A scrap steel preheating charging device and a heating furnace cover

Abstract

The utility model relates to the technical field of scrap steel smelting, and specifically to a scrap steel preheating and feeding device and a heating furnace cover. The scrap steel preheating and feeding device comprises a conveying mechanism, a heating furnace cover and a cooling medium circulation system. The heating furnace cover is arranged above the conveying mechanism and cooperates with the conveying mechanism to form a preheating and conveying channel. Support members and end blocks are arranged at both ends of the bottom of the heating furnace cover. Cooling medium circulation cavities are arranged in the support members and the end blocks. The cooling medium circulation system is connected with each cooling medium circulation cavity and drives the cooling medium to circulate between the cooling medium circulation system and each cooling medium circulation cavity to achieve cooling of the support members and the end blocks. A first clearance gap is reserved between the support member and the conveying mechanism, a smoke blocking member is arranged in the first clearance gap, a water sealing knife is arranged at the end of the first clearance gap on the feeding mechanism, and the water sealing knife cooperates with a water sealing groove on a supporting platform to prevent the high-temperature smoke of the preheating and conveying channel from being lost.

Description

Technical Field

[0001] The utility model relates to the technical field of scrap steel smelting, in particular to a scrap steel preheating and charging device and a heating furnace cover. Background Art

[0002] The charging device of the smelting furnace is generally used in conjunction with the exhaust hood. For electric smelting furnaces, the charging device feeds the furnace while the high-temperature flue gas in the furnace can flow back along the exhaust hood to preheat the scrap steel on the charging device, thereby reducing the energy consumption of the smelting furnace and accelerating the smelting process. For medium-frequency furnaces and converters, due to the characteristics of medium-frequency furnaces and converters, the heat in the furnace is almost unavailable to the outside world, especially for converters. Smelting in the furnace will also produce combustible gases such as coal gas. It is necessary to set a burner at the charging device to burn the combustible gas, and use combustion to preheat the scrap steel in the charging device.

[0003] When a burner is installed at the feeding device, the exhaust hood is easily deformed due to long-term baking, resulting in reduced sealing between the exhaust hood and the feeding device, heat in the exhaust hood dissipates and cold air outside the exhaust hood enters, affecting the preheating effect and smelting effect of the scrap steel. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a scrap steel preheating and charging device, which can prevent the equipment from being deformed by being roasted and avoid temperature loss while realizing the scrap steel preheating and charging.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a scrap steel preheating and feeding device, including a conveying mechanism, a heating furnace hood and a cooling medium circulation system, support platforms are arranged on both sides of the conveying mechanism, support members are arranged at both ends of the bottom of the heating furnace hood, a cooling medium circulation cavity is arranged in the support members, two support members are respectively connected to the two support platforms, and the inner end surface of the heating furnace hood and the conveying surface of the conveying mechanism form a preheating conveying channel, and a burner for spraying fire into the preheating conveying channel is also arranged on the heating furnace hood. A first clearance gap is reserved between the conveying mechanism and the two support members, and an end stopper is also arranged at the end of each support member located in the preheating conveying channel, a cooling medium circulation cavity is also arranged in the end stopper, and a second clearance gap is reserved between the end stopper and the conveying mechanism, and the second clearance gap is smaller than the first clearance gap, and the cooling medium circulation system is connected with each cooling medium circulation cavity and drives the cooling medium to circulate between the cooling medium circulation system and each cooling medium circulation cavity.

[0006] Support platforms are arranged on both sides of the conveying mechanism. The heating furnace hood is arranged above the conveying mechanism through two support platforms and cooperates with the conveying mechanism to form a preheating conveying channel. The preheating conveying channel is communicated with the charging port of the smelting furnace. A burner is arranged on the heating furnace hood. Support members are arranged at both ends of the bottom of the heating furnace hood. End blocks are arranged at one end of the support members. Cooling medium circulation cavities are arranged in the support members and the end blocks, and each cooling medium circulation cavity is connected to a cooling medium circulation system. The cooling medium circulates in each cooling medium circulation cavity to avoid deformation of the heating furnace hood due to heat. The end blocks cooperate with the conveying mechanism to reduce the amount of high-temperature flue gas lost between the support members and the conveying mechanism and reduce heat loss.

[0007] As a preferred solution of the utility model, a smoke blocking member is arranged in the first clearance gap, and the smoke blocking member includes an upper baffle and a lower baffle, the upper baffle is arranged on the bottom surface of the support member, and the lower baffle is arranged on the conveying mechanism, the lower edge of the upper baffle is lower than the upper edge of the lower baffle, and the upper baffle and the lower baffle are arranged alternately in sequence from the inside of the heating furnace cover to the outside of the heating furnace cover. The first smoke blocking member is in the first clearance gap, which increases the difficulty of high-temperature smoke to dissipate from the preheating conveying channel, thereby avoiding heat loss.

[0008] As a preferred solution of the utility model, there are at least two upper baffles and two lower baffles.

[0009] As a preferred solution of the utility model, water seal grooves are provided on both support platforms, which are connected to the cooling medium circulation system, and water seal knives are provided on both sides of the conveying mechanism, which extend into the two water seal grooves and cooperate with the cooling medium in the two water seal grooves. The other end of the first clearance gap is blocked by water sealing, which can further prevent the loss of high-temperature smoke and thus prevent heat loss.

[0010] As a preferred solution of the utility model, the heating furnace cover is a U-shaped cover body, and the burner is arranged on the top plate of the heating furnace cover.

[0011] As a preferred solution of the utility model, the conveying mechanism is a vibrating feeder, and the amplitude of the conveying mechanism is smaller than the second clearance gap.

[0012] Based on the same concept, the utility model also provides a technical solution, a heating furnace hood, a burner mounting position is arranged on the top plate of the heating furnace hood, support members are arranged at both ends of the bottom of the heating furnace hood, one end of the support member extends out of the heating furnace hood and is provided with a supporting connection portion, and an end stopper is arranged at the other end of the support member, and the bottom end of the end stopper is lower than the bottom surface of the support member, and cooling medium circulation cavities are arranged inside the end stopper and the support member, and the cooling medium circulation cavities are connected, and a cooling medium circulation system connection port is also arranged on the support member.

[0013] As a preferred solution of the utility model, at least one upper baffle is provided on the bottom surface of the support member from the end baffle toward the support portion, and the upper baffle is perpendicular to the bottom surface of the support member.

[0014] As a preferred solution of the utility model, the heating furnace cover is a U-shaped cover.

[0015] Compared with the prior art, the utility model has the following beneficial effects: 1. The heating furnace cover is supported above the conveying mechanism by the support member, and cooperates with the conveying mechanism to form a preheating feeding channel. The support member and the end stopper are provided with a cooling medium circulation cavity. The cooling medium circulation system is connected with each cooling medium circulation cavity and drives the cooling medium to circulate between the cooling medium circulation system and each cooling medium circulation cavity, cools the support member and the end stopper, and avoids the support member and the end stopper from being roasted and deformed for a long time; 2. Since the conveying mechanism is mostly a vibrating feeder A first clearance gap is reserved between the support member and the conveying mechanism to avoid collision between the conveying mechanism and the heating furnace hood during the feeding process. An end stopper is arranged near the end of the preheating feeding channel of the first clearance gap to preliminarily prevent leakage of high-temperature flue gas in the preheating feeding channel. A flue gas blocking member is arranged in the first clearance gap to further prevent leakage of high-temperature flue gas. The end of the first clearance gap away from the preheating feeding channel is water-sealed by a water sealing knife and a water sealing groove, thereby fully blocking the high-temperature flue gas in the preheating conveying channel and preventing heat loss caused by leakage of high-temperature flue gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a structural schematic diagram of a scrap steel preheating heating device;

[0018] Figure 2 for Figure 1 The enlarged schematic diagram of point A in the middle;

[0019] Figure 3 It is a structural schematic diagram of a heating furnace cover;

[0020] In the figure: 1. conveying mechanism, 11. lower baffle, 12. water seal knife, 2. supporting platform, 21. water seal groove, 3. heating furnace cover, 31. supporting member, 32. cooling medium circulation cavity, 33. end baffle, 34. upper baffle, 35. burner installation position. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] like Figure 1 and Figure 2 As shown, Example 1 of the utility model provides a scrap steel preheating and feeding device to solve the technical problem that the exhaust hood is deformed due to continuous burning of the burner, which affects the preheating effect of the scrap steel. The scrap steel preheating device comprises a conveying mechanism 1, a heating furnace hood 3 and a cooling medium circulation system. Support platforms 2 are arranged on both sides of the conveying mechanism 1. Support members 31 are arranged at both ends of the bottom of the heating furnace hood 3. A cooling medium circulation cavity 32 is arranged in the support member 31. The two support members 31 are respectively connected to the two support platforms 2, and the inner end surface of the heating furnace hood 3 and the conveying surface of the conveying mechanism 1 form a preheating conveying channel. A burner for spraying fire into the preheating conveying channel is also arranged on the heating furnace hood 3. A first clearance gap is reserved between the conveying mechanism 1 and the two support members 31. An end stopper 33 is also arranged at the end of each support member 31 located in the preheating conveying channel. A cooling medium circulation cavity 32 is also arranged in the end stopper 33, and a second clearance gap is reserved between the end stopper 33 and the conveying mechanism 1. The second clearance gap is smaller than the first clearance gap. The cooling medium circulation system is connected with each cooling medium circulation cavity 32 and drives the cooling medium to circulate between the cooling medium circulation system and each cooling medium circulation cavity 32.

[0023] Specifically, the conveying mechanism 1 is used to feed materials to the smelting furnace. Support platforms 2 are provided on both sides of the conveying mechanism 1. The support platforms 2 are used to install the heating furnace cover 3. Since vibrating feeders are mostly used in scrap steel smelting, the support platforms 2 on both sides of the conveying mechanism 1 also play an isolation role to prevent operators from getting close to and accidentally touching the vibrating feeder and getting injured.

[0024] Support members 31 are provided at both ends of the bottom of the heating furnace hood 3, and the two support members 31 are respectively connected to the two support platforms 2 located on both sides of the conveying mechanism 1. The heating furnace hood 3 is arranged above the conveying mechanism 1 through the two support members 31, and the inner end surface of the heating furnace hood 3 cooperates with the conveying surface of the conveying mechanism 1 to form a preheating conveying channel. One end of the heating furnace hood 3 is connected with the feeding port or the smoke outlet of the smelting furnace. The scrap steel transported by the conveying mechanism 1 moves toward the smelting furnace in the preheating conveying channel, and at the same time, the high-temperature flue gas in the smelting furnace also moves toward the outside of the smelting furnace along the preheating conveying channel. A burner is provided on the heating furnace hood 3, and the combustion end of the burner faces the preheating conveying channel. Each burner sprays fire into the preheating conveying channel for heating, and burns the coal gas and other combustible gases generated by smelting in the smelting furnace.

[0025] Since the conveying mechanism 1 mostly adopts a vibrating feeder, in order to avoid collision between the conveying mechanism 1 and the heating furnace hood 3 when conveying scrap steel, a first clearance gap is reserved between the conveying mechanism 1 and the two support members 31. In order to prevent the high-temperature flue gas in the preheating conveying channel from being discharged through the first clearance gap, an end stopper 33 is provided at the end of the support member 31 located in the preheating channel. The lower edge of the end stopper 33 is lower than the bottom surface of the support member 31. A second clearance gap is reserved between the end stopper 33 and the conveying mechanism 1. The second clearance gap is smaller than the first clearance gap. The end stopper 33 blocks the high-temperature flue gas in the preheating conveying channel from entering the first clearance gap to a certain extent.

[0026] A cooling medium circulation cavity 32 is provided in the support member 31 and the end stop member 33. The cooling medium circulation system is connected to each cooling medium circulation cavity 32. Driven by the cooling medium circulation system, the cooling medium circulates between the cooling medium circulation system and each cooling medium circulation cavity 32, thereby cooling the support member 31 and the end stop member 33 to prevent the support member 31 and the end stop member 33 from being deformed due to prolonged baking.

[0027] Taking into consideration the cost, transportation difficulty, storage difficulty and cost-effectiveness, the cooling medium is preferably water. The cooling medium circulation system includes a water pump, a water pool and necessary pipes. The water pump is connected to the water pool and the cooling medium circulation chamber 32 through the pipes. Driven by the water pump, the water in the water pool enters the cooling medium circulation chamber 32, circulates in the cooling medium circulation chamber 32, and then flows into the water pool for cooling. The temperature of the support member 31 and the end stopper 33 is taken away by the continuously flowing water, so as to avoid deformation of the end stopper 33 and the support member 31 due to being exposed to high temperature for a long time.

[0028] In the scrap steel preheating device of the present embodiment, the heating furnace hood 3 cooperates with the conveying mechanism 1 to form a preheating conveying channel. The scrap steel transported by the conveying mechanism 1 to the smelting furnace and the high-temperature flue gas generated by smelting in the smelting furnace all pass through the preheating conveying channel. The heat carried by the high-temperature flue gas and the heat generated by the combustion of the high-temperature flue gas preheat the scrap steel in the preheating conveying channel. Moreover, the first clearance gap and the second clearance gap formed between the heating furnace hood 3 and the conveying mechanism 1 can not only adapt to the vibration of the conveying mechanism 1, but also reduce the emission of high-temperature flue gas in the preheating conveying channel.

[0029] See also Figure 1 and Figure 2 In order to further prevent the high-temperature flue gas in the preheating and conveying channel from being lost, in some embodiments, a smoke blocking member is arranged in the first clearance gap, and the smoke blocking member includes an upper baffle 34 and a lower baffle 11. The upper baffle 34 is arranged on the bottom surface of the support member 31, and the lower baffle 11 is arranged on the conveying mechanism 1. The lower edge of the upper baffle 34 is lower than the upper edge of the lower baffle 11, and the upper baffle 34 and the lower baffle 11 are staggered in sequence along the direction from the inside of the heating furnace hood 3 to the outside of the heating furnace hood 3.

[0030] Specifically, the smoke blocking member includes an upper baffle 34 and a lower baffle 11. The upper baffle 34 is arranged on the bottom surface of the support member 31, and the lower baffle 11 is arranged on the conveying mechanism 1. The upper baffle 34 and the lower baffle 11 are staggered in the direction from the inside of the heating furnace hood 3 to the outside of the heating furnace hood 3, and the lower edge of the upper baffle 34 is lower than the upper edge of the lower baffle 11. Under the action of the upper baffle 34 and the lower baffle 11, the high-temperature smoke that dissipates outward becomes wavy when passing through the smoke blocking member, and the difficulty of the high-temperature smoke passing through the smoke blocking member in the first clearance gap is increased, thereby reducing the amount of high-temperature smoke dissipated.

[0031] Preferably, the upper baffle 34 and the lower baffle 11 are perpendicular to the bottom surface of the support member 31, and are arranged along the conveying direction of the conveying mechanism 1, so as to block the high-temperature flue gas at various locations in the preheating conveying channel.

[0032] As a further embodiment, there are at least two upper baffles 34 and lower baffles 11. They are staggered in the direction from the inside of the heating furnace cover 3 to the outside of the heating furnace cover 3, and the upper baffles 34 and the lower baffles 11 are staggered in sequence, so that the high-temperature flue gas that is dispersed outside forms a continuous wave shape when passing through the flue gas blocking member.

[0033] To further prevent the loss of high temperature flue gas in the preheating conveying channel, please refer to Figure 1 and Figure 2In some embodiments, water seal grooves 21 are provided on both support platforms 2, and the water seal grooves 21 are connected to the cooling medium circulation system. Water seal knives 12 are provided on both sides of the conveying mechanism 1, and the two water seal knives 12 respectively extend into the two water seal grooves 21 and cooperate with the cooling medium in the two water seal grooves 21.

[0034] Specifically, water seal grooves 21 are provided on the facing sides of the two supporting platforms 2, and the water seal grooves 21 are provided along the conveying direction of the conveying mechanism 1. The cooling medium circulation system is connected with the water seal grooves 21 and drives the water or other cooling medium in the water seal grooves 21 to circulate. Water seal knives 12 are provided on both sides of the conveying mechanism 1, and the two water seal knives 12 are respectively extended into the two water seal grooves 21. In the process of conveying scrap steel by the conveying mechanism 1, the lower edge of the water seal knife 12 is always immersed in the water or other cooling medium in the water seal groove 21, and the water seal knife 12 always cooperates with the cooling medium in the water seal groove 21, thereby isolating the first clearance gap and the second clearance gap from the outside world. The first clearance gap and the second clearance gap are called the intermediate buffer area between the preheating conveying channel and the outside world, which effectively avoids the loss of temperature in the preheating conveying channel.

[0035] In some embodiments, the heating furnace hood 3 is a U-shaped hood body, and the burner is arranged on the top plate of the heating furnace hood 3; the heating furnace hood 3 is arranged as a U-shaped hood body structure, which has low processing difficulty and low processing cost. The burner is arranged on the top plate of the heating furnace hood 3 and sprays fire into the interior of the heating furnace hood 3 to achieve combustion preheating of the preheating and transporting channel.

[0036] In some embodiments, the conveying mechanism 1 is a vibrating feeder, and the vibration amplitude of the conveying mechanism 1 is smaller than the second clearance gap. The vibration amplitude of the conveying mechanism 1 is smaller than the second clearance gap to avoid collision between the vibrating feeder and the heating furnace cover 3.

[0037] Based on the same inventive concept, the second embodiment of the present utility model provides a heating furnace cover 3, see Figure 1-Figure 3 A burner mounting position 35 is provided on the top plate of the heating furnace hood 3, and support members 31 are provided at both ends of the bottom of the heating furnace hood 3. One end of the support member 31 extends out of the heating furnace hood 3 and is provided with a support connection portion, and an end stopper 33 is provided at the other end of the support member 31. The bottom end of the end stopper 33 is lower than the bottom surface of the support member 31, and cooling medium circulation cavities 32 are provided inside the end stopper 33 and the support member 31. The cooling medium circulation cavities 32 are connected, and a cooling medium circulation system connection port is also provided on the support member 31.

[0038] Specifically, Figure 3The direction of the heating furnace hood 3 shown in the drawing is in the buckled state as a reference, a burner mounting position 35 is arranged on the top plate of the heating furnace hood 3 for installing the burner, support members 31 are arranged at both ends of the bottom of the heating furnace hood 3, the support member 31 is used to install the heating furnace hood 3 above the conveying mechanism 1, one end of the support member 31 extends to the outside of the heating furnace hood 3 and is provided with a support connection portion, the support connection portion is used to connect with the support platform 2 or other mounting structures, an end stopper 33 is arranged at the other end of the support member 31, the bottom end of the end stopper 33 is lower than the bottom surface of the support member 31, the end stopper 33 and the support member 31 are both provided with cooling medium circulation chambers 32, each cooling medium circulation chamber 32 is connected, and a cooling medium circulation system connection port for connecting each cooling medium circulation chamber 32 to the cooling medium circulation system is provided on the support member 31.

[0039] As a further embodiment, at least one upper baffle plate 34 is provided on the bottom surface of the support member 31 from the end baffle 33 toward the support portion, and the upper baffle plate 34 is perpendicular to the bottom surface of the support member 31 .

[0040] As a preferred embodiment, the heating furnace cover 3 is a U-shaped cover which is easy to process and has a stable structure.

[0041] In the description of this specification, the description of reference terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0042] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A scrap steel preheating and charging device, characterized in that: The invention comprises a conveying mechanism (1), a heating furnace cover (3) and a cooling medium circulation system, wherein support platforms (2) are arranged on both sides of the conveying mechanism (1), support members (31) are arranged at both ends of the bottom of the heating furnace cover (3), a cooling medium circulation cavity (32) is arranged in the support member (31), the two support members (31) are respectively connected to the two support platforms (2), and the inner end surface of the heating furnace cover (3) and the conveying surface of the conveying mechanism (1) form a preheating conveying channel, and the heating furnace cover (3) is also provided with a burner for spraying fire into the preheating conveying channel for heating. A first clearance gap is reserved between the conveying mechanism (1) and the two support members (31); an end stopper (33) is provided at the end of each support member (31) located in the preheating conveying channel; a cooling medium circulation cavity is also provided in the end stopper (33); and a second clearance gap is reserved between the end stopper (33) and the conveying mechanism (1); the second clearance gap is smaller than the first clearance gap; the cooling medium circulation system is connected to each cooling medium circulation cavity and drives the cooling medium to circulate between the cooling medium circulation system and each cooling medium circulation cavity.

2. The scrap steel preheating and charging device according to claim 1, characterized in that: A smoke blocking member is arranged in the first clearance gap, the smoke blocking member comprising an upper baffle (34) and a lower baffle (11), the upper baffle (34) being arranged on the bottom surface of the support member (31), the lower baffle (11) being arranged on the conveying mechanism (1), the lower edge of the upper baffle (34) being lower than the upper edge of the lower baffle (11), and the upper baffle (34) and the lower baffle (11) being arranged alternately in sequence along a direction from the inside of the heating furnace cover (3) to the outside of the heating furnace cover (3).

3. The scrap steel preheating and charging device according to claim 2, characterized in that: There are at least two upper baffles (34) and at least two lower baffles (11).

4. A scrap steel preheating and charging device according to claim 2, characterized in that: Water seal grooves (21) are provided on both support platforms (2), and the water seal grooves (21) are connected to the cooling medium circulation system. Water seal knives (12) are provided on both sides of the conveying mechanism (1), and the two water seal knives (12) extend into the two water seal grooves (21) respectively and cooperate with the cooling medium in the two water seal grooves (21).

5. The scrap steel preheating and charging device according to claim 4, characterized in that: The heating furnace cover (3) is a U-shaped cover body, and the burner is arranged on the top plate of the heating furnace cover (3).

6. A scrap steel preheating and charging device according to claim 5, characterized in that: The conveying mechanism (1) is a vibrating feeder, and the vibration amplitude of the conveying mechanism (1) is smaller than the second clearance gap.

7. A heating furnace cover, characterized in that: A burner mounting position (35) is provided on the top plate of the heating furnace cover (3), and support members (31) are provided at both ends of the bottom of the heating furnace cover (3). One end of the support member (31) extends out of the heating furnace cover (3) and is provided with a support connection portion, and the other end of the support member (31) is provided with an end stopper (33), and the bottom end of the end stopper (33) is lower than the bottom surface of the support member (31). Cooling medium circulation cavities are provided inside the end stopper (33) and the support member (31), and the cooling medium circulation cavities are connected. A cooling medium circulation system connection port is also provided on the support member (31).

8. A heating furnace cover according to claim 7, characterized in that: At least one upper baffle plate (34) is provided on the bottom surface of the support member (31) from the end baffle plate (33) towards the support portion, and the upper baffle plate (34) is perpendicular to the bottom surface of the support member (31).

9. A heating furnace cover according to claim 7, characterized in that: The heating furnace cover (3) is a U-shaped cover.

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