CN1009270B - Process and equipment of vertical kiln with ring section - Google Patents
Process and equipment of vertical kiln with ring sectionInfo
- Publication number
- CN1009270B CN1009270B CN 87102196 CN87102196A CN1009270B CN 1009270 B CN1009270 B CN 1009270B CN 87102196 CN87102196 CN 87102196 CN 87102196 A CN87102196 A CN 87102196A CN 1009270 B CN1009270 B CN 1009270B
- Authority
- CN
- China
- Prior art keywords
- kiln
- core pipe
- vertical kiln
- shaft
- zone
- 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.)
- Expired
Links
- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000009423 ventilation Methods 0.000 claims abstract description 14
- 238000001816 cooling Methods 0.000 claims abstract description 11
- 239000004568 cement Substances 0.000 claims abstract description 8
- 238000007599 discharging Methods 0.000 claims abstract description 6
- 239000004744 fabric Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 239000011449 brick Substances 0.000 claims 1
- 238000002485 combustion reaction Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- 238000001354 calcination Methods 0.000 abstract description 8
- 239000004615 ingredient Substances 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 238000009692 water atomization Methods 0.000 description 1
Landscapes
- Muffle Furnaces And Rotary Kilns (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention relates to a process and device for a vertical kiln with an annular section for calcining cement clinker. The process is characterized in that an inner ring made of a core pipe is arranged in a vertical kiln with a round section, and the core pipe is used as a ventilation pipe.Air and steam are supplied into a cooling zone and a preheating zone, which are arranged at the middle part of the vertical kiln so as to accelerate calcination and cooling. The core pipe can move from top to bottom. Proper ingredients and mineralizers are adopted. A hydraulic driven charging and discharging device is designed. The vertical kiln solves the problem of unfavorable central ventilation existing in an ordinary vertical kiln. The temperature field in the vertical kiln is uniform, and CO heat loss is reduced. Compared with the ordinary vertical kiln, the yield can be increased by 5 to 10%, the heat consumption is reduced by 8 to 15%, and the clinker grade is increased by 50 to 100. The vertical kiln is particularly superior to a vertical kiln with a large diameter.
Description
The present invention relates to the calcining process and the equipment of cement clinker.
The machine shaft kiln has that equipment is few, and floor space is little, and reduced investment is built soon, and energy consumption is low, and series of advantages such as burning low grade coal have very strong vitality in Cement industry.China is from the sixties, and shaft kiln develops rapidly, and shaft kiln cement output accounts for 70% of China's cement total output at present.But for a long time, shaft kiln is rounded section entirely.The basic weakness that this kiln shape is difficult to overcome is the kiln wall effect, and central ventilation is bad, limit wind surplus, the thermal regulation instability, because kiln ventilation is inhomogeneous, the temperature field is inhomogeneous on the interior sustained height cross section of kiln, the kiln fire in a stove before fuel is added is dark, and clinker quality is inhomogeneous, and the carbon monoxide thermosteresis is big.And this weakness becomes more outstanding along with the increase of kiln diameter, because fire in a stove before fuel is added pull and stretch, the kiln middle part forms dead space.Domestic many cement work persons though done many researchs, try hard to address this problem, and such as short and thick kiln, coil tower dumper, rising central ventilation pipe, center cone method.But all do not deal with problems, its reason is not break through from technological principle.Owing to concentrate on, over nearly 30 years, shaft kiln is studied almost blank wall abroad, to the outer decomposition technique research of kiln.
The objective of the invention is to create a kind of new Cement Calcination in Vertical Kiln Processes and apparatus.Improve kiln ventilation and temperature distribution state, improve burning quality, reduce hear rate, and then realize that shaft kiln maximizes; Its superiority can be competed mutually with nsp kiln fully.
The objective of the invention is to realize in the following manner.One core pipe is set as interior ring in rounded section machine shaft kiln, forms vertical kiln with ring section, its core pipe is as ventilation duct.Part wind enters from core pipe bottom blast inlet, by the core pipe to kiln middle part cooling zone and preheating zone air intake, can also water flowing steam, quickening calcining, thereby solve the bad problem of shaft kiln central ventilation with cooling.The kiln temperature field is even.For adapting to this kiln type, prevent centre junction bulk and sizing, its batching grog saturation ratio is 0.88-0.97, the silicon rate is 1.8～2.7, can be mixed with suitable mineralizer, promotes that the core pipe moves up and down or motionless with transmission system.The interior ring sectional area of establishing in its rounded section kiln accounts for the long-pending 3-15% of rounded section.Core pipe ventilation refrigerative ventilation accounts for the 5-15% of full blast amount.Wind concentricity wind in the end can also have with the water vapor after the water atomization, and its effect is that calcining of acceleration preheating zone and cooling zone cool off grog fast, reduces the Co thermosteresis.
The vertical kiln with ring section of the present invention's design, mainly by distribution device (5), chimney kiln hood (2), cylindrical shell (7), kiln lining (8), core pipe (9), discharge funnel (13), material seal apparatus formations such as (16), it is characterized in that core pipe (9) pushes up to kiln from the kiln end stretch, with the coaxial looping of cylindrical shell (7) cross section shaft kiln, have blast inlet (a) in core pipe (9) bottom, on kiln top preheating belt carcass pipe perisporium, have the aperture (b) of giving vent to anger more than two, on cooling belt carcass pipe perisporium, have the aperture (c) of giving vent to anger more than two, be built into the tubaeform of the little one-tenth certain taper of the big top of following diameter diameter at calcining zone kiln lining (8).Core pipe (9) is manufactured with heat-resisting steels, and the outer wall bag is built refractory materials (10) and temperature measuring equipment.The inherent different heights of core pipe is established temperature measuring equipment.Core pipe bottom is connected with shaft coupling (14) with hydraulic efficiency system (15), and core pipe top hauls with the wireline that the core pipe lifts under the oil cylinder (1), and hydraulic efficiency system push-and-pull core pipe moves up and down.Distribution device (5) lifts anti-device (4) and the cloth scraper-trough conveyer deceleration device (3) turned round of oil cylinder by distribution device and drives revolution and swing up and down, and minimum angle is 90 °, allows expect to spread interior ring core tube edge.Swing dumping device (11) is adopted in discharging, and the discharging cloth adopts hydraulic efficiency system (12) transmission.
The present invention changes the shaft kiln rounded section into ring section, adds interior ring core pipe as ventilation duct, at kiln middle part cooling zone, but the equal air intake in preheating zone, water flowing steam is to quicken calcining and to cool off.Thereby solved the bad problem of old-fashioned shaft kiln central ventilation, the kiln temperature field is even, has eliminated kiln fire in a stove before fuel is added pull and stretch phenomenon.Cloth dumping device and core pipe move up and down and all adopt hydrostatic transmission, and working condition is steadily reliable.This vertical kiln with ring section can be used as product innovation and uses, and also can carry out old shaft kiln according to this technological principle and transform.This kiln with compare with scale Portland cement shaft kiln, output can improve 5-10%, hear rate reduces 8-15%, the grog label improves 50-100 number.
Fig. 1 is the vertical kiln with ring section overall construction drawing.
Fig. 2 is that ordinary shaft kiln respectively is with distribution schematic diagram.
Fig. 3 is that vertical kiln with ring section respectively is with distribution schematic diagram.
Each sequence number On Behalf Of The Name of Fig. 1 is as follows:
(1) core pipe push cylinder, (2) chimney kiln hood, (3) cloth scraper-trough conveyer deceleration device, (4) distribution device lifts the anti-device of turning round of oil cylinder, (5) distribution device, (6) chimney, (7) cylindrical shell, (8) kiln lining, (9) core pipe, (10) heat-stable material bag course, (11) pendulum-type dumping device, (12) discharging cloth hydraulic efficiency system, (13) discharge funnel, (14) shaft coupling, (15) promote the core pipe hydraulic efficiency system that moves up and down, (16) material seal apparatus, (17) vibration discharger, (18) airduct that gathers dust, (19) base, (20) column, (a) core pipe intake opening, the perforate of (b) cooling belt carcass pipe, the perforate of (c) preheating belt carcass pipe.
Sequence number among Fig. 2, Fig. 3 (1) preheating zone, (2) thermal zone, (3) cooling zone.
Fig. 2, Fig. 3 are the temperature distribution of test kiln observation, can find out obviously that vertical kiln with ring section respectively is with uniformity of temperature profile, and thermal zone being with moved, and thermal zone molten mass distortion is little, and pot shape does not appear in the kiln face.
Claims (7)
1, a kind of method of improving cement in vertical kiln kiln ventilation and uniformity of temperature profile, it is characterized in that by in the shaft kiln kiln from a core pipe is set to kiln top at the bottom of the kiln, as interior ring ventilation duct, have blast inlet in core pipe bottom, all have plural at least hole at preheating zone, kiln top, cooling zone, wind or the wind that has atomizing back steam are introduced from air port, core pipe bottom, and its air quantity accounts for the 5-15% of total blast volume.
2, the shaft kiln that is used for claim 1 method, mainly lift oil cylinder 1, dumping device 11, discharge funnel 13, expect that seal apparatus 16, hydraulic efficiency system 14 constitute by distribution device 5, chimney kiln hood 2, cylindrical shell 7, kiln lining 8, core pipe 9, core pipe, it is characterized in that core pipe 9 extends the kiln top always at the bottom of kiln, with cylindrical shell 7 coaxial looping cross section shaft kilns, have blast inlet a in core pipe bottom, core pipe perisporium at preheating zone, kiln top, cooling zone has two production well b, c at least, and kiln lining 8 is built into inverted tubaeform at the kiln zone of combustion.
3, as shaft kiln as described in the claim 2, the ring sectional area accounts for the long-pending 3-15% of rounded section in it is characterized in that.
4, as shaft kiln as described in the claim 2, it is characterized in that the effective heat-resisting steel material of core makes, outer wall is surrounded by refractory brick 10.
5, shaft kiln as claimed in claim 2 is characterized in that core pipe 9 bottoms and hydraulic efficiency system 14 join, and core pipe top lifts oil cylinder 1 with the core pipe and links to each other, and hydraulic efficiency system push-and-pull core pipe moves up and down.
6, as shaft kiln as described in the claim 2, it is characterized in that discharging adopts swing dumping device 11, the discharging cloth adopts hydraulic efficiency system 12.
7, shaft kiln as claimed in claim 6 is characterized in that distribution device 5 lifts anti-device 4 and the cloth scraper-trough conveyer deceleration device 3 turned round of oil cylinder by distribution device and drives revolution and swing up and down, and allows material can spread interior ring limit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87102196 CN1009270B (en) | 1987-03-20 | 1987-03-20 | Process and equipment of vertical kiln with ring section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87102196 CN1009270B (en) | 1987-03-20 | 1987-03-20 | Process and equipment of vertical kiln with ring section |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN87102196A CN87102196A (en) | 1987-08-26 |
| CN1009270B true CN1009270B (en) | 1990-08-22 |
Family
ID=4813858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87102196 Expired CN1009270B (en) | 1987-03-20 | 1987-03-20 | Process and equipment of vertical kiln with ring section |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1009270B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100339672C (en) * | 2003-07-21 | 2007-09-26 | 大连理工大学 | Screw type cement/ceramsite calcining kiln |
-
1987
- 1987-03-20 CN CN 87102196 patent/CN1009270B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN87102196A (en) | 1987-08-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| C10 | Entry into substantive examination | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |