Heat treatment production line capable of effectively utilizing waste heat

Abstract

According to the heat treatment production line capable of effectively utilizing the waste heat, the waste heat transmission pipeline is additionally arranged between the solid solution furnace and the aging furnace, waste heat gas generated in the solid solution treatment process of an alloy workpiece is transmitted into the aging furnace through the waste heat transmission pipeline to heat the workpiece, the aging furnace does not need to be provided with an additional combustion device, and the production cost is reduced. And the energy consumption and the production cost can be effectively reduced. Waste heat generated in the solid solution furnace is directly guided into the aging furnace, and a complex heat recovery device does not need to be arranged. Meanwhile, a gas flow valve is arranged on the waste heat leading-in branch pipe, and a pressure limiting valve is arranged at the tail end of the waste heat transmission main pipe, so that the gas input condition of each temperature zone in the aging furnace can be adjusted according to the actual working condition, and the ideal aging temperature is kept in each temperature zone. The heat treatment production line provided by the utility model is simple in structure and easy to realize, improves the effective utilization rate of energy, and finally achieves the effects of energy conservation and emission reduction.

Description

Technical Field

[0001] The utility model relates to heat treatment equipment, in particular to a heat treatment production line which effectively utilizes waste heat. Background Art

[0002] During the processing of alloy materials, heat treatment processes are used to enhance the mechanical properties of workpieces. For example, aluminum alloy workpieces need to be placed in an aging furnace for aging treatment after solid solution strengthening. The solid solution temperature of aluminum alloys can usually reach 540°C, while the aging temperature is usually around 150°C, and the solid solution time and aging time often reach several hours or even more than ten hours. In the prior art, both the solid solution furnace and the aging furnace are equipped with separate heating units, each connected to external gas. The waste heat generated after the combustion of the gas is directly discharged with the high-temperature flue gas, resulting in a large amount of heat waste. In the prior art, some waste heat recovery devices are set up specifically, but there is a common problem of complex connecting pipelines, and a large amount of waste heat will still be lost during the waste heat recovery process, thereby affecting the energy utilization rate. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a heat treatment production line that effectively utilizes waste heat, including a solid solution furnace body and an aging furnace body arranged in a heat treatment sequence, a transition roller for transmitting alloy is arranged between the discharge port of the solid solution furnace body and the feed port of the aging furnace body, and a gas inlet connected to an external gas device is arranged on the solid solution furnace body; the characteristics are:

[0004] A waste heat transmission pipeline and an exhaust gas transmission pipeline are also provided, wherein the waste heat transmission pipeline is connected to the interior of the solid solution furnace body and the aging furnace body respectively; one end of the exhaust gas transmission pipeline is connected to the interior of the aging furnace body.

[0005] Furthermore, a pressurizing fan is arranged in the waste heat transmission pipeline, and a smoke exhaust fan is arranged in the transmission pipeline.

[0006] Furthermore, the solid solution furnace body is a continuous solid solution furnace, and the aging furnace body is a continuous aging furnace. The solid solution furnace body and the aging furnace body are divided into multiple temperature zones according to the workpiece transmission direction.

[0007] Furthermore, the waste heat transfer pipeline includes a waste heat transfer main pipe and a waste heat export branch pipe and a waste heat import branch pipe distributed and connected to the side of the waste heat transfer main pipe; the pressurized fan is arranged in the waste heat transfer main pipe, and the other end of the waste heat export branch pipe is respectively connected to the waste heat outlet of a temperature zone of the solid solution furnace body, and the other end of the waste heat import branch pipe is respectively connected to the waste heat inlet of a temperature zone of the aging furnace body.

[0008] Furthermore, the surfaces of the waste heat transfer main pipe, the waste heat export branch pipe and the waste heat import branch pipe are all wrapped with a thermal insulation layer.

[0009] Furthermore, the exhaust gas transmission pipeline also includes an exhaust main pipe and exhaust branch pipes distributed and connected to the sides of the exhaust main pipe. The exhaust fan is arranged in the exhaust main pipe, and each exhaust branch pipe is connected to the exhaust gas outlet of a temperature zone of the aging furnace body.

[0010] Furthermore, each of the waste heat introduction branch pipes is provided with a gas flow valve, and the control center transmits a switch signal to the gas flow valve according to the temperature signal fed back from each temperature zone.

[0011] Furthermore, the end of the waste heat transfer main pipe is connected to the smoke exhaust main pipe, and a pressure limiting valve is arranged at the end of the waste heat transfer main pipe.

[0012] Furthermore, a circulation fan is arranged at the top of each temperature zone.

[0013] Furthermore, a quenching station is provided between the solution furnace body and the aging furnace body.

[0014] The utility model provides a heat treatment production line that effectively utilizes waste heat. A waste heat transmission pipeline is added between the solution furnace and the aging furnace. The waste heat gas generated by the alloy workpiece during the solution treatment process is transported to the aging furnace by the waste heat transmission pipeline to heat the workpiece. The aging furnace does not need to install additional combustion devices, which can effectively reduce energy consumption and production costs. The waste heat generated in the solution furnace is directly introduced into the aging furnace, and there is no need to set up a complex heat recovery device.

[0015] At the same time, a gas flow valve is set on the waste heat introduction branch pipe and a pressure limiting valve is set at the end of the waste heat transmission main pipe. The gas input conditions of each temperature zone in the aging furnace can be adjusted according to the actual working conditions to maintain the ideal aging temperature in each temperature zone. It is particularly suitable for continuous aging process.

[0016] The heat treatment production line provided by the utility model has a simple structure and is easy to implement, thereby improving the effective utilization rate of energy and ultimately achieving the effect of energy saving and emission reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of a heat treatment production line that effectively utilizes waste heat according to the utility model;

[0018] Figure 2 It is a connection diagram of the waste heat transmission pipeline and the exhaust gas transmission pipeline on the aging furnace body.

[0019] Figure numerals: solution furnace body 1, aging furnace body 2, transition roller 3, gas inlet 4, pressurized fan 5, smoke exhaust fan 6, waste heat transfer main pipe 7, waste heat export branch pipe 8, waste heat import branch pipe 9, waste heat nozzle 10, circulation fan 11, gas flow valve 12, smoke exhaust main pipe 13, smoke exhaust branch pipe 14, pressure limiting valve 15, quenching station 16. DETAILED DESCRIPTION

[0020] like Figure 1 and Figure 2 A heat treatment production line for effectively utilizing waste heat is shown, comprising a solution furnace body 1 and an aging furnace body 2 arranged in a heat treatment sequence, a transition roller 3 for transmitting alloy is arranged between the discharge port of the solution furnace body 1 and the feed port of the aging furnace body 2, and a gas inlet 4 connected to an external gas equipment is arranged on the solution furnace body 1.

[0021] A waste heat transmission pipeline and an exhaust gas transmission pipeline are also provided, wherein the waste heat transmission pipeline is connected to the interior of the solid solution furnace body 1 and the aging furnace body 2 respectively, and a pressurized fan 5 is arranged in the waste heat transmission pipeline to transfer the waste heat in the solid solution furnace body 1 to the aging furnace body 2; one end of the exhaust gas transmission pipeline is connected to the interior of the aging furnace body 2 and a smoke exhaust fan 6 is arranged in the exhaust gas transmission pipeline to discharge the waste heat in the aging furnace body 2.

[0022] Furthermore, the solid solution furnace body 1 is a continuous solid solution furnace, the aging furnace body 2 is a continuous aging furnace, and the solid solution furnace body 1 and the aging furnace body 2 are divided into multiple temperature zones according to the workpiece transmission direction; the waste heat transfer pipeline includes a waste heat transfer main pipe 7 and a waste heat export branch pipe 8 and a waste heat import branch pipe 9 distributed and connected to the side of the waste heat transfer main pipe 7, wherein the pressurized fan 5 is arranged in the waste heat transfer main pipe 7, and the other end of the waste heat export branch pipe 8 is respectively connected to the waste heat outlet of a temperature zone of the solid solution furnace body 1, and the other end of the waste heat import branch pipe 9 is respectively connected to the waste heat inlet of a temperature zone of the aging furnace body 2.

[0023] The waste heat in the solid solution furnace body 1 is concentrated on the waste heat transfer main pipe 7 through multiple waste heat export branch pipes 8, increasing the uniformity of waste heat absorption in the solid solution furnace body 1, and is transmitted to each temperature zone in the aging furnace body 2 through the waste heat introduction branch pipe 9 under the action of the pressurized fan 5.

[0024] The gas inlet 4 is provided with a gas burner, and the waste heat inlet is provided with a waste heat nozzle 10 to inject the gas or waste heat gas into the solid solution furnace body 1 or the aging furnace body 2 .

[0025] Furthermore, a circulating fan 11 is arranged at the top of each temperature zone, and the gas burner and the waste heat nozzle 10 are located below the circulating fan 11. The circulating fan 11 forms a circulating airflow from the top to the bottom of the gas or waste heat gas, which is evenly dispersed in the entire temperature zone, thereby achieving heating of the workpiece and preventing the flame generated by the gas from directly acting on the workpiece.

[0026] Furthermore, each of the waste heat introduction branch pipes 9 is provided with a gas flow valve 12, and the heating gas flowing into each temperature zone of the aging furnace body 2 is controlled by adjusting the gas flow valve 12, so as to realize the regulation of the temperature of each temperature zone. Each temperature zone is provided with a temperature sensor, which can sense the temperature in each temperature zone and feed back to the control center; the gas flow valve 12 is also electrically connected to the control center, so that the gas flow valve 12 can realize the opening and closing of the waste heat introduction branch pipe 9 according to the signal sent by the control center.

[0027] Furthermore, the surfaces of the waste heat transfer main pipe 7, the waste heat outlet branch pipe 8 and the waste heat inlet branch pipe 9 are all wrapped with a thermal insulation layer to reduce the loss of waste heat during the transmission process.

[0028] In addition, each temperature zone in the continuous aging furnace often needs to be divided into a heating zone and a heat preservation zone according to different temperature rise conditions. Therefore, in this embodiment, the waste heat inlet is arranged on the side of the aging furnace body 2, wherein waste heat introduction branch pipes 9 are arranged on both sides of the heating zone to increase the waste heat flowing into the heating zone; and for the heat preservation zone, only one side needs to be provided with a waste heat introduction branch pipe 9.

[0029] Similar to the waste heat transmission pipeline, the exhaust gas transmission pipeline also includes a smoke exhaust main pipe 13 and smoke exhaust branch pipes 14 distributed and connected to the sides of the smoke exhaust main pipe 13. The smoke exhaust fan 6 is arranged in the smoke exhaust main pipe 13. Each smoke exhaust branch pipe 14 is connected to the exhaust gas outlet of a temperature zone of the aging furnace body 2. The exhaust gas is discharged from each temperature zone in the aging furnace body 2 respectively, and is gathered to the smoke exhaust main pipe 13 under the action of the smoke exhaust fan 6 for centralized discharge.

[0030] Furthermore, the smoke exhaust branch pipe 14 is arranged on the top of the aging furnace body 2 .

[0031] Furthermore, the end of the waste heat transfer main pipe 7 is connected to the exhaust main pipe 13, and a pressure limiting valve 15 is provided at the end of the waste heat transfer main pipe 7. The function of the pressure limiting valve 15 is to regulate the gas pressure in the waste heat transfer main pipe 7. Under normal conditions, the pressure limiting valve 15 is in a closed state. When the temperature sensor senses that the temperature in the temperature zone is too high, it will send a closing command to the gas flow valve 12 to disconnect or limit the input of the waste heat gas into the aging furnace body 2, thereby causing a large amount of waste heat gas to accumulate in the waste heat transfer main pipe 7. At this time, the pressure limiting valve 15 is opened, and the accumulated waste heat gas is discharged from the exhaust main pipe 13.

[0032] Furthermore, a quenching station 16 is provided between the solution furnace body 1 and the aging furnace body 2, and the product after solution treatment is quenched and then aged, thereby forming a complete heat treatment production line.

[0033] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A heat treatment production line for effectively utilizing waste heat, comprising a solid solution furnace body (1) and an aging furnace body (2) arranged in a heat treatment sequence, a transition roller (3) for transmitting alloy is arranged between the discharge port of the solid solution furnace body (1) and the feed port of the aging furnace body (2), and a gas inlet (4) connected to an external gas device is arranged on the solid solution furnace body (1); characterized in that: A waste heat transmission pipeline and an exhaust gas transmission pipeline are also provided, wherein the waste heat transmission pipeline is connected to the interior of the solution furnace body (1) and the aging furnace body (2) respectively; one end of the exhaust gas transmission pipeline is connected to the interior of the aging furnace body (2).

2. A heat treatment production line for effectively utilizing waste heat as claimed in claim 1, characterized in that: A pressurizing fan (5) is arranged in the waste heat transmission pipeline, and a smoke exhaust fan (6) is arranged in the transmission pipeline.

3. A heat treatment production line for effectively utilizing waste heat as claimed in claim 2, characterized in that: The solid solution furnace body (1) is a continuous solid solution furnace, and the aging furnace body (2) is a continuous aging furnace. The solid solution furnace body (1) and the aging furnace body (2) are divided into a plurality of temperature zones according to the workpiece transmission direction.

4. A heat treatment production line for effectively utilizing waste heat as claimed in claim 3, characterized in that: The waste heat transfer pipeline comprises a waste heat transfer main pipe (7) and a waste heat outlet branch pipe (8) and a waste heat inlet branch pipe (9) which are distributed and connected to the side of the waste heat transfer main pipe (7); the pressurized fan (5) is arranged in the waste heat transfer main pipe (7), the other end of the waste heat outlet branch pipe (8) is respectively connected to the waste heat outlet of a temperature zone of the solid solution furnace body (1), and the other end of the waste heat inlet branch pipe (9) is respectively connected to the waste heat inlet of a temperature zone of the aging furnace body (2).

5. A heat treatment production line for effectively utilizing waste heat as claimed in claim 4, characterized in that: The surfaces of the waste heat transfer main pipe (7), the waste heat outlet branch pipe (8) and the waste heat inlet branch pipe (9) are all wrapped with a thermal insulation layer.

6. A heat treatment production line for effectively utilizing waste heat as claimed in claim 4, characterized in that: The exhaust gas transmission pipeline also includes an exhaust main pipe (13) and exhaust branch pipes (14) distributed and connected to the sides of the exhaust main pipe (13). The exhaust fan (6) is arranged in the exhaust main pipe (13). Each exhaust branch pipe (14) is connected to the exhaust gas outlet of a temperature zone of the aging furnace body (2).

7. A heat treatment production line for effectively utilizing waste heat as claimed in claim 4, characterized in that: A gas flow valve (12) is provided on each of the waste heat introduction branches (9), and the control center transmits a switch signal to the gas flow valve (12) according to the temperature signal fed back from each temperature zone.

8. A heat treatment production line for effectively utilizing waste heat as claimed in claim 6, characterized in that: The end of the waste heat transfer main pipe (7) is connected to the smoke exhaust main pipe (13), and a pressure limiting valve (15) is arranged at the end of the waste heat transfer main pipe (7).

9. A heat treatment production line for effectively utilizing waste heat as claimed in claim 3, characterized in that: A circulation fan (11) is arranged at the top of each temperature zone.

10. A heat treatment production line for effectively utilizing waste heat as claimed in claim 3, characterized in that: A quenching station (16) is also provided between the solution furnace body (1) and the aging furnace body (2).

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