A sampling device and system for injecting pulverized coal

Abstract

The utility model relates to ironmaking process technical field provides a kind of sampling device and system for injecting and blowing pulverized coal, disclose a kind of sampling device for injecting and blowing pulverized coal, wherein, the both ends of device outer tube are open, one end of device outer tube is fixedly installed on the outside of lower coal pipe, the inside of device outer tube is communicated with the inside of lower coal pipe, coal powder collecting port is set up on the lateral wall of device inner tube, coal powder collecting port is communicated with the inside of device inner tube, device inner tube can coaxially insert the inside of device outer tube until coal powder collecting port extends into the inside of lower coal pipe;It also discloses a kind of sampling system for injecting and blowing pulverized coal, including pulverized coal bin, coal injection tank, lower coal pipe and the sampling device for injecting and blowing pulverized coal.The utility model can carry out irregular sampling to blast furnace injecting and blowing pulverized coal, sampling period can be adjusted according to production situation, and the sample has very strong representativeness.

Description

Technical Field

[0001] This utility model relates to the field of ironmaking process technology, and in particular to a sampling device and system for pulverized coal injection. Background Technology

[0002] Pulverized coal injection is an important measure to reduce the production cost of blast furnace ironmaking. The calorific value, composition, and moisture content of mixed pulverized coal not only directly restrict the combustion, transportation, and cost reduction of pulverized coal injection in blast furnaces, but also have a significant impact on the safety of the pulverized coal injection system. If the sampling of pulverized coal injection is not accurate enough, it will lose its guiding significance for production. The original sampling device is located at the bottom of the pulverized coal silo, which cannot provide timely and effective guidance for production. Utility Model Content

[0003] In response to the aforementioned technical problems, a sampling device and system for pulverized coal injection are provided.

[0004] The technical means adopted in this utility model are as follows: In a first aspect, a sampling device for pulverized coal injection includes an outer tube and an inner tube. The outer tube is a cylindrical structure with its axial direction parallel to a horizontal plane. Both ends of the outer tube are open. One end of the outer tube can be fixedly installed on the outer side of a lower coal pipe. When one end of the outer tube is fixedly installed on the outer side of the lower coal pipe, the interior of the outer tube is in communication with the interior of the lower coal pipe. The inner tube is a cylindrical structure with its axial direction parallel to a horizontal plane. A pulverized coal collection port is provided on the side wall of the inner tube. The pulverized coal collection port is in communication with the interior of the inner tube. When one end of the outer tube is fixedly installed on the outer side of the lower coal pipe, the inner tube can be coaxially inserted into the interior of the outer tube until the pulverized coal collection port extends into the interior of the lower coal pipe.

[0005] Furthermore, it also includes a first connecting flange, a second connecting flange, and connecting bolts; the first connecting flange has a plurality of first connecting bolt holes evenly distributed along its circumferential direction, and when one end of the outer tube of the device is fixedly installed on the outer side of the coal lower pipe, the first connecting flange is coaxial and fixedly installed on the end of the outer tube of the device away from the coal lower pipe; the second connecting flange has a plurality of second connecting bolt holes evenly distributed along its circumferential direction, and the second connecting bolt holes correspond one-to-one with the first connecting bolt holes, and the second connecting flange is coaxial and fixedly installed on one end of the inner tube of the device; a plurality of connecting bolts are provided and correspond one-to-one with the second connecting bolt holes, and the connecting bolts can be simultaneously threaded into the corresponding first connecting bolt holes and second connecting bolt holes.

[0006] Furthermore, it also includes a sealing gasket; the sealing gasket has a ring-shaped structure and can be coaxially sleeved on the outside of the inner tube of the device. When the sealing gasket is coaxially sleeved on the outside of the inner tube of the device and the inner tube of the device is coaxially inserted into the inside of the outer tube of the device, the sealing gasket is located between the first connecting flange and the second connecting flange, and the two sides of the sealing gasket can respectively fit against the first connecting flange and the second connecting flange.

[0007] Secondly, a sampling system for pulverized coal injection includes a pulverized coal silo, a pulverized coal injection canister, and a coal discharge pipe; the pulverized coal silo is a funnel-shaped structure with its axial direction perpendicular to the horizontal plane and its larger opening facing upwards and its smaller opening facing downwards; the pulverized coal injection canister is a funnel-shaped structure with its axial direction perpendicular to the horizontal plane and its larger opening facing upwards and its smaller opening facing downwards; the pulverized coal injection canister is located directly below the pulverized coal silo; the coal discharge pipe is vertically arranged, with its top end connected to the smaller opening of the pulverized coal silo and its bottom end connected to the larger opening of the pulverized coal injection canister; it also includes a sampling device for pulverized coal injection as described in any one of the first aspects; one end of the outer tube of the sampling device for pulverized coal injection is fixedly installed on the outer surface of the coal discharge pipe, and the interior of the outer tube is in communication with the interior of the coal discharge pipe; the inner tube of the sampling device for pulverized coal injection can be coaxially inserted into the interior of the outer tube until the pulverized coal collection port extends into the interior of the coal discharge pipe.

[0008] This utility model has the following advantages: 1. In this utility model, when one end of the outer tube of the device is fixedly installed on the outer side of the coal lower pipe, the inner tube of the device is coaxially inserted into the interior of the outer tube until the pulverized coal collection port extends into the interior of the coal lower pipe. If the pulverized coal collection port faces upward, the falling pulverized coal will enter the interior of the inner tube of the device through the pulverized coal collection port, thus collecting the falling pulverized coal. If the pulverized coal collection port faces downward, the falling pulverized coal will slide down along the side wall of the inner tube of the device, avoiding the impact on production due to coal accumulation. This utility model can perform irregular sampling of pulverized coal injected into the blast furnace. The sampling cycle can be adjusted according to the production situation, and the sampled items are highly representative.

[0009] 2. In this utility model, the outer tube and the inner tube of the device can be fixed together by the first connecting flange, the second connecting flange and the connecting bolts.

[0010] 3. In this utility model, the sealing gasket can prevent coal dust from overflowing from the gap between the first connecting flange and the second connecting flange. Attached Figure Description

[0011] 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.

[0012] Figure 1 This is an overall structural diagram of a sampling device for pulverized coal injection according to the present invention. Figure 2 This is an overall structural diagram of a sampling system for pulverized coal injection according to the present invention, with the pulverized coal collection port facing upwards; Figure 3 This is an overall structural diagram of a sampling system for pulverized coal injection according to the present invention, with the pulverized coal collection port facing downwards; Reference numerals in the attached diagram: 1-Outer pipe of the device; 2-Inner pipe of the device; 3-Pulverized coal collection port; 4-First connecting flange; 5-Second connecting flange; 6-Connecting bolt; 7-Pulverized coal bin; 8-Coal outlet pipe; 9-Pulverized coal injection tank. Detailed Implementation

[0013] 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, 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.

[0014] Example 1: like Figure 1 As shown, a sampling device for pulverized coal injection includes an outer tube 1 and an inner tube 2. The outer tube 1 is a cylindrical structure with its axial direction parallel to the horizontal plane. Both ends of the outer tube 1 are open. One end of the outer tube 1 can be fixedly installed on the outer surface of the lower coal pipe 8. When one end of the outer tube 1 is fixedly installed on the outer surface of the lower coal pipe 8, the interior of the outer tube 1 is connected to the interior of the lower coal pipe 8. The inner tube 2 is a cylindrical structure with its axial direction parallel to the horizontal plane. A pulverized coal collection port 3 is provided on the side wall of the inner tube 2. The pulverized coal collection port 3 is connected to the interior of the inner tube 2. When one end of the outer tube 1 is fixedly installed on the outer surface of the lower coal pipe 8, the inner tube 2 can be coaxially inserted into the interior of the outer tube 1 until the pulverized coal collection port 3 extends into the interior of the lower coal pipe 8.

[0015] Specifically, the outer pipe 1 of the device is a DN125mm steel pipe; the inner pipe 2 of the device is a DN100mm steel pipe; the inner pipe 2 of the device opens at the upper 2 / 3 of the length of the lower coal pipe 8, forming the coal powder collection port 3.

[0016] In this embodiment, the device also includes a first connecting flange 4, a second connecting flange 5, and connecting bolts 6. The first connecting flange 4 has a plurality of first connecting bolt holes evenly distributed along its circumferential direction. When one end of the outer tube 1 is fixedly installed on the outer surface of the lower coal pipe 8, the first connecting flange 4 is coaxial and fixedly installed on the end of the outer tube 1 away from the lower coal pipe 8. The second connecting flange 5 has a plurality of second connecting bolt holes evenly distributed along its circumferential direction. The second connecting bolt holes correspond one-to-one with the first connecting bolt holes. The second connecting flange 5 is coaxial and fixedly installed on one end of the inner tube 2. A plurality of connecting bolts 6 are provided, each corresponding one-to-one with a second connecting bolt hole. The connecting bolt 6 can be simultaneously threaded into its corresponding first and second connecting bolt holes.

[0017] Specifically, there are four of each of the first connecting screw hole, the second connecting screw hole, and the connecting bolt 6.

[0018] In this embodiment, a sealing gasket is also included; the sealing gasket has a ring-shaped structure and can be coaxially sleeved on the outside of the inner tube 2 of the device. When the sealing gasket is coaxially sleeved on the outside of the inner tube 2 of the device and the inner tube 2 of the device is coaxially inserted into the inside of the outer tube 1 of the device, the sealing gasket is located between the first connecting flange 4 and the second connecting flange 5, and the two sides of the sealing gasket can respectively fit against the first connecting flange 4 and the second connecting flange 5.

[0019] Example 2: like Figures 1 to 3 As shown, a sampling system for pulverized coal injection includes a pulverized coal bin 7, a pulverized coal injection canister 9, and a coal discharge pipe 8. The pulverized coal bin 7 is a funnel-shaped structure with its axial direction perpendicular to the horizontal plane and its larger opening facing upwards and its smaller opening facing downwards. The pulverized coal injection canister 9 is also a funnel-shaped structure with its axial direction perpendicular to the horizontal plane and its larger opening facing upwards and its smaller opening facing downwards. The pulverized coal injection canister 9 is located directly below the pulverized coal bin 7. The coal discharge pipe 8 is vertically arranged, with its top end connected to the smaller opening of the pulverized coal bin 7 and its bottom end connected to the larger opening of the pulverized coal injection canister 9. The system also includes a pulverized coal injection sampling device as described in any one of Embodiment 1. One end of the outer tube 1 of the pulverized coal injection sampling device is fixedly installed on the outer surface of the coal discharge pipe 8, and the interior of the outer tube 1 is connected to the interior of the coal discharge pipe 8. The inner tube 2 of the pulverized coal injection sampling device can be coaxially inserted into the interior of the outer tube 1 until the pulverized coal collection port 3 extends into the interior of the coal discharge pipe 8.

[0020] Specifically, one end of the outer tube 1 of the device is welded to the outer surface of the coal lowering pipe 8.

[0021] In addition, based on the sampled samples and the test results, guidance can be provided for adjusting blast furnace operation and optimizing the injection system.

[0022] 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 sampling device for pulverized coal injection, characterized by, Includes the outer tube (1) and the inner tube (2) of the device; The outer tube (1) of the device is a cylindrical structure with its axial direction parallel to the horizontal plane. Both ends of the outer tube (1) are open. One end of the outer tube (1) can be fixedly installed on the outer side of the coal pipe (8). When one end of the outer tube (1) is fixedly installed on the outer side of the coal pipe (8), the interior of the outer tube (1) is connected to the interior of the coal pipe (8). The inner tube (2) of the device is a cylindrical structure with its axial direction parallel to the horizontal plane. A coal powder collection port (3) is provided on the side wall of the inner tube (2). The coal powder collection port (3) is connected to the inside of the inner tube (2). When one end of the outer tube (1) of the device is fixedly installed on the outer side of the lower coal pipe (8), the inner tube (2) of the device can be coaxially inserted into the inside of the outer tube (1) of the device until the coal powder collection port (3) extends into the inside of the lower coal pipe (8).

2. A sampling device for injecting pulverized coal according to claim 1, wherein It also includes a first connecting flange (4), a second connecting flange (5), and connecting bolts (6); The first connecting flange (4) has a number of first connecting bolt holes evenly distributed along its circumferential direction. When one end of the outer tube (1) of the device is fixedly installed on the outer side of the coal pipe (8), the first connecting flange (4) is coaxial and fixedly installed on the end of the outer tube (1) of the device that is away from the coal pipe (8). The second connecting flange (5) has several second connecting screw holes evenly distributed along its circumferential direction. The second connecting screw holes correspond one-to-one with the first connecting screw holes. The second connecting flange (5) is coaxial and fixedly installed on one end of the inner tube (2) of the device. The connecting bolts (6) are provided in a plurality of ones and correspond one-to-one with the second connecting screw holes. The connecting bolts (6) can be threaded into the first connecting screw hole and the second connecting screw hole corresponding to them at the same time.

3. A sampling device for injecting pulverized coal according to claim 2, wherein It also includes sealing gaskets; The sealing gasket has a ring structure and can be coaxially sleeved on the outside of the inner tube (2) of the device. When the sealing gasket is coaxially sleeved on the outside of the inner tube (2) of the device and the inner tube (2) of the device is coaxially inserted into the inside of the outer tube (1) of the device, the sealing gasket is located between the first connecting flange (4) and the second connecting flange (5). The two sides of the sealing gasket can respectively fit with the first connecting flange (4) and the second connecting flange (5).

4. A sampling system for pulverized coal injection, comprising a pulverized coal bin (7), a pulverized coal injection canister (9), and a coal discharge pipe (8); the pulverized coal bin (7) is a funnel-shaped structure with its axial direction perpendicular to the horizontal plane and its large opening facing upward and its small opening facing downward; the pulverized coal injection canister (9) is a funnel-shaped structure with its axial direction perpendicular to the horizontal plane and its large opening facing upward and its small opening facing downward; the pulverized coal injection canister (9) is located directly below the pulverized coal bin (7); the coal discharge pipe (8) is vertically arranged; the top end of the coal discharge pipe (8) is connected to the small opening of the pulverized coal bin (7); and the bottom end of the coal discharge pipe (8) is connected to the large opening of the pulverized coal injection canister (9). characterized in that It also includes the sampling device for pulverized coal injection as described in any one of claims 1 to 3; One end of the outer tube (1) of the sampling device for pulverized coal injection is fixedly installed on the outer side of the coal feed pipe (8), and the interior of the outer tube (1) is connected to the interior of the coal feed pipe (8). The inner tube (2) of the sampling device for pulverized coal injection can be coaxially inserted into the interior of the outer tube (1) until the pulverized coal collection port (3) extends into the interior of the lower coal pipe (8).

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