CN212270149U - External heating type vertical rotary kiln - Google Patents
External heating type vertical rotary kiln Download PDFInfo
- Publication number
- CN212270149U CN212270149U CN202020690030.0U CN202020690030U CN212270149U CN 212270149 U CN212270149 U CN 212270149U CN 202020690030 U CN202020690030 U CN 202020690030U CN 212270149 U CN212270149 U CN 212270149U
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- Prior art keywords
- heating furnace
- kiln
- small
- rotary
- heat exchanger
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 68
- 238000005192 partition Methods 0.000 claims abstract description 13
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 238000009413 insulation Methods 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 9
- 238000000034 method Methods 0.000 description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- 239000003638 chemical reducing agent Substances 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 4
- 239000003546 flue gas Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 239000003245 coal Substances 0.000 description 3
- 239000003034 coal gas Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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- Muffle Furnaces And Rotary Kilns (AREA)
Abstract
The utility model relates to an external heating vertical rotary kiln, which comprises a heating furnace, a rotary pipe, a spiral rotating system, a heating system and a heat exchange system; the heating furnace is vertically arranged, a plurality of layers of partition plates are arranged in the heating furnace, the heating furnace is divided into a plurality of independent small kilns along the vertical direction, the rotary pipe is vertically arranged in the heating furnace, and spiral blades are vertically arranged in the rotary pipe; the heating system comprises a burner, a pressurized air pipeline and a gas pipeline, the pressurized air pipeline and the gas pipeline are respectively communicated with the heat exchanger, pressurized air and gas heated by the heat exchanger enter the burner to be combusted, and a plurality of groups of burners are arranged on the side wall of the heating furnace; the heat exchange system comprises a heat exchanger and a gas return pipeline, the heat exchanger is communicated with the gas return pipeline, and a draught fan is arranged at the top end of the gas return pipeline; the utility model discloses area is little, the energy consumption is low, the reduction time is short, friendly to the environment, the utility model relates to a metallurgical equipment technical field.
Description
Technical Field
The utility model relates to a metallurgical equipment technical field, more specifically say, relate to a rotary kiln is erect to external heat type.
Background
The prior art of the direct reduced iron production in China mainly adopts a coal-based tunnel kiln pot-type method, and as coking coal resources are exhausted day by day, blast furnace iron making is stopped, so the direct reduced iron becomes a main method for iron making, the traditional coal-based tunnel kiln pot-type method has the problems of large floor area, high energy consumption, long reduction time, high labor consumption, serious environmental pollution and the like, although China is the first country of the world steel production, the annual output of the direct reduced iron only accounts for about 1 percent of the world total output, a large amount of direct reduced iron needs to be imported every year, and the direct reduced iron produced by the traditional tunnel kiln pot-type process cannot meet the actual demands of the market, so the prior art needs to be improved.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects in the prior art, the external heating vertical rotary kiln has the advantages of small occupied area, low energy consumption and short reduction time.
In order to solve the technical problem, the utility model discloses a technical scheme be:
an external heating type vertical rotary kiln comprises a heating furnace, a rotary pipe, a spiral rotating system, a heating system and a heat exchange system;
the rotary pipes are vertically arranged in the heating furnace in an array mode, are fixedly connected with the heating furnace, are internally provided with a plurality of layers of partition plates, divide the heating furnace into a plurality of single small kilns in the vertical direction, are provided with a plurality of through holes, penetrate through the through holes on the partition plates and are connected with the partition plates through the side walls of the rotary pipes;
the spiral rotating system comprises a spiral blade and a control motor, the spiral blade is vertically arranged in the rotary pipe, and the control motor is fixedly arranged on the heating furnace;
the heat exchange system comprises heat exchangers and air return pipelines, each small kiln is provided with the heat exchanger, a communicating pipe is arranged between the heat exchanger and the small kiln, the heat exchangers are communicated with the air return pipelines, and the top ends of the air return pipelines are provided with induced draft fans;
the heating system comprises a burner, a pressurized air pipeline and a gas pipeline, the pressurized air pipeline and the gas pipeline are respectively communicated with a heat exchanger, the heat exchanger is communicated with the burner, and a plurality of groups of burners are arranged on the side wall of the heating furnace.
Furthermore, the first layer of small kilns in the heating furnace are preheating chambers, and the rest small kilns are reduction chambers.
Further, all be provided with a set of nozzle between every two adjacent rows of revolving pipes in every small kiln, every group nozzle includes 4 nozzles, and the left end of small kiln sets up two, and the right-hand member sets up two, and the direction orientation of nozzle is between two adjacent rows of revolving pipes.
Further, each small kiln is provided with two heat exchangers.
Furthermore, the partition plates are stainless steel plates, the heating furnace is divided into a plurality of small kilns through the stainless steel plates, and meanwhile the rotary pipes are supported to keep a vertical state.
Furthermore, a heat insulation plate is arranged between the adjacent small kilns, so that the relative independence of reducing atmosphere between the small kilns is ensured.
Further, still include the stand, the heating furnace passes through the fixed setting of shaped steel on the stand, and the unsettled setting of heating furnace lower extreme is the feed inlet in the heating furnace upper end, and the lower extreme is the discharge gate.
Furthermore, the rotary pipes are arranged in 6 rows in the heating furnace, and each row is provided with 6 rotary pipes.
Furthermore, the partition board is provided with 11 layers, and the heating furnace is divided into 10 small kilns on average.
Compared with the prior art, the utility model beneficial effect who has does:
1. the product quality is high, and this erects the rotary kiln and through dividing the heating furnace into a plurality of independent kilns, reducing atmosphere is independent to can accurate control the reaction temperature and the reaction time of pelletizing in the reduction chamber through spiral rotating system and heating system, guarantee that reducing atmosphere satisfies the technological condition.
2. The energy consumption of the product is low, the energy utilization rate is effectively improved through the heating system and the heat exchange system, the energy consumption of the vertical rotary kiln is 1/2 of that of a common rotary kiln, and is 1/3 of a tunnel kiln, so that the product is more environment-friendly.
3. The production scale is large, and the vertical rotary kiln can realize the product scale of more than 10 ten thousand tons per year.
4. The flue gas waste heat utilization is abundant, and the flue gas that the small kiln produced gets into the heat exchanger through communicating pipe, heats with pressurized air and the coal gas through the heat exchanger, and then supports combustion to the small kiln.
5. The production operation is convenient, the automation degree is high, and the operation efficiency is high.
Drawings
The following will explain in further detail embodiments of the present invention with reference to the accompanying drawings.
FIG. 1 is a front view of an externally heated vertical rotary kiln;
FIG. 2 is a side view of an externally heated vertical rotary kiln;
FIG. 3 is a top view of an externally heated vertical rotary kiln.
In the figure, 1 is a heating furnace, 11 is a partition plate, 12 is a spiral blade mounting frame, 13 is a small kiln, 2 is a rotary pipe, 3 is a spiral rotating system, 31 is a spiral blade, 32 is a control motor, 4 is a heating system, 41 is a burner, 42 is a pressurized air pipeline, 43 is a gas pipeline, 5 is a heat exchange system, 51 is a heat exchanger, 52 is a return air pipeline, and 6 is a vertical column.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example (b):
as shown in fig. 1 to 3, an external heating type vertical rotary kiln comprises an upright post 6, a heating furnace 1, a rotary pipe 2, a spiral rotating system 3, a heating system 4 and a heat exchange system 5;
the heating furnace 1 is arranged in a suspended mode, the outer side wall of the heating furnace 1 is welded with the upright post 6 through multilayer section steel, and the heating furnace 1 is fixedly arranged in the upright post 6 along the vertical direction;
the fixed bottom plate that is provided with of lower extreme of heating furnace 1, the fixed setting on the bottom plate of lower extreme of gyration pipe 2, be provided with the hole that corresponds with the gyration pipe discharge gate on the bottom plate, gyration pipe 2 is the vertical setting of rectangle array mode in heating furnace 1, be provided with 6 rows altogether, every row is provided with 6, gyration pipe 2 passes through corrosion resistant plate 11 and heating furnace 1's inside wall fixed connection, keep the vertical setting of gyration pipe in heating furnace 1 through corrosion resistant plate 11, 2 upper ends of gyration pipe are the feed inlet, the lower extreme is the discharge gate.
The spiral rotating system 3 comprises a spiral blade 31, a speed reducer and a control motor 32, the top end of the heating furnace 1 is provided with a spiral blade mounting frame 12, the control motor 32 and the speed reducer are fixedly arranged on the propeller mounting frame 12, a motor shaft of the control motor 32 is connected with an input shaft of the speed reducer, an output shaft of the speed reducer is connected with a rotating shaft of the spiral blade 31, the spiral blade 31 is vertically arranged in the rotary pipe 2, a rotating shaft of the spiral blade 31 is of a hollow structure, the upper end of the rotating shaft of the spiral blade is connected with the spiral blade mounting frame 12 through a bearing, a spiral blade supporting frame is arranged on a bottom plate of the heating furnace 1, the lower end of the rotating shaft of the spiral blade is connected with the spiral blade supporting frame through a thrust bearing, the spiral blade 31 can do rotary;
the heating furnace 1 is internally provided with 11 layers of stainless steel plates, the heating furnace 1 is averagely divided into 10 small kilns 13 along the vertical direction by the 11 layers of stainless steel plates, heat insulation plates are arranged between the adjacent small kilns, the mutual influence between the adjacent small kilns 13 is reduced by the heat insulation plates, the reducing atmosphere of the small kilns 13 is independent, the first small kiln 13 from top to bottom is a preheating chamber, and the rest small kilns are reducing chambers;
the heating system 4 comprises a burner 41, a pressurized air pipe 42 and a gas pipe 43, the pressurized air pipe 42 and the gas pipe 43 are arranged on the front surface and the back surface of the heating furnace 1 respectively, the pressurized air pipe 42 and the gas pipe 43 are respectively communicated with a heat exchanger, pressurized air in the pressurized air pipe 42 and gas in the gas pipe 43 are heated through the heat exchanger 51 and then enter the burner 41 for combustion.
A group of burners 41 are arranged between every two adjacent rows of rotary pipes 2 in each small kiln, the direction of the burners 41 faces to the space between the adjacent rotary pipes, each small kiln comprises 6 rows of rotary pipes and 10 small kilns in total, so that 50 groups of burners are arranged, each group comprises 4 burners, the left side of each small kiln 13 is provided with 2 burners, and the right side of each small kiln is provided with two burners;
the heat exchange system 5 comprises a heat exchanger 51 and a gas return pipeline 52, the gas return pipeline 52 is arranged on the front side and the back side of the heating furnace 1, the heat exchanger 51 is communicated with the gas return pipeline 52, a communicating pipe is arranged between the small kiln and the heat exchanger, hot flue gas generated by combustion of the small kiln enters a flue of the heat exchanger through the communicating pipe to exchange heat with pressurized air and coal gas passing through the heat exchanger, and the small kiln is assisted in combustion.
The heat exchangers 51 are arranged at the front side and the rear side of the heating furnace 1, and two heat exchangers 51 are correspondingly arranged in each small kiln;
the top end of the gas return pipeline 52 is provided with an induced draft fan, and the flue gas in the heat exchanger is extracted by the induced draft fan.
The working method comprises the following steps:
starting a control motor 32, driving a spiral blade 31 to rotate by the control motor 32, filling materials into a feeding port at the upper end of a rotary pipe 2 through a feeding device, firstly dropping the raw materials on blades of the spiral blade 31, driving the raw materials to move downwards at a certain speed under the driving of the spiral blade 31, firstly passing the raw materials through a preheating chamber, heating the raw materials in the rotary pipe 2 and the rotary pipe 2 in the preheating chamber by using burners 41 at two sides of the preheating chamber, continuously moving the preheated pellets to a reduction chamber under the driving of the spiral blade 31, dividing the reduction chamber into 9 kilns from top to bottom, ensuring the temperature in the rotary pipe 2 to be stable by using the burners 41 at the left end and the right end of the kilns, reducing the pellets in the reduction chamber for a period of time, and discharging final finished products through a discharging port at the lower end of the rotary.
The above description has been made in detail only for the preferred embodiment of the present invention, but the present invention is not limited to the above embodiment, and various changes can be made without departing from the spirit of the present invention within the knowledge scope of those skilled in the art, and all such changes are intended to be encompassed by the present invention.
Claims (9)
1. An external heating type vertical rotary kiln is characterized in that: comprises a heating furnace (1), a rotary pipe (2), a spiral rotating system (3), a heating system (4) and a heat exchange system (5);
the device is characterized in that a plurality of rotary pipes (2) are vertically arranged in the heating furnace (1) in an array mode, the rotary pipes (2) are fixedly connected with the heating furnace (1), a plurality of layers of partition plates (11) are arranged in the heating furnace (1), the heating furnace (1) is divided into a plurality of independent small kilns (13) in the vertical direction, a plurality of through holes are formed in the partition plates (11), and the rotary pipes (2) penetrate through the through holes in the partition plates (11) and are connected with the partition plates (11) through the side walls of the rotary pipes (2);
the spiral rotating system (3) comprises a spiral blade (31) and a control motor (32), the spiral blade (31) is vertically arranged in the rotary pipe (2), and the control motor (32) is fixedly arranged on the heating furnace (1);
the heat exchange system (5) comprises heat exchangers (51) and air return pipelines (52), each small kiln (13) is provided with the heat exchanger (51), a communicating pipe is arranged between each heat exchanger (51) and each small kiln (13), each heat exchanger (51) is communicated with the corresponding air return pipeline (52), and the top end of each air return pipeline (52) is provided with an induced draft fan;
the heating system (4) comprises a burner (41), a pressurized air pipeline (42) and a gas pipeline (43), the pressurized air pipeline (42) and the gas pipeline (43) are respectively communicated with a heat exchanger (51), the heat exchanger (51) is communicated with the burner (41), and a plurality of groups of burners (41) are arranged on the side wall of the heating furnace (1).
2. An externally heated vertical rotary kiln as claimed in claim 1, wherein: the first layer of small kilns (13) on the upper surface in the heating furnace (1) are preheating chambers, and the other small kilns (13) are reducing chambers.
3. An externally heated vertical rotary kiln as claimed in claim 1, wherein: a group of burners (41) are arranged between every two adjacent rows of rotary pipes in each small kiln (13), each group of burners comprises 4 burners, the left end of each small kiln (13) is provided with two burners, the right end of each small kiln is provided with two burners, and the direction of each burner (41) faces to the position between two adjacent rows of rotary pipes (2).
4. An externally heated vertical rotary kiln as claimed in claim 1, wherein: each small kiln (13) is provided with two heat exchangers (51).
5. An externally heated vertical rotary kiln as claimed in claim 1, wherein: the partition plate is a stainless steel plate.
6. An externally heated vertical rotary kiln as claimed in claim 1, wherein: a heat insulation plate is arranged between the adjacent small kilns (13).
7. An externally heated vertical rotary kiln as claimed in claim 1, wherein: still include stand (6), heating furnace (1) passes through the fixed setting of shaped steel on the stand, and the unsettled setting of heating furnace (1) lower extreme is the feed inlet in the upper end of heating furnace (1), and the lower extreme is the discharge gate.
8. An externally heated vertical rotary kiln as claimed in claim 1, wherein: the rotary pipes (2) are arranged in 6 rows in the heating furnace (1), and each row is provided with 6 rotary pipes (2).
9. An externally heated vertical rotary kiln as claimed in claim 1, wherein: the partition board (11) is provided with 11 layers, and the heating furnace (1) is divided into 10 small kilns on average.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020690030.0U CN212270149U (en) | 2020-04-29 | 2020-04-29 | External heating type vertical rotary kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020690030.0U CN212270149U (en) | 2020-04-29 | 2020-04-29 | External heating type vertical rotary kiln |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212270149U true CN212270149U (en) | 2021-01-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020690030.0U Expired - Fee Related CN212270149U (en) | 2020-04-29 | 2020-04-29 | External heating type vertical rotary kiln |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212270149U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111334633A (en) * | 2020-04-29 | 2020-06-26 | 王安新 | External heating type vertical rotary kiln |
-
2020
- 2020-04-29 CN CN202020690030.0U patent/CN212270149U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111334633A (en) * | 2020-04-29 | 2020-06-26 | 王安新 | External heating type vertical rotary kiln |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210101 |