CN1004299B - Cement raw material powder vertical cylinder preheater system - Google Patents
Cement raw material powder vertical cylinder preheater system Download PDFInfo
- Publication number
- CN1004299B CN1004299B CN85109480.5A CN85109480A CN1004299B CN 1004299 B CN1004299 B CN 1004299B CN 85109480 A CN85109480 A CN 85109480A CN 1004299 B CN1004299 B CN 1004299B
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- CN
- China
- Prior art keywords
- vertical cylinder
- raw material
- material powder
- preheater
- cylindrical shell
- 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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Links
- 239000000843 powder Substances 0.000 title claims abstract description 23
- 239000004568 cement Substances 0.000 title claims abstract description 15
- 239000002994 raw material Substances 0.000 title abstract description 5
- 230000001603 reducing effect Effects 0.000 claims description 23
- 239000006185 dispersion Substances 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 abstract description 14
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 5
- 239000000428 dust Substances 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 230000000087 stabilizing effect Effects 0.000 abstract 1
- 238000005728 strengthening Methods 0.000 abstract 1
- 235000012054 meals Nutrition 0.000 description 12
- 238000000926 separation method Methods 0.000 description 6
- 239000007789 gas Substances 0.000 description 4
- 239000011449 brick Substances 0.000 description 3
- 238000004080 punching Methods 0.000 description 3
- 238000012797 qualification Methods 0.000 description 3
- 239000002912 waste gas Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000001186 cumulative effect Effects 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 206010011416 Croup infectious Diseases 0.000 description 1
- 238000007630 basic procedure Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Images
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
- Y02P40/121—Energy efficiency measures, e.g. improving or optimising the production methods
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Furnace Details (AREA)
- Cyclones (AREA)
Abstract
A new cement raw material powder vertical cylinder preheater system is composed of a preheater cylinder body 5, a hyperbolic necking 4 and a spreader 6 in the cylinder body 5, and two-stage cyclone separators 2 and 1 at the top of the vertical cylinder. The device can fully disperse raw material powder under the action of jet airflow, effectively exchange heat, reasonably stack, uniformly feed, reduce material consumption and improve quality. The invention comprises a double-curve necking structure, a material spreader structure and a new process of using a series connection two-stage cyclone separator as a dust collector. It features that three measures are combined organically to obtain the final effect of strengthening preheating, stabilizing operation and increasing production and saving energy of kiln system.
Description
The invention relates to a kind of structural system of manufacture of cement, specifically about the new structural system of a kind of cement raw meal shaft preheater.
The basic procedure of the domestic Krupp type vertical cylinder pre-heating system for manufacture of cement is at present: at the cylindrical shell of the perpendicular upright inner lining refractory of cement rotary kiln afterbody, the domatic reducing of positive cone that cylinder Nei You tri-road refractory materialss are built into, vertical tube top series connection primary cyclone.The high-temp waste gas that goes out rotary kiln enters vertical tube from vertical tube bottom, during by per pass reducing, accelerated again, be the high temperature alms bowl of jet-like and carry out heat exchange with the cement raw meal adding from vertical tube top, go out the waste gas of vertical tube by the further Conveyance of cyclonic separator, raw meal powder enters vertical tube, and gas goes out cyclonic separator and leaves this system.
Adopt the vertical cylinder pre-heating system using at present, can make to expect that powder rises to 700 ℃ of left and right from normal temperature and enters kiln, but in process of production, for the cumulative positive cone reducing of relative reduction in area, pile up the suffered compaction force of material powder on the conical surface also cumulative, in the time sliding, friction resistance is larger, easily forms large agglomerate, and the slope of positive cone reducing is longer, agglomerate size is larger.Raw meal powder bulk deposition is on reducing slope, agglomerating undershoot randomly again, raw meal powder particle can not be fully exposed in hot gas, heat exchange efficiency is low, often occur punching material, alter material phenomenon, operation is difficult for stable, and because of the one-level cyclone cylinder of only connecting, Conveyance effect is poor, affects raw material and enter the qualification rate of kiln.
The object of the present invention is to provide a kind of improved vertical cylinder pre-heating system, it can improve heat exchange efficiency and separation efficiency, makes the thermo-efficiency of cement rotary kiln and separation efficiency reach best match state.
1. secondary cyclone,
2. primary cyclone,
3. raw meal powder adds hand-hole,
4. hyperbolic type reducing,
5. shaft preheater cylindrical shell,
6. dispersion device,
A. the first alms bowl body,
B. the second alms bowl body,
C. the 3rd alms bowl body.
The vertical cylinder pre-heating system for raw cement powder proposing according to the present invention, mainly comprise preheater cylindrical shell 5 and primary cyclone 2, it is characterized in that being provided with hyperbolic type reducing 4 and dispersion device 6 in said preheater cylindrical shell 5, above cylindrical shell, be provided with two-stage tandem cyclonic separator 1.
Shaft preheater cylindrical shell 5 of the present invention is made up of known method, and outside is metal shell, and the refractory materials of liner can be refractory brick, can be also heat resistance concrete.
Hyperbolic type reducing 4 is by the pouring of heat resistance concrete entirety, also can be by laying fireproof bricks, combine as a whole with cylindrical shell 5 inwalls, hyperbolic type reducing can Shi Er road, three Dao Huo tetra-roads, but preferably three roads, reducing has constant shrinking percentage, and the domatic hyperbolic type that is of reducing makes to pile up cement raw meal on it or the agglomerate of formation and is easy to landing.Relative reduction in area is between 0.6～1.4.
For the agglomerate that makes to form on hyperboloid can form little agglomerate after falling, to improve heat exchange efficiency, in the second alms bowl C of preheater cylindrical shell 5, also can in the second alms bowl B and the 3rd alms bowl C, dispersion device 6 be set simultaneously.Resistant to elevated temperatures metal ring and supporting mechanism that dispersion device 6 is not waited by multiple diameters are made (seeing accompanying drawing 2), at regular intervals between metal ring, when agglomerate on reducing is domatic slides, just in time hit on metal ring, the raw meal powder crashing leaked the air-flow being sprayed by reducing from clash into the gap of encircling further to be disperseed.
In order to improve the separation efficiency of pre-heating system, at vertical tube top series connection two stage cyclone separator 1 and 2, make the separation efficiency of the system of former string primary cyclone 2 rise to 96% left and right by 80%, reduced the flying dust in waste gas, improved raw material and entered kiln qualification rate.
Advantage of the present invention is clearly.Have the hyperboloid reducing of constant shrinking percentage, pile up material powder compactibility on it relatively stable, the agglomerate of formation is little, easily landing, and the size of agglomerate does not also increase with reducing slope is long.Annular collision type dispersion device can make the material group of the domatic upper landing of hyperbolic crash, and raw meal particulate is exposed in hot gas flow completely, and heat exchange efficiency obviously improves, and has prevented punching material phenomenon, makes production operation stable.String improves 16% left and right with two stage cyclone separator than the string separation efficiency of primary cyclone, has reduced flying dust, has improved raw meal powder and has entered kiln qualification rate.
Implementation example, with reference to accompanying drawing 1, accompanying drawing 2.
Take the shaft preheater of 7 tons of cement clinkers per hour as example: make 2500 millimeters of φ by method well-known in the art, the cylindrical shell 5 of inner lining refractory block, cylindrical shell 5 is high 19 meters, on cylindrical shell 5 top increase in pipeline, have the raw meal powder ingate 3 of 200 millimeters of φ, on the inwall of cylindrical shell 5 with fire-resistant brick three road hyperbolic type reducings 4, the shrinking percentage C=0.85 that it is constant, reentrant diameter is 1.35 meters, the distance of upper and lower two road reducings is reentrant diameter 2.8 times.The ring-like dispersion device 6 of collision type is set in the middle of in the 3rd alms bowl C.The resistant to elevated temperatures stainless steel ring of the ring-like dispersion device You San of said collision type road different diameter and three supporting legs form, and the diameter of ring is respectively 400 millimeters of φ, 800 millimeters of 600 millimeters of φ and φ.Stainless steel ring is welded on supporting leg, and three supporting legs are fixed on the inwall of cylindrical shell 5, the two pairs of cyclonic separators 1 and 2 of connecting above cylindrical shell 5, and the ash output hole of cyclonic separator all leads to the top of preheater.
Raw meal powder is sent into the feeding mouth 3 at shaft preheater top by pneumatic pump, bring tandem type cyclonic separator 2 and 1 into air-flow, after Conveyance, gas goes out separator 1 and leaves away, material powder enters in cylindrical shell the first alms bowl A, disperseed by reducing place jet-stream wind, some material pruinescence is carried rising reentry cyclonic separator 2 and 1 secretly, most of material powder sinks at internal perisporium place, be deposited in reducing 4 domatic upper, after heap reaches to a certain degree, agglomerating random landing, enter in the second alms bowl B and disperseed by the second alms bowl reducing jet-stream wind again, repeat said process.When being deposited in, material on reducing 4 slopes group is excessive, and landing is got off while dispersion not as good as injected air-flow afterwards, just spreads to hit on annular dispersion device and is further disperseed, and finally enters kiln.
Adopt after system of the present invention, make to expect that powder disperses, agglomeratingly repeatedly carries out, avoided material powder agglomerate punching material, both guaranteed separation efficiency, improved again heat exchange efficiency, play Increasing Production and Energy Saving effect.
Claims (3)
1, a kind of vertical cylinder pre-heating system for raw cement powder, comprising preheater cylindrical shell 5 and primary cyclone 2, it is characterized in that: in said preheater cylindrical shell 5, be provided with hyperbolic reducing 4 and dispersion device 6, the top of preheater cylindrical shell is provided with secondary series type cyclonic separator 1.
2, vertical cylinder pre-heating system for raw cement powder according to claim 1, is characterized in that dispersion device 6 is that resistant to elevated temperatures metal ring and the supporting mechanism not waited by multiple diameters made.
3, dispersion device 6 according to claim 2, is characterized in that between metal ring at regular intervalsly, when the agglomerate on reducing is domatic slides, just in time hits on metal ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85109480.5A CN1004299B (en) | 1985-12-30 | 1985-12-30 | Cement raw material powder vertical cylinder preheater system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85109480.5A CN1004299B (en) | 1985-12-30 | 1985-12-30 | Cement raw material powder vertical cylinder preheater system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85109480A CN85109480A (en) | 1987-07-08 |
| CN1004299B true CN1004299B (en) | 1989-05-24 |
Family
ID=4796356
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN85109480.5A Expired CN1004299B (en) | 1985-12-30 | 1985-12-30 | Cement raw material powder vertical cylinder preheater system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1004299B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT515421B1 (en) * | 2014-02-25 | 2015-09-15 | Holcim Technology Ltd | Apparatus for preheating cement raw meal for cement clinker production |
-
1985
- 1985-12-30 CN CN85109480.5A patent/CN1004299B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN85109480A (en) | 1987-07-08 |
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