CN210862260U - Flue gas waste heat recovery and circulation system of annealing furnace - Google Patents
Flue gas waste heat recovery and circulation system of annealing furnace Download PDFInfo
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- CN210862260U CN210862260U CN201921401550.9U CN201921401550U CN210862260U CN 210862260 U CN210862260 U CN 210862260U CN 201921401550 U CN201921401550 U CN 201921401550U CN 210862260 U CN210862260 U CN 210862260U
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Abstract
The utility model relates to an annealing stove production field specifically provides an annealing stove flue gas waste heat recovery circulation system. A high-temperature flue gas outlet of the annealing furnace is connected with a high-temperature flue gas inlet of the heat exchanger through a flue gas exhaust pipeline, a high-temperature flue gas valve is connected in series with the flue gas exhaust pipeline at the front end of the high-temperature flue gas inlet, and a low-temperature flue gas outlet of the heat exchanger is connected with an evacuation pipeline; a low-temperature air inlet of the heat exchanger is connected with a fresh air inlet pipeline, a high-temperature air outlet of the heat exchanger is connected with an air inlet of the annealing furnace through a high-temperature air pipeline, and a high-temperature air valve is arranged on the high-temperature air pipeline; an air inlet bypass and a bypass valve are arranged at the air inlet of the annealing furnace. Compared with the prior art, the novel waste heat recovery circulation system can recover waste heat of high-temperature flue gas discharged in the annealing production process, heat normal-temperature fresh air, timely supplement furnace gas according to the technological requirements of the annealing furnace, save annealing energy consumption and solve the problems of waste of high-temperature flue gas heat energy and thermal pollution of the aluminum foil annealing furnace.
Description
Technical Field
The utility model relates to an annealing stove production field specifically provides an annealing stove flue gas waste heat recovery circulation system.
Background
Rolling oil (mainly comprising light kerosene) is used as a lubricating cleaning agent in the rolling production process of the aluminum foil, the oil quantity of the obtained semi-finished aluminum foil is 50 mg/square meter, most of the semi-finished aluminum foil needs to be treated by an annealing process, and the rolling oil is evaporated completely by high-temperature furnace gas (the oil removal rate is more than 95 percent) and the mechanical property is adjusted to obtain the aluminum foil finished product which can be used in the downstream production link. In order to meet the requirements of the aluminum foil annealing process, the production process of the aluminum foil annealing furnace is required to gradually raise the temperature of furnace gas from normal temperature to 200-320 ℃ and keep the temperature for a long time according to the control requirements of the annealing process, and the average temperature of high-temperature flue gas discharged in the annealing process is between 180 ℃ and 300 ℃.
The oil content of the fume in the annealing furnace must be strictly controlled at 500mg/m in the annealing process of the aluminum foil3In order to prevent the problems of yellowing, black spots, incomplete oil removal and the like on the surface of a product and the potential safety hazard caused by high-concentration oil gas, the smoke must be discharged periodically in the annealing process (the smoke discharge amount of a single aluminum foil annealing furnace is not less than 1000 m)3And/h), and simultaneously periodically supplementing fresh air (normal-temperature air, short for: fresh air) to dilute the oil content of furnace gas in the hearth, and the supplemented fresh air volume is not less than 1000m3/h。
On one hand, the aluminum foil annealing process is long (24-300h), the smoke exhaust time is long, the smoke exhaust temperature is 150-300 ℃, the smoke amount is large, the heat brought away by smoke exhaust is large, the energy consumption is large, and the thermal pollution is serious. On the other hand, each process time interval of aluminum foil annealing has strict process control requirements on the supplemented fresh air, the excessive supplemented fresh air can cause unstable furnace pressure, reduced furnace temperature and increased furnace gas heating energy consumption, and the less supplemented fresh air can cause higher oil content of flue gas, yellowing, oil stain and incomplete oil removal on the surface of the aluminum foil, and the problem of potential safety production hazard can be caused in serious cases.
Disclosure of Invention
The utility model provides an annealing furnace flue gas waste heat recovery circulation system aiming at the defects of the prior art. The system can recover waste heat of high-temperature flue gas discharged in the annealing production process, heat normal-temperature fresh air, automatically run according to the requirements of the aluminum foil annealing process, save annealing energy consumption and solve the problems of waste of high-temperature flue gas heat energy and thermal pollution of the aluminum foil annealing furnace.
The utility model provides a technical scheme that its technical problem adopted is: a flue gas waste heat recovery and circulation system of an annealing furnace comprises the annealing furnace and a heat exchanger, wherein a high-temperature flue gas outlet of the annealing furnace is connected with a high-temperature flue gas inlet of the heat exchanger through a smoke exhaust pipeline, the front end of the high-temperature flue gas inlet is connected with a high-temperature flue gas valve in series, and a low-temperature flue gas outlet of the heat exchanger is connected with an evacuation pipeline;
a low-temperature air inlet of the heat exchanger is connected with a fresh air inlet pipeline, a high-temperature air outlet of the heat exchanger is connected with an air inlet of the annealing furnace through a high-temperature air pipeline, and a high-temperature air valve is arranged on the high-temperature air pipeline;
an air inlet bypass is arranged at an air inlet of the annealing furnace, and a bypass valve is arranged on the air inlet bypass;
sensors are arranged at a high-temperature flue gas inlet and a high-temperature air outlet of the heat exchanger;
the high-temperature flue gas valve, the high-temperature air valve, the bypass valve and the sensor are in signal connection with the control system.
In the utility model, the number of the annealing furnaces can be 1, and can also be 2 or more than 2. When the number of the annealing furnaces is 2 or more than 2, preferably, the smoke exhaust pipeline is composed of smoke exhaust branch pipes and a smoke exhaust main pipe, high-temperature smoke outlets of at least two annealing furnaces are respectively connected with the smoke exhaust main pipe through the smoke exhaust branch pipes, the smoke exhaust main pipe is connected with a high-temperature smoke inlet of the heat exchanger, a high-temperature smoke valve is arranged on the smoke exhaust main pipe, and/or a high-temperature smoke sub-control valve is arranged on the smoke exhaust branch pipes; the high-temperature air pipe is composed of high-temperature air branch pipes and a high-temperature air main pipe, the air inlet of each annealing furnace is connected with the high-temperature air main pipe through the high-temperature air branch pipes respectively, the high-temperature air main pipe is connected with a high-temperature gas outlet of the heat exchanger, a high-temperature air valve is arranged on the high-temperature air main pipe, and/or a high-temperature air sub-control valve is arranged on the high-temperature air branch pipes.
In order to more accurately control the temperature in the annealing furnace, sensors can be arranged at a low-temperature flue gas outlet and a low-temperature air inlet of the fresh air heat exchanger, and the sensors are in signal connection with a control system.
The sensor is preferably a gas temperature sensor and/or a gas flow sensor for monitoring gas temperature and/or gas flow data in real time.
Preferably, a direct exhaust bypass can be arranged between the smoke exhaust pipeline and the emptying pipeline, a direct exhaust valve is arranged on the direct exhaust bypass, and normal production can not be influenced when the heat exchanger is overhauled and maintained.
The direct vent valve can be independently arranged, and can also be designed into a three-way valve together with a high-temperature flue gas valve.
Preferably, the emptying pipeline is connected with a low-temperature flue gas valve in series, the fresh air inlet pipeline is provided with a fresh air inlet valve, and the fresh air inlet valve is in signal connection with the controller.
In order to overcome the pressure loss generated by a longer pipeline, a smoke exhaust fan can be connected in series on a high-temperature smoke outlet, a smoke exhaust pipeline and/or an emptying pipeline of the annealing furnace, an air inlet fan is connected in series at a fresh air inlet pipeline, a high-temperature air pipeline and/or an air inlet of the annealing furnace, and the smoke exhaust fan and the air inlet fan are in signal connection with a controller.
Preferably, the heat exchanger is provided with a sewage draining outlet, and a sewage draining valve is assembled at the sewage draining outlet.
The controller of the utility model can be the original controller of the annealing furnace, and all the valves and the fans are controlled by the annealing furnace controller according to the sensor data and the process requirements; or an independent controller, which controls the annealing furnace according to the sensor data and the annealing furnace signal.
Compared with the prior art, the utility model discloses an annealing stove flue gas waste heat recovery circulation system has following outstanding beneficial effect:
the heat energy recovery can be carried out on the high-temperature flue gas to heat the normal-temperature fresh air, so that the temperature of the fresh air is increased, a considerable energy-saving effect and economic value are achieved, and the problem of heat pollution is reduced;
after the fresh air is preheated by the heat exchanger, the temperature can be increased from 50 ℃ to 100 ℃, and then the fresh air is supplemented into a circulating pipeline of the aluminum foil annealing furnace, so that the maximum power output of a heater of the annealing furnace can be obviously reduced, and the power consumption of the aluminum foil annealing furnace in production is reduced;
and (III) temperature and flow sensors are arranged at the heat exchanger for data collection, and the temperature control of smoke discharge and fresh air is controlled by matching with a smoke discharge fan and an air inlet fan, so that the accurate control of fresh air supplement in each process period of aluminum foil annealing can be realized, and the problems of unstable furnace pressure, reduced furnace temperature, higher oil concentration of smoke, yellowing of the surface of the aluminum foil, oil spots, incomplete oil removal and the like are avoided.
Drawings
FIG. 1 is a schematic structural diagram of a flue gas waste heat recovery and circulation system of an annealing furnace in an embodiment;
FIG. 2 is a schematic structural diagram of a flue gas waste heat recovery circulation system of an annealing furnace in the second embodiment;
FIG. 3 is a schematic structural diagram of a flue gas waste heat recovery circulation system of a third annealing furnace of the embodiment;
FIG. 4 is a schematic perspective view of the circulation system of FIG. 3;
FIG. 5 is an enlarged schematic view of the circulation system A of FIG. 4;
FIG. 6 is a schematic structural diagram of a flue gas waste heat recovery circulation system of a fourth annealing furnace in the embodiment;
FIG. 7 is a schematic perspective view of the circulation system of FIG. 6;
FIG. 8 is an enlarged schematic view of the circulation system B shown in FIG. 7.
The reference numerals in the drawings denote:
1. an annealing furnace, 2, a heat exchanger, 2.1, a high-temperature flue gas inlet, 2.2, a low-temperature flue gas outlet, 2.3, a low-temperature air inlet, 2.4, a high-temperature air outlet, 3.1, a first smoke exhaust fan, 3.2, a second smoke exhaust fan, 4, a smoke exhaust pipeline, 4.1, a smoke exhaust branch pipe, 4.2, a smoke exhaust main pipe, 5, a high-temperature flue gas valve, 5.1, a high-temperature flue gas branch control valve, 6, an exhaust pipeline, 7, a straight exhaust bypass, 8, a straight exhaust valve, 9, a fresh air inlet valve, 10, an air inlet fan, 11, a high-temperature air pipeline, 11.1, a high-temperature air branch pipe, 11.2, a high-temperature air main pipe, 12, an air inlet, 13, a high-temperature air valve, 13.1, a high-temperature air branch control valve, 14, an air inlet bypass, 15, a bypass valve, 16, a fresh air inlet pipeline, 17, a heating assembly, 18, 22. temperature sensor, 23, flow sensor.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific examples, which are not intended to limit the present invention.
In the present invention, unless otherwise specified, the use of directional terms such as "upper, lower, left, and right" generally means upper, lower, left, and right as illustrated with reference to the accompanying drawings; "inner and outer" refer to the inner and outer relative to the profile of the components themselves.
The first embodiment is as follows:
as shown in fig. 1, the annealing furnace flue gas waste heat recovery circulation system of the present embodiment is mainly composed of an annealing furnace 1, a heat exchanger 2 and a controller, wherein the annealing furnace 1 is a built-in fan annealing furnace.
A first smoke exhaust fan 3.1 is installed at a high-temperature smoke outlet of the annealing furnace 1, the first smoke exhaust fan 3.1 is connected with a high-temperature smoke inlet 2.1 of the heat exchanger 2 through a smoke exhaust pipeline 4, and a high-temperature smoke valve 5 is connected to the smoke exhaust pipeline 4 at the front end of the high-temperature smoke inlet 2.1 in series. The low-temperature flue gas outlet 2.2 of the heat exchanger 2 is connected with an emptying pipeline 6. The evacuation line 6 is equipped with a second smoke exhaust fan 3.2. An in-line bypass 7 is fitted between the exhaust line 4 and the evacuation line 6. The direct vent bypass 7 is equipped with a direct vent valve 8.
The low-temperature air inlet 2.3 of the heat exchanger 2 is connected with a fresh air inlet pipeline 16. The fresh air inlet pipeline 16 is provided with a fresh air inlet valve 9 and is connected with an air inlet fan 10. The high-temperature air outlet 2.4 of the heat exchanger 2 is connected with an air inlet 12 of the annealing furnace 1 through a high-temperature air pipeline 11, and a high-temperature air valve 13 is assembled on the high-temperature air pipeline 11. An inlet bypass 14 is also connected to the inlet 12 of the annealing furnace 1. A bypass valve 15 is mounted on the intake bypass 14. A sewage discharge port and an access hole are installed at the lower end of the shell of the heat exchanger 2, and a manual ball valve 19 is assembled at the sewage discharge port.
The first exhaust fan 3.1, the second exhaust fan 3.2, the air inlet fan 10, the high-temperature flue gas valve 5, the fresh air inlet valve 9, the high-temperature air valve 13, the bypass valve 15, the temperature sensors 22 and the flow sensor 23 are in signal connection with the controller.
The controller can be an original controller of the annealing furnace, and all the valves and the fans are controlled by the annealing furnace controller according to the sensor data and the process requirements; or an independent controller, which controls the annealing furnace according to the sensor data and the annealing furnace signal. When an independent controller is adopted, any programmable controller can be selected, such as a Siemens S1200 series, a Honeyville RTU2020 series and other PLCs.
Annealing process temperature rising section of aluminum foil annealing furnace:
the temperature rising section needs to absorb a large amount of heat, and the volatilization amount of oil gas is large. The bypass valve 15 for supplementing normal temperature air is closed, the high temperature flue gas valve 5 at the front end of the heat exchanger 2 is opened, the direct vent valve 8 keeps a closed state, and the first smoke exhaust fan 3.1 and the second smoke exhaust fan 3.2 continuously work. The oily high-temperature air of the smoke exhaust pipeline 4 transfers heat to the low-temperature air through the heat exchanger 2, and then is exhausted through the outdoor atmosphere of the evacuation pipeline 6, and two temperature sensors of a high-temperature smoke inlet 2.1 and a low-temperature smoke outlet 2.2 of the heat exchanger 2 are used for monitoring the temperature before and after heat exchange of the main smoke exhaust pipeline. Meanwhile, because the oil gas volatilization volume is large, fresh air is needed to be supplemented to continuously dilute the oil-containing air in the annealing temperature rising section, the high-temperature air valve 13 on the high-temperature air pipeline 11 is opened with corresponding opening according to the requirement of the aluminum foil annealing process, the fresh air enters the heat exchanger 2 from the outdoor through the fresh air inlet pipeline 16 for heat exchange, the thermocouple can detect the air temperature after heat exchange after the heat exchange is completed, the air temperature is fed back to the controller (PLC), and then the maximum power output of the heater of the annealing furnace 1 is limited, so that the temperature of the hot air circulating in the annealing furnace in the temperature rising section is controlled to be in the required.
Annealing process heat preservation section of aluminum foil annealing furnace:
the valve control of the waste heat utilization pipeline system of the heat preservation section is the same as that of the temperature rising section.
And (3) annealing process cooling section of the aluminum foil annealing furnace:
the aluminum foil entering the cooling section needs cooling treatment, at the moment, the furnace gas needs to take away heat through smoke exhaust, normal temperature air is supplemented timely, and hot air after heat exchange does not need to be supplemented, so that the controller (PLC) closes the high temperature air valve 13, and simultaneously controls the bypass valve 15 to open corresponding opening according to the process requirement of furnace gas cooling.
And finishing the annealing process of the aluminum foil annealing furnace:
after the aluminum foil annealing production is finished, the controller (PLC) controls the high-temperature air valve 13, the bypass valve 15 and the high-temperature flue gas valve 5 to be closed, and the cooling of the hearth and the flue gas of the flue gas exhaust pipeline 4 are prevented from flowing back to enter the hearth.
When the heat exchanger 2 needs to be maintained or overhauled, the high-temperature flue gas valve 5 of the heat exchanger is closed, the direct vent valve 8 is opened, the aluminum foil annealing furnace 1 can be normally produced, and the maintenance or overhaul of the heat exchanger 2 is not influenced.
Example two:
as shown in fig. 2, the annealing furnace flue gas waste heat recovery circulation system of the present embodiment is mainly composed of an annealing furnace 1, a heat exchanger 2 and a controller.
The annealing furnace 1, the heat exchanger 2 and the controller have the same structure and connection relationship as those of the first embodiment, except that the annealing furnace 1 is an external heating annealing furnace, the heating assembly 17 of the annealing furnace and the heating assembly fan 18 connected with the heating assembly 17 are arranged outside the shell. The high-temperature air pipeline 11 and the air inlet bypass 14 are both connected with an air inlet 12 of a heating assembly fan 18.
Example three:
as shown in fig. 3, 4 and 5, the annealing furnace flue gas waste heat recovery circulation system of the embodiment mainly comprises three annealing furnaces 1, a heat exchanger 2 and a controller, wherein the annealing furnace 1 is a built-in fan annealing furnace.
The high-temperature flue gas outlets of the three annealing furnaces 1 are provided with first smoke exhaust fans 3.1, and the first smoke exhaust fans 3.1 are respectively connected with a smoke exhaust main pipe 4.2 through smoke exhaust branch pipes 4.1. The smoke exhaust main pipe 4.2 is connected with a high-temperature smoke inlet 2.1 of the heat exchanger 2. The branch smoke exhaust pipes 4.1 and the main smoke exhaust pipe 4.2 are respectively provided with a high-temperature smoke branch control valve 5.1 and a high-temperature smoke valve 5. A low-temperature flue gas valve 21 is arranged at a low-temperature flue gas outlet 2.2 of the heat exchanger 2 and is connected with an evacuation pipeline 6. The evacuation line 6 is equipped with a second fume extractor 3.2. An in-line bypass 7 is arranged between the main exhaust pipe 4.2 and the evacuation line 6. The direct vent bypass 7 is equipped with a direct vent valve 8.
The air inlet 12 of the annealing furnace 1 is connected with a high-temperature air main pipe 11.2 through a high-temperature air branch pipe 11.1. The high-temperature air main pipe 11.2 is connected with a high-temperature gas outlet 2.4 of the heat exchanger 2. Each high-temperature air branch pipe 11.1 is provided with a high-temperature air branch control valve 13.1 and a high-temperature air fan 20. An inlet bypass 14 is also connected to the inlet 12 of the annealing furnace 1. A bypass valve 15 is mounted on the intake bypass 14. The low-temperature air inlet 2.3 of the heat exchanger 2 is used for receiving a fresh air inlet pipeline.
A sewage discharge port and an access hole are installed at the lower end of the shell of the heat exchanger 2, and a manual ball valve 19 is assembled at the sewage discharge port.
The first smoke exhaust fan 3.1, the second smoke exhaust fan 3.2, the high-temperature air fan 20, the high-temperature smoke valve 5, the high-temperature smoke sub-control valve 5.1, the direct vent valve 8, the high-temperature air valve 13, the bypass valve 15, the temperature sensor 22 and the flow sensor 23 are in signal connection with the controller.
The controller can be an original controller of the annealing furnace, and all the valves and the fans are controlled by the annealing furnace controller according to the sensor data and the process requirements; or an independent controller, which controls the annealing furnace according to the sensor data and the annealing furnace signal. When an independent controller is adopted, any programmable controller can be selected, such as a Siemens S1200 series, a Honeyville RTU2020 series and other PLCs.
The control process of each process stage of the circulating system of the embodiment is basically the same as that of the embodiment, but the process stages of each annealing furnace at the same time are different, and each annealing furnace discharges high-temperature flue gas into the high-temperature flue gas header pipe 4.2 at different time intervals for providing a heat source for low-temperature air for other annealing furnaces to use, so that the maximum recycling of heat can be realized.
Example four:
as shown in fig. 6, 7 and 8, the annealing furnace flue gas waste heat recovery circulation system of the present embodiment is mainly composed of four annealing furnaces 1, a heat exchanger 2 and a controller.
The annealing furnace 1, the heat exchanger 2 and the controller have the same structure and connection relationship as those of the first embodiment, except that the annealing furnace 1 is an external heating annealing furnace, the heating assembly 17 of the annealing furnace and the heating assembly fan 18 connected with the heating assembly 17 are arranged outside the shell. The high-temperature air branch pipe 11.1 and the air inlet bypass 14 are connected with an air inlet 12 of a heating assembly fan 18.
The above-mentioned embodiments are only preferred embodiments of the present invention, and the ordinary changes and substitutions performed by those skilled in the art within the technical scope of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides an annealing stove flue gas waste heat recovery circulation system, includes annealing stove (1), heat exchanger (2), its characterized in that:
a high-temperature flue gas outlet of the annealing furnace (1) is connected with a high-temperature flue gas inlet (2.1) of the heat exchanger (2) through a flue gas exhaust pipeline (4), the front end of the high-temperature flue gas inlet (2.1) is connected with a high-temperature flue gas valve (5) in series, and a low-temperature flue gas outlet (2.2) of the heat exchanger (2) is connected with an evacuation pipeline (6);
a low-temperature air inlet (2.3) of the heat exchanger (2) is connected with a fresh air inlet pipeline (16), a high-temperature air outlet (2.4) of the heat exchanger (2) is connected with an air inlet (12) of the annealing furnace (1) through a high-temperature air pipeline (11), and a high-temperature air valve (13) is arranged on the high-temperature air pipeline (11);
an air inlet bypass (14) is arranged at the air inlet (12) of the annealing furnace, and a bypass valve (15) is arranged on the air inlet bypass;
sensors are arranged at a high-temperature flue gas inlet (2.1) and a high-temperature air outlet (2.4) of the heat exchanger (2);
the high-temperature flue gas valve (5), the high-temperature air valve (13), the bypass valve (15) and the sensor are in signal connection with the controller.
2. The flue gas waste heat recovery and circulation system of the annealing furnace according to claim 1, wherein the smoke exhaust pipeline (4) is composed of smoke exhaust branch pipes (4.1) and a smoke exhaust main pipe (4.2), high-temperature flue gas outlets of at least two annealing furnaces (1) are respectively connected with the smoke exhaust main pipe (4.2) through the smoke exhaust branch pipes (4.1), the smoke exhaust main pipe (4.2) is connected with a high-temperature flue gas inlet (2.1) of the heat exchanger (2), the smoke exhaust main pipe (4.2) is provided with a high-temperature flue gas valve (5), and/or the smoke exhaust branch pipes (4.1) are provided with a high-temperature flue gas sub-control valve (5.1);
the high-temperature air pipeline (11) is composed of high-temperature air branch pipes (11.1) and a high-temperature air main pipe (11.2), an air inlet (12) of each annealing furnace is connected with the high-temperature air main pipe (11.2) through the high-temperature air branch pipes (11.1), the high-temperature air main pipe (11.2) is connected with a high-temperature gas outlet (2.4) of the heat exchanger (2), a high-temperature air valve (13) is arranged on the high-temperature air main pipe (11.2), and/or a high-temperature air sub-control valve (13.1) is arranged on the high-temperature air branch pipes (11.1).
3. The flue gas waste heat recovery and circulating system of the annealing furnace according to claim 1 or 2, wherein sensors are arranged at the low-temperature flue gas outlet (2.2) and the low-temperature air inlet (2.3) of the heat exchanger (2), and the sensors are in signal connection with a controller.
4. The annealing furnace flue gas waste heat recovery and circulating system according to claim 3, wherein the sensor is a gas temperature sensor and/or a gas flow sensor.
5. The annealing furnace flue gas waste heat recovery and circulating system according to claim 1 or 2, characterized in that a direct exhaust bypass (7) is arranged between the smoke exhaust pipeline (4) and the evacuation pipeline (6), and a direct exhaust valve (8) is arranged on the direct exhaust bypass (7).
6. The annealing furnace flue gas waste heat recovery and circulating system of claim 1 or 2, wherein a fresh air inlet valve (9) is arranged on the fresh air inlet pipeline, and the fresh air inlet valve (9) is in signal connection with a controller.
7. The annealing furnace flue gas waste heat recovery and circulation system according to claim 1 or 2, characterized in that a smoke exhaust fan is connected in series with the high-temperature flue gas outlet of the annealing furnace (1), the smoke exhaust pipeline (4) and/or the evacuation pipeline (6), and the smoke exhaust fan is in signal connection with the controller.
8. The flue gas waste heat recovery and circulating system of the annealing furnace as claimed in claim 1 or 2, wherein the fresh air inlet pipeline (16), the high temperature air pipeline (11) and/or the annealing furnace inlet (12) are connected in series with an air inlet fan, and the air inlet fan is in signal connection with a controller.
9. The annealing furnace flue gas waste heat recovery and circulating system according to claim 1 or 2, characterized in that the heat exchanger (2) is provided with a drain outlet, and the drain outlet is equipped with a drain valve (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201921401550.9U CN210862260U (en) | 2019-08-27 | 2019-08-27 | Flue gas waste heat recovery and circulation system of annealing furnace |
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| CN201921401550.9U CN210862260U (en) | 2019-08-27 | 2019-08-27 | Flue gas waste heat recovery and circulation system of annealing furnace |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113275397A (en) * | 2021-03-30 | 2021-08-20 | 桐乡市永成线缆有限公司 | Copper wire drawing process |
| CN114717402A (en) * | 2022-04-06 | 2022-07-08 | 江苏中基复合材料有限公司 | Annealing stove waste heat utilization and air purification system |
| CN114752752A (en) * | 2022-04-28 | 2022-07-15 | 江西中臻通讯科技有限公司 | Annealing furnace for phosphor bronze alloy wire annealing production process |
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2019
- 2019-08-27 CN CN201921401550.9U patent/CN210862260U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113275397A (en) * | 2021-03-30 | 2021-08-20 | 桐乡市永成线缆有限公司 | Copper wire drawing process |
| CN113275397B (en) * | 2021-03-30 | 2022-07-29 | 桐乡市永成线缆有限公司 | Copper wire drawing process |
| CN114717402A (en) * | 2022-04-06 | 2022-07-08 | 江苏中基复合材料有限公司 | Annealing stove waste heat utilization and air purification system |
| CN114717402B (en) * | 2022-04-06 | 2024-06-11 | 江苏中基新能源科技集团有限公司 | Annealing furnace waste heat utilization and air purification system |
| CN114752752A (en) * | 2022-04-28 | 2022-07-15 | 江西中臻通讯科技有限公司 | Annealing furnace for phosphor bronze alloy wire annealing production process |
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