CN115682711A - Pressure control method in rotary calcining furnace - Google Patents
Pressure control method in rotary calcining furnace Download PDFInfo
- Publication number
- CN115682711A CN115682711A CN202211404606.2A CN202211404606A CN115682711A CN 115682711 A CN115682711 A CN 115682711A CN 202211404606 A CN202211404606 A CN 202211404606A CN 115682711 A CN115682711 A CN 115682711A
- Authority
- CN
- China
- Prior art keywords
- negative pressure
- furnace body
- furnace
- compressed air
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Muffle Furnaces And Rotary Kilns (AREA)
Abstract
The embodiment of the invention provides a pressure control method in a rotary calcining furnace. The rotary calcining furnace comprises a furnace body, a sealing element and a tail gas pipe communicated with the furnace body, wherein an air extraction device is arranged on the tail gas pipe; the sealing pieces are hermetically sleeved at the two ends of the furnace body, and the furnace body can rotate relative to the sealing pieces; the method comprises the following steps: when the rotary calcining furnace starts to operate, starting an air extracting device, adjusting the pressure in the furnace body to negative pressure, and maintaining the negative pressure in the furnace body within a preset operation range; monitoring the negative pressure in the furnace body in real time; when the negative pressure in the furnace body is reduced, compressed air is continuously conveyed into the sealing element, so that the negative pressure in the furnace is maintained at the current negative pressure value. According to the method for controlling the pressure in the rotary calcining furnace provided by the embodiment of the invention, compressed air is continuously conveyed into the sealing element when the negative pressure in the furnace body is reduced, so that the gas in the furnace body is not leaked out from the sealing element any more, the negative pressure in the furnace body is maintained stable, and the normal operation of the process is ensured.
Description
Technical Field
The embodiment of the invention relates to the field of radioactive waste treatment, in particular to a pressure control method in a rotary calciner.
Background
When radioactive waste liquid is treated by using a hot crucible or cold crucible glass solidification technology, a rotary calciner is required to calcine the radioactive waste liquid. The rotary calcining furnace has the characteristics of simple operation, high treatment capacity and the like, can remove moisture and most nitrate radicals in the waste liquid through the processes of evaporation and calcination before the waste liquid enters a hot crucible or a cold crucible, converts the water and most nitrate radicals into solid particles, and solves the problems of air pressure fluctuation, melting time extension and the like in the subsequent hot crucible or cold crucible.
When the rotary calcining furnace is used for calcining radioactive waste liquid, the interior of the furnace is in a negative pressure state, and sealing parts are required to be arranged at two ends of the furnace body, so that the furnace body can keep sealing while rotating. However, in the actual operation process, along with the extension of the working time, the sealing element is worn to cause the reduction of the sealing performance of the furnace body, so that gas generated by calcination leaks, and the negative pressure in the calcination furnace fluctuates to influence the process operation.
Disclosure of Invention
In view of the above problems, embodiments of the present invention provide a method for controlling pressure in a rotary calciner. The rotary calcining furnace comprises a furnace body, a sealing element and a tail gas pipe communicated with the furnace body, wherein an air exhaust device is arranged on the tail gas pipe; the sealing elements are sleeved at two ends of the furnace body in a sealing manner, and the furnace body can rotate relative to the sealing elements. The method comprises the following steps: when the rotary calcining furnace starts to operate, starting an air extracting device, adjusting the pressure in the furnace body to negative pressure, and maintaining the negative pressure in the furnace body within a preset operation range; monitoring the negative pressure in the furnace body in real time; when the negative pressure in the furnace body is reduced, compressed air is continuously conveyed into the sealing element, so that the negative pressure in the furnace is maintained at the current negative pressure value.
According to the method for controlling the pressure in the rotary calcining furnace provided by the embodiment of the invention, when the negative pressure in the furnace body is reduced, the leakage of the gas in the furnace body from the sealing part is slowed down by continuously conveying the compressed air into the sealing part, so that the negative pressure in the furnace body is maintained in a normal working range, and the normal operation of the process is ensured.
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 flow diagram of a pressure control method according to one embodiment of the invention.
Fig. 2 is a schematic structural view of a rotary calciner according to one embodiment of the invention.
Fig. 3 is a schematic structural view of an end portion of a rotary calciner according to an embodiment of the present invention.
Fig. 4 is a schematic structural view of a negative pressure control device of a rotary calciner according to one embodiment of the present invention.
It should be noted that the drawings are not necessarily drawn to scale and are merely shown in a schematic manner that does not interfere with the understanding of those skilled in the art.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is to be noted that, unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. If the description "first", "second", etc. is referred to throughout, the description of "first", "second", etc. is used only for distinguishing similar objects, and is not to be construed as indicating or implying a relative importance, order or number of technical features indicated, it being understood that the data described in "first", "second", etc. may be interchanged where appropriate. If "and/or" is presented throughout, it is meant to include three juxtapositions, exemplified by "A and/or B" and including either scheme A, or scheme B, or schemes in which both A and B are satisfied. Furthermore, for convenience in description, spatially relative terms, such as "above," "below," "top," "bottom," and the like, may be used herein to describe one element or feature's spatial relationship to another element or feature as illustrated in the figures, and should be understood to encompass different orientations in use or operation in addition to the orientation depicted in the figures.
The embodiment of the invention provides a pressure control method in a rotary calcining furnace. In this embodiment, the rotary calciner comprises a calciner body, a sealing element and a tail gas pipe communicated with the calciner body, wherein an air exhaust device is arranged on the tail gas pipe; the sealing elements are sleeved at two ends of the furnace body in a sealing manner, and the furnace body can rotate relative to the sealing elements. Fig. 1 shows a flow diagram of a pressure control method according to an embodiment of the invention. As shown in fig. 1, the method includes: step 1, starting an air extraction device when a rotary calcining furnace starts to operate, adjusting the pressure in the furnace body to negative pressure, and maintaining the negative pressure in the furnace body within a preset operation range; step 2, monitoring the negative pressure in the furnace body in real time; and 3, when the negative pressure in the furnace body is reduced, continuously conveying compressed air into the sealing element so as to maintain the negative pressure in the furnace at the current negative pressure value.
According to the method for controlling the pressure in the rotary calcining furnace provided by the embodiment of the invention, when the negative pressure in the furnace body is reduced, the leakage of the gas in the furnace body from the sealing part is slowed down by continuously conveying the compressed air into the sealing part, so that the negative pressure in the furnace body is maintained to be stable and not reduced any more, and the normal operation of the process is ensured.
The rotary calcining furnace can comprise a furnace body, a sealing element and a tail gas pipe communicated with the furnace body.
Fig. 2 shows a schematic structural view of a rotary calciner according to one embodiment of the invention. As shown in fig. 2, the furnace body 10, which is a main body portion of the rotary calciner, has a space for treating radioactive waste, which may be radioactive waste liquid. The furnace body 10 is also provided with a heating device for heating the furnace body to realize the calcination of the radioactive wastes. The furnace body 10 is provided at both ends thereof with a furnace head 11 and a furnace tail 12 communicated with the furnace body 10, respectively. The furnace end 11 is provided with a tail gas pipe 40.
When the radioactive waste liquid is calcined, the radioactive waste liquid is fed into the furnace body 10 from the furnace head 11 and contacts the inner wall of the furnace body 10 with high temperature, so that the radioactive waste liquid is heated, evaporated and calcined, the solid product formed by the calcination is discharged from the furnace tail 12, and the generated tail gas is discharged from the tail gas pipe 40.
In addition, when the radioactive waste liquid is calcined, the furnace body 10 needs to be kept rotating, so that the radioactive waste liquid input into the furnace body 10 is sufficiently contacted with the inner wall of the furnace body, thereby realizing efficient calcination of the radioactive waste liquid. In order to maintain the sealing between the rotating furnace body 10 and the fixed furnace head 11 and furnace tail 12 and prevent the tail gas generated by the calcination from leaking from the connection between the furnace body 10 and the furnace head 11 or furnace tail 12, sealing members 20 are disposed at the two ends of the furnace body 10, the sealing members 20 are sealingly sleeved at the two ends of the furnace body 10, and the sealing members 20 are sealingly and fixedly connected with the furnace head 11 or furnace tail 12, thereby achieving the sealing between the furnace body 10 and the furnace head 11 or furnace tail 12. In the present embodiment, the sealing member 20 is a dynamic sealing structure of the furnace body 10, and the furnace body 10 can rotate relative to the sealing member 20, so that the furnace body 10 can rotate even in a state where the sealing member 20 is kept fixed.
Fig. 3 shows a schematic structural view of an end of a rotary calciner according to one embodiment of the invention. As shown in fig. 3, in some embodiments, the sealing element 20 may be a cylindrical structure, an inner wall of the cylindrical structure may protrude inward to form a plurality of annular sealing structures 21, a certain distance is provided between adjacent annular sealing structures 21, the plurality of annular sealing structures 21 and an outer wall of the furnace body 10 form a zigzag winding air path channel, and the winding air path channel may slow down the air flow, thereby achieving sealing.
As shown in FIG. 2, in some embodiments, the exhaust pipe 40 is connected to the interior of the furnace body 10, and the exhaust pipe 40 is provided with an air extractor 41. It is understood that when the calcination of the radioactive waste is performed, gas products, such as gases with radionuclides, nitrogen oxide gases, etc., are generated and may cause pollution, and therefore, the offgas duct 40 is required to introduce the gas products generated during the calcination into an offgas processing apparatus for subsequent processing. The exhaust pipe 40 can be connected with an air extractor 41, the air extractor 41 extracts air from the furnace body 10 through the exhaust pipe 40, so that harmful gas is extracted through the exhaust pipe 40, and negative pressure can be formed in the furnace body 10 due to the fact that the air extractor 41 continuously extracts air from the furnace body 10 while the harmful gas is extracted.
When the rotary calciner starts to operate, the air extraction device 41 is started to adjust the pressure in the kiln body 10 to negative pressure, and the negative pressure in the kiln body 10 is maintained within a preset operation range, so that the process is normally performed. After the rotary calciner works for a period of time, the sealing element 20 may be abraded due to the rotation of the calciner body, high temperature, gas corrosion and the like, so that the sealing performance is reduced, and further, the gas leakage phenomenon is generated.
After the air leakage phenomenon is generated, the air in the external environment can enter the furnace body 10 from the gap between the sealing element 20 and the furnace body 10, so that the negative pressure in the furnace body 10 is reduced; meanwhile, the air entering the furnace body can be pumped away when the air pumping device 41 pumps air to the furnace body, so that the air pumping device 41 cannot completely pump out the gas product generated in the furnace body 10, and the gas product in the furnace body 10 is diffused to the external environment, thereby causing pollution to the external environment. It should be noted that once the sealing performance of the sealing element 20 is reduced, although the furnace body 10 is at a negative pressure, the harmful gas in the furnace body 10 has a high concentration and temperature, and the gas product can still diffuse into the external environment along the gap between the sealing element 20 and the furnace body 10 to pollute the external environment.
In the embodiment of the invention, the negative pressure in the furnace body 10 is monitored in real time, and once the negative pressure is monitored to be reduced, compressed air is conveyed into the sealing element 20, so that the reduction amplitude of the negative pressure is controlled within a certain range, the process is normally carried out, and harmful gas products are prevented from escaping into the external environment.
In some embodiments, compressed air may be delivered into the gap between the sealing member 20 and the furnace body 10, and after the compressed air is delivered into the gap between the sealing member 20 and the furnace body 10, the compressed air will flow into the furnace body 10 along the gap, and the compressed air flowing into the furnace body 10 along the gap will block the gas products diffused out of the furnace body 10 along the gap, so that the gas products cannot be diffused into the external environment. Meanwhile, after the compressed air is conveyed into the sealing element 20, the compressed air forms a gas barrier in the gap to interfere the exchange between the gas product in the furnace body 10 and the gas in the external environment, and the negative pressure in the furnace body 10 can be kept stable without being continuously reduced by controlling the flow rate and the pressure of the compressed air. In some embodiments, the compressed air may be delivered for a duration of time while being delivered into seal 20 to maintain the negative pressure steady for a period of time and to prevent harmful gaseous products from contaminating the environment.
In addition, the negative pressure decrease in the embodiment of the present invention means that the absolute value of the negative pressure becomes small, for example, the negative pressure decreases from-300 Pa to-200 Pa.
In some embodiments, the real-time monitoring of the negative pressure in the furnace body 10, and the continuous feeding of compressed air into the sealing member 20 when the negative pressure in the furnace body 10 decreases, comprises: monitoring the negative pressure at two ends of the furnace body 10 in real time; when the negative pressure at both ends of the furnace body 10 in the furnace body 10 is lowered, compressed air is supplied into the sealing member 20. When the air leakage phenomenon occurs, because the air leakage positions are provided with the positions of the sealing parts 20 at the two ends of the furnace body 10, the negative pressure change in the furnace body 10 also occurs at the two ends of the furnace body 10 at first, therefore, when the negative pressure in the furnace body 10 is monitored in real time, the specific positions to be monitored can be the two ends of the furnace body 10, and the negative pressure change and the air leakage phenomenon can be monitored more timely by detecting the negative pressure at the two ends of the furnace body 10.
In some embodiments, as shown in fig. 4, a negative pressure control device may be provided on the rotary calciner to control the negative pressure within the calciner body. Specifically, the negative pressure control means includes a pressure sensor 51 and a controller 54, and the pressure sensor 51 may be disposed at both ends of the furnace body 10, for example, the pressure sensors 51 are disposed on the furnace head 11 and the furnace tail 12 for monitoring the pressure at both ends of the furnace body 10 in real time. The pressure sensor 51 is in communication connection with the controller 54, so that pressure data monitored by the pressure sensor 51 in real time is transmitted to the controller 54, and the controller 54 can process the pressure data and judge whether the pressure in the furnace body 10 is reduced according to the processing result, so as to facilitate subsequent operations.
As shown in fig. 3, in some embodiments, an inlet pipe 30 is disposed on the sealing member 20, and the inlet pipe 30 is communicated with the furnace body 10. The pressure control method in the present embodiment further includes: compressed air is supplied into the seal 20 via the inlet line 30. To facilitate the supply of compressed air into the sealing element 20, an air inlet tube 30 may be provided on the sealing element 20, the air inlet tube 30 being conveniently connectable to an external device. The gas inlet pipe 30 can communicate with the gap between the sealing member 20 and the furnace body 10 and communicate with the inside of the furnace body 10 through the gap between the sealing member 20 and the furnace body 10. Compressed air can be supplied into the sealing member 20 through the air inlet pipe 30, and the compressed air can enter the furnace body 10 through the gap between the sealing member 20 and the furnace body 10.
Specifically, as shown in fig. 4, the negative pressure control device further includes an air compressor 52, the intake pipe 30 may be connected to the air compressor 52, and the air compressor 52 may be further communicatively connected to a controller 54. When the controller 54 judges that the negative pressure in the furnace body 10 is decreased based on the real-time transmitted pressure data of the pressure sensor 51, the controller 54 may send a start instruction to the air compressor 52 to control the air compressor to start up, thereby delivering the compressed air to the intake duct 30. In some embodiments, the air compressor 52 may be controlled to deliver a predetermined flow of compressed air to the intake conduit 30.
As shown in fig. 4, air compressors 52 are connected to the sealing members 20 at both ends of the furnace body 10. In the present embodiment, when it is detected that the negative pressure at the burner 11 is decreased, which indicates that the seal 20 at that location is leaking, the air compressor 52 controlling the connection of the seal 20 at the burner 11 delivers compressed air to the seal 20 at the side of the burner 11. Similarly, when a decrease in negative pressure at the furnace tail 12 is detected, indicating that the seal 20 at that location is leaking, the air compressor 52 connected to the seal 20 at the furnace tail 12 is controlled to supply compressed air to the seal 20 at that side of the furnace tail 12.
In some embodiments, after the negative pressure in the furnace body 10 is reduced and the compressed air starts to be supplied into the sealing member 20, the pressure control method further comprises: monitoring the negative pressure in the furnace body 10 in real time; the pressure and flow rate of the compressed air are adjusted according to the negative pressure value in the furnace body 10. When compressed air is conveyed into the sealing element 20, if the pressure or flow of the compressed air is too large, the excessive compressed air enters the furnace body 10 instead, and the negative pressure of the furnace body 10 is reduced; if the pressure or flow rate of the compressed air is too small, it is not favorable to form a gas barrier, and the effect of preventing the gas product in the furnace body 10 from leaking is deteriorated. For different negative pressure values, the corresponding suitable pressure and flow of the compressed air are different, so in the embodiment of the invention, the negative pressure in the furnace body 10 is monitored in real time, and the pressure and flow of the compressed air are adjusted according to the negative pressure value in the furnace body 10, so that the negative pressure in the furnace body 10 is kept stable. It should be noted that, in the present embodiment, the negative pressure is kept stable, which means that the negative pressure fluctuates within a certain range.
Specifically, as shown in fig. 4, the negative pressure control device further includes a pressure reducing valve 53 provided between the air compressor 52 and the intake pipe 30, and the pressure of the compressed air supplied to the seal 20 can be adjusted by adjusting the pressure reducing valve 53. In some embodiments, the pressure reducing valve 53 may be in communication with the controller 54, and when the controller 54 judges that the pressure in the furnace body 10 is reduced according to the pressure data of the pressure sensor 51, the controller 54 controls the pressure reducing valve 53 to adjust the pressure of the compressed air.
Further, the negative pressure control device includes a flow meter (not shown) that can measure the flow rate of the compressed air delivered to the seal 20 in real time, and a throttle valve 55 that can be used to adjust the flow rate of the compressed air, which are provided between the air compressor 52 and the intake pipe 30. In some embodiments, the flow meter may be communicatively coupled to controller 54, as controller 54 may obtain flow data from the flow meter to monitor the flow of compressed air delivered to seal 20 in real time. Meanwhile, the throttle valve 55 is also connected in communication with the controller 54, and the controller 54 can feed back and adjust the throttle valve 55 according to the pressure in the furnace body 10 and the flow rate monitored in real time to adjust the flow rate of the compressed air.
By adopting the pressure control method of the rotary calcining furnace in the embodiment of the invention, the negative pressure in the furnace body can be adjusted in time in the actual radioactive waste liquid treatment process, and the normal operation of the process is ensured.
In some embodiments, the pressure control method further comprises: and setting a negative pressure alarm threshold, and giving an alarm prompt and conveying compressed air into the sealing part 20 when the negative pressure in the furnace body 10 is reduced to the alarm threshold. By setting the negative pressure alarm threshold, once the negative pressure in the furnace body 10 is reduced to the alarm threshold, an alarm prompt can be automatically sent out, and an operator can be reminded in time; meanwhile, the air compressor is automatically started to deliver compressed air with preset pressure and flow into the sealing element 20, so that the negative pressure in the furnace body 10 is prevented from continuously decreasing.
Specifically, an alarm threshold may be entered within the controller 54 to set the alarm threshold. The negative pressure control device may also include an alarm system in communication with the controller 54. The controller 54 may compare the currently monitored negative pressure to an alarm threshold, and when the negative pressure drops below the alarm threshold, the controller 54 may control the alarm system to alarm and prompt the operator.
In some embodiments, the negative pressure alarm threshold comprises a multi-level alarm threshold. Illustratively, the multi-level alarm thresholds may include a primary alarm threshold, a secondary alarm threshold, a tertiary alarm threshold, and the like. In some embodiments, each of the alarm thresholds may correspond to a predetermined negative pressure, and the negative pressures corresponding to the alarm thresholds may decrease as the levels of the alarm thresholds increase, for example, the primary alarm threshold may be-300 Pa, the secondary alarm threshold may be-200 Pa, and the tertiary alarm threshold may be-100 Pa. According to different damage degrees of the sealing element 20, the leakage degree of the gas can be different, and by setting multiple levels of alarm thresholds, different alarm thresholds can be used for alarming according to the leakage degree of the gas and corresponding treatment measures can be executed.
In some embodiments, when the negative pressure in the furnace body 10 is reduced to the primary alarm threshold, an alarm is given and compressed air starts to be delivered into the sealing member 20, so that the negative pressure in the furnace is kept stable, that is, the negative pressure is maintained at the current negative pressure value and is not continuously reduced; and simultaneously, increasing the negative pressure alarm threshold value to a secondary alarm threshold value. When the negative pressure in the furnace body 10 is reduced to the primary alarm threshold, the leakage degree of the gas is low, the rotary calcining furnace can still normally work for a period of time under the action of the compressed air, at the moment, the negative pressure in the furnace body 10 is not higher than the primary alarm threshold, and after the negative pressure alarm threshold is increased to the secondary alarm threshold, the continuous alarm of an alarm system can be prevented.
In some embodiments, when the negative pressure in the furnace body 10 continues to decrease to the secondary alarm threshold, an alarm prompt is given and the flow rate and/or pressure of the compressed air is adjusted, so that the negative pressure in the furnace remains stable and does not continue to decrease; and simultaneously, increasing the negative pressure alarm threshold to a third-level alarm threshold. When the negative pressure in the furnace body 10 is continuously reduced to the secondary alarm threshold value, the gas leakage degree at the moment is larger than the gas leakage degree when the negative pressure in the furnace body 10 is reduced to the primary alarm threshold value. In order for the rotary calciner to work properly, the flow and/or pressure of the compressed air needs to be regulated. After the flow and/or the pressure of the compressed air are adjusted, the rotary calcining furnace can also work normally for a period of time, at the moment, the negative pressure in the furnace body 10 is not higher than the secondary alarm threshold value, and after the negative pressure alarm threshold value is increased to the secondary alarm threshold value, the alarm system can be prevented from continuously giving an alarm.
In some embodiments, when the negative pressure in the furnace body 10 continues to decrease to the third level alarm threshold, an alarm prompt is given, and the flow rate and/or pressure of the compressed air is adjusted to stabilize the negative pressure in the furnace. When the negative pressure in the furnace body 10 is continuously reduced to the third level alarm threshold value, the gas leakage degree at the moment is larger than the gas leakage degree when the negative pressure in the furnace body 10 is reduced to the second level alarm threshold value. When the negative pressure in the furnace body 10 continues to decrease to the third-level alarm threshold, it may be considered that the performance of the sealing element 20 cannot continue to enable the rotary calciner to normally operate, but in order to enable the rotary calciner to smoothly complete the task, the flow rate and/or pressure of the compressed air needs to be adjusted, so that the negative pressure in the furnace body 10 does not continue to decrease.
In the embodiment of the invention, by setting the multi-level alarm threshold, the performance of the sealing element 20 is reduced when the alarm system gives an alarm once, so that the operation applicability of the sealing element 20 can be pre-warned.
In some embodiments, when the negative pressure in the furnace body 10 decreases to a third level alarm threshold, a seal 20 replacement message is prompted, and after the rotary calciner operation is completed, the seal 20 is replaced. Specifically, a display may be provided on the controller 54 to display the replacement information of the sealing element 20, so as to indicate that the sealing element 20 cannot be used any longer after the alarm threshold reaches the upper limit, and prompt the operator to replace the sealing element 20 in time. This embodiment is passed through early warning sealing member 20 and need be changed, can guarantee equipment safe operation.
In some embodiments, adjusting the flow and/or pressure of the compressed air comprises: the flow and/or pressure of the compressed air is increased. Within a certain range, by increasing the flow rate and/or pressure of the compressed air, the negative pressure in the furnace body 10 can be maintained when the leakage degree of the gas is large, and harmful gas products can be prevented from escaping to the external environment.
For the embodiments of the present application, it should also be noted that, in a case of no conflict, the embodiments of the present application and features of the embodiments may be combined with each other to obtain a new embodiment.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (11)
1. The pressure control method in the rotary calcining furnace is characterized in that the rotary calcining furnace comprises a furnace body, a sealing element and a tail gas pipe communicated with the furnace body, wherein an air extraction device is arranged on the tail gas pipe; the sealing pieces are sleeved at two ends of the furnace body in a sealing manner, and the furnace body can rotate relative to the sealing pieces;
the method comprises the following steps:
when the rotary calcining furnace starts to operate, starting the air extracting device, adjusting the pressure in the furnace body to negative pressure, and maintaining the negative pressure in the furnace body within a preset operation range;
monitoring the negative pressure in the furnace body in real time;
and when the negative pressure in the furnace body is reduced, continuously conveying compressed air into the sealing element so as to maintain the negative pressure in the furnace at the current negative pressure value.
2. The method of claim 1, wherein said monitoring negative pressure in said furnace in real time and continuing to deliver compressed air into said seal when negative pressure in said furnace decreases comprises:
monitoring negative pressure at two ends of the furnace body in real time;
and when the negative pressure at the two ends of the furnace body in the furnace body is reduced, compressed air is conveyed into the sealing piece.
3. The method according to claim 2, wherein an air inlet pipe is arranged on the sealing element and is communicated with the furnace body; the method further comprises the following steps:
compressed air is delivered into the seal through the inlet pipe.
4. The method of claim 1, wherein after the negative pressure in the furnace is reduced and delivery of compressed air into the seal is initiated, the method further comprises:
monitoring the negative pressure in the furnace body in real time;
and adjusting the pressure and flow of the compressed air according to the negative pressure value in the furnace body.
5. The method of claim 1, further comprising:
setting a negative pressure alarm threshold value;
and when the negative pressure in the furnace body is reduced to an alarm threshold value, giving an alarm prompt and conveying compressed air into the sealing element.
6. The method of claim 5, wherein the negative pressure alarm threshold comprises a multi-level alarm threshold.
7. The method of claim 6,
when the negative pressure in the furnace body is reduced to a primary alarm threshold value, giving an alarm prompt and starting to convey compressed air into the sealing element so as to keep the negative pressure in the furnace stable;
and simultaneously, increasing the negative pressure alarm threshold value to a secondary alarm threshold value.
8. The method of claim 7,
when the negative pressure in the furnace body is continuously reduced to a secondary alarm threshold value, giving an alarm prompt and adjusting the flow and/or pressure of the compressed air so as to keep the negative pressure in the furnace stable;
and simultaneously, the negative pressure alarm threshold value is increased to a third-level alarm threshold value.
9. The method of claim 8,
and when the negative pressure in the furnace body is continuously reduced to a third-level alarm threshold value, giving an alarm prompt, and adjusting the flow and/or pressure of the compressed air so as to keep the negative pressure in the furnace stable.
10. The method of claim 8 or 9, wherein said adjusting the flow and/or pressure of said compressed air comprises: increasing the flow and/or pressure of the compressed air.
11. The method of claim 9, further comprising:
when the negative pressure in the furnace body is reduced to a third-level alarm threshold value, prompting the information of replacing the sealing element;
and after the operation of the rotary calcining furnace is finished, replacing the sealing element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211404606.2A CN115682711A (en) | 2022-11-10 | 2022-11-10 | Pressure control method in rotary calcining furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211404606.2A CN115682711A (en) | 2022-11-10 | 2022-11-10 | Pressure control method in rotary calcining furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115682711A true CN115682711A (en) | 2023-02-03 |
Family
ID=85052432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211404606.2A Pending CN115682711A (en) | 2022-11-10 | 2022-11-10 | Pressure control method in rotary calcining furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115682711A (en) |
-
2022
- 2022-11-10 CN CN202211404606.2A patent/CN115682711A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1628912A (en) | Method and apparatus for monitoring system integrity in gas conditioning applications | |
| CN110669911B (en) | Operating method of telescopic labyrinth isolation nitrogen interlocking control system of hot galvanizing vertical annealing furnace | |
| CN206847463U (en) | A kind of heat storage can control system | |
| CN110513140A (en) | A kind of control system and method promoting the efficient mash gas extraction of coal seam network security | |
| CN115682711A (en) | Pressure control method in rotary calcining furnace | |
| CN109813094A (en) | A kind of alloy material multiple-effect quick baking preheating device and its application method | |
| CN104006005B (en) | Turbocompressor on-line cleaning device and turbocompressor on-line cleaning method | |
| WO2010128400A2 (en) | Apparatus and method for balanced removal of gasses for electrolysis cells by suction | |
| CN102425976B (en) | Automatic temperature regulating method of high-temperature flue gas for metal heat exchanger | |
| CN103908848A (en) | Gas dedusting and purifying method and system | |
| CN213577715U (en) | Air compressor machine waste heat heating system | |
| CN210804125U (en) | Static pressure type liquid level control system | |
| CN210645865U (en) | Denitration system in boiler urea stove | |
| KR101419880B1 (en) | Apparatus for manufacturing wire rod having gas booster | |
| CN206637228U (en) | Oil-gas lubricating device | |
| CN218065458U (en) | Water supply system and mining equipment | |
| CN106566918A (en) | A dual-fuel on-line switching monitoring system for a continuous acid-washing annealing furnace | |
| CN105714007A (en) | Compressing fan oxygen supply device and blast-furnace smelting system using oxygen supply device | |
| CN211370663U (en) | Oil supply device for compressor equipment | |
| CN112303627B (en) | Gas distribution system and method | |
| KR101427217B1 (en) | Circulation water supplying and draining system for waste gas purification | |
| CN217712852U (en) | Air separation continuous stable operation common and standby air compressor switching system | |
| CN206716026U (en) | A kind of wheat flour milling workshop water control system | |
| CN209155459U (en) | A kind of dehydrogenated tail gas processing unit | |
| CN205313361U (en) | Stifled, discharge apparatus suitable for glass platinum passageway discharge opening |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |