CN102230726B - Sleeve type continuous calcining vertical kiln - Google Patents
Sleeve type continuous calcining vertical kiln Download PDFInfo
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- CN102230726B CN102230726B CN 201110155831 CN201110155831A CN102230726B CN 102230726 B CN102230726 B CN 102230726B CN 201110155831 CN201110155831 CN 201110155831 CN 201110155831 A CN201110155831 A CN 201110155831A CN 102230726 B CN102230726 B CN 102230726B
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- 238000001354 calcination Methods 0.000 title claims abstract description 67
- 230000002093 peripheral effect Effects 0.000 claims abstract description 33
- 238000001816 cooling Methods 0.000 claims abstract description 16
- 239000000446 fuel Substances 0.000 claims abstract description 16
- 239000011449 brick Substances 0.000 claims description 19
- 239000000463 material Substances 0.000 claims description 17
- 238000007599 discharging Methods 0.000 claims description 8
- 239000003245 coal Substances 0.000 claims description 7
- 238000005192 partition Methods 0.000 claims description 7
- 230000007246 mechanism Effects 0.000 claims description 4
- 210000003050 axon Anatomy 0.000 claims description 3
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- 238000007514 turning Methods 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims description 2
- 239000002994 raw material Substances 0.000 abstract description 28
- 239000004575 stone Substances 0.000 abstract description 24
- 230000000694 effects Effects 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 238000009423 ventilation Methods 0.000 abstract 2
- 238000002955 isolation Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 13
- 239000004571 lime Substances 0.000 description 9
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 8
- 235000011941 Tilia x europaea Nutrition 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 239000007789 gas Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 239000002817 coal dust Substances 0.000 description 5
- 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
- 238000002156 mixing Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000000567 combustion gas Substances 0.000 description 2
- 238000010924 continuous production Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
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- 230000001360 synchronised effect Effects 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 206010019332 Heat exhaustion Diseases 0.000 description 1
- 235000019738 Limestone Nutrition 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
- 230000008901 benefit Effects 0.000 description 1
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- 239000004927 clay Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003837 high-temperature calcination Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 239000006028 limestone Substances 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
- 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
- 230000032696 parturition Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
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- 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
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- 239000002918 waste heat Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Muffle Furnaces And Rotary Kilns (AREA)
- Furnace Details (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
Abstract
The invention discloses a sleeve type continuous calcining vertical kiln. An annular kiln cavity is formed by the encircling of an inner barrel and an outer barrel which are sleeved together in a kiln body; the annular kiln cavity is provided with a preheating area, a calcining area and a cooling area in sequence from top to bottom; the barrel wall of the inner barrel is provided with a plurality of ventilation holes for communicating the annular kiln cavity with the inner cavity of the inner barrel; the periphery of the outer barrel is covered with a barrel-shaped kiln shell; a peripheral air channel is arranged between the inner wall face of the barrel-shaped kiln shell and the outer wall face of the outer barrel in an encircling manner; ventilation holes for communicating the annular kiln cavity with the peripheral air channel are distributed on the barrel wall of the outer barrel; radial isolation structures are distributed at intervals in the inner cavity of the inner barrel and the periphery air channel in a staggered way along the axial direction of the kiln body; and a fuel feeding device communicated with the calcining area in the annular kiln cavity is arranged on the upper part of the kiln shell. The vertical kiln has a simple structure and a good energy-saving effect; and calcination of powdery or particulate small-diameter stone raw materials is realized, waste of raw materials is avoided, meanwhile, the operation of the kiln is simplified, and the fuel consumption is lowered.
Description
Technical field
The invention belongs to the high-temperature calcination production technical field of the materials such as lime, magnesium metal, definite saying relates to a kind of vertical type calcining kiln.
Background technology
Along with the development of metallurgical industry, the improving constantly of calcining technology and technique is so that China has 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 large, and the lime impurity content of its production is large, 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 larger, and floor space is larger, and it is higher to consume energy.Shaft kiln claims again shaft furnace, 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 again traditional shaft kiln and sleeve kiln, the tradition shaft kiln is because the calcining zone volume is larger, thereby to the requirement for restriction of the granularity of raw material higher (being limited in 70～150 mm scopes), being above standard to affect the interior gas permeability of kiln, cause the inside and outside temperature of calcining zone unbalanced, burning occurs or give birth to the burning phenomenon, so that its unstable product quality.
Existing sleeve kiln mainly 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 steel welding, 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 upper inner core, and the bottom is lower 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 large, 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, so that use the business capital of this sleeve kiln to drop into larger, and, this sleeve kiln need to use many Fans respectively its inner core to be cooled off, for burning provides the spraying cycle air and extracts waste gas in the kiln out, so that the flow of this sleeve kiln furnace gas and pressure are larger, its operation requirements to the requirement of material and workman is higher, heat exhaustion is higher, cause its production cost relatively high, to the obstacles of applying of sleeve kiln.
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 discharging device, 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 tubular structure with the furnace chamber in the kiln body, radially offer some inlet and outlets on the conduit wall of hot blast air-out passage, and be equipped with the radially bocca of flame at the kiln body sidewall that is positioned at calcining zone.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 larger block stone material of machining shape volume, and for powdery or the graininess stone material of small volume, then can't calcine, otherwise the powdery stone material can enter the hot blast air-out passage by the inlet and outlet from the hot blast air-out passage owing to the impact of the combustion-gas flow that sprays in the bocca, cause the waste of large content of starting materials, and, in the lime burning process, if the excessive whereabouts of causing easily vapour lock to stop raw material 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, affect product quality.
Summary of the invention
The objective of the invention is: a kind of sleeve type continuous calcining vertical shaft furnace that can be used for calcining the stone raw material of different sizes or shape is provided.
The technical scheme of sleeve type continuous calcining vertical shaft furnace of the present invention is: a kind of sleeve type continuous calcining vertical shaft furnace, comprise the kiln body, be arranged with annular furnace chamber by suit inner barrel and outer cylinder body together in the kiln body, this annular furnace chamber is provided with the preheating zone from top to bottom successively, calcining zone and cooling zone, offer the passage of the annular furnace chamber of some connections and inner barrel inner chamber on the barrel of inner barrel, 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 the alternate radially partition-type structures that has been laid staggeredly, on the top of described kiln shell the fuel charge device that is communicated with calcining zone in the annular furnace chamber is installed.
Bottom at described furnace shell also offers air inlet, and described radially partition-type structures mainly is located at the peripheral airway bottom by middle part, the described cooling zone of correspondence radial loop, and radially the second partition in being located at the inner barrel inner chamber, corresponding described calcining zone middle part radial loop are located at the 3rd dividing plate in the peripheral airway, corresponding described preheating zone and calcining zone junction the 5th dividing plate that radially radial loop is located in the peripheral airway in the middle part of the 4th dividing plate in being located at the inner barrel inner chamber and the corresponding described preheating zone and are formed near first dividing plate at air inlet place, corresponding described cooling zone and calcining zone junction.
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 at air collecting chamber.
The barrel of described inside and outside cylindrical shell mainly by the refractory brick with through hole successively bond consist of, the through hole on each refractory brick is tilted to respectively upper 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 is arranged on the internal face of annular furnace chamber respectively that the radial convex along the kiln body is provided with fin, and the fin on each refractory brick of same layer surrounds annular, thereby forms the choking coil that axially spaced-apart ring is from top to bottom established in annular furnace chamber.
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, and the furnace shell outer wall on charge pipe top is equipped with coal bunker, and the bottom of coal bunker is provided with the feed opening that is communicated with charge pipe.
Shaft furnace of the present invention is simple in structure, its by furnace shell and in, outer cylinder body forms three layers of tube-in-tube structure, adopt the autonomous burning of fuel and negative pressure inlet mode, cancelled jet-burning device, reduced the wind speed of air-flow in the kiln body calcining zone, guaranteed the even whereabouts of stone raw material and fuel, thereby realized the calcining of powdery or granular minor diameter stone raw material, avoided the waste of raw material, simultaneously, it adds raw material and fuel by the even fuel charge device of laying of annular furnace chamber charge door and kiln shell top is continual in annular furnace chamber, utilize deadweight to realize the discharging of product, it has simplified the operation of kiln on the one hand, reduce the construction cost of kiln, on the other hand can by control fuel feeding quantity to prevent occurring burning in the calcination process, control is convenient, simple to operate, 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 gas in the kiln body, pass the rising of turning back of annular furnace chamber, 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 the burning phenomenon from appearring giving birth in stone raw material, the heat that can utilize fully on the other hand calcining to produce is realized raw material and preheating of air synchronously, heat utilization efficiency is high, thereby has reduced the consumption of fuel, has good energy-saving effect.
Description of drawings
Fig. 1 is the structural representation of sleeve type continuous calcining vertical shaft furnace specific embodiment of the present invention.
The specific embodiment
The specific embodiment of sleeve type continuous calcining vertical shaft furnace of the present invention as shown in Figure 1, the direction of arrow is airflow direction among the figure.The kiln body of this shaft furnace mainly is located at the outer cylinder body 2 and the inner barrel 3 that are made of refractory material in the furnace shell 1 with coaxial sleeve and forms 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 consist of, 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 respectively some for the hollow pipelines 6 of connection inner barrel and the passage of annular furnace chamber 5 and annular furnace chamber 5 and peripheral airway 4, 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 by the inner orifice that is arranged in annular furnace chamber 5 and upward extends to being arranged in peripheral airway 4 or inner barrel hollow pipeline 6 corresponding outer apertures respectively, with the through hole inflow peripheral airway 4 or hollow pipeline 6 of powder raw material from refractory brick that prevents from being fallen by annular furnace chamber 5 top fed mouths.Simultaneously being arranged on the internal face of annular furnace chamber 5 respectively at each refractory brick, the radial convex along the kiln body is provided with fin, fin on each refractory brick of same layer surrounds annular, thereby at the annular furnace chamber 5 interior formation choking coil established of axially spaced-apart ring from top to bottom, so that in the process that stone raw material falls by deadweight in annular furnace chamber 5, the falling speed that the ectonexine of stone raw material slows down after stopped by choking coil, and the stone raw material speed at center is constant, thereby stone raw material is produced mixing effect, it is more balanced that stone raw material is heated in annular furnace chamber, improves the quality of production of stone material.
In the annular furnace chamber 5 from top to bottom successively be provided with the 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, on the external wall of upper portion of furnace shell 1, also be equipped with the coal bunker 21 for the storage coal dust, bottom at coal bunker 21 is laid with some charge pipes 13 around even circumferential, each charge pipe 13 passes respectively furnace shell 1 and outer cylinder body 2 is communicated with annular furnace chamber 5, be separately installed with reinforced auger (not looking out among the figure) in each charge pipe 13, the bottom of coal bunker 21 is around being evenly distributed in the feed opening corresponding with each charge pipe 13.For guaranteeing that the kiln body can utilize the fresh cold air that is entered by air inlet 12 fully in calcining stone material 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.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 the some heat exchanger tubes 22 to downward-extension along the kiln axon, be connected with on the air collecting chamber 17 and pass inside and outside cylindrical shell 2,3 and the air inlet pipe 16 that is communicated with ambient atmosphere of furnace shell 1, the bottom plug-in mounting of each heat exchanger tube 22 is fixed on the 4th dividing plate 11.On the top of inner barrel 3 material distributing cone 19 that cooperates with annular furnace chamber 5 top fed mouths is installed also, makes the annular furnace chamber 5 that enters into that stone raw material can be balanced, guarantee that the raw material height everywhere of annular furnace chamber 5 equates.
This shaft furnace is in calcination process, difform stone raw material enters through the charging aperture of material distributing cone 19 from annular furnace chamber 5 tops by the top of feed mechanism from the kiln body, raw material is at first calcined the hot gas preheating of generation through the preheating zone on annular furnace chamber 5 tops, raw material after the preheating is lower in calcining zone gradually, simultaneously, start reinforced auger, coal dust is joined in the annular furnace chamber 5 uniformly the calcining that realizes after mixing with stone raw material stone raw material, product after the calcining falls gradually, transfers out after the discharging opening of annular furnace chamber 5 bottoms is collected by funnel shaped drawing mechanism 15.In the production process, the heat that calcining produces rises and forms negative pressure, fresh cold air is drawn in the kiln body carries out combustion-supporting to fuel, wherein portion of air is inhaled into from the air inlet of furnace shell 1 bottom, and another part air is inhaled into through air collecting chamber 19 and heat exchanger tube 22 by the air inlet pipe 16 on kiln body top.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, cooperated by the first dividing plate 9 in the peripheral airway 4 and the second partition in the hollow pipeline 6 10, make fresh air first by inside and outside cylindrical shell 2, inlet and outlet 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, inlet and outlet on 3 barrels passes annular furnace chamber 5 and enters into peripheral airway 4 between the first dividing plate 9 and the 3rd dividing plate 8, the high-temperature material that fresh air passes for twice 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, make after the calcining that residual waste heat is reused again on material, thereby improved the heat utilization ratio of this shaft furnace.The air that enters after the preheating in the peripheral airway 4 upwards enters into calcining zone, cooperation by the 3rd dividing plate 8 and the 4th dividing plate 11, make air after the preheating for the third time by inside and outside cylindrical shell 2, inlet and outlet on 3 passes annular furnace chamber 5 and enters into hollow pipeline 6 between second partition 10 and the 4th dividing plate 11, and again pass annular furnace chamber 5 and enter into peripheral airway 4, simultaneously, the fresh air that is entered by kiln body top air inlet pipe 16 also is transported in the hollow pipeline 6 between second partition 10 and the 4th dividing plate 11 by air collecting chamber 19 and heat exchanger tube 22, the mixing of in calcining zone, meeting of the air of two strands of different directions, for the coal dust firing in the annular furnace chamber 5 provides combustion-supporting fully, make the coal dust everywhere in the annular furnace chamber 5 all can be able to abundant burning, thereby can avoid occuring in the annular furnace chamber 5 to give birth to burns phenomenon, simultaneously, can utilize reinforced auger in the charge pipe 13 to realize joining the control of the coal dust amount in the annular furnace chamber 5, thereby preventing that stone raw material in the annular furnace chamber 5 from occuring to give birth to burn, burn-off phenomenon.Waste gas after the burning rises in peripheral airway 4 and enters in the preheating zone, after being stopped by the 5th dividing plate 7, it passes again annular furnace chamber 5, thereby the stone raw material that newly joins in the annular furnace chamber 5 is carried out preheating, improve the burning quality of stone raw material, the hollow pipeline 6 that remaining tail gas enters into the 4th dividing plate 11 tops after the preheating carries out preheating by 22 pairs of fresh airs through heat exchanger tube 22 of heat exchanger tube, and last tail gas emits through smoke exhaust pipe 18.
Sleeve type continuous calcining vertical shaft furnace of the present invention simple in structure only needs once igniting 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 the calcining to the stone material of different size and shapes, and the scope of application is wide, adaptable; And the heat that can take full advantage of in process of production the calcining generation 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, continuous production is strong, production efficiency is high, the production cost of product is low, and alternative existing calcining kiln is promoted the use of in the calcining production fields such as lime, magnesium metal.
The present invention is not limited to above-described embodiment, those skilled in the art be easy to expect other air intake mode according to the description of above-described embodiment 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 the first dividing plate that is arranged in the peripheral airway; It can also set up other dividing plate on the basis of above-described embodiment, increases 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 (8)
1. sleeve type continuous calcining vertical shaft furnace, comprise the kiln body, the bottom of kiln body is provided with air inlet, the top of kiln body is provided with exhaust opening, be arranged with annular furnace chamber by suit inner barrel and outer cylinder body together in the kiln body, the top of annular furnace chamber, the bottom is arranged with charging aperture and discharging opening, this annular furnace chamber is provided with the preheating zone from top to bottom successively, calcining zone and cooling zone, offer the passage of the annular furnace chamber of some connections and inner barrel inner chamber on the barrel of inner barrel, 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 the rising of turning back of inner barrel inner chamber and peripheral airway, thereby pass through successively the cooling zone of annular furnace chamber, the radially partition-type structures of calcining zone and preheating zone, the kiln shell above described calcining zone are equipped with the dusty fuel feeding device that is communicated with calcining zone in the annular furnace chamber.
2. sleeve type continuous calcining vertical shaft furnace according to claim 1, it is characterized in that, bottom at described furnace shell also offers air inlet, described radially partition-type structures mainly is located at first dividing plate at close air inlet place in the peripheral airway 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. sleeve type continuous calcining vertical shaft furnace according to claim 2, 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 at air collecting chamber.
4. sleeve type continuous calcining vertical shaft furnace 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, furnace shell outer wall on charge pipe top is equipped with coal bunker, and the bottom of coal bunker is provided with the feed opening that is communicated with charge pipe.
5. sleeve type continuous calcining vertical shaft furnace according to claim 1, it is characterized in that, the barrel of described inside and outside cylindrical shell mainly by the refractory brick with described passage successively bond consist of, each passage on the described outer cylinder body on each refractory brick tilts to extend upward in the aperture outside the correspondence that is arranged in peripheral airway by the respective interior bores mouth that is arranged in annular furnace chamber, and each passage on the described inner barrel on each refractory brick tilts to extend upward in the aperture outside the correspondence that is arranged in the inner barrel inner chamber by the respective interior bores mouth that is arranged in annular furnace chamber.
6. sleeve type continuous calcining vertical shaft furnace 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 the radial convex along the kiln body is provided with fin, fin on each refractory brick of same layer surrounds annular, thereby forms the choking coil that axially spaced-apart ring is from top to bottom established in annular furnace chamber.
7. sleeve type continuous calcining vertical shaft furnace 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. sleeve type continuous calcining vertical shaft furnace 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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| CN 201110155831 CN102230726B (en) | 2011-06-10 | 2011-06-10 | Sleeve type continuous calcining vertical kiln |
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| CN 201110155831 CN102230726B (en) | 2011-06-10 | 2011-06-10 | Sleeve type continuous calcining vertical kiln |
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| CN102230726A CN102230726A (en) | 2011-11-02 |
| CN102230726B true CN102230726B (en) | 2013-04-10 |
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| WO2016136485A1 (en) * | 2015-02-25 | 2016-09-01 | 吉野石膏株式会社 | Apparatus and method for calcination of gypsum |
| 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 |
| CN108358474B (en) * | 2018-05-23 | 2023-07-18 | 四川马氏窑技术发展有限公司 | Continuous air supply coal-saving mixing lime kiln |
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| CN102230726A (en) | 2011-11-02 |
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