica Acta (vol.682:178417(2019)). First, the coal char is placed in a crucible, then an oxygen-rich atmosphere is introduced into the thermogravimetric analyzer and the pressure is increased, and finally the temperature is increased to measure the weight loss curve. This method successfully gives the changes in the kinetic parameters of coal char reactions under different pressures, and analyzes the effects of changes in oxygen content on the kinetic parameters. However, its measurement process is not an isothermal measurement, and there is a large gap with the actual reaction process. Moreover, the results under different pressures and different oxygen contents do not show obvious regularity, and errors in the test device and method may lead to inaccurate results.

[0005] CN202110740539.0 discloses a self-developed pressurized horizontal furnace and test method, which uses a high-pressure steel cylinder, a reaction air inlet pipe and a balance gas air inlet pipe to pass the reaction gas and the balance gas into the quartz reactor and the pressure-bearing shell respectively, and controls the pressure change through the exhaust assembly, and the experimental material is quickly sent into and removed from the reaction area under high temperature and high pressure through the material feeding assembly, so as to realize the study of the thermochemical conversion process of solid fuels under high temperature and high pressure. However, in this method, the material is accumulated inside the quartz boat, and the heat and mass transfer process is quite different from the reaction device of actual industrial application, and the internal gas mixing is serious, making it difficult to ensure the time characteristics of the product and realize the online measurement of the product.

[0006] In summary, the existing high-temperature and high-pressure thermochemical conversion measurement devices are difficult to simultaneously ensure the effective heat and mass transfer of materials and the plug flow characteristics of the internal gas, resulting in the reaction process deviating from the actual application scenario. The reaction products are mixed with each other before detection, and it is impossible to accurately and effectively measure and analyze the thermochemical reactions of solid fuels under high temperature and pressure, which hinders the establishment and experimental verification of high-temperature and high-pressure gas-solid reaction models. Summary of the invention

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

[0008] To achieve the above-mentioned purpose, 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 analysis and detection device, wherein the high-pressure gas distribution device comprises a high-pressure gas distribution system 16, a high-pressure mass flowmeter pipeline system, an intake pressure relief valve 21, and a high-pressure intake pipe 23 connected in sequence along the gas flow direction;

[0009] The high-pressure pulse injection device comprises a pulse pressure relief valve 15, a high-pressure electromagnetic valve 14, a pulse injector 11, and a high-pressure injection tube 10 which are sequentially connected 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 a high-pressure injection pipe 10; the high-pressure gas distribution device is connected to the high-temperature and high-pressure reactor through a high-pressure air intake pipe 23;

[0011] The analysis and detection device includes a filter 8, a back pressure valve 7, and a mass spectrometer 6 which are sequentially connected along the air flow 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 flowmeter pipeline system includes a high-pressure mass flowmeter 17, a high-pressure mass flowmeter 18, a high-pressure mass flowmeter 19, and a high-pressure mass flowmeter 20. The air inlet ends of the high-pressure mass flowmeter 17, the high-pressure mass flowmeter 18, the high-pressure mass flowmeter 19, and the high-pressure mass flowmeter 20 are respectively connected to the high-pressure gas distribution system 16, and the air outlet ends are connected to the air intake 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 to the inside of the reactor shell 1, the bed material 2 is added to the inside of the reactor shell 1 before sealing, and is placed on the sieve plate 24, the heating furnace 3 is surrounded by the outside of the reactor shell 1, and is used 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, and the thermocouple 13 penetrates into the bottom of the reactor shell 1 through the metal through hole, and is used 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 through alloy ferrules, and together they form a closed cavity to ensure the stability of the internal pressure.

[0015] Preferably, it also 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 arranged 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 arranged on the pipeline between the intake pressure relief valve 21 and the high-pressure injection tube 23, and is connected to the differential pressure gauge 5 through a three-way valve.

[0016] Preferably, the analysis and detection device also includes a computer 4, which is connected to the mass spectrometer 6 via a data line. The reaction product is carried by the gas into the filter 8, the pressure is released through the back pressure valve 7, and enters 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 withstand pressure is not less than 5Mpa, and the pulse pressure is 0.2-0.5Mpa higher than the internal pressure of the reactor shell; the switch of the high pressure resistant solenoid valve 14 is controlled by the computer 4 connected to the controller.

[0018] Preferably, the high-pressure sample inlet pipe 10 and the high-pressure air inlet pipe 23 are set as 3 mm 316 stainless steel pipes; the back-pressure valve 7 has a tolerable temperature of above 200°C.

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

[0020] Preferably, the pressure range of the reactor shell 1 is 1-4 MPa, the sieve plate 24 has a temperature tolerance of more than 1000° C., and the stacking height of the bed material 2 is less than 20 mm.

[0021] In general, compared with the prior art, the above technical solution conceived by the present invention provides a high-temperature and high-pressure micro fluidized bed thermochemical reaction measurement device which 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 intake pressure relief valve, and 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 microfluidized bed thermochemical reaction measurement device of the present invention, the high-temperature bed material and fluidizing gas inside the microfluidized bed can ensure a rapid heat and mass transfer process, and the test conditions can simulate the actual reaction processes of industrial pressurized gasification devices, pressurized oxygen-enriched combustion devices, etc., and the reaction device is small, and the overall structure integrates computer software operation, which is easy to install and arrange. It can be applied to the measurement of thermochemical reaction processes of all solid fuels including coal, biomass, organic solid waste, domestic garbage, etc., including but not limited to combustion, pyrolysis, product analysis in gasification reactions, reaction kinetic parameter testing, etc.

[0024] 3. The present invention ensures that the plug flow characteristics inside the reactor do not change while increasing the pressure, and the time characteristics of product generation are not affected by the reactor structure and pressure changes, reducing the gas backmixing phenomenon. At the same time, high-pressure micro-pulse feeding is adopted, and the pulse gas volume in a single injection process is extremely small, which does not affect the heat and mass transfer and flow characteristics inside the reactor. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0027] Figure 3 It is a comparison chart of the instantaneous pressure drop curves of the experimental value and the simulation calculation value at 1MPa;

[0028] Figure 4It is a comparison chart of the average pressure drop curves of experimental values ​​and simulation values ​​at different pressures.

[0029] Throughout the 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 1; 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 flowmeter 1; 18-high-pressure mass flowmeter 2; 19-high-pressure mass flowmeter 3; 20-high-pressure mass flowmeter 4; 21-intake pressure relief valve; 22-differential pressure detector 2; 23-high-pressure intake pipe; 24-sieve plate. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0032] See also Figure 1 A high-temperature and high-pressure micro fluidized bed thermochemical reaction measuring device of the present invention comprises a high-pressure gas distribution device, a high-pressure pulse injection device, a high-temperature and high-pressure reactor and an analysis and detection device. The high-pressure gas distribution device comprises a high-pressure gas distribution system 16, a high-pressure mass flowmeter pipeline system, an air intake pressure relief valve 21, and a high-pressure air intake pipe 23 connected in sequence along the air flow direction; the high-pressure pulse injection device comprises 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 in sequence along the air 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 is connected to the high-temperature and high-pressure reactor through the high-pressure air intake pipe 23;

[0033] The analysis and detection device includes a filter 8, a back pressure valve 7, and a mass spectrometer 6 which are sequentially connected along the air flow 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 flowmeter pipeline system includes a high-pressure mass flowmeter 17, a high-pressure mass flowmeter 18, a high-pressure mass flowmeter 19, and a high-pressure mass flowmeter 20. The air inlet ends of the high-pressure mass flowmeter 17, the high-pressure mass flowmeter 18, the high-pressure mass flowmeter 3 19, and the high-pressure mass flowmeter 4 20 are respectively connected to the high-pressure gas distribution system 16, and four different gases can be introduced according to actual needs. The air outlet ends are connected to the air intake 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 to the inside of the reactor shell 1, the bed material 2 is added to the inside of the reactor shell 1 before sealing, and is placed on the sieve plate 24, the heating furnace 3 is surrounded by the outside of the reactor shell 1, and is used to maintain the high-temperature environment inside the reactor shell 1; a metal through hole is opened on the top of the reactor shell 1, and the thermocouple 13 penetrates into the bottom of the reactor shell 1 through the metal through hole, and is used to detect the temperature inside the reactor shell 1, and 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 injection pipe 10 through alloy ferrules. After being fixed, they will not be disassembled and together form a closed cavity to ensure that the air tightness and pressure threshold remain unchanged and the stability of the internal pressure is guaranteed.

[0037] Furthermore, 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 arranged 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 arranged on the pipeline between the air intake pressure relief valve 21 and the high-pressure injection tube 23, and is connected to the differential pressure gauge 5 through a three-way valve. The pressure drop detection device is used to detect the gas pressure drop at both ends of the high-temperature and high-pressure reactor, and judge the flow state and reaction process of the gas inside the reactor based on it, such as whether the reaction pipeline is blocked, whether there is leakage, etc., and the detection result is displayed in 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 line. After the reaction product is carried by the gas into a filter 8, the pressure is released through a back pressure valve 7 and enters 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 withstand pressure is not less than 5Mpa, and the pulse pressure is 0.2-0.5Mpa higher than the internal pressure of the reactor shell; the switch of the high pressure resistant solenoid valve 14 is controlled by the computer 4 connected to the controller.

[0040] The high-pressure sample inlet pipe 10 and the high-pressure air inlet pipe 23 are set to 3mm 316 stainless steel pipes; the back pressure valve 7 has a tolerance temperature of above 200°C so that the valve structure will not be affected when insulation measures are applied in the analysis and detection device.

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

[0042] The pressure range of the reactor shell 1 is 1-4Mpa, which can ensure that the plug flow characteristics inside the gas are basically not affected by pressure changes, and the impact of pulses on the plug flow is relatively small; the sieve plate 24 has a temperature resistance set to above 1000°C, and the bed material 2 stacking height is below 20mm; the filter 8 is used to filter the bed material 2 that surges out due to pressure and flow rate changes and large particle pollutants produced after thermochemical reactions.

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

[0044] After filling the appropriate bed material, open the heating furnace 3 to raise the interior of the reactor shell 1 to an appropriate temperature; open the air intake pressure relief valve 21 to ensure that no airflow enters the reactor during the injection process; open the pulse injector 11 and add the solid reactant powder that needs to participate in the thermochemical reaction. After the pulse injector 11 is closed, open the high-pressure gas distribution system 16 to start feeding high-pressure gas, with an initial intake volume of 200 SCCM. After the pressure stabilizes, gradually tighten the back pressure valve 7, and continue to increase the pressure of the gas distribution part after the intake volume decreases, increasing by 100 SCCM each time. While the pressure inside the reactor increases, the pressure of the gas distribution part is also increased, so that the pressure of the gas distribution part is always higher than the pressure inside the reactor. When the pressure rises to the required working condition, adjust the pulse time of the high-pressure electromagnetic valve 14 to 20ms, operate the high-pressure electromagnetic valve 14 through the computer 4 to pulse, and feed the reactant into the reactor shell 1. The mass spectrometer 6 can detect the concentration and change time characteristics of the small molecule product components in the tail gas after the reaction in real time, and the collected data can be used for further analysis and calculation.

[0045] The high-temperature and high-pressure micro-fluidized bed thermochemical reaction measuring device of the present invention is suitable for measuring gas-solid thermochemical reactions of all solid fuels under a pressurized environment, including but not limited to pressurized combustion, gasification, and pyrolysis processes. The flow inside the reactor is nearly plug flow, and the time characteristics of the generated products are not destroyed, so online measurement and analysis of the products in the pressurized reaction process can be achieved.

[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 10MPa, the inside of the device can maintain a good near-plug flow state, ensuring that the time characteristics of the product during the entire reaction process will not be affected by the gas path design in the device, reducing the impact of gas backmixing on test accuracy.

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

[0048] It will be easily understood by those skilled in the art that the above description is only 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 in the protection scope of the present invention.

Claims

1. A high temperature and high pressure micro fluidized bed thermochemical reaction measurement device, characterized in that: It includes a high-pressure gas distribution device, a high-pressure pulse injection device, a high-temperature and high-pressure reactor and an analysis and 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 intake pressure relief valve (21), and a high-pressure intake pipe (23) which are sequentially connected along the air flow direction; The high-pressure pulse injection device comprises a pulse pressure relief valve (15), a high-pressure resistant electromagnetic valve (14), a pulse injector (11), and a high-pressure injection tube (10) which are sequentially connected 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 a high-pressure injection pipe (10); the high-pressure gas distribution device is connected to the high-temperature and high-pressure reactor through a high-pressure air intake pipe (23); The analysis and detection device comprises a filter (8), a back pressure valve (7), and a mass spectrometer (6) which are connected in sequence along the air flow 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).

2. A high temperature and high pressure micro fluidized bed thermochemical reaction measuring device as claimed in claim 1, characterized in that: The high-pressure mass flowmeter pipeline system comprises a high-pressure mass flowmeter 1 (17), a high-pressure mass flowmeter 2 (18), a high-pressure mass flowmeter 3 (19), and a high-pressure mass flowmeter 4 (20); the air inlet ends of the high-pressure mass flowmeter 1 (17), the high-pressure mass flowmeter 2 (18), the high-pressure mass flowmeter 3 (19), and the high-pressure mass flowmeter 4 (20) are respectively connected to the high-pressure gas distribution system (16), and the air outlet ends are connected to the air intake pressure relief valve (21).

3. A high temperature and high pressure micro fluidized bed thermochemical reaction measuring device as claimed in claim 1, characterized in that: The high-temperature and high-pressure reactor comprises 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 into the reactor shell (1) before sealing and placed on the sieve plate (24); the heating furnace (3) is surrounded by the outside of the reactor shell (1) to maintain a 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) 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. A high temperature and high pressure micro fluidized bed thermochemical reaction measuring device as claimed 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 through alloy ferrules, and together they form a closed cavity to ensure the stability of the internal pressure.

5. A high temperature and high pressure micro fluidized bed thermochemical reaction measuring device as claimed in claim 1, characterized in that: The invention also comprises a pressure drop detection device, which comprises 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 arranged 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 arranged on the pipeline between the air intake pressure relief valve (21) and the high-pressure injection tube (23), and is connected to the differential pressure gauge (5) through a three-way valve.

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

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

8. A high temperature and high pressure micro fluidized bed thermochemical reaction measuring device as claimed in claim 1, characterized in that: The high-pressure sample injection pipe (10) and the high-pressure air intake pipe (23) are configured as 3 mm 316 stainless steel pipes; the back-pressure valve (7) has a tolerable temperature of above 200° C.

9. A high temperature and high pressure micro fluidized bed thermochemical reaction measuring device as claimed in claim 1, characterized in that: The flow range of each channel of the high-pressure mass flowmeter pipeline system is up to 3000 SCCM, and the accuracy is 1 SCCM.

10. A high temperature and high pressure micro fluidized bed thermochemical reaction measuring device as claimed in claim 3, characterized in that: The pressure range of the reactor shell (1) is 1-4 MPa, the sieve plate (24) has a tolerance temperature of above 1000° C., and the stacking height of the bed material (2) is below 20 mm.

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