Cooling chamber and cold part flue gas preheating chamber

Abstract

This utility model relates to the field of cooling furnace technology and discloses a cooling chamber that also serves as a preheating chamber for cold parts. It includes a cooling preheating furnace with several support pipes fixedly connected to both sides. Each support pipe has a cooling mechanism connected inside. Support assemblies are also connected to both sides of the cooling preheating furnace, and sealing mechanisms for sealing the support pipes are connected inside both support assemblies. An exhaust mechanism and a hot gas circulation mechanism are connected to the upper surface of the cooling preheating furnace, and several rollers are rotatably connected to the bottom surface of the inner wall of the cooling preheating furnace. This cooling chamber / preheating chamber, by merging the cooling chamber and preheating chamber into an integrated device (cooling preheating furnace), eliminates the independent structures and connecting pipes between the cooling chamber and preheating chamber in traditional separate designs, significantly saving equipment space and simplifying the production process layout.

Description

Technical Field

[0001] This utility model relates to the field of cooling furnace technology, specifically a cooling chamber that also serves as a preheating chamber for flue gas from cold parts. Background Technology

[0002] In the steel production process, in order to avoid the steel having low strength at high temperatures (such as 800-1000℃), uneven cooling may cause deformation (such as bending, twisting) or cracking due to thermal stress concentration. Therefore, it is often necessary to transport the heated steel to a cooling chamber for cooling.

[0003] After cooling, the steel temperature typically drops to a low level. Directly heating the steel to the next process (such as furnace heating, rolling, or further heat treatment) requires absorbing a large amount of heat, resulting in extremely high energy consumption. Furthermore, cooled steel may exhibit localized temperature unevenness (such as a temperature difference between the surface and the core). Direct heating in this case can lead to uneven heating ("cooked outside, raw inside") or severe temperature gradients, causing thermal stress and even cracking. Preheating, by slowly increasing the temperature, can make the overall temperature of the steel more uniform, reducing the risk of thermal shock.

[0004] In existing production systems, cooling chambers and preheating chambers are usually set up separately. The high-temperature flue gas generated in the cooling chamber needs to be transported to the preheating chamber through pipelines for utilization. During this transportation process, there is not only a certain transmission time delay, but also a drop in flue gas temperature due to energy loss, which affects the preheating efficiency and temperature stability, thereby reducing the utilization rate of waste heat recovery. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a cooling chamber that also serves as a preheating chamber for cold parts' flue gas, combining the cooling chamber and the preheating chamber. This not only saves space but also avoids losses during heat recovery.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a cooling chamber that also serves as a preheating chamber for flue gas of cold parts, comprising a cooling preheating furnace, wherein several support pipes are fixedly connected to both sides of the cooling preheating furnace, and a cooling mechanism is connected inside each of the support pipes; support components are also connected to both sides of the cooling preheating furnace, and a sealing mechanism for sealing the support pipes is connected inside each of the two support components; an exhaust mechanism is connected to the upper surface of the cooling preheating furnace, and a hot gas circulation mechanism is connected to the other end of the exhaust mechanism; several rollers are rotatably connected to the bottom surface of the inner wall of the cooling preheating furnace.

[0007] Furthermore, the cooling mechanism includes a cross bracket and a hair dryer. The four ends of the cross bracket are fixedly connected to the inner wall of the support tube, and the middle part of the cross bracket is fixedly connected to the motor of the hair dryer. The fan blades of the hair dryer face the cooling preheating furnace, and the hair dryer is located on the side of the sealing mechanism away from the cooling preheating furnace.

[0008] Furthermore, the support assembly includes several support blocks, one end of which is fixedly connected to the side wall of the cooling preheating furnace, and the other end of which is connected to the sealing mechanism.

[0009] Furthermore, the upper surface of several support tubes is provided with a socket, and the sealing mechanism is located inside the socket.

[0010] Furthermore, the sealing mechanism includes a sealing plate, a hydraulic rod, and several telescopic rods. The outer walls of the hydraulic rod and the several telescopic rods are respectively fixedly connected to several support blocks on the same side of the cooling preheating furnace. The output end of the hydraulic rod and the inner rods of the several telescopic rods pass through the support blocks and are fixedly connected to the sealing plate. The sealing plate is slidably connected to several sockets.

[0011] Furthermore, the exhaust mechanism includes a multi-head exhaust pipe and several electric exhaust fans. One end of each multi-head exhaust pipe is fixedly connected to the upper surface of the cooling preheating furnace, and the other end of each multi-head exhaust pipe is connected to the hot air circulation mechanism. The fan blades of the several electric exhaust fans are located inside the multi-head exhaust pipe near the cooling preheating furnace.

[0012] Furthermore, the hot air circulation mechanism includes a three-way pipe, an air outlet pipe, and a return air pipe. One end of the air outlet pipe is fixedly connected to the end of the multi-head exhaust pipe away from the cooling preheating furnace, and the other end of the air outlet pipe is fixedly connected to one end of the three-way pipe. The other two ends of the three-way pipe are fixedly connected to the return air pipe and an external pipe, respectively. The other end of the return air pipe is fixedly connected to the cooling preheating furnace. A temperature monitoring sensor and a solenoid valve are installed inside the three-way pipe. Both the multi-head exhaust pipe and the air outlet pipe have heat storage chambers inside.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. This cooling chamber also serves as a preheating chamber for cold parts flue gas. By combining the cooling chamber and the preheating chamber into an integrated device (cooling and preheating furnace), the independent structure and connecting pipes between the cooling chamber and the preheating chamber in the traditional split design are eliminated, which significantly saves equipment space and simplifies the production process layout.

[0015] 2. The cooling chamber also serves as a preheating chamber for flue gas from cold parts. The high-temperature flue gas generated during the cooling process is directly recycled inside the cooling preheating furnace through a hot gas circulation mechanism, avoiding heat loss and time delay during flue gas transmission through pipelines in traditional systems. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall appearance of the present utility model;

[0017] Figure 2 This is a detailed connection diagram of the components of the present invention, including the cooling preheating furnace, support pipe, and multi-head exhaust pipe.

[0018] Figure 3This utility model Figure 2 Enlarged view of point A in the middle;

[0019] Figure 4 This is a schematic diagram of the overall appearance of the sealing mechanism of this utility model;

[0020] Figure 5 This is a schematic diagram of the overall appearance of the cooling mechanism of this utility model.

[0021] In the diagram: 1. Cooling and preheating furnace; 2. Support pipe; 3. Cross bracket; 4. Support block; 5. Telescopic rod; 6. Sealing plate; 7. Hydraulic rod; 8. T-pipe; 9. Air outlet pipe; 10. Air return pipe; 11. Electric exhaust fan; 12. Multi-head exhaust pipe; 13. Electric blower; 14. Roller; 15. Inlet; 16. Heat storage chamber. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Please see Figures 1-5 The cooling chamber also serves as a preheating chamber for cold parts, including a cooling preheating furnace 1. Several support pipes 2 are fixedly connected to both sides of the cooling preheating furnace 1. Cooling mechanisms are connected inside the support pipes 2. Support components are also connected to both sides of the cooling preheating furnace 1. Sealing mechanisms for sealing the support pipes 2 are connected inside the two support components. An exhaust mechanism is connected to the upper surface of the cooling preheating furnace 1. A hot air circulation mechanism is connected to the other end of the exhaust mechanism. Several rollers 14 are rotatably connected to the bottom surface of the inner wall of the cooling preheating furnace 1.

[0024] like Figures 1 to 5 As shown, in the present invention, the cooling chamber and cold part flue gas preheating chamber are used when the workpiece burning in the previous combustion chamber is moved into the cooling preheating furnace 1 by a trolley or other tools (at this time, the temperature of the workpiece is usually 880-920℃). Then, the cooling mechanisms on both sides of the cooling preheating furnace 1 are started at the same time. After the cooling mechanism is started, it blows on the workpiece on the middle roller 14 of the cooling preheating furnace 1 to reduce the temperature of the workpiece. During this period, the heat carried by the workpiece and the heat blown away by the cooling mechanism are transported to the hot air circulation mechanism through the exhaust mechanism. As these circulating hot air are initially absorbed and stored by the hot air circulation mechanism, the remaining heat is then transported from the hot air circulation mechanism to other external processes (such as heat recovery heat exchangers) along with the gas, while the workpiece is rapidly cooled.

[0025] Once the workpiece temperature drops to a certain range (usually ≤600℃), since workpiece preheating is typically around 200℃, the cooling mechanism is shut off at this point. The air outlet of the cooling mechanism is then sealed by the sealing mechanism. The airflow direction of the hot air circulation mechanism is then changed. Since there are other workpieces burning and heating in the previous combustion chamber, and combustion and heating take a certain amount of time, the exhaust mechanism can be kept open to circulate the remaining temperature on the workpiece, along with the temperature in the combustion chamber and the heat previously collected by the hot air circulation mechanism. This allows the temperature inside the cooling preheating furnace 1 to be maintained at a relatively constant temperature, or even higher than the temperature of the workpiece surface, until the next workpiece moves into the cooling preheating furnace 1. This workpiece is then pushed into the next combustion chamber, thus eliminating the need for subsequent preheating steps.

[0026] It should be noted that the feed end and discharge end of the cooling preheating furnace 1 are connected to the previous combustion chamber and the next combustion chamber respectively, with a sealed hollow pipe in between. In fact, the openings at both ends of the cooling preheating furnace 1 are not directly exposed to the air.

[0027] As a preferred embodiment of this utility model, the cooling mechanism includes a cross bracket 3 and a hair dryer 13. The four ends of the cross bracket 3 are fixedly connected to the inner wall of the support tube 2. The middle part of the cross bracket 3 is fixedly connected to the motor of the hair dryer 13. The fan blades of the hair dryer 13 face the cooling preheating furnace 1, and the hair dryer 13 is located on the side of the sealing mechanism away from the cooling preheating furnace 1.

[0028] More specifically, when it is necessary to rapidly cool the workpiece inside the cooling preheating furnace 1, simply turn on the electric blower 13. The electric blower 13 generates strong air and blows it onto the surface of the workpiece, thereby rapidly cooling the workpiece.

[0029] As a preferred embodiment of the present invention, the support assembly includes a plurality of support blocks 4, one end of each of the support blocks 4 being fixedly connected to the side wall of the cooling preheating furnace 1, and the other end of each of the support blocks 4 being connected to the sealing mechanism.

[0030] More specifically, by setting support block 4, the sealing mechanism can be stably supported, preventing the sealing mechanism from falling or shaking.

[0031] As a preferred embodiment of this utility model, a plurality of support tubes 2 are provided with an insertion port 15 on their upper surfaces, and the sealing mechanism is located inside the insertion port 15.

[0032] More specifically, by setting the socket 15, the socket 15 can be opened by the sealing mechanism when the cooling mechanism is started, so that the air force of the blower 13 can blow into the cooling preheating furnace 1 to quickly cool the workpiece; and when the cooling mechanism is not needed, the sealing mechanism can be completely passed through the socket 15 to block the support tube 2 and achieve a seal.

[0033] As a preferred embodiment of this utility model, the sealing mechanism includes a sealing plate 6, a hydraulic rod 7 and several telescopic rods 5. The outer walls of the hydraulic rod 7 and several telescopic rods 5 are respectively fixedly connected to several support blocks 4 on the same side of the cooling preheating furnace 1. The output end of the hydraulic rod 7 and the inner rods of several telescopic rods 5 pass through the support blocks 4 and are fixedly connected to the sealing plate 6. The sealing plate 6 is slidably connected to several inlets 15.

[0034] More specifically, when it is necessary to seal the support tube 2, simply open the hydraulic rod 7. The output axis of the hydraulic rod 7 extends outward, which can extend the telescopic rod 5 together, thereby inserting the sealing plate 6 into several support tubes 2.

[0035] It should be noted that the telescopic rod 5 consists of a fixed outer rod and an inner rod that can slide and extend inside the outer rod. As this is existing technology, it will not be described in detail here.

[0036] As a preferred embodiment of this utility model, the exhaust mechanism includes a multi-head exhaust pipe 12 and a plurality of electric exhaust fans 11. One end of each multi-head exhaust pipe 12 is fixedly connected to the upper surface of the cooling preheating furnace 1, and the other end of each multi-head exhaust pipe 12 is connected to the hot air circulation mechanism. The fan blades of the plurality of electric exhaust fans 11 are respectively located inside the multi-head exhaust pipe 12 near the end of the cooling preheating furnace 1.

[0037] More specifically, when the workpiece begins to cool down, simply turn on the electric exhaust fan 11. The fan blades inside the multi-head exhaust pipe 12 of the electric exhaust fan 11 generate suction to draw hot air from inside the cooling preheating furnace 1. The hot air circulation mechanism is heated first and the hot air is stored in heat. Then, the hot air is discharged to other external processes through the hot air circulation mechanism to achieve additional heat recovery.

[0038] As a preferred embodiment of this utility model, the hot air circulation mechanism includes a three-way pipe 8, an air outlet pipe 9, and a return air pipe 10. One end of the air outlet pipe 9 is fixedly connected to the end of the multi-head exhaust pipe 12 away from the cooling preheating furnace 1. The other end of the air outlet pipe 9 is fixedly connected to one end of the three-way pipe 8. The other two ends of the three-way pipe 8 are fixedly connected to the return air pipe 10 and an external pipe, respectively. The other end of the return air pipe 10 is fixedly connected to the cooling preheating furnace 1. A temperature monitoring sensor and a solenoid valve are installed inside the three-way pipe 8. A heat storage chamber 16 is opened inside both the multi-head exhaust pipe 12 and the air outlet pipe 9.

[0039] More specifically, when it is necessary to preheat the workpiece inside the cooling preheating furnace 1, the electric exhaust fan 11 is kept on. The fan blades of the electric exhaust fan 11 rotate to draw hot air from inside the cooling preheating furnace 1. This hot air enters the multi-head exhaust pipe 12 and the air outlet pipe 9 and is absorbed by the heat-absorbing liquid inside the heat storage chamber 16 of the multi-head exhaust pipe 12 and the air outlet pipe 9. The remaining hot air then enters the return air pipe 10 through the three-way pipe 8 and finally returns to the cooling preheating furnace 1 through the return air pipe 10, thereby maintaining the continuous preheating of the workpiece inside the cooling preheating furnace 1.

[0040] It is important to note that the heat-absorbing liquid can be liquid metal (sodium, potassium, sodium-potassium alloy). Such metal components have good chemical stability and do not decompose at high temperatures. They can also withstand temperatures above 600°C. Therefore, during cooling, when high-temperature gas above 600°C passes through, it will be absorbed by the liquid metal inside the heat storage chamber 16. The remaining heat will then be discharged to other external pipes through the three-way pipe 8. When preheating is required, the gas temperature may be only around 200°C. There is a temperature difference between the gas and the liquid metal, and the liquid metal can provide heat to the gas in the reverse direction. In conjunction with the return air pipe 10, preheating can be achieved.

[0041] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A cooling chamber and cold member flue gas preheating chamber, characterized in that: The cooling preheating furnace (1) includes a cooling preheating furnace (1), which is fixedly connected to several support pipes (2) on both sides. The cooling pipes (2) are connected to cooling mechanisms inside. Support components are also connected to both sides of the cooling preheating furnace (1). The two support components are connected to sealing mechanisms that seal the support pipes (2). An exhaust mechanism is connected to the upper surface of the cooling preheating furnace (1). A hot air circulation mechanism is connected to the other end of the exhaust mechanism. Several rollers (14) are rotatably connected to the bottom surface of the inner wall of the cooling preheating furnace (1).

2. The cooling chamber and cold component flue gas preheating chamber according to claim 1, characterized in that: The cooling mechanism includes a cross bracket (3) and a blower (13). The four ends of the cross bracket (3) are fixedly connected to the inner wall of the support tube (2). The middle part of the cross bracket (3) is fixedly connected to the motor of the blower (13). The fan blades of the blower (13) face the cooling preheating furnace (1), and the blower (13) is located on the side of the sealing mechanism away from the cooling preheating furnace (1).

3. The cooling chamber and cold component flue gas preheating chamber according to claim 1 or 2, characterized in that: The support assembly includes several support blocks (4), one end of each support block (4) is fixedly connected to the side wall of the cooling preheating furnace (1), and the other end of each support block (4) is connected to the sealing mechanism.

4. The cooling chamber and cold component flue gas preheating chamber according to claim 3, characterized in that: Several support tubes (2) have sockets (15) on their upper surfaces, and the sealing mechanism is located inside the sockets (15).

5. The cooling chamber and cold component flue gas preheating chamber according to claim 4, characterized in that: The sealing mechanism includes a sealing plate (6), a hydraulic rod (7) and several telescopic rods (5). The outer walls of the hydraulic rod (7) and several telescopic rods (5) are fixedly connected to several support blocks (4) on the same side of the cooling preheating furnace (1). The output end of the hydraulic rod (7) and the inner rods of several telescopic rods (5) pass through the support blocks (4) and are fixedly connected to the sealing plate (6). The sealing plate (6) is slidably connected to several sockets (15).

6. The cooling chamber and cold component flue gas preheating chamber according to claim 1, 2, 4 or 5, characterized in that: The exhaust mechanism includes a multi-head exhaust pipe (12) and several electric exhaust fans (11). One end of the multi-head exhaust pipe (12) is fixedly connected to the upper surface of the cooling preheating furnace (1), and the other end of the multi-head exhaust pipe (12) is connected to the hot air circulation mechanism. The fan blades of the several electric exhaust fans (11) are located inside the multi-head exhaust pipe (12) near the end of the cooling preheating furnace (1).

7. The cooling chamber and cold component flue gas preheating chamber according to claim 3, characterized in that: The exhaust mechanism includes a multi-head exhaust pipe (12) and several electric exhaust fans (11). One end of the multi-head exhaust pipe (12) is fixedly connected to the upper surface of the cooling preheating furnace (1), and the other end of the multi-head exhaust pipe (12) is connected to the hot air circulation mechanism. The fan blades of the several electric exhaust fans (11) are located inside the multi-head exhaust pipe (12) near the end of the cooling preheating furnace (1).

8. The cooling chamber and cold component flue gas preheating chamber according to claim 1, 2, 4, 5 or 7, characterized in that: The hot air circulation mechanism includes a three-way pipe (8), an air outlet pipe (9), and a return air pipe (10). One end of the air outlet pipe (9) is fixedly connected to the end of the multi-head exhaust pipe (12) away from the cooling preheating furnace (1). The other end of the air outlet pipe (9) is fixedly connected to one end of the three-way pipe (8). The other two ends of the three-way pipe (8) are fixedly connected to the return air pipe (10) and an external pipe, respectively. The other end of the return air pipe (10) is fixedly connected to the cooling preheating furnace (1). A temperature monitoring sensor and a solenoid valve are installed inside the three-way pipe (8). A heat storage chamber (16) is opened inside both the multi-head exhaust pipe (12) and the air outlet pipe (9).

9. The cooling chamber and cold component flue gas preheating chamber according to claim 3, characterized in that: The hot air circulation mechanism includes a three-way pipe (8), an air outlet pipe (9), and a return air pipe (10). One end of the air outlet pipe (9) is fixedly connected to the end of the multi-head exhaust pipe (12) away from the cooling preheating furnace (1). The other end of the air outlet pipe (9) is fixedly connected to one end of the three-way pipe (8). The other two ends of the three-way pipe (8) are fixedly connected to the return air pipe (10) and an external pipe, respectively. The other end of the return air pipe (10) is fixedly connected to the cooling preheating furnace (1). A temperature monitoring sensor and a solenoid valve are installed inside the three-way pipe (8). A heat storage chamber (16) is opened inside both the multi-head exhaust pipe (12) and the air outlet pipe (9).

10. The cooling chamber and cold component flue gas preheating chamber according to claim 6, characterized in that: The hot air circulation mechanism includes a three-way pipe (8), an air outlet pipe (9), and a return air pipe (10). One end of the air outlet pipe (9) is fixedly connected to the end of the multi-head exhaust pipe (12) away from the cooling preheating furnace (1). The other end of the air outlet pipe (9) is fixedly connected to one end of the three-way pipe (8). The other two ends of the three-way pipe (8) are fixedly connected to the return air pipe (10) and an external pipe, respectively. The other end of the return air pipe (10) is fixedly connected to the cooling preheating furnace (1). A temperature monitoring sensor and a solenoid valve are installed inside the three-way pipe (8). A heat storage chamber (16) is opened inside both the multi-head exhaust pipe (12) and the air outlet pipe (9).

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