Annealing system waste heat recovery device

Abstract

This utility model relates to the field of waste heat recovery technology and discloses a waste heat recovery device for an annealing system. It includes a flue gas pipe, a reversing mechanism fixedly connected to the side of the flue gas pipe, a first branch pipe fixedly connected to the end of the reversing mechanism away from the flue gas pipe, and a second branch pipe fixedly connected to the other end of the reversing mechanism away from the flue gas pipe. A raw material box is fixedly connected to the side of the first branch pipe away from the reversing mechanism, and a heat exchanger is fixedly connected to the side of the second branch pipe away from the reversing mechanism. This utility model, by providing a flue gas pipe, a reversing mechanism, a first branch pipe, and a second branch pipe, allows the reversing mechanism to control the connection between the flue gas pipe and either the first or second branch pipe. When connected to the first branch pipe, high-temperature flue gas flows into the raw material box to preheat the raw material. After preheating, when the raw material is sent to the annealing system for processing, the reversing mechanism seals the first branch pipe and connects the second branch pipe to the flue gas pipe, enabling continuous waste heat recovery.

Description

Technical Field

[0001] This utility model relates to the field of waste heat recovery technology, and more specifically to a waste heat recovery device for annealing systems. Background Technology

[0002] The residual heat of the annealing system refers to the excess heat generated during the annealing process. This heat can be recovered and utilized through specific technologies and equipment to save energy and reduce environmental pollution. The residual heat of the workpiece after forging or rolling is used for immediate heating and annealing. Residual heat annealing is a heat treatment process that uses the residual heat of the workpiece after forging or rolling for immediate heating and annealing, which can effectively save energy.

[0003] The residual heat annealing process is suitable for mass production of workpieces, especially for workpieces annealed in a continuous annealing furnace. When using this residual heat annealing process, the final forging temperature must be strictly controlled. If the temperature is higher than the critical point of the steel, the residual heat annealing will not be able to refine the grains, so this must be given full attention.

[0004] After residual heat annealing, the heated flue gas is discharged. However, the flue gas temperature is still high at this time. If it is discharged directly into the environment, it will cause pollution to the external environment. Nowadays, the hot flue gas is usually exchanged with cold water for heat, but this method wastes a lot of heat. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a device for reusing waste heat of annealing system to solve the problems existing in the background art.

[0006] This utility model provides the following technical solution: a waste heat recovery device for an annealing system, including a flue gas pipe. A reversing mechanism is fixedly connected to the side of the flue gas pipe. A first branch pipe is fixedly connected to one end of the reversing mechanism away from the flue gas pipe, and a second branch pipe is fixedly connected to the other end of the reversing mechanism away from the flue gas pipe. A raw material box is fixedly connected to the side of the first branch pipe away from the reversing mechanism, and a heat exchanger is fixedly connected to the side of the second branch pipe away from the reversing mechanism. Connecting pipes are fixedly connected to the sides of the heat exchanger and the raw material box away from the reversing mechanism. An exhaust mechanism is fixedly connected to the sides of the two connecting pipes away from the raw material box. The reversing mechanism includes a connecting cylinder for receiving hot flue gas from the flue gas pipe. A sealing block is movably connected inside the connecting cylinder, and the sealing block can seal the first branch pipe and the second branch pipe respectively.

[0007] Furthermore, a rotating rod is fixedly connected to the side of the sealing block, a rotating shaft is fixedly connected inside the rotating rod, a servo motor is fixedly connected to the bottom end of the rotating shaft, and a sealing plate is fixedly connected to the top end of the connecting cylinder.

[0008] Furthermore, a heat insulation plate is fixedly connected to the bottom end of the connecting cylinder, the bottom end of the heat insulation plate is fixedly connected to the top end of the servo motor, and a support rod is fixedly connected to the bottom end of the heat insulation plate.

[0009] Furthermore, the exhaust mechanism includes a gas chamber for receiving flue gas from the connecting pipe, a spray nozzle is fixedly connected to the top of the gas chamber, and an exhaust channel is fixedly connected to the top of the gas chamber away from the connecting pipe.

[0010] Furthermore, a water storage tank is fixedly connected to the bottom of the gas chamber. The water storage tank receives the water mist sprayed from the spray nozzle, and the water in the water storage tank can be resupplied to the spray nozzle for use.

[0011] The technical effects and advantages of this utility model are as follows:

[0012] 1. This utility model includes a flue pipe, a reversing mechanism, a first branch pipe, and a second branch pipe. The reversing mechanism can control the connection between the flue pipe and the first or second branch pipe. When connected to the first branch pipe, the high-temperature flue gas will be passed into the raw material box to preheat the raw material. After the raw material is preheated, when it is sent to the annealing system for processing, the reversing mechanism seals the first branch pipe and connects the second branch pipe to the flue pipe, so that the whole system can perform continuous waste heat recovery.

[0013] 2. This utility model is equipped with a gas chamber, an exhaust channel, and spray nozzles. After the flue gas is used through the raw material box and heat exchanger, it enters the connecting pipe. Although the temperature of the flue gas is reduced to a certain extent, direct discharge will also raise the ambient temperature. Therefore, the flue gas in the connecting pipe is passed into the gas chamber and sprayed by the spray nozzles. After spraying, it is cooled down again and the dust in the flue gas is removed. The clean and low-temperature gas is discharged from the exhaust channel. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0015] Figure 2 This is a schematic diagram of the overall structure of the reversing mechanism of this utility model.

[0016] Figure 3 This is an exploded structural diagram of the reversing mechanism of this utility model.

[0017] Figure 4 This is a schematic diagram of the overall structure of the exhaust mechanism of this utility model.

[0018] Figure 5 This is a schematic diagram of the internal structure of the exhaust mechanism of this utility model.

[0019] The attached diagram is labeled as follows: 1. Flue gas pipe; 2. Reversing mechanism; 201. Connecting cylinder; 202. Sealing plate; 203. Heat insulation plate; 204. Support rod; 205. Servo motor; 206. Rotating shaft; 207. Rotating rod; 208. Sealing block; 3. First branch pipe; 4. Second branch pipe; 5. Raw material box; 6. Heat exchanger; 7. Connecting pipe; 8. Exhaust mechanism; 801. Gas chamber; 802. Discharge channel; 803. Spray nozzle; 804. Water storage tank. Detailed Implementation

[0020] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] Reference Figure 1 This utility model provides a waste heat recovery device for an annealing system, including a flue pipe 1. A reversing mechanism 2 is fixedly connected to the side of the flue pipe 1. A first branch pipe 3 is fixedly connected to one end of the reversing mechanism 2 away from the flue pipe 1, and a second branch pipe 4 is fixedly connected to the other end of the reversing mechanism 2 away from the flue pipe 1. A raw material box 5 is fixedly connected to the side of the first branch pipe 3 away from the reversing mechanism 2. A heat exchanger 6 is fixedly connected to the side of the second branch pipe 4 away from the reversing mechanism 2. Connecting pipes 7 are fixedly connected to the sides of the heat exchanger 6 and the raw material box 5 away from the reversing mechanism 2. An exhaust mechanism 8 is fixedly connected to the sides of the two connecting pipes 7 away from the raw material box 5.

[0022] In this embodiment, when the flue gas pipe 1 is connected to the first branch pipe 3, the high-temperature flue gas will be passed into the raw material box 5 to preheat the raw material. After the raw material is preheated, when the raw material is sent to the annealing system for processing, the reversing mechanism 2 seals the first branch pipe 3 and connects the second branch pipe 4 to the flue gas pipe 1. The whole system can perform continuous waste heat recovery, and the utilization rate of waste heat is higher.

[0023] Reference Figure 2 and Figure 3 The reversing mechanism 2 includes a connecting cylinder 201 for receiving hot flue gas from the flue gas pipe 1. A sealing block 208 is movably connected inside the connecting cylinder 201. The sealing block 208 can seal the first branch pipe 3 and the second branch pipe 4 respectively. A rotating rod 207 is fixedly connected to the side of the sealing block 208. A rotating shaft 206 is fixedly connected inside the rotating rod 207. A servo motor 205 is fixedly connected to the bottom end of the rotating shaft 206. A sealing plate 202 is fixedly connected to the top end of the connecting cylinder 201. A heat insulation plate 203 is fixedly connected to the bottom end of the connecting cylinder 201. The bottom end of the heat insulation plate 203 is fixedly connected to the top end of the servo motor 205. A support rod 204 is fixedly connected to the bottom end of the heat insulation plate 203.

[0024] In this embodiment, when the rotating shaft 206 rotates, it drives the sealing block 208 to rotate via the rotating rod 207. The sealing block 208 seals the side of the second branch pipe 4. The flue gas pipe 1 is connected to the first branch pipe 3, so the hot flue gas will enter the raw material box 5 to preheat the raw materials in the raw material box 5. When the flue gas pipe 1 is connected to the second branch pipe 4, the hot flue gas will enter the heat exchanger 6 to exchange heat with the low temperature water, and continuously perform waste heat recovery. The servo motor 205 is provided with a heat insulation plate 203 above it, so it can isolate the heat in the connecting cylinder 201 and prevent the servo motor 205 from failing to work properly due to excessive temperature.

[0025] Reference Figure 4 and Figure 5 The exhaust mechanism 8 includes a gas chamber 801 that can receive flue gas from the connecting pipe 7. A spray nozzle 803 is fixedly connected to the top of the gas chamber 801. An exhaust channel 802 is fixedly connected to the top of the gas chamber 801 away from the connecting pipe 7. A water storage tank 804 is fixedly connected to the bottom of the gas chamber 801. The water storage tank 804 receives water mist sprayed from the spray nozzle 803, and the water in the water storage tank 804 can be resupplied to the spray nozzle 803 for use.

[0026] In this embodiment, the flue gas after heat exchange in the raw material box 5 and the flue gas in the heat exchanger 6 both enter the exhaust mechanism 8 through the connecting pipe 7. At this time, the flue gas still has a certain temperature and cannot be directly discharged. Therefore, after the flue gas enters the exhaust mechanism 8, the spray nozzle 803 sprays water mist downwards to thoroughly reduce the flue gas and remove dust from it. At this time, the clean gas is discharged from the discharge channel 802, and the water storage tank 804 collects the water mist sprayed by the spray nozzle 803 so that it can be reused, thus saving water resources.

[0027] The working principle of this utility model is as follows: When the annealing system is working, it will discharge hot flue gas into the flue gas pipe 1. At this time, the servo motor 205 starts and drives the rotating shaft 206 to rotate. When the rotating shaft 206 rotates, it drives the sealing block 208 to rotate through the rotating rod 207. The sealing block 208 seals the side of the second branch pipe 4. The flue gas pipe 1 is connected to the first branch pipe 3. Therefore, the hot flue gas will enter the raw material box 5 and preheat the raw materials in the raw material box 5.

[0028] After the raw materials in the raw material box 5 are preheated, the servo motor 205 controls the rotating shaft 206 to rotate again. At this time, the rotating rod 207 drives the sealing block 208 to rotate, and the sealing block 208 seals the first branch pipe 3. At this time, the raw materials in the raw material box 5 can be sent to the annealing system. At the same time, the flue gas pipe 1 is connected to the second branch pipe 4, so the hot flue gas will enter the heat exchanger 6 to exchange heat with the low temperature water, and continuously carry out waste heat recovery work.

[0029] The flue gas after heat exchange in the raw material box 5 and the flue gas in the heat exchanger 6 will enter the exhaust mechanism 8 through the connecting pipe 7. After the flue gas enters the exhaust mechanism 8, the spray nozzle 803 will spray water mist downwards, thereby thoroughly reducing the flue gas and removing dust from the flue gas. At this time, the clean gas will be discharged from the exhaust channel 802, and the water storage tank 804 will collect the water mist sprayed by the spray nozzle 803, so that it can be reused and save water resources.

[0030] In conclusion, the above are merely preferred embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A waste heat recovery device for an annealing system, comprising a flue gas pipe (1), characterized in that: A reversing mechanism (2) is fixedly connected to the side of the flue gas pipe (1). A first branch pipe (3) is fixedly connected to one end of the reversing mechanism (2) away from the flue gas pipe (1), and a second branch pipe (4) is fixedly connected to the other end of the reversing mechanism (2) away from the flue gas pipe (1). A raw material box (5) is fixedly connected to the side of the first branch pipe (3) away from the reversing mechanism (2), and a heat exchanger (6) is fixedly connected to the side of the second branch pipe (4) away from the reversing mechanism (2). (6) Connecting pipes (7) are fixedly connected to the side of the raw material box (5) away from the reversing mechanism (2), and exhaust mechanism (8) is fixedly connected to the side of the two connecting pipes (7) away from the raw material box (5); the reversing mechanism (2) includes a connecting cylinder (201) for receiving hot flue gas in the flue gas pipe (1), and a sealing block (208) is movably connected inside the connecting cylinder (201), and the sealing block (208) can seal the first branch pipe (3) and the second branch pipe (4) respectively.

2. The annealing system waste heat recovery device according to claim 1, characterized in that: A rotating rod (207) is fixedly connected to the side of the sealing block (208), a rotating shaft (206) is fixedly connected inside the rotating rod (207), a servo motor (205) is fixedly connected to the bottom end of the rotating shaft (206), and a sealing plate (202) is fixedly connected to the top end of the connecting cylinder (201).

3. The annealing system waste heat recovery device according to claim 2, characterized in that: A heat insulation plate (203) is fixedly connected to the bottom end of the connecting cylinder (201). The bottom end of the heat insulation plate (203) is fixedly connected to the top end of the servo motor (205). A support rod (204) is fixedly connected to the bottom end of the heat insulation plate (203).

4. The annealing system waste heat recovery device according to claim 1, characterized in that: The exhaust mechanism (8) includes a gas chamber (801) for receiving flue gas from the connecting pipe (7), a spray nozzle (803) is fixedly connected to the top of the gas chamber (801), and an exhaust channel (802) is fixedly connected to the top of the gas chamber (801) away from the connecting pipe (7).

5. The annealing system waste heat recovery device according to claim 4, characterized in that: A water storage tank (804) is fixedly connected to the bottom of the gas chamber (801). The water storage tank (804) receives water mist sprayed from the spray nozzle (803), and the water in the water storage tank (804) can be resupplied to the spray nozzle (803) for use.

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