Coal injection device

Abstract

The utility model discloses a coal injection device, which relates to the technical field of fuming furnace structures, and comprises a coal injection pipe body and a sealing assembly for sealing the second end of the coal injection pipe body, the side wall of the coal injection pipe body is provided with a pulverized coal inlet and a compressed air inlet, and the first end of the coal injection pipe body is a pulverized coal outlet; the sealing plug assembly comprises a connecting pipe and a ball sealer, the diameter of the connecting pipe is smaller than the pipe diameter of the second end of the coal injection duct body, one end of the connecting pipe is connected with the second end, the upper pipe wall of the connecting pipe is sunken outwards to form a ball sealer receding cavity, the other end of the connecting pipe is plugged by the ball sealer, and the ball sealer can enter the ball sealer receding cavity under the action of external force; smooth working of the whole coal injection device is achieved through cooperation of the coal injection pipe body, the connecting pipe and the plugging ball, in this way, the plugging ball is plugged at the other end of the connecting pipe, and when needed, the plugging ball can be temporarily pushed to the plugging ball receding cavity, so that the coal injection device is prevented from falling off. And meanwhile, in the pushing process, the blocking ball cannot be clamped at the through connection position of the connecting pipe and the input pipe, and blocking of the coal injection pipe body is avoided.

Description

Technical Field

[0001] This utility model relates to the field of fuming furnace structure technology, and more specifically to a pulverized coal injection device. Background Technology

[0002] In existing technologies, fuming furnaces are widely used in non-ferrous metallurgical enterprises to treat various slags (especially lead-zinc slag and tin slag). During operation, fuming furnaces require pulverized coal as a reducing agent, which is blown into the furnace along with air through tuyeres. However, in actual use, because the nozzles are directly inserted into the furnace and must withstand temperatures up to 1400℃, a reaction inevitably occurs at the tuyeres, resulting in solidified slag that can clog the nozzles, affecting work progress and efficiency. To avoid this, workers typically disassemble the fuming furnace for cleaning and then reinstall it. However, this increases workload, and commonly used fuming furnaces are composed of six complex cast iron components, making them bulky and heavy. This makes installation and replacement difficult, and the limited space available at the installation site further complicates the process.

[0003] Therefore, in view of the existing problems, how to provide a pulverized coal injection device that can ensure that the solidified slag generated during the operation of the pulverized coal injection device can be cleaned up in a timely and convenient manner, and at the same time facilitate the installation of the pulverized coal injection device, is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] Therefore, this utility model provides a pulverized coal injection device that can ensure that the solidified slag generated during the operation of the pulverized coal injection device can be cleaned up in a timely and convenient manner, and at the same time facilitates the installation of the pulverized coal injection device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A pulverized coal injection device, comprising:

[0007] A pulverized coal injection pipe body, wherein a pulverized coal inlet and a compressed air inlet are provided on the side wall of the pulverized coal injection pipe body and its first end is a pulverized coal outlet;

[0008] A plugging assembly for sealing the second end of a pulverized coal injection pipe, the plugging assembly including a connecting pipe and a plugging ball, the diameter of the connecting pipe being smaller than the diameter of the second end of the pulverized coal injection pipe and one end of the connecting pipe being connected to the second end, the upper wall of the connecting pipe being recessed outward to form a camber for the plugging ball, the plugging ball being sealed at the other end of the connecting pipe, and the plugging ball being able to enter the camber for the plugging ball under the action of external force.

[0009] Through the above technical solution, this utility model provides a pulverized coal injection device. By cooperating with the pulverized coal injection pipe body, the connecting pipe, and the sealing ball, the smooth operation of the entire pulverized coal injection device is achieved. Specifically, the sealing ball seals the other end of the connection, and when needed, the sealing ball can be temporarily pushed into the sealing ball relief cavity. At the same time, during the pushing process, the sealing ball will not get stuck at the through connection between the connecting pipe and the pulverized coal injection pipe body 1, causing blockage of the pulverized coal injection pipe body. This can ensure both the airtightness and the smooth operation of the pulverized coal injection device during operation.

[0010] Preferably, the above-mentioned pulverized coal injection device further includes an output pipe, one end of which is detachably connected to the pulverized coal outlet, and the other end is connected to the fuming furnace.

[0011] Preferably, in the above-mentioned pulverized coal injection device, a connecting pipe is further included. The connecting pipe is coaxial with the pulverized coal injection pipe body and arranged horizontally, and its diameter is smaller than that of the connecting pipe. One end of the connecting pipe is connected to the pipe wall near the end of the pulverized coal injection pipe body away from the output pipe, and the other end is connected to the side wall of the connecting pipe and passes through the connecting pipe. This ensures that the aperture at the connection point between the connecting pipe and the connecting pipe is smaller than the diameter of the sealing ball, thereby enabling the sealing ball to be smoothly pushed into the sealing ball clearance cavity.

[0012] Preferably, the above-mentioned pulverized coal injection device further includes a pulverized coal input pipe, one end of which is fixed to the side wall of the pulverized coal injection pipe body corresponding to the pulverized coal inlet. This enables a continuous and stable supply of pulverized coal for pulverized coal injection operations.

[0013] Preferably, in the above-mentioned pulverized coal injection device, a compressed air input pipe is further included. One end of the compressed air input pipe is fixed to the side wall of the pulverized coal injection pipe body corresponding to the compressed air inlet, and the axial direction of the compressed air input pipe forms a preset angle with the axial direction of the pulverized coal injection pipe body. This provides compressed air for pulverized coal injection and can increase the blowing force carrying pulverized coal while reducing the scouring force on the inner wall of the pulverized coal injection pipe body.

[0014] Preferably, in the above-mentioned pulverized coal injection device, the preset angle is 30°. This ensures that the blowing force carrying pulverized coal is increased during operation, while reducing the scouring force on the inner wall of the pulverized coal injection pipe.

[0015] Preferably, in the above-mentioned pulverized coal injection device, a first connecting ring plate is fixed to the periphery of the first end of the pulverized coal injection pipe, and a second connecting ring plate is fixed to the periphery of the end of the output pipe near the pulverized coal injection pipe. The first connecting ring plate and the second connecting ring plate are bolted together. This enables rapid assembly and disassembly between the pulverized coal injection pipe and the output pipe, while also ensuring stable and secure assembly.

[0016] Preferably, in the above-mentioned pulverized coal injection device, a connecting sleeve is further included. The connecting sleeve is sleeved on one end of the output pipe near the pulverized coal injection pipe body. Third connecting ring plates are fixed to the periphery of both ends of the connecting sleeve. The third connecting ring plate near the pulverized coal injection pipe body is bolted to the first connecting ring plate and the second connecting ring plate, and the third connecting ring plate at the other end is bolted to the fuming furnace. This allows for quick disassembly of the pulverized coal injection pipe body and the output pipe from the fuming furnace.

[0017] Preferably, in the above-mentioned pulverized coal injection device, both of the third connecting ring plates are provided with waist holes. By providing waist holes, the assembly between the output pipe and the fuming furnace can be adjusted within a certain range, ensuring that the relative positions of the two can reach the ideal position or facilitating the adjustment of the positions between parts during assembly.

[0018] Preferably, in the above-mentioned pulverized coal injection device, the inner walls of both the pulverized coal injection pipe and the output pipe are fixed with linings. This effectively prevents the pulverized coal input pipe from being blown off course, thus preventing prolonged and intense erosion of the inner hole or sealing surface of the pulverized coal injection device, resulting in perforations or grooves, thereby improving the product's service life and safety reliability.

[0019] As can be seen from the above technical solution, compared with the prior art, the present invention discloses a pulverized coal injection device, which has the following beneficial effects:

[0020] 1. This utility model achieves smooth operation of the entire pulverized coal injection device through the cooperation between the pulverized coal injection pipe body, the connecting pipe, and the sealing ball. Specifically, the sealing ball is sealed at the other end of the connection, and when needed, the sealing ball can be temporarily pushed into the sealing ball relief cavity. At the same time, during the pushing process, the sealing ball will not get stuck at the through connection between the connecting pipe and the pulverized coal injection pipe body 1, causing blockage of the pulverized coal injection pipe body. This can ensure both the airtightness and the smooth operation of the pulverized coal injection device during operation.

[0021] 2. This utility model connects the pulverized coal injection pipe body and the connecting pipe through a connecting sleeve, allowing for quick disassembly of the pulverized coal injection pipe body and the output pipe from the fuming furnace. It also allows for adjustment of the assembly between the output pipe and the fuming furnace within a certain range. Attached Figure Description

[0022] 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 only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0023] Figure 1The attached figure is a structural cross-sectional view of a pulverized coal injection device provided by this utility model;

[0024] Figure 2 The attached figure is a structural cross-sectional view of a pulverized coal injection device provided by this utility model;

[0025] Figure 3 The attached figure is a cross-sectional view of the conveying pipe provided by this utility model;

[0026] Figure 4 The attached figure is a cross-sectional view of the pulverized coal injection pipe body provided by this utility model;

[0027] Figure 5 The attached figure is a cross-sectional view of the connecting sleeve provided by this utility model;

[0028] Figure 6 The attached figure is a side view of the connecting sleeve provided by this utility model.

[0029] in:

[0030] 1-Pulverized coal injection pipe body; 11-First connecting ring plate; 2-Output pipe; 21-Second connecting ring plate; 3-Connecting pipe; 4-Connecting pipe; 5-Blocking ball; 6-Pulverized coal input pipe; 7-Compressed air input pipe; 8-Connecting sleeve; 81-Third connecting ring plate; 811-Waist hole; 9-Inner lining. Detailed Implementation

[0031] 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.

[0032] Example 1:

[0033] See appendix Figure 1-6 This utility model discloses a pulverized coal injection device, including: a pulverized coal injection pipe body 1 and a sealing assembly for sealing the second end of the pulverized coal injection pipe body 1;

[0034] The side wall of the pulverized coal injection pipe 1 is provided with a pulverized coal inlet and a compressed air inlet, and its first end is a pulverized coal outlet.

[0035] The sealing assembly includes a connecting pipe 4 and a sealing ball 5. The diameter of the connecting pipe 4 is smaller than the diameter of the second end of the pulverized coal injection pipe 1, and one end of the connecting pipe 4 is connected to the second end. The upper wall of the connecting pipe 4 is recessed outward to form a relief cavity for the sealing ball. The sealing ball 5 seals the other end of the connecting pipe 4, and the sealing ball 5 can enter the relief cavity under the action of external force.

[0036] To further optimize the above technical solution, an output pipe 2 is also included. One end of the output pipe 2 is detachably connected to the pulverized coal outlet, and the other end is connected to the fuming furnace.

[0037] Specifically, the output pipe 2 is provided with a protruding section at one end that is detachably connected to the pulverized coal outlet, and the pulverized coal injection pipe body 1 is provided with a recessed section at one end near the pulverized coal outlet. The protruding section and the recessed section can be tightly abutted together and can be detachably connected.

[0038] To further optimize the above technical solution, a connecting pipe 3 is also included. The connecting pipe 3 is coaxial with the pulverized coal injection pipe body 1 and arranged horizontally. Its pipe diameter is smaller than that of the connecting pipe 4. One end of the connecting pipe 3 is connected to the pipe wall near the end of the pulverized coal injection pipe body 1 away from the output pipe 2, and the other end is connected to the side wall of the connecting pipe 4 and passes through the connecting pipe 4.

[0039] To further optimize the above technical solution, a pulverized coal input pipe 6 is also included, with one end of the pulverized coal input pipe 6 fixed to the side wall of the pulverized coal injection pipe body 1 corresponding to the pulverized coal inlet.

[0040] To further optimize the above technical solution, a compressed air input pipe 7 is also included. One end of the compressed air input pipe 7 is fixed on the side wall of the pulverized coal injection pipe body 1 corresponding to the compressed air inlet, and the axial direction of the compressed air input pipe 7 is at a preset angle to the axial direction of the pulverized coal injection pipe body 1.

[0041] To further optimize the above technical solution, the preset angle is 30°.

[0042] To further optimize the above technical solution, a first connecting ring plate 11 is coaxially fixed to the periphery of the first end of the pulverized coal injection pipe body 1, and a second connecting ring plate 21 is coaxially fixed to the periphery of the end of the output pipe 2 near the pulverized coal injection pipe body 1. The first connecting ring plate 11 and the second connecting ring plate 21 are bolted together.

[0043] It also includes a connecting sleeve 8, which is sleeved on one end of the output pipe 2 near the pulverized coal injection pipe body 1. Both ends of the connecting sleeve 8 are coaxially fixed with a third connecting ring plate 81. The third connecting ring plate 81 near the pulverized coal injection pipe body 1 is bolted to the first connecting ring plate 11 and the second connecting ring plate 21, and the third connecting ring plate 81 at the other end is bolted to the fuming furnace.

[0044] Both third connecting ring plates 81 have waist holes 811.

[0045] The inner walls of both the pulverized coal injection pipe 1 and the output pipe 2 are fixed with linings 9.

[0046] The method of use and working principle of this utility model are as follows:

[0047] Under normal circumstances, the sealing ball 5 is located at the open end of the connecting pipe 4 to seal the pulverized coal injection pipe body 1, preventing pulverized coal and compressed air from flowing out of the open end of the connecting pipe 4. However, when the pulverized coal injection pipe body 1 or the output pipe 2 becomes blocked during operation, the sealing ball 5 can be temporarily pushed into the sealing ball clearance cavity using a plugging tool. At the same time, during the pushing process, the sealing ball will not get stuck at the connection between the connecting pipe and the pulverized coal injection pipe body 1, allowing the plugging tool to properly unclog the pulverized coal injection device and ensure smooth operation. After the plugging is stopped, the sealing ball 5 can automatically fall back to the other end of the connecting pipe 4 while the connecting pipe 4 is tilted.

[0048] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to in the method section.

[0049] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A coal injection device, characterized by, include: The coal injection pipe body (1) has a coal powder inlet and a compressed air inlet on its side wall and its first end is a coal powder outlet. A plugging assembly for sealing the second end of a pulverized coal injection pipe (1), the plugging assembly includes a connecting pipe (4) and a plugging ball (5), the diameter of the connecting pipe (4) is smaller than the pipe diameter of the second end of the pulverized coal injection pipe (1) and one end of the connecting pipe (4) is connected to the second end, the upper pipe wall of the connecting pipe (4) is recessed outward to form a plugging ball clearance cavity, the plugging ball (5) is sealed at the other end of the connecting pipe (4), and the plugging ball (5) can enter the plugging ball clearance cavity under the action of external force; Output pipe (2), one end of which is detachably connected to the pulverized coal outlet and the other end is connected to the fuming furnace; A connecting pipe (3) is coaxial with the pulverized coal injection pipe body (1) and arranged horizontally, and its diameter is smaller than that of the connecting pipe (4). One end of the connecting pipe (3) is connected to the pipe wall near the end of the pulverized coal injection pipe body (1) away from the output pipe (2), and the other end is connected to the side wall of the connecting pipe (4) and passes through the connecting pipe (4). A compressed air input pipe (7) is fixed at one end to the side wall of the pulverized coal injection pipe body (1) corresponding to the compressed air inlet, and the axial direction of the compressed air input pipe (7) is at a preset angle to the axial direction of the pulverized coal injection pipe body (1).

2. A coal injection device according to claim 1, wherein It also includes a pulverized coal input pipe (6), one end of which is fixed on the side wall of the pulverized coal injection pipe body (1) corresponding to the pulverized coal inlet.

3. A coal injection device according to claim 1, wherein The preset angle is 30°.

4. A coal injection device according to claim 1, wherein A first connecting ring plate (11) is coaxially fixed to the first end of the pulverized coal injection pipe (1), and a second connecting ring plate (21) is coaxially fixed to the end of the output pipe (2) near the pulverized coal injection pipe (1). The first connecting ring plate (11) and the second connecting ring plate (21) are bolted together.

5. A coal injection device according to claim 4, wherein It also includes a connecting sleeve (8), which is sleeved on one end of the output pipe (2) near the pulverized coal injection pipe body (1). Both ends of the connecting sleeve (8) are coaxially fixed with a third connecting ring plate (81). The third connecting ring plate (81) near the pulverized coal injection pipe body (1) is bolted to the first connecting ring plate (11) and the second connecting ring plate (21), and the third connecting ring plate (81) at the other end is bolted to the fuming furnace.

6. A coal injection device according to claim 5, wherein Both of the third connecting ring plates (81) are provided with waist holes (811).

7. A coal injection device according to claim 1, wherein The inner walls of both the pulverized coal injection pipe (1) and the output pipe (2) are fixed with linings (9).

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