CN117776494A - Discharging method of cold crucible - Google Patents
Discharging method of cold crucible Download PDFInfo
- Publication number
- CN117776494A CN117776494A CN202311828524.5A CN202311828524A CN117776494A CN 117776494 A CN117776494 A CN 117776494A CN 202311828524 A CN202311828524 A CN 202311828524A CN 117776494 A CN117776494 A CN 117776494A
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- power
- discharging
- power supply
- crucible
- stirring device
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- 238000007599 discharging Methods 0.000 title claims abstract description 92
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000003756 stirring Methods 0.000 claims abstract description 42
- 230000001965 increasing effect Effects 0.000 claims abstract description 23
- 239000000155 melt Substances 0.000 claims abstract description 16
- 238000002844 melting Methods 0.000 claims abstract description 11
- 230000008018 melting Effects 0.000 claims abstract description 11
- 239000007788 liquid Substances 0.000 claims abstract description 4
- 239000007787 solid Substances 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 14
- 239000011521 glass Substances 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000010079 rubber tapping Methods 0.000 claims description 4
- 230000035939 shock Effects 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 239000012857 radioactive material Substances 0.000 abstract description 2
- 230000006698 induction Effects 0.000 description 9
- 230000008901 benefit Effects 0.000 description 2
- 230000005672 electromagnetic field Effects 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000156 glass melt Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
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- Crucibles And Fluidized-Bed Furnaces (AREA)
Abstract
The embodiment of the invention relates to the technical field of radioactive material treatment, in particular to a discharging method of a cold crucible. During operation of the cold crucible, the melt formed by melting is intermittently discharged from the cold crucible, the discharge method comprising: when the last discharging is finished, the second power supply is controlled to be maintained at the preset power so as to preheat the discharging pipe; before each discharging, the power of the first power supply is increased; adjusting the state of the stirring device; raising the power of the second power supply until the power of the second power supply reaches the discharge power, so that the solidified melt in the discharge pipe is changed from solid to liquid to conduct the discharge pipe; and waiting for the molten body in the crucible body to flow out through the discharging pipe, so as to realize discharging. By adopting the discharging method provided by the embodiment of the invention, the waiting time for discharging can be shortened, the high-temperature running time of the discharging pipe can be reduced, the influence of thermal shock on the discharging pipe and the bottom of the cold crucible can be reduced, and the service life of the discharging pipe can be prolonged.
Description
Technical Field
The embodiment of the invention relates to the technical field of radioactive material treatment, in particular to a discharging method of a cold crucible.
Background
The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art. The cold crucible glass solidifying technology is to utilize a high-frequency power supply to generate high-frequency current, then convert the high-frequency current into electromagnetic current through a high-frequency induction coil, penetrate into the material to be treated to form vortex and generate heat, so that the material to be treated is melted into glass. The inner wall of the furnace body of the crucible is filled with cooling water, and the melt in the crucible solidifies on the inner wall of the crucible to form a cold wall, and is therefore called a cold crucible. In the operation process of the cold crucible, the discharge waiting time of the cold crucible influences the planning of the intermediate frequency starting time, the melting period and the operation period of the cold crucible, and the shortening of the discharge waiting time has important significance for planning the reasonable use of equipment such as high frequency equipment, intermediate frequency equipment and the like and prolonging the operation life of a discharge pipe.
Disclosure of Invention
The following presents a simplified summary of the application in order to provide a basic understanding of some aspects of the application. It should be understood that this summary is not an exhaustive overview of the application. It is not intended to identify key or critical elements of the application or to delineate the scope of the application. Its purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is discussed later.
The embodiment of the invention provides a discharging method of a cold crucible. The cold crucible is used for heating glass and materials to be treated to fuse the glass and the materials to be treated to form a melt so as to solidify the glass of the materials to be treated. The cold crucible includes: crucible body, discharging pipe, first power, second power and agitating unit, the discharging pipe is connected in the bottom of crucible body, and first power is used for heating the material in the crucible body, and the second power is used for heating the fused mass that solidifies in the discharging pipe, and agitating unit movably sets up in the crucible body for stir the fused mass. During operation of the cold crucible, the melt formed by melting is intermittently discharged from the cold crucible; the discharging method comprises the following steps: when the last discharging is finished, the second power supply is controlled to be maintained at the preset power so as to preheat the discharging pipe; before each discharging, the power of the first power supply is increased; adjusting the state of the stirring device; raising the power of the second power supply until the power of the second power supply reaches the discharge power, so that the solidified melt in the discharge pipe is changed from solid to liquid to conduct the discharge pipe; and waiting for the molten body in the crucible body to flow out through the discharging pipe, so as to realize discharging.
By adopting the discharging method provided by the embodiment of the invention, the waiting time for discharging can be shortened, the high-temperature running time of the discharging pipe can be reduced, the influence of thermal shock on the discharging pipe and the bottom of the cold crucible can be reduced, and the service life of the discharging pipe can be prolonged.
Drawings
Other objects and advantages of the present invention will become apparent from the following description of embodiments of the present invention, which is to be read in connection with the accompanying drawings, and may assist in a comprehensive understanding of the present invention.
Fig. 1 is a schematic view of a cold crucible according to an embodiment of the present invention.
Fig. 2 is a flow chart of a cold crucible discharging method according to an embodiment of the present invention.
It should be noted that the drawings are not necessarily to scale, but are merely shown in a schematic manner that does not affect the reader's understanding.
Detailed Description
Exemplary embodiments of the present invention will be described hereinafter with reference to the accompanying drawings. In the interest of clarity and conciseness, not all features of an actual implementation are described in this specification. It will of course be appreciated that in the development of any such actual embodiment, numerous implementation-specific decisions must be made in order to achieve the developer's specific goals, such as compliance with system-and business-related constraints, and that these constraints will vary from one implementation to another. Moreover, it will be appreciated that such a development effort might be complex and time-consuming, but would nevertheless be a routine undertaking for those of ordinary skill in the art having the benefit of this disclosure.
It should be noted here that, in order to avoid obscuring the present invention due to unnecessary details, only the device structures and/or processing steps closely related to the solution according to the present invention are shown in the drawings, while other details not greatly related to the present invention are omitted.
In the operation process of the cold crucible, the materials in the cold crucible are discharged intermittently, and when the materials are discharged, the heating power of the intermediate frequency power supply is generally directly increased to the discharging power, then the materials can be discharged after waiting for a certain time, and when the discharging is finished, the intermediate frequency power supply is turned off for heating. The inventor of the invention discovers that when the method is adopted for discharging, the waiting time of discharging fluctuates between 1h and 3h, the waiting time is long, the glass melting time is shortened, the quality of glass products cannot be ensured, and the discharging pipe is in a high-temperature state for a long time, so that the service life of the discharging pipe is extremely unfavorable.
Based on the above, the embodiment of the invention provides a discharging method for shortening the waiting time of discharging.
As shown in fig. 1, the cold crucible includes a crucible body 10, a discharge pipe 20, a first induction coil 30, a second induction coil 40, a stirring device 50, a first power source, and a second power source. The first induction coil 30 surrounds the crucible body 10, and the first power supply supplies power to the first induction coil 30 to heat the material in the crucible body 10. The tapping pipe 20 is connected to the bottom of the crucible body 10, and a second induction coil 40 surrounds the tapping pipe 20, and a second power source supplies power to the second induction coil 40 to heat the molten mass solidified in the tapping pipe 20. The stirring device 50 is movably disposed in the crucible body 10 for stirring the melt 100 in the crucible body 10. The first power supply is a high-frequency power supply, and the second power supply is an intermediate-frequency power supply.
Fig. 2 shows a schematic flow chart of a method for discharging a cold crucible according to the present invention. As shown in fig. 2, in this embodiment, during the operation of the cold crucible, the melt formed by melting is intermittently discharged from the cold crucible, and the discharging method specifically includes the following steps S10 to S50.
And S10, when the last discharging is finished, controlling the second power supply to maintain the preset power so as to preheat the discharging pipe.
Step S20, before discharging each time, the power of the first power supply is increased.
Step S30, adjusting the state of the stirring device.
And S40, raising the power of the second power supply until the power of the second power supply reaches the discharge power, so that the solidified melt in the discharge pipe is changed from a solid state to a liquid state, and the discharge pipe is conducted.
And S50, waiting for the molten mass in the crucible body to flow out through a discharge pipe, and realizing discharge.
In this embodiment, by preheating the discharge pipe 20 during the two discharge gaps, the time for the power of the second power supply to rise to the discharge power during the discharge is shortened; meanwhile, by lifting the power of the first power supply and adjusting the stirring device 50 before discharging, the melting of the solidified glass cold shell at the discharge hole at the bottom of the crucible body 10 is accelerated, and the conduction of the discharge channel is accelerated, so that the discharge waiting time is shortened, the high-temperature running time of the discharge pipe 20 is effectively shortened, and the influence of thermal shock on the discharge pipe 20 and the bottom of the crucible body 10 is reduced.
In some embodiments, when the discharging pipe is preheated in step S10, the predetermined power of the second power supply may be 2-15 kW, so that the second power supply is maintained within the range of the predetermined power, and when discharging is required subsequently, the time for raising the second power supply to the discharging power can be greatly shortened, and the shortest time can be shortened to 20 minutes, and meanwhile, the influence on the service life of the discharging pipe caused by the overhigh temperature of the discharging pipe can be avoided.
In some embodiments, the melt within the cold crucible may be tapped once at predetermined intervals. In step S20, the power of the first power source may be raised when a first predetermined time before discharging is reached. Wherein the first predetermined time may be 90 minutes.
According to the embodiment, the power of the first power supply is increased to generate a stronger electromagnetic field in the crucible body, so that the temperature of the molten body is increased, the temperature of the molten body at the bottom in the crucible body is increased, the solidified glass cold shell at the discharge hole at the bottom of the crucible body is preheated, and the conduction of the discharge channel in the subsequent step S40 is accelerated. And by lifting the power of the first power supply within a first preset time before discharging, the discharging process and time can be fixed, and the operation period of the cold crucible can be solidified.
In some embodiments, the power of the first power source is boosted to be within a predetermined range. Wherein the predetermined range may be 100-400 kW, thereby providing a temperature of the melt in the cold crucible while avoiding excessive temperatures thereof.
In some embodiments, adjusting the state of the stirring device in step S30 includes: and adjusting the stirring mode of the stirring device. During melting of the material to be treated, the stirring device 50 rotates at a certain rotational speed in the crucible body 10 to stir the melt so that its composition is uniform. In this embodiment, the stirring mode of the stirring device 50 is adjusted before discharging, so that the molten mass 100 in the crucible body 10 is stirred more fully, the temperature of the molten mass 100 in the crucible body 10 tends to be uniform, and the temperature of the molten mass 100 at the bottom position in the crucible body 10 is increased.
In some embodiments, adjusting the stirring mode of the stirring device may include: the stirring device is controlled to reciprocate up and down and rotate simultaneously. The first induction coil 30 generates an uneven electromagnetic field in the crucible body 10, resulting in a higher temperature of the melt in the region of the middle of the crucible body where the magnetic field is stronger and a lower temperature of the melt in the region of the bottom where the magnetic field is weaker. In the embodiment, the stirring device is controlled to reciprocate and move up and down before discharging, so that the molten mass is stirred up and down, the temperature of the molten mass at the bottom position in the crucible body is increased, the melting of the solidified glass cold shell at the discharge hole at the bottom of the crucible body is accelerated, and the discharging waiting time is shortened.
In some embodiments, controlling the agitating device to reciprocate up and down includes: in the reciprocating elevating movement, as shown in fig. 1, the position of the stirring blade 51 of the stirring device 50 is controlled within a predetermined distance range from the bottom of the crucible body 10. Which may be in the range of 10 to 110mm. In this embodiment, the stirring blade 51 is controlled to reciprocate up and down within a predetermined distance range, so that the melt at the bottom is stirred by tumbling up and down to raise the temperature thereof.
In some embodiments, adjusting the state of the stirring device further includes adjusting the rotational speed of the stirring device, e.g., increasing the rotational speed of the stirring device, thereby accelerating mixing of the melt at different locations and homogenizing the temperature of the melt.
In some embodiments, starting to boost the power of the second power source when a second predetermined time before the discharging is reached; wherein the second predetermined time is less than the first predetermined time. The second predetermined time may be 30 minutes. In this embodiment, when 30 minutes before discharging is reached, the power of the second power supply is increased, so that the second induction coil 40 generates a stronger magnetic field in the discharging pipe 20 to heat the discharging pipe 20 to melt the solidified melt therein, thereby realizing the conduction of the discharging pipe.
In some embodiments, when the power of the second power supply is increased, the power of the second power supply may be increased stepwise or linearly until the discharge power is reached. Wherein, the discharge power can be 25kW. Further, at the time of boosting the power, the boosting rate of the power may be set to 0.1 to 5kW/min.
After the power of the second power supply rises to the discharging power, the melting body solidified at the discharging hole at the bottom of the crucible body and in the discharging pipe is completely melted, and the melting body in the crucible body can flow out through the discharging pipe, so that discharging is realized.
According to the embodiment of the invention, the power of the first power supply is increased in the first preset time before discharging, the state of the stirring device is adjusted, and meanwhile, the power of the second power supply is increased in the second preset time before discharging, so that the process parameters during discharging can be fixed, the discharging time is solidified, the operation period of the cold crucible is solidified, the operation period fluctuation caused by the fluctuation of the waiting time of discharging is avoided, and the quality of the discharged glass melt is ensured.
By adopting the discharging method provided by the embodiment of the invention, the waiting time for discharging can be shortened to be within 30 minutes, the high-temperature running time of the discharging pipe is effectively shortened, and the influence of thermal shock on the discharging pipe and the crucible bottom is reduced.
The method for discharging the cold crucible provided by the invention is further described in the following specific examples.
Firstly, after the last discharging work is completed, the power of the intermediate frequency power supply is maintained to be 5kW so as to preheat the discharging pipe.
When 90min before discharging is reached, the power of the high-frequency power supply is increased to 300kW, the stirring paddle is controlled to rotate, and the lowest point of the stirring paddle is controlled to continuously lift and circulate within the range of 10-110 mm from the crucible bottom.
When 30min before discharging is reached, the power of the intermediate frequency power supply is increased to 10kW, then the power of the intermediate frequency power supply is increased to 5kW every 10min until the power of the intermediate frequency power supply is increased to 25kW, and discharging is waited.
In this example, after the power of the intermediate frequency power supply was raised to 25kW, the cold crucible was waited for 20 minutes and discharge started.
It should also be noted that, in the embodiments of the present invention, the features of the embodiments of the present invention and the features of the embodiments of the present invention may be combined with each other to obtain new embodiments without conflict.
The present invention is not limited to the above embodiments, but the scope of the invention is defined by the claims.
Claims (10)
1. A discharging method of a cold crucible, wherein the cold crucible is used for heating glass and materials to be treated to fuse the glass and the materials to be treated to form a melt so as to solidify the glass; it is characterized in that the method comprises the steps of,
the cold crucible includes: the crucible comprises a crucible body, a discharging pipe, a first power supply, a second power supply and a stirring device, wherein the discharging pipe is connected to the bottom of the crucible body, the first power supply is used for heating materials in the crucible body, the second power supply is used for heating a molten mass solidified in the discharging pipe, and the stirring device is movably arranged in the crucible body and is used for stirring the molten mass;
during operation of the cold crucible, the melt formed by melting is intermittently discharged from the cold crucible; the discharging method comprises the following steps:
when the last discharging is finished, controlling the second power supply to maintain the preset power so as to preheat the discharging pipe;
before each discharging, the power of the first power supply is increased;
adjusting the state of the stirring device;
the power of the second power supply is increased until the power of the second power supply reaches the discharge power, so that the solidified melt in the discharge pipe is converted from a solid state to a liquid state, and the discharge pipe is conducted;
and waiting for the molten mass in the crucible body to flow out through the discharging pipe so as to realize discharging.
2. The method of claim 1, wherein said adjusting the state of the stirring device comprises:
and adjusting the stirring mode of the stirring device.
3. The method of claim 2, wherein adjusting the stirring mode of the stirring device comprises:
and controlling the stirring device to reciprocate, and simultaneously rotate.
4. A method according to claim 3, wherein said controlling said agitating means to reciprocate up and down comprises:
and controlling the position of the stirring blade of the stirring device within a preset distance range from the bottom of the crucible body during the reciprocating lifting movement.
5. The method of claim 1, wherein said adjusting the state of the stirring device comprises:
and adjusting the rotating speed of the stirring device.
6. The method of claim 1, wherein the power of the first power source is increased when a first predetermined time before the discharging is reached.
7. The method of claim 6, wherein the power of the first power source is boosted to be within a predetermined range.
8. The method of claim 6, wherein the step of starting boosting the power of the second power source when a second predetermined time before the step-out is reached; wherein the second predetermined time is less than the first predetermined time.
9. The method according to claim 1, characterized in that the predetermined power of the second power supply is 2-15 kW when preheating the tapping pipe.
10. The method of claim 1, wherein said boosting the power of the second power source comprises:
and step-wise or linearly increasing the power of the second power supply until the discharging power is reached.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311828524.5A CN117776494A (en) | 2023-12-27 | 2023-12-27 | Discharging method of cold crucible |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311828524.5A CN117776494A (en) | 2023-12-27 | 2023-12-27 | Discharging method of cold crucible |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117776494A true CN117776494A (en) | 2024-03-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311828524.5A Pending CN117776494A (en) | 2023-12-27 | 2023-12-27 | Discharging method of cold crucible |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117776494A (en) |
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2023
- 2023-12-27 CN CN202311828524.5A patent/CN117776494A/en active Pending
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