Coal injection device for blast furnace

Abstract

The utility model belongs to the technical field of coal injection detection discloses a blast furnace coal injection device, including the test cabinet, its front side hinged protective door, test cabinet one side outer wall fixed installation has the injection mechanism, coal ash collection mechanism, its fixed mounting is in the test cabinet inner bottom, coal ash collection mechanism upper surface fixed installation fire ejector, test cabinet one side inner wall fixed mounting mounting seat, the detection disc is located the fire ejector right above, detection disc upper end fixed installation has temperature sensor, the utility model proposes a blast furnace coal injection device, when needing to detect the coal powder needed by injection, first the coal powder of detection is poured into the inside of injection mechanism through the hopper, then pours into the clean water in the detection disc, the coal powder is contacted after the flame and makes the flame burn more vigorous to heat the detection disc bottom, measures the heat of coal powder through the temperature sensor detection clean water temperature in the detection disc, calculates the heat value of coal powder again through the heat of detection.

Description

Technical Field

[0001] This utility model belongs to the field of pulverized coal injection detection technology, specifically a blast furnace pulverized coal injection device. Background Technology

[0002] Ironmaking relies primarily on carbon as its energy source. Pulverized coal injection (PCI) in blast furnaces is a crucial technology that utilizes pulverized coal to partially replace coke, providing a heat source, reducing agent, and carburizing agent for the blast furnace. This reduces the cost of pig iron and minimizes environmental pollution from the ironmaking process. With the rapid development of PCI technology, the demand for PCI from steel enterprises is increasing daily. However, due to rising coal prices, the scarcity of high-quality PCI is becoming increasingly apparent. To expand blast furnace fuel resources, the types of PCI (including anthracite, bituminous coal, and coking dust) are becoming more diverse, making it difficult to effectively control injection performance and effects. Therefore, optimizing the type of PCI, the injection structure, and the selection of the best mixed coal injection scheme, while ensuring basic quality requirements, are crucial for increasing the amount of pulverized coal injected, enhancing the injection effect, stabilizing ironmaking, and reducing the cost per ton of iron. To address these issues, a blast furnace PCI device is proposed. Utility Model Content

[0003] The purpose of this utility model is to solve the above problems by providing a blast furnace pulverized coal injection device, comprising:

[0004] The test cabinet has a protective door hinged to its front side. A blowing mechanism is fixedly installed on one outer wall of the test cabinet. A hopper is fixedly installed on the top of the blowing mechanism. An air pump is fixedly installed on one side of the blowing mechanism. A guide tube is fixedly installed on one inner wall of the test cabinet. The guide tube is fixedly connected to one side of the blowing mechanism.

[0005] A coal ash collection mechanism is fixedly installed at the bottom of the test cabinet. A flamethrower is fixedly installed on the upper surface of the coal ash collection mechanism. A mounting base is fixedly installed on one inner wall of the test cabinet. A detection plate is fixedly installed on one side of the mounting base. The detection plate is located directly above the flamethrower. A temperature sensor is fixedly installed on the upper end of the detection plate.

[0006] With the above technical solution, when it is necessary to test the pulverized coal required for injection, the pulverized coal to be tested is first poured into the injection mechanism through the hopper, and then clean water is poured into the test plate. During the test, the flame is emitted by the flame injector. At this time, the air pump blows the pulverized coal in the injection mechanism toward the guide tube. The pulverized coal is sprayed toward the flame through the guide tube. After the pulverized coal comes into contact with the flame, the flame burns more vigorously, thereby heating the bottom of the test plate. The calorific value of the pulverized coal is measured by detecting the temperature of the clean water in the test plate through a temperature sensor. The calorific value of the pulverized coal is then calculated based on the detected calorific value.

[0007] In a preferred embodiment, a collection cover is fixedly installed on both the left and right sides of the top of the coal ash collection mechanism, a negative pressure fan is fixedly installed at the bottom of the collection cover, and a drawer is slidably connected inside the coal ash collection mechanism.

[0008] The above technical solution produces coal ash after coal powder combustion. The falling coal ash is drawn into the drawer through a collection hood by a negative pressure fan. The coal ash is then tested by taking out the drawer, thereby calculating the grindability of the coal powder.

[0009] In a preferred embodiment, the drawer outer wall is provided with a handle groove.

[0010] The above technical solution facilitates the pulling out of the drawer by setting a handle groove.

[0011] In a preferred embodiment, an insulated box is fixedly installed on one inner wall of the test cabinet, and an industrial camera is fixedly installed inside the insulated box.

[0012] The above technical solution allows for the capture of flames during pulverized coal combustion using an industrial camera. The combustibility of the pulverized coal is determined by comparing the height and color of the flames.

[0013] In a preferred embodiment, a detection window is provided on one side of the heat insulation box.

[0014] In a preferred embodiment, a display screen is fixedly installed on one outer wall of the test cabinet, and the display screen is electrically connected to the temperature sensor, the negative pressure fan and the industrial camera.

[0015] In a preferred embodiment, the outer wall of the protective door is provided with an observation window.

[0016] In summary, due to the adoption of the above technical solutions, the beneficial effects of this utility model are: this utility model proposes a blast furnace pulverized coal injection device.

[0017] When testing the pulverized coal required for injection, the pulverized coal to be tested is first poured into the injection mechanism through the hopper, and then clean water is poured into the testing tray. During testing, the burner operates and sprays flames. At this time, the air pump operates to blow the pulverized coal in the injection mechanism towards the guide tube. The pulverized coal is sprayed into the flame through the guide tube. After the pulverized coal comes into contact with the flame, the flame burns more vigorously, thereby heating the bottom of the testing tray. The calorific value of the pulverized coal is measured by detecting the temperature of the clean water in the testing tray through a temperature sensor. The calorific value of the pulverized coal is then calculated based on the detected calorific value. After the pulverized coal burns, coal ash is produced. The negative pressure fan operates to draw the fallen coal ash into the drawer through the collection hood. The coal ash is then tested by taking out the drawer, thereby calculating the grindability of the pulverized coal. During the pulverized coal combustion process, the flame during combustion is photographed by an industrial camera. The combustibility of the pulverized coal is determined by comparing the height and color of the flame. Multiple testing items are set to test the pulverized coal. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of the test cabinet in this utility model;

[0020] Figure 3 This is a cross-sectional view of the coal ash collection mechanism in this utility model;

[0021] Figure 4 This utility model Figure 2 A magnified view of A in the middle.

[0022] The markings in the diagram are: 1-Test cabinet; 2-Protective door; 3-Purge mechanism; 4-Hopper; 5-Air pump; 6-Fly ash collection mechanism; 7-Flame blower; 8-Guide tube; 9-Mounting base; 10-Detection panel; 11-Temperature sensor; 12-Collection hood; 13-Negative pressure fan; 14-Drawer; 15-Handle groove; 16-Insulation box; 17-Detection window; 18-Industrial camera; 19-Display screen. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] The following will combine Figure 1-3 A detailed description of a blast furnace pulverized coal injection device according to an embodiment of the present invention will be provided.

[0025] Example:

[0026] A blast furnace pulverized coal injection device, comprising:

[0027] Test cabinet 1 has a protective door 2 hinged to its front side. The outer wall of the protective door 2 is provided with an observation window. A spraying mechanism 3 is fixedly installed on one side of the outer wall of test cabinet 1. A hopper 4 is fixedly installed on the top of the spraying mechanism 3. An air pump 5 is fixedly installed on one side of the spraying mechanism 3. A guide tube 8 is fixedly installed on one side of the inner wall of test cabinet 1. The guide tube 8 is fixedly connected to one side of the spraying mechanism 3. First, the coal powder to be tested is poured into the spraying mechanism 3 through the hopper 4. The air pump 5 works to blow the coal powder in the spraying mechanism 3 toward the guide tube 8. The coal powder is sprayed toward the flame through the guide tube 8. After the coal powder comes into contact with the flame, the flame burns more vigorously.

[0028] The coal ash collection mechanism 6 is fixedly installed at the bottom of the test cabinet 1. A flamethrower 7 is fixedly installed on the upper surface of the coal ash collection mechanism 6. A mounting base 9 is fixedly installed on the inner wall of one side of the test cabinet 1. A detection plate 10 is fixedly installed on one side of the mounting base 9. The detection plate 10 is located directly above the flamethrower 7. A temperature sensor 11 is fixedly installed on the upper end of the detection plate 10. The flame combustion heats the bottom of the detection plate 10. The calorific value of the coal powder is measured by detecting the temperature of the clean water in the detection plate 10 through the temperature sensor 11. The calorific value of the coal powder is then calculated based on the detected calorific value.

[0029] A heat insulation box 16 is fixedly installed on one side of the inner wall of the test cabinet 1. A detection window 17 is set on one side of the heat insulation box 16. An industrial camera 18 is fixedly installed inside the heat insulation box 16. During the combustion of pulverized coal, the flame during combustion is photographed by the industrial camera 18. The combustibility of pulverized coal is determined by comparing the height and color of the flame.

[0030] The coal ash collection mechanism 6 has collection covers 12 fixedly installed on both the top left and right sides. A negative pressure fan 13 is fixedly installed at the bottom of the collection cover 12. A display screen 19 is fixedly installed on one side of the outer wall of the test cabinet 1. The display screen 19 is electrically connected to the temperature sensor 11, the negative pressure fan 13 and the industrial camera 18. A drawer 14 is slidably connected inside the coal ash collection mechanism 6. A handle groove 15 is provided on the outer wall of the drawer 14 to facilitate pulling out the drawer 14. After the coal powder is burned, coal ash will be produced. The negative pressure fan 13 will suck the falling coal ash into the drawer 14 through the collection cover 12. By taking out the drawer 14, the coal ash can be tested, thereby calculating the grindability of the coal powder.

[0031] Working principle:

[0032] When it is necessary to test the pulverized coal required for injection, the pulverized coal to be tested is first poured into the injection mechanism 3 through the hopper 4, and then clean water is poured into the test plate 10. During the test, the flame injector 7 works to spray out flames. At this time, the air pump 5 works to blow the pulverized coal in the injection mechanism 3 towards the guide pipe 8. The pulverized coal is sprayed into the flame through the guide pipe 8. After the pulverized coal comes into contact with the flame, the flame burns more vigorously, thereby heating the bottom of the test plate 10. The calorific value of the pulverized coal is measured by detecting the temperature of the clean water in the test plate 10 through the temperature sensor 11. The calorific value of the pulverized coal is then calculated by the detected calorific value. After the pulverized coal burns, coal ash is produced. The negative pressure fan 13 works to suck the fallen coal ash into the drawer 14 through the collection hood 12. The coal ash is tested by taking out the drawer 14, so that the grindability of the pulverized coal can be calculated. During the pulverized coal combustion process, the flame during combustion is photographed by the industrial camera 18. The combustibility of the pulverized coal is determined by comparing the height and color of the flame.

[0033] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A blast furnace pulverized coal injection device, characterized in that: include: The test cabinet (1) has a protective door (2) hinged to its front side. A blowing mechanism (3) is fixedly installed on one side of the outer wall of the test cabinet (1). A hopper (4) is fixedly installed on the top of the blowing mechanism (3). An air pump (5) is fixedly installed on one side of the blowing mechanism (3). A guide tube (8) is fixedly installed on one side of the inner wall of the test cabinet (1). The guide tube (8) is fixedly connected to one side of the blowing mechanism (3). A coal ash collection mechanism (6) is fixedly installed at the bottom of the test cabinet (1). A flamethrower (7) is fixedly installed on the upper surface of the coal ash collection mechanism (6). A mounting base (9) is fixedly installed on the inner wall of one side of the test cabinet (1). A detection plate (10) is fixedly installed on one side of the mounting base (9). The detection plate (10) is located directly above ( ). A temperature sensor (11) is fixedly installed on the upper end of the detection plate (10).

2. The blast furnace pulverized coal injection device as described in claim 1, characterized in that: The coal ash collection mechanism (6) has collection covers (12) fixedly installed on the top left and right sides, and a negative pressure fan (13) fixedly installed at the bottom of the collection cover (12). A drawer (14) is slidably connected inside the coal ash collection mechanism (6).

3. A blast furnace pulverized coal injection device as described in claim 2, characterized in that: The drawer (14) has a handle groove (15) on its outer wall.

4. A blast furnace pulverized coal injection device as described in claim 1, characterized in that: Each of the test cabinets (1) has a heat insulation box (16) fixedly installed on one side of the inner wall, and an industrial camera (18) is fixedly installed inside the heat insulation box (16).

5. A blast furnace pulverized coal injection device as described in claim 4, characterized in that: A detection window (17) is provided on one side of the heat insulation box (16).

6. A blast furnace pulverized coal injection device as described in claim 1, characterized in that: A display screen (19) is fixedly installed on one side of the outer wall of the test cabinet (1). The display screen (19) is electrically connected to the temperature sensor (11), the negative pressure fan (13) and the industrial camera (18).

7. A blast furnace pulverized coal injection device as described in claim 1, characterized in that: The outer wall of the protective door (2) is provided with an observation window.

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