Experimental system and method for measuring ash formation abrasion of pulverized coal based on high-pressure oxygen-enriched combustion

Abstract

The invention belongs to the technical field of pulverized coal ash formation abrasion measurement, and particularly relates to an experimental system and method for pulverized coal ash formation abrasion measurement based on high-pressure oxygen-enriched combustion, and the experimental system comprises a gas regulation and control unit, a precise feeding device, a high-pressure combustion reactor, an ash sample collection grading system, an ash formation characteristic measurement module and a control unit; the gas regulation and control unit is used for providing high-pressure mixed gas to the high-pressure combustion reactor; the precise feeding device is used for outputting quantitative pulverized coal to the high-pressure combustion reactor; high-pressure mixed gas and pulverized coal react in the high-pressure combustion reactor, and generated high-temperature flue gas and fly ash are output to the ash sample collecting and grading system; the ash formation characteristic measuring module is used for measuring fly ash and bottom ash samples output by the ash sample collecting and grading system to obtain a particle size distribution curve and an abrasion index; the control unit is used for controlling the working states of the gas regulation and control unit, the precise feeding device and the high-pressure combustion reactor in real time.

Description

Technical Field

[0001] This invention belongs to the field of coal powder ash abrasion measurement technology, and particularly relates to an experimental system and method for measuring coal powder ash abrasion based on high-pressure oxygen-enriched combustion. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] The measurement of pulverized coal ash abrasion characteristics is a key experiment for evaluating the ability of ash particles to resist breakage and abrasion under airflow or mechanical action. It plays an important guiding role in boiler design, operational safety, material selection, and environmental control. The measurement of pulverized coal ash abrasion characteristics is a crucial link connecting the combustion process, ash characteristics, and engineering applications. Especially in high-pressure oxygen-enriched combustion systems, it is not only an indicator for evaluating ash quality, but also an important basis for optimizing combustion control, ensuring equipment safety, and achieving precise design.

[0004] Existing measurements of pulverized coal ash abrasion characteristics are mostly based on atmospheric pressure air or low oxygen concentration. The environment cannot simulate the actual operating conditions of a high-pressure oxygen-enriched boiler, such as... This leads to distortion of ash particle size distribution and wear data, thus limiting the application under normal pressure / low oxygen conditions.

[0005] In addition, traditional systems lack dynamic coordinated control of pressure, oxygen concentration, and feed rate, making them prone to exceeding the ash melting point when combustion is intensified. This causes the ash and slag to melt and agglomerate, such as in Zhundong coal. This could lead to experimental interruption or invalid data, thus posing a risk of runaway combustion temperature.

[0006] Furthermore, coal particles undergo non-uniform pyrolysis and explosion under high temperature and oxygen-rich conditions. Existing equipment cannot precisely control the degree of explosion. Excessive explosion results in ultrafine dust, while insufficient explosion results in coarse ash particles. It is difficult to obtain ash samples with the target particle size distribution, and there is a risk of uncontrollable explosion behavior.

[0007] The existing combustion device is separate from the ash characteristic analysis equipment. The fly ash collection process is easily affected by environmental interference, such as oxidation and humidity, which causes the particle size / wear test results to deviate from the actual combustion state. Summary of the Invention

[0008] To overcome the shortcomings of the prior art, the present invention provides an experimental system for measuring the ash abrasion of pulverized coal based on high-pressure oxygen-enriched combustion, which can achieve controllable, safe and intelligent explosion.

[0009] To achieve the above objectives, one or more embodiments of the present invention provide the following technical solutions: Firstly, an experimental system for measuring pulverized coal ash abrasion based on high-pressure oxygen-enriched combustion is disclosed, including: Gas control unit, precision feeding device, high-pressure combustion reactor, ash sample collection and grading system, ash formation characteristic measurement module and control unit; The gas control unit is used to supply high-pressure mixed gas to the high-pressure combustion reactor; The precision feeding device is used to output a fixed amount of pulverized coal to the high-pressure combustion reactor; In the high-pressure combustion reactor, high-pressure mixed gas and pulverized coal react, and the resulting high-temperature flue gas and fly ash are output to the ash sample collection and classification system. The ash formation characteristic measurement module measures the fly ash and bottom ash samples output by the ash sample collection and grading system to obtain the particle size distribution curve and abrasion index. The control unit is used to control the working status of the gas regulation unit, the precision feeding device, and the high-pressure combustion reactor in real time.

[0010] As a further technical solution, the gas control unit includes: a pressure sensor, an oxygen analyzer, a controller, a gas supply cylinder, a mass flow controller, a mixer, and a pressure regulating valve; The pressure sensor and oxygen analyzer provide real-time feedback of pressure and oxygen concentration to the controller. The control adopts a pressure closed-loop control method, which sends control commands to the mass flow controller, pressure regulating valve, and back pressure valve. The mass flow controller controls the gas supply bottle corresponding to the proportional solenoid valve to precisely regulate the instantaneous flow of each gas according to the oxygen concentration and total flow set by the control unit. Then, it outputs the gas to the mixer. After mixing in the mixer, the gas is output to the high-pressure combustion reactor through the pressure regulating valve and back pressure valve in sequence.

[0011] As a further technical solution, the precision feeding device includes a weighing sensor, a photoelectric sensor, a feeding controller, a carrier gas system, a vibrating feeder, a carrier gas injection ring venturi structure, a mass flow meter, and a material storage device. The weighing sensor and photoelectric sensor are used to measure the mass and feeding speed of the feed and send them to the feeding controller. The feeding controller receives the target feeding amount instruction from the central controller and obtains feedback from the weighing and speed sensors. It uses a PID algorithm to dynamically adjust the amplitude of the vibrating feeder and the flow rate of the carrier air system so that the actual feeding rate is consistent with the target value, forming a quality closed-loop control. The vibrating feeder is connected to the storage device, which feeds the material into the carrier gas injection ring venturi structure through the action of the carrier gas system. After being measured by the mass flow meter, the material is output to the high-pressure combustion reactor.

[0012] As a further technical solution, the high-pressure combustion reactor includes a reactor body with multiple inlets. Embedded thermocouples are arranged at multiple points along the axial and radial directions of the reactor body to measure the gas phase temperature field distribution. An infrared thermal imager is used for non-contact measurement of the surface temperature of coal particles and to calculate the instantaneous combustion temperature in real time. The temperature control unit receives, processes, and controls the temperature by receiving data transmitted from the embedded thermocouples and the infrared thermal imager.

[0013] As a further technical solution, the ash sample collection and grading system includes: a cyclone separator, an impact collector, and a filter membrane, employing three-stage separation to ensure the undamaged collection of fly ash and bottom ash.

[0014] As a further technical solution, the ash formation characteristic measurement module includes: a laser particle size analyzer and an abrasion analyzer. The laser particle size analyzer outputs the cumulative distribution percentile, which is a key statistical parameter describing the particle size distribution of the particle group. The abrasion analyzer is used to measure the breakage rate.

[0015] Secondly, an experimental method for measuring pulverized coal ash abrasion based on high-pressure oxygen-enriched combustion is disclosed, including: Receive coal type parameters and analyze the received coal type parameters; Set target parameters, including target values ​​for pressure, oxygen concentration, and combustion temperature; Calculate the excess air coefficient, determine the coal feed rate, control the feeding conditions, and then perform a safety check. If it is within the safe operating zone, perform a combustion test; otherwise, adjust the oxygen concentration or excess air coefficient to the safe boundary. During the combustion experiment, the temperature and pressure of the combustion are monitored in real time. If the limits are exceeded, the working state of the gas control unit is controlled. If the conditions are normal, ash samples are collected and ash formation characteristic data are output.

[0016] As a further technical solution, the feeding conditions are controlled. Before feeding, the coal powder of the required particle size is screened by an airflow sieve. The set amount of coal powder is injected within a set time to form instantaneous high-concentration combustion and enhance the thermal radiation between particles.

[0017] As a further technical solution, the combustion temperature and pressure are monitored in real time. If the limits are exceeded, the working state of the gas control unit is controlled to calculate the instantaneous combustion temperature in real time. When the instantaneous combustion temperature is greater than the set conditions, the flow rate of nitrogen is automatically increased to dilute the oxygen concentration.

[0018] As a further technical solution, when determining the coal feed rate, it is necessary to meet the coal feed rate constraints to avoid local overheating.

[0019] The above one or more technical solutions have the following beneficial effects: The technical solution of this invention ensures that the combustion temperature remains stable within a set range through a coordinated algorithm of pressure, oxygen, and feeding, preventing ash melting and achieving precise melt prevention. Within the safe temperature window, the oxygen-enriched environment enhances volatile matter extraction, inducing stress imbalance within coal particles, achieving directional bursting, and improving particle size reduction. The above achieves controllable explosion. Inert atmosphere protection is maintained throughout the entire process from combustion to measurement. (Purge) to avoid ash sample oxidation and particle size / wear data errors. This achieves data closure. Based on the safe operation zone map, it intercepts dangerous parameter combinations in real time, making it safer and more intelligent.

[0020] Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0022] Figure 1 This is a schematic diagram of the overall system according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the overall method according to an embodiment of the present invention; Figure 3 This is a diagram of the safe operating area according to an embodiment of the present invention. Detailed Implementation

[0023] It should be noted that the following detailed descriptions are exemplary and intended to provide further illustration of the invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0024] It should be noted that the terminology used herein is for the purpose of describing particular implementations only and is not intended to limit the exemplary implementations of the present invention.

[0025] Where there is no conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0026] Example 1 See appendix Figure 1 As shown, this embodiment discloses an experimental system for measuring the ash abrasion of pulverized coal based on high-pressure oxygen-enriched combustion, including: Gas control unit, precision feeding device, high-pressure combustion reactor, ash sample collection and grading system, ash formation characteristic measurement module and control unit; The gas control unit is used to supply high-pressure mixed gas to the high-pressure combustion reactor; The precision feeding device is used to output a fixed amount of pulverized coal to the high-pressure combustion reactor; In a high-pressure combustion reactor, high-pressure mixed gas and pulverized coal react, and the resulting high-temperature flue gas and fly ash are output to an ash sample collection and classification system. The ash formation characteristic measurement module measures the fly ash and bottom ash samples output by the ash sample collection and grading system to obtain the particle size distribution curve and abrasion index. The control unit is used to control the working status of the gas regulation unit, the precision feeding device, and the high-pressure combustion reactor in real time.

[0027] In one embodiment, the gas control unit includes: a pressure sensor, an oxygen analyzer, a controller, a gas supply cylinder, a mass flow controller, a mixer, and a pressure regulating valve; The pressure sensor and oxygen analyzer provide real-time feedback of pressure and oxygen concentration to the controller. The control adopts a pressure closed-loop control method, which sends control commands to the mass flow controller, pressure regulating valve, and back pressure valve. The mass flow controller controls the gas supply bottle corresponding to the proportional solenoid valve to precisely regulate the instantaneous flow of each gas according to the oxygen concentration and total flow set by the control unit. Then, it outputs the gas to the mixer. After mixing in the mixer, the gas is output to the high-pressure combustion reactor through the pressure regulating valve and back pressure valve in sequence.

[0028] In the aforementioned gas control unit, the user inputs the target operating conditions: target pressure value, target oxygen concentration value, and excess air coefficient.

[0029] The central controller calculates the required flow rate settings for O2, N2, and CO2 based on the algorithm.

[0030] The three gas supply cylinders (O2 supply cylinder, N2 supply cylinder, and CO2 supply cylinder) are precisely matched according to the set values, and the gases are uniformly mixed in the mixing chamber.

[0031] Pressure regulation: The mixed gas flows through a two-stage pressure regulating valve for initial pressure stabilization, and finally the back pressure valve performs PID closed-loop regulation to stabilize the outlet pressure at the target pressure value ± 0.5%.

[0032] Monitoring and Feedback: The oxygen analyzer measures the actual oxygen concentration in real time. If the deviation exceeds ±0.5%, the O2 channel MFC setting is fine-tuned. A pressure sensor provides real-time pressure feedback, and a PID algorithm dynamically adjusts the back pressure valve. Output: A stable, accurately composed high-pressure mixed gas is delivered to the combustion reactor.

[0033] In one implementation example, the precision feeding device includes a weighing sensor, a photoelectric sensor, a feeding controller, a carrier gas system, a vibrating feeder, a carrier gas injection ring venturi structure, a mass flow meter, and a material storage device; Weighing sensors and photoelectric sensors are used to measure the mass and feeding speed of the feed and send them to the feeding controller. The feeding controller receives the target feeding amount command from the central controller and obtains feedback from the weighing and speed sensors. It uses a PID algorithm to dynamically adjust the amplitude of the vibrating feeder and the flow rate of the carrier air system so that the actual feeding rate is consistent with the target value, forming a quality closed-loop control. The vibrating feeder is connected to the storage device, which feeds the material into the carrier gas system and injects the carrier gas into the annular venturi structure. After being metered by the mass flow meter, the material is output to the high-pressure combustion reactor.

[0034] The above-mentioned feeding device uses a vibrating feeder and a mass flow meter, and pulverized coal is injected into the reactor via nitrogen carrier gas.

[0035] During operation, the N2 pressure in the silo is maintained, and the airflow sieve is activated to ensure that the pulverized coal is ready.

[0036] The central controller issues the following instructions: Instantaneous feed rate = 2.0g, duration = 0.5s.

[0037] The feed controller instantly adjusts the vibratory feeder to its maximum amplitude, while simultaneously adjusting the carrier gas MFC to a high flow rate.

[0038] Pulverized coal is ejected by a high-speed carrier gas flow to form a high-concentration pulverized coal pulse (concentration > 500 g / m³), which supports pulse injection and simulates the rich-lean combustion of an actual boiler. The entire process is inert and protected to avoid sample variation.

[0039] The weighing sensor records the mass loss within 0.5 seconds to verify whether it is 2.0g.

[0040] Mass flow meters monitor the total flow rate of the two-phase flow to ensure stable delivery.

[0041] If the measured feed rate deviation is greater than 2%, the controller will automatically correct the vibration parameters in the next pulse.

[0042] This device works in conjunction with the gas control unit to provide precise and controllable fuel input for the high-pressure oxygen-enriched combustion reactor, which is the material basis for achieving coordinated control of the three parameters of pressure, oxygen, and feed.

[0043] In one embodiment, the high-pressure combustion reactor includes a reactor body with multiple inlets. Embedded thermocouples are arranged at multiple points along the axial and radial directions of the reactor body to measure the gas phase temperature field distribution. An infrared thermal imager is used for non-contact measurement of the surface temperature of coal particles and to calculate the instantaneous combustion temperature in real time. A temperature control unit receives, processes, and controls the temperature by receiving data transmitted from the embedded thermocouples and the infrared thermal imager.

[0044] The input of the high-pressure combustion reactor is connected to the junction of the gas control unit and the output of the precision feeding device, and the output is connected to the input of the ash sample collection system. It receives a stable high-pressure oxygen-rich atmosphere and a quantitative coal powder flow, and completes the combustion and ash formation process in a precisely controlled thermal environment, outputting high-temperature flue gas and ash particles that are truly representative.

[0045] In one implementation example, the ash collection and grading system includes a cyclone separator, an impact trap, and a filter membrane, employing three-stage separation to ensure the non-destructive collection of fly ash and bottom ash.

[0046] In one implementation example, the ash formation characteristic measurement module includes a laser particle size analyzer and an abrasion analyzer. The laser particle size analyzer outputs the cumulative distribution percentile, which is a key statistical parameter describing the particle size distribution of the particle population. The abrasion analyzer is used to measure the breakage rate.

[0047] In the actual data processing, the module functions and data flow details are shown in Table 1 below.

[0048] Table 1

[0049] This embodiment's sub-technical solution can achieve precise anti-melting: through a pressure-oxygen-feeding coordinated algorithm, it ensures that the combustion temperature remains stable at a certain level. interval, such as hour, Prevents ash melting; Explosion controllability: Within a safe temperature window, an oxygen-rich environment enhances volatile matter analysis. This induces stress imbalance within coal particles, achieving directional bursting and improving particle size reduction. The above; data closed loop: inert atmosphere protection throughout the entire process from combustion to measurement, Purging is used to prevent oxidation of the ash sample and errors in particle size / wear data. Security Intelligence: See Figure 3 As shown, dangerous parameter combinations are intercepted in real time based on the safe operation area map, such as... and .

[0050] Example 2 See appendix Figure 2 As shown, the purpose of this embodiment is to provide an experimental method for measuring the ash wear of pulverized coal based on high-pressure oxygen-enriched combustion, including: Receive coal type parameters and analyze the received coal type parameters; Set target parameters, including target values ​​for pressure, oxygen concentration, and combustion temperature; Calculate the excess air coefficient, determine the coal feed rate, control the feeding conditions, and then perform a safety check. If it is within the safe operating zone, perform a combustion test; otherwise, adjust the oxygen concentration or excess air coefficient to the safe boundary. During the combustion experiment, the temperature and pressure of the combustion are monitored in real time. If the limits are exceeded, the working state of the gas control unit is controlled. If the conditions are normal, ash samples are collected and ash formation characteristic data are output.

[0051] The feeding conditions are controlled. Before feeding, the coal powder of the required particle size is screened by an airflow sieve. The set amount of coal powder is injected within a set time to form instantaneous high-concentration combustion and enhance the heat radiation between particles.

[0052] The system monitors the combustion temperature and pressure in real time. If the temperature and pressure exceed the limits, it controls the operation of the gas control unit and calculates the instantaneous combustion temperature in real time. When the instantaneous combustion temperature is greater than the set conditions, it automatically increases the flow rate of nitrogen to dilute the oxygen concentration.

[0053] When determining the coal feed rate, it is necessary to meet the coal feed rate constraints to avoid local overheating.

[0054] The detailed calculation process is as follows: Step 1: Calculate the excess air coefficient , specific formula:

[0055] in, Low calorific value of coal ( ); Flue gas specific volume ( ,check surface); Pressure correction factor, determined experimentally, for example: Down , ; Specific heat at constant pressure of flue gas ( ).

[0056] For the first time, a pressure correction term was introduced in the calculation of the excess air coefficient. This addresses the issue of thermal equilibrium shift caused by changes in gas density under high pressure.

[0057] Step 2: Determine the coal feed rate Constraints: ; Safety fill factor ( , anti-explosion); : Coal powder burnout time (s), by and particle size Obtained by looking up the table.

[0058] By limiting the constraints, local overheating is avoided, and the combustion temperature uniformity is ensured to be ±15℃.

[0059] Step 3: Safety interlock control: Real-time calculation of instantaneous combustion temperature: , Combustion efficiency When the value is 0.95, Time: Automatically increases The flow rate dilutes the oxygen concentration.

[0060] A data processing output example, using bituminous coal as an example, is shown in Table 2.

[0061] Table 2

[0062] In this embodiment of the patent, the combustion atmosphere can be precisely controlled, achieving the following mechanism: Combustion atmosphere ( Control: Pressure Achieved through a two-stage pressure regulating valve + back pressure valve Stepless adjustment, fluctuation Oxygen concentration Three-channel high-precision mass flow controller )mix control precision .

[0063] Thermal history control: Heating rate: Dynamic adjustment of electric heater power; residence time in the critical pyrolysis zone at 800℃. Fully release volatile components; Temperature platform: at Maintain for 30 seconds to allow the fixed carbon to burn completely without melting the ash.

[0064] Feeding condition control: Particle size classification: Screening is performed using an air classifier before feeding. Pulverized coal ( ); Pulse injection: Completed internally Pulverized coal is injected to form instantaneous high-concentration combustion. ), enhance interparticle thermal radiation.

[0065] In this implementation patent, regarding the synergistic regulation of three parameters: the core objective is: in Under the premise of maximizing the volatile matter pressure inside coal particles, controllable explosion is induced.

[0066] Collaborative logic: Oxygen concentration ↑: → Volatile matter combustion rate ↑ → Particle surface temperature gradient ↑ → Internal volatile matter release rate increases dramatically; → But Too high will lead to (need compensate).

[0067] Excess air coefficient ↓: → Flue gas volume ↓ → Heat transfer efficiency ↑ → Combustion temperature ↑; → But Too low a temperature leads to oxygen deficiency, resulting in incomplete combustion of volatile components (requires...). compensate).

[0068] Coal feed ↑: → Heat release rate per unit volume ↑ → Temperature ↑; → But Excessive heat can lead to localized oxygen deficiency and slagging, requiring... and dynamic equilibrium.

[0069] Synergistic Formula

[0070] Where K: coal type coefficient, for bituminous coal... lignite extraction RO2: Oxygen reactivity, related to coal rank; Stress Index ( hour , hour ).

[0071] When pressure P increases or the target temperature difference ( When ↓, it needs to be reduced. The product is used to suppress the temperature rise while increasing... Maintain combustion intensity.

[0072] Example verification: bituminous coal( )exist , hour: like (temperature difference) ), calculated , ; If incorrect settings (Hypoxia), Actual measurement Ash sample melted; This solution utilizes collaborative control. from Down to The wear index decreased This confirms that the explosion was controllable.

[0073] Regarding the controlled bursting in this example: refers to... Under these conditions, oxygen enrichment enhancement can make The above coal particles underwent a single explosion, reducing their size to [a smaller value]. However, avoid secondary melt polymerization.

[0074] Safe operating area based on: A set of experimental data was fitted to a correlation model between the Karlovitz number (combustion stability) and the deformation temperature of the ash cone to ensure engineering feasibility.

[0075] The significance of the abrasion index: the breakage rate of ash particles under airflow impact ( Wear index It can be determined as having low wear risk, which can guide the selection of materials for boiler heating surfaces.

[0076] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. An experimental system for measuring the ash abrasion of pulverized coal based on high-pressure oxygen-enriched combustion, characterized in that, include: Gas control unit, precision feeding device, high-pressure combustion reactor, ash sample collection and grading system, ash formation characteristic measurement module and control unit; The gas control unit is used to supply high-pressure mixed gas to the high-pressure combustion reactor; The precision feeding device is used to output a fixed amount of pulverized coal to the high-pressure combustion reactor; In the high-pressure combustion reactor, high-pressure mixed gas and pulverized coal react, and the resulting high-temperature flue gas and fly ash are output to the ash sample collection and classification system. The ash formation characteristic measurement module measures the fly ash and bottom ash samples output by the ash sample collection and grading system to obtain the particle size distribution curve and abrasion index. The control unit is used to control the working status of the gas regulation unit, the precision feeding device, and the high-pressure combustion reactor in real time.

2. The experimental system for measuring pulverized coal ash abrasion based on high-pressure oxygen-enriched combustion as described in claim 1, characterized in that, The gas control unit includes: a pressure sensor, an oxygen analyzer, a controller, a gas supply cylinder, a mass flow controller, a mixer, and a pressure regulating valve; The pressure sensor and oxygen analyzer provide real-time feedback of pressure and oxygen concentration to the controller. The control adopts a pressure closed-loop control method, which sends control commands to the mass flow controller, pressure regulating valve, and back pressure valve. The mass flow controller controls the gas supply bottle corresponding to the proportional solenoid valve to precisely regulate the instantaneous flow of each gas according to the oxygen concentration and total flow set by the control unit. Then, it outputs the gas to the mixer. After mixing in the mixer, the gas is output to the high-pressure combustion reactor through the pressure regulating valve and back pressure valve in sequence.

3. The experimental system for measuring pulverized coal ash abrasion based on high-pressure oxygen-enriched combustion as described in claim 1, characterized in that, The precision feeding device includes a weighing sensor, a photoelectric sensor, a feeding controller, a carrier gas system, a vibrating feeder, a carrier gas injection ring venturi structure, a mass flow meter, and a material storage device. The weighing sensor and photoelectric sensor are used to measure the mass and feeding speed of the feed and send them to the feeding controller. The feeding controller receives the target feeding amount instruction from the central controller and obtains feedback from the weighing and speed sensors. It uses a PID algorithm to dynamically adjust the amplitude of the vibrating feeder and the flow rate of the carrier air system so that the actual feeding rate is consistent with the target value, forming a quality closed-loop control. The vibrating feeder is connected to the storage device, which feeds the material into the carrier gas injection ring venturi structure through the action of the carrier gas system. After being measured by the mass flow meter, the material is output to the high-pressure combustion reactor.

4. The experimental system for measuring pulverized coal ash abrasion based on high-pressure oxygen-enriched combustion as described in claim 1, characterized in that, The high-pressure combustion reactor includes a reactor body with multiple inlets. Embedded thermocouples are arranged at multiple points along the axial and radial directions of the reactor body to measure the gas phase temperature field distribution. An infrared thermal imager is used for non-contact measurement of the surface temperature of coal particles and to calculate the instantaneous combustion temperature in real time. The temperature control unit receives, processes, and controls the temperature by receiving data transmitted from the embedded thermocouples and the infrared thermal imager.

5. The experimental system for measuring pulverized coal ash abrasion based on high-pressure oxygen-enriched combustion as described in claim 1, characterized in that, The ash sample collection and grading system includes a cyclone separator, an impact trap, and a filter membrane, employing a three-stage separation process to ensure the undamaged collection of fly ash and bottom ash.

6. The experimental system for measuring pulverized coal ash abrasion based on high-pressure oxygen-enriched combustion as described in claim 1, characterized in that, The ash formation characteristic measurement module includes a laser particle size analyzer and an abrasion analyzer. The laser particle size analyzer outputs the cumulative distribution percentile, which is a key statistical parameter describing the particle size distribution of the particle population. The abrasion analyzer is used to measure the breakage rate.

7. An experimental method for measuring the ash wear of pulverized coal based on high-pressure oxygen-enriched combustion, characterized in that... include: Receive coal type parameters and analyze the received coal type parameters; Set target parameters, including target values ​​for pressure, oxygen concentration, and combustion temperature; Calculate the excess air coefficient, determine the coal feed rate, control the feeding conditions, and then perform a safety check. If it is within the safe operating zone, perform a combustion test; otherwise, adjust the oxygen concentration or excess air coefficient to the safe boundary. During the combustion experiment, the temperature and pressure of the combustion are monitored in real time. If the limits are exceeded, the working state of the gas control unit is controlled. If the conditions are normal, ash samples are collected and ash formation characteristic data are output.

8. The experimental method for measuring pulverized coal ash abrasion based on high-pressure oxygen-enriched combustion as described in claim 7, characterized in that, The feeding conditions are controlled. Before feeding, the coal powder of the required particle size is screened by an airflow sieve. The set amount of coal powder is injected within a set time to form instantaneous high-concentration combustion and enhance the heat radiation between particles.

9. The experimental method for measuring pulverized coal ash abrasion based on high-pressure oxygen-enriched combustion as described in claim 7, characterized in that, The system monitors the combustion temperature and pressure in real time. If the temperature and pressure exceed the limits, it controls the operation of the gas control unit and calculates the instantaneous combustion temperature in real time. When the instantaneous combustion temperature is greater than the set conditions, it automatically increases the flow rate of nitrogen to dilute the oxygen concentration.

10. The experimental method for measuring pulverized coal ash abrasion based on high-pressure oxygen-enriched combustion as described in claim 7, characterized in that, When determining the coal feed rate, it is necessary to meet the coal feed rate constraints to avoid local overheating.

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