Heat exchange structure of hearth of hot blast stove

Abstract

The utility model discloses a hot-blast stove hearth heat exchange structure, which relates to the technical field of hot-blast stove hearth structures and comprises a hearth fixing frame, a hot-blast stove air outlet is formed in the top end of the hearth fixing frame, a conical hearth is fixedly connected in the hearth fixing frame, and a plurality of hearth inner heat exchange tubes are fixedly connected in the conical hearth. The hot-blast stove air outlet is located at the top of the conical hearth. Through the cone structure at the lower part of the hearth, sufficient heat exchange between heat exchange air and the surface of the hearth in the circumferential range in the heat exchange process is ensured, so that the problem that only the local area of the left surface of a bottom barrel structure of a traditional hot air part plays a heat exchange role is solved, and the heat efficiency of the hot blast stove is effectively improved; air of the heat exchange tube structure in the hearth is directly heated into high-temperature air in the tube, the heat exchange rate reaches 95%, the temperature can be adjusted according to the combustion temperature of the hearth, and fuel is saved by more than 20% under the condition of the same air outlet temperature.

Description

Technical Field

[0001] The utility model relates to the technical field of hot blast stove furnace structures, in particular to a hot blast stove furnace heat exchange structure. Background Art

[0002] At present, the furnace structure of the "hot blast furnace" on the market is generally a flat bottom structure welded together with the bottom plate. The cold air passes through the heat exchange tube at the rear, and then exchanges heat locally on the left outer surface of the furnace and is discharged from the hot air outlet for drying. After the heat generated by the combustion of fuel in the furnace heats the furnace, only the left part of the furnace exchanges heat with the cold air, and the heat from other parts of the furnace gathers in the front, causing the following hazards: 1. It causes local overheating of the furnace, which reduces the strength of the steel structure of the furnace for a long time and affects the safety of the furnace operation; 2. Nearly a quarter of the heat generated by the fuel is wasted in the rear furnace, reducing the thermal efficiency of the hot blast furnace; 3. The hot air temperature at the air outlet cannot be used as a high-temperature furnace due to structural limitations, and it is also not convenient to adjust it according to the use requirements. For this reason, the utility model proposes a heat exchange structure for the furnace of a hot blast furnace. Utility Model Content

[0003] Technical problems solved

[0004] The purpose of the utility model is to make up for the deficiencies of the prior art and to provide a heat exchange structure for a hot blast furnace.

[0005] Technical Solution

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a hot blast furnace furnace heat exchange structure, comprising a furnace fixing frame, a hot blast furnace air outlet is opened at the top of the furnace fixing frame, the interior of the furnace fixing frame is fixedly connected to a conical furnace, and the interior of the conical furnace is fixedly connected to a plurality of furnace heat exchange pipes, and the hot blast furnace air outlet is located at the top of the conical furnace.

[0007] As mentioned above, the bottom end of the furnace fixing frame is fixedly connected with two pairs of supporting legs, and one end of the furnace fixing frame is embedded and connected with a pair of air-permeable partition frames.

[0008] As mentioned above, the top of the hot blast furnace outlet is connected to a movable hose by bolts, and the top of the movable hose is fixedly connected to a connecting pipe, and an adjustment mechanism is provided between the top of the furnace fixed frame and the outer wall of the connecting pipe.

[0009] The above-mentioned adjustment mechanism includes a pair of fixed plates, and the pair of fixed plates are both located at the top of the furnace fixed frame. The outer wall of the connecting tube is provided with a circular frame, and both ends of the circular frame are fixedly connected to a rotating rod, and the ends of a pair of rotating rods that are away from each other are respectively rotatably connected to the ends of a pair of fixed plates close to each other through bearings. One end of the fixed plate located on one side is fixedly connected to a motor, and the output end of the motor is fixedly connected to one end of the rotating rod located on one side. The outer wall of the connecting tube is fixedly connected to a pair of connecting plates, and an electric telescopic rod is fixedly connected between the bottom ends of the pair of connecting plates and the top of the circular frame, and a rotation auxiliary mechanism is provided between the outer wall of the rotating rod and one end of the fixed plate.

[0010] As mentioned above, the bottom ends of the pair of fixed plates are fixedly connected to the straight plates, and the pair of straight plates are connected to the top end of the furnace fixed frame through bolts.

[0011] As mentioned above, a pair of the rotation auxiliary mechanisms each include a rotating plate sleeved on the outer wall of the rotating rod, a pair of sliding rods are fixedly connected to one end of the rotating plate close to the fixed plate, an annular groove is carved on one end of the fixed plate close to the rotating plate, and the pair of sliding rods are both located in the annular groove and slidably connected thereto.

[0012] As mentioned above, a sealing plug is sleeved on the top of the connecting pipe, and the outer wall of the sealing plug is in close contact with the inner wall of the connecting pipe.

[0013] Compared with the prior art, the technical solution provided by this utility model has the following beneficial effects:

[0014] 1. The utility model ensures that the heat exchange air fully exchanges heat with the furnace surface within the circumference during the heat exchange process by setting the cone structure at the bottom of the furnace, thereby avoiding the problem that only the left local area of the traditional hot air part bottom barrel structure has a heat exchange effect, effectively improving the thermal efficiency of the hot blast furnace. The air in the heat exchange pipe structure in the furnace is directly heated to high-temperature air in the pipe, and the heat exchange rate reaches 95%. The temperature can be adjusted according to the combustion temperature of the furnace, and more than 20% of fuel energy is saved under the same air outlet temperature.

[0015] 2. The utility model is capable of driving the connecting pipe to perform telescopic and rotational movements through the setting of the adjustment mechanism and the rotation auxiliary mechanism, so as to drive the connecting pipe to perform telescopic adjustment and angle adjustment, and realize driving the air outlet of the hot air furnace to perform appropriate position and angle adjustment under the guidance of the connecting pipe, so as to facilitate docking and air drying treatment.

[0016] Other advantages, objectives and features of the present invention will be described in part in the following description and will be apparent to those skilled in the art based on an examination of the following or may be learned from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the partial cross-section structure of the furnace fixing frame in the present invention;

[0019] Figure 3 It is a partial cross-sectional structural diagram of the adjustment mechanism and the rotation auxiliary mechanism in the present utility model;

[0020] Figure 4 It is a partial cross-sectional structural diagram of the rotation assist mechanism in the present utility model.

[0021] In the figure: 1. Furnace fixing frame; 2. Hot blast furnace air outlet; 3. Conical furnace; 4. Heat exchange tube in the furnace; 5. Support legs; 6. Breathable partition frame; 7. Movable hose; 8. Connecting pipe; 9. Adjusting mechanism; 901. Fixed plate; 902. Reciprocating frame; 903. Motor; 904. Electric telescopic rod; 905. Connecting plate; 906. Rotating rod; 10. Rotation auxiliary mechanism; 1001. Rotating plate; 1002. Sliding rod; 1003. Annular slide; 11. Sealing plug. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] Example 1:

[0024] like Figure 1-2 As shown, the utility model provides a technical solution: a hot blast furnace furnace heat exchange structure, including a furnace fixed frame 1, a hot blast furnace outlet 2 is opened at the top of the furnace fixed frame 1, the interior of the furnace fixed frame 1 is fixedly connected to a conical furnace 3, and the interior of the conical furnace 3 is fixedly connected to a plurality of furnace heat exchange pipes 4, the hot blast furnace outlet 2 is located at the top of the conical furnace 3, the bottom end of the furnace fixed frame 1 is fixedly connected to two pairs of supporting legs 5, and one end of the furnace fixed frame 1 is embedded with a pair of air permeable partition frames 6.

[0025] During the use of this solution, the cold air can be heat exchanged in the left heat exchange tube and then enter the bottom of the furnace cone. Part of the air rises around the outer surface of the furnace to the hot air furnace outlet 2. In this process, the air and the furnace surface are fully heat exchanged and heated by the air. Part of the air passes through the heating tube in the furnace. The air is directly heated into high-temperature air in the tube and mixed with the air on the outer surface of the furnace to form the set drying gas.

[0026] Example 2:

[0027] like Figure 1 and Figure 3-4 As shown, the top of the hot blast furnace outlet 2 is connected to a movable hose 7 by bolts, and the top of the movable hose 7 is fixedly connected to a connecting pipe 8. An adjusting mechanism 9 is provided between the top of the furnace fixed frame 1 and the outer wall of the connecting pipe 8. A sealing plug 11 is provided on the top of the connecting pipe 8, and the outer wall of the sealing plug 11 is in close contact with the inner wall of the connecting pipe 8.

[0028] During use of this solution, the movable hose 7 and the connecting pipe 8 are connected to the hot blast stove outlet 2 by bolts, and can be extended and docked when the position of the hot blast stove outlet 2 is limited, so as to facilitate connection with an external pipeline, thereby guiding and discharging the air outlet of the hot blast stove outlet 2, facilitating the hot blast stove outlet 2 to discharge and dry the air at a longer distance, and the sealing plug 11 is sealed when the connecting pipe 8 is idle to reduce the entry of dust.

[0029] like Figure 1 and Figure 3-4 As shown, the adjusting mechanism 9 includes a pair of fixed plates 901, and the pair of fixed plates 901 are both located at the top of the furnace fixed frame 1. The outer wall of the connecting tube 8 is provided with a circular frame 902, and both ends of the circular frame 902 are fixedly connected to a rotating rod 906, and the ends of the pair of rotating rods 906 are respectively rotatably connected to the ends of the pair of fixed plates 901 that are close to each other through bearings. One end of the fixed plate 901 on one side is fixedly connected to a motor 903, and the output end of the motor 903 is fixedly connected to one end of the rotating rod 906 on one side. The outer wall of the connecting tube 8 is fixedly connected to a pair of connecting plates 905, and an electric telescopic rod 904 is fixedly connected between the bottom end of the pair of connecting plates 905 and the top end of the circular frame 902. A rotation auxiliary mechanism 10 is provided between the outer wall of the rotating rod 906 and one end of the fixed plate 901. The bottom ends of the pair of fixed plates 901 are fixedly connected to straight plates, and the pair of straight plates are connected to the top of the furnace fixed frame 1 by bolts.

[0030] During use of this solution, the electric telescopic rod 904 drives the connecting pipe 8 to move upward through the connecting plate 905, so that the connecting pipe 8 is extended in position with the assistance of the movable hose 7, so as to facilitate the connection of the connecting pipe 8 with a pipe that is farther away, or to dry products that are farther away at close range, and the motor 903 drives the circular frame 902 to rotate through the rotating rod 906, and the circular frame 902 drives the connecting pipe 8 to rotate through the electric telescopic rod 904 and the connecting plate 905, so that the connecting pipe 8 is assisted by the movable hose 7 to adjust the angle, which not only facilitates the connection of the connecting pipe 8 with external pipes at different angles, but also drives the air outlet 2 of the hot air furnace to spray out air at multiple angles during drying, thereby enhancing the drying effect.

[0031] like Figure 1 and Figure 4 As shown, a pair of rotation auxiliary mechanisms 10 each include a rotating plate 1001 sleeved on the outer wall of the rotating rod 906, and a pair of sliding rods 1002 are fixedly connected to one end of the rotating plate 1001 close to the fixed plate 901, and an annular groove 1003 is carved on one end of the fixed plate 901 close to the rotating plate 1001, and the pair of sliding rods 1002 are both located in the annular groove 1003 and are slidably connected thereto.

[0032] During use of this solution, when the rotating rod 906 rotates, it drives the rotating plate 1001 to rotate synchronously, so that it drives a pair of sliding rods 1002 to move in a circle along the annular groove 1003, thereby assisting the rotation of the circular frame 902 and the connecting tube 8, so that they maintain stable movement.

[0033] Working principle: First, the rotating bolt drives the connecting pipe 8 and the movable hose 7 to connect with the hot blast furnace outlet 2, and at the same time drives a pair of fixed plates 901 to connect with the top of the furnace fixed frame 1, then the electric telescopic rod 904 drives the connecting pipe 8 to move upward through the connecting plate 905, so that the connecting pipe 8 is extended with the assistance of the movable hose 7, and the motor 903 drives the circular frame 902 to rotate through the rotating rod 906, and the circular frame 902 drives the connecting pipe 8 to rotate through the electric telescopic rod 904 and the connecting plate 905, so that the connecting pipe 8 is extended with the assistance of the movable hose 7. The connecting pipe 8 is assisted by the movable hose 7 to adjust the angle, driving the connecting pipe 8 to connect with the farther pipe, or approach the farther product, and then the hot blast furnace works. The cold air can be heat exchanged with the left heat exchange tube and then enter the bottom of the furnace cone. Part of the air rises around the outer surface of the furnace to the hot blast furnace outlet 2. In this process, the air fully exchanges heat with the furnace surface and heats the air. Part of the air passes through the heating tube in the furnace, and the air is directly heated into high-temperature air in the tube, and mixed with the air on the outer surface of the furnace to form the set drying gas.

[0034] The wiring diagram of the motor 903 and the electric telescopic rod 904 in this solution is common knowledge in the field, and its working principle is a well-known technology. The model is selected according to the actual use, so the control method and wiring layout of the motor 903 and the electric telescopic rod 904 will not be explained in detail.

[0035] It should be noted that, in this document, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate positions or location relationships based on the positions or location 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 devices or components referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention; the terms "first", "second", and "third" are only used for descriptive purposes and should not be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "fixed", "installed", "connected", and "connected" should be understood in a broad sense. For example, "installed" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a mechanical connection or an electrical connection; "connected" can be a direct connection, an indirect connection through an intermediate medium, or the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hot blast furnace heat exchange structure, comprising a furnace fixing frame (1), characterized in that: A hot blast furnace outlet (2) is formed at the top of the furnace fixed frame (1), a conical furnace (3) is fixedly connected to the interior of the furnace fixed frame (1), and a plurality of furnace heat exchange pipes (4) are fixedly connected to the interior of the conical furnace (3), and the hot blast furnace outlet (2) is located at the top of the conical furnace (3).

2. The hot blast furnace heat exchange structure according to claim 1, characterized in that: Two pairs of supporting legs (5) are fixedly connected to the bottom end of the furnace fixed frame (1), and a pair of air-permeable partition frames (6) are embedded and connected to one end of the furnace fixed frame (1).

3. The hot blast stove furnace heat exchange structure according to claim 1, characterized in that: The top end of the hot blast furnace air outlet (2) is connected to a movable hose (7) via bolts, and the top end of the movable hose (7) is fixedly connected to a connecting pipe (8), and an adjustment mechanism (9) is provided between the top end of the furnace fixed frame (1) and the outer wall of the connecting pipe (8).

4. The hot blast furnace heat exchange structure according to claim 3, characterized in that: The adjustment mechanism (9) comprises a pair of fixed plates (901), both of which are located at the top of the furnace fixed frame (1); the outer wall of the connecting tube (8) is provided with a circular frame (902), and both ends of the circular frame (902) are fixedly connected to a rotating rod (906); the ends of the pair of rotating rods (906) that are separated from each other are respectively rotatably connected to the ends of the pair of fixed plates (901) that are close to each other through bearings; one end of the fixed plate (901) located on one side is fixedly connected to a motor (903), and the output end of the motor (903) is fixedly connected to one end of the rotating rod (906) located on one side; the outer wall of the connecting tube (8) is fixedly connected to a pair of connecting plates (905), and an electric telescopic rod (904) is fixedly connected between the bottom ends of the pair of connecting plates (905) and the top end of the circular frame (902); and a rotation auxiliary mechanism (10) is provided between the outer wall of the rotating rod (906) and one end of the fixed plate (901).

5. The hot blast stove furnace heat exchange structure according to claim 4, characterized in that: The bottom ends of the pair of fixed plates (901) are fixedly connected to straight plates, and the pair of straight plates are connected to the top end of the furnace fixed frame (1) through bolts.

6. The hot blast stove furnace heat exchange structure according to claim 4, characterized in that: A pair of the rotation auxiliary mechanisms (10) each include a rotating plate (1001) sleeved on the outer wall of the rotating rod (906), one end of the rotating plate (1001) close to the fixed plate (901) is fixedly connected to a pair of sliding rods (1002), and an annular groove (1003) is cut at one end of the fixed plate (901) close to the rotating plate (1001), and the pair of sliding rods (1002) are both located in the annular groove (1003) and are slidably connected thereto.

7. The hot blast stove furnace heat exchange structure according to claim 3, characterized in that: A sealing plug (11) is sleeved on the top of the connecting pipe (8), and the outer wall of the sealing plug (11) is in close contact with the inner wall of the connecting pipe (8).

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