CN203540498U - Constant-temperature rotary roasting device - Google Patents
Constant-temperature rotary roasting device Download PDFInfo
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- CN203540498U CN203540498U CN201320385278.6U CN201320385278U CN203540498U CN 203540498 U CN203540498 U CN 203540498U CN 201320385278 U CN201320385278 U CN 201320385278U CN 203540498 U CN203540498 U CN 203540498U
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Abstract
The utility model relates to a constant-temperature rotary roasting device. The upper part of a smelting tank is provided with a fused salt circulating pump, the fused salt circulating pump is connected with a fused salt heater, the fused salt is connected with an inlet collection box of a roller reactor through the fused salt heater, an outlet collection box of the roller reactor is connected with the smelting tank, a roller reactor heat exchanging pipe is arranged in the roller reactor, a material feeding port of the roller reactor is communicated with a material granulating machine, the other end of the roller reactor is provided with a clinker outlet and a heat exchanger exhaust port, by utilizing the severe and continuous reversing and collision of materials inside a roller, the materials can be uniformly heated, and the reaction time is shortened; meanwhile, by combining the granulating technology, the wall surface caking phenomenon in the material roasting process can be effectively avoided; the fused salt is used as a heat exchanging medium, and the fused salt is good in heat stability and high in heat transfer coefficient, so that the temperature uniformity inside the roller reactor is well controlled, the extracting efficiency of the product is high, and the clinker quality is good.
Description
Technical field
The utility model belongs to chemical industry solid material heat exchange reaction technology field, is specifically related to a kind of constant temperature revolution calciner.
Background technology
Flyash is the solid waste that coal-burning boiler is discharged with flue gas, and it is coal impurity melting when high-temp combustion, the glassy solids particulate forming through quenching.Flyash main chemical compositions is Al
2o
3and SiO
2, both reach more than 80% sum.Comprehensive utilization flyash, extracts aluminium oxide, is a kind of high value added utilization of secondary resource.The research is at present from theory and experimental study, turns to pilot scale and industrial test research, but it is still very limited to can be used for the technology path of suitability for industrialized production.
Alkali roasting method, because technique is simple, makes some progress in industrial applications, but has jejune or uneconomic place because its intrinsic defect causes whole technique, makes to produce hard to carry on; Acidleach is followed the example of because it is high to the requirement of equipment corrosion resistant, and cost of investment is huge, the research in theoretical and laboratory stage always, and the road of industrialization is also veryer long; And reacting phase also can be controlled to gentle, the quantity of slag ammonium sulfate method also do not realize suitability for industrialized production, mainly that this technique cannot solve the baking mixed generation aluminum sulfate of ammonium sulfate and flyash or the not high problem of alum production rate always: the fusing point of ammonium sulfate, alum is lower, in course of reaction, form very soon molten condition, easily be adhered to reactor wall, and ammonium sulfate also easily decompose, after decomposition cannot with Al in flyash
2o
3react, cause Al
2o
3recovery rate not high.Therefore, how can solve preferably ammonium sulfate and flyash roasting problem, be only the key on the road of ammonium sulfate method industrialization.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the purpose of this utility model is to provide a kind of constant temperature revolution calciner, utilize the heat-transfer character of fused salt and the kinetic characteristic of cylinder, reasonable Arrangement heat-transfer surface, realize constant temperature in cylinder, this device can effectively be controlled the roasting time of material simultaneously, and that effectively avoids occurring in roasting is bonding, and can remote control, have advantages of reaction efficiency high, can be continuously, stable, efficient, a large amount of material handling and quality of finished stable.
In order to solve the problems of the technologies described above, the technical solution adopted in the utility model:
A kind of constant temperature revolution calciner, comprise fusion tank 1, fusion tank 1 top is provided with molten salt circulating pump 2, the inlet duct of molten salt circulating pump 2 is deeply to fusion tank 1 bottom, the outlet conduit of molten salt circulating pump 2 connects molten salt heater 3 inlet ducts, fused salt is connected to the cylinder reactor inlet header 4 of cylinder reactor 5 from molten salt heater 3 outlet conduits, the cylinder reactor outlet header 7 of cylinder reactor 5 is connected with fusion tank 1, in cylinder reactor 5, be provided with cylinder reactor heat exchanger tube 6, the cylinder reactor content of cylinder reactor 5 one end is connected with the outlet of material comminutor 8 to entrance 9.Cylinder reactor 5 other ends are provided with grog outlet 10 and heat exchanger exhaust outlet 11, and cylinder reactor content exports 10 to entrance 9 horizontal levels higher than grog.
Compared with prior art, the utility model has the advantages that:
1) reactor adopts drum-type, by regulating rotation speed of drum, can effectively control material roasting time; Simultaneously, in conjunction with granulating technique, control the suitable particle size of roasting material, can effectively avoid occurring in material roasting process bonding phenomenon.
2) by the output that regulates molten salt circulating pump, change fused salt internal circulating load, in conjunction with drum reactor feature, effectively index drum reactor temperature distribution evenness along its length, guarantees that material has suitable reaction temperature interval in reactor overall process.
In sum, the utlity model has effectively avoid occurring in roasting bonding phenomenon, temperature homogeneity is good, reaction efficiency is high, can continuous feeding and discharging, treating capacity is large, quality of finished is stable, the cycle of operation is long, be easy to grog collects, is easy to off-gas recovery utilization, easy operating control, the advantage such as energy-conservation.
Accompanying drawing explanation
Accompanying drawing is system schematic of the present utility model.
The specific embodiment
Below in conjunction with accompanying drawing, describe embodiment of the present utility model in detail.
As shown in drawings, a kind of constant temperature revolution calciner, described system comprises fusion tank 1, fusion tank 1 top is provided with molten salt circulating pump 2, the inlet duct of molten salt circulating pump 2 is deeply to fusion tank 1 bottom, the outlet conduit of molten salt circulating pump 2 connects molten salt heater 3 inlet ducts, fused salt is connected to the cylinder reactor inlet header 4 of cylinder reactor 5 from molten salt heater 3 outlet conduits, the cylinder reactor outlet header 7 of cylinder reactor 5 is connected with fusion tank 1, in cylinder reactor 5, be provided with cylinder reactor heat exchanger tube 6, the cylinder reactor content of cylinder reactor 5 one end is connected with the outlet of material comminutor 8 to entrance 9.Cylinder reactor 5 other ends are provided with grog outlet 10 and heat exchanger exhaust outlet 11, and cylinder reactor content exports 10 to entrance 9 horizontal levels higher than grog.
Operation principle of the present utility model comprises the following steps:
Step 1, the interior heating fused salt of fusion tank 1, to molten state, are delivered to molten salt heater 3 through circulating pump 2, and molten salt heater 3 is heated to 400 ℃～450 ℃ by fused salt;
Fused salt after step 2, heating enters into the cylinder reactor inlet header 4 of cylinder reactor 5, after heat exchanger tube 6 heat exchange, from the cylinder reactor outlet header 7 of cylinder reactor 5, discharges and is recycled to fusion tank 1.
Reaction system of the present utility model, take fused salt as heat transfer medium, utilize fused salt within the scope of 350 ℃～550 ℃, there is better heat endurance, compared with the feature of high heat transfer coefficient, fused salt is heated to uniform temperature by heater, by circulating pump, deliver to drum reactor, the mixed material of fused salt and ammonium sulfate and flyash is by indirect heat exchange mode, and heating mixed material reaches desired reaction temperature.
Fused salt enters cylinder reactor, by rational heating surface, is arranged and is guaranteed that cylinder has good temperature homogeneity along its length, provides good reaction environment to mixed material; Simultaneously by the control of drum rotation speed, guarantee that material stops the reaction time and is controlled at more than 150 minutes in cylinder.
Ammonium sulfate and flyash adopt granulating technique, obtain the mixed material of suitable particle size, have improved contact mutual with flyash of ammonium sulfate, promote reacting to each other of storeroom.Drum reactor is in conjunction with granulating technique, and material rolls each other, collides in cylinder, can effectively avoid occurring in material roasting process bonding phenomenon.Fused salt after heat exchange is recycled to fused salt groove, reheats and recycles.
Core of the present utility model be one be adopt fused salt be heat transfer medium, utilize fused salt within the scope of 350 ℃～550 ℃, there is better heat endurance, compared with the advantage of high heat transfer coefficient; It utilizes the kinetic characteristic of cylinder two for to select cylinder be the reaction unit of mixed material, and one is conducive to material is heated evenly, and improves the mutual reactivity of material, shortens roasting time.Two carry out the tumbling motion by cylinder, can effectively avoid material materials from bonding that chemical reaction occurs simultaneously to occur in reactor in the phenomenon of cylinder reactor wall.
Fusion tank 1 described in the utility model is for fused salt heating and storage.
Roasting heat transferring medium described in the utility model adopts fused salt, utilizes the good heat endurance of fused salt and higher heat transfer property.
The utility model cylinder reactor 5 utilizes cylinder characteristic, can effectively avoid occurring bonding being conducive to strengthen heat exchange in material roasting simultaneously, shortens roasting time.
The utility model cylinder reactor 5 has certain angle of inclination, and cylinder reactor content designs at high point to entrance 9, and grog outlet 10 designs, at lower, guarantee that material, smoothly from grog outlet 10 discharges, obtains required grog.
The utility model cylinder reactor 5 adopts gateway, two ends header+middle heat exchanger tube straight pipe type to arrange, avoids molten salt pipeline to occur dead band.
In the utility model, employing fused salt is heat transferring medium, within the scope of 350 ℃～550 ℃, give full play to fused salt and there is good heat endurance, and higher heat transfer coefficient advantage, adopt indirect heat exchange baking modes, be convenient to the collection of grog and the recovery of generation flue gas.Adopt drum reactor, control material and in cylinder, constantly carry out violent rolling, collision, the heat transfer that is conducive to material is even, Reaction time shorten; In conjunction with granulating technique, control material suitable particle size and can effectively avoid the bonding phenomenon occurring in material roasting process simultaneously.By regulating the output control fused salt internal circulating load of molten salt circulating pump, effectively index drum reactor temperature distribution evenness along its length, guarantees that material has suitable reaction temperature interval in reactor overall process; By index drum rotating speed, effectively control the time of material roasting in reactor simultaneously.Molten salt pipeline whole process using companion heat, plays preheating and the front emptying effect of blowing out before startup.This technique can realize continuous feed, discharging, exerts oneself large; The time of staying of material in reactor is long and do not have dead band, and quality of finished is stable, extraction efficiency is high, the cycle of operation is long, easy operating control, the advantage such as energy-conservation.
Claims (1)
1. a constant temperature revolution calciner, it is characterized in that, comprise fusion tank (1), fusion tank (1) top is provided with molten salt circulating pump (2), the inlet duct of molten salt circulating pump (2) is deeply to fusion tank (1) bottom, the outlet conduit of molten salt circulating pump (2) connects molten salt heater (3) inlet duct, fused salt is connected to the cylinder reactor inlet header (4) of cylinder reactor (5) from molten salt heater (3) outlet conduit, the cylinder reactor outlet header (7) of cylinder reactor (5) is connected with fusion tank (1), in cylinder reactor (5), be provided with cylinder reactor heat exchanger tube (6), the cylinder reactor content of cylinder reactor (5) one end is connected with the outlet of material comminutor (8) to entrance (9), cylinder reactor (5) other end is provided with grog outlet (10) and heat exchanger exhaust outlet (11), cylinder reactor content exports (10) to entrance (9) horizontal level higher than grog.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320385278.6U CN203540498U (en) | 2013-07-01 | 2013-07-01 | Constant-temperature rotary roasting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320385278.6U CN203540498U (en) | 2013-07-01 | 2013-07-01 | Constant-temperature rotary roasting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203540498U true CN203540498U (en) | 2014-04-16 |
Family
ID=50458668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320385278.6U Expired - Lifetime CN203540498U (en) | 2013-07-01 | 2013-07-01 | Constant-temperature rotary roasting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203540498U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103394308A (en) * | 2013-07-01 | 2013-11-20 | 中国华能集团清洁能源技术研究院有限公司 | Constant temperature rotary roasting system heated by molten salt and technology thereof |
-
2013
- 2013-07-01 CN CN201320385278.6U patent/CN203540498U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103394308A (en) * | 2013-07-01 | 2013-11-20 | 中国华能集团清洁能源技术研究院有限公司 | Constant temperature rotary roasting system heated by molten salt and technology thereof |
| CN103394308B (en) * | 2013-07-01 | 2016-01-13 | 中国华能集团清洁能源技术研究院有限公司 | A kind of constant temperature adopting fused salt to heat turns round roasting system and technique thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140416 |
|
| CX01 | Expiry of patent term |