Catenary staggered top-spraying and top-outlet top combustion hot blast stove

Abstract

The utility model provides a catenary staggered top-spraying upper-outlet top combustion hot blast stove which comprises a stove body. The premixing box is slidably mounted at the top of the outer surface of the furnace body, a threaded block is fixedly mounted on one side of the outer surface of the premixing box, and a vault is fixedly mounted at the top of the premixing box. According to the catenary staggered top-spraying and top-outlet top combustion hot blast stove, a thread is rotated through a threaded rod to be meshed with a threaded block, the threaded block drives a premixing box and a vault to slide on the surface of a stove body, and the vault moves upwards and drives a collecting device to be attached to the inner cavity wall of a heat storage chamber to move upwards at the same time; the collecting box scrapes and shovels combustion particles remaining on the surface of the inner cavity wall of the heat storage chamber, the scraped combustion particles are collected in the collecting groove along with upward movement of the collecting device, maintenance personnel can conveniently collect and clean the combustion particles collected by the collecting groove along with separation of the vault and the furnace body, the labor intensity of operators is relieved, and the working efficiency is improved. And the maintenance convenience of the hot-blast stove is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of top-fired hot blast stoves, and in particular to a top-fired hot blast stove with a catenary-shaped overhead spray and outlet. Background Technology

[0002] The hot air outlet of the top-fired hot blast stove of a blast furnace has always been located at the straight section outlet of the hot blast stove, both in ancient and modern times, and in China and abroad. Due to the effects of pressure (during the combustion period), tension (during the air supply period), and thermal expansion force, the hot air outlet is prone to damage. Moreover, the amount of bricks used at the straight section outlet of the hot blast stove is relatively large, which increases the investment in infrastructure.

[0003] Among internal combustion, external combustion, and top-fired hot blast stoves, the top-fired type is currently recognized as having the lowest investment, the most uniform heating, and the most stable structure. There are two main types of top-fired hot blast stoves: one is the Karugin hot blast stove, represented by the Karugin small hat, and the other is the Yuxing hot blast stove, represented by the Yuxing catenary arch. In the Karugin hot blast stove, the burner is located on the furnace wall of the small hat. Due to the small diameter limitation, the nozzles are divided into two, three, or four layers, with gas and air being sprayed out in swirling streams. In the Yuxing hot blast stove, the burner is located at the lower part of the catenary arch. Due to the large diameter, the arrangement of the nozzles is unrestricted. Gas and air are arranged alternately along the outer circumference of the inner wall, spraying upwards and ascending along the catenary to the upper part of the arch. The top of the catenary curve turns downwards, forming a vortex. In the Karl Cascade hot blast stove, the gas and air are injected in layers, resulting in poor mixing and a large combustion port, leading to long-flame combustion. The arrangement of the nozzles in the Karl Cascade hot blast stove limits the burner's power. Because the Karl Cascade hot blast stove uses a swirling injection, centrifugal force causes uneven airflow at the edges with high velocity and low velocity. In the Yuxing hot blast stove, the gas and air are injected upwards alternately, but without a premixing chamber, they are mixed after injection, still not constituting short-flame combustion. Because the burner in the Yuxing hot blast stove is located below the large catenary arch, with the gas and air arranged along the outer circumference of the inner wall, the burner has high power; however, it requires a large amount of bricks.

[0004] The hot air outlet of the top-fired hot blast stove is on the same central axis as the regenerator, catenary arch, and burner, resulting in a more uniform airflow distribution. This is beneficial for improving the utilization rate of the checker bricks and increasing the air temperature. However, after multiple combustions, combustion particles remain on the inner wall of the existing top-fired hot blast stove. These particles adhere to the inner wall of the stove and form an insulation layer, reducing the heat conduction efficiency of the stove wall. During subsequent combustion, heat cannot be quickly and effectively transferred to the regenerator and other parts, leading to a decrease in heat storage efficiency and ultimately affecting the air supply temperature and combustion efficiency. In the existing technology, cleaning the inside of the hot blast stove requires maintenance personnel to climb and dismantle the arch to clean the internal surface due to the height of the stove. This cleaning method is cumbersome and complex, increasing the labor intensity of maintenance personnel.

[0005] Therefore, it is necessary to provide a top-fired hot blast stove with a catenary-shaped inverted jet and outlet to solve the above-mentioned technical problems. Utility Model Content

[0006] This utility model provides a top-fired hot air furnace with a catenary-shaped inverted spray nozzle and outlet, which solves the problem that when cleaning the inside of the hot air furnace, maintenance personnel need to climb and dismantle the arched roof to clean the internal surface because the furnace body is high. This cleaning method is cumbersome and complicated, increasing the labor intensity of maintenance personnel.

[0007] To solve the above-mentioned technical problems, this utility model provides a top-fired hot blast stove with a catenary-shaped cross-flow spray and top outlet, comprising: a stove body;

[0008] A premixing box is slidably installed on the top of the outer surface of the furnace body. A threaded block is fixedly installed on one side of the outer surface of the premixing box, and an arch is fixedly installed on the top of the premixing box. A heat storage chamber is opened in the middle of the top of the furnace body.

[0009] A lifting component is fixedly installed on one side of the outer surface of the furnace body, and the lifting component is used to adjust the height of the premixing box;

[0010] A collection device is fixedly installed at the bottom inside the premixing box. The collection device includes a connecting block, a collection box, and a collection trough. Two connecting blocks are fixedly installed on both sides inside the dome. The collection box is located at the bottom of the connecting block, and the collection trough is located in the middle of the top of the collection box.

[0011] Preferably, the lifting component includes a mounting block, a threaded rod, and a blocking block. The mounting block is fixedly installed on one side of the outer surface of the furnace body, the threaded rod is rotatably installed on the top of the mounting block, and the blocking block is fixedly installed on the top of the threaded rod.

[0012] Preferably, a hot air duct is fixedly installed on the top of the arch, and a first combustion valve and a second combustion valve are fixedly installed on the upper and lower sides of the outer surface of the arch, respectively.

[0013] Preferably, a flue valve and a cold air valve are respectively provided on both sides of the bottom of the outer surface of the furnace body.

[0014] Preferably, the threaded block is threadedly engaged with the outer surface of the threaded rod, and a servo motor is installed inside the mounting block. The output shaft end of the servo motor is fixedly connected to the bottom end of the threaded rod via a coupling.

[0015] Preferably, a fixing block is fixedly installed on both sides of the surface of the collection box, a connecting hole is opened in the middle of one side of the fixing block, and a second threaded hole is opened on both sides of the surface of the collection box, with a bolt engaged in the internal thread of the second threaded hole.

[0016] Preferably, a first threaded hole is provided on one side of the outer surface of the connecting block.

[0017] Compared with related technologies, the overhead catenary-type hot blast stove with interlaced top spray and top outlet provided by this utility model has the following beneficial effects:

[0018] This utility model provides a top-fired hot air furnace with a catenary-driven interlaced spray and outlet. A threaded rod rotates and engages a threaded block, which in turn causes the premixing tank and the dome to slide on the furnace surface. As the dome moves upward, it simultaneously moves a collection device to adhere to the inner wall of the regenerator chamber. The collection box scrapes away residual combustion particles from the inner wall of the regenerator chamber. As the collection device moves upward, the scraped combustion particles are collected inside the collection trough. With the separation of the dome and the furnace body, maintenance personnel can easily collect and clean the combustion particles in the collection trough, reducing the labor intensity of operators and improving the convenience of hot air furnace maintenance. Attached Figure Description

[0019] Figure 1 A schematic diagram of the structure of a first embodiment of a top-fired hot blast stove with interlaced catenary spray and top outlet provided by this utility model;

[0020] Figure 2 for Figure 1 The diagram shows the separation of the premixing tank and the furnace body;

[0021] Figure 3 for Figure 2 The enlarged schematic diagram at point A is shown below;

[0022] Figure 4 A schematic diagram of the structure of a second embodiment of a top-fired hot blast stove with interlaced catenary lines and top spray outlet provided by this utility model;

[0023] Figure 5 for Figure 4 The enlarged schematic diagram at point B is shown.

[0024] The following are the labels in the diagram: 1. Furnace body, 2. Premix box, 3. Dome, 4. Hot air duct, 5. Lifting component, 51. Mounting block, 52. Threaded rod, 53. Blocking block, 6. Threaded block, 7. Heat storage chamber, 8. Collection device, 81. Connecting block, 82. Collection box, 83. Collection trough, 9. First combustion valve, 10. Second combustion valve, 11. Flue valve, 12. Cold air valve, 13. First threaded hole, 14. Fixing block, 15. Connecting hole, 16. Second threaded hole, 17. Bolt. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] First Embodiment

[0027] Please refer to the following: Figure 1 , Figure 2 and Figure 3 ,in, Figure 1 A schematic diagram of the structure of a first embodiment of a top-fired hot blast stove with interlaced catenary spray and top outlet provided by this utility model; Figure 2 for Figure 1 The diagram shows the separation of the premixing tank and the furnace body; Figure 3 for Figure 2 The enlarged schematic diagram at point A is shown.

[0028] A top-fired hot blast stove with catenary inverted spray and top outlet, comprising: a stove body 1;

[0029] The premixing box 2 is slidably installed on the top of the outer surface of the furnace body 1. A threaded block 6 is fixedly installed on one side of the outer surface of the premixing box 2. An arch 3 is fixedly installed on the top of the premixing box 2. A heat storage chamber 7 is opened in the middle of the top of the furnace body 1.

[0030] Lifting component 5 is fixedly installed on one side of the outer surface of the furnace body 1, and is used to adjust the height of the premix box 2;

[0031] The collection device 8 is fixedly installed at the bottom inside the premix box 2. The collection device 8 includes a connecting block 81, a collection box 82, and a collection trough 83. The two connecting blocks 81 are fixedly installed on both sides inside the dome 3, the collection box 82 is located at the bottom of the connecting block 81, and the collection trough 83 is located in the middle of the top of the collection box 82.

[0032] The lifting component 5 includes a mounting block 51, a threaded rod 52, and a blocking block 53. The mounting block 51 is fixedly installed on one side of the outer surface of the furnace body 1, the threaded rod 52 is rotatably installed on the top of the mounting block 51, and the blocking block 53 is fixedly installed on the top of the threaded rod 52.

[0033] A hot air duct 4 is fixedly installed on the top of the arch 3, and a first combustion valve 9 and a second combustion valve 10 are fixedly installed on the upper and lower sides of the outer surface of the arch 3, respectively.

[0034] The bottom of the outer surface of the furnace body 1 is provided with a flue valve 11 and a cold air valve 12 on both sides respectively.

[0035] The threaded block 6 is threadedly engaged with the outer surface of the threaded rod 52. A servo motor is installed inside the mounting block 51, and the output shaft end of the servo motor is fixedly connected to the bottom end of the threaded rod 52 through a coupling.

[0036] The collection box 82 is in the shape of a ring block, and its diameter is matched with that of the heat storage chamber 7.

[0037] The output shaft of the servo motor controls the forward and reverse rotation of the threaded rod 52.

[0038] The collection device 8 is made of steel, which is heat-resistant, flame-retardant, and not easily deformed.

[0039] When the premix box 2 and the dome 3 are placed on top of the outer surface of the furnace body 1, the connection between the premix box 2 and the furnace body 1 is coated with SL8081 high-temperature resistant sealant. Since cleaning the combustion particles does not need to be done after every combustion, the premix box 2 is disassembled and the sealant is applied again when the internal combustion particles need to be cleaned after multiple uses.

[0040] The working principle of the top-fired hot blast stove with interlaced catenary spray and top outlet provided by this utility model is as follows:

[0041] During operation, the threaded rod 52 first rotates and engages the threaded block 6. The threaded block 6 drives the premix box 2 and the dome 3 to slide upward on the surface of the furnace body 1, which in turn drives the collection device 8 to move upward. The collection box 82 slides upward against the inner wall of the heat storage chamber 7. The collection box 82 scrapes the combustion particles off the surface of the inner wall of the heat storage chamber 7, and the scraped combustion particles are collected by the collection trough 83.

[0042] As the dome 3 continues to move upward, the collection box 82 detaches from the furnace body 1, and the operator can climb to a higher position via a climbing frame to recover and clean the combustion particles collected in the collection trough 83.

[0043] Then the threaded rod 52 rotates in the opposite direction and engages the threaded block 6 to move downward, so that the premix box 2 and the dome 3 are once again locked onto the top of the outer surface of the furnace body 1.

[0044] Compared with related technologies, the overhead catenary-type hot blast stove with interlaced top spray and top outlet provided by this utility model has the following beneficial effects:

[0045] This utility model provides a top-fired hot air furnace with a catenary-shaped inverted spray nozzle and outlet. A threaded rod 52 rotates and engages a threaded block 6. The threaded block 6 causes the premixing tank 2 and the dome 3 to slide on the surface of the furnace body 1. As the dome 3 moves upward, it simultaneously causes the collecting device 8 to move upward against the inner wall of the regenerator chamber 7. The collecting box 82 scrapes away residual combustion particles from the inner wall of the regenerator chamber 7. As the collecting device 8 moves upward, the scraped combustion particles are collected inside the collecting trough 83. With the separation of the dome 3 and the furnace body 1, maintenance personnel can easily collect and clean the combustion particles collected in the collecting trough 83, reducing the labor intensity of operators and improving the convenience of hot air furnace maintenance.

[0046] Second Embodiment

[0047] Please refer to the following: Figure 4 and Figure 5 Based on the first embodiment of this application which provides a top-fired hot blast stove with staggered catenary spraying and top outlet, the second embodiment of this application proposes another type of top-fired hot blast stove with staggered catenary spraying and top outlet. The second embodiment is merely a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the separate implementation of the first embodiment.

[0048] Specifically, the second embodiment of this application provides a top-fired hot air furnace with a catenary-shaped staggered spray outlet, which differs in that a fixing block 14 is fixedly installed on both sides of the surface of the collection box 82, a connecting hole 15 is opened in the middle of one side of the fixing block 14, and a second threaded hole 16 is opened on both sides of the surface of the collection box 82, and a bolt 17 is engaged in the internal thread of the second threaded hole 16.

[0049] A first threaded hole 13 is provided on one side of the outer surface of the connecting block 81.

[0050] The working principle of the top-fired hot blast stove with interlaced catenary spray and top outlet provided by this utility model is as follows:

[0051] During operation, the connecting block 81 is first inserted into the collection groove 83, and the bolt 17 is threaded through the connecting hole 15 and engaged into the interior of the second threaded hole 16 and the first threaded hole 13, so that the connecting block 81 and the collection box 82 are assembled together.

[0052] Compared with related technologies, the overhead catenary-type hot blast stove with interlaced top spray and top outlet provided by this utility model has the following beneficial effects:

[0053] This utility model provides a top-fired hot air furnace with a catenary-shaped inverted spray nozzle and outlet. A bolt 17 passes through a connecting hole 15 and engages with the second threaded hole 16 and the first threaded hole 13, thus binding the connecting block 81 and the collection box 82 together. This device has a simple structure, is highly practical, and facilitates the disassembly and assembly of the collection box 82 from the surface of the connecting block 81. This makes it convenient for maintenance personnel to disassemble the collection box 82 and clean the collected combustion particles inside, thus improving the practicality and convenience of the device.

[0054] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A top-fired hot blast stove with a catenary-shaped overhead spray nozzle and outlet, characterized in that, include: Furnace body; A premixing box is slidably installed on the top of the outer surface of the furnace body. A threaded block is fixedly installed on one side of the outer surface of the premixing box, and an arch is fixedly installed on the top of the premixing box. A heat storage chamber is opened in the middle of the top of the furnace body. A lifting component is fixedly installed on one side of the outer surface of the furnace body, and the lifting component is used to adjust the height of the premixing box; A collection device is fixedly installed at the bottom inside the premixing box. The collection device includes a connecting block, a collection box, and a collection trough. Two connecting blocks are fixedly installed on both sides inside the dome. The collection box is located at the bottom of the connecting block, and the collection trough is located in the middle of the top of the collection box.

2. A top-fired hot blast stove with interlaced catenary spray nozzles and top outlet as described in claim 1, characterized in that, The lifting component includes a mounting block, a threaded rod, and a blocking block. The mounting block is fixedly installed on one side of the outer surface of the furnace body, the threaded rod is rotatably installed on the top of the mounting block, and the blocking block is fixedly installed on the top of the threaded rod.

3. A top-fired hot blast stove with interlaced catenary spray and top outlet as described in claim 1, characterized in that, A hot air duct is fixedly installed on the top of the arch, and a first combustion valve and a second combustion valve are fixedly installed on the upper and lower sides of the outer surface of the arch, respectively.

4. A top-fired hot blast stove with interlaced catenary spray nozzles and top outlet as described in claim 1, characterized in that, The bottom of the outer surface of the furnace body is provided with a flue valve and a cold air valve on both sides respectively.

5. A top-fired hot blast stove with interlaced catenary spray nozzles and top outlet as described in claim 2, characterized in that, The threaded block is threadedly engaged with the outer surface of the threaded rod. A servo motor is installed inside the mounting block, and the output shaft end of the servo motor is fixedly connected to the bottom end of the threaded rod via a coupling.

6. A top-fired hot blast stove with interlaced catenary spray nozzles and top outlet as described in claim 1, characterized in that, Fixing blocks are fixedly installed on both sides of the surface of the collection box. A connecting hole is opened in the middle of one side of the fixing block. A second threaded hole is opened on both sides of the surface of the collection box, and a bolt is engaged in the internal thread of the second threaded hole.

7. A top-fired hot blast stove with a catenary-shaped cross-flow spray nozzle and top outlet as described in claim 1, characterized in that, A first threaded hole is provided on one side of the outer surface of the connecting block.

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