CN208254202U - A kind of external-heating rotary kiln - Google Patents
A kind of external-heating rotary kiln Download PDFInfo
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- CN208254202U CN208254202U CN201820819972.7U CN201820819972U CN208254202U CN 208254202 U CN208254202 U CN 208254202U CN 201820819972 U CN201820819972 U CN 201820819972U CN 208254202 U CN208254202 U CN 208254202U
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- rotary kiln
- heat exchange
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Abstract
A kind of external-heating rotary kiln belongs to indirect heat exchange equipment, for being pyrolyzed to material, destructive distillation, calcining, roasting etc..External-heating rotary kiln is made of two major parts of furnace body fixed outside the rotary kiln body and kiln body at horizontal type level slightly inclination angle.It can be passed through the gaseous mediums such as flue gas, hot-air in furnace body, or generate flue gas for combustion of fossil fuels in bottom of furnace body setting burner.Positioned at furnace intracorporal rotary kiln steel cylinders outer wall, heat exchange fin is set, significantly increase heat exchange area, increase supply of the heat from gaseous medium to steel cylinders, solves the heat transfer coefficient for being far below steel cylinders and material with steel cylinders heat transfer coefficient because of gaseous medium, to limit the problem of heat transfer.This external-heating rotary kiln is widely used in the industries such as chemical industry, the energy, metallurgy, building materials, environmental protection.
Description
Technical field
The utility model relates to rotary kiln technology, in particular to a kind of external-heating rotary kiln.
Background technique
External-heating rotary kiln is also referred to as pyrolyzed kiln (kiln), calcining (roasting) kiln, retorting machine etc..
External-heating rotary kiln is made of furnace body two parts fixed outside the rotary kiln body and kiln body at horizontal type level slightly inclination angle.
Rotary kiln body is largely placed in heating furnace body.The gaseous mediums such as flue gas, hot-air can be passed through in furnace body or bottom of furnace body is set
It sets burner combustion and generates flue gas.Gaseous medium heating rotary kiln body transfers heat to rotary kiln body, and rotary kiln body again will be hot
Amount passes to the intracorporal material of rotary kiln, the final transmitting for realizing heat from gaseous medium to material.For carrying out heat to material
Solution, destructive distillation, calcining, roasting etc..
But since the steel cylinders heat transfer coefficient of the intracorporal gaseous medium of furnace and rotary kiln body is very low, and steel cylinders and cylinder
Internal material heat transfer coefficient is very big, and heat exchange amount and the coefficient of heat transfer are proportional, so as to cause heat transfer " supply falls short of demand ",
That is the heat transfer of the steel cylinders of gaseous medium and rotary kiln body becomes the bottleneck that heat is ultimately transferred to material from gaseous medium.It leads
The heat for passing to material is caused to be extremely limited, it, can only be by increasing device diameters and length or increase to guarantee total heat transfer
Number of devices is realized, causes greatly to waste, equipment heat exchange efficiency is very low.
To increase equipment heat exchange amount, equipment heat exchange efficiency is improved, it is necessary to release the bottleneck of heat supply, i.e., by increasing gas
Heat exchange amount between state medium and steel cylinders supplies to increase heat.Heat exchange amount is proportional with the coefficient of heat transfer, heat exchange amount
It is proportional with heat exchange area.The low defect of the coefficient of heat transfer can be made up by increasing heat exchange area, for improving heat
Amount supply.
Utility model content
To overcome problems of the prior art, the utility model provides a kind of external-heating rotary kiln.
The technical solution adopted by the utility model to solve its technical problems is that: this kind of external-heating rotary kiln, including revolution
Furnace body outside kiln body and kiln body, gaseous medium can be passed through in furnace body or bottom of furnace body setting burner combustion generates flue gas, in place
In furnace intracorporal rotary kiln steel cylinders outer wall, heat exchange fin is set.
Further, external-heating rotary kiln is by furnace body two fixed outside horizontal type level rotary kiln body with angle and kiln body
It is grouped as, rotary kiln body leading portion is feed inlet, and rear end is discharge port, and kiln body is equipped with gear assembly, and kiln body both ends set rolling
Enclose bearing device, rotary kiln body is partially disposed in heating furnace body, and furnace body sets insulating layer, can be passed through in furnace body flue gas, hot-air,
Cold air gaseous medium.
Further, the heat exchange fin is several strip heat exchange fins being arranged in rotary kiln body outer wall.
Further, the heat exchange fin is several parallel ring fins being arranged in rotary kiln body outer wall.
Further, the heat exchange fin is several spiral shape heat exchange fins being arranged in rotary kiln body outer wall.
Further, the heat exchange fin is several single column heat exchange fins being arranged in rotary kiln body outer wall.
To sum up, the above-mentioned technical proposal of the utility model has the beneficial effect that:
By the way that heat exchange fin is arranged in the rotary kiln outer wall, the inboard wall of furnace body that are located in furnace body, heat exchange area is significantly increased, is increased
Big supply of the heat from gaseous medium to steel cylinders is solved because gaseous medium and steel cylinders heat transfer coefficient are far below steel
The heat transfer coefficient of cylinder and material, to limit the problem of heat transfer.Heat exchange can be made up by increasing heat exchange area
The low defect of coefficient, for improving heat supply.
This external-heating revolving kiln is also widely applied to the industries such as chemical industry, the energy, metallurgy, building materials, environmental protection, for object
Material is pyrolyzed, destructive distillation, calcining, roasting, drying, cooling etc..
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model rotary kiln body furnace.
Fig. 2 is one fin structure of the utility model embodiment.
Fig. 3 is two kinds of fin structures of the utility model embodiment.
Fig. 4 is three kinds of fin structures of the utility model embodiment.
Fig. 5 is a kind of fin structure of the utility model embodiment four.
In figure:
A rotary kiln body, B furnace body, C strip heat exchange fin, D ring fin, E spiral shape heat exchange fin, the heat exchange of F column
Fin.
1 feed inlet, 2 feeding seals, 3 gear wheels, 4 rolling rings, 5 insulating layers, 6 heat exchange fins, 7 steel cylinders, 8 dischargings are close
Envelope, 9 discharge covers, 10 bearing devices, 11 pinion gears, 12 motor reducers, 13 gas inlets, 14 exhanst gas outlets.
Specific embodiment
It is described in detail below in conjunction with feature and principle of the attached drawing to the utility model, illustrated embodiment is only used for explaining
The utility model not limits the protection scope of the utility model with this.
External-heating rotary kiln is by furnace body B two parts group fixed outside the rotary kiln body A and kiln body at horizontal type level slightly inclination angle
At.Rotary kiln body A leading portion is feed inlet 1, and rear end is discharge port, and rotary kiln body A is equipped with gear assembly, including gear wheel
3 and pinion gear 11 and motor reducer 12.The both ends rotary kiln body A set the bearing device 10 of rolling ring 4.Rotary kiln body A is most of
It is placed in heating furnace body B.Furnace body B sets insulating layer 5, and the gaseous states such as flue gas, hot-air can be passed through between furnace body B and rotary kiln body A
Medium can also be arranged burner in bottom of furnace body, generate flue gas for combustion of fossil fuels.Wherein flue gas passes through gas inlet 13
Into being discharged by exhanst gas outlet 14.
Gaseous medium is heated or cooled rotary kiln body A and transfers heat to rotary kiln body A, and rotary kiln body A again passes heat
The material in rotary kiln body A is passed, the final transmitting for realizing heat from gaseous medium to material.
Rotary kiln body A outer wall is equipped with heat exchange fin 6 in its outer wall along rotary kiln axis direction, significantly increases heat exchange area,
Increase heat from gaseous medium to steel cylinders 7 supply, solve because gaseous medium and 7 heat transfer coefficient of steel cylinders are far below
The heat transfer coefficient of steel cylinders 7 and material, to limit the problem of heat transfer.It can be made up by increasing heat exchange area
The low defect of the coefficient of heat transfer, for improving heat supply.Feeding seal 2 is equipped between copper cylinder 7 and feeding device, with discharge cover
Discharging sealing 8 is equipped between 9.
Embodiment one, as shown in Fig. 2, heat exchange fin is the strip heat exchange fin C being arranged in rotary kiln body A outer wall.
Embodiment two, as shown in figure 3, heat exchange fin is several parallel ring fins being arranged in rotary kiln body A outer wall
D。
Embodiment three, as shown in figure 4, heat exchange fin is the spiral shape heat exchange fin E being arranged in rotary kiln body A outer wall.
Example IV, as shown in figure 5, heat exchange fin is the single column heat exchange fin F being arranged in rotary kiln body A outer wall.
Example:
The external-heating rotary kiln that one barrel diameter is 1 meter increases ring fin positioned at the cylinder of furnace interior, and fin is high
Degree is 50 millimeters, and fin thickness is 3 millimeters, and adjacent fins spacing is 40 millimeters, then the heat exchange area of fin is about in one meter of length
It is 8.2 square metres, the cylinder heat exchange area of one meter of length is 3.14 square metres, and total heat exchange area is 11.34 square metres, increases wing
Heat exchange area is 3.6 times of non-finned cylinder after piece.So that being shown by the heat supply capacity that gaseous medium passes to steel cylinders 7
It writes and improves, to significantly improve the heat-exchange capacity of whole equipment, improve the heat exchange efficiency of equipment
Such external-heating rotary kiln equipment application is extensive, high equipment cost, this patent solves heat supply and demand serious unbalance
Problem, significantly improve equipment heat exchange efficiency, so patent have sizable economic value.
Above-described embodiment is only the description carried out to preferred embodiments of the present invention, not to model of the invention
It encloses and is defined, under the premise of not departing from the spirit of the design of the utility model, relevant technical staff in the field is to the utility model
Various changes and improvements, should all expand in protection scope determined by the utility model claims book.
Claims (6)
1. a kind of external-heating rotary kiln, which is characterized in that including the furnace body outside rotary kiln body and kiln body, gaseous state can be passed through in furnace body
Medium or bottom of furnace body setting burner combustion generate flue gas, change in the rotary kiln steel cylinders outer wall setting being located in furnace body
Hot fin.
2. a kind of external-heating rotary kiln according to claim 1, which is characterized in that external-heating rotary kiln is by horizontal type level band
Fixed furnace body two parts composition outside the rotary kiln body and kiln body at inclination angle, rotary kiln body leading portion are feed inlet, and rear end is discharge port,
Kiln body is equipped with gear assembly, and kiln body both ends set rolling ring bearing device, and rotary kiln body is partially disposed in heating furnace body, furnace
Body sets insulating layer, and flue gas, hot-air, cold air gaseous medium can be passed through in furnace body.
3. a kind of external-heating rotary kiln according to claim 1, which is characterized in that the heat exchange fin is in rotary kiln body
Several strip heat exchange fins of outer wall setting.
4. a kind of external-heating rotary kiln according to claim 1, which is characterized in that the heat exchange fin is in rotary kiln body
Several parallel ring fins of outer wall setting.
5. a kind of external-heating rotary kiln according to claim 1, which is characterized in that the heat exchange fin is in rotary kiln body
Several spiral shape heat exchange fins of outer wall setting.
6. a kind of external-heating rotary kiln according to claim 1, which is characterized in that the heat exchange fin is in rotary kiln body
Several single column heat exchange fins of outer wall setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820819972.7U CN208254202U (en) | 2018-05-29 | 2018-05-29 | A kind of external-heating rotary kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820819972.7U CN208254202U (en) | 2018-05-29 | 2018-05-29 | A kind of external-heating rotary kiln |
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| Publication Number | Publication Date |
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| CN208254202U true CN208254202U (en) | 2018-12-18 |
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ID=64652826
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| CN201820819972.7U Active CN208254202U (en) | 2018-05-29 | 2018-05-29 | A kind of external-heating rotary kiln |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110145933A (en) * | 2019-06-20 | 2019-08-20 | 山东齐盛机电工程有限公司 | Hot Combined type back rotary kiln and its application method inside and outside one kind |
| WO2021027760A1 (en) * | 2019-08-14 | 2021-02-18 | 招远市汇潮新能源科技有限公司 | Cracking system and cracking process |
| WO2021082597A1 (en) * | 2019-10-29 | 2021-05-06 | 招远市汇潮新能源科技有限公司 | Cracking device |
| CN114410985A (en) * | 2022-02-10 | 2022-04-29 | 兰州有色冶金设计研究院有限公司 | Zinc leaching slag treatment system and treatment method |
-
2018
- 2018-05-29 CN CN201820819972.7U patent/CN208254202U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110145933A (en) * | 2019-06-20 | 2019-08-20 | 山东齐盛机电工程有限公司 | Hot Combined type back rotary kiln and its application method inside and outside one kind |
| WO2021027760A1 (en) * | 2019-08-14 | 2021-02-18 | 招远市汇潮新能源科技有限公司 | Cracking system and cracking process |
| WO2021082597A1 (en) * | 2019-10-29 | 2021-05-06 | 招远市汇潮新能源科技有限公司 | Cracking device |
| CN114410985A (en) * | 2022-02-10 | 2022-04-29 | 兰州有色冶金设计研究院有限公司 | Zinc leaching slag treatment system and treatment method |
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