CN107014201B - Rotary kiln kiln body with fractional combustion and kiln wall refrigerating function and production method - Google Patents
Rotary kiln kiln body with fractional combustion and kiln wall refrigerating function and production method Download PDFInfo
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- CN107014201B CN107014201B CN201710256943.4A CN201710256943A CN107014201B CN 107014201 B CN107014201 B CN 107014201B CN 201710256943 A CN201710256943 A CN 201710256943A CN 107014201 B CN107014201 B CN 107014201B
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- rotary kiln
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/02—Rotary-drum furnaces, i.e. horizontal or slightly inclined of multiple-chamber or multiple-drum type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L9/00—Passages or apertures for delivering secondary air for completing combustion of fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
- F27B7/36—Arrangements of air or gas supply devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
- F27B7/38—Arrangements of cooling devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/02—Rotary-drum furnaces, i.e. horizontal or slightly inclined of multiple-chamber or multiple-drum type
- F27B2007/027—Rotary-drum furnaces, i.e. horizontal or slightly inclined of multiple-chamber or multiple-drum type with more than one drum
Abstract
The present invention provides a kind of rotary kiln kiln body with fractional combustion and kiln wall refrigerating function, including：Rotary kiln ontology is nested in the kiln body endothecium structure of rotary kiln body interior；Kiln body endothecium structure includes：Sequentially connected first cylindrical section, middle cylinder and the second cylindrical section；Multiple stomatas are distributed on the cylinder of middle cylinder, the length of middle cylinder is consistent with the length of rotary kiln ontology Flame high-temperature region；The end of second cylindrical section is provided with connecting component, and the kiln wall of the end of the second cylindrical section and the rotary kiln ontology is tightly connected by connecting component；The end of first cylindrical section is concordant with the kiln hood of rotary kiln ontology, and the outer diameter of kiln body endothecium structure is less than the internal diameter of rotary kiln ontology, so as to form the circular air inlet channel of rotary kiln between kiln body endothecium structure and rotary kiln ontology.Above-mentioned kiln body can reduce the generation of nitrogen oxides in rotary kiln technology, and it is possible to prevente effectively from ring formation problem, while improve the production efficiency of rotary kiln.
Description
Technical field
The present invention relates to rotary kiln technology, especially a kind of rotary kiln kiln body with fractional combustion and kiln wall refrigerating function
And production method.
Background technology
Rotary kiln refers to rotary calcining kiln, can be divided into cement kiln, chemical metallurgy kiln and limekiln by processing material difference.Respectively
Class rotary kiln all has that different degrees of ring formation, ring formation refer to that height temperate zone inner wall occurs in rotary kiln in the process of running
Furnace charge ring-type adhesion.Slight adhesion is known as kliner coating, can influence stove normal operating when adherency reaches certain thickness
When, referred to as ring formation.
Once ring formation occurs, production will be seriously affected, keeps process system not normal, out of control, for example ring formation makes the object in kiln
Expect fill factor increase, rotary kiln Main motor current increase, it sometimes appear that trip phenomenon brought to the safe operation of kiln it is hidden
Suffer from.In addition stop kiln processing ring formation problem, production can be prevented from continuous, directly affect the yield and quality of finished product, increase energy consumption, and
And frequently igniting, the flame retardant coating of rotary kiln can be damaged, and then influence furnace service life.
The reason of causing ring formation of rotary kiln is complex, mainly there is three aspects：1) raw material：For cement rotary kiln, lime
The soil not screened out and sludge impurity (Al contained in stone raw material2O3, Fe2O3, SiO2, Na2O, K2O), can at high temperature with oxygen
Change calcium and generate a kind of adhesive compound of low melting point, promotes ring formation.2) fuel：When using coal as fuel, in colm containing compared with
More ash contents, grey branch adheres to and deposits in kiln, and the SiO that ash content contains in coal2, Al2O3Equal acid ingredients are at high temperature easily
The CaO generated with decomposition of limestone reacts to form low melting point, increases amount of liquid phase, causes ring formation.3) thermal regulation：Rotary kiln
It runs in production process, it is desirable that material stops time enough at high temperature, so needing the flame of certain high temperature, and requires
Flame has certain length, and the temperature of flame is excessively high or position is improper, can all cause Yao Nei materials localized hyperthermia, to
Cause the material of certain low melting points to generate Partial Liquid Phase, and then generates ring formation.In addition if the insufficient fineness of pulverized coal simultaneously of air capacity
It is higher, coal dust firing can be caused incomplete, form reducing atmosphere in kiln, a large amount of CO makes the Fe in material2O3It is reduced into
FeO, FeO form eutectic with other oxides, so that liquid phase is excessively formed, accelerate the formation speed of ring formation.
Approach is mainly the following to the processing of ring formation both at home and abroad at present, 1) it takes measures in kiln operational process, than
Kiln temperature method is such as fluctuated, by thermal shock damage ring formation in kiln operational process, makes ring formation substance Automatic-falling, but this method meeting
Cause the kiln underproduction；2) stop to handle ring formation object after kiln, specific method has artificial removal or removes using circle machine is scraped
Method etc., but all cannot inherently solve the problems, such as the ring formation of rotary kiln.Once ring formation problem occurs in rotary kiln, no matter use
Which kind of processing method is required for consumption manpower and materials, while influencing the normal operation of rotary kiln, reduces production efficiency, also may be used
It can influence product quality.Therefore ring formation Crack cause is found out, and then takes control measure, just ring formation of rotary kiln problem can be made to obtain
Effectively control.
On the other hand, a large amount of nitrogen oxides (NO are will produce in rotary kiln production processx) pollution environment.With cement rotary kiln
For, in generated exhaust gas, NO accountings are up to 90%, NO2Accounting is only 5%~10% or so.Primary product NO is in water
In the combustion process of stall, there are two types of mechanisms of production：Fuel type and heating power type.Fuel type NOxN members mainly in bunker coal
Element is generated through peroxidating.Can by change burning condition, use nitrogenous low fuel and inhibit fuel and air mixing
The methods of reduce the generation of nitrogen oxides.Thermal NOxIt is when ignition temperature is higher than 1500 DEG C in rotary kiln, in air
Nitrogen and oxygen reaction generate.It can be stopped in rotary kiln by reducing ignition temperature, reducing the concentration of nitrogen and oxygen and shorten
The time is stayed to reduce the generation of nitrogen oxides.It is counted according to environmental protection administration, cement industry is only second to the discharge contribution of nitrogen oxides
Thermal power generation and automotive emission, are number three, and annual nitrogen oxides yield accounts for the 10% of national total amount.And it is national
Environment management to be increased is pointed out in 13 planning, implements industrial pollution source overall up to standard bleed schedule.
At present there are mainly three types of the nitrogen oxides control technologies in cement plant：Low-NO_x combustion technology (LNB), selective catalysis are also
Former technology (SCR) and selective non-catalytic reduction technology (SNCR).Wherein SCR technology and SNCR technologies are all to use reducing agent
By the NO of generationxIt is reduced to N2And H2O, and LNB technologies are to reduce NO by change burning conditionxDischarge.Comparatively, LNB skills
Art device is simple, and small investment, operating cost is low, and SCR technology is of high cost and be easy to cause the harm of poisoning, and SNCR technologies are de-
It sells efficiency and is less than SCR technology, but safety and investment cost and operating cost are below SCR technology.Although current SNCR technologies
Comparison is more, but from the essence of energy-saving and emission-reduction, the more worth promotion of LNB technologies, only the application of this technology is imitated at present
Fruit is affected by kiln operating mode etc. so that equipment operation stability is poor, needs further to improve and improve, and can just obtain wide
General application.
It reduces pollution for this purpose, how to provide a kind of can take into account and prevents the rotary kiln manufacturing technique method of ring formation as working as
Preceding problem to be solved.
Invention content
For the defects in the prior art, the present invention provides a kind of rotary kiln with fractional combustion and kiln wall refrigerating function
The fractional combustion of material may be implemented in kiln body and production method in rotary kiln production technology, while in material combustion process
It realizes the cooling to kiln wall, effectively prevent kiln wall ring formation.
In a first aspect, the present invention provides a kind of kiln body endothecium structure with fractional combustion and kiln wall refrigerating function, including：
Rotary kiln ontology and the kiln body endothecium structure for being nested in rotary kiln body interior；
Kiln body endothecium structure is arranged close to the kiln hood of rotary kiln ontology, and the kiln body endothecium structure includes：It is sequentially connected
First cylindrical section, middle cylinder and the second cylindrical section；
Wherein, multiple stomatas, the length of the middle cylinder and the rotary kiln sheet are distributed on the cylinder of middle cylinder
The length of body Flame high-temperature region is consistent；
One end far from middle cylinder is provided with connecting component in second cylindrical section, which justifies second segment
One end and the kiln wall of the rotary kiln ontology in cylinder far from middle cylinder are tightly connected；
One end far from middle cylinder is concordant with the kiln hood of the rotary kiln ontology in first cylindrical section, in the kiln body
The outer diameter of layer structure is less than the internal diameter of rotary kiln ontology, so as to be formed in rotary kiln between kiln body endothecium structure and rotary kiln ontology
The circular air inlet channel of kiln hood one end open.
Optionally, the length of first cylindrical section correspond to the rotary kiln ontology in kiln hood apart from flame high-temperature region
Length；
The same length of the length and the first cylindrical section of second cylindrical section.
Optionally, connecting component is that the infundibulate that one end far from middle cylinder is arranged in second cylindrical section connects
Connect device.
Optionally, when the rotary kiln body length of rotary kiln is 120m, and internal diameter is 4.8m, the kiln body endothecium structure
Outer diameter is 4.6m, and first segment drum length is 5-6m, and middle cylinder length is 19-21m, and second segment drum length is 3-6m.
Optionally, the kiln body endothecium structure is the integral structure of cylinder type.
Optionally, the kiln hood of the rotary kiln kiln body be additionally provided with for entered the wind into the cylinder of kiln body endothecium structure into
Wind channel, and it is provided with the fuel entrance that fuel is sprayed into the cylinder of kiln body endothecium structure.
Second aspect, also a kind of rotary kiln production method using above-mentioned rotary kiln kiln body of the present invention, including：
Step 1: the kiln body that raw material are had default gradient and turned round according to pre-set velocity by the tremie pipe feeding of kiln tail
It is interior so that the material in kiln body rolls along the circumferencial direction of the kiln body, and axial from high-end to the compound fortune of low side along kiln body
It is dynamic；
Step 2: injected fuel by First air in the cylinder of kiln body endothecium structure, and by first part's Secondary Air
It is sent by air intake passage in the cylinder of kiln body endothecium structure so that fuel smoothly burns in cylinder；
Step 3: being sent into second part Secondary Air by circular air inlet channel, to the kiln wall of cooling kiln body high-temperature region, together
When second part Secondary Air entered in cylinder by the stomata of kiln body endothecium structure, in cylinder residual fuel burn so that
Full combustion of fuel, and the raw material in kiln body is made to become clinker.
Optionally, the gas pressure of second part Secondary Air is sent into higher than the gas pressure in cylinder in circular air inlet channel.
Optionally, the hole diameter is less than material particular diameter.
Optionally, the air quantity of first part's Secondary Air is less than the required total blast volume of fuel combustion.
The present invention has following advantageous effects：
Above-mentioned kiln body endothecium structure is applied in rotary kiln ontology, in rotary kiln technology, can be realized high in kiln body
Warm area maximum temperature reduces, while making fuel-staged combustion, and the burned flame length length of side avoids localized hyperthermia, both may be used
To reduce the generation of nitrogen oxides, and it is possible to prevente effectively from ring formation problem, while the production efficiency of rotary kiln is improved, reaches and subtract
The effect of of low pollution.
Description of the drawings
The schematic diagram for the kiln body endothecium structure that Fig. 1 one embodiment of the invention provides；
Fig. 2 is the schematic diagram for the rotary kiln kiln body that one embodiment of the invention provides；
Fig. 3 is the schematic cross-section of rotary kiln kiln body in the embodiment of the present invention.
Reference numeral：
10, kiln body endothecium structure；11, the first cylindrical section；12, middle cylinder；13, the second cylindrical section；14, stomata；15, even
Relay part；16, rotary kiln ontology；17, circular air inlet channel, 18, kiln tail (tail end of rotary kiln ontology 16)；19, kiln hood (revolution
The head end of kiln ontology 16)；20, rotary kiln kiln body；21, material；22, the air that stomata enters into cylinder.
Specific implementation mode
In order to preferably explain the present invention, in order to understand, below in conjunction with the accompanying drawings, by specific implementation mode, to this hair
It is bright to be described in detail.
Embodiment one
In conjunction with shown in Fig. 1 and Fig. 2, the present embodiment provides a kind of rotary kiln kiln body 20, which has classification
Burning and kiln wall refrigerating function.The rotary kiln kiln body 20 of the present embodiment includes：Rotary kiln ontology 16 is nested in rotary kiln ontology 16
Internal kiln body endothecium structure 10；
Kiln body endothecium structure 10 is close to kiln hood 19 (kiln hood here is the head end of rotary kiln ontology 16) setting, with revolution
The shape of kiln ontology 16 is identical, is the cylindrical shape of both ends open, and the kiln body endothecium structure 10 includes：Sequentially connected first segment
Cylinder 11, middle cylinder 12 and the second cylindrical section 13；
Wherein, be distributed with multiple stomatas 14 on the cylinder of middle cylinder 12, the length of the middle cylinder 12 with described time
The length of 16 Flame high-temperature region of rotary kiln ontology is consistent；
One end (i.e. the end of kiln body endothecium structure 10) far from middle cylinder 12 in second cylindrical section 13 is provided with
Connecting component 15, the connecting component 15 by far from middle cylinder 12 in the second cylindrical section 13 one end and the rotary kiln ontology 16
Kiln wall is tightly connected；
One end (i.e. the head end of kiln body endothecium structure 10) far from middle cylinder 12 in first cylindrical section 11 and this time
Concordantly, the outer diameter of the kiln body endothecium structure 10 is less than revolution to the kiln hood 19 (i.e. the head end of rotary kiln ontology 16) of rotary kiln ontology 16
The internal diameter of kiln ontology 16, so as to form the circular air inlet channel 17 of rotary kiln between kiln body endothecium structure and rotary kiln ontology.
As shown in Figure 1, kiln body endothecium structure 10 shown in Fig. 1 can be the integral structure of cylinder type, wherein middle cylinder
Multiple stomatas 14 are distributed on 12 cylinder, multiple stomatas in the present embodiment are staggered.In other embodiments, multiple
Stomata 14 array distribution etc., the present embodiment can not be defined the arrangement of stomata on the cylinder of middle cylinder 12, real
Now it is uniformly distributed.
In the present embodiment, the Secondary Air that circular air inlet channel enters enters the cylinder of kiln body endothecium structure 10 by stomata
It is interior, it may make the residual fuel in kiln body fully to burn.That is, using rotary kiln handle raw material when, by the annular into
Secondary Air is sent into wind channel, and the Secondary Air being sent at this time is cryogenic gas, which can form cold in circular air inlet channel
But air film cools down high temperature kiln wall (the kiln wall of rotary kiln ontology)；In addition, the Secondary Air enters across stomata in cylinder,
To realize fully burning to residual fuel, and then achieve the purpose that fractional combustion.
Connecting component 15 shown in FIG. 1 can be in second cylindrical section 13 far from intermediate during specific implementation
The funnel coupling of one end setting of cylinder 12, one end of funnel coupling and the end of the second cylindrical section 13 are welded, separately
One end is welded with kiln wall, to realize the purpose of sealing, ensures that the Secondary Air that circular air inlet channel enters can not be from second segment at this time
The end of cylinder 13 is diffused into cylinder, but enters cylinder by stomata, as shown in Figure 3.Kiln body endothecium structure 10 is with holes
Cylindrical structure, head end is fixed on kiln hood, and end is connect by funnel coupling with kiln wall.That is, kiln body can form the double-deck rolling
Barrel structure.
In practical applications, the length of the first above-mentioned cylindrical section 11 corresponds to kiln hood distance in the rotary kiln ontology 16
The length of flame high-temperature region；
The same length of the length and the first cylindrical section of second cylindrical section.
For example, the kiln body length of rotary kiln is 120m, when internal diameter is 4.8m, the outer diameter of the kiln body endothecium structure is
4.6m, first segment drum length are 5-6m, and middle cylinder length is 19-21m, and second segment drum length is 3-6m.
In a particular application, the kiln body length of rotary kiln is 120m, when a diameter of 4.8m, is at kiln hood 5m in production technology
Spray gun nozzle exit area, hereafter 20m is flame high-temperature region；Therefore the diameter of above-mentioned kiln body endothecium structure 10 can be 4.6 meters, length can be
26m, the stomata 14 that 11 row of 6-21m position distributions is interspersed in the longitudinal direction.
On the other hand, the kiln hood of the rotary kiln kiln body of the present embodiment is additionally provided with for into the cylinder of kiln body endothecium structure
The air intake passage (not shown) of air inlet, and it is provided with the fuel penetrating that fuel is sprayed into the cylinder of kiln body endothecium structure
Mouth (not shown).The air intake passage and fuel entrance of the present embodiment are the same as those in the prior art in kiln body external position,
The present embodiment is only the combustion for being sent directly into the wind of the air intake passage in the cylinder of kiln body endothecium structure, and injecting fuel into mouth
Material is sent into cylinder.
In the present embodiment, kiln body endothecium structure is applied in rotary kiln ontology, in rotary kiln technology, can realize kiln
Internal high-temperature region maximum temperature reduces, while making fuel-staged combustion, and the burned flame length length of side avoids local height
Temperature, can not only reduce the generation of nitrogen oxides, but also it is possible to prevente effectively from ring formation problem, while improve the production effect of rotary kiln
Rate achievees the effect that reduce pollution.
Embodiment two
The embodiment of the present invention also provides a kind of rotary kiln production method using the above-mentioned arbitrary rotary kiln kiln body, should
Method may include：
Step A01, raw material had into default gradient from the feeding of the tremie pipe of kiln tail 18 (i.e. the end of rotary kiln ontology 16)
And according in the kiln body of pre-set velocity revolution so that the material 21 in kiln body rolls along the circumferencial direction of the kiln body, and along
Kiln body is axial from high-end to low side compound motion.
In the present embodiment, the kiln hood of kiln body is in inclined low side.
Step A02, it is injected fuel by First air in the cylinder of kiln body endothecium structure, and by first part's Secondary Air
It is sent by air intake passage in the cylinder of kiln body endothecium structure so that fuel smoothly burns in cylinder.
That is, fuel is sprayed into cylinder from the entrance of burner by First air, and first part's Secondary Air passed through upper
The air intake passage stated enters cylinder so that cylinder fuel smoothly burns.
In the present embodiment, first part's Secondary Air enters in air inlet wind channel, ensures that fuel combustion, air intake passage enter
Secondary Air air quantity be less than the required total blast volume of fuel combustion.Here the purpose of Secondary Air that air intake passage enters is fuel energy
Enough smoothly burnings.
It will be appreciated that fuel is sprayed by the burner of rotary kiln end, First air is herein as load coal gas with fuel
It sprays into together.Secondary Air is only for First air, is air without other meanings.
Step A03, second part Secondary Air is sent by circular air inlet channel, to cool down the kiln wall of kiln body high-temperature region,
Second part Secondary Air enters in cylinder (the air that i.e. stomata enters into cylinder by the stomata of kiln body endothecium structure simultaneously
22) it, burns with the residual fuel in cylinder so that full combustion of fuel, and the raw material in kiln body is made to become clinker.
That is, raw material are discharged after being burnt into clinker from kiln hood in kiln body by decomposition, the technical process such as firing.
In the present embodiment, second part Secondary Air is entered by the stomata of kiln body endothecium structure in cylinder, and fuel combustion is made
Area increases, and maximum temperature reduces, and is heated to raw material using the heat that fuel combustion is sent out, so that it becomes clinker.Meanwhile ring
Cryogenic gas inside shape air intake passage forms cooling air film, can be cooled down to high temperature kiln wall.
Particularly, the gas pressure of circular air inlet channel feeding second part Secondary Air is higher than the gas pressure in kiln body,
It can effectively ensure that the second part Secondary Air that circular air inlet channel enters can be entered by stomata inside kiln body.
In the present embodiment, since the end of kiln body endothecium structure is fixedly connected with Yao Bi, therefore in production technology, kiln body
Endothecium structure and rotary kiln ontology can realize synchronous rotation.
For example, coal dust is sprayed by spray gun in kiln body with First air when rotary kiln produces, and primary air flow accounts for total blast volume
25-30%.Secondary air separating is two parts, and first part is entered by the air intake passage of coal burner in rotary kiln, and air quantity accounts for about
The 20-25% of total blast volume；Second part Secondary Air, air quantity account for the 45-55% of total blast volume, and above-mentioned circular air inlet is sent by air pump
It is combustion-supporting to coal dust to enter rotary kiln by the stomata of kiln body endothecium structure for channel.
This part Secondary Air entered by the stomata of kiln body endothecium structure, realizes the fractional combustion of coal dust, Ke Yiyou
Effect reduces the generation of nitrogen oxides, achievees the purpose that reduce pollution；
In addition, the low temperature Secondary Air that circular air inlet channel enters can prevent the appearance of localized hyperthermia, it can effectively slow down knot
Circle problem, that is to say, that the Cryogenic air in the entrance of circular air inlet channel cools down high temperature kiln wall, slows down ring formation of rotary kiln
Formation.
Rotary kiln needed to clear up a ring formation object every 50 days in the prior art, and rotary kiln uses above-mentioned kiln body internal layer knot
After structure, interval time becomes 120 days, effectively improves the production efficiency of rotary kiln.
Finally it should be noted that：Above-described embodiments are merely to illustrate the technical scheme, rather than to it
Limitation；Although the present invention is described in detail referring to the foregoing embodiments, it will be understood by those of ordinary skill in the art that：
It can still modify to the technical solution recorded in previous embodiment, or to which part or all technical features into
Row equivalent replacement；And these modifications or substitutions, it does not separate the essence of the corresponding technical solution various embodiments of the present invention technical side
The range of case.
Claims (10)
1. a kind of rotary kiln kiln body with fractional combustion and kiln wall refrigerating function, which is characterized in that including：Rotary kiln ontology and
It is nested in the kiln body endothecium structure of rotary kiln body interior；
Kiln body endothecium structure is arranged close to the kiln hood of rotary kiln ontology, and the kiln body endothecium structure includes：Sequentially connected first
Cylindrical section, middle cylinder and the second cylindrical section；
Wherein, be distributed with multiple stomatas on the cylinder of middle cylinder, the length of the middle cylinder in the rotary kiln ontology
The length of flame high-temperature region is consistent；
One end far from middle cylinder is provided with connecting component in second cylindrical section, which will be in the second cylindrical section
One end and the kiln wall of the rotary kiln ontology far from middle cylinder are tightly connected；
One end far from middle cylinder is concordant with the kiln hood of the rotary kiln ontology in first cylindrical section, the kiln body internal layer knot
The outer diameter of structure is less than the internal diameter of rotary kiln ontology, so as to be formed in rotary kiln end between kiln body endothecium structure and rotary kiln ontology
The circular air inlet channel of one end open.
2. rotary kiln kiln body according to claim 1, which is characterized in that the length of first cylindrical section corresponds to described
Length of the kiln hood apart from flame high-temperature region in rotary kiln ontology；
The same length of the length and the first cylindrical section of second cylindrical section.
3. rotary kiln kiln body according to claim 1 or 2, which is characterized in that connecting component is to justify around the second segment
The funnel coupling that one end far from middle cylinder is arranged in cylinder.
4. rotary kiln kiln body according to claim 3, which is characterized in that be in the rotary kiln body length of rotary kiln
120m, when internal diameter is 4.8m, the outer diameter of the kiln body endothecium structure is 4.6m, and first segment drum length is 5-6m, middle cylinder
Length is 19-21m, and second segment drum length is 3-6m.
5. rotary kiln kiln body according to claim 3, which is characterized in that the kiln body endothecium structure is the one of cylinder type
Structure.
6. rotary kiln kiln body according to claim 5, which is characterized in that the kiln hood of the rotary kiln kiln body is additionally provided with use
In the air intake passage entered the wind into the cylinder of kiln body endothecium structure, and it is provided with into the cylinder of kiln body endothecium structure and sprays into combustion
The fuel entrance of material.
7. a kind of rotary kiln production method using any rotary kiln kiln body of the claims 1 to 6, feature exists
In, including：
Step 1: raw material by the feeding of the tremie pipe of kiln tail are had default gradient and according in the kiln body of pre-set velocity revolution,
So that the material in kiln body rolls along the circumferencial direction of the kiln body, but it is axial from high-end to low side compound motion along kiln body；
Step 2: being injected fuel by First air in the cylinder of kiln body endothecium structure, and first part's Secondary Air is passed through
Air intake passage is sent into the cylinder of kiln body endothecium structure so that fuel smoothly burns in cylinder；
Step 3: be sent into second part Secondary Air by circular air inlet channel, to the kiln wall of cooling kiln body high-temperature region, while the
Two part Secondary Airs are entered by the stomata of kiln body endothecium structure in cylinder, are burnt with the residual fuel in cylinder so that fuel
Fully burning, and the raw material in kiln body is made to become clinker.
8. the method according to the description of claim 7 is characterized in that the gas of second part Secondary Air is sent into circular air inlet channel
Pressure is higher than the gas pressure in cylinder.
9. the method according to the description of claim 7 is characterized in that the hole diameter is less than material particular diameter.
10. the method according to the description of claim 7 is characterized in that the air quantity of first part's Secondary Air is less than fuel combustion institute
The total blast volume needed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710256943.4A CN107014201B (en) | 2017-04-19 | 2017-04-19 | Rotary kiln kiln body with fractional combustion and kiln wall refrigerating function and production method |
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| CN201710256943.4A CN107014201B (en) | 2017-04-19 | 2017-04-19 | Rotary kiln kiln body with fractional combustion and kiln wall refrigerating function and production method |
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| CN107014201B true CN107014201B (en) | 2018-10-30 |
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| CN114370760A (en) * | 2022-01-13 | 2022-04-19 | 江西云锂材料股份有限公司 | Spodumene transformation type oxygen-enriched roasting method |
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| US6221127B1 (en) * | 1999-11-10 | 2001-04-24 | Svedala Industries, Inc. | Method of pyroprocessing mineral ore material for reducing combustion NOx |
| CN100449239C (en) * | 2000-09-11 | 2009-01-07 | 凯登丝环境能源有限公司 | Mixing high temp. gas i nmineral kilns |
| CN101608864A (en) * | 2008-06-17 | 2009-12-23 | 沈阳铝镁设计研究院 | A kind of carbon-calcining rotary kiln lining and second tuyere structure thereof |
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