CN111578701A - Bell jar furnace nitrogen purification and cyclic utilization device and process - Google Patents
Bell jar furnace nitrogen purification and cyclic utilization device and process Download PDFInfo
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- CN111578701A CN111578701A CN202010460119.2A CN202010460119A CN111578701A CN 111578701 A CN111578701 A CN 111578701A CN 202010460119 A CN202010460119 A CN 202010460119A CN 111578701 A CN111578701 A CN 111578701A
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- furnace
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B11/00—Bell-type furnaces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D7/00—Forming, maintaining, or circulating atmospheres in heating chambers
- F27D7/02—Supplying steam, vapour, gases, or liquids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
Abstract
The invention provides a nitrogen purification and cyclic utilization device of a bell jar furnace, which comprises the bell jar furnace, a gas purification device and a gas storage tank, wherein the bell jar furnace is connected with the gas purification device; the bell jar furnace comprises a heating cover and a plurality of furnace seats, and each furnace seat is provided with a furnace pipe; the furnace pipe comprises a first furnace pipe, a second furnace pipe and a third furnace pipe; the heating covers can be respectively arranged outside the first furnace pipe, the second furnace pipe and the third furnace pipe; the input ends of the first furnace pipe, the second furnace pipe and the third furnace pipe are respectively connected with a first gas transmission pipeline; the output ends of the first furnace pipe, the second furnace pipe and the third furnace pipe are respectively connected with one end of a second gas transmission pipeline; the other end of the second gas transmission pipeline is connected with a gas purification device; the other end of the gas purification device is connected with a gas storage tank; the other end of the gas storage tank is connected with a third gas transmission pipeline; the output end of the third gas transmission pipeline is connected with the first gas transmission pipeline. The bell jar furnace nitrogen purification and cyclic utilization process is simple and convenient to operate, high in universality, capable of realizing automatic operation and capable of solving the problem of high nitrogen and energy consumption in the annealing process of the traditional bell jar furnace.
Description
Technical Field
The invention relates to the technical field of nonferrous metal processing, in particular to a bell jar furnace nitrogen purification and cyclic utilization device and a bell jar furnace nitrogen purification and cyclic utilization process.
Background
In the annealing process of the existing copper alloy coil, in order to overcome the oxidation of the copper alloy coil during annealing at 500-530 ℃ and obtain a uniform and clean outer surface, the copper alloy coil is generally annealed by using a bell-jar furnace, and in the annealing process, air is firstly pumped out, and then a certain amount of nitrogen is filled for protection. In the rolling or coiling process of the coil pipe in the cold working process, a certain amount of lubricant with high viscosity needs to be used between the pipe and the die, although the subsequent degreasing treatment is carried out, a certain amount of lubricant still remains, and a small amount of oil gas and carbon dust can be generated after the lubricant is heated in the annealing process of the coil pipe. In the annealing process or discharging process in the prior art, the used nitrogen containing oil gas and carbon dust in the hearth of the annealing furnace is directly discharged into the atmosphere, so that the nitrogen is greatly wasted, partial particles and heat are remained in the discharged tail gas, and the direct discharge can bring certain pollution to the atmospheric environment and the working environment.
Disclosure of Invention
The invention aims to overcome and supplement the defects in the prior art and provide a bell jar furnace nitrogen purification and cyclic utilization device and process. The technical scheme adopted by the invention is as follows:
a bell jar furnace nitrogen gas purification cyclic utilization device, wherein: comprises a bell jar furnace, a gas purification device and a gas storage tank; the bell-jar furnace comprises a heating cover and a plurality of furnace seats, and each furnace seat is provided with a furnace pipe; the furnace pipe comprises a first furnace pipe, a second furnace pipe and a third furnace pipe; the heating covers can be respectively arranged outside the first furnace pipe, the second furnace pipe and the third furnace pipe; the input ends of the first furnace pipe, the second furnace pipe and the third furnace pipe are respectively connected with a first gas transmission pipeline; the output ends of the first furnace pipe, the second furnace pipe and the third furnace pipe are respectively connected with a second gas transmission pipeline; the other end of the second gas transmission pipeline is connected with a gas purification device; the other end of the gas purification device is connected with a gas storage tank; the other end of the gas storage tank is connected with a third gas transmission pipeline; and the output end of the third gas transmission pipeline is connected with the first gas transmission pipeline.
Preferably, the nitrogen purification and recycling device for the bell jar furnace comprises: the gas purification device comprises a shell, wherein a ceramic filter plate is arranged at the upper part in the shell; and the middle part of the shell is provided with a gas purification component.
Preferably, the nitrogen purification and recycling device for the bell jar furnace comprises: a first valve is arranged on a first gas transmission pipeline at the input end of the first furnace pipe; a second valve is arranged on the first gas transmission pipeline at the input end of the second furnace pipe; and a third valve is arranged on the first gas transmission pipeline at the input end of the third furnace pipe.
Preferably, the nitrogen purification and recycling device for the bell jar furnace comprises: a fourth valve is arranged on the second gas transmission pipeline at the output end of the first furnace pipe; a fifth valve is arranged on a second gas transmission pipeline at the output end of the second furnace pipe; and a sixth valve is arranged on the second gas transmission pipeline at the output end of the third furnace pipe.
Preferably, the nitrogen purification and recycling device for the bell jar furnace comprises: a seventh valve is arranged on the second gas transmission pipeline close to the input end of the gas purification device; and an eighth valve is arranged on the third gas transmission pipeline.
Preferably, the nitrogen purification and recycling device for the bell jar furnace comprises: and pressure sensors are arranged in the first furnace pipe, the second furnace pipe and the third furnace pipe.
Preferably, the nitrogen purification and recycling device for the bell jar furnace comprises: the air storage tank is wrapped by a heat insulation material, and the thickness of the heat insulation material is 10-20 mm.
A bell jar furnace nitrogen purification cyclic utilization technology, wherein: the method comprises the following steps:
1) loading a coil to be annealed into a material frame, then loading the coil into a bell-jar furnace base, covering a first furnace pipe, a second furnace pipe or a third furnace pipe, sealing, vacuumizing, filling nitrogen until the pressure in the furnace pipes reaches 0.1-0.12 MPa, covering a heating cover, switching on cooling water and a power supply, and starting the power supply to anneal;
2) introducing nitrogen mixed gas containing oil gas and carbon dust in the first furnace pipe, the second furnace pipe or the third furnace pipe in the annealing process and after annealing into a gas purification device through a second gas transmission pipeline for purification to obtain clean nitrogen;
3) introducing the purified clean nitrogen into a gas storage tank for caching;
4) and (4) introducing the clean nitrogen cached in the gas storage tank into a second gas transmission pipeline through a third gas transmission pipeline for cyclic utilization.
Preferably, the bell jar furnace nitrogen gas purification recycling process comprises the following steps: before nitrogen is filled into the furnace pipe, the inner cavity of the furnace pipe is pumped into negative pressure of-0.1 to-0.08 MPa by a vacuum pump, and then the nitrogen is filled until the pressure in the furnace pipe reaches 0.1 to 0.12 MPa.
Preferably, the bell jar furnace nitrogen gas purification recycling process comprises the following steps: and 1) in the annealing process, automatically opening a seventh valve to exhaust when the pressure in the furnace pipe exceeds the set maximum pressure.
The invention has the advantages that:
the bell jar furnace nitrogen purification recycling process is simple and convenient to operate, high in universality and capable of realizing automatic operation and solving the problem of high nitrogen and energy consumption in the annealing process of the traditional bell jar furnace; the pollution to the environment is reduced through a nitrogen purification treatment system; meanwhile, the electromagnetic valve is automatically adjusted through a return signal of the pressure sensor, the upper limit of the pressure in the furnace pipe is automatically controlled and adjusted, the labor intensity of workers is reduced, the working environment is improved, and the occurrence of safety accidents is reduced.
Drawings
FIG. 1 is a structural diagram of a nitrogen gas purification recycling device of a bell jar furnace according to the present invention.
Detailed Description
The invention is further illustrated by the following specific figures and examples.
Example 1:
a bell jar furnace nitrogen gas purification cyclic utilization device, wherein: comprises a bell jar furnace, a gas purification device and a gas storage tank; the bell-jar furnace comprises a heating cover and a plurality of furnace seats, and each furnace seat is provided with a furnace pipe; the furnace pipe comprises a first furnace pipe 1, a second furnace pipe 2 and a third furnace pipe 3; the heating covers can be respectively arranged outside the first furnace pipe 1, the second furnace pipe 2 and the third furnace pipe 3; the input ends of the first furnace pipe 1, the second furnace pipe 2 and the third furnace pipe 3 are respectively connected with a first gas transmission pipeline 4; the output ends of the first furnace pipe 1, the second furnace pipe 2 and the third furnace pipe 3 are respectively connected with a second gas transmission pipeline 5; the other end of the second gas transmission pipeline 5 is connected with a gas purification device 6; the other end of the gas purification device 6 is connected with a gas storage tank 7; the other end of the gas storage tank 7 is connected with a third gas transmission pipeline 8; the output end of the third gas transmission pipeline 8 is connected with the first gas transmission pipeline 4.
Wherein: the gas purification device 6 comprises a shell, wherein a ceramic filter plate is arranged at the upper part in the shell; and the middle part of the shell is provided with a gas purification component.
Wherein: a first valve 9 is arranged on a first gas transmission pipeline at the input end of the first furnace pipe 1; a second valve 10 is arranged on the first gas transmission pipeline at the input end of the second furnace pipe 2; a third valve 11 is arranged on the first gas transmission pipeline at the input end of the third furnace pipe 3.
Wherein: a fourth valve 12 is arranged on the second gas transmission pipeline 5 at the output end of the first furnace pipe 1; a fifth valve 13 is arranged on the second gas transmission pipeline 5 at the output end of the second furnace pipe 2; a sixth valve 14 is arranged on the second gas transmission pipeline 5 at the output end of the third furnace pipe 2.
Wherein: a seventh valve 15 is arranged on the second gas transmission pipeline 5 close to the input end of the gas purification device 6; an eighth valve 16 is arranged on the third gas transmission pipeline 8.
Wherein: and pressure sensors are arranged in the first furnace pipe 1, the second furnace pipe 2 and the third furnace pipe 3.
Wherein: the air storage tank 7 is wrapped by a heat insulation material, and the thickness of the heat insulation material is 10-20 mm.
Example 2:
a bell jar furnace nitrogen purification cyclic utilization technology, wherein: the method comprises the following steps:
1) loading a coil to be annealed into a material frame, then loading the coil into a bell-jar furnace base, covering a first furnace pipe, a second furnace pipe or a third furnace pipe, sealing, vacuumizing, filling nitrogen until the pressure in the furnace pipes reaches 0.1-0.12 MPa, covering a heating cover, switching on cooling water and a power supply, and starting the power supply to anneal;
2) introducing nitrogen mixed gas containing oil gas and carbon dust in the first furnace pipe, the second furnace pipe or the third furnace pipe in the annealing process and after annealing into a gas purification device through a second gas transmission pipeline for purification to obtain clean nitrogen;
3) introducing the purified clean nitrogen into a gas storage tank for caching;
4) and (4) introducing the clean nitrogen cached in the gas storage tank into a second gas transmission pipeline through a third gas transmission pipeline for cyclic utilization.
Wherein: before nitrogen is filled into the furnace pipe, the inner cavity of the furnace pipe is pumped into negative pressure of-0.1 to-0.08 MPa by a vacuum pump, and then the nitrogen is filled until the pressure in the furnace pipe reaches 0.1 to 0.12 MPa.
Wherein: and 1) in the annealing process, automatically opening a seventh valve to exhaust when the pressure in the furnace pipe exceeds the set maximum pressure.
The invention discloses a nitrogen purification and recycling technology of a bell jar furnace, which aims to overcome and supplement the defects in the prior art, and provides the nitrogen purification and recycling technology of the bell jar furnace, which can improve the operating environment, improve the utilization rate of nitrogen and waste heat, automatically adjust through an electromagnetic valve, reduce the labor intensity of workers and reduce the production cost and energy consumption. The used nitrogen is purified, then the clean nitrogen is conveyed to the gas storage tank through the gas conveying pipeline, and then the nitrogen is allocated to the nitrogen circulating system for recycling according to the requirement, so that the using amount of the nitrogen in the annealing process of the bell-jar furnace is greatly saved, and the production cost is reduced. Meanwhile, because the annealing is carried out under the condition of heating to a certain temperature, nitrogen discharged from the furnace pipe after the annealing has certain waste heat, the cold pipe after the annealing can be preheated, and the energy consumption is greatly reduced; meanwhile, through purification treatment and waste heat recovery, the environmental pollution is greatly reduced, and the factory operation environment is improved. Through calculation, nitrogen is saved by about 16.5 ten thousand m/year in the average period of the high-yield high-quality cultivation, and energy consumption is saved by 36 ten thousand kW.h.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (10)
1. The utility model provides a bell jar furnace nitrogen gas purification cyclic utilization device which characterized in that: comprises a bell jar furnace, a gas purification device and a gas storage tank; the bell-jar furnace comprises a heating cover and a plurality of furnace seats, and each furnace seat is provided with a furnace pipe; the furnace pipe comprises a first furnace pipe, a second furnace pipe and a third furnace pipe; the heating covers can be respectively arranged outside the first furnace pipe, the second furnace pipe and the third furnace pipe; the input ends of the first furnace pipe, the second furnace pipe and the third furnace pipe are respectively connected with a first gas transmission pipeline; the output ends of the first furnace pipe, the second furnace pipe and the third furnace pipe are respectively connected with a second gas transmission pipeline; the other end of the second gas transmission pipeline is connected with a gas purification device; the other end of the gas purification device is connected with a gas storage tank; the other end of the gas storage tank is connected with a third gas transmission pipeline; and the output end of the third gas transmission pipeline is connected with the first gas transmission pipeline.
2. The bell jar furnace nitrogen gas purification recycling device of claim 1, wherein: the gas purification device comprises a shell, wherein a ceramic filter plate is arranged at the upper part in the shell; and the middle part of the shell is provided with a gas purification component.
3. The bell jar furnace nitrogen gas purification recycling device of claim 1, wherein: a first valve is arranged on a first gas transmission pipeline at the input end of the first furnace pipe; a second valve is arranged on the first gas transmission pipeline at the input end of the second furnace pipe; and a third valve is arranged on the first gas transmission pipeline at the input end of the third furnace pipe.
4. The bell jar furnace nitrogen gas purification recycling device of claim 1, wherein: a fourth valve is arranged on the second gas transmission pipeline at the output end of the first furnace pipe; a fifth valve is arranged on a second gas transmission pipeline at the output end of the second furnace pipe; and a sixth valve is arranged on the second gas transmission pipeline at the output end of the third furnace pipe.
5. The bell jar furnace nitrogen gas purification recycling device of claim 1, wherein: a seventh valve is arranged on the second gas transmission pipeline close to the input end of the gas purification device; and an eighth valve is arranged on the third gas transmission pipeline.
6. The bell jar furnace nitrogen gas purification recycling device of claim 1, wherein: and pressure sensors are arranged in the first furnace pipe, the second furnace pipe and the third furnace pipe.
7. The bell jar furnace nitrogen gas purification recycling device of claim 1, wherein: the air storage tank is wrapped by a heat insulation material, and the thickness of the heat insulation material is 10-20 mm.
8. A process for purifying and recycling nitrogen of a bell jar furnace is characterized by comprising the following steps: the method comprises the following steps:
1) loading a coil to be annealed into a material frame, then loading the coil into a bell-jar furnace base, covering a first furnace pipe, a second furnace pipe or a third furnace pipe, sealing, vacuumizing, filling nitrogen until the pressure in the furnace pipes reaches 0.1-0.12 MPa, covering a heating cover, switching on cooling water and a power supply, and starting the power supply to anneal;
2) introducing nitrogen mixed gas containing oil gas and carbon dust in the first furnace pipe, the second furnace pipe or the third furnace pipe in the annealing process and after annealing into a gas purification device through a second gas transmission pipeline for purification to obtain clean nitrogen;
3) introducing the purified clean nitrogen into a gas storage tank for caching;
4) and (4) introducing the clean nitrogen cached in the gas storage tank into a second gas transmission pipeline through a third gas transmission pipeline for cyclic utilization.
9. The bell jar furnace nitrogen purification recycling process as claimed in claim 8, wherein: before nitrogen is filled into the furnace pipe, the inner cavity of the furnace pipe is pumped into negative pressure of-0.1 to-0.08 MPa by a vacuum pump, and then the nitrogen is filled until the pressure in the furnace pipe reaches 0.1 to 0.12 MPa.
10. The bell jar furnace nitrogen purification recycling process as claimed in claim 8, wherein: and 1) in the annealing process, automatically opening a seventh valve to exhaust when the pressure in the furnace pipe exceeds the set maximum pressure.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010460119.2A CN111578701A (en) | 2020-05-27 | 2020-05-27 | Bell jar furnace nitrogen purification and cyclic utilization device and process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010460119.2A CN111578701A (en) | 2020-05-27 | 2020-05-27 | Bell jar furnace nitrogen purification and cyclic utilization device and process |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200972327Y (en) * | 2006-11-20 | 2007-11-07 | 中国船舶重工集团公司第七二五研究所 | Bell industrial furnace device within firepot type |
| CN202141345U (en) * | 2011-03-30 | 2012-02-08 | 苏州艾唯尔气体设备有限公司 | Tail gas recovering system for annealing furnace |
| CN104110972A (en) * | 2014-07-28 | 2014-10-22 | 苏州新思气体***有限公司 | Tail gas recovery purification recycling device and technology of annealing furnace system |
| CN107502712A (en) * | 2017-09-15 | 2017-12-22 | 中天合金技术有限公司 | A kind of copper strips bell-type annealing technique |
| CN110595221A (en) * | 2019-10-08 | 2019-12-20 | 江苏维麦气体科技有限公司 | Tail gas recycling device and process for galvanizing continuous annealing furnace |
-
2020
- 2020-05-27 CN CN202010460119.2A patent/CN111578701A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200972327Y (en) * | 2006-11-20 | 2007-11-07 | 中国船舶重工集团公司第七二五研究所 | Bell industrial furnace device within firepot type |
| CN202141345U (en) * | 2011-03-30 | 2012-02-08 | 苏州艾唯尔气体设备有限公司 | Tail gas recovering system for annealing furnace |
| CN104110972A (en) * | 2014-07-28 | 2014-10-22 | 苏州新思气体***有限公司 | Tail gas recovery purification recycling device and technology of annealing furnace system |
| CN107502712A (en) * | 2017-09-15 | 2017-12-22 | 中天合金技术有限公司 | A kind of copper strips bell-type annealing technique |
| CN110595221A (en) * | 2019-10-08 | 2019-12-20 | 江苏维麦气体科技有限公司 | Tail gas recycling device and process for galvanizing continuous annealing furnace |
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Address after: 214105 No.18 Xiangyun Road, anzhen street, Xishan District, Wuxi City, Jiangsu Province Applicant after: Jiangsu Longda Super Alloy Co.,Ltd. Address before: 214105 No.18 Xiangyun Road, anzhen street, Xishan District, Wuxi City, Jiangsu Province Applicant before: WUXI LONGDA METAL MATERIALS Co.,Ltd. |
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Application publication date: 20200825 |
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