CN115046386B - Rotary solid material calcining device - Google Patents
Rotary solid material calcining device Download PDFInfo
- Publication number
- CN115046386B CN115046386B CN202210964462.XA CN202210964462A CN115046386B CN 115046386 B CN115046386 B CN 115046386B CN 202210964462 A CN202210964462 A CN 202210964462A CN 115046386 B CN115046386 B CN 115046386B
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- Prior art keywords
- kiln body
- zone
- flame path
- calcining
- cooling
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/02—Rotary-drum furnaces, i.e. horizontal or slightly inclined of multiple-chamber or multiple-drum type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/14—Rotary-drum furnaces, i.e. horizontal or slightly inclined with means for agitating or moving the charge
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
- F27B7/22—Rotary drums; Supports therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
- F27B7/32—Arrangement of devices for charging
- F27B7/3205—Charging
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
- F27B7/34—Arrangements of heating devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
- F27B7/38—Arrangements of cooling devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
- F27B7/42—Arrangement of controlling, monitoring, alarm or like devices
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
Abstract
The invention discloses a rotary solid material calcining device, which aims at solving the problems of excessive burning loss and low actual yield of carbon when petroleum coke is calcined by the conventional rotary kiln, and belongs to the technical field of calcining devices. The technical scheme is as follows: the device comprises an obliquely arranged kiln body, wherein a feed inlet of the kiln body is connected with a feed pipe through a bearing; a preheating zone, a calcining zone and a cooling zone are sequentially arranged in the kiln body along the material moving direction, flame paths are circumferentially arranged in the preheating zone and the calcining zone in the kiln body, the inlet of each flame path is communicated with the cooling zone, and the outlet of each flame path is positioned at the feed end of the kiln body; an air channel is arranged in the kiln body in the circumferential direction of the cooling area, one end of the air channel is connected with the air blower, and the other end of the air channel is communicated with the flame path. The invention completes the whole process calcination of the material by indirect heating and indirect cooling, can reduce the burning loss rate of the carbon and improve the actual yield.
Description
Technical Field
The invention relates to the technical field of calcining devices, in particular to a rotary solid material calcining device.
Background
Calcined petroleum coke is used as a main raw material for producing carbon products (such as graphite, carbon electrodes and prebaked anodes), and is widely applied to the carbon industry. Before batching, the petroleum coke needs to be calcined at high temperature, and the water and volatile matters in the petroleum coke are removed through calcination, so that the density, mechanical strength, electric conductivity, chemical stability and the like of the petroleum coke can be improved. The calcining of petroleum coke is generally carried out by adopting equipment such as rotary kilns, tank furnaces, rotary beds and the like in China. The rotary kiln has the advantages of continuous production, low cost, high capacity, easy operation and regulation, and the like, and is a calcining device widely adopted at home and abroad at present. However, when the rotary kiln is used for calcining petroleum coke (containing needle coke), because the materials in the kiln are directly heated, a great amount of fine petroleum coke powder in a calcining area is oxidized, so that the burning loss of carbon is overlarge, and the actual yield is low.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the rotary type solid material calcining device overcomes the defects of the prior art, is based on the actual condition of domestic production of calcined petroleum coke and needle coke, utilizes the structure of the original rotary kiln and auxiliary facilities to the maximum extent, completes the whole process calcination of the material in the modes of indirect heating and indirect cooling, can reduce the burning loss rate of the carbon and improve the actual yield.
The technical scheme of the invention is as follows:
the rotary solid material calcining device comprises an obliquely arranged kiln body, wherein a feed inlet of the kiln body is connected with a feed pipe through a bearing; a preheating zone, a calcining zone and a cooling zone are sequentially arranged in the kiln body along the material moving direction, flame paths are circumferentially arranged in the preheating zone and the calcining zone in the kiln body, the flame path inlet is communicated with the cooling zone, and the flame path outlet is positioned at the feed end of the kiln body; an air channel is arranged in the kiln body in the circumferential direction of the cooling area, one end of the air channel is connected with the air blower, and the other end of the air channel is communicated with the flame path.
Preferably, a sealing ring is further arranged between the feeding pipe and the bearing.
Preferably, the sealing ring is made of ceramic or carbon materials.
Preferably, the feed end of the kiln body is provided with an outer cover, the feed pipe extends out of the outer cover, the flame path outlet is communicated with the outer cover, and the outer cover is provided with a flue gas outlet.
Preferably, the kiln body is further provided with a cold air inlet, and the cold air inlet is communicated with the flame path.
Preferably, the cross-sectional shapes of the flame path and the air path are circular, oval or polygonal.
Compared with the prior art, the invention has the following beneficial effects:
the invention does not change the process configuration and the main structure of the original rotary kiln and the auxiliary facilities, only optimizes the internal layout of the rotary kiln, arranges a flame path and an air path in the kiln body according to the process system of calcining petroleum coke (containing needle coke), reasonably connects all the paths together, sequentially forms a preheating zone, a calcining zone and a cooling zone in the kiln to form a set of complete heating system, completes the whole process calcination of materials by indirect heating and indirect cooling, can reduce the carbon burning loss rate and improve the actual yield. The calcining device provided by the invention has the advantages of obviously reduced production cost, small modification work amount, short construction period and small investment, and is extremely suitable for producing calcined petroleum coke (containing needle coke) and other solid materials needing to finish the calcining process in a reducing atmosphere by adopting a rotary kiln.
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.
Fig. 1 is a schematic structural view of the present invention.
In the figure, 1-kiln body, 2-bearing, 3-feeding pipe, 4-preheating zone, 5-calcining zone, 6-cooling zone, 7-flame path, 8-air path, 9-outer cover, 10-smoke outlet, 11-cold air inlet and 12-material.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments.
Example 1
As shown in fig. 1, the embodiment provides a rotary solid material calcining device, which includes an obliquely arranged kiln body 1, wherein a feed inlet of the kiln body 1 is connected with a feed pipe 3 through a bearing 2; a preheating zone 4, a calcining zone 5 and a cooling zone 6 are sequentially arranged in the kiln body 1 along the moving direction of the material 12, and no obvious boundary exists among the zones; a flame path 7 is circumferentially arranged in the preheating zone 4 and the calcining zone 5 in the kiln body 1, the inlet of the flame path 7 is communicated with the cooling zone 6, and the outlet of the flame path 7 is positioned at the feed end of the kiln body 1; an air channel 8 is arranged in the kiln body 1 in the circumferential direction of the cooling area 6, one end of the air channel 8 is connected with the air blower, and the other end of the air channel is communicated with the flame path 7. The flame path 7 and the air path 8 can be cast or prefabricated in situ by adopting casting materials, and can also be of a refractory brick masonry structure, flame path holes or air path holes are arranged in refractory bricks, and the appearance of the refractory bricks is in a wedge-shaped structural form with snap fasteners or other fasteners; the cross-sectional shapes of the flame path 7 and the air path 8 may be circular, oval or polygonal (e.g., rectangular, trapezoidal, etc.). The driving manner of the kiln body 1 of the present embodiment is the same as the driving manner of the existing kiln body, and is not described herein again.
The working principle is as follows:
when the kiln body 1 is started, the kiln body 1 is heated by external fuel, after the heating is carried out to a certain temperature, the heating is stopped, then the solid material 12 enters the preheating zone 4 of the kiln body 1 through the feeding pipe 3, and the material 12 moves towards the discharging end of the kiln body 1 along with the rotation of the inclined kiln body 1. The material 12 at the end of the preheating zone 4 is heated to about 500 ℃ and escapes a large amount of volatile matters, and the volatile matters enter the flame path 7 through the inlet of the flame path 7 under the action of negative pressure. Wherein the formation of the negative pressure in the kiln body 1 can be realized by adopting the formation mode of the negative pressure of the existing kiln body, which is not described again. External cold air enters through the air channel 8 through the air blower, on one hand, the cold air exchanges heat with the materials 12 in the cooling area 6 to cool the materials 12 moving to the cooling area 6, and then the preheated hot air enters the flame path 7 through the outlet of the air channel 8; on the other hand, the volatile matter is mixed with the preheated hot air and then is completely combusted in the flame path 7, and the heat generated by combustion indirectly heats the materials 12 in the calcining zone 5 and the preheating zone 4 through the wall of the flame path 7. The heated material continues to move towards the discharging end of the kiln body 1, the cooling process from high temperature to low temperature is completed in the cooling zone 6, and the material 12 after primary cooling is discharged from the discharging port of the kiln body 1 and enters the subsequent working section. In addition, the heating temperature in the kiln body 1 can be adjusted by the amount of the introduced cold air. The device of this embodiment has formed a set of complete solid material indirect heating system and indirect cooling system, optimizes air pipeline and heating channel simultaneously, realizes the accurate control to the calcination operating mode through reasonable air feed and unloading, reaches the purpose that obtains no oxidation or few oxidation petroleum coke (containing needle coke), can reduce the burning loss rate of charcoal matter, improves the actual yield.
In addition, imager or kiln body temperature scanning system in the device mountable kiln of this embodiment, operating mode and temperature distribution condition in the whole kiln of control realize temperature, pressure and the automatically regulated of row's material volume. The in-kiln imager or the kiln body temperature scanning system are existing kiln body corollary equipment, and the specific structure, installation mode and installation position are not described herein again.
Example 2
On the basis of the embodiment 1, a sealing ring is arranged between the feeding pipe 3 and the bearing 2. The material of the sealing ring can adopt ceramic or carbon (such as graphite) and the like. The sealing ring ensures that the sliding clearance between the feed inlet of the kiln body 1 and the feed pipe 3 has good sealing performance in the relative rotation process of the feed inlet and the feed pipe.
Example 3
On the basis of embodiment 1, the feed end of the kiln body 1 is provided with an outer cover 9, the feed pipe 3 extends out of the outer cover 9, the outlet of the flame path 7 is communicated with the outer cover 9, and the outer cover 9 is provided with a flue gas outlet 10. Flue gas generated by combustion in the flue 7 is discharged through an outlet of the flue 7, enters the outer cover 9, and enters a subsequent waste heat utilization section through a flue gas outlet 10.
Example 4
On the basis of the embodiment 1, the kiln body 1 is also provided with a cold air inlet 11, and the cold air inlet 11 is communicated with the flame path 7. The cold air entering from the cold air inlet 11 can be used for burning the volatile matters in the flame path 7 and providing heat for the calcining zone 5 and the preheating zone 4 on the one hand, and the temperature of the flame path 7 can be rapidly adjusted through the entering amount of the part of the cold air on the other hand.
Claims (6)
1. The rotary solid material calcining device is characterized by comprising an obliquely arranged kiln body (1), wherein a feed inlet of the kiln body (1) is connected with a feed pipe (3) through a bearing (2); a preheating zone (4), a calcining zone (5) and a cooling zone (6) are sequentially arranged in the kiln body (1) along the moving direction of the materials (12), flame paths (7) are circumferentially arranged in the preheating zone (4) and the calcining zone (5) in the kiln body (1), the inlet of each flame path (7) is communicated with the cooling zone (6), and the outlet of each flame path (7) is positioned at the feed end of the kiln body (1); an air channel (8) is arranged in the kiln body (1) in the circumferential direction of the cooling area (6), one end of the air channel (8) is connected with a blower, and the other end of the air channel (8) is communicated with a flame path (7);
when the kiln body (1) is started, firstly heating the kiln body (1) by adding fuel, stopping heating after heating to a certain temperature, then enabling solid materials (12) to enter a preheating area (4) of the kiln body (1) through a feeding pipe (3), and moving the materials (12) towards the discharging end direction of the kiln body (1) along with the rotation of the inclined kiln body (1); the material (12) at the tail end of the preheating zone (4) is heated to about 500 ℃, a large amount of volatile matters escape, and the volatile matters enter the flame path (7) through the inlet of the flame path (7) under the action of negative pressure; external cold air enters through the air channel (8) through the air blower, on one hand, the cold air exchanges heat with the material (12) in the cooling area (6) to cool the material (12) moving to the cooling area (6), and then the preheated hot air enters the flame path (7) through the outlet of the air channel (8); on the other hand, the volatile matter is mixed with the preheated hot air and then is completely combusted in the flame path (7), and the heat generated by combustion indirectly heats the materials (12) in the calcining zone (5) and the preheating zone (4) through the wall of the flame path (7); the heated material continues to move towards the direction of the discharging end of the kiln body (1), the cooling process from high temperature to low temperature is completed in the cooling zone (6), and the material (12) after primary cooling enters the subsequent working section after being discharged from the discharging port of the kiln body (1).
2. The rotary solid material calcining device as claimed in claim 1, characterized in that a sealing ring is further arranged between the feeding pipe (3) and the bearing (2).
3. The rotary solid calciner apparatus of claim 2 wherein the seal ring is made of ceramic or carbon material.
4. The rotary calcining device for solid materials in claim 1, characterized in that the feeding end of the kiln body (1) is provided with an outer cover (9), the feeding pipe (3) extends out of the outer cover (9), the outlet of the flame path (7) is communicated with the outer cover (9), and the outer cover (9) is provided with a smoke outlet (10).
5. The rotary solid material calcining device as claimed in claim 1, wherein the kiln body (1) is further provided with a cold air inlet (11), and the cold air inlet (11) is communicated with the flame path (7).
6. The rotary solid material calcining device as claimed in claim 1, characterized in that the cross-sectional shape of the flame path (7) and the air path (8) is circular, elliptical or polygonal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210964462.XA CN115046386B (en) | 2022-08-12 | 2022-08-12 | Rotary solid material calcining device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210964462.XA CN115046386B (en) | 2022-08-12 | 2022-08-12 | Rotary solid material calcining device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115046386A CN115046386A (en) | 2022-09-13 |
| CN115046386B true CN115046386B (en) | 2022-11-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210964462.XA Active CN115046386B (en) | 2022-08-12 | 2022-08-12 | Rotary solid material calcining device |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB696095A (en) * | 1951-04-06 | 1953-08-26 | John Baptiste Dube | Calcining kiln |
| CN109631569A (en) * | 2018-12-10 | 2019-04-16 | 贵州仙劲锌业有限公司 | A kind of environmentally friendly smelting rotary kiln handling the cadmium of lead containing zinc-iron dangerous waste material |
| CN210922159U (en) * | 2019-10-15 | 2020-07-03 | 宁夏洪腾科技开发有限公司 | High-efficient coal calcining system for clean production |
| CN213238394U (en) * | 2020-09-30 | 2021-05-18 | 河南鸿润窑炉建造有限公司 | Hot air secondary utilization device of rotary kiln |
| CN113357641A (en) * | 2020-03-05 | 2021-09-07 | 昱源宁海环保科技股份有限公司 | Energy-saving waste-reducing flue gas recirculation jacket rotary kiln and application thereof |
| CN113719835A (en) * | 2021-08-19 | 2021-11-30 | 福建省世能科泰节能设备有限公司 | Multichannel rotary kiln combustor with directional oxygen enrichment combustion supporting function |
-
2022
- 2022-08-12 CN CN202210964462.XA patent/CN115046386B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB696095A (en) * | 1951-04-06 | 1953-08-26 | John Baptiste Dube | Calcining kiln |
| CN109631569A (en) * | 2018-12-10 | 2019-04-16 | 贵州仙劲锌业有限公司 | A kind of environmentally friendly smelting rotary kiln handling the cadmium of lead containing zinc-iron dangerous waste material |
| CN210922159U (en) * | 2019-10-15 | 2020-07-03 | 宁夏洪腾科技开发有限公司 | High-efficient coal calcining system for clean production |
| CN113357641A (en) * | 2020-03-05 | 2021-09-07 | 昱源宁海环保科技股份有限公司 | Energy-saving waste-reducing flue gas recirculation jacket rotary kiln and application thereof |
| CN213238394U (en) * | 2020-09-30 | 2021-05-18 | 河南鸿润窑炉建造有限公司 | Hot air secondary utilization device of rotary kiln |
| CN113719835A (en) * | 2021-08-19 | 2021-11-30 | 福建省世能科泰节能设备有限公司 | Multichannel rotary kiln combustor with directional oxygen enrichment combustion supporting function |
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| Publication number | Publication date |
|---|---|
| CN115046386A (en) | 2022-09-13 |
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