Waste heat recovery device for furnace mouth of mesh belt furnace

Abstract

The utility model discloses a waste heat recovery device of a mesh belt furnace mouth, which belongs to the technical field of waste heat recovery of mesh belt furnaces and comprises a mesh belt furnace, a mounting frame fixedly mounted on the mesh belt furnace and a waste heat recovery box fixedly mounted on the mesh belt furnace through the mounting frame. A heat expansion component is arranged in the waste heat recycling box and used for conducting heat recycling on the flue gas temperature. According to the waste heat recovery device at the furnace mouth of the mesh belt furnace, the water tank and the water pump are arranged to be connected with the circulating pipe, and the cooling fins are installed to diffuse heat contained in high-temperature flue gas, so that waste heat generated by the mesh belt furnace can be further subjected to contact heat exchange and collection through water; in addition, an impeller is arranged to communicate with a waste heat recovery box after heat exchange to introduce low-temperature flue gas, the low-temperature flue gas drives the impeller to rotate, the impeller can drive a connecting shaft and a rotor to rotate, kinetic energy contained in the flue gas can be further converted into electric energy to be collected, and the recovery efficiency of the device is improved.

Description

Technical Field

[0001] The present application relates to the field of waste heat recovery of mesh belt furnaces, and in particular to a waste heat recovery device for a mesh belt furnace mouth. Background Art

[0002] The mesh belt furnace is an industrial heat treatment equipment, usually used for heating metal products. It uses a mesh belt conveyor to pass the metal products to be treated through the furnace for heating, heat treatment, quenching and other processes. The mesh belt furnace usually has an automated control system that can accurately control the heating temperature, holding time and cooling speed to ensure that the metal products achieve the desired heat treatment effect.

[0003] Refer to the utility model with announcement number CN206222668U, a waste heat recovery device for a mesh belt furnace mouth, comprising a recovery body, a water circulation system consisting of a water inlet pipe and a water outlet pipe; a cavity is provided in the recovery body, and the water inlet pipe and the water outlet pipe are respectively connected to the cavity; the recovery body comprises a front face, two side faces and a heated bottom face, and the front face is inclined toward the mesh belt furnace. The waste heat recovery device provided by the utility model has the advantages of simple structure, capable of recovering waste heat from the mesh belt furnace, reducing the heat impact on operators in front of the mesh belt furnace, and increasing the operating space.

[0004] Referring to the above technical scheme, the heat emitted from the feed port of the mesh belt furnace is recovered, but the heat emitted from the mesh belt furnace mouth is not limited to the heat dissipation at the feed port, but also includes the high-temperature zone where heat is generated in the mesh belt furnace. There is also a large amount of heat in the waste flue gas generated in the high-temperature zone of the mesh belt furnace. The above technical scheme does not preheat and recover the flue gas. There is still a certain amount of energy waste when these high-temperature flue gases are directly discharged. Therefore, a waste heat recovery device for the mesh belt furnace mouth is proposed to solve the above-mentioned problem. Utility Model Content

[0005] In view of the deficiencies in the prior art, the present application provides a waste heat recovery device for a mesh belt furnace outlet, which has the advantages of being able to recover waste heat from the mesh belt furnace exhaust outlet and improving the waste heat recovery rate.

[0006] In summary, the present application provides the following technical solutions: a waste heat recovery device for a mesh belt furnace port, comprising a mesh belt furnace, a mounting frame fixedly mounted on the mesh belt furnace, and a waste heat recovery box fixedly mounted on the mesh belt furnace via the mounting frame, wherein a heat expansion component is provided in the waste heat recovery box for recovering heat from flue gas temperature;

[0007] The heat expansion component includes a fin rack fixedly installed in the waste heat recovery box, heat dissipation fins fixedly installed on the fin rack, and a water circulation component for contacting the heat dissipation fins.

[0008] By adopting the above technical solution, additional waste heat can be recovered at the furnace mouth of the mesh belt furnace except the feed inlet, effectively improving the waste heat recovery utilization rate.

[0009] Furthermore, an exhaust pipe for discharging waste flue gas is installed on the top of the mesh belt furnace, a filter is installed on the exhaust pipe, and a connecting pipe is connected between the waste heat recovery box and the exhaust pipe.

[0010] By adopting the above technical solution, the high-temperature flue gas in the mesh belt furnace can be connected to complete waste heat recovery.

[0011] Furthermore, the water circulation assembly includes a water tank fixedly installed on the top of the mesh belt furnace frame, a circulation pipe connected to the water tank and extending to the waste heat recovery tank, and a water pump for providing power, and the water inlet and outlet ends of the water pump are both connected to the circulation pipe.

[0012] By adopting the above technical solution, water can circulate under the action of the water pump to contact and collect the heat generated by the waste heat recovery box.

[0013] Furthermore, the circulation pipe is coiled in an S-shape and extends through a plurality of the heat dissipation fins.

[0014] By adopting the above technical solution, the contact area between the circulation tube and the heat dissipation fins can be increased, thereby improving the heat exchange efficiency.

[0015] Furthermore, a flow rate utilization device for utilizing the flue gas flow rate is provided on the top of the water tank, and the flow rate utilization device includes an impeller partially fixedly installed on the top of the water tank, an air inducing member fixedly installed at one end of the impeller, and a power generation component connected to the impeller for converting kinetic energy into electrical energy for collection.

[0016] By adopting the above technical solution, a large amount of flue gas kinetic energy can be further utilized.

[0017] Furthermore, the air inducing member includes an air diffuser hood, and the wide-mouth end of the air diffuser hood is fixedly connected to the impeller housing.

[0018] By adopting the above technical solution, the flow of smoke can be guided.

[0019] Furthermore, the power generation assembly includes a mounting shell fixedly mounted on the top of the water tank, a stator fixedly mounted in the mounting shell, a rotor rotatably mounted in the mounting shell, and an excitation magnetic disk for connecting the rotor and the stator. The mounting shell has a connecting shaft extending rotatably on one end toward the impeller, one end of the connecting shaft is fixedly connected to the shaft core of the impeller, and the other end is fixedly connected to the rotor.

[0020] By adopting the above technical solution, the kinetic energy of the flue gas can be converted into electrical energy for storage.

[0021] Furthermore, a partition member is provided on the outside of the mounting shell, and the partition member includes a baffle and a buckle that are buckled on the outside of the connecting shaft, wherein one end of the baffle is provided with a movable groove extending to the middle of the baffle, and the movable groove corresponds to the connecting shaft, and the buckle is fixedly installed with a pin on one end of the baffle, and the pin is inserted into one side of the baffle.

[0022] By adopting the above technical solution, the smoke passing through the impeller can be reduced from remaining outside the installation shell to cause pollution.

[0023] The waste heat recovery device at the furnace mouth of the mesh belt furnace is equipped with a water tank and a water pump connected to a circulation pipe, and heat dissipation fins are installed to diffuse the heat contained in the high-temperature flue gas, so that the waste heat generated by the mesh belt furnace can be further collected through contact heat exchange with water. In addition, an impeller is arranged to connect the waste heat recovery box after the heat exchange to introduce low-temperature flue gas. The low-temperature flue gas drives the impeller to rotate, so that the impeller can drive the connecting shaft and the rotor to rotate, so that the kinetic energy contained in the flue gas can be further converted into electrical energy for collection, thereby improving the recovery efficiency of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of this application;

[0025] Figure 2 It is a structural schematic diagram of the waste heat recovery box of this application;

[0026] Figure 3 This application Figure 1 A magnified view of the structure at center A;

[0027] Figure 4 It is a structural stereogram of the baffle of the present application.

[0028] Description of reference numerals:

[0029] 1. Mesh belt furnace; 2. Exhaust pipe; 3. Mounting frame; 4. Waste heat recovery box; 5. Connecting pipe; 6. Fin rack; 7. Heat dissipation fins; 8. Circulation pipe; 9. Water tank; 10. Water pump; 11. Impeller; 12. Air hood; 13. Mounting shell; 14. Connecting shaft; 15. Rotor; 16. Stator; 17. Excitation disk; 18. Baffle; 19. Movable slot; 20. Buckle; 21. Latch. DETAILED DESCRIPTION

[0030] See also Figure 1In this embodiment, a waste heat recovery device for a mesh belt furnace outlet comprises a mesh belt furnace 1, a mounting frame 3 fixedly mounted on the mesh belt furnace 1, and a waste heat recovery box 4 fixedly mounted on the mesh belt furnace 1 through the mounting frame 3, wherein an exhaust pipe 2 for discharging waste flue gas is mounted on the top of the mesh belt furnace 1, and a filter is mounted on the exhaust pipe 2, so that the exhaust pipe 2 as the outlet of the mesh belt furnace 1 can filter the waste flue gas, and a connecting pipe 5 is connected between the waste heat recovery box 4 and the exhaust pipe 2, which can facilitate the circulation of the filtered flue gas.

[0031] See also Figure 1-2 In this embodiment, a heat expansion component is provided in the waste heat recovery box 4 for recovering heat from the flue gas temperature, wherein the heat expansion component includes a fin rack 6 fixedly installed in the waste heat recovery box 4, heat dissipating fins 7 fixedly installed on the fin rack 6, and a water circulation component for contacting the heat dissipating fins 7.

[0032] Specifically, the high-temperature flue gas entering the waste heat recovery box 4 is contacted by a plurality of arranged heat dissipating fins 7, so that the heat contained in the flue gas is rapidly diffused along the surface of the heat dissipating fins 7, and the heat is conducted to the water in the water circulation component for recovery.

[0033] See also Figure 1-2 In this embodiment, the water circulation component includes a water tank 9 fixedly installed on the top of the mesh belt furnace 1 frame, a circulation pipe 8 connected to the water tank 9 and extending to the waste heat recovery tank 4, and a water pump 10 for providing power. The water inlet and the discharge end of the water pump 10 are both connected to the circulation pipe 8. The circulation pipe 8 is coiled in an S shape and extends through a plurality of heat dissipating fins 7, so that the water in the circulation pipe 8 can be in uniform contact with the heat dissipating fins 7.

[0034] See also Figure 1 and Figure 3 In order to further utilize a large amount of flue gas kinetic energy, a flow rate utilization device for utilizing the flue gas flow rate is provided on the top of the water tank 9. The flow rate utilization device includes an impeller 11 partially fixedly installed on the top of the water tank 9, an air induction member fixedly installed at one end of the impeller 11, and a power generation component connected to the impeller 11 for converting kinetic energy into electrical energy for collection.

[0035] Furthermore, the air induced component includes an air diffuser 12, the wide-mouth end of the air diffuser 12 is fixedly connected to the outer shell of the impeller 11, and when connected to the connecting pipe 5, the flue gas passing through the waste heat recovery box 4 can be discharged toward the impeller 11, so that the movable part of the impeller 11 can rotate relative to the fixed part fixed on the water tank 9 under the push of the exhaust gas.

[0036] See also Figure 4In this embodiment, the power generation assembly includes a mounting shell 13 fixedly mounted on the top of the water tank 9, a stator 16 fixedly mounted in the mounting shell 13, a rotor 15 rotatably mounted in the mounting shell 13, and an excitation magnetic disk 17 for connecting the rotor 15 and the stator 16. The stator 16 is fixed to the inner wall of the mounting shell 13. The mounting shell 13 has a connecting shaft 14 extending rotatably toward one end of the impeller 11. One end of the connecting shaft 14 is fixedly connected to the shaft core of the impeller 11, and the other end is fixedly connected to the rotor 15. By rotating the impeller 11, the power can be transmitted to the rotor 15 through the connecting shaft 14, so that the rotor 15 rotates relative to the stator 16.

[0037] In the above embodiment, the stator 16 and the rotor 15 are both existing standard parts. When the rotor 15 rotates, it overcomes the electromagnetic braking torque generated by the excitation disk 17, thereby generating a voltage. At this time, the excitation disk 17 is externally connected to a capacitor to store electrical energy, or the generated electrical energy is directly supplied to supplement the driving water pump 10, so as to reduce the energy consumption required for the operation of the equipment itself.

[0038] See also Figure 3-4 In order to reduce the pollutants on the outside of the mounting shell 13 caused by the smoke being discharged directly through the impeller 11, a partition member is provided on the outside of the mounting shell 13. The partition member includes a baffle 18 and a buckle 20 that are buckled on the outside of the connecting shaft 14, wherein one end of the baffle 18 is provided with a movable groove 19 extending to the middle of the baffle 18, and the movable groove 19 corresponds to the connecting shaft 14, and can be lowered to the outside of the mounting shell 13 in a manner of pushing the baffle 18 to move.

[0039] The buckle 20 and the movable groove 19 have the same width, which can facilitate blocking and closing the opening part of the movable groove 19, so that the baffle 18 is restricted to the outside of the connecting shaft 14. It is worth noting that the movable groove 19 should have a certain gap for the connecting shaft 14 to rotate and connect to reduce rotation obstacles.

[0040] In addition, a latch pin 21 is fixedly mounted on one end of the buckle 20 facing the baffle 18 , and the latch pin 21 is inserted into one side of the baffle 18 , so that the connection stability of the buckle 20 relative to the baffle 18 can be improved through the buckle 20 .

[0041] The working principle of the above embodiment is:

[0042] The high-temperature flue gas generated by the mesh belt furnace 1 is connected to the waste heat recovery box 4 through the connecting pipe 5, and then the high-temperature flue gas enters the waste heat recovery box 4 and contacts the heat dissipation fins 7, so that the heat is quickly transferred on the surface of the heat dissipation fins 7, and the circulation pipe 8 contacting the heat dissipation fins 7 concentrates the waste heat in the water flowing in the circulation pipe 8, and the water temperature in the water tank 9 is gradually increased by the pumping of the water pump 10 to complete the recovery and utilization of the waste heat. After the waste heat recovery and utilization is completed, the low-temperature flue gas continues to flow along the connecting pipe 5 until the low-temperature flue gas is blown to one side of the impeller 11 through the air expansion hood 12, and the impeller 11 rotates relative to the installed bracket and drives the fixedly connected connecting shaft 14 to rotate synchronously. The connecting shaft 14 drives the fixedly connected rotor 15 to rotate in the installation shell 13 under the rotation, and the rotor 15 rotates relative to the stator 16 and the excitation disk 17, so that the rotor 15 overcomes the electromagnetic braking torque generated by the excitation disk 17 when rotating, thereby generating voltage, and completing the further recovery and utilization of the flue gas.

Claims

1. A waste heat recovery device for a mesh belt furnace port, comprising a mesh belt furnace (1), a mounting frame (3) fixedly mounted on the mesh belt furnace (1), and a waste heat recovery box (4) fixedly mounted on the mesh belt furnace (1) via the mounting frame (3), characterized in that: The waste heat recovery box (4) is provided with a heat expansion component for recovering heat from the flue gas temperature; The heat expansion component comprises a fin rack (6) fixedly mounted in the waste heat recovery box (4), heat dissipation fins (7) fixedly mounted on the fin rack (6), and a water circulation component for contacting the heat dissipation fins (7).

2. The waste heat recovery device for a mesh belt furnace according to claim 1, characterized in that: An exhaust pipe (2) for discharging waste flue gas is installed on the top of the mesh belt furnace (1), a filter is installed on the exhaust pipe (2), and a connecting pipe (5) is connected between the waste heat recovery box (4) and the exhaust pipe (2).

3. The waste heat recovery device for a mesh belt furnace according to claim 1, characterized in that: The water circulation assembly comprises a water tank (9) fixedly mounted on the top of the frame of the mesh belt furnace (1), a circulation pipe (8) connected to the water tank (9) and extending to the waste heat recovery tank (4), and a water pump (10) for providing power, wherein the water inlet and outlet ends of the water pump (10) are both connected to the circulation pipe (8).

4. The waste heat recovery device for a mesh belt furnace according to claim 3, characterized in that: The circulation pipe (8) is coiled and extends in an S shape and passes through a plurality of the heat dissipation fins (7).

5. The waste heat recovery device for a mesh belt furnace according to claim 3, characterized in that: A flow rate utilization device for utilizing the flue gas flow rate is provided on the top of the water tank (9), the flow rate utilization device comprising an impeller (11) partially fixedly mounted on the top of the water tank (9), an air induction member fixedly mounted at one end of the impeller (11), and a power generation component connected to the impeller (11) for converting kinetic energy into electrical energy for collection.

6. The waste heat recovery device for a mesh belt furnace according to claim 5, characterized in that: The air inducing member comprises an air diffuser cover (12), wherein a wide-mouth end of the air diffuser cover (12) is fixedly connected to an outer shell of the impeller (11).

7. The waste heat recovery device for a mesh belt furnace according to claim 6, characterized in that: The power generation assembly comprises a mounting shell (13) fixedly mounted on the top of the water tank (9), a stator (16) fixedly mounted in the mounting shell (13), a rotor (15) rotatably mounted in the mounting shell (13), and an excitation magnetic disk (17) for connecting the rotor (15) and the stator (16), wherein a connecting shaft (14) is rotatably extended from one end of the mounting shell (13) toward the impeller (11), one end of the connecting shaft (14) is fixedly connected to the shaft core of the impeller (11), and the other end is fixedly connected to the rotor (15).

8. The waste heat recovery device for a mesh belt furnace according to claim 7, characterized in that: A partition member is arranged outside the mounting shell (13), and the partition member comprises a baffle (18) and a buckle (20) which are buckled on the outside of the connecting shaft (14), wherein one end of the baffle (18) is provided with a movable groove (19) extending to the middle of the baffle (18), and the movable groove (19) corresponds to the connecting shaft (14); and a latch (21) is fixedly mounted on one end of the buckle (20) facing the baffle (18), and the latch (21) is inserted into one side of the baffle (18).

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