Coal slurry atomization performance testing device for coal water slurry process burner

Abstract

A coal slurry atomization performance testing device for a coal water slurry process burner comprises a four-channel coal water slurry process burner, a coal water slurry simulation liquid conveying system, a gas conveying system, a three-way mixer and an atomization form shooting area. An outlet of the coal water slurry simulation liquid conveying system and an outlet of the gas conveying system are connected with a liquid inlet and a gas inlet of the three-way mixer respectively, a mixed liquid outlet of the three-way mixer is connected with an outer coal slurry channel of the four-channel coal water slurry process burner through a pipeline, and the four-channel coal water slurry process burner is installed in an atomization form shooting area. And high-speed photographic equipment is mounted in the atomization form shooting area and is used for recording the atomization form of the nozzle of the four-channel coal water slurry process burner. According to the utility model, the cold-state atomization effect of the coal slurry outside the four-channel coal water slurry process burner under different gas flows can be tested, and parameter optimization is provided for improving the atomization effect of the coal slurry outside the burner.

Description

Technical Field

[0001] This utility model relates to the field of coal chemical technology, and in particular to a device for testing the coal slurry atomization performance of burners in a coal-water slurry process. Background Technology

[0002] Existing coal-water slurry burners employ a four-channel design. These four channels, from the inside out, consist of a central oxygen channel, an inner coal slurry channel, an epoxy channel, and an outer coal slurry channel. The purpose of this four-channel design is to isolate the oxygen in the epoxy channel from the coal slurry in the outer channel, preventing the oxygen from reacting with the syngas flowing back into the gasifier and generating high temperatures that could lead to burner thermal fatigue damage. However, due to the low flow velocity of the coal-water slurry entering the outer channel (approximately 1 m / s), the angle of entry into the burner is too small. This prevents the high-speed oxygen in the epoxy channel from impacting the slurry at a large angle, resulting in poor atomization, low conversion rate, high residual carbon content in the slag, and low effective gas content in the coal-water slurry ejected from the burner nozzle.

[0003] Therefore, technicians conceived of a solution that would increase the flow rate and gas content of the coal-water slurry by introducing high-pressure gas into the coal-water slurry and then into the outer coal slurry channel of the coal-water slurry burner. However, the existing technology lacks a testing device to match the four-channel coal-water slurry burner, making it impossible to determine the relationship between the gas flow rate into the coal-water slurry and the atomization pattern of the coal-water slurry ejected from the burner. Furthermore, during gasification operation, the atomization pattern of the coal-water slurry dispensed from the burner cannot be directly observed; it can only be indirectly determined through gasification operating parameters, resulting in long commissioning cycles and high commissioning costs. Utility Model Content

[0004] This invention addresses the shortcomings of existing technologies by providing a convenient and rapid device for testing the atomization performance of coal slurry burners in coal slurry processes, thereby determining the optimal pressure and flow rate of gas introduced into the coal slurry.

[0005] To achieve the above objectives, this utility model first proposes a coal slurry atomization performance testing device for a coal-water slurry burner, comprising a four-channel coal-water slurry burner, a coal-water slurry simulated liquid delivery system, a gas delivery system, a three-way mixer, and an atomization pattern imaging area. The outlets of the coal-water slurry simulated liquid delivery system and the gas delivery system are respectively connected to the liquid inlet and gas inlet of the three-way mixer. The mixed liquid outlet of the three-way mixer is connected to the outer coal slurry channel of the four-channel coal-water slurry burner through a pipeline. The four-channel coal-water slurry burner is installed in the atomization pattern imaging area, where a high-speed photography device is installed to record the atomization pattern of the four-channel coal-water slurry burner nozzle.

[0006] In this embodiment, the three-way mixer is a Y-type three-way mixer.

[0007] In this embodiment, the nozzle of the four-channel coal-water slurry process burner faces vertically downward, and the high-speed photography equipment is arranged on the side of the nozzle with the nozzle as the center.

[0008] In this embodiment, the high-speed photography device is a high-speed camera or a high-speed video camera.

[0009] In this embodiment, the coal-water slurry simulation liquid transportation system includes a coal-water slurry simulation liquid storage tank, a centrifugal pump, a pump pressure gauge, and a first flow meter. The outlet of the coal-water slurry simulation liquid storage tank is equipped with a storage tank outlet valve, which is connected to the suction end of the centrifugal pump through a pipeline. The centrifugal pump is connected to the liquid inlet of a three-way mixer through a pipeline. The centrifugal pump is equipped with a pump outlet valve and a pump return valve. The pump return valve is used to regulate the flow rate and pressure of the pump. A pump pressure gauge is installed at the outlet of the centrifugal pump, and a first flow meter is installed on the pipeline between the centrifugal pump and the three-way mixer.

[0010] In this embodiment, the gas delivery system includes a high-pressure gas source. A gas source outlet valve is installed at the outlet of the high-pressure gas source. The gas source outlet valve is connected to the gas inlet of a three-way mixer via a pipeline. A gas source pressure gauge is installed at the outlet of the gas source outlet valve. A second flow meter and a check valve are installed sequentially on the pipeline connecting the gas source and the three-way mixer. The check valve allows gas to flow from the gas source to the three-way mixer.

[0011] In this embodiment, a hand valve is installed on the outer coal slurry channel inlet of the four-channel coal-water slurry process burner, and the mixed liquid outlet of the three-way mixer is connected to the hand valve inlet through a pipeline.

[0012] With the above structure, this utility model has the following advantages:

[0013] 1. The coal-water slurry simulation liquid delivery system of this device can adjust the flow rate and pressure of the coal-water slurry simulation liquid, and the gas delivery system can adjust the pressure and flow rate of the gas, thereby effectively simulating the actual working conditions of coal-water slurry and providing real and reliable conditions for testing. The three-way mixer can fully mix the gas with the coal-water slurry simulation liquid. In conjunction with the four-channel coal-water slurry process burner set in the atomization pattern shooting area, it can realistically simulate the increase of the flow rate of coal-water slurry entering the outer coal slurry channel. By changing the gas pressure and flow rate, the cold atomization pattern of the coal slurry outside the four-channel coal-water slurry process burner under different gas flow rates can be tested. This allows for quick and easy determination of the relationship between the gas pressure, flow rate and atomization pattern in the coal-water slurry, providing guidance for parameter optimization in actual production.

[0014] 2. This device records the atomization morphology of the burner nozzles in the four-channel coal-water slurry process under different gas pressures and flow rates using high-speed photography equipment, and compares it with the actual required atomization morphology. This allows us to determine the gas pressure and flow rate corresponding to the atomization morphology required for actual production, providing accurate reference data for the operation of the gasifier in actual production. At the same time, through testing, we can establish a quantitative relationship between gas flow rate and atomization effect, guiding the optimization of actual production parameters.

[0015] 3. When this device is applied to actual production based on the test data, the coal-water slurry can achieve the best atomization effect, and can mix and react with oxygen on the largest area, thereby increasing the effective gas production, increasing the carbon conversion rate, reducing the residual carbon in the slag, and ultimately achieving the goal of reducing costs and increasing efficiency.

[0016] 4. The structure of the coal-water slurry simulation liquid delivery system and the gas delivery system of this device is clear. The flow rate and pressure can be easily adjusted through pump return valves, various valves and flow meters, etc. A manual valve is installed at the inlet of the coal slurry channel on the outside of the four-channel coal-water slurry process burner to facilitate the control of the mixed liquid entering. The height of the atomization pattern shooting area is set at 10 meters. The four-channel coal-water slurry process burner is arranged vertically with the nozzle facing downward, which facilitates the observation of the atomization pattern and helps to obtain accurate test data.

[0017] 4. Since the atomization index of water and coal-water slurry is similar, water is used as the simulated coal-water slurry in this device. The water medium is used to replace the coal slurry to achieve safe testing and reduce the test risk.

[0018] 5. This device has low setup cost, short testing cycle, and strong repeatability, which improves the economy and practicality of the device while ensuring the testing effect.

[0019] In summary, this utility model has low construction cost, short testing cycle, and strong repeatability. It can test the cold atomization effect of coal slurry outside the burner in a four-channel coal-water slurry process under different gas flow rates, providing parameter optimization for improving the atomization effect of coal slurry outside the burner, achieving the best burner atomization effect, improving carbon conversion rate, and achieving the goal of cost reduction and efficiency improvement. It can also evaluate the atomization effect of old burners after use and quantitatively assess and optimize process parameters for the atomization effect of new burners before leaving the factory. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] In the attached diagram: 1. Atomization pattern shooting area; 2. Water-coal slurry simulation liquid storage tank; 3. Storage tank outlet valve; 4. Pump return valve; 5. Centrifugal pump; 6. Pump pressure gauge; 7. Pump outlet valve; 8. First flow meter; 9. Three-way mixer; 10. High-pressure gas source; 11. Gas source pressure gauge; 12. Gas source outlet valve; 13. Second flow meter; 14. Check valve; 15. Manual valve; 16. Four-channel water-coal slurry process burner; 17. High-speed photography equipment. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0024] like Figure 1 As shown, a coal slurry atomization performance testing device for a coal slurry burner in a coal-water slurry process includes a four-channel coal slurry burner 16, a coal slurry simulated liquid delivery system, a gas delivery system, a three-way mixer 9, and an atomization morphology imaging area 1.

[0025] The outlets of the coal-water slurry simulation liquid conveying system and the gas conveying system are connected to the liquid inlet and gas inlet of the three-way mixer 9, respectively. The liquid outlet of the three-way mixer 9 is connected to the outer coal slurry channel of the four-channel coal-water slurry process burner 16 through a pipeline. The four-channel coal-water slurry process burner 16 is installed in the atomization pattern shooting area 1. The nozzle of the four-channel coal-water slurry process burner 16 is vertically downward. A high-speed photography device 17 is also installed in the atomization pattern shooting area 1 to record the atomization pattern of the nozzle of the four-channel coal-water slurry process burner 16.

[0026] The coal-water slurry simulation liquid delivery system is used to supply coal-water slurry simulation liquid to the three-way mixer 9. At the same time, the coal-water slurry simulation liquid delivery system can adjust the flow rate and pressure of the coal-water slurry simulation liquid to simulate the actual working conditions of coal-water slurry.

[0027] The gas delivery system is used to supply pressurized gas to the three-way mixer 9. At the same time, the gas delivery system can also adjust the pressure and flow rate of the gas.

[0028] The three-way mixer 9 thoroughly mixes the gas with the simulated coal-water slurry, and then introduces the mixed solution into the outer coal slurry channel of the four-channel coal-water slurry burner 16.

[0029] The high-speed photography device 17 is a high-speed camera or high-speed video camera. The high-speed photography device 17 will record the atomization pattern of the gas at the nozzle under different pressures and flow rates, and then compare it with the atomization pattern required for the actual working conditions, so as to obtain the optimal gas pressure and flow rate. This provides accurate reference data for creating the best coal slurry atomization effect for the actual operation of the device, so that the coal-water slurry can achieve the best atomization effect in actual production. The coal-water slurry can mix with oxygen to the maximum area to produce a reaction, increase the effective gas, increase the carbon conversion rate, reduce the residual carbon in the slag, and achieve cost reduction and efficiency improvement.

[0030] like Figure 1 As shown, the simulated coal-water slurry delivery system further includes a simulated coal-water slurry storage tank 2, a centrifugal pump 5, a pump pressure gauge 6, and a first flow meter 8. A storage tank outlet valve 3 is installed at the outlet of the simulated coal-water slurry storage tank 2. The storage tank outlet valve 3 is connected to the suction end of the centrifugal pump 5 via a pipeline. The centrifugal pump 5 is connected to the liquid inlet of a three-way mixer 9 via a pipeline. The outlet end of the centrifugal pump 5 is connected to the three-way mixer. A pump return valve 4 and a pump outlet valve 7 are respectively installed at the two outlets of the three-way mixer. The outlet end of the pump return valve 4 is connected to the simulated coal-water slurry delivery system via a pipeline. The simulated liquid storage tank 2 is connected, and the pump return valve 4 returns a portion of the fluid from the pump outlet to the suction end of the simulated liquid storage tank 2 via a bypass, thereby regulating the flow and pressure of the centrifugal pump 5. The outlet end of the pump outlet valve 7 is connected to the liquid inlet of the three-way mixer 9 via a pipeline. A pump pressure gauge 6 for monitoring the outlet pressure of the centrifugal pump is also installed on the outlet end of the centrifugal pump 5. A first flow meter 8 for monitoring the flow in the pipeline is installed on the pipeline between the centrifugal pump 5 and the three-way mixer 9. The first flow meter 8 is a rotor flow meter.

[0031] The gas delivery system includes a high-pressure gas source 10, an outlet valve 12 installed at the outlet of the high-pressure gas source 10, and the outlet valve 12 connected to the gas inlet of a three-way mixer 9 via a pipeline. A gas source pressure gauge 11 for monitoring the outlet pressure of the gas source is installed at the outlet of the outlet valve 12. A second flow meter 13 and a check valve 14 are installed sequentially on the pipeline connecting the high-pressure gas source 10 and the three-way mixer 9. The second flow meter 13 is used to monitor the gas flow rate in the pipeline, and the check valve 14 ensures that the gas can only flow from the gas source to the three-way mixer 9. The second flow meter 13 is a rotor flow meter.

[0032] A hand valve 15 is installed on the outer coal slurry channel inlet of the four-channel coal-water slurry process burner 16. The outlet of the three-way mixer 9 is connected to the inlet of the hand valve 15 through a pipeline. In this embodiment, the atomization pattern shooting area is 10 meters high. The four-channel coal-water slurry process burner 16 is arranged vertically with the nozzle facing downward to facilitate the observation of the atomization pattern.

[0033] The usage of this device is further described below with examples.

[0034] In this embodiment, water is used as the simulated coal-water slurry. Normal temperature tap water is introduced into the simulated coal-water slurry storage tank 2 to reach full level. The storage tank outlet valve 3 and pump return valve 4 are opened, the centrifugal pump 5 is started, the pump return valve 4 is partially closed, and the pump outlet valve 7 is opened. The outlet pressure of the centrifugal pump 5 is monitored by the pump pressure gauge 6, and the outlet flow rate of the centrifugal pump 5 is monitored by the first flow meter 8. The pipeline pressure is adjusted to 1.2 MPaG and the flow rate is adjusted to 10 m³ / s using the pump return valve 4 and pump outlet valve 7. 3 / h, then the liquid enters the three-way mixer 9;

[0035] The gas originates from a high-pressure gas source 10. In this embodiment, the high-pressure gas source 10 is a gas cylinder. A second flow meter 13 monitors the flow rate at the outlet of the gas cylinder, and a gas source pressure gauge 11 monitors the pressure at the outlet of the gas cylinder. The gas source outlet valve 12 is adjusted to set the flow rate at the outlet of the high-pressure gas source 10 to 1.3 MPaG, and the pressure at the outlet of the high-pressure gas source 10 is controlled to be X Nm. 3 / h, where X represents the number of different values ​​that can be selected for final comparison based on test requirements. In this embodiment, X is 300 Nm. 3 / h, 500Nm 3 / h, 700Nm 3 / h, 900Nm 3 / h, 1100Nm 3 / h, 1300 Nm 3 / h or 1500Nm 3 / h, and then the pressurized gas enters the three-way mixer 9 through the one-way valve 14;

[0036] The three-way mixer 9 fully mixes the pressurized gas and water, and then enters the four-channel coal-water slurry burner 16 through the hand valve 15. The water is sprayed at the burner opening and atomized by the gas. The high-speed photography equipment 17 in the atomization pattern shooting area 1 is used to observe the water atomization pattern at the burner opening and to take pictures and videos to record it.

[0037] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made under the concept of this utility model using the contents of this utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A device for testing the coal slurry atomization performance of a burner in a coal-water slurry process, characterized in that, The device includes a four-channel coal-water slurry process burner (16), a coal-water slurry simulation liquid delivery system, a gas delivery system, a three-way mixer (9), and an atomization pattern shooting area (1). The outlets of the coal-water slurry simulation liquid delivery system and the gas delivery system are connected to the liquid inlet and gas inlet of the three-way mixer (9), respectively. The mixed liquid outlet of the three-way mixer (9) is connected to the outer coal slurry channel of the four-channel coal-water slurry process burner (16) through a pipeline. The four-channel coal-water slurry process burner (16) is installed in the atomization pattern shooting area (1). A high-speed photography device (17) is installed in the atomization pattern shooting area (1). The high-speed photography device (17) is used to record the atomization pattern of the nozzle of the four-channel coal-water slurry process burner (16).

2. The coal slurry atomization performance testing device for burners in coal-water slurry processes according to claim 1, characterized in that: The three-way mixer (9) is a Y-type three-way.

3. The coal slurry atomization performance testing device for burners in coal-water slurry processes according to claim 1, characterized in that: The nozzle of the four-channel coal-water slurry process burner (16) is vertically downward, and the high-speed photography equipment (17) is arranged on the side of the nozzle with the nozzle as the center.

4. The coal slurry atomization performance testing device for burners in coal-water slurry processes according to claim 1 or 3, characterized in that: The high-speed photography equipment (17) is a high-speed camera or a high-speed video camera.

5. The coal slurry atomization performance testing device for burners in coal-water slurry processes according to claim 1, characterized in that: The coal-water slurry simulation liquid transportation system includes a coal-water slurry simulation liquid storage tank (2), a centrifugal pump (5), a pump pressure gauge (6), and a first flow meter (8). The coal-water slurry simulation liquid storage tank (2) is equipped with a storage tank outlet valve (3). The storage tank outlet valve (3) is connected to the suction end of the centrifugal pump (5) through a pipeline. The outlet end of the centrifugal pump (5) is connected to the liquid inlet of the three-way mixer (9) through a pipeline. The centrifugal pump (5) is equipped with a pump outlet valve (7) and a pump return valve (4). The pump return valve (4) is used to regulate the flow rate and pressure of the pump. The centrifugal pump (5) is equipped with a pump pressure gauge (6) at the outlet end. The first flow meter (8) is installed on the pipeline between the centrifugal pump (5) and the three-way mixer (9).

6. The coal slurry atomization performance testing device for burners in a coal-water slurry process according to claim 1, characterized in that: The gas delivery system includes a high-pressure gas source (10), and a gas source outlet valve (12) is installed at the outlet of the high-pressure gas source (10). The gas source outlet valve (12) is connected to the gas inlet of the three-way mixer (9) through a pipeline. A gas source pressure gauge (11) is installed at the outlet of the gas source outlet valve (12). A second flow meter (13) and a one-way valve (14) are installed in sequence on the pipeline connecting the high-pressure gas source (10) and the three-way mixer (9). The one-way valve (14) allows gas to flow from the gas source to the three-way mixer (9).

7. The coal slurry atomization performance testing device for burners in coal-water slurry processes according to claim 1, characterized in that: A hand valve (15) is installed on the outer coal slurry channel inlet of the four-channel coal-water slurry burner (16), and the mixed liquid outlet of the three-way mixer (9) is connected to the inlet of the hand valve (15) through a pipeline.

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