CN106643127B - Double-layer rotary kiln - Google Patents
Double-layer rotary kiln Download PDFInfo
- Publication number
- CN106643127B CN106643127B CN201710007774.0A CN201710007774A CN106643127B CN 106643127 B CN106643127 B CN 106643127B CN 201710007774 A CN201710007774 A CN 201710007774A CN 106643127 B CN106643127 B CN 106643127B
- Authority
- CN
- China
- Prior art keywords
- rotary kiln
- inner shell
- shell
- outer shell
- kiln body
- 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.)
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- 239000000463 material Substances 0.000 claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- 230000005484 gravity Effects 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000003795 desorption Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
- F27B2007/027—Rotary-drum furnaces, i.e. horizontal or slightly inclined of multiple-chamber or multiple-drum type with more than one drum
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
Abstract
The invention provides a double-layer rotary kiln, which aims to solve the problems that the kiln body of the rotary kiln is long, the heat loss is large in the material advancing process, and the heating effect is uneven. When the equipment is installed, the two ends of the kiln body of the rotary kiln are not positioned on the same horizontal plane according to the requirement; the rotary kiln is technically characterized in that a shell of a rotary kiln body is of a sleeve structure and is divided into an outer shell and an inner shell, the inner shell is arranged in the outer shell, the inner shell is cylindrical, the outer shell is barrel-shaped, one end of the inner shell is communicated with a feed inlet, and the other end of the inner shell is not contacted with the bottom of the outer shell; a spiral blade rotating anticlockwise is arranged between the inner shell and the outer shell, and a spiral blade rotating clockwise is arranged in the inner shell. The invention also has the characteristics of simple structure, simple and convenient operation, strong practicability and the like.
Description
Technical Field
Technical field: the invention relates to the technical field of rotary kilns, in particular to a double-layer rotary kiln which saves the occupied area and performs drying, heating and thermal desorption on powder and granular materials.
The background technology is as follows: the rotary kiln is widely applied to the technical processes of drying, heating, thermal desorption and the like of granular or powdery materials. The general technological process is that the material to be heated is fed from one end, heat exchanged with the countercurrent hot air flow and exhausted from the other end. The material mainly depends on the gradient of the kiln body to move forwards, and the stroke of the material is unidirectional, so that the kiln body needs enough length to meet the processing requirement of the material, and the occupied area and the arrangement difficulty of the rotary kiln are greatly increased. Meanwhile, the working temperature of the rotary kiln is higher, usually hundreds of degrees centigrade, and the heat dissipation loss of the rotary kiln reaches 10% -20%, so that the heat dissipation of the kiln body is reduced, the energy utilization rate is improved, and the material treatment cost is greatly reduced.
And the kiln body of the rotary kiln is longer, the heat loss is large in the material advancing process, and the heating effect is uneven. And when the equipment is installed, the two ends of the kiln body of the rotary kiln are not positioned on the same horizontal plane according to the requirement.
Disclosure of Invention
The invention provides a double-layer rotary kiln.
The purpose of the invention is realized in the following way: the rotary kiln comprises a rotary kiln body, a rotary kiln shell, a rotary kiln and a rotary kiln, wherein the rotary kiln body is characterized in that the rotary kiln body is of a sleeve structure and is divided into an outer shell and an inner shell, the inner shell is arranged in the outer shell, the inner shell is cylindrical, the outer shell is barrel-shaped, one end of the inner shell is communicated with a feed inlet, and the other end of the inner shell is not contacted with the bottom of the outer shell; a spiral blade rotating anticlockwise is arranged between the inner shell and the outer shell, and a spiral blade rotating clockwise is arranged in the inner shell.
The bottom of the barrel-shaped outer shell is provided with an air outlet.
The invention has the advantages of simple structure, simple and convenient operation and strong practicability. On the basis of reducing the occupied area of the equipment, the heat energy is effectively utilized to heat the materials.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Description of the embodiments
Embodiment 1 referring to fig. 1, a shell of a rotary kiln body is of a sleeve structure, the shell is divided into an outer shell and an inner shell, the inner shell is arranged in the outer shell, the inner shell is cylindrical, the outer shell is barrel-shaped, one end of the inner shell is communicated with a feed inlet, and the other end of the inner shell is not contacted with the bottom of the outer shell; a spiral blade rotating anticlockwise is arranged between the inner shell and the outer shell, and a spiral blade rotating clockwise is arranged in the inner shell.
The bottom of the barrel-shaped outer shell is provided with an air outlet.
Manufacturing an inner shell 6 and an outer shell 8 of the rotary kiln by adopting 304 or 316 steel plates, wherein the ratio of the radius R1 of the inner shell to the radius R2 of the outer shell is R1:R2=0.611:1; the length of the kiln body is chosen according to the actual requirements of the process, wherein the outer shell 8 is to be able to completely encase the inner shell 6 with a suitable margin, as shown in fig. 1.
A 304 or 316 steel plate with the thickness of 10mm is adopted to manufacture a clockwise rotating blade 11, the height h=2/3R 1 of the blade is selected according to the process requirement, and the pitch of the screw is for example R1. Then, the blades are welded to the inner wall of the inner housing 6. The blades 12 rotating anticlockwise are made of 304 or 316 steel plates with the thickness of 10mm, the rotation direction of the blades is opposite to that of the blades 11 rotating clockwise, the height of the blades is equal to the radius difference between the outer shell 8 and the inner shell 6, the welding requirement is properly considered, and the spiral pitch is selected according to the process requirement, for example, R1 can also be adopted.
The counter-clockwise rotating blades 12 are welded onto the inner wall of the outer housing 8. Then the inner shell 6 is placed at the center of the anticlockwise rotating blade 12, and the two are welded together, so that the inner kiln body and the outer kiln body are combined into a whole.
A round cover body 2 is added at the feeding end, the upper part of the round cover body is provided with an air inlet 4, the lower part of the round cover body is provided with a discharge hole 3, and the feeding pipe 1 and the cover body 2 are welded into a whole. The cover body 2 and the rotary kiln are sealed by fish scales.
A sealing baffle plate is additionally arranged at the tail end of the kiln body, and an air outlet 13 is arranged at the center of the baffle plate.
The rotary kiln is additionally provided with supporting mechanisms such as riding wheels 5 and the like, and is welded with a large gear ring 10, and the supporting mechanisms, a transmission gear 7, a motor 9 and the like form a power mechanism.
In order to further enhance the heat preservation and heating effects, an insulation layer can be laid on the outer surface of the outer shell body 8, so that the heat preservation effect which is twice as high as that of a common rotary kiln can be achieved.
When in operation, the inner shell 6 and the outer shell 8 of the rotary kiln are driven by the motor 9 to rotate together. The material and heating medium enter the inner shell 6 from the feeding pipe 1, move forward under the action of the clockwise rotating blades 11 and gravity, naturally fall into the outer shell 8 after reaching the tail end, return to the feeding end under the action of the anticlockwise rotating blades 12 and gravity, and are discharged from the discharging port 3. Carrier gas medium enters the kiln body from the air inlet 4, and is discharged from the air outlet 13, so that gas generated by heating materials is taken away.
Claims (1)
1. A double-deck rotary kiln comprising: rotary kiln body, characterized by: the rotary kiln comprises a rotary kiln body, a rotary kiln shell, a rotary kiln and a rotary kiln, wherein the rotary kiln body is characterized in that the rotary kiln body is of a sleeve structure and is divided into an outer shell and an inner shell, the inner shell is arranged in the outer shell, the inner shell is cylindrical, the outer shell is barrel-shaped, one end of the inner shell is communicated with a feed inlet, and the other end of the inner shell is not contacted with the bottom of the outer shell; the inner shell and the outer shell are connected into a whole, and the inner shell is internally provided with the clockwise rotating helical blades; the outer shell completely wraps the inner shell, and a margin is reserved; the feeding end is provided with a cover body, the upper part of the cover body is provided with an air inlet, and the lower part of the cover body is provided with a discharge hole; the bottom of the barrel-shaped outer shell is provided with an air outlet which is formed in the center of a sealing baffle at the tail end of the kiln body;
the cover body is fixedly connected with a feeding pipe, the feeding pipe is communicated with the inner shell body, materials and heating mediums enter the inner shell body from the feeding pipe, move forward under the action of clockwise spiral blades and gravity, naturally fall into the outer shell body after reaching the tail end of the inner shell body, and return to the feeding end to be discharged from the discharge port under the action of anticlockwise spiral blades and gravity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710007774.0A CN106643127B (en) | 2017-01-05 | 2017-01-05 | Double-layer rotary kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710007774.0A CN106643127B (en) | 2017-01-05 | 2017-01-05 | Double-layer rotary kiln |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106643127A CN106643127A (en) | 2017-05-10 |
| CN106643127B true CN106643127B (en) | 2023-12-15 |
Family
ID=58842587
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710007774.0A Active CN106643127B (en) | 2017-01-05 | 2017-01-05 | Double-layer rotary kiln |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106643127B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109078975A (en) * | 2018-07-16 | 2018-12-25 | 北京建工环境修复股份有限公司 | A kind of contaminated soil is classified indirect thermal desorption coupling and catalyzing degradation repair system and method |
| CN109737735B (en) * | 2018-12-26 | 2021-01-01 | 合肥恒力装备有限公司 | Manufacturing method of powder material high-temperature calcination rotary furnace tube |
| CN113909289A (en) * | 2021-11-12 | 2022-01-11 | 南京中船绿洲环保有限公司 | Soil remediation direct thermal desorption rotary kiln equipment guide dust fall spiral |
| CN114110602A (en) * | 2021-11-26 | 2022-03-01 | 南京万德斯环保科技股份有限公司 | Baffling rotary kiln |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2814288Y (en) * | 2005-08-18 | 2006-09-06 | 宝山钢铁股份有限公司 | Rotary kiln feeding propelling device |
| CN105349157A (en) * | 2015-11-23 | 2016-02-24 | 中国庆华能源集团有限公司 | Rotary type pyrolysis reactor and pyrolysis method |
| CN205784519U (en) * | 2016-05-19 | 2016-12-07 | 湖南万容科技股份有限公司 | A kind of internal heat type Non-oxygen pyrolytic rotary kiln device |
-
2017
- 2017-01-05 CN CN201710007774.0A patent/CN106643127B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2814288Y (en) * | 2005-08-18 | 2006-09-06 | 宝山钢铁股份有限公司 | Rotary kiln feeding propelling device |
| CN105349157A (en) * | 2015-11-23 | 2016-02-24 | 中国庆华能源集团有限公司 | Rotary type pyrolysis reactor and pyrolysis method |
| CN205784519U (en) * | 2016-05-19 | 2016-12-07 | 湖南万容科技股份有限公司 | A kind of internal heat type Non-oxygen pyrolytic rotary kiln device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106643127A (en) | 2017-05-10 |
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