CN102288022A - Sleeve-type gas-burning shaft kiln - Google Patents
Sleeve-type gas-burning shaft kiln Download PDFInfo
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- CN102288022A CN102288022A CN201110155837XA CN201110155837A CN102288022A CN 102288022 A CN102288022 A CN 102288022A CN 201110155837X A CN201110155837X A CN 201110155837XA CN 201110155837 A CN201110155837 A CN 201110155837A CN 102288022 A CN102288022 A CN 102288022A
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- 238000001354 calcination Methods 0.000 claims abstract description 67
- 230000002093 peripheral effect Effects 0.000 claims abstract description 37
- 239000007789 gas Substances 0.000 claims abstract description 21
- 238000001816 cooling Methods 0.000 claims abstract description 15
- 238000007514 turning Methods 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 21
- 239000011449 brick Substances 0.000 claims description 18
- 238000005192 partition Methods 0.000 claims description 10
- 210000003050 axon Anatomy 0.000 claims description 8
- 239000000446 fuel Substances 0.000 claims description 8
- 239000000567 combustion gas Substances 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 5
- 239000003245 coal Substances 0.000 claims description 4
- 230000007246 mechanism Effects 0.000 claims description 4
- 230000000630 rising effect Effects 0.000 claims description 4
- 239000002737 fuel gas Substances 0.000 abstract description 9
- 238000000926 separation method Methods 0.000 abstract 1
- 239000002994 raw material Substances 0.000 description 22
- 235000019738 Limestone Nutrition 0.000 description 17
- 239000006028 limestone Substances 0.000 description 17
- 238000004519 manufacturing process Methods 0.000 description 14
- 239000004571 lime Substances 0.000 description 12
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 11
- 235000011941 Tilia x europaea Nutrition 0.000 description 11
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 239000004575 stone Substances 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 238000003837 high-temperature calcination Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000032696 parturition Effects 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000005997 Calcium carbide Substances 0.000 description 1
- 206010019332 Heat exhaustion Diseases 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
-
- 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
- Y02P40/40—Production or processing of lime, e.g. limestone regeneration of lime in pulp and sugar mills
Landscapes
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Furnace Details (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
Abstract
The invention discloses a sleeve-type gas-burning shaft kiln. An annular furnace chamber is defined by an inner cylinder body and an outer cylinder body which are sleeved together in a kiln body; the cylinder wall of the inner cylinder body is provided with a plurality of vent holes which are communicated with the annular furnace chamber and the inner cavity of the inner cylinder body; the annular furnace chamber is sequentially provided with a preheating area, a calcining area and a cooling area from top to bottom; a cylindrical furnace shell also covers the periphery of the outer cylinder body; a peripheral gas passage is defined between the inner wall surface of the cylindrical furnace shell and the outer wall surface of the outer cylinder body; vent holes which are communicated with the annular furnace chamber and the peripheral air passages are distributed on the cylinder wall of the outer cylinder body; the inner cavity of the inner cylinder body and the peripheral air passages are axially provided with radial separating structures along the kiln body alternatively in a staggered mode, wherein the radial separating structures are used for driving air flows in the kiln body to pass through the annular furnace chamber, enter the inner cavity of the inner cylinder body and the peripheral air passages and rise in a turning mode; the middle part of the inner cavity of the inner cylinder body is provided with a calcining chamber corresponding to the calcining area in the annular furnace chamber in a separation mode through two layers of radial separating structures which are arranged axially along the kiln body at intervals; and the calcining chamber is internally communicated with a high-temperature gas conveying pipe or a fuel gas conveying pipe.
Description
Technical field
The invention belongs to the high-temperature calcination production technical field of materials such as lime, magnesium metal, definite saying so relates to a kind of vertical type calcining kiln.
Background technology
Along with the development of metallurgical industry, improving constantly of calcining technology and technology makes China have higher requirement to the quality of slag former-lime main in magnesium metal, the STEELMAKING PRODUCTION.Existing calcining kiln mainly contains earth kiln, rotary kiln and shaft kiln.Earth kiln production efficiency is low, pollution is big, and the lime impurity content of its production is big, active low, and its product is mainly used in building field, and use at present has been under an embargo; And the rotary kiln device volume is bigger, and floor space is bigger, and it is higher to consume energy.Shaft kiln claims shaft furnace again, and the eighties in last century, shaft kiln is little with its floor space, power consumption is low and can use the characteristics of fuel of lower heating value to be used widely in China.Shaft kiln is divided into traditional shaft kiln and sleeve kiln again, the tradition shaft kiln is because the calcining zone volume is bigger, thereby to the requirement for restriction of the granularity of raw material higher (being limited in 70～150 mm scopes), being above standard to influence the interior gas permeability of kiln, cause the inside and outside temperature of calcining zone unbalanced, burning occurs or give birth to and burn phenomenon, make its unstable product quality.
If existing sleeve kiln owner is by the Beckenbach kiln of German Ka Er Beckenbach in invention, this Beckenbach kiln is introduced China the nineties, the kiln body of this kiln is made two concentric cylindrical shells by steel plate and shaped steel weldering, and the outside of inner sleeve and outer sleeve liner are built by laying bricks or stones with basic brick, high-alumina brick and clay brick respectively.Inner core divides upper and lower two independent sectors, and top is last inner core, and the bottom is following inner core.Inner core forms the cylindrical steel plate case by double-decker up and down, and the chuck between the two-layered steel plates is sent into air and cooled off continuously to prevent its high temperature deformation.Inner core and urceolus arranged concentric form an annular space, and lime stone is just calcined in this annular region.The lime that adopts this Beckenbach kiln sleeve kiln to produce has porosity height, surface area is big, active high characteristics, but all there is complex structure in existing sleeve kiln, manufacturing cost height and installation and maintenance are the shortcoming of difficulty comparatively, make that the business capital input of this sleeve kiln of use is bigger, and, this sleeve kiln need use many typhoons machine respectively its inner core to be cooled off, for burning provides the spraying cycle air and extracts waste gas in the kiln out, make that the flow and the pressure of the interior gas of this sleeve kiln are bigger, it is had relatively high expectations to the requirement of material and workman's operation, heat exhaustion is higher, cause its production cost higher relatively, applying of sleeve kiln caused obstacle.
Chinese patent open file CN101195520A discloses a kind of vertical continuous calcination lime burner, it comprises columnar kiln body, the top of kiln body is provided with closes the wind feed arrangement, the top of kiln intracoelomic cavity is provided with distribution device, the furnace chamber of distribution device below is provided with the preheating zone successively, calcining zone and cooling zone, the discharging opening below of cooling zone is provided with continuous drawing mechanism, the top of kiln body also is provided with exhaust opening, also be axially arranged with the hot blast air-out passage that extends to the preheating zone at the middle part of kiln intracoelomic cavity, this hot blast air-out passage is separated into circulus with the furnace chamber in the kiln body, radially offer some passages on the conduit wall of hot blast air-out passage, and be equipped with the radially bocca of flame on the kiln body sidewall of calcining zone being positioned at.This vertical continuous calcination lime burner is greatly simplified with respect to the structure of Beckenbach sleeve kiln, but this vertical continuous calcination lime burner can only the bigger block stone material of machining shape volume, and for volume less powdery or graininess stone material, then can't calcine, otherwise powdery or graininess stone material can enter the hot blast air-out passage by the passage from hot blast air-out passage owing to the flame interaction that sprays in the bocca, cause the waste of big content of starting materials, and, in the lime burning process, if the excessive whereabouts of causing vapour lock to stop raw material easily of the combustion-gas flow that sprays in the bocca, the limekiln can't be produced continuously, reduce the production efficiency in limekiln, can cause near the living burning of the part material of hot blast access way outer wall if the air-flow of torch firing is less, influence product quality; Simultaneously, because pulverizing jet transverse injection flame, make that the outer material near pulverizing jet is unbalanced with the temperature between the close internal layer material of hot blast access way in the annular furnace chamber, outer material is subjected to thermal-flame to calcine easy burning, and the internal layer material is subjected to flame to influence the less easy burning of giving birth to, and influences the steady quality of product.
Summary of the invention
The objective of the invention is: a kind of telescopic gas-burned vertical limekiln that can be used for calcining the stone material raw material of different sizes or shape is provided.
The technical scheme of telescopic gas-burned vertical limekiln of the present invention is: a kind of telescopic gas-burned vertical limekiln, comprise the kiln body, the bottom of kiln body is provided with air inlet, the top is provided with exhaust opening, be arranged with annular furnace chamber by suit inner barrel and outer cylinder body together in the described kiln body, offer the passage of annular furnace chamber of some connections and inner barrel inner chamber on the barrel of inner barrel, described annular furnace chamber is provided with the preheating zone from top to bottom successively, calcining zone and cooling zone, top/bottom part at annular furnace chamber is respectively equipped with charging aperture and discharging opening, also be covered with a tubular furnace shell in described outer cylinder body periphery, be arranged with peripheral airway between the internal face of this tubular furnace shell and the outside wall surface of outer cylinder body, be laid with the passage that is communicated with annular furnace chamber and peripheral airway on the barrel of outer cylinder body, in described inner barrel inner chamber and peripheral airway along the kiln axon to alternate be laid staggeredly to be useful on order about in the kiln body air-flow and pass annular furnace chamber and alternately enter inner barrel inner chamber and peripheral airway, the radially partition-type structures of turning back and rising, described inner barrel inner chamber middle part by along the kiln axon to the two layers of radial partition-type structures that is provided with at interval every be provided with annular furnace chamber in the corresponding calcining compartment of calcining zone, be communicated with high-temperature gas appendix or combustion gas appendix in this calcining compartment.
Described air inlet is opened in the bottom of furnace shell, described radially partition-type structures mainly is located at first dividing plate of peripheral airway bottom near the air inlet place by middle part, the described cooling zone of correspondence radial loop, corresponding described cooling zone and calcining zone junction be the second partition in being located at the inner barrel inner chamber radially, corresponding described calcining zone middle part radial loop is located at the 3rd dividing plate in the peripheral airway, the 5th dividing plate composition in the peripheral airway is located in corresponding described preheating zone and calcining zone junction radially the 4th dividing plate in being located at the inner barrel inner chamber and middle part, corresponding described preheating zone radial loop, bottom at furnace shell is provided with air inlet, and the top of furnace shell is provided with exhaust opening.
Mainly by forming to the horizontal segment that installs the vertical segment that is fixed on the second partition and laterally be installed on kiln body bottom along the kiln axon, the upper end of vertical segment extend in the described calcining compartment for described high-temperature gas appendix or combustion gas appendix.
Top at described inner barrel inner chamber also is provided with heat exchanger, heat exchanger is mainly by the air collecting chamber on top be inserted into some the composition along the axially extended heat exchanger tube of kiln body of air collecting chamber bottom, each heat exchanger tube installs and is fixed on described the 4th dividing plate, is provided with the air inlet pipe that is communicated with ambient atmosphere on air collecting chamber.
The barrel of described inside and outside cylindrical shell mainly by the refractory brick with through hole successively bond constitute, the through hole on each refractory brick is tilted to respectively to being arranged in the corresponding outer aperture extension of peripheral airway or inner barrel inner chamber by the inner orifice that is arranged in annular furnace chamber.
Described each refractory brick be arranged on the internal face of annular furnace chamber respectively along the kiln body radially convex with fin, surround annular with the fin on each refractory brick of one deck, thereby in annular furnace chamber, form the choking coil that axially spaced-apart ring is from top to bottom established.
Discharging opening bottom at described annular furnace chamber also is provided with funnel shaped drawing mechanism.
Described fuel charge device comprises and is installed in the charge pipe that is positioned on the kiln body of calcining zone top, is provided with reinforced auger in the charge pipe, is equipped with coal bunker on the furnace shell outer wall on charge pipe top, and the bottom of coal bunker is provided with the feed opening that is communicated with charge pipe.
Also be provided with the material distributing cone that cooperates with annular furnace top of chamber annular charging aperture at the top of described inner barrel.
Shaft furnace of the present invention is simple in structure, it forms three layers of tube-in-tube structure by furnace shell and inside and outside cylindrical shell, adopt autonomous burning of fuel and negative pressure inlet mode, cancelled the torch firing device, reduced the wind speed of air-flow in the kiln body calcining zone, guarantee the even whereabouts of lime stone raw material and fuel, thereby realized the calcining of powdery or granular minor diameter lime stone raw material, avoided the waste of raw material; Simultaneously, shaft furnace of the present invention utilizes the deadweight of material to realize the self-emptying of product, by high-temperature gas appendix or continual high-temperature gas or the fuel gas in calcining compartment, carried of combustion gas appendix, the heat that high-temperature gas or fuel gas produce in the calcining compartment internal combustion enters into the calcining zone of annular furnace chamber the lime stone raw material is calcined by the passage on the inner tube wall, the conveying capacity that enters the high-temperature gas of calcining compartment or fuel gas by control is controlled the temperature in the body of heater, prevent burning or give birth to the burning phenomenon, it has simplified the operation in limekiln, reduce the construction cost in limekiln, control is simple, convenient, be convenient to product quality is managed, and, it utilizes along the axial alternate radially partition-type structures that is laid staggeredly in peripheral airway and inner barrel inner chamber in the kiln body, make the gas rising of in the kiln body, turning back, can make on the one hand that fuel obtains enough air-breathings in the calcining, improve efficiency of combustion, guarantee in the annular furnace chamber uniformity of temperature everywhere, prevent that further the burning phenomenon from appearring giving birth in the lime stone raw material, the heat that can utilize calcining to produce is on the other hand fully realized raw material and preheating of air synchronously, the heat utilization efficiency height, thereby reduced the consumption of fuel, had good energy-saving effect.
Description of drawings
Fig. 1 is the structural representation of telescopic gas-burned vertical limekiln specific embodiment of the present invention.
The specific embodiment
The specific embodiment of telescopic gas-burned vertical limekiln of the present invention as shown in Figure 1, the kiln body of this shaft furnace is mainly formed with the coaxial outer cylinder body 2 and the inner barrel 3 that are made of refractory material in the furnace shell 1 of being set in by being installed in the tubular furnace shell 1 that is made of insulation material on the pedestal 14, inner barrel 3, outer cylinder body 2 and three layers of sleeve kiln structure of furnace shell 1 common formation, wherein, inner barrel 3 and outer cylinder body 2 mainly by refractory brick successively bond constitute, the inner chamber of inner barrel 3 forms axially extended hollow pipeline 6, form axially extended annular furnace chamber 5 between inner barrel 3 and the outer cylinder body 2, between furnace shell 1 and outer cylinder body 2, surround the peripheral airway 4 of axially extended annular, on the barrel of inner barrel 3 and outer cylinder body 2, offer some be used to the be communicated with hollow pipeline 6 of inner barrel and the passages of annular furnace chamber 5 and annular furnace chamber 5 and peripheral airway 4 respectively, in the present embodiment, each passage is made of the through hole of offering on the refractory brick, through hole on the refractory brick is tilted to respectively to being arranged in peripheral airway 4 or inner barrel hollow pipeline 6 corresponding outer apertures are extended, with the through hole inflow peripheral airway 4 or hollow pipeline 6 of powder raw material from refractory brick that prevents to be fallen by annular furnace chamber 5 its top feed mouths by the inner orifice that is arranged in annular furnace chamber 5.Simultaneously, be arranged at each refractory brick on the internal face of annular furnace chamber 5 respectively and radially convex with fin along the kiln body, surround annular with the fin on each refractory brick of one deck, thereby in annular furnace chamber 5, form the choking coil that axially spaced-apart ring is from top to bottom established, make in the process that the lime stone raw material falls by deadweight in annular furnace chamber 5, the falling speed that the ectonexine of lime stone raw material slows down after stopped by choking coil, and the lime stone feed rate at center is constant, thereby the lime stone raw material is produced mixing effect, it is balanced more that the lime stone raw material is heated in annular furnace chamber, improves the quality of production of lime.
Annular furnace chamber 5 from top to bottom successively be provided with preheating zone, calcining zone and cooling zone, be provided with air inlet 12 in the bottom of furnace shell 1, top at furnace shell 1 is provided with exhaust opening, exhaust opening is provided with smoke discharging pipe 18, for guaranteeing that the kiln body can utilize the fresh cold air that is entered by air inlet 12 fully in the lime burning process, the present invention in the hollow pipeline 6 that peripheral airway 4 and inner barrel 3 surround along the axial alternate staggered radially partition-type structures that is laid with of kiln body.In the present embodiment, this radially partition-type structures mainly be located near the dividing plate 9 radially of first in the peripheral airway 4 of this air inlet 12 by middle part, the cooling zone of the annular furnace chamber 5 of correspondence, the cooling zone of corresponding annular furnace chamber 5 and calcining zone junction are located on the second partition 10 in inner barrel 3 hollow pipelines 6, the calcining zone middle part radial loop of corresponding annular furnace chamber 5 is located at the 3rd dividing plate 8 in the peripheral airway 4, middle part, the preheating zone radial loop that the preheating zone of corresponding annular furnace chamber 5 and calcining zone junction are located on the 4th dividing plate 11 in inner barrel 3 hollow pipelines 6 and corresponding annular furnace chamber 5 is located at the 5th interior dividing plate 7 of peripheral airway 4.Wherein, second partition 10, the 4th dividing plate 11 are engaged in the middle part of hollow pipeline 6 every setting out the calcining compartment corresponding with the calcining zone of annular furnace chamber 5 with the barrel of inner barrel 3, on second partition 10, install and be fixed with an appendix, mainly by forming to the horizontal segment 21 that installs the vertical segment 13 that is fixed on the second partition 10 and laterally be installed on kiln body bottom along the kiln axon, the upper end of vertical segment 13 extend in the calcining compartment this appendix.High-temperature gas or fuel gas that this appendix produces in can delivery industry producing, high-temperature gas can directly enter annular furnace chamber by the passage on the inner tube wall lime stone raw material is calcined, fuel gas can burn earlier in calcining compartment, the high-temperature gas that the burning back produces enters annular furnace chamber by the passage on the inner tube wall again the lime stone raw material is calcined, if desired, can also be in calcining compartment the mounting points firearm.
Top at the hollow pipeline 6 of inner barrel 3 also is provided with heat exchanger, this heat exchanger is mainly by the air collecting chamber 17 that is arranged on material distributing cone 19 belows and be inserted into air collecting chamber 17 bottoms and form to some heat exchanger tubes 22 of downward extension along the kiln axon, be connected with on the air collecting chamber 17 and pass the air inlet pipe 16 that inside and outside cylindrical shell 2,3 and furnace shell 1 are communicated with ambient atmosphere, the bottom plug-in mounting of each heat exchanger tube 22 is fixed on the 4th dividing plate 11.
With the fuel gas is example, this shaft furnace is in calcination process, the powdery of minor diameter or granular lime stone raw material enter through the charging aperture 20 of material distributing cone 19 from annular furnace chamber 5 tops by the top of feed mechanism from the kiln body, fuel gas such as calcium carbide tail gas, coal gas or natural gas are sent in the calcining compartment of the hollow pipeline 6 in the inner barrel 3 through appendix, fuel gas burns in calcining compartment, and the heat that burning produces enters by the passage on inner barrel 3 barrels in the calcining zone of annular furnace chamber 5 the lime stone raw material that enters into annular furnace chamber 5 is carried out high-temperature calcination.In the time of calcining, because the hot gas that burning produces enters in the peripheral airway 4 by the passage on outer cylinder body 2 barrels and enters into the preheating zone of kiln body along peripheral airway 4 risings, form negative pressure in calcining compartment, the fresh air that the air inlet pipe 16 by kiln body top will be rich in oxygen is drawn in the calcining compartment combustion-supporting through air collecting chamber 17 and heat exchanger tube 22.The hot gas that rises is stopped by the 5th dividing plate 7 in peripheral airway, thereby passing passage on outer cylinder body 2 barrels enters into annular furnace chamber 5 the lime stone raw material that is arranged in the preheating zone is carried out preheating, to strengthen the decomposition of lime stone raw material, improve the quality of production of lime, the lime stone raw material is carried out hot gas after the preheating behind the passage that passes on inner barrel 3 barrels, enter into hollow pipeline 6 tops and contact with heat exchanger tube 22 again, after-heat and heat exchanger tube 22 are carried out heat exchange will from heat exchanger tube 22, carry out preheating by the fresh air of process.Last residual air is discharged in the atmosphere through smoke discharging pipe 18.
In the time of calcining, the fresh air of another part is inhaled into from the air inlet 12 of furnace shell 1 bottom, the fresh air that is entered by furnace shell 1 bottom air inlet mouth 12 at first enters in the cooling zone of kiln body bottom, in the cooling zone, cooperate by first dividing plate 9 in the peripheral airway 4 and the second partition in the hollow pipeline 6 10, make fresh air earlier by inside and outside cylindrical shell 2, passage on 3 the barrel passes annular furnace chamber 5 and enters into the hollow pipeline 6 that is arranged in second partition 10 belows, and then by inside and outside cylindrical shell 2, passage on 3 barrels passes annular furnace chamber 5 and enters into peripheral airway 4 between first dividing plate 9 and the 3rd dividing plate 8, the high-temperature material that fresh air passes for twice after calcining in 5 pairs of annular furnace chambers 5 of annular furnace chamber cools off, thereby improved the cooling effectiveness of high-temperature material, and high-temperature material is when being cooled, it has carried out synchronous preheating to fresh air, calcining back residual waste heat on material is reused once more, thereby improved the heat utilization ratio of this shaft furnace.Air after the preheating upwards enters into calcining zone in peripheral airway 4, because stopping of the 3rd dividing plate 8, make air pass annular furnace chamber 5 by the passage on the inside and outside cylindrical shell 2,3 again and enter into calcining compartment and mix, for the combustion gas in the calcining compartment provides combustion-supporting fully with the fresh air that kiln body top air inlet pipe 16 enters.
Telescopic gas-burned vertical limekiln of the present invention simple in structure only needs once igniting or directly feeds high-temperature gas can realize long-term continuous production, operation and convenient management; The kiln body adopts the negative pressure inlet mode, and environmental-protecting performance is higher; And the air-flow wind speed in the kiln body is little, thereby can realize that the scope of application is wide, adaptive capacity is strong to the calcining of the stone material of different sizes and shape; And the heat that can make full use of the calcining generation in process of production carries out synchronous preheating to raw material and air, improves heat utilization efficiency, reduces the consumption of fuel; Fund input of the present invention is little, product quality is high, the production continuity is strong, production efficiency is high, production cost of products is low, and alternative existing calcining kiln is promoted the use of in calcining production fields such as lime, magnesium metal.
The present invention is not limited to the foregoing description, those skilled in the art be easy to expect other air intake mode according to the description of the foregoing description and be arranged on peripheral airway and the inner barrel hollow pipeline in radially partition-type structures, for example: air inlet can be arranged on inner barrel hollow pipeline bottom, thereby can cancel above-mentioned first dividing plate that is arranged in the peripheral airway; It can also set up other dividing plate on the basis of the foregoing description, increase the modes such as the number of times of turning back of air-flow, no matter how its structure or shape change, it is all within protection scope of the present invention.
Claims (9)
1. telescopic gas-burned vertical limekiln, comprise the kiln body, the bottom of kiln body is provided with air inlet, the top is provided with exhaust opening, be arranged with annular furnace chamber by suit inner barrel and outer cylinder body together in the described kiln body, offer the passage of annular furnace chamber of some connections and inner barrel inner chamber on the barrel of inner barrel, described annular furnace chamber is provided with the preheating zone from top to bottom successively, calcining zone and cooling zone, top/bottom part at annular furnace chamber is respectively equipped with charging aperture and discharging opening, it is characterized in that, also be covered with a tubular furnace shell in described outer cylinder body periphery, be arranged with peripheral airway between the internal face of this tubular furnace shell and the outside wall surface of outer cylinder body, be laid with the passage that is communicated with annular furnace chamber and peripheral airway on the barrel of outer cylinder body, in described inner barrel inner chamber and peripheral airway along the kiln axon to alternate be laid staggeredly to be useful on order about in the kiln body air-flow and pass annular furnace chamber and alternately enter inner barrel inner chamber and peripheral airway, the radially partition-type structures of turning back and rising, described inner barrel inner chamber middle part by along the kiln axon to the two layers of radial partition-type structures that is provided with at interval every be provided with annular furnace chamber in the corresponding calcining compartment of calcining zone, be communicated with high-temperature gas appendix or combustion gas appendix in this calcining compartment.
2. telescopic gas-burned vertical limekiln according to claim 1, it is characterized in that, described air inlet is opened in the bottom of furnace shell, described radially partition-type structures mainly is located at first dividing plate of peripheral airway bottom near the air inlet place by middle part, the described cooling zone of correspondence radial loop, corresponding described cooling zone and calcining zone junction be the second partition in being located at the inner barrel inner chamber radially, corresponding described calcining zone middle part radial loop is located at the 3rd dividing plate in the peripheral airway, the 5th dividing plate composition in the peripheral airway is located in corresponding described preheating zone and calcining zone junction radially the 4th dividing plate in being located at the inner barrel inner chamber and middle part, corresponding described preheating zone radial loop, bottom at furnace shell is provided with air inlet, and the top of furnace shell is provided with exhaust opening.
3. telescopic gas-burned vertical limekiln according to claim 2, it is characterized in that, mainly by forming to the horizontal segment that installs the vertical segment that is fixed on the second partition and laterally be installed on kiln body bottom along the kiln axon, the upper end of vertical segment extend in the described calcining compartment for described high-temperature gas appendix or combustion gas appendix.
4. according to claim 2 or 3 described telescopic gas-burned vertical limekilns, it is characterized in that, top at described inner barrel inner chamber also is provided with heat exchanger, heat exchanger is mainly by the air collecting chamber on top be inserted into some the composition along the axially extended heat exchanger tube of kiln body of air collecting chamber bottom, each heat exchanger tube installs and is fixed on described the 4th dividing plate, is provided with the air inlet pipe that is communicated with ambient atmosphere on air collecting chamber.
5. telescopic gas-burned vertical limekiln according to claim 1, it is characterized in that, the barrel of described inside and outside cylindrical shell mainly by the refractory brick with through hole successively bond constitute, the through hole on each refractory brick is tilted to respectively to being arranged in the corresponding outer aperture extension of peripheral airway or inner barrel inner chamber by the inner orifice that is arranged in annular furnace chamber.
6. telescopic gas-burned vertical limekiln according to claim 5, it is characterized in that, described each refractory brick is arranged on the internal face of annular furnace chamber respectively and radially convexes with fin along the kiln body, surround annular with the fin on each refractory brick of one deck, thereby in annular furnace chamber, form the choking coil that axially spaced-apart ring is from top to bottom established.
7. telescopic gas-burned vertical limekiln according to claim 1 is characterized in that, also is provided with funnel shaped drawing mechanism in the discharging opening bottom of described annular furnace chamber.
8. telescopic gas-burned vertical limekiln according to claim 1, it is characterized in that, described fuel charge device comprises and is installed in the charge pipe that is positioned on the kiln body of calcining zone top, be provided with reinforced auger in the charge pipe, be equipped with coal bunker on the furnace shell outer wall on charge pipe top, the bottom of coal bunker is provided with the feed opening that is communicated with charge pipe.
9. telescopic gas-burned vertical limekiln according to claim 1 is characterized in that, also is provided with the material distributing cone that cooperates with annular furnace top of chamber annular charging aperture at the top of described inner barrel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110155837XA CN102288022B (en) | 2011-06-10 | 2011-06-10 | Sleeve-type gas-burning shaft kiln |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110155837XA CN102288022B (en) | 2011-06-10 | 2011-06-10 | Sleeve-type gas-burning shaft kiln |
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| CN102288022B CN102288022B (en) | 2013-04-10 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103557688A (en) * | 2013-10-30 | 2014-02-05 | 中冶焦耐工程技术有限公司 | Hollow tube body for vertical kiln, material distributing device and use method |
| CN105403034A (en) * | 2015-11-30 | 2016-03-16 | 江苏立宇环境科技有限公司 | Continuous and vertical combustion furnace |
| CN107024117A (en) * | 2017-04-18 | 2017-08-08 | 王宇 | A kind of sintering furnace furnace shell |
| CN109160749A (en) * | 2018-11-09 | 2019-01-08 | 余松涛 | Circulation fine grained lime shaft kiln and its method for calcinating in a kind of |
| CN109579508A (en) * | 2018-11-28 | 2019-04-05 | 东北大学 | A kind of internal passage type energy-saving high yield type reheating magnesia shaft furnace |
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| CN109579508A (en) * | 2018-11-28 | 2019-04-05 | 东北大学 | A kind of internal passage type energy-saving high yield type reheating magnesia shaft furnace |
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| CN102288022B (en) | 2013-04-10 |
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