Automatic slagging structure of hot blast stove

Abstract

The utility model relates to a hot blast furnace automatic deslagging structure for installing on the deslagging pipeline of hot blast furnace, including support frame and the baffle piece of rotation installation support frame, the one end of baffle piece is provided with the baffle that adapts to the deslagging pipe, the other end of baffle piece is provided with counterweight, under the conventional state, the baffle blocks and collects the combustion residue produced by hot blast furnace, when the weight of residue is greater than the weight of counterweight, the baffle and deslagging pipe separate and form the deslagging pipe, the baffle passes through the balance effect of counterweight and blocks the in and out of deslagging pipe, ensures the efficient collection of combustion residue, when the weight of residue accumulates and exceeds the weight of counterweight, the baffle piece automatically overturns, makes the baffle separate with deslagging pipe and forms the deslagging pipe, waits for the residue to discharge, and the baffle can also automatically reset and block, this process completely does not need manual operation, not only saves the artificial cost of special person fixed time deslagging, but also avoids the scalding risk that operating personnel directly contacts high temperature deslagging pipe, significantly improves the operation safety.

Description

Technical Field

[0001] This utility model relates to the field of hot blast stoves, and more particularly to an automatic slag removal structure for hot blast stoves. Background Technology

[0002] In industrial production, hot blast stoves, as core equipment for providing high-temperature hot air, are widely used in metallurgy, chemical industry, building materials, grain drying, and many other industries. Their working principle is mainly based on the generation of high-temperature flue gas through fuel combustion, which then transfers its heat to the air, ultimately forming hot air to meet production needs. However, during fuel combustion, a large amount of combustion residue (commonly known as slag) is inevitably produced. To remove this residue in a timely manner, a collection box is designed inside the hot blast stove, allowing the residue to fall into the box. When the residue accumulates to a certain amount, workers periodically open the collection box. Because the temperature near the slag discharge pipe of the hot blast stove is high, manual operation requires workers to be in close contact with the high-temperature area, posing a safety hazard such as burns. Furthermore, during the manual opening of the slag discharge door, a large amount of high-temperature gas inside the hot blast stove leaks out, causing heat loss, further reducing the thermal efficiency of the hot blast stove, and also adversely affecting the temperature of the surrounding working environment. Utility Model Content

[0003] The purpose of this invention is to provide an automatic slag discharge structure for a hot blast stove, in order to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: an automatic ash removal structure for a hot blast stove, which is installed on the ash removal pipe of the hot blast stove. A ash-blocking component is rotatably installed on the outer surface of the ash removal pipe. One end of the ash-blocking component is provided with a baffle adapted to the ash removal pipe, and the other end of the ash-blocking component is provided with a counterweight. Under normal conditions, the baffle blocks the ash removal pipe and collects the combustion residue generated by the hot blast stove. When the weight of the residue is greater than the weight of the counterweight, the baffle and the ash removal pipe separate to form an ash removal port.

[0005] Compared with existing technologies, the beneficial effects of this solution are as follows: 1) Under normal conditions, the baffle is tightly attached to the slag discharge pipe through the balancing effect of the counterweight to collect combustion residues; when the weight of the residues exceeds the weight of the counterweight, the baffle automatically flips, causing the baffle to separate from the slag discharge pipe to form a slag discharge port. After the residues are discharged, the baffle can automatically reset and seal. This process does not require manual supervision or operation, which not only saves the labor cost of regular slag cleaning by dedicated personnel, but also avoids the risk of burns from direct contact with the high-temperature slag discharge pipe by operators, significantly improving operational safety. 2) Conventional manual ash removal structures require frequent opening of the ash removal door, which can easily lead to leakage of high-temperature gas inside the hot blast stove, resulting in a large waste of heat energy. In contrast, this automatic ash removal structure, when not in the ash removal state, uses the constant weight of the counterweight to seal the ash removal pipe, effectively preventing the leakage of high-temperature gas flow from inside the hot blast stove. Even during ash removal, the baffle only opens briefly under the gravity of the residue and quickly resets after ash removal, reducing heat energy loss. Long-term operation can reduce fuel consumption of the hot blast stove and improve thermal efficiency.

[0006] In a preferred embodiment of this application, a hinge seat is fixedly installed on the support frame, and two connecting plates are fixedly connected to the support frame. The slag-blocking component is rotatably connected to the connecting plates, and a limit rod is installed between the two connecting plates.

[0007] The beneficial effects of this solution are as follows: By adding a limiting rod between the two connecting plates, the maximum flipping angle of the slag-blocking component can be precisely limited. When the weight of the residue exceeds the weight of the counterweight, the slag-blocking component rotates and flips around the connecting plate until it contacts the limiting rod and stops, thus avoiding the situation where the slag-blocking component cannot be reset due to excessive flipping. At the same time, the limiting rod can ensure that the slag-blocking component flips to a sufficient angle, so that the slag discharge pipe maintains a reasonable opening and ensures that the residue is discharged smoothly.

[0008] In a preferred embodiment of this application, the baffle is provided with a stacking platform adapted to the slag discharge channel inside the slag discharge pipe.

[0009] The beneficial effects of this solution are as follows: This solution sets up a stacking platform on the baffle that is compatible with the slag discharge channel inside the slag discharge pipe. The stacking platform can be embedded in the slag discharge channel to form a dual structure of receiving inside the channel and sealing the edge: preventing air from entering the hot blast stove from the gap between the baffle and the slag discharge pipe.

[0010] In a preferred embodiment of this application, the counterweight has a receiving chamber, a fixing rod is fixedly installed in the receiving chamber, a counterweight block is sleeved on the fixing rod, and a locking member is threadedly connected to the fixing rod to fix the counterweight block in the receiving chamber.

[0011] The beneficial effects of this solution are as follows: By setting up a fixed rod and locking components, the number of counterweights fitted on the fixed rod can be increased or decreased, or counterweights of different weights and specifications can be replaced, according to actual working conditions. After adjustment, the counterweights are fixed in the receiving chamber by the locking components, ensuring that the counterweight weight accurately matches the triggering requirements of the current residue. Compared with the fixed counterweight in the existing technology, this solution can dynamically adjust the counterweight according to the hot blast stove operating conditions, greatly improving the adaptability of the slag discharge system and avoiding slag discharge failures caused by improper counterweights.

[0012] In a preferred embodiment of this application, a rotating column is provided between the baffle and the counterweight, and a rotating hole adapted to the rotating column is provided on the connecting plate.

[0013] The beneficial effects of this solution are: the cooperation between the rotating column and the rotating hole prevents the lever arm from shifting during the rotation of the slag-blocking component.

[0014] In a preferred embodiment of this application, a sealing plate is rotatably installed inside the slag discharge pipe, and a linkage is connected between the sealing plate and the stacking platform. When the baffle and the slag discharge pipe abut, the sealing plate is in a nearly vertical or vertical state inside the slag discharge pipe. When the baffle and the slag discharge pipe are open, the sealing plate is in a nearly horizontal or horizontal state inside the slag discharge pipe.

[0015] The beneficial effects of this solution are as follows: When the baffle is opened to discharge slag, there is a pressure difference between the inside and outside of the slag discharge pipe. External cold air or airflow from the downstream pipe is prone to backflow into the hot blast stove, which not only affects the temperature stability inside the furnace, but may also cause incompletely discharged residue to be carried back to the slag discharge pipe by the airflow, causing secondary accumulation and blockage. This solution solves this problem by the linkage and flipping of the sealing plate: When the baffle and the slag discharge pipe are opened, the sealing plate is horizontally set inside the slag discharge pipe under the action of the linkage, forming a horizontal barrier that can prevent external airflow from backflowing into the hot blast stove and maintain the stability of the pressure and temperature inside the furnace. On the other hand, it can receive the residue falling from the upstream of the slag discharge pipe and guide it to be discharged smoothly downwards, avoiding the backflow of residue caused by airflow backflow.

[0016] In a preferred embodiment of this application, a connecting seat is installed on both the sealing plate and the stacking platform, and a linkage rod is connected between the two connecting seats. The two ends of the linkage rod are rotatably connected to the two connecting seats respectively.

[0017] The beneficial effects of this solution are: when the baffle drives the stacking platform to flip, the linkage rod can adaptively adjust its angle through the rotation of both ends, always maintaining a stable connection with the two connecting seats, ensuring that the sealing plate can accurately follow the movement rhythm of the baffle to flip.

[0018] In addition to the technical problems solved by the present invention, the technical features constituting the technical solutions, and the advantages brought about by the technical features of these technical solutions as described above, other technical problems that the present invention can solve, other technical features contained in the technical solutions, and the advantages brought about by these technical features will be further described in detail with reference to the accompanying drawings. Attached Figure Description

[0019] Figure 1 This is a three-dimensional view of the automatic slag discharge structure of the hot blast stove in the conventional state of this application.

[0020] Figure 2 This is a three-dimensional view of the automatic slag discharge structure of the hot blast stove in this application during slag discharge.

[0021] Figure 3 This is a cross-sectional view of the automatic slag discharge structure of the hot blast stove in the conventional state of this application.

[0022] Figure 4This is a cross-sectional view of the automatic slag discharge structure of the hot blast stove in this application during slag discharge.

[0023] Explanation of reference numerals: 01. Slag discharge pipe, 02. Hinge seat, 03. Slag retaining component, 04. Baffle, 05. Counterweight, 06. Support frame, 07. Stacking platform, 08. Connecting plate, 09. Rotating column, 10. Limiting rod, 11. Reception chamber, 12. Fixing rod, 13. Locking nut, 14. Counterweight block, 15. Sealing plate, 16. Connecting seat, 17. Linkage rod. Detailed Implementation

[0024] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings.

[0025] Please see Figure 1-2 As shown, the automatic ash removal structure of the hot blast stove in this embodiment is installed below the ash removal pipe 01 of the hot blast stove. It includes a support frame 06 and a ash-blocking component rotatably mounted on the support frame 06. A hinge seat 02 is fixedly installed on the support frame 06, and a ash-blocking component 03 is rotatably mounted on the hinge seat 02. The middle part of the ash-blocking component 03 is rotatably connected to the hinge seat 02. One end of the ash-blocking component 03 is provided with a baffle 04 adapted to the ash removal pipe 01, located at the outlet of the ash removal pipe 01. The other end of the ash-blocking component 03 is provided with a counterweight 05, located outside the ash removal pipe 01. Under normal conditions, the baffle 04, under the action of the counterweight 05, abuts against the ash removal pipe 01, sealing the outlet of the ash removal pipe 01, preventing air from outside the ash removal pipe 01 from entering the hot blast stove, and reducing heat loss from the hot blast stove. As the hot blast stove continues to operate, the residue (slag) generated during the operation falls from the slag discharge pipe 01 onto the baffle 04 and accumulates there. When the weight of the residue accumulated on the baffle 04 exceeds the weight of the counterweight 05, the slag-blocking component 03 rotates around the hinge seat 02, and the entire slag-blocking component 03 tilts. At this time, the baffle 04 and the slag discharge pipe 01 separate to form a slag discharge port. The residue accumulated on the baffle 04 falls from the slag discharge port under the action of gravity, achieving the effect of automatic slag discharge. After the residue on the baffle 04 falls off, the slag-blocking component 03 rotates in the opposite direction under the action of the counterweight 05, causing the baffle 04 to abut against the slag discharge pipe 01 again and sealing the discharge port on the slag discharge pipe 01.

[0026] To ensure that when the baffle 04 seals the slag discharge pipe 01, it reduces the amount of air entering the slag discharge pipe 01 through the gap between the baffle 04 and the slag discharge pipe 01, the baffle 04 is equipped with a stacking platform 07 that is compatible with the slag discharge channel inside the slag discharge pipe 01. The stacking platform 07 further reduces the amount of air entering the slag discharge pipe 01 when the baffle 04 seals it, thereby further reducing heat loss from the hot blast stove.

[0027] Two connecting plates 08 are welded to the hinge seat 02. The two connecting plates 08 are parallel to each other and have mounting grooves for the slag-blocking component 03. Each connecting plate 08 has a rotating hole. The slag-blocking component 03 has a rotating column 09 connected to the rotating hole, located between the baffle 04 and the counterweight 5. The rotating column 09 and the rotating hole work together to rotatably connect the slag-blocking component 03 and the connecting plates 08. A limit rod 10 is installed between the two connecting plates 08 to limit the rotation angle of the slag-blocking component 03 during rotation, thus achieving the opening angle of the baffle 04 and the slag discharge pipe 01. This prevents the counterweight 05 from being directly above the rotating column 09, which could cause the slag-blocking component 03 to fail to return to its original position, ensuring that the slag-blocking component 03 remains in an inclined state during slag discharge.

[0028] The counterweight 05 has a receiving chamber 11. A fixing rod 12 is fixedly installed in the receiving chamber 11 by welding. The fixing rod 12 has external threads on its outer surface and a locking device is threaded onto the fixing rod 12. The locking device is preferably a nut 13. A counterweight block 14 that matches the receiving chamber 11 is fitted onto the fixing rod 12. After the counterweight block 14 is fitted onto the fixing rod 12, it is fixed by the nut 13 to prevent the counterweight block 14 from shaking in the receiving chamber 11 during the rotation of the slag-blocking rod. At the same time, different numbers of counterweight blocks 14 can be placed in the receiving chamber 11 according to the actual situation to adjust the overall weight of the counterweight.

[0029] Please see Figure 3-4 As shown, to prevent air from entering the blast furnace through the slag discharge pipe 01 during the slag discharge process, a sealing plate 15 is rotatably installed inside the slag discharge pipe 01. The sealing plate 15 is adapted to the slag discharge channel inside the slag discharge pipe 01, ensuring that the sealing plate 15 will not interfere with the slag discharge channel when rotating inside the slag discharge channel. Two connecting shafts are integrally formed on the sealing plate 15, and the two connecting shafts are arranged opposite to each other on the sealing plate 15. The slag discharge pipe 01 is provided with connecting holes adapted to the connecting shafts. The sealing plate 15 rotates inside the slag discharge pipe 01 through the cooperation of the connecting holes and connecting shafts. At the same time, the distance from the connecting hole to the bottom of the slag discharge pipe 01 is greater than the diameter of the slag discharge channel. In this example, the distance from the connecting hole to the bottom of the slag discharge pipe 01 is 1.5 times the diameter of the slag discharge channel. When the sealing plate 15 rotates inside the slag discharge pipe 01, during the process of the sealing plate 15 changing from a vertical state to a horizontal state, the sealing plate 15 will not interfere with the residue (coal slag) accumulated on the baffle 04.

[0030] Both the sealing plate 15 and the stacking platform 07 are equipped with connecting seats 16, which are located on the same side. A linkage rod 17 connects the two connecting seats 16, with both ends of the linkage rod 17 rotatably connected to the two connecting seats 16 respectively. When the baffle 04 and the slag discharge pipe 01 abut, the sealing plate 15 is in a nearly vertical or vertical state inside the slag discharge pipe 01, forming connecting channels on both sides of the sealing plate 15 for the residue to pass through. When the baffle 04 rotates to discharge the residue from the slag discharge pipe 01, the linkage rod 17 drives the sealing plate 15 to rotate inside the slag discharge pipe 01. When the baffle 04 and the slag discharge pipe 01 are opened to their maximum extent, the sealing plate 15 is in a nearly horizontal or horizontal state, preventing air from entering the hot blast stove from the slag discharge pipe 01. After the residue accumulated on the baffle 04 is discharged from the slag discharge pipe 01, the baffle 04 rotates in the opposite direction. At this time, the sealing plate 15 is pushed to rotate in the opposite direction through the linkage rod 17, so that the sealing plate 15 returns to the vertical state, and the baffle 04 comes into contact with the slag discharge pipe 01 again.

[0031] If the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0032] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Any modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. An automatic ash removal structure for a hot blast stove, installed below the ash removal pipe of the hot blast stove, characterized in that, It includes a support frame and a slag-blocking component on the rotating support frame. One end of the slag-blocking component is equipped with a baffle that is compatible with the slag discharge pipe, and the other end of the slag-blocking component is equipped with a counterweight. Under normal conditions, the baffle blocks the slag discharge pipe and collects the combustion residue generated by the hot blast stove. When the weight of the residue is greater than the weight of the counterweight, the baffle and the slag discharge pipe separate to form a slag discharge port.

2. The automatic ash removal structure for a hot blast stove according to claim 1, characterized in that: A hinge seat is fixedly installed on the support frame, and two connecting plates are fixedly connected to the hinge seat. The slag-blocking component and the connecting plates are rotatably connected, and a limit rod is installed between the two connecting plates.

3. The automatic ash removal structure for a hot blast stove according to claim 2, characterized in that: The baffle is equipped with a stacking platform that is compatible with the slag discharge channel inside the slag discharge pipe.

4. The automatic ash removal structure for a hot blast stove according to claim 1, characterized in that: The counterweight has a receiving chamber, a fixing rod is fixedly installed in the receiving chamber, a counterweight is sleeved on the fixing rod, and a locking device is threaded on the fixing rod to fix the counterweight in the receiving chamber.

5. The automatic ash removal structure for a hot blast stove according to claim 2, characterized in that: A rotating column is provided between the baffle and the counterweight, and a rotating hole adapted to the rotating column is provided on the connecting plate.

6. The automatic ash removal structure for a hot blast stove according to claim 3, characterized in that: A sealing plate is rotatably installed inside the slag discharge pipe. A linkage is connected between the sealing plate and the stacking platform. The sealing plate is in a nearly vertical or vertical state inside the slag discharge pipe. When the baffle and the slag discharge pipe are opened, the sealing plate is in a nearly horizontal or horizontal state inside the slag discharge pipe.

7. The automatic ash removal structure for a hot blast stove according to claim 6, characterized in that: Both the sealing plate and the stacking platform are equipped with connecting seats, and a linkage rod is connected between the two connecting seats. The two ends of the linkage rod are rotatably connected to the two connecting seats respectively.

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