Heating furnace door thermal radiation isolation system and application

Abstract

The invention discloses a heating furnace door thermal radiation isolation system and application, the heating furnace door thermal radiation isolation system comprises a high-temperature protection assembly arranged in a junction area of a heating furnace and casting machine equipment of a continuous casting production line, and the high-temperature protection assembly comprises a first furnace door and a second furnace door arranged in parallel with the first furnace door at an interval; the first furnace door and the second furnace doors which are arranged in parallel at intervals form a double-barrier structure, the distance between the first furnace door and the second furnace doors which are arranged in parallel at intervals is 1000-2000 mm, the distance between the first furnace door and the second furnace doors which are arranged in parallel at intervals is 1200 mm, and the thickness of the air heat insulation layer is larger than or equal to 800 mm. The furnace door thermal radiation isolation system of the heating furnace is suitable for high-temperature protection of a junction area of the heating furnace and casting machine equipment in a continuous casting production line.

Description

Technical Field

[0001] This invention belongs to the field of high-temperature equipment protection technology in the metallurgical industry, specifically relating to a heat radiation isolation system for a heating furnace door and its application. Background Technology

[0002] In continuous casting production lines, the following technical bottlenecks exist in the area connecting the heating furnace outlet and the casting machine: Severe equipment wear: The furnace temperature reaches 1050℃, and the furnace door suffers from sudden heating and cooling shocks due to frequent bursts of the horizontal roller cooling water pipes (an average of 7 bursts per year), resulting in an average of 4 alloy furnace doors being scrapped annually. Uncontrolled heat radiation conduction: Despite the addition of water-cooled fireproof plates, the surface temperature of the casting machine still reaches 90℃, forcing equipment inspections to require process cooling (single shutdown ≥ 2 hours). Existing solutions employ enhanced cooling structures, but cannot block the heat radiation conduction path. Adding heat insulation screens worsens the temperature uniformity of the furnace. The fundamental contradiction lies in the failure to reconstruct the spatial relationship between the heat source and the protected equipment.

[0003] In view of the above factors, a heating furnace door thermal radiation isolation system and its application are provided for high-temperature protection in the interface area between the heating furnace and the casting machine equipment in a continuous casting production line. Summary of the Invention

[0004] The purpose of this invention is to provide a heating furnace door thermal radiation isolation system and its application to solve the problems mentioned in the background art.

[0005] The objective of this invention is achieved through the following technical solution: a heating furnace door thermal radiation isolation system, comprising a high-temperature protection component installed in the interface area between the heating furnace and the casting machine equipment in a continuous casting production line, wherein the high-temperature protection component includes a first furnace door and a second furnace door arranged parallel to and spaced apart from the first furnace door;

[0006] The first furnace door and the second furnace door, which are arranged side by side at intervals, form a double barrier structure.

[0007] Furthermore, the distance between the first furnace door and the second furnace door, which are arranged side by side at intervals, is 1000-2000mm.

[0008] Furthermore, the distance between the first furnace door and the second furnace door arranged in parallel is 1200mm, and the thickness of the air insulation layer is ≥800mm.

[0009] Furthermore, the first furnace door remains normally closed with a sealing pressure ≥0.1MPa, and the second furnace door is raised and lowered using a pneumatic opening and closing device. The pneumatic opening and closing uses a cylinder with a stroke of 800mm and a response time ≤3s.

[0010] Furthermore, the method also includes a fire baffle plate installed at the outlet of the heating furnace in the continuous casting production line. The fire baffle plate includes a metal frame, which includes two horizontal sides and two vertical sides. Multiple horizontal fire baffle plates arranged in the same direction as the horizontal sides are connected between the two vertical sides.

[0011] Furthermore, multiple longitudinal fire baffles arranged in the same direction as the longitudinal side are connected between the two transverse sides, and the multiple transverse fire baffles and multiple longitudinal fire baffles are arranged alternately to form a grid structure for fire blocking.

[0012] Furthermore, the baffle plate is fixed above the furnace opening of the heating furnace in the continuous casting production line, and the baffle plate is detachably connected to the furnace opening of the heating furnace in the continuous casting production line.

[0013] Furthermore, the fire baffle plate is detachably connected to the furnace opening of the heating furnace in the continuous casting production line by bolts.

[0014] The application of a thermal radiation isolation system for a heating furnace door includes the following steps:

[0015] Step 1: Spatial Reconstruction Construction: Install the second furnace door at a distance from the first furnace door, move the power distribution cabinet 1.5m south along the slide rail, and re-lay the high-temperature resistant cable. The high-temperature resistant cable model is YGC-F46R with a cross-sectional area of ​​35mm².

[0016] Step 2: Optimize the thermal system. Remove the original DN50 burner and install a DN80 heat-resistant alloy burner made of ZG40Cr25Ni20. Add a gas regulating valve with a diameter of G3 / 4” and flow characteristics as a percentage.

[0017] Step 3: Install a thermocouple (type K) 300mm above the furnace roller, connect it to the PLC controller, model S7-1500, and set the temperature threshold to 1030℃±10℃.

[0018] Step 4: Dual barrier system activation: The first furnace door remains normally closed with a sealing pressure ≥0.1MPa. The second furnace door is equipped with a pneumatic opening and closing device with a cylinder stroke of 800mm and a response time ≤3s.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] This invention utilizes a spatial reconstruction system to form a double-barrier structure with a first furnace door and a second furnace door arranged in parallel at intervals. This structure is suitable for high-temperature protection in the area where the heating furnace and casting machine meet in a continuous casting production line.

[0021] This invention improves heat-blocking efficiency, reducing the surface temperature of the casting machine from 90℃ to 40℃ (a reduction of 55.6%), and causing a 100% reduction in the incidence of thermal stress cracks in the furnace door (zero scrapping in 18 months after the modification).

[0022] This invention improves equipment lifespan, reducing furnace roller refractory wear from 16 pieces / year to 8 pieces / year (a 50% reduction) and bearing scrap rate from 21.5 sets / year to 8 sets / year (a 62.8% reduction). Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall connection of the present invention;

[0024] Figure 2 This is a schematic diagram of the fire baffle of the present invention;

[0025] Figure 3 This is a schematic diagram of the connection between the thermocouple and the PLC controller of the present invention;

[0026] Figure 4 This is a schematic diagram of the second furnace door closing according to the present invention;

[0027] Figure 5 This is a schematic diagram of the second furnace door opening according to the present invention. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0029] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0030] In the description of this invention, it should be understood that the terms "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 invention 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 invention.

[0031] like Figure 1-5As shown, a heating furnace door thermal radiation isolation system includes a high-temperature protection component 1 installed in the interface area between the heating furnace and the casting machine equipment in the continuous casting production line. The high-temperature protection component 1 includes a first furnace door 2 and a second furnace door 3 arranged parallel to and spaced apart from the first furnace door 2.

[0032] The first furnace door 2 and the second furnace door 3, which are arranged side by side and spaced apart, form a double barrier structure.

[0033] The distance between the first furnace door 2 and the second furnace door 3, which are arranged side by side, is 1000-2000mm.

[0034] The distance between the first furnace door 2 and the second furnace door 3, which are arranged side by side, is 1200mm, and the thickness of the air insulation layer is ≥800mm.

[0035] The above-mentioned double-barrier structure is formed by setting the first furnace door 2 and the second furnace door 3 arranged in parallel and spaced apart, which realizes heat blocking efficiency and improves the service life of the equipment.

[0036] The first furnace door 2 is kept closed with a sealing pressure ≥0.1MPa. The second furnace door 3 is raised and lowered by a pneumatic opening and closing device. The pneumatic opening and closing uses a cylinder with a stroke of 800mm and a response time ≤3s.

[0037] To facilitate primary heat blocking of the baffle plate 4 at the outlet of the heating furnace in the continuous casting production line during use, the system also includes a baffle plate 4 at the outlet of the heating furnace in the continuous casting production line. The baffle plate 4 includes a metal frame 5, which includes two horizontal sides 6 and two vertical sides 7. Multiple horizontal baffle plates 8 arranged in the same direction as the horizontal sides 6 are connected between the two vertical sides 7.

[0038] The two horizontal sides 6 are connected by multiple longitudinal fire baffles 9 arranged in the same direction as the vertical side 7. The multiple horizontal fire baffles 8 and the multiple longitudinal fire baffles 9 are arranged alternately to form a grid structure for fire blocking.

[0039] Multiple transverse fire baffles 8, which are arranged in the same direction as the transverse side 6, are connected between the two longitudinal sides 7 and are connected to one side of the fire baffle 4 by bolts or welding.

[0040] The two transverse sides 6 are connected by multiple longitudinal fire baffles 9 arranged in the same direction as the longitudinal side 7, which are connected to the other side of the fire baffle 4 by bolts or welding.

[0041] In order to facilitate the fire-blocking effect during use, the fire-blocking plate 4 is fixed above the furnace opening of the heating furnace in the continuous casting production line, and the fire-blocking plate 4 is detachably connected to the furnace opening of the heating furnace in the continuous casting production line.

[0042] Install thermocouple 10 300mm above the furnace roller. The thermocouple is of type K. The thermocouple 10 is electrically connected to PLC controller 11. PLC controller 11 is model S7-1500 and the set temperature threshold is 1030℃±10℃.

[0043] A temperature feedback mechanism was established by adding a type K thermocouple (measurement range 0-1200℃) in the furnace roller area. When the furnace temperature is below 1030℃, the firepower of burner #2 will be automatically increased.

[0044] To facilitate replacement during use, the fire baffle is detachably connected to the furnace opening of the continuous casting production line by bolts.

[0045] The application of a thermal radiation isolation system for a heating furnace door includes the following steps:

[0046] Step 1: Spatial Reconstruction Construction: Install the second furnace door at a distance from the first furnace door, move the power distribution cabinet 1.5m south along the slide rail, and re-lay the high-temperature resistant cable. The high-temperature resistant cable model is YGC-F46R with a cross-sectional area of ​​35mm².

[0047] Step 2: Optimize the thermal system. Remove the original DN50 burner and install a DN80 heat-resistant alloy burner made of ZG40Cr25Ni20. Add a gas regulating valve with a diameter of G3 / 4” and flow characteristics as a percentage.

[0048] Step 3: Install a thermocouple (type K) 300mm above the furnace roller, connect it to the PLC controller, model S7-1500, and set the temperature threshold to 1030℃±10℃.

[0049] Step 4: Dual barrier system activation: The first furnace door remains normally closed with a sealing pressure ≥0.1MPa. The second furnace door is equipped with a pneumatic opening and closing device with a cylinder stroke of 800mm and a response time ≤3s.

[0050] The furnace door thermal radiation isolation system is used for high-temperature protection in the area where the heating furnace and casting machine meet in the continuous casting production line.

[0051] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0052] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A thermal radiation isolation system for a heating furnace door, characterized in that: It includes a high-temperature protection component (1) installed in the area where the heating furnace and casting equipment meet in the continuous casting production line. The high-temperature protection component (1) includes a first furnace door (2) and a second furnace door (3) arranged in parallel and spaced apart from the first furnace door (2). The first furnace door (2) and the second furnace door (3) arranged in parallel and spaced apart form a double barrier structure.

2. The furnace door thermal radiation isolation system according to claim 1, characterized in that: The distance between the first furnace door (2) and the second furnace door (3) arranged in parallel is 1000-2000mm.

3. The furnace door thermal radiation isolation system according to claim 1, characterized in that: The distance between the first furnace door (2) and the second furnace door (3) arranged in parallel is 1200mm, and the thickness of the air insulation layer is ≥800mm.

4. The furnace door thermal radiation isolation system according to claim 3, characterized in that: The first furnace door (2) is kept in a normally closed state with a sealing pressure ≥0.1MPa. The second furnace door (3) is raised and lowered by a pneumatic opening and closing device. The pneumatic opening and closing uses a cylinder with a stroke of 800mm and a response time ≤3s.

5. The furnace door thermal radiation isolation system according to claim 4, characterized in that: The description also includes a fire baffle (4) installed at the outlet of the heating furnace in the continuous casting production line. The fire baffle (4) includes a metal frame (5), which includes two horizontal sides (6) and two vertical sides (7). Multiple horizontal fire baffles (8) arranged in the same direction as the horizontal sides (6) are connected between the two vertical sides (7).

6. The furnace door thermal radiation isolation system according to claim 5, characterized in that: The two horizontal sides (6) are connected by multiple longitudinal fire baffles (9) arranged in the same direction as the vertical side (7). The multiple horizontal fire baffles (8) and multiple longitudinal fire baffles (9) are arranged in an alternating manner to form a grid structure for fire protection.

7. The furnace door thermal radiation isolation system according to claim 6, characterized in that: The fire baffle (4) is fixed above the furnace opening of the heating furnace in the continuous casting production line. The fire baffle (4) is detachably connected to the furnace opening of the heating furnace in the continuous casting production line.

8. The furnace door thermal radiation isolation system according to claim 7, characterized in that: The fire baffle (4) is detachably connected to the furnace opening of the heating furnace in the continuous casting production line by bolts.

9. An application of the furnace door thermal radiation isolation system according to claim 8, characterized in that: Includes the following steps: Step 1: Spatial Reconstruction Construction: Install the second furnace door at a distance from the first furnace door, move the power distribution cabinet 1.5m south along the slide rail, and re-lay the high-temperature resistant cable. The high-temperature resistant cable model is YGC-F46R with a cross-sectional area of ​​35mm². Step 2: Optimize the thermal system. Remove the original DN50 burner and install a DN80 heat-resistant alloy burner made of ZG40Cr25Ni20. Add a gas regulating valve with a diameter of G3 / 4” and flow characteristics as a percentage. Step 3: Install a thermocouple (type K) 300mm above the furnace roller, connect it to the PLC controller, model S7-1500, and set the temperature threshold to 1030℃±10℃. Step 4: Dual barrier system activation: The first furnace door remains normally closed with a sealing pressure ≥0.1MPa. The second furnace door is equipped with a pneumatic opening and closing device with a cylinder stroke of 800mm and a response time ≤3s.

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