Ignition device of pulverized coal calcining furnace

Abstract

The utility model provides an ignition device for a pulverized coal calcining furnace, which is convenient for ignition of an ignition handle and capable of increasing the safety of manual ignition, and relates to the technical field of calcining furnaces. According to the technical scheme, the ignition device of the pulverized coal calcinator comprises a torch support and a torch for calcinator ignition, the torch support is installed on the outer side of an ignition hole of the calcinator, and the torch comprises a torch rod and a combustible torch head arranged at one end of the torch rod. The torch support is provided with a positioning groove which extends along the axis of the ignition hole and is matched with the outer diameter of the torch rod, and the torch support is further provided with a fastener which can be buckled on the positioning groove so as to press and fix the torch rod in the positioning groove. The torch rod is provided with a limiting boss which is matched with the outer end face of the ignition hole and used for positioning the depth of the torch rod inserted into the ignition hole. According to the utility model, the possibility of detonation in the furnace and personnel scalding during ignition can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of calcining furnace technology, specifically an ignition device for a pulverized coal calcining furnace. Background Technology

[0002] A pulverized coal calciner is a type of calciner that uses pulverized coal as a heat source. Because pulverized coal has a high ignition point, it requires diesel fuel for ignition. Currently, there are two ignition methods used in the pulverized coal calciner industry: electronic automatic ignition and manual ignition.

[0003] Because electronic automatic ignition produces a very small flame, the furnace requires a very low negative pressure, typically between -30 and -80 Pa, to prevent the flowing air inside the furnace from extinguishing it. This low negative pressure environment necessitates a very low induced draft fan opening. Once the sprayed diesel fuel is ignited, the rapid combustion causes a sudden increase in positive pressure within the furnace. If the diesel fuel flow rate for ignition is not precisely controlled, excessive flow can lead to furnace deflagration, with flames shooting out through inspection holes, observation holes, and ash holes, posing a significant risk of fire or burns. If the furnace unexpectedly goes out during normal production and needs to be re-ignited, the negative pressure must be lowered significantly again, taking a considerable amount of time, typically exceeding 10 minutes, severely impacting production efficiency.

[0004] Manual ignition typically involves lighting a torch soaked in diesel fuel, placing it near the fuel spray nozzle through the ignition port, and then slowly opening the diesel fuel injection device. The diesel fuel ignites upon contact with the flame. Because the torch flame is relatively large, a high negative pressure can be maintained inside the furnace; it only needs to be below -500 Pa. The torch flame is not easily extinguished, and the system typically lowers to -500 Pa within 2-3 minutes. However, manual ignition requires a person to hold the torch by the end of the torch handle and guide the burning torch near the diesel fuel injection device. The ignition port is usually small, making it difficult to observe the torch's position. Furthermore, the person holding the torch is not always consistent, which can cause the torch to deviate from the diesel fuel injection device, resulting in the injected diesel fuel not igniting. When the torch is shaken to ignite the diesel fuel, the atomized diesel fuel accumulates inside the furnace, causing a deflagration. The resulting positive pressure causes the flame to erupt from the ignition port, potentially causing burns. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide an ignition device for pulverized coal calcining furnace that facilitates ignition by torch and increases the safety of manual ignition.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a coal pulverized calciner ignition device, including a torch support and a torch for igniting the calciner. The torch support is installed on the outside of the ignition hole of the calciner, and the torch includes a torch rod and a combustible torch head set at one end of the torch rod.

[0007] The torch bracket is provided with a positioning groove that extends along the axis of the ignition hole and is adapted to the outer diameter of the torch rod so that the torch rod is coaxially inserted into the ignition hole. The torch bracket is also provided with a fastener that can be fastened to the positioning groove to press and fix the torch rod in the positioning groove.

[0008] The torch rod is provided with a limiting boss that mates with the outer end face of the ignition hole to position the depth to which the torch rod is inserted into the ignition hole.

[0009] Furthermore, one end of the fastener is hinged to the torch bracket via a hinge pin located on one side of the positioning groove and extending along the positioning groove, and the other side of the positioning groove is provided with a bolt connected to the other end of the fastener.

[0010] Furthermore, the positioning groove is opened facing upwards.

[0011] Furthermore, the fastener includes a fastener body and a pressure plate for contacting the torch rod to press and fix the torch rod in the positioning groove. The pressure plate is slidably connected to the fastener body in the direction of pressing the torch rod, so that it can slide away from the torch rod relative to the fastener body when pressing the torch rod. The fastener body is provided with a spring to prevent the pressure plate from sliding away from the torch rod.

[0012] Furthermore, the spring is a compressible compression spring disposed between the fastener body and the pressure plate.

[0013] The beneficial effects of this utility model are as follows: The ignition device for the pulverized coal calciner of this utility model has a positioning groove 21 and a fastener 4 on the torch support 2, and a limiting boss 13 on the torch rod 11. Through the function of the limiting boss 13, the positioning groove 21 and the fastener 4, the torch head 12 can be ensured to be in the optimal ignition position at the nozzle of the diesel injection device 7. At the same time, it is not necessary to hold the torch to ignite, which can better ensure torch ignition, reduce the possibility of furnace deflagration and personnel burns during ignition, and increase the safety of manual ignition. Attached Figure Description

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

[0015] Figure 2 This is a schematic diagram showing the torch rod being pressed and fixed in the positioning groove by fasteners;

[0016] Figure 3 This is a structural diagram of the fastener;

[0017] The following components are shown in the figure: torch support 2, calcining furnace 3, fastener 4, hinge shaft 5, bolt 6, diesel fuel injection device 7, torch rod 11, torch head 12, limiting boss 13, positioning groove 21, ignition hole 31, fastener body 41, pressure plate 42, and spring 43. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] like Figures 1 to 2 As shown, this utility model discloses a coal pulverized calciner ignition device, including a torch support 2 and a torch for igniting the calciner. The torch support 2 is installed outside the ignition hole 31 of the calciner 3. The torch includes a torch rod 11 and a combustible torch head 12 disposed at one end of the torch rod 11. The torch support 2 is provided with a positioning groove 21 extending along the axis of the ignition hole 31 and adapted to the outer diameter of the torch rod 11 so that the torch rod 11 is coaxially inserted into the ignition hole 31. The torch support 2 is also provided with a fastener 4 that can be fastened to the positioning groove 21 to press and fix the torch rod 11 in the positioning groove 21. The torch rod 11 is provided with a limiting boss 13 that cooperates with the outer end face of the ignition hole 31 to position the depth of the torch rod 11 inserted into the ignition hole 31.

[0020] The exact depth to which the torch rod 11 is inserted into the ignition hole 31 can be determined through experimentation.

[0021] When using the ignition device for a pulverized coal calciner of this utility model, first adjust the negative pressure inside the furnace to below -500Pa. Then, ignite the torch head 12. Next, place the torch rod 11 in the positioning groove 21 and gradually push the torch rod 11 deeper into the calciner along the direction of the positioning groove 21 until the limiting boss 13 moves to the ignition hole 31 and abuts against the outer end face of the ignition hole 31, at which point the torch rod 11 can no longer be inserted into the ignition hole 31. At this time, the torch, through the limiting boss 13 and the positioning groove 21, ensures that the torch head 12 is in the optimal ignition position at the nozzle of the diesel injection device 7. Finally, use the fastener 4 to press and fix the torch rod 11 in the positioning groove 21 to ensure that the torch will not move. At this time, the ignition personnel evacuate to the safe area of ​​the ignition control panel, turn on the diesel injection device, and ignition can be performed.

[0022] The ignition device for a pulverized coal calciner of this utility model has a positioning groove 21 and a fastener 4 on the torch support 2, and a limiting boss 13 on the torch rod 11. Through the function of the limiting boss 13, the positioning groove 21 and the fastener 4, the torch head 12 can be placed at the optimal ignition position at the nozzle of the diesel injection device 7. At the same time, it is not necessary to hold the torch to ignite, which can better ensure torch ignition, reduce the possibility of furnace deflagration and personnel burns during ignition, and increase the safety of manual ignition.

[0023] like Figure 2 As shown, one end of the fastener 4 is hinged to the torch holder 2 via a hinge pin 5 located on one side of the positioning groove 21 and extending along the direction of the positioning groove 21. The other side of the positioning groove 21 is provided with a bolt 6 connected to the other end of the fastener 4. The fastener is secured to the positioning groove 21 by the bolt 6. In some embodiments, the fastener is also installed on the torch holder 2 by bolting both ends to it, but this makes the installation and removal of the fastener 4 relatively more complicated.

[0024] The positioning groove 21 can be oriented towards, downwards, left, or right, etc. In this utility model, for example... Figure 2 As shown, the positioning groove 21 is ideally oriented upwards. This upward orientation of the positioning groove 21 facilitates the installation of the torch.

[0025] like Figure 3 As shown, in this utility model, the fastener 4 includes a fastener body 41 and a pressure plate 42 for contacting the torch rod 11 to press and fix the torch rod 11 in the positioning groove 21. The pressure plate 42 is slidably connected to the fastener body 41 in the direction of pressing the torch rod 11, so that it can slide relative to the fastener body 41 away from the torch rod 11 when pressing the torch rod 11. The fastener body 41 is provided with a spring 43 to prevent the pressure plate 42 from sliding away from the torch rod 11. The spring 43 can be a tension spring or a compression spring. Figure 3 In this context, spring 43 is a compressible compression spring disposed between the fastener body 41 and the pressure plate 42.

[0026] In some embodiments, fastener 4 consists only of the fastener body.

[0027] In practice, for ease of ignition, the ignition hole 31 is generally located below the diesel injection device 7 and tilted upwards. This makes it easy for the torch to slide down under gravity during installation, causing positional changes. If the fastener 4 consists only of the fastener body, it is difficult to control the pressure between the fastener and the torch rod 11 initially. If the bolt 6 is tightened too much, the torch rod 11 will be completely compressed, making it difficult to move; if the bolt 6 is tightened too little, although it facilitates the movement of the torch rod 11 into the calcining furnace, it is necessary to ensure that the torch rod 11 does not slide downwards when tightening the bolt 6 later. Tightening the bolt 6 requires both tightening the fastener 4 bolt and controlling the torch rod 11, making the operation inconvenient. The following explanation uses a compressible spring 43 located between the fastener body 41 and the pressure plate 42 as an example. After configuring the fastener 4 as described above, including the fastener body 41 and the pressure plate 42 for contacting the torch rod 11 to press and fix the torch rod 11 in the positioning groove 21, the spring 43 can be compressed by turning the bolt 6 during torch installation. The pressure between the pressure plate 42 and the torch rod 11 can be controlled by controlling the compression of the spring 43, making pressure control more convenient. During torch installation, turning the bolt 6 to compress the spring 43 to a certain extent allows the friction generated by the pressure between the pressure plate 42 and the torch rod 11 to overcome the sliding force while avoiding excessive friction that would affect the movement of the torch rod 11 along the positioning groove 21. Thus, during torch installation, the torch rod can be moderately locked by the fastener to prevent it from sliding down. Then, the torch rod can be pushed along the positioning groove 21 until the limiting boss 13 moves to the ignition hole 31 and abuts against the outer end face of the ignition hole 31. Finally, the bolt 6 can be tightened directly without further control of the torch rod 11, making operation more convenient.

[0028] In this new embodiment, the torch rod is a circular steel pipe; in some embodiments, the torch rod is also made of a rectangular steel pipe.

Claims

1. An ignition device for a pulverized coal calciner, characterized in that: It includes a torch support (2) and a torch for igniting a calcining furnace. The torch support (2) is installed outside the ignition hole (31) of the calcining furnace. The torch includes a torch rod (11) and a combustible torch head (12) set at one end of the torch rod (11). The torch bracket (2) is provided with a positioning groove (21) extending along the axis of the ignition hole (31) and adapted to the outer diameter of the torch rod (11) so that the torch rod (11) is coaxially inserted into the ignition hole (31). The torch bracket (2) is also provided with a fastener (4) that can be fastened to the positioning groove (21) to press and fix the torch rod (11) in the positioning groove (21). The torch rod (11) is provided with a limiting boss (13) that cooperates with the outer end face of the ignition hole (31) to position the depth of the torch rod (11) inserted into the ignition hole (31).

2. The ignition device for a pulverized coal calciner as described in claim 1, characterized in that: One end of the fastener (4) is hinged to the torch bracket (2) via a hinge pin (5) provided on one side of the positioning groove (21) and along the extension direction of the positioning groove (21). The other side of the positioning groove (21) is provided with a bolt (6) connected to the other end of the fastener (4).

3. The ignition device for a pulverized coal calciner as described in claim 1 or 2, characterized in that: The positioning groove (21) is opened facing upwards.

4. The ignition device for a pulverized coal calciner as described in claim 2, characterized in that: The fastener (4) includes a fastener body (41) and a pressure plate (42) for contacting the torch rod (11) to press and fix the torch rod (11) in the positioning groove (21). The pressure plate (42) is slidably connected to the fastener body (41) in the direction of pressing the torch rod (11) so that it can slide away from the torch rod (11) relative to the fastener body (41) when pressing the torch rod (11). The fastener body (41) is provided with a spring (43) to prevent the pressure plate (42) from sliding away from the torch rod (11).

5. The ignition device for a pulverized coal calciner as described in claim 4, characterized in that: The spring (43) is a compressible compression spring disposed between the fastener body (41) and the pressure plate (42).

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