CN217809580U - Heat treatment system for drying cylinder - Google Patents
Heat treatment system for drying cylinder Download PDFInfo
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- CN217809580U CN217809580U CN202221967974.3U CN202221967974U CN217809580U CN 217809580 U CN217809580 U CN 217809580U CN 202221967974 U CN202221967974 U CN 202221967974U CN 217809580 U CN217809580 U CN 217809580U
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Abstract
The utility model provides a drying cylinder heat treatment system, which is used in the technical field of heat treatment, wherein a drying cylinder is supported by a supporting mechanism, the drying cylinder is provided with supporting and positioning functions, air cylinders of a burner and a ventilation mechanism extend into the drying cylinder, the burner is connected with a gas source and is used for inputting gas into the drying cylinder, the air cylinder of the ventilation mechanism conveys air into the drying cylinder, the gas and the air are mixed in the drying cylinder to realize combustion, and the interior of the drying cylinder is heated to realize annealing; the electric heating cable is arranged at the position of a welding line on the surface of the drying cylinder, and heating annealing is performed on the key point of the welding line. The utility model discloses a dryer heat treatment system heats the inside of dryer and realizes annealing, need not adopt complicated main equipment to eliminate the dryer with low costs because of the stress that the welding produced.
Description
Technical Field
The utility model relates to a heat treatment technical field further relates to a dryer heat treatment system.
Background
The drying cylinder is a large-scale pressure device, the diameter is 3m to 6.7m, and the cylinder surface width is 2.8m to 6.2m. The cylinder body of the drying cylinder is a welding part, and due to the limitation of the size of the plate surface, the drying cylinder is provided with a plurality of welding seams along the circumferential direction and the cylinder surface direction. Welding can cause stress on the cylinder body, and large-scale heat treatment equipment is needed for annealing the drying cylinder in order to eliminate the welding stress, and is expensive.
For those skilled in the art, how to eliminate the stress generated by the welding of the drying cylinder at low cost is a technical problem to be solved at present.
SUMMERY OF THE UTILITY MODEL
The utility model provides a dryer heat treatment system heats in the inside of dryer and realizes annealing, eliminates the dryer because of the stress that the welding produced with low costs, and concrete scheme is as follows:
a heat treatment system for a drying cylinder comprises a supporting mechanism, a burner, an electric heating cable and a ventilation mechanism, wherein the supporting mechanism is used for supporting the drying cylinder, an air cylinder of the burner and an air cylinder of the ventilation mechanism extend into the drying cylinder, and the electric heating cable is arranged at the position of a welding line on the surface of the drying cylinder;
the combustor is connected with a gas source and is used for inputting gas into the drying cylinder; the ventilation mechanism is used for inputting air into the drying cylinder, and the fuel gas and the air are mixed in the drying cylinder to realize combustion.
Optionally, the air duct is inserted upwards from the bottom of the drying cylinder, and the burner comprises a plurality of pipes, each pipe circumferentially surrounding the air duct.
Optionally, the top surface of the drying cylinder is provided with a chimney for exhausting flue gas.
Optionally, the inner wall of the cylinder is provided with several thermocouples for detecting the temperature.
Optionally, the thermocouples are evenly distributed in at least three rows in the circumferential direction.
Optionally, each of the thermocouples in each column is installed at a quartering point of a height position.
Optionally, the ventilation mechanism further comprises an air duct support and a fan, the air duct support is used for fixedly supporting the air duct, and the fan conveys air to the air duct through the air duct support.
Optionally, the gas source comprises a liquefied gas tank and a gasification skid, and the gasification skid is connected to the combustor through a pipeline which is independently controlled to be switched on and switched off.
Optionally, the outer surface of the drying cylinder is covered with a heat-insulating felt.
Optionally, the burner is further provided with an igniter.
The utility model provides a drying cylinder heat treatment system, which supports a drying cylinder by a supporting mechanism, provides bearing and positioning for the drying cylinder, a burner and an air cylinder of a ventilation mechanism extend into the drying cylinder, the burner is connected with a gas source and used for inputting gas into the drying cylinder, the air cylinder of the ventilation mechanism conveys air to the drying cylinder, the gas and the air are mixed in the drying cylinder to realize combustion, and the interior of the drying cylinder is heated to realize annealing; the electric heating cable is arranged at the position of a welding line on the surface of the drying cylinder, and heating annealing is performed on the key point of the welding line. The utility model discloses a dryer heat treatment system heats the inside of dryer and realizes annealing, need not adopt complicated main equipment to eliminate the dryer with low costs because of the stress that the welding produced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a general schematic view of one embodiment of a dryer heat treatment system provided by the present invention;
FIG. 2 is a diagram showing the relationship between temperature and time in the post-weld heat treatment process of the drying cylinder body.
The drawing comprises the following steps:
the device comprises a supporting mechanism 1, a combustor 2, an igniter 21, an electric heating cable 3, a ventilation mechanism 4, an air duct 41, an air duct bracket 42, a fan 43, a thermocouple 5, a chimney 6, a gas source 7, a liquefied gas tank 71 and a gasification skid 72.
Detailed Description
The core of the utility model is to provide a drying cylinder heat treatment system, which heats the inside of the drying cylinder to realize annealing treatment and eliminates the stress of the drying cylinder caused by welding with low cost.
In order to make the technical solution of the present invention better understood by those skilled in the art, the heat treatment system of the drying cylinder of the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1, X represents a drying cylinder, which is a large hollow cavity structure; the utility model provides a dryer heat treatment system, including subassemblies such as supporting mechanism 1, combustor 2, electric heat cable 3, ventilation mechanism 4, supporting mechanism 1 is used for supporting the dryer, and supporting mechanism 1 forms the bearing to the dryer from the bottom, makes dryer and ground form the interval.
The combustor 2 and an air duct 41 of the ventilation mechanism 4 extend into the drying cylinder, and the combustor 2 is connected with a gas source 7 and used for inputting gas, such as coal gas, natural gas and the like, into the drying cylinder; the ventilation mechanism 4 is used for inputting air into the drying cylinder, and the fuel gas and the air are mixed in the drying cylinder to realize combustion. After the welding is finished, the inside of the drying cylinder is heated through the fuel gas input by the combustor 2, and the drying cylinder is heated to achieve the purpose of annealing.
The electric heating cable 3 is arranged at the position of a welding seam on the surface of the drying cylinder, the electric heating cable 3 is formed by combining a plurality of cables, the whole electric heating cable 3 has a certain width which is about 100mm wide and completely covers the welding seam; the length direction of the electric heating cable 3 is consistent with the length extending direction of the welding seam. The electric heating cable 3 is used for independently heating the welding seam position, so that the welding seam position can be better annealed. The gas combustion heating and the electric heating are combined with each other, so that the inside of the whole drying cylinder can obtain uniform heating effect, and the condition of insufficient local heating is avoided.
The utility model discloses a dryer heat treatment system heats the inside of dryer and realizes annealing, need not adopt complicated main equipment to eliminate the dryer with low costs because of the stress that the welding produced.
On the basis of the above scheme, the utility model discloses a dryer 41 upwards inserts from the bottom of dryer, and the bottom center of dryer sets up the trompil, and dryer 41 upwards inserts from the bottom center, is connected fixedly through the ring flange between dryer 41 and the dryer, and dryer 41 highly can be less than the height of whole dryer, and the heat upwards gives off, guarantees that upper portion also can obtain heating fully.
The utility model discloses a combustor 2 includes a plurality of pipelines, each pipeline circumference encircles in dryer 41, combine figure 1, heating pipeline's diameter is less than dryer 41's diameter, dryer 41 and pipeline are vertical extension and distribute, set up a plurality of carminative trompils on dryer 41's lateral wall, set up a plurality of carminative trompils on a plurality of pipelines of combustor 2 respectively, the gas is discharged through the trompil respectively with the air, make gas and air obtain fully mixing, thereby realize all around that the all directions burn uniformly.
Specifically, the utility model discloses top surface installation at the dryer is used for the chimney 6 of exhaust flue gas, and flue gas after the burning is outwards discharged from chimney 6. The chimney 6 is arranged at the opening in the center of the top of the drying cylinder, the chimney 6 is in a detachable design, and the chimney 6 can be detached after annealing.
Further, the utility model discloses inner wall at the dryer sets up a plurality of thermocouples 5 that are used for detecting the temperature, detects the temperature of the different positions of dryer inner wall through the thermocouple to in time adjust the temperature of different positions.
Specifically, the utility model provides a thermocouple 5 along at least three rows of circumference evenly distributed, every row contains a plurality of thermocouples 5 respectively, and a plurality of thermocouples of vertical arrangement form one, and a plurality of rows distribute along circumference evenly.
The thermocouples 5 in each row are arranged at the quartering points of the height position, three thermocouples 5 are arranged in each row, and the three thermocouples are respectively positioned at the quartering points, so that uniform distribution and temperature measurement are realized.
With reference to fig. 1, the ventilation mechanism 4 of the present invention further comprises an air duct support 42 and a fan 43, the air duct support 42 fixedly supports the air duct 41, the fan 43 is installed on the air duct support 42, the air duct support 42 is a hollow channel of the inner cavity, the fan 43 conveys air to the air duct 41 through the air duct support 42, and the air supply amount to the drying cylinder is adjusted by controlling the rotation speed of the fan 43.
Referring to fig. 1, the fuel gas source 7 of the present invention includes a liquefied gas tank 71 and a gasification skid 72, wherein the liquefied gas tank 71 stores liquid combustible gas, and the gasification skid 72 converts the liquid combustible gas in the liquefied gas tank 71 into gaseous combustible gas; the gasification sledge 72 is connected to the combustor 2 through a pipeline which is independently controlled to be on and off, and each pipeline is respectively provided with a valve to control the on and off, so that the size of the airflow is adjusted.
Furthermore, the outer surface of the drying cylinder is covered with the heat preservation felt, so that the heat dissipation to the outside is slowed down, and the temperature in the drying cylinder is kept.
The burner 2 is also provided with an igniter 21, only one igniter 21 is needed, and the igniter 21 generates electric sparks at the ignition stage to ignite combustible gas.
The supporting process of the drying cylinder comprises the following steps: the drying cylinder is supported by the supporting mechanism 1, the burner 2 is arranged in a flange hole at the lower part of the drying cylinder and fixed at the bottom of the drying cylinder, the air cylinder 41 is connected with the fan 43, and the top of the drying cylinder is provided with a chimney 6 for exhausting waste gas. The electric heating cable 3 is wound on the circumferential welding seam of the upper part and the lower part of the drying cylinder, and 12 thermocouples are uniformly distributed on the circumference, the middle part and the lower part (4 columns and 3 rows). The circumference of the drying cylinder and the upper and lower surfaces of the drying cylinder are all insulated by heat preservation felts.
Liquefied gas pipeline connection: liquefied gas jar 71 and gasification sled 72 are connected with the special pipe of coal gas, install the ball valve additional in the middle of liquefied gas jar 71 and the gasification sled 72 connecting pipe, and gasification sled 72 passes through the pipeline to be connected with combustor 2, installs control valves such as ball valve, solenoid valve additional on the pipeline.
Controlling the temperature of the drying cylinder: and (4) opening a gas valve, opening a fan and igniting. The drying cylinder starts to be heated, the heating is carried out according to the postweld heat treatment process curve of the cylinder body of the drying cylinder, the thermocouple of the drying cylinder is arranged on the circumference of the four equal parts, the thermocouple 5 is arranged on each equal part, the thermocouple 5 is arranged in the middle and the lower part, the measured feedback temperature is the average value of the three thermocouples, namely the temperature of the drying cylinder has four measured feedback values on the circumference.
When the temperature of the drying cylinder is integrally high, the gas quantity or the air quantity or both the gas quantity and the air quantity are reduced, and when the temperature of the drying cylinder is integrally low, the gas quantity or the air quantity or both the gas quantity and the air quantity are increased.
When the local temperature of the drying cylinder is high, such as the temperature in the area A in figure 1, the gas quantity is reduced or the air quantity is reduced or the gas quantity and the air quantity are simultaneously reduced. When the local temperature of the drying cylinder is low, such as the temperature in the area A is low, the gas quantity or the air quantity or both the gas quantity and the air quantity are increased. The heating temperature of the heat treatment of the drying cylinder is as follows: plus or minus 20 ℃ at 620 ℃. The heat treatment heating temperature difference of the drying cylinder is as follows: less than or equal to 80 ℃.
The heating temperature of the drying cylinder is adjusted by adjusting the gas quantity and the air quantity. And annealing the drying cylinder according to the postweld heat treatment process curve of the drying cylinder body.
With reference to fig. 2, the post-weld heat treatment process of the cylinder body of the drying cylinder of the utility model is carried out according to the following processes:
the heat treatment temperature after welding is 620 +/-20 ℃, and the heat preservation time is 2.5-3h
1. Temperature rise
Before the weldment is heated to 400 ℃, the heating speed is not less than 100 ℃/h at the temperature of more than or equal to 50 ℃/h, and after the weldment is heated to 400 ℃, the heating speed cannot exceed 60 ℃/h. The temperature difference of each temperature measuring point is not more than 100 ℃ during the temperature rise of the weldment.
2. Heat preservation
During the heat preservation of the weldment, the difference between the highest temperature and the lowest temperature in the heating area is not more than 80 ℃.
3. Temperature reduction
When the temperature of the weldment is higher than 400 ℃, the cooling speed of the weldment is not more than 75 ℃/h. And stopping heating and naturally cooling when the temperature of the weldment is lower than 400 ℃.
4. The atmosphere of the heating area should be controlled during the temperature rise and the heat preservation period to prevent the surface of the weldment from being excessively oxidized.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The heat treatment system for the drying cylinder is characterized by comprising a supporting mechanism (1), a burner (2), an electric heating cable (3) and a ventilation mechanism (4), wherein the supporting mechanism (1) is used for supporting the drying cylinder, a wind cylinder (41) of the burner (2) and the ventilation mechanism (4) extends into the drying cylinder, and the electric heating cable (3) is arranged at the position of a welding seam on the surface of the drying cylinder;
the combustor (2) is connected with a gas source (7) and is used for inputting gas into the drying cylinder; the ventilation mechanism (4) is used for inputting air into the drying cylinder, and the fuel gas and the air are mixed in the drying cylinder to realize combustion.
2. The cylinder heat treatment system according to claim 1, characterized in that said air duct (41) is inserted from the bottom of the cylinder upwards, said burner (2) comprising a plurality of ducts, each circumferentially surrounding said air duct (41).
3. The cylinder heat treatment system according to claim 1, characterized in that the top surface of the cylinder is equipped with a chimney (6) for the exhaust gases.
4. The cylinder heat treatment system according to claim 1, characterized in that the inner wall of the cylinder is provided with several thermocouples (5) for detecting the temperature.
5. The cylinder heat treatment system according to claim 4, characterized in that said thermocouples (5) are evenly distributed in at least three rows in the circumferential direction.
6. The cylinder heat treatment system according to claim 5, characterized in that the thermocouples (5) in each row are mounted at the quartering points of the height position.
7. The cylinder heat treatment system according to claim 1, characterized in that said ventilation mechanism (4) further comprises a wind tunnel support (42) and a fan (43), said wind tunnel support (42) fixedly supporting said wind tunnel (41), said fan (43) feeding air to said wind tunnel (41) through said wind tunnel support (42).
8. Cylinder heat treatment system according to claim 1, characterized in that the gas source (7) comprises a liquefied gas tank (71) and a gasification skid (72), the gasification skid (72) being connected to the burner (2) by an independently controlled on-off conduit.
9. The cylinder heat treatment system of claim 1 wherein the outer surface of the cylinder is covered with a thermal blanket.
10. Cylinder heat treatment system according to claim 1, characterized in that the burner (2) is also provided with an igniter (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221967974.3U CN217809580U (en) | 2022-07-28 | 2022-07-28 | Heat treatment system for drying cylinder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221967974.3U CN217809580U (en) | 2022-07-28 | 2022-07-28 | Heat treatment system for drying cylinder |
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| Publication Number | Publication Date |
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| CN217809580U true CN217809580U (en) | 2022-11-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221967974.3U Active CN217809580U (en) | 2022-07-28 | 2022-07-28 | Heat treatment system for drying cylinder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116770041A (en) * | 2023-06-19 | 2023-09-19 | 安徽尚德科技有限公司 | Viscous damper part processing device |
-
2022
- 2022-07-28 CN CN202221967974.3U patent/CN217809580U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116770041A (en) * | 2023-06-19 | 2023-09-19 | 安徽尚德科技有限公司 | Viscous damper part processing device |
| CN116770041B (en) * | 2023-06-19 | 2024-01-30 | 尚德科技(安徽)有限公司 | Viscous damper part processing device |
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