CN215447461U - Exhaust device of atmosphere furnace - Google Patents
Exhaust device of atmosphere furnace Download PDFInfo
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- CN215447461U CN215447461U CN202121344034.4U CN202121344034U CN215447461U CN 215447461 U CN215447461 U CN 215447461U CN 202121344034 U CN202121344034 U CN 202121344034U CN 215447461 U CN215447461 U CN 215447461U
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Abstract
The utility model discloses an atmosphere furnace exhaust device, which comprises an exhaust main pipe, a thick pipe and a plurality of exhaust devices, wherein the upper end of the exhaust main pipe is connected with a fan, the thick pipe is horizontally arranged below the exhaust main pipe, the lower end of the exhaust main pipe is connected with the thick pipe, two ends of the thick pipe are respectively connected with a thin pipe which is horizontally arranged, the thick pipe and the thin pipe are respectively provided with the exhaust device and an air supplementing port, and the lower end of the exhaust device is communicated with an atmosphere furnace. The exhaust main pipe is connected with the thick pipe, the thin pipes are arranged at two ends of the thick pipe respectively, and the main pipe, the thick pipe and the thin pipes are exhausted through the fan.
Description
Technical Field
The utility model relates to the technical field of heat treatment equipment, in particular to an atmosphere furnace exhaust device.
Background
In the lithium iron phosphate material synthesis industry, high-temperature solid-phase synthesis is carried out by ferric phosphate and lithium carbonate, and the reaction chemical equation is 2FePO4+Li2CO3+C→2LiFePO4+CO2+ CO. The reaction for synthesizing lithium iron phosphate needs to be in N2And carrying out high-temperature sintering synthesis in the atmosphere. The equipment commonly used for sintering comprises a box furnace, a rotary furnace and a roller furnace, and because the atmosphere roller furnace is provided with a good temperature control system, the atmosphere roller furnace sinters lithium iron phosphate to become mainstream equipment for sintering and combining the lithium iron phosphate. In the high-temperature sintering synthesis process of lithium iron phosphate, N is required to be introduced into an atmosphere furnace2Inert gases such as Ar and the like are used as protective atmosphere of materials to ensure that materials in the kiln furnace react in oxygen-free atmosphere, wherein carbon (C) and carbon monoxide (CO) in the raw materials can prevent oxygen in the atmosphere furnace from oxidizing ferrous iron (Fe)2+) Ferrous iron (Fe)2+) Is oxidized into ferric iron (Fe) by oxygen3+) Carbon (C) and carbon monoxide (CO) may convert ferric iron (Fe)3+) Then reduced to ferrous iron (Fe)2+) Therefore, the oxygen concentration of the atmosphere furnace is a very critical process in the high temperature sintering reaction.
N for roller kiln in normal atmosphere2Ar replaces the air in the furnace, and the oxygen concentration in the roller kiln can reach within 50 ppm. However, because the sintering process of the atmosphere furnace needs to exhaust, the top of the atmosphere furnace is provided with an exhaust pipeline, the opening diameter ratio of the exhaust pipeline is larger, and due to the action of thermal motion of oxygen molecules in the air, the air is easily poured into the atmosphere furnace from the exhaust pipeline. Because the kiln is a toxic gas with CO existing in the interim, the kiln exhaust is usually strongly pumped to avoid safety accidents caused by the fact that CO discharged from the kiln enters a workshop. In the process of strong pumping, the phenomenon that air flows back into the furnace is easily caused by the exhaust in a negative pressure state. In the sintering process of the atmosphere furnace, the air flows backwards from the exhaust pipeline to cause abnormal phenomena of high oxygen concentration, periodic fluctuation of oxygen concentration and the like of the atmosphere furnace, and under the abnormal phenomena, the incompletely-reacted lithium iron phosphate is oxidized, so that the material is abnormal, the quality is poor, and even the material is scrapped.
Therefore, according to the characteristics and the reaction mechanism of the lithium iron phosphate material, an atmosphere furnace exhaust device which is simple in structure, good in control effect, convenient for exhaust parameters to be recorded easily, easy to operate, high in flexibility and suitable for lithium iron phosphate sintering and does not introduce air needs to be developed.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides an atmosphere furnace exhaust device which has the characteristics of simple structure, good control effect, convenience in exhaust, easiness in parameter recording, easiness in operation, high flexibility, no air introduction and the like.
According to an embodiment of the first aspect of the present invention, an atmosphere furnace exhaust device is provided at a furnace head and a furnace tail of the atmosphere furnace, respectively, and includes:
the upper end of the exhaust main pipe is connected with a fan;
the thick pipe is horizontally arranged below the exhaust main pipe, the lower end of the exhaust main pipe is connected with the thick pipe, the exhaust main pipe is positioned between two ends of the thick pipe, two ends of the thick pipe are respectively connected with the horizontally arranged thin pipes, and the cross-sectional area of the thick pipe is larger than that of the thin pipes;
a plurality of exhaust apparatus, be equipped with on thick pipe and the tubule respectively exhaust apparatus and tonifying qi mouth, exhaust apparatus's lower extreme with atmosphere stove intercommunication, exhaust apparatus can arrange the waste gas of atmosphere stove extremely thick pipe and tubule.
The exhaust device of the atmosphere furnace according to the embodiment of the utility model has at least the following beneficial effects:
1. the utility model can effectively discharge the waste gas in the atmosphere furnace through the exhaust of the furnace end and the furnace tail, and avoids the abnormal sintering of the lithium iron phosphate caused by the accumulation of the waste gas in the furnace.
2. The main exhaust pipe is connected with the thick pipe, the thin pipes are arranged at two ends of the thick pipe respectively, the thick pipe and the thin pipes can be symmetrically distributed at two sides of the main exhaust pipe, and the main exhaust pipe, the thick pipe and the thin pipes are exhausted by the fan, so that the problem of unbalanced suction force at two ends of the pipeline can be solved.
3. The upper exhaust device and the air supplementing port are respectively arranged on the thick pipe and the thin pipe, the air exhaust force of the thick pipe and the thin pipe can be controlled by adjusting the opening degree of the air supplementing port, strong air exhaust is avoided, and the air exhaust force of each exhaust pipe can be adjusted by adjusting the size of the air supplementing port.
According to some embodiments of the utility model, the main exhaust pipe is located in the middle of the thick pipe, and the exhaust device and the air supplementing ports are symmetrically distributed on two sides of the main exhaust pipe.
According to some embodiments of the utility model, the air supply opening is provided with an insert plate device, and the insert plate device can adjust the opening size of the air supply opening.
According to some embodiments of the utility model, the exhaust device comprises an upper exhaust pipe, a lower exhaust pipe and a movable pipe, the upper end of the upper exhaust pipe is connected with the thick pipe or the thin pipe, the lower end of the lower exhaust pipe is connected with the atmosphere furnace, the movable pipe is located between the upper exhaust pipe and the lower exhaust pipe, the upper end of the movable pipe is connected with the lower end of the upper exhaust pipe through an adjusting mechanism, the adjusting mechanism can adjust the movable pipe to move up and down, and the lower end of the movable pipe is provided with a bell mouth.
According to some embodiments of the utility model, the cross-sectional area of the movable pipe is larger than the cross-sectional areas of the upper exhaust pipe and the lower exhaust pipe, the adjusting mechanism comprises an upper fixing plate, a lower movable plate and a movable bolt, the upper fixing plate is fixedly connected with the upper exhaust pipe, the lower movable plate is fixedly connected with the movable pipe, the upper fixing plate is connected with the lower movable plate through the movable bolt, the movable bolt is sleeved with an adjusting nut, and the adjusting nut is located below the lower movable plate.
According to some embodiments of the utility model, the upper exhaust duct and the lower exhaust duct are each provided with an insert plate device capable of regulating the amount of air flow.
According to some embodiments of the present invention, the board inserting device includes an upper board, a lower board and a board inserting cavity, wherein the board inserting cavity is provided between the upper board and the lower board for the board inserting to move transversely, the upper board and the lower board are provided with through holes, and the upper board and the lower board are fixedly connected.
According to some embodiments of the utility model, the plate inserting device further comprises a limiting bolt, a plurality of grids are divided on the plate inserting device, the limiting bolt is connected to the upper plate in a threaded mode, and the limiting bolt moves downwards to clamp the plate inserting device.
According to some embodiments of the utility model, a thermocouple is disposed on the exhaust main.
According to some embodiments of the utility model, a pressure sensor is provided on the main exhaust pipe.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic view of an atmospheric furnace exhaust apparatus of the present invention;
FIG. 2 is a schematic view of an atmospheric furnace according to the present invention;
FIG. 3 is a schematic view of an exhaust apparatus of the present invention;
FIG. 4 is a front view of the board inserting device of the present invention;
fig. 5 is a top view of the board inserting device of the present invention.
Reference numerals: the device comprises an atmosphere furnace 100, an atmosphere furnace exhaust device 200, an exhaust main pipe 210, a fan 220, a thick pipe 230, a thin pipe 240, an air supplementing port 250, an exhaust device 300, an upper exhaust pipe 310, a lower exhaust pipe 320, a movable pipe 330, a bell mouth 331, an adjusting mechanism 340, an upper fixing plate 341, a lower movable plate 342, a movable bolt 343, an adjusting nut 344, an inserting plate device 400, an upper plate 410, a lower plate 420, an inserting plate 430, an inserting plate cavity 440, a through hole 450, a limiting bolt 460, a thermocouple 500 and a pressure sensor 600.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
Referring to fig. 1-2, an atmosphere furnace exhaust device 200 is respectively disposed at a furnace end and a furnace tail of an atmosphere furnace 100, and exhaust from the furnace end and the furnace tail can effectively discharge waste gas in the atmosphere furnace 100, so as to avoid abnormal sintering of lithium iron phosphate caused by accumulation of waste gas in the furnace. The atmosphere furnace exhaust apparatus 200 includes:
the upper end of the exhaust main pipe 210 is connected with a fan 220;
the thick pipe 230 is horizontally arranged below the exhaust main pipe 210, the lower end of the exhaust main pipe 210 is connected with the thick pipe 230, the exhaust main pipe 210 is positioned between two ends of the thick pipe 230, two ends of the thick pipe 230 are respectively connected with the thin pipes 240 which are horizontally arranged, the cross-sectional area of the thick pipe 230 is larger than that of the thin pipes 240, the thick pipe 230 and the thin pipes 240 can be symmetrically distributed on two sides of the exhaust main pipe 210, the main pipe, the thick pipe 230 and the thin pipes 240 are subjected to air extraction through the fan 220, and the design can reduce the problem of unbalanced suction force at two ends of the pipeline;
the exhaust devices 300 are respectively arranged on the thick pipe 230 and the thin pipe 240, the lower ends of the exhaust devices 300 are communicated with the atmosphere furnace 100, and the exhaust devices 300 can exhaust waste gas of the atmosphere furnace 100 to the thick pipe 230 and the thin pipe 240; thereby the accessible is adjusted the aperture of tonifying qi mouth 250 and is controlled the dynamics of bleeding of thick pipe 230 and tubule 240, avoids strong the taking out, and can adjust the suction of each blast pipe through the size of adjusting tonifying qi mouth 250.
In some embodiments, the main exhaust pipe 210 is located in the middle of the thick pipe 230, the exhaust devices 300 and the air supplementing ports 250 are symmetrically distributed on two sides of the main exhaust pipe 210, specifically, two air supplementing ports 250 are arranged on the thick pipe 230 and are symmetrically distributed, one air supplementing port 250 is arranged on each of the thin pipes 240, two exhaust devices 300 are arranged on each of the thick pipe 230 and the thin pipes 240, and the exhaust devices 300 are symmetrically distributed on the thick pipe 230 and the thin pipes 240 at equal intervals. Because the main exhaust pipe 210 is in the central position, the large two ends in the middle of the suction force of the thick pipe 230 and the thin pipe 240 are small, and the design of the thick ends in the middle of the pipeline can reduce the gas flow rate and suction force in the middle, increase the gas flow rate and suction force at the two ends, and more uniformly solve the problem of unbalanced suction force at different positions when the pipeline is exhausted. The symmetrical distribution of the exhaust devices 300 facilitates uniform exhaust of each exhaust device 300 and maintains a constant draft for each exhaust device 300.
In some embodiments, the air supply opening 250 is provided with an insert plate device 400, and the insert plate device 400 can adjust the opening size of the air supply opening 250. The draft of different positions of the exhaust pipeline can be adjusted by adjusting the opening of the plate inserting device 400, so that the flexibility of adjusting the exhaust process of the atmosphere furnace 100 is increased, and the adjustment and process verification of the exhaust process in the lithium iron phosphate sintering process are facilitated.
In some embodiments, referring to fig. 3, the exhaust apparatus 300 includes an upper exhaust pipe 310, a lower exhaust pipe 320, and a movable pipe 330, wherein an upper end of the upper exhaust pipe 310 is connected to the thick pipe 230 or the thin pipe 240, a lower end of the lower exhaust pipe 320 is connected to the atmosphere furnace 100, the movable pipe 330 is located between the upper exhaust pipe 310 and the lower exhaust pipe 320, an upper end of the movable pipe 330 is connected to a lower end of the upper exhaust pipe 310 through an adjusting mechanism 340, the adjusting mechanism 340 can adjust the movable pipe 330 to move up and down, and a lower end of the movable pipe 330 is provided with a flare 331. The height of the bell mouth 331 is adjusted through the adjusting mechanism 340, and the air supplement amount of the bell mouth 331 is controlled through the height of the bell mouth 331, so that the exhaust draft is controlled, and the negative pressure caused by forced draft is avoided. The height of the bell mouth 331 can be adjusted according to requirements in the whole lithium iron phosphate sintering process, the suction strength is adjusted, the flexibility of adjusting the exhaust process of the atmosphere furnace 100 is facilitated, and the adjustment and process verification of the exhaust process in the lithium iron phosphate sintering process are facilitated. The air exhaust intensity of a certain area can be enhanced or weakened through the height of the individual air exhaust bell mouth 331, when the bell mouth 331 is lowered, the exhaust suction of the temperature area is enhanced, the exhaust gas in the furnace is discharged, and the reaction speed of the reaction of the lithium iron phosphate in the furnace in the temperature area is enhanced.
In some embodiments, the cross-sectional area of the movable tube 330 is larger than the cross-sectional areas of the upper exhaust tube 310 and the lower exhaust tube 320, the adjusting mechanism 340 includes an upper fixing plate 341, a lower movable plate 342, and a movable bolt 343, the upper fixing plate 341 is fixedly connected to the upper exhaust tube 310, the lower movable plate 342 is fixedly connected to the movable tube 330, the upper fixing plate 341 is connected to the lower movable plate 342 through the movable bolt 343, specifically, the upper end of the movable bolt 343 is fixedly connected to the upper fixing plate 341, the lower end of the movable bolt 343 is movably connected to the lower movable plate 342, the movable bolt 343 is sleeved with an adjusting nut 344, and the adjusting nut 344 is located below the lower movable plate 342. The adjusting nut 344 is rotated to move up and down on the movable bolt 343, so as to push the lower movable plate 342 to move up and down, and the lower movable plate 342 drives the lower exhaust pipe 320 to move, thereby realizing the height adjustment of the bell mouth 331.
In some of these embodiments, upper exhaust duct 310 and lower exhaust duct 320 are each provided with an insert plate device 400, where insert plate device 400 is capable of regulating the amount of airflow.
In some embodiments, referring to fig. 4 and 5, the plate inserting device 400 includes an upper plate 410, a lower plate 420 and an inserting plate 430, a plate inserting cavity 440 for the transverse movement of the inserting plate 430 is left between the upper plate 410 and the lower plate 420, through holes 450 are formed in the upper plate 410 and the lower plate 420, the size of the through holes 450 is consistent with the cross-sectional area of the pipeline, and the upper plate 410 and the lower plate 420 are fixedly connected. The exhaust volume and the exhaust section of the inserting plate device 400 are controlled by manually adjusting the inserting and extracting of the inserting plate 430, so that the aim of controlling the exhaust intensity is fulfilled.
In some embodiments, the plate inserting device 400 further comprises a limiting bolt 460, the plate inserting 430 is divided into a plurality of grids, the limiting bolt 460 is screwed on the upper plate 410, and the limiting bolt 460 moves downwards to clamp the plate inserting 430. The cross section area of the exhaust pipeline in the plate inserting device 400 can be accurately controlled by controlling the number of the inserting plates 430, so that the pumping force of the upper pipeline is increased or reduced, and the effect of adjusting the pumping intensity of the process is achieved. For example, the number of 0-10 grids is marked on the insertion plate 430, the scale intervals marked by 0-10 are the same, the pipeline is fully closed when the insertion plate 430 is inserted into the scale of 0, the pipeline is fully opened when the insertion plate 430 is inserted into the scale of 10, and the pipeline is opened by 50% when the insertion plate 430 is inserted into the scale of 5. The exhaust grid number of the upper inserting plate 430 and the lower inserting plate 430 can be recorded definitely, so that the aim of recording the exhaust process of the kiln is fulfilled, the process design and the process recording of different products are facilitated, and the exhaust process of the kiln can be copied rapidly by quantifying the lithium iron phosphate sintering exhaust process. The upper plate 410 is provided with a limit bolt 460, the limit bolt 460 can rotate up and down on the upper plate 410, and the inserting plate 430 can be prevented from being shifted due to vibration by clamping the inserting plate 430 downwards, so that process deviation of the inserting plate 430 is avoided.
In some embodiments, the main exhaust pipe 210 is provided with a thermocouple 500 for monitoring the temperature of the gas in the main exhaust pipe 210.
In some embodiments, the main exhaust pipe 210 is provided with a pressure sensor 600 for monitoring the pressure of the gas in the main exhaust pipe 210.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (10)
1. The utility model provides an atmosphere stove exhaust apparatus, its characterized in that, atmosphere stove exhaust apparatus locates respectively the furnace end and the stove tail of atmosphere stove, atmosphere stove exhaust apparatus includes:
the upper end of the exhaust main pipe is connected with a fan;
the thick pipe is horizontally arranged below the exhaust main pipe, the lower end of the exhaust main pipe is connected with the thick pipe, the exhaust main pipe is positioned between two ends of the thick pipe, two ends of the thick pipe are respectively connected with the horizontally arranged thin pipes, and the cross-sectional area of the thick pipe is larger than that of the thin pipes;
a plurality of exhaust apparatus, be equipped with on thick pipe and the tubule respectively exhaust apparatus and tonifying qi mouth, exhaust apparatus's lower extreme with atmosphere stove intercommunication, exhaust apparatus can arrange the waste gas of atmosphere stove extremely thick pipe and tubule.
2. The atmosphere furnace exhaust device according to claim 1, wherein the main exhaust pipe is located in the middle of the thick pipe, and the exhaust device and the air supplement ports are symmetrically distributed on both sides of the main exhaust pipe.
3. The atmosphere furnace exhaust device according to claim 1, wherein the gas supplementing port is provided with a plate inserting device, and the plate inserting device can adjust the opening size of the gas supplementing port.
4. The atmosphere furnace exhaust device according to claim 1, wherein the exhaust device comprises an upper exhaust pipe, a lower exhaust pipe and a movable pipe, the upper end of the upper exhaust pipe is connected with the thick pipe or the thin pipe, the lower end of the lower exhaust pipe is connected with the atmosphere furnace, the movable pipe is located between the upper exhaust pipe and the lower exhaust pipe, the upper end of the movable pipe is connected with the lower end of the upper exhaust pipe through an adjusting mechanism, the adjusting mechanism can adjust the movable pipe to move up and down, and the lower end of the movable pipe is provided with a bell mouth.
5. The atmosphere furnace exhaust device according to claim 4, wherein the cross-sectional area of the movable pipe is larger than the cross-sectional areas of the upper exhaust pipe and the lower exhaust pipe, the adjusting mechanism comprises an upper fixing plate, a lower movable plate and a movable bolt, the upper fixing plate is fixedly connected with the upper exhaust pipe, the lower movable plate is fixedly connected with the movable pipe, the upper fixing plate is connected with the lower movable plate through the movable bolt, the movable bolt is sleeved with an adjusting nut, and the adjusting nut is positioned below the lower movable plate.
6. The atmosphere furnace exhaust apparatus according to claim 4, wherein the upper exhaust pipe and the lower exhaust pipe are each provided with an insert plate apparatus capable of adjusting an amount of air flow.
7. An atmosphere furnace exhaust device according to any one of claims 3 or 6, wherein the plate inserting device comprises an upper plate, a lower plate and an inserting plate, a plate inserting cavity for the inserting plate to move transversely is reserved between the upper plate and the lower plate, through holes are formed in the upper plate and the lower plate, and the upper plate and the lower plate are fixedly connected.
8. The atmosphere furnace exhaust apparatus according to claim 7, wherein the plate inserting apparatus further comprises a limiting bolt, a plurality of grids are divided on the plate inserting apparatus, the limiting bolt is connected to the upper plate in a threaded manner, and the limiting bolt moves downwards to clamp the plate inserting apparatus.
9. The atmosphere furnace exhaust apparatus according to claim 1, wherein a thermocouple is provided on the exhaust main pipe.
10. The atmosphere furnace exhaust apparatus according to claim 1, wherein a pressure sensor is provided on the exhaust main pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121344034.4U CN215447461U (en) | 2021-06-16 | 2021-06-16 | Exhaust device of atmosphere furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121344034.4U CN215447461U (en) | 2021-06-16 | 2021-06-16 | Exhaust device of atmosphere furnace |
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| Publication Number | Publication Date |
|---|---|
| CN215447461U true CN215447461U (en) | 2022-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121344034.4U Active CN215447461U (en) | 2021-06-16 | 2021-06-16 | Exhaust device of atmosphere furnace |
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| CN (1) | CN215447461U (en) |
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2021
- 2021-06-16 CN CN202121344034.4U patent/CN215447461U/en active Active
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