A pulverized coal injection device for a hot blast stove

Abstract

This utility model provides a pulverized coal injection device for a hot blast stove, which can preheat the air, increase the temperature when the air and pulverized coal are mixed, and reduce the impact of air on the temperature reduction of the preheated pulverized coal. It includes a feed cylinder, a feeding pipe, a feeding hopper, a mixing cylinder, a conveying component, a material preheating component, an air inlet component, and an air preheating component. The feed cylinder has a conveying chamber inside, and a feed inlet is opened on the left side of the top of the feed cylinder. The feeding pipe is installed at the feed inlet, and a feeding hopper is installed on the top of the feeding pipe. The output end of the feed cylinder on the right side is connected to the mixing cylinder. The material preheating component is installed inside the feed cylinder. The air inlet component is connected to the left end of the mixing cylinder, and the air preheating component is installed inside the air inlet component.

Description

Technical Field

[0001] This utility model relates to the field of pulverized coal injection technology, and more specifically, to a pulverized coal injection device for a hot blast stove. Background Technology

[0002] A hot blast stove is an important thermal energy device. It plays a vital role in modern industrial production, mainly used in iron and steel smelting, non-ferrous metal smelting, ceramics production, and chemical production. During operation, pulverized coal is injected into the furnace to rapidly burn at high temperatures, generating a large amount of heat energy and thus improving the stove's temperature and efficiency. Existing technology publication number CN222226421U discloses a uniform pulverized coal injection device for a blast furnace, comprising a blast furnace body. A spray gun mechanism is fixedly connected to the bottom of the outer surface of the blast furnace body. The top of the spray gun mechanism is connected to an annular air duct. A fixed air duct is connected to the left side of the annular air duct. A pulverized coal conveying pipe is connected to the left side of the fixed air duct. An upper heating hood is fitted onto the top of the pulverized coal conveying pipe. Positioning mechanisms are bolted to the four corners of the upper heating hood. Insertion plates are inserted into the inner cavity of the positioning mechanisms, and positioning grooves are formed on opposite sides of the left and right insertion plates. However, most existing pulverized coal injection equipment for hot blast stoves can only preheat the pulverized coal injected into the hot blast stove during use. When external air enters the injection device and mixes with the preheated pulverized coal, it will lower the temperature of the pulverized coal, thereby affecting the temperature of the pulverized coal entering the hot blast stove and affecting the subsequent improvement of the combustion efficiency of the hot blast stove by the pulverized coal. Summary of the Invention

[0003] In response to the aforementioned technical problems, a hot blast stove pulverized coal injection device is provided, which can preheat air, increase the temperature when air and pulverized coal are mixed, and reduce the impact of air on the temperature reduction of preheated pulverized coal.

[0004] The technical means adopted in this utility model are as follows:

[0005] A pulverized coal injection device for a hot blast stove includes a feed cylinder, a feeding pipe, a feeding hopper, a mixing cylinder, a conveying component, a material preheating component, an air inlet component, and an air preheating component. The feed cylinder has a conveying chamber inside and a feed inlet on the top left side. The feeding pipe is installed at the feed inlet, and a feeding hopper is installed at the top of the feeding pipe. The right output end of the feed cylinder is connected to the mixing cylinder. The material preheating component is installed inside the feed cylinder. The air inlet component is connected to the left end of the mixing cylinder, and an air preheating component is installed inside the air inlet component. Pulverized coal is transported to the feeding hopper via an external conveying device, introduced into the feed cylinder through the feeding pipe, and moved within the feed cylinder by the conveying component. The material preheating component preheats the pulverized coal, which then falls downwards into the mixing cylinder. The air inlet component introduces air into the mixing cylinder, mixes with the pulverized coal, and is injected into the hot blast stove. The air preheating component preheats the air, increasing the temperature of the air when mixed with the pulverized coal and reducing the impact of air on the temperature reduction of the preheated pulverized coal.

[0006] Preferably, the conveying component includes a drive motor, a rotating shaft, spiral conveying blades, and a feed pipe. The drive motor is installed on the left side wall of the feed cylinder, and the output end of the drive motor passes through the left side wall of the feed cylinder and is connected to the rotating shaft. The rotating shaft is rotatably installed inside the feed cylinder, and spiral conveying blades are installed on the outer wall of the rotating shaft. The feed pipe is connected to the bottom right end of the feed cylinder, and the input end of the feed pipe is connected to the inside of the mixing cylinder. Coal powder is transported to the feeding hopper by external conveying equipment and introduced into the feed cylinder through the feeding pipe. The drive motor is started to drive the rotating shaft to rotate, and the rotating shaft drives the spiral conveying blades to rotate, so that the material is uniformly conveyed in the conveying chamber of the feed cylinder.

[0007] Preferably, the material preheating component includes a heating wire, a controller, and multiple insulation plates. A heating chamber is formed in the inner wall of the feed cylinder, the heating wire is installed in the heating chamber, the controller is installed at the top of the feed cylinder, and multiple insulation plates are evenly installed in the heating chamber and located outside the heating wire. The controller controls the heating wire to preheat the material inside the feed cylinder, and the insulation plates can keep the heating chamber warm and reduce heat loss.

[0008] Preferably, the air intake component includes an air blowing pipe, a blower, and 22. The air blowing pipe is installed on the left side wall of the mixing cylinder. The input end of the air blowing pipe is connected to the output end of the blower. The top of the air blowing pipe is connected to the bottom of the feed cylinder through 22. The blower is started to input air into the air blowing pipe, so that the air enters the mixing cylinder and mixes with the coal powder falling from the feed pipe and is sprayed into the hot blast furnace.

[0009] Preferably, the air preheating component includes multiple air guide plates, multiple heat conduction plates, and heating rods. The multiple air guide plates are installed inside the air blowing pipe, and an air inlet is opened in the middle of the air guide plate. The multiple heat conduction plates are alternately installed inside the air blowing pipe with the air guide plates. A heating rod is installed in the middle of the multiple heat conduction plates, and multiple air inlets are opened on the heat conduction plates. When the heating rod is activated, the heat conduction plates are heated. The air transported in the air blowing pipe comes into contact with the heat conduction plates and heating rods through the air inlets of the air guide plates, thus preheating the air. The air is transported between the multiple air guide plates and heat conduction plates, increasing the air flow distance, ensuring the heating effect of the air, improving the temperature when the air is mixed with pulverized coal, and reducing the impact of the air on the temperature reduction of the preheated pulverized coal.

[0010] Preferably, it also includes a filter box, a filter screen, and an air filter. The filter box is installed at the input end of the blower, and a filter screen is installed at the input end of the filter box. The air filter is installed inside the filter box. When the blower draws in air, it filters the air through the filter screen and the air filter to prevent impurities from clogging the pipeline.

[0011] Preferably, it also includes a nozzle and a support rod. The nozzle is installed on the right side wall of the mixing cylinder, and the support rod is installed on the top of the filter box and connected to the bottom of the feed cylinder. The nozzle blows the material mixed with pulverized coal into the hot air furnace, and the support rod fixes the filter box in place.

[0012] Compared with the prior art, the coal powder of this utility model is transported to the feeding hopper by an external conveying device, and then introduced into the feeding cylinder through the feeding pipe. The coal powder is moved in the feeding cylinder by the conveying component. The coal powder is preheated by the material preheating component. The coal powder falls downward into the mixing cylinder. The air intake component inputs air into the mixing cylinder, mixes with the coal powder, and blows it into the hot air furnace. The air preheating component can preheat the air, which increases the temperature of the air when it is mixed with the coal powder and reduces the impact of the air on the temperature reduction of the preheated coal powder. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the isometric structure of this utility model;

[0016] Figure 3 This is a three-dimensional structural diagram of the rear of this utility model;

[0017] Figure 4 This is a front cross-sectional structural diagram of the present invention;

[0018] Figure 5 This is a partial cross-sectional structural schematic diagram of the present invention;

[0019] The following are labels in the attached diagram: 1. Feed cylinder; 2. Feeding pipe; 3. Feeding hopper; 4. Drive motor; 5. Rotating shaft; 6. Screw conveyor blades; 7. Heating wire; 8. Controller; 9. Insulation plate; 10. Feeding pipe; 11. Mixing cylinder; 12. Nozzle; 13. Air blowing pipe; 14. Blower; 15. Air guide plate; 16. Heat conducting plate; 17. Heating rod; 18. Filter box; 19. Filter screen; 20. Air filter screen; 21. Support rod. Detailed Implementation

[0020] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] 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 with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this utility model or its application or use. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0023] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0024] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0025] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0026] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0027] like Figures 1 to 5 As shown, a conveying chamber is provided inside the feeding cylinder 1. A feed inlet is provided on the top left side of the feeding cylinder 1. A feeding pipe 2 is installed at the feed inlet, and a feeding hopper 3 is installed on the top of the feeding pipe 2. A drive motor 4 is installed on the left side wall of the feeding cylinder 1. The output end of the drive motor 4 passes through the left side wall of the feeding cylinder 1 and is connected to a rotating shaft 5. The rotating shaft 5 is rotatably installed inside the feeding cylinder 1. Spiral conveying blades 6 are installed on the outer wall of the rotating shaft 5. A feed pipe 10 is connected to the bottom right end of the feeding cylinder 1. The input end of the feed pipe 10 is connected to the inside of the mixing cylinder 11. A heating chamber is provided in the inner wall of the feeding cylinder 1. A heating wire 7 is installed in the heating chamber. A controller 8 is installed on the top of the feeding cylinder 1. Multiple heat insulation plates 9 are evenly installed in the heating chamber and located outside the heating wire 7. An air blowing pipe 13 is installed... On the left side wall of the mixing cylinder 11, the input end of the air blowing pipe 13 is connected to the output end of the blower 14. The top of the air blowing pipe 13 is connected to the bottom of the feed cylinder 1 via 22. Multiple air guide plates 15 are installed inside the air blowing pipe 13. An air inlet is opened in the middle of the air guide plate 15. Multiple heat conduction plates 16 are alternately installed inside the air blowing pipe 13 with the air guide plates 15. A heating rod 17 is installed in the middle of the multiple heat conduction plates 16. Multiple air inlets are opened on the heat conduction plates 16. The filter box 18 is installed at the input end of the blower 14. A filter screen 19 is installed at the input end of the filter box 18. An air filter screen 20 is installed inside the filter box 18. The nozzle 12 is installed on the right side wall of the mixing cylinder 11. The support rod 21 is installed on the top of the filter box 18 and connected to the bottom of the feed cylinder 1.

[0028] Powdered coal is transported to the feeding hopper 3 via an external conveying device, and then introduced into the feeding cylinder 1 through the feeding pipe 2. The drive motor 4 is started to drive the rotating shaft 5 to rotate, which in turn drives the spiral conveying blades 6 to rotate, so that the material is evenly conveyed in the conveying chamber of the feeding cylinder 1. The heating wire 7 is controlled by the controller 8 to preheat the material inside the feeding cylinder 1. The insulation plate 9 can keep the heating chamber warm and reduce heat loss. The blower 14 is started to input air into the air blowing pipe 13, so that the air enters the mixing cylinder 11 and mixes with the powdered coal falling from the feeding pipe 10 and is sprayed into the hot air furnace. The heating rod 17 is started to heat the heat-conducting plate 16, and the material is blown into the furnace. The air transported in the air pipe 13 comes into contact with the heat-conducting plate 16 and the heating rod 17 through the air inlet of the air guide plate 15 to preheat the air. The air is transported between multiple air guide plates 15 and heat-conducting plates 16 to increase the air flow distance, ensure the heating effect of the air, improve the temperature when the air is mixed with pulverized coal, and reduce the impact of the air on the temperature reduction of the preheated pulverized coal. When the blower 14 draws air, it is filtered through the filter screen 19 and the air filter screen 20 to prevent impurities from clogging the pipeline. The material air mixed with pulverized coal is sprayed into the hot air furnace through the nozzle 12. The filter box 18 is fixedly installed by the support rod 21.

[0029] like Figures 1 to 5As shown, this utility model discloses a pulverized coal injection device for a hot blast stove. During operation, pulverized coal is transported to the feeding hopper 3 via an external conveying device, and then introduced into the feeding cylinder 1 through the feeding pipe 2. The drive motor 4 is started, driving the rotating shaft 5 to rotate. The rotating shaft 5 drives the spiral conveying blades 6 to rotate, ensuring the material is evenly conveyed within the feeding cylinder 1's conveying chamber. The heating wire 7 is controlled by the controller 8 to preheat the material inside the feeding cylinder 1. The insulation plate 9 maintains the temperature inside the heating chamber, reducing heat loss. The blower 14 is started to blow air. Air is introduced into pipe 13, and heating rod 17 is activated to heat the heat-conducting plate 16. The air transported in the blowing pipe 13 comes into contact with the heat-conducting plate 16 and heating rod 17 through the air inlet of air guide plate 15 to preheat the air. The air is transported between multiple air guide plates 15 and heat-conducting plates 16 to increase the air flow distance. When the blower 14 draws air, it is filtered through filter screen 19 and air filter screen 20 to prevent impurities from clogging the pipeline. The material airflow mixed with coal powder is sprayed into the hot air furnace through nozzle 12.

[0030] The drive motor 4, heating wire 7, controller 8, blower 14, and heating rod 17 of the hot blast stove pulverized coal injection device of this utility model are commercially available. Technical personnel in this industry only need to install and operate them according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the 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 or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A pulverized coal injection device for a hot blast stove, characterized in that, It includes a feeding cylinder (1), a feeding pipe (2), a feeding hopper (3), a mixing cylinder (11), a conveying component, a material preheating component, an air inlet component, and an air preheating component. The feeding cylinder (1) has a conveying chamber inside. The feeding cylinder (1) has a feeding port on the top left side. The feeding pipe (2) is installed at the feeding port. The feeding hopper (3) is installed on the top of the feeding pipe (2). The output end of the feeding cylinder (1) on the right side is connected to the mixing cylinder (11). The material preheating component is installed inside the feeding cylinder (1). The air inlet component is connected to the left end of the mixing cylinder (11). The air inlet component has an air preheating component installed inside.

2. The pulverized coal injection device for a hot blast stove according to claim 1, characterized in that, The conveying components include a drive motor (4), a rotating shaft (5), a spiral conveying blade (6), and a feed pipe (10). The drive motor (4) is installed on the left side wall of the feed cylinder (1). The output end of the drive motor (4) passes through the left side wall of the feed cylinder (1) and is connected to the rotating shaft (5). The rotating shaft (5) is rotatably installed inside the feed cylinder (1). The spiral conveying blade (6) is installed on the outer wall of the rotating shaft (5). The feed pipe (10) is connected to the bottom right end of the feed cylinder (1). The input end of the feed pipe (10) is connected to the inside of the mixing cylinder (11).

3. The pulverized coal injection device for a hot blast stove according to claim 2, characterized in that, The material preheating component includes a heating wire (7), a controller (8), and multiple insulation plates (9). A heating chamber is provided in the inner wall of the feed cylinder (1). The heating wire (7) is installed in the heating chamber. The controller (8) is installed on the top of the feed cylinder (1). Multiple insulation plates (9) are evenly installed in the heating chamber and located outside the heating wire (7).

4. The pulverized coal injection device for a hot blast stove according to claim 1, characterized in that, The air intake components include an air blowing pipe (13), a blower (14) and 22. The air blowing pipe (13) is installed on the left side wall of the mixing cylinder (11). The input end of the air blowing pipe (13) is connected to the output end of the blower (14). The top of the air blowing pipe (13) is connected to the bottom of the feed cylinder (1) through 22.

5. A pulverized coal injection device for a hot blast stove according to claim 4, characterized in that, The air preheating component includes multiple air guide plates (15), multiple heat conduction plates (16), and heating rods (17). Multiple air guide plates (15) are installed inside the air blowing pipe (13), and an air inlet is provided in the middle of the air guide plate (15). Multiple heat conduction plates (16) are alternately installed inside the air blowing pipe (13) with the air guide plates (15). A heating rod (17) is installed in the middle of the multiple heat conduction plates (16), and multiple air inlets are provided on the heat conduction plates (16).

6. A pulverized coal injection device for a hot blast stove according to claim 4, characterized in that, It also includes a filter box (18), a filter screen (19) and an air filter screen (20). The filter box (18) is installed at the input end of the blower (14), the filter screen (19) is installed at the input end of the filter box (18), and the air filter screen (20) is installed inside the filter box (18).

7. A pulverized coal injection device for a hot blast stove according to claim 6, characterized in that, It also includes a nozzle (12) and a support rod (21). The nozzle (12) is installed on the right side wall of the mixing cylinder (11), and the support rod (21) is installed on the top of the filter box (18) and connected to the bottom of the feed cylinder (1).

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