Novel coal mill outlet anti-abrasion temperature suite

Abstract

The utility model relates to the technical field of coal mill thermometer protection, and provides a novel coal mill outlet anti-abrasion temperature suite which comprises a mounting flange, a fixed flange, a high-temperature-resistant gasket, a temperature measuring element and an anti-abrasion rod. The mounting flange is mounted on the fixed flange, and the high-temperature-resistant gasket is arranged between the mounting flange and the fixed flange; a first mounting hole and a second mounting hole are formed in the mounting flange at an interval, the first mounting hole and the second mounting hole are linearly formed, the anti-abrasion rod is inserted into the coal mill outlet pipe through the first mounting hole, the temperature measuring element is inserted into the coal mill outlet pipe through the second mounting hole, and the anti-abrasion rod is located under the temperature measuring element. The width of the anti-abrasion rod is larger than or equal to that of the temperature measuring element. The coal powder in the outlet pipe of the coal mill is blocked by using the anti-wear rod, so that a shunting effect is achieved, the coal powder is prevented from directly impacting the temperature measuring element, a good protection effect is achieved on the temperature measuring element, and meanwhile, the temperature monitoring of the temperature measuring element is not influenced.

Description

Technical Field

[0001] This application belongs to the field of coal mill thermometer protection technology, and more specifically, it relates to a new type of coal mill outlet anti-wear temperature kit. Background Technology

[0002] The coal mill is the core equipment of the pulverizing system, and the outlet air-coal mixing temperature is an important monitoring parameter during the operation of the coal mill, which directly affects the system's safety, combustion efficiency and environmental performance.

[0003] Raw coal generally contains moisture, requiring hot drying air as a medium during pulverization. Insufficient temperature can cause coal powder to clump and clog pipes; excessive temperature can lead to spontaneous combustion of coal powder or even an explosion of the pulverizing system. The air-coal mixing temperature at the outlet of a coal mill in a thermal power plant is generally controlled between 70-90℃, with the specific range varying depending on the type of coal fed.

[0004] Monitoring the temperature of the air-coal mixture at the coal mill outlet is crucial. Therefore, the DCS (Distributed Control System) for the air-coal mixture temperature at the outlet of a single coal mill has three measuring points, with three wear-resistant armored thermal resistors installed on the mill outlet pipe as temperature sensing elements. However, due to the long-term operation of the coal mill and the scouring effect of hot air and coal dust, the temperature sensing elements still experience frequent wear and tear. This situation seriously affects the safe operation of the pulverizing system.

[0005] The temperature measuring element for the air-coal mixture at the coal mill outlet is severely worn. The wear-resistant properties of the element itself are insufficient to support its normal service life. Furthermore, frequent replacement of the element would result in a waste of human resources and excessively high production costs. Utility Model Content

[0006] In view of the shortcomings of the prior art, the purpose of this application is to provide a new type of anti-wear temperature kit for coal mill outlet, which has the advantages of easy replacement and protection of temperature measuring elements.

[0007] To achieve the above objectives, the technical solution adopted in this application is as follows: A novel anti-wear temperature kit for a coal mill outlet is provided, which is installed on the coal mill outlet pipe. The kit includes: an installation flange, a fixed flange, a high-temperature resistant gasket, a temperature sensing element, and an anti-wear rod. The fixed flange is fixed to the coal mill outlet pipe, the installation flange is installed on the fixed flange, and the high-temperature resistant gasket is disposed between the installation flange and the fixed flange. The installation flange has a first installation hole and a second installation hole spaced apart, with at least one second installation hole. The first and second installation holes are arranged in a straight line. The anti-wear rod is inserted into the coal mill outlet pipe through the first installation hole, and the temperature sensing element is inserted into the coal mill outlet pipe through the second installation hole. The coal powder in the coal mill outlet pipe flows from bottom to top. The anti-wear rod is located directly below the temperature sensing element, and the width of the anti-wear rod is greater than or equal to the width of the temperature sensing element.

[0008] In one embodiment, the anti-wear rod is made of stainless steel.

[0009] In one embodiment, the cross-section of the anti-wear rod is square.

[0010] In one embodiment, the side of the anti-wear rod is set at 45° to the horizontal plane.

[0011] In one embodiment, a first sleeve and a second sleeve are welded to the outer side of the mounting flange, respectively. The shape of the through hole in the first sleeve is adapted to the anti-wear rod, and the shape of the through hole in the second sleeve is adapted to the temperature measuring element. The first sleeve and the second sleeve are respectively provided with a locking screw.

[0012] In one embodiment, the end of the anti-wear rod is provided with a handle.

[0013] In one embodiment, the high-temperature resistant gasket is provided with interference through holes that are interference fit with the anti-wear rod and the temperature measuring element.

[0014] In one embodiment, the mounting flange and the fixing flange are secured together by at least four hexagonal bolts.

[0015] The beneficial effects of the novel anti-wear temperature kit for coal mill outlet provided in this application are as follows: by setting an anti-wear rod directly below the temperature measuring element, the anti-wear rod blocks the coal powder in the coal mill outlet pipe, thereby diverting the flow and preventing the coal powder from directly impacting the temperature measuring element, thus providing good protection for the temperature measuring element, while not affecting the temperature monitoring of the temperature measuring element. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, 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 some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 An exploded structural diagram of the novel anti-wear temperature kit for coal mill outlet provided in this application embodiment;

[0018] Figure 2 This is a front structural diagram of the mounting flange, fixing flange, and high-temperature resistant gasket in the novel coal mill outlet anti-wear temperature kit provided in this application embodiment.

[0019] The following are the labeling elements in the figure:

[0020] 1. Mounting flange; 2. Fixing flange; 3. High-temperature gasket; 4. Temperature sensing element; 5. Mounting through hole; 6. Coal mill outlet pipe; 7. Hex bolt; 8. Anti-wear rod; 9. Handle; 10. First sleeve; 11. Second sleeve; 12. Non-through threaded hole; 13. Threaded through hole; 14. Anchor screw; 15. Interference fit through hole. Detailed Implementation

[0021] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0022] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0023] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and 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. Therefore, they should not be construed as limitations on this application.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0025] like Figures 1-2 As shown, the novel anti-wear temperature kit for the coal mill outlet provided in this application embodiment will now be described. This novel anti-wear temperature kit for the coal mill outlet is installed on the coal mill outlet pipe 6 and includes: a mounting flange 1, a fixing flange 2, a high-temperature resistant gasket 3, a temperature sensing element 4, and an anti-wear rod 8. The pulverized coal in the coal mill outlet pipe 6 flows from bottom to top.

[0026] The mounting flange 1, the fixing flange 2, and the high-temperature gasket 3 are all rectangular structures. The fixing flange 2 is welded and fixed to the outside of the coal mill outlet pipe 6. The four corners of the fixing flange 2 are each provided with non-through-hole threads. The four corners of the mounting flange 1 and the high-temperature gasket 3 are each provided with mounting through holes 5. The mounting flange 1 is mounted on the fixing flange 2, and the high-temperature gasket 3 is positioned between the mounting flange 1 and the fixing flange 2. Specifically, the mounting flange 1 is fixed to the fixing flange 2 by threading hexagonal screws 7 through the mounting through holes 5 and the non-through-hole threads. Of course, the number of hexagonal screws 7 can be increased as needed.

[0027] The mounting flange 1 is provided with a first mounting hole and a second mounting hole at intervals, with at least one second mounting hole. The first and second mounting holes are arranged in a straight line. The high-temperature resistant gasket 3 is provided with an interference through hole 15 that is aligned with the first and second mounting holes. The fixed flange 2 is provided with a large rectangular through hole or multiple matching through holes. The high-temperature resistant gasket 3 also serves as a seal. The anti-wear rod 8 is inserted into the coal mill outlet pipe 6 through the first mounting hole. The temperature measuring element 4 is inserted into the coal mill outlet pipe 6 through the second mounting hole. The anti-wear rod 8 is located directly below the temperature measuring element 4. The anti-wear rod 8 first contacts the pulverized coal flowing in the coal mill outlet pipe 6. The width of the anti-wear rod 8 is greater than or equal to the width of the temperature measuring element 4 to ensure that the flowing pulverized coal does not directly impact the temperature measuring element 4.

[0028] In actual operation, the pulverized coal flowing in the outlet pipe 6 of the coal mill is first diverted by the anti-wear rod 8 to prevent it from directly impacting the temperature sensing element 4, thus providing good protection for the element and extending its service life. Figure 1As shown, only one temperature sensing element 4 is installed on the mounting flange 1, while the other two temperature sensing elements 4 are directly fixed to the coal mill outlet pipe 6 in the existing way. Of course, the other two temperature sensing elements 4 can also be installed on the mounting flange 1, only by changing the dimensions of the mounting flange 1, fixing flange 2 and other structures. Alternatively, one anti-wear rod 8 and one temperature sensing element 4 can be used as a group, and three groups can be set at intervals on the coal mill outlet pipe 6.

[0029] Preferably, to ensure the wear resistance of the anti-wear rod 8, it is made of stainless steel. The cross-section of the anti-wear rod 8 can be square, rectangular, or L-shaped, as long as its projected width is greater than the width of the temperature sensing element 4. Of course, the extension length of the anti-wear rod 8 is greater than the extension length of the temperature sensing element 4. Preferably, the anti-wear rod 8 is a cubical strip, with its sides angled at 45° to the horizontal plane. This arrangement aims to divert the flowing pulverized coal impacting the two sides of the anti-wear rod 8, effectively reducing the frontal impact of the pulverized coal on the temperature sensing element 4.

[0030] Preferably, to facilitate the replacement of the anti-wear rod 8 and the temperature measuring element 4, a first sleeve 10 and a second sleeve 11 are welded to the outside of the mounting flange 1, respectively. The shape of the through hole in the first sleeve 10 is adapted to the first mounting hole and the anti-wear rod 8, and the shape of the through hole in the second sleeve 11 is adapted to the second mounting hole and the temperature measuring element 4. The first sleeve 10 and the second sleeve 11 are respectively provided with threaded through holes 13, and a locking screw 14 is threadedly connected to the threaded through holes 13. When the anti-wear rod 8 and the temperature measuring element 4 are installed in place, the installation can be ensured by tightening the locking screw 14. When disassembly is required, the locking screw 14 is loosened and the anti-wear rod 8 and the temperature measuring element 4 can be pulled out.

[0031] For ease of operation, the end of the anti-abrasion rod 8 is equipped with a handle 9, which is also made of stainless steel. A rubber sleeve can also be installed on the outside of the handle 9 to improve hand comfort.

[0032] In this embodiment, the high-temperature resistant gasket 3 is provided with interference through holes 15 that are interference fit with the anti-wear rod 8 and the temperature measuring element 4, the purpose of which is to ensure sealing and prevent pulverized coal from overflowing.

[0033] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A novel anti-wear temperature kit for coal mill outlet, installed on the coal mill outlet pipe (6), characterized in that, include: The assembly includes a mounting flange (1), a fixing flange (2), a high-temperature gasket (3), a temperature measuring element (4), and an anti-wear rod (8). The fixing flange (2) is fixed on the coal mill outlet pipe (6). The mounting flange (1) is installed on the fixing flange (2), and the high-temperature gasket (3) is placed between the mounting flange (1) and the fixing flange (2). The mounting flange (1) is provided with a first mounting hole and a second mounting hole at intervals. At least one second mounting hole is provided. The first mounting hole and the second mounting hole are arranged in a straight line. The anti-wear rod (8) is inserted into the coal mill outlet pipe (6) through the first mounting hole. The temperature measuring element (4) is inserted into the coal mill outlet pipe (6) through the second mounting hole. The coal powder in the coal mill outlet pipe (6) flows from bottom to top. The anti-wear rod (8) is located directly below the temperature measuring element (4). The width of the anti-wear rod (8) is greater than or equal to the width of the temperature measuring element (4).

2. The novel anti-wear temperature kit for coal mill outlet as described in claim 1, characterized in that: The wear-resistant rod (8) is made of stainless steel.

3. The novel anti-wear temperature kit for coal mill outlet as described in claim 2, characterized in that: The cross-section of the anti-wear rod (8) is square.

4. The novel anti-wear temperature kit for coal mill outlet as described in claim 3, characterized in that: The side of the anti-wear rod (8) is set at 45° to the horizontal plane.

5. The novel anti-wear temperature kit for coal mill outlet as described in claim 4, characterized in that: The outer side of the mounting flange (1) is welded with a first sleeve (10) and a second sleeve (11). The shape of the through hole in the first sleeve (10) is adapted to the anti-wear rod (8), and the shape of the through hole in the second sleeve (11) is adapted to the temperature measuring element (4). The first sleeve (10) and the second sleeve (11) are respectively provided with a locking screw (14).

6. The novel anti-wear temperature kit for coal mill outlet as described in claim 5, characterized in that: The anti-wear rod (8) has a handle (9) at its end.

7. The novel anti-wear temperature kit for coal mill outlet as described in claim 6, characterized in that: The high-temperature resistant gasket (3) is provided with interference through holes (15) that are interference fit with the anti-wear rod (8) and the temperature measuring element (4).

8. The novel anti-wear temperature kit for coal mill outlet as described in claim 7, characterized in that: The mounting flange (1) and the fixing flange (2) are fixed together by at least four hexagonal screws (7).

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