A waste heat utilization system for a submerged arc furnace cover

Abstract

The present invention relates to the field of waste heat recovery technology, and in particular to a waste heat utilization system for a furnace cover of an electric arc furnace, comprising a furnace cover frame, a heat insulation cover, a steam drum, a circulating water pump, a filter box and a switching mechanism. The inner serpentine coil of the furnace cover frame is made of a steel pipe, and an electrode area and a smoke exhaust area are reserved. The heat insulation cover is detachably connected to the outer side of the furnace cover frame, and the steam drum is arranged on the top side of the furnace cover frame. The present invention utilizes a steam drum to complete water vapor separation, circulates water to cool the furnace cover, recycles steam, and utilizes the heat energy generated during the cooling process of the furnace cover to convert it into electrical energy, thereby realizing energy reuse, reducing energy consumption, and reducing environmental pollution. During the water circulation cooling process, the circulating water is filtered in the filter box, so that the filtered debris is collected in the dust collecting pipe to prevent the conveying pipeline from being blocked, and the circulation water circuit is ensured to be unobstructed. The use is convenient and safe, and meets people's use needs.

Description

Technical Field

[0001] The invention relates to the technical field of waste heat recovery, and in particular to a waste heat utilization system for a furnace cover of an electric arc furnace. Background Art

[0002] During the smelting process of the ore-heat furnace, the furnace cover is used on various types of semi-sealed or closed ore-heat furnaces. Its main functions are: 1. Collect the high-temperature, toxic and dusty furnace gas generated in the smelting process to improve the working environment and save energy and reduce emissions; 2. Reduce the heat loss in the electric furnace to protect the working environment; 3. Meet the structural requirements of electrode insertion, feeding, collecting and discharging furnace gas, and fire observation and ramming in the ore-heat furnace; 4. Cool down the furnace cover itself to prevent itself from burning and protect other equipment connected to it.

[0003] However, the current furnace cover technology is very backward, with a short service life and high energy consumption. When the furnace is working, a large amount of heat energy is transferred to the furnace cover through heat conduction and radiation, resulting in the furnace cover operating temperature reaching over 1000°C. In order to prevent the furnace cover from being damaged by high temperature, the traditional method is to set up a circulating water cooling system inside the furnace cover, use cold water to absorb the heat of the furnace cover, and then cool the hot water through a cooling tower before recycling it. However, although this method can effectively protect the furnace cover, it fails to make full use of the large amount of heat energy taken away, resulting in a huge waste of energy. In addition, during the water cooling process, it is necessary to add a filter to the cooling path to prevent debris from blocking the pipeline and affecting the water circulation. However, the filter device needs to be replaced regularly. Since the furnace cover of the mine furnace is generally high, it is more troublesome to replace it. Summary of the invention

[0004] In order to solve the problems of heat energy waste and troublesome filter replacement, the present invention provides a system for utilizing residual heat from a furnace cover of an electric arc furnace.

[0005] The present invention provides a submerged arc furnace cover waste heat utilization system adopts the following technical solution:

[0006] A submerged arc furnace cover waste heat utilization system, comprising:

[0007] The furnace cover frame has a steel pipe in a serpentine coil inside, and has an electrode area and a smoke exhaust area;

[0008] A heat insulation cover, which is detachably connected to the outside of the furnace cover frame, and a support plate is fixedly connected to the heat insulation cover;

[0009] A steam drum is mounted on the support plate, and a plurality of connecting pipes are integrally fixedly connected to the outer side of the steam drum, one of the connecting pipes is fixedly connected to a feed water flow meter, and a top outer wall of the steam drum is fixedly connected to a flue gas pipe;

[0010] A circulating water pump, which is fixedly connected to the top of the heat insulation cover, and an inclined delivery pipe is connected between the steam drum and the circulating water pump;

[0011] A filter box is arranged between the steam drum and the circulating water pump, and the inclined delivery pipe runs through the filter box, and a vertically arranged dust collecting pipe is detachably connected to the outer wall of the inclined delivery pipe;

[0012] A switching mechanism is arranged on the inner side of the filter box and located on the bottom side of the dust collecting pipe. The switching mechanism includes a driving module and a loading and unloading module. The driving module controls the rotation of the loading and unloading module, and the loading and unloading module controls the movement of the dust collecting pipe. A section of the outer wall of the inclined conveying pipe close to the circulating water pump is fixedly connected to a branch pipe, and the output end of the branch pipe is connected to a solenoid valve. The output end of the branch pipe is higher than the dust collecting pipe.

[0013] By adopting the above technical scheme, water-steam separation is completed in the steam drum, water is circulated to cool the furnace cover, steam is recycled, and the heat energy generated in the cooling process of the furnace cover is converted into electrical energy, thereby realizing energy reuse, reducing energy consumption, and reducing environmental pollution. In the process of water circulation cooling, the circulating water is filtered in the filter box, so that the filtered debris is collected in the dust collecting pipe to prevent the conveying pipeline from being blocked. When the dust collecting pipe needs to be replaced, the dust collecting pipe is automatically disassembled and replaced through the switching mechanism, and it is also convenient to use the water filtered by the branch pipe to clean the dust collecting pipe when it is used next time, without excessive manual intervention, and it is convenient and safe to use.

[0014] Optionally, an end of the inclined delivery pipe close to the circulating water pump is higher than an end away from the circulating water pump.

[0015] By adopting the above technical solution, it is ensured that the debris in the water can settle into the dust collecting pipe under the action of gravity for collection.

[0016] Optionally, the driving module includes a first motor, a turntable and a hydraulic rod, the first motor is fixedly connected in the filter box, the turntable is coaxially movably connected to the output shaft of the first motor, the bottom end of the hydraulic rod is fixedly connected to the inner wall of the filter box, and the output end abuts against the bottom end of the turntable.

[0017] By adopting the above technical solution, the first motor is used to control the rotation of the turntable, and the hydraulic rod controls the lifting of the turntable, thereby facilitating the disassembly and assembly of the dust collecting tube in cooperation with the loading and unloading module.

[0018] Optionally, the loading and unloading module includes a second motor, the output shaft of the second motor is coaxially fixedly connected to a connecting rod, the connecting rod is rotatably connected to a U-shaped plate, a fourth motor is arranged on the outer side of the U-shaped plate, the output shaft of the fourth motor is coaxially fixedly connected to a shaft rod penetrating the U-shaped plate, the shaft rod is fixedly connected to the U-shaped plate, the top of the U-shaped plate is fixedly connected to a third motor, the outer wall of the third motor is fixedly connected to a horizontal plate, the inside of the horizontal plate is fixedly connected to a limiting screw rod, the output shaft of the third motor is fixedly connected to a curved rod, both ends of the curved rod are movably connected to slides, the slide is slidably connected to the limiting screw rod, and the outer wall of the slide is fixedly connected to a splint.

[0019] By adopting the above technical solution, the second motor is used to control the connecting rod to drive the horizontal rotation of the U-shaped plate, so that the dust collecting tube can be rotated to complete the disassembly and assembly of the dust collecting tube, and the fourth motor controls the U-shaped plate to rotate in the vertical direction, so that it is convenient to pour out the internal debris of the dust collecting tube after cleaning, and the third motor is used to control the rotation of the curved rod, so as to facilitate the control of the slide plate to drive the movement of the clamping plate to achieve the clamping and unlocking of the dust collecting tube.

[0020] Optionally, a plurality of loading and unloading modules are provided, and the dust collecting pipes are installed on the loading and unloading modules at intervals.

[0021] By adopting the above technical solution, the dust collecting pipe is convenient to store, and can be automatically replaced and cleaned regularly to ensure the smooth flow of the circulating water channel.

[0022] Optionally, two circulating water pumps are provided, and the output end of the circulating water pump is fixedly connected to a steel pipe, and the steel pipe is divided into multiple groups, each group forming an independent water cooling cover.

[0023] By adopting the above technical solution and utilizing the grouped design of the steel pipes, the arrangement can be made according to the distribution of the electrodes, thereby effectively cooling the area around each electrode.

[0024] Optionally, flat steel is used to seal between the steel pipes, and each group of the steel pipes is provided with a water inlet and a water outlet.

[0025] By adopting the above technical solution, heat is prevented from directly contacting the heat insulation cover, and the heat is conducted to the heat insulation cover to cause energy loss.

[0026] Optionally, a pressing plate is detachably connected between the furnace cover frame and the heat insulation cover, and the pressing plate is arranged in the electrode area.

[0027] By adopting the above technical solution, the stability of the connection between the furnace cover frame and the heat insulation cover is ensured.

[0028] Optionally, each group of the steel pipes is also fixedly connected to an auxiliary drainage pipe extending to the outside of the heat insulation cover.

[0029] By adopting the above technical solution, the water in the steel pipe can be quickly discharged using the auxiliary drainage pipe.

[0030] In summary, the present invention includes at least one of the following beneficial technical effects:

[0031] (1) The steam drum is used to separate water and steam, and the water is circulated to cool the furnace cover. The steam is recycled and the heat energy generated during the cooling process of the furnace cover is converted into electrical energy, thereby realizing energy reuse, reducing energy consumption, and reducing environmental pollution. During the water circulation cooling process, the circulating water is filtered in the filter box, and the filtered debris is collected in the dust collecting pipe to prevent the transmission pipeline from being blocked, thus ensuring the smooth circulation of the waterway;

[0032] (2) When the dust collecting tube needs to be replaced, the dust collecting tube can be automatically disassembled and replaced through the switching mechanism. It is also convenient to use the water filtered by the branch pipe to clean the dust collecting tube the next time it is used. There is no need for excessive manual intervention. It is convenient and safe to use, meeting people's usage needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a three-dimensional structural schematic diagram of a submerged arc furnace cover waste heat utilization system in this embodiment.

[0034] Figure 2 It is a schematic diagram of the three-dimensional structure of the internal local pipeline distribution of a submerged arc furnace cover waste heat utilization system in this embodiment.

[0035] Figure 3 It is a schematic diagram of the top view of the structure of a system for utilizing waste heat from a furnace cover of an electric arc furnace in this embodiment.

[0036] Figure 4 It is a schematic diagram of the furnace cover frame structure of a submerged arc furnace furnace cover waste heat utilization system in this embodiment.

[0037] Figure 5 It is a schematic diagram of the internal structure of a filter box of a submerged arc furnace cover waste heat utilization system in this embodiment.

[0038] Figure 6 It is a schematic diagram of the clamping structure of a system for utilizing waste heat from a furnace cover of an electric arc furnace in this embodiment.

[0039] Figure 7 It is a schematic diagram of the working principle structure of a system for utilizing waste heat from a furnace cover of an electric arc furnace in this embodiment.

[0040] Figure 8 In this embodiment Figure 5 Enlarged structural diagram at A in the middle.

[0041] Description of reference numerals:

[0042] 1. Furnace cover frame; 11. Electrode area; 12. Smoke exhaust area; 13. Pressed plate; 14. Auxiliary drain pipe; 15. Steel pipe; 2. Heat insulation cover; 21. Support plate; 3. Steam drum; 31. Connecting pipe; 32. Feed water flow meter; 33. Inclined conveying pipe; 331. Branch pipe; 332. Solenoid valve; 333. Dust collecting pipe; 34. Flue gas pipe; 4. Circulating water pump; 5. Filter box; 6. Switching mechanism; 61. First motor; 62. Turntable; 63. Hydraulic rod; 64. Loading and unloading module; 641. Second motor; 642. Connecting rod; 643. Fourth motor; 644. Third motor; 645. Clamp; 646. Limit screw rod; 647. Bending rod; 648. Slide plate. DETAILED DESCRIPTION

[0043] The following is combined with Figure 1-Figure 8 The present invention is described in further detail.

[0044] The embodiment of the invention discloses a system for utilizing waste heat from a furnace cover of an electric arc furnace.

[0045] It should be noted that, in the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0046] Reference Figure 1-Figure 8 , a submerged arc furnace cover waste heat utilization system, comprising:

[0047] The furnace cover frame 1 has a steel pipe 15 in the form of a serpentine coil on the inner side, and has an electrode area 11 and a smoke exhaust area 12;

[0048] A heat shield 2 is detachably connected to the outside of the furnace cover frame 1, and a support plate 21 is fixedly connected to the heat shield 2;

[0049] The drum 3 is mounted on the support plate 21, and a plurality of connecting pipes 31 are integrally fixedly connected to the outer side thereof, one of which is fixedly connected to a feed water flow meter 32, and a flue gas pipe 34 is fixedly connected to the outer wall of the top of the drum 3, and the flue gas pipe 34 is externally connected to an exhaust device, and the connecting pipe 31 is connected to an output port of the waste heat boiler economizer, such as Figure 7 As shown;

[0050] A circulating water pump 4 is fixedly connected to the top of the heat insulation cover 2. An inclined delivery pipe 33 is connected between the steam drum 3 and the circulating water pump 4 to facilitate the circulation of water;

[0051] The filter box 5 is arranged between the drum 3 and the circulating water pump 4, and the inclined delivery pipe 33 runs through the filter box 5. The outer wall of the inclined delivery pipe 33 is detachably connected with a vertically arranged dust collecting pipe 333. The dust collecting pipe 333 is convenient for uniformly collecting the filtered debris to prevent clogging of the normal water circulation pipeline. It should be noted that two filter screens are arranged inside the inclined delivery pipe 33, and the dust collecting pipe 333 is located between the two filter screens. The aperture of the filter screen at the higher end of the inclined delivery pipe 33 is smaller than the aperture of the filter screen at the lower end of the inclined delivery pipe 33. The filter screen is a prior art and is not shown in the drawings, so no further description is made.

[0052] The switching mechanism 6 is arranged on the inner side of the filter box 5 and is located on the bottom side of the dust collecting pipe 333. The switching mechanism 6 includes a driving module and a loading and unloading module 64. The driving module controls the rotation of the loading and unloading module 64, and the loading and unloading module 64 controls the movement of the dust collecting pipe 333. A section of the outer wall of the inclined conveying pipe 33 close to the circulating water pump 4 is fixedly connected to a branch pipe 331. The output end of the branch pipe 331 is connected to a solenoid valve 332, which controls the water to flow out of the branch pipe 331 to complete the cleaning of the branch pipe 331. The output end of the branch pipe 331 is higher than the dust collecting pipe 333.

[0053] Specifically, at work, Figure 7As shown, the feed water from the waste heat boiler water supply main pipe is first heated to 180℃-220℃ by the waste heat boiler economizer, and its outlet water is divided into two paths, one to the original waste heat boiler drum, and the other to the steam drum 3 of this system. A feed water flow meter 32 is set in its pipeline, and a bypass system is required. When the waste heat boiler is under maintenance or fails, water is directly taken from the waste heat boiler water supply main pipe to the steam drum 3 to ensure the stability of the system operation. The hot water in the steam drum 3 passes through the downcomer and the filter box 5 to filter impurities, and then passes through the circulating water pump 4 to increase power and then enter the water-cooled furnace cover in multiple paths. An isolation valve is installed before and after the circulating water pump 4 to cut off the water circuit when the circulating water pump 4 fails to overhaul; the circulating water circuit needs to pass through a throttling hole ring before entering the water-cooled furnace cover, and its size is determined according to the system resistance of each branch pipeline, and the water flow of each group of circulating pipelines needs to be guaranteed; when the hot water enters the serpentine coil of the water-cooled furnace cover, it is heated by the radiation and electromagnetic loss heat energy in the ore-heating furnace. into a steam-water mixture, and then enters the steam drum 3; steam-water separation is performed in the steam drum 3, wherein water continues to be heated through the above-mentioned circulation system to generate steam, and the separated steam is sent to the superheater of the original waste heat boiler, and the superheated steam after heating is sent to the steam turbine together with the superheated steam generated by the waste heat boiler to do work and generate electricity; a bypass system needs to be set on the outlet pipeline of the steam drum 3 to be connected to the main steam mother pipe in the waste heat power generation system, and the bypass system is opened when the boiler is under maintenance or fails to ensure the stable operation of the ore-fired furnace, wherein the loading and unloading of the dust collecting pipe 333 can be controlled by the loading and unloading module 64. It should be noted that the superheater, steam turbine, waste heat boiler and waste heat boiler economizer involved in the working process are existing products in the industrial ore furnace smelting system, and will not be described in detail. The waste heat utilization device can recycle the waste heat of the furnace cover. According to calculation, a 40500kVA electric furnace can recover about 400kW of electricity.

[0054] Reference Figure 1 and Figure 5 Specifically, in the embodiment of the present invention, an end of the inclined delivery pipe 33 close to the circulating water pump 4 is higher than an end away from the circulating water pump 4.

[0055] In the embodiment of the present invention, when in use, circulating water is transported from the lower end of the inclined delivery pipe 33 to the higher end, which facilitates the sliding and settling of debris.

[0056] Reference Figure 5 and Figure 8 Specifically, in the embodiment of the present invention, the driving module includes a first motor 61, a turntable 62 and a hydraulic rod 63. The first motor 61 is fixedly connected in the filter box 5, the turntable 62 is coaxially movably connected with the output shaft of the first motor 61, the bottom end of the hydraulic rod 63 is fixedly connected to the inner wall of the filter box 5, and the output end abuts against the bottom end of the turntable 62.

[0057] In the embodiment of the present invention, when working, the first motor 61 controls the rotation of the turntable 62, thereby driving the loading and unloading module 64 to move synchronously, and then driving the dust collecting tube 333 to switch positions. The hydraulic rod 63 can change the rotation height of the turntable 62, thereby facilitating the disassembly and assembly of the dust collecting tube 333.

[0058] Reference Figure 5 and Figure 8 Specifically, in the embodiment of the present invention, the loading and unloading module 64 includes a second motor 641, the output shaft of the second motor 641 is coaxially fixedly connected with a connecting rod 642, the connecting rod 642 is rotatably connected with a U-shaped plate, a fourth motor 643 is arranged on the outer side of the U-shaped plate, the output shaft of the fourth motor 643 is coaxially fixedly connected with a shaft rod penetrating the U-shaped plate, the shaft rod is fixedly connected to the U-shaped plate, the top of the U-shaped plate is fixedly connected with a third motor 644, the outer wall of the third motor 644 is fixedly connected with a horizontal plate, the inside of the horizontal plate is fixedly connected with a limiting screw rod 646, the output shaft of the third motor 644 is fixedly connected with a curved rod 647, both ends of the curved rod 647 are movably connected with a slide plate 648, the slide plate 648 is slidably connected to the limiting screw rod 646, and the outer wall of the slide plate 648 is fixedly connected with a clamping plate 645.

[0059] In the embodiment of the present invention, when the dust collecting tube 333 needs to be replaced and cleaned, the loading and unloading module 64 is first rotated to the bottom of the dust collecting tube 333 by the driving module, and the third motor 644 works to control the slide plate 648 to slide along the limiting screw rod 646, driving the clamping plate 645 to clamp the dust collecting tube 333, and the second motor 641 is started to control the U-shaped plate to rotate, so that the dust collecting tube 333 is rotated and separated from the inclined conveying tube 33, and the turntable 62 continues to rotate, and the second motor 641 controls the U-shaped plate to rotate in the opposite direction, and the cleaner dust collecting tube 333 is connected to the inclined conveying tube 33, wherein the fourth motor 643 controls the dust collecting tube 333 containing debris inside to rotate in the vertical direction to pour out the internal debris, wherein, when the water is circulated again, part of the water can be controlled by the solenoid valve 332 to enter the dust collecting tube 333 for flushing, thereby improving the cleaning effect.

[0060] Reference Figure 5 Specifically, in the embodiment of the present invention, a plurality of loading and unloading modules 64 are provided, and the dust collecting pipes 333 are installed on the loading and unloading modules 64 at intervals.

[0061] In the embodiment of the present invention, the disassembly station and the cleaning station are isolated to prevent interference between the two.

[0062] Reference Figure 1-Figure 3Specifically, in the embodiment of the present invention, two circulating water pumps 4 are provided, and the output end of the circulating water pump 4 is fixedly connected to the steel pipe 15. The steel pipe 15 is divided into multiple groups, each group forms an independent water-cooled cover, and the steel pipes 15 are sealed with flat steel. Each group of steel pipes 15 is provided with a water inlet and a water outlet. Each group of steel pipes 15 is also fixedly connected to an auxiliary drain pipe 14 extending to the outside of the heat insulation cover 2.

[0063] In the embodiment of the present invention, the installation of the steel pipe 15 can be matched according to the actual distribution of the electrodes, so that targeted cooling can be performed during water circulation. When draining water, rapid drainage can be performed through the auxiliary drainage pipe 14. It should be noted that a control valve is installed on each auxiliary drainage pipe 14 to prevent water from flowing out at will.

[0064] Reference Figure 1 Specifically, in the embodiment of the present invention, a pressing plate 13 is detachably connected between the furnace cover frame 1 and the heat insulation cover 2 , and the pressing plate 13 is arranged in the electrode area 11 .

[0065] In the embodiment of the present invention, the tightness of the connection between the furnace cover frame 1 and the heat insulation cover 2 is ensured by the pressing plate 13 .

[0066] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A system for utilizing waste heat from a submerged arc furnace roof, characterized in that: include: A furnace cover frame (1) having a steel pipe (15) formed in a serpentine coil on its inner side and having an electrode area (11) and a smoke exhaust area (12); A heat insulation cover (2) which is detachably connected to the outside of the furnace cover frame (1), and a support plate (21) is fixedly connected to the heat insulation cover (2); A steam drum (3) is mounted on the support plate (21), and a plurality of connecting pipes (31) are integrally fixedly connected to the outer side of the steam drum, one of the connecting pipes (31) is fixedly connected to a feed water flow meter (32), and a top outer wall of the steam drum (3) is fixedly connected to a flue gas pipe (34); A circulating water pump (4) fixedly connected to the top of the heat insulation cover (2), an inclined delivery pipe (33) being connected between the steam drum (3) and the circulating water pump (4); A filter box (5) is arranged between the steam drum (3) and the circulating water pump (4), and the inclined delivery pipe (33) passes through the filter box (5), and the outer wall of the inclined delivery pipe (33) is detachably connected to a vertically arranged dust collecting pipe (333); A switching mechanism (6) is arranged on the inner side of the filter box (5) and located at the bottom side of the dust collecting pipe (333); the switching mechanism (6) comprises a driving module and a loading and unloading module (64); the driving module controls the loading and unloading module (64) to rotate; the loading and unloading module (64) controls the movement of the dust collecting pipe (333); a section of the outer wall of the inclined conveying pipe (33) close to the circulating water pump (4) is fixedly connected to a branch pipe (331); an output end of the branch pipe (331) is connected to a solenoid valve (332); and the output end of the branch pipe (331) is higher than the dust collecting pipe (333).

2. The system for utilizing waste heat from a submerged arc furnace roof according to claim 1, characterized in that: An end of the inclined delivery pipe (33) close to the circulating water pump (4) is higher than an end away from the circulating water pump (4).

3. The residual heat utilization system of a submerged arc furnace roof according to claim 1, characterized in that: The driving module comprises a first motor (61), a rotating disk (62) and a hydraulic rod (63); the first motor (61) is fixedly connected in the filter box (5); the rotating disk (62) is coaxially movably connected to an output shaft of the first motor (61); the bottom end of the hydraulic rod (63) is fixedly connected to an inner wall of the filter box (5); and the output end abuts against the bottom end of the rotating disk (62).

4. The residual heat utilization system of a submerged arc furnace roof according to claim 1, characterized in that: The loading and unloading module (64) comprises a second motor (641), the output shaft of the second motor (641) is coaxially fixedly connected to a connecting rod (642), the connecting rod (642) is rotatably connected to a U-shaped plate, a fourth motor (643) is arranged on the outer side of the U-shaped plate, the output shaft of the fourth motor (643) is coaxially fixedly connected to a shaft rod penetrating the U-shaped plate, the shaft rod is fixedly connected to the U-shaped plate, the top of the U-shaped plate is fixedly connected to a third motor (644), the outer wall of the third motor (644) is fixedly connected to a horizontal plate, the interior of the horizontal plate is fixedly connected to a limiting screw rod (646), the output shaft of the third motor (644) is fixedly connected to a bent rod (647), both ends of the bent rod (647) are movably connected to a slide plate (648), the slide plate (648) is slidably connected to the limiting screw rod (646), and the outer wall of the slide plate (648) is fixedly connected to a clamping plate (645).

5. The residual heat utilization system of a submerged arc furnace roof according to claim 1, characterized in that: A plurality of the loading and unloading modules (64) are provided, and the dust collecting pipes (333) are installed at intervals on the loading and unloading modules (64).

6. The residual heat utilization system of a submerged arc furnace roof according to claim 1, characterized in that: Two circulating water pumps (4) are provided, and the output end of the circulating water pump (4) is fixedly connected to a steel pipe (15). The steel pipe (15) is divided into multiple groups, and each group forms an independent water cooling cover.

7. The residual heat utilization system of a submerged arc furnace roof according to claim 1, characterized in that: Flat steel is used to seal the steel pipes (15), and each group of the steel pipes (15) is provided with a water inlet and a water outlet.

8. The system for utilizing waste heat from a submerged arc furnace roof according to claim 1, characterized in that: A pressing plate (13) is detachably connected between the furnace cover frame (1) and the heat insulation cover (2), and the pressing plate (13) is arranged in the electrode area (11).

9. The system for utilizing waste heat from a submerged arc furnace roof according to claim 7, characterized in that: Each group of the steel pipes (15) is also fixedly connected to an auxiliary drainage pipe (14) extending to the outside of the heat insulation cover (2).

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