CN107014201A - Rotary kiln kiln body and production method with fractional combustion and kiln wall refrigerating function - Google Patents
Rotary kiln kiln body and production method with fractional combustion and kiln wall refrigerating function Download PDFInfo
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- CN107014201A CN107014201A CN201710256943.4A CN201710256943A CN107014201A CN 107014201 A CN107014201 A CN 107014201A CN 201710256943 A CN201710256943 A CN 201710256943A CN 107014201 A CN107014201 A CN 107014201A
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- kiln body
- kiln
- rotary kiln
- cylinder
- rotary
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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 body, is nested in the kiln body endothecium structure of rotary kiln body interior；Kiln body endothecium structure includes：The first cylindrical section, middle cylinder and the second cylindrical section being sequentially connected；Multiple stomatas are distributed with the cylinder of middle cylinder, the length of middle cylinder is consistent with the length of rotary kiln body Flame high-temperature region；The end of second cylindrical section is provided with connection member, and the end of the second cylindrical section and the kiln wall of the rotary kiln body are tightly connected by connection member；The termination of first cylindrical section is concordant with the kiln hood of rotary kiln body, and the external diameter of kiln body endothecium structure is less than the internal diameter of rotary kiln body, so as to form the circular air inlet passage of rotary kiln between kiln body endothecium structure and rotary kiln body.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 improving the production efficiency of rotary kiln.
Description
Technical field
The present invention relates to rotary kiln technology, particularly 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
All there is different degrees of ring formation in class rotary kiln, ring formation refers to height temperate zone inwall generation in rotary kiln in the process of running
Furnace charge ring-type adhesion.Slight adhesion is referred to as kliner coating, when adhesion reaches that certain thickness can influence stove normal operating
When, referred to as ring formation.
Once generation ring formation, will have a strong impact on production, make process system not normal, out of control, such as ring formation makes the thing in kiln
Expect fill factor increase, rotary kiln Main motor current increase, it sometimes appear that trip phenomenon brings hidden to the safe operation of kiln
Suffer from.Stop kiln processing ring formation problem in addition, production can be prevented from continuous, the Yield and quality of finished product is directly affected, 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 for 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, promote ring formation.2) fuel：During using coal as fuel, in colm contain compared with
Many ash contents, grey branch adheres to and deposited in kiln, and the SiO that ash content contains in coal2, Al2O3Deng acid ingredient at high temperature easily
The CaO produced with decomposition of limestone reacts to form low melting point, increases amount of liquid phase, causes ring formation.3) thermal regulation：Rotary kiln
Run in production process, it is desirable to which 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 too high or position is improper, can all cause Yao Nei materials localized hyperthermia, so that
Cause the material of some low melting points to produce Partial Liquid Phase, and then produce ring formation.If other air capacity is not enough while fineness of pulverized coal
It is higher, it can cause coal dust firing not exclusively, reducing atmosphere be formed in kiln, substantial amounts of CO makes the Fe in material2O3It is reduced into
FeO, FeO and other oxides formation eutectic, make liquid phase excessively formation, accelerate the formation speed of ring formation.
The processing both at home and abroad to ring formation mainly has following several approach, 1 at present) taken measures in kiln running, than
Kiln temperature method is such as fluctuated, by thermal shock damage ring formation in kiln running, makes ring formation material Automatic-falling, but this method meeting
Cause the kiln underproduction；2) stop to handle ring formation thing after kiln, specific method has artificial removal or removed using circle machine is scraped
Method etc., but all can not 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 consuming manpower and materials, while influenceing the normal operation of rotary kiln, reduces production efficiency, also having can
Product quality can be influenceed.Therefore ring formation Crack cause is found out, and then takes prophylactico-therapeutic measures, just can obtain ring formation of rotary kiln problem
Effectively control.
On the other hand, a large amount of nitrogen oxides (NO can be produced in rotary kiln production processx) pollution environment.With cement rotary kiln
Exemplified by, in the waste gas produced by it, 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, its mechanism of production has two kinds：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 suppress the mixing of fuel and air
The generation of nitrogen oxides is reduced etc. method.Thermal NOxIt is when ignition temperature is higher than 1500 DEG C in rotary kiln, in air
Nitrogen and oxygen reaction generation.Can be by reducing ignition temperature, the concentration of reduction nitrogen and oxygen and shortening stopping in rotary kiln
The time is stayed to reduce the generation of nitrogen oxides.Counted according to environmental administration, discharge contribution of the cement industry to nitrogen oxides is only second to
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.
The nitrogen oxides control technology in current cement plant mainly has three kinds：Low-NO_x combustion technology (LNB), selective catalysis are also
Former technology (SCR) and SNCR 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 cost is high and easily causes the harm of poisoning, and SNCR technologies take off
Sell efficiency and be 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, LNB technologies are more worth to be advocated, and simply the application of this technology is imitated at present
Fruit is influenceed larger by kiln operating mode etc. so that stable equipment operation is poor, it is necessary to which further perfect and raising, can just obtain wide
General application.
Reduce pollution therefore, how to provide a kind of can take into account and prevent the rotary kiln manufacturing technique method of ring formation turns into from working as
Before need solve the problem of.
The content of the invention
For defect of the prior art, the present invention provides a kind of rotary kiln with fractional combustion and kiln wall refrigerating function
Kiln body and production method, can realize the fractional combustion of material in rotary kiln production technology, while in material combustion process
The cooling to kiln wall is realized, kiln wall ring formation is effectively prevented.
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 body and the kiln body endothecium structure for being nested in rotary kiln body interior；
Kiln body endothecium structure is set close to the kiln hood of rotary kiln body, 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 with the cylinder of middle cylinder
The length of body Flame high-temperature region is consistent；
One end away from middle cylinder is provided with connection member in second cylindrical section, and the connection member justifies second segment
One end and the kiln wall of the rotary kiln body in cylinder away from middle cylinder are tightly connected；
One end away from middle cylinder is concordant with the kiln hood of the rotary kiln body in first cylindrical section, in the kiln body
The external diameter of Rotating fields is less than the internal diameter of rotary kiln body, so as to be formed between kiln body endothecium structure and rotary kiln body in rotary kiln
The circular air inlet passage of kiln hood one end open.
Alternatively, the length of first cylindrical section correspond to the rotary kiln body in kiln hood apart from flame high-temperature region
Length；
The length of second cylindrical section and the same length of the first cylindrical section.
Alternatively, connection member is that the infundibulate that one end away from middle cylinder is set in second cylindrical section connects
Connect device.
Alternatively, it is 120m in the rotary kiln body length of rotary kiln, when internal diameter is 4.8m, the kiln body endothecium structure
External diameter is 4.6m, and first paragraph drum length is 5-6m, and middle cylinder length is 19-21m, and second segment drum length is 3-6m.
Alternatively, the kiln body endothecium structure is the integrative-structure of cylinder type.
Alternatively, the kiln hood of the rotary kiln kiln body is additionally provided with enters for air intake in the cylinder to kiln body endothecium structure
Wind passage, and the interior fuel entrance for spraying into fuel of cylinder of oriented kiln body endothecium structure is set.
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 turned round by the tremie pipe feeding of kiln tail with default gradient and according to pre-set velocity
It is interior so that circumferencial direction rolling of the material along the kiln body in kiln body, and along kiln body axially from high-end to the compound fortune of low side
It is dynamic；
Step 2: injected fuel into by First air in the cylinder of kiln body endothecium structure, and by Part I Secondary Air
In the cylinder that kiln body endothecium structure is sent into by air intake passage so that fuel smoothly burns in cylinder；
Step 3: by circular air inlet passage feeding Part II Secondary Air, the kiln wall to cool down kiln body high-temperature region, together
When Part II Secondary Air entered by the stomata of kiln body endothecium structure in cylinder, burnt with the residual fuel in cylinder so that
Full combustion of fuel, and cause the raw material in kiln body to become clinker.
Alternatively, the gas pressure of circular air inlet passage feeding Part II Secondary Air is higher than the gas pressure in cylinder.
Alternatively, the hole diameter is less than material particular diameter.
Alternatively, the air quantity of Part I Secondary Air is less than the total blast volume required for fuel combustion.
The present invention has following beneficial effects：
Above-mentioned kiln body endothecium structure is applied in rotary kiln body, in rotary kiln technology, can be realized high in kiln body
Warm area maximum temperature is reduced, while so that fuel-staged combustion, the burned flame length length of side, it is to avoid 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 improving the production efficiency of rotary kiln, reaches and subtracts
The effect of of low pollution.
Brief description of the drawings
The schematic diagram for the kiln body endothecium structure that Fig. 1 one embodiment of the invention is provided；
The schematic diagram for the rotary kiln kiln body that Fig. 2 provides for one embodiment of the invention；
Fig. 3 is the schematic cross-section of rotary kiln kiln body in the embodiment of the present invention.
Reference：
10th, kiln body endothecium structure；11st, the first cylindrical section；12nd, middle cylinder；13rd, the second cylindrical section；14th, stomata；15th, even
Relay part；16th, rotary kiln body；17th, circular air inlet passage, 18, kiln tail (tail end of rotary kiln body 16)；19th, kiln hood (revolution
The head end of kiln body 16)；20th, rotary kiln kiln body；21st, material；22nd, the air that stomata enters into cylinder.
Embodiment
In order to preferably explain the present invention, in order to understand, below in conjunction with the accompanying drawings, by embodiment, to this hair
It is bright to be described in detail.
Embodiment one
With reference to shown in Fig. 1 and Fig. 2, the present embodiment provides a kind of rotary kiln kiln body 20, and the rotary kiln kiln body 20 has classification
Burning and kiln wall refrigerating function.The rotary kiln kiln body 20 of the present embodiment includes：Rotary kiln body 16, is nested in rotary kiln body 16
Internal kiln body endothecium structure 10；
Kiln body endothecium structure 10 is set close to kiln hood 19 head end of rotary kiln body 16 (kiln hood here be), itself and revolution
The shape of kiln body 16 is identical, is the cylindrical shape of both ends open, and the kiln body endothecium structure 10 includes：The first paragraph being sequentially connected
Cylinder 11, the cylindrical section 13 of middle cylinder 12 and second；
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 the Flame high-temperature region of rotary kiln body 16 is consistent；
One end (i.e. the end of kiln body endothecium structure 10) away from middle cylinder 12 is provided with second cylindrical section 13
Connection member 15, the connection member 15 is by one end and the rotary kiln body 16 away from middle cylinder 12 in the second cylindrical section 13
Kiln wall is tightly connected；
One end (i.e. the head end of kiln body endothecium structure 10) and this time in first cylindrical section 11 away from middle cylinder 12
Concordantly, the external 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 body 16) of rotary kiln body 16
The internal diameter of kiln body 16, so as to form the circular air inlet passage 17 of rotary kiln between kiln body endothecium structure and rotary kiln body.
As shown in figure 1, the kiln body endothecium structure 10 shown in Fig. 1 can be the integrative-structure of cylinder type, wherein, middle cylinder
The multiple stomatas being distributed with 12 cylinder in multiple stomatas 14, the present embodiment are staggered.In other embodiments, it is the plurality of
Stomata 14 can on the cylinder of middle cylinder 12 array distribution etc., the present embodiment is not defined to the arrangement of stomata, real
Now it is uniformly distributed.
In the present embodiment, the Secondary Air that circular air inlet passage enters enters the cylinder of kiln body endothecium structure 10 by stomata
It is interior, it may be such that the residual fuel in kiln body fully burns.That is, when handling raw material using rotary kiln, being entered by the annular
Wind passage sends into Secondary Air, and the Secondary Air now sent into is cryogenic gas, and the cryogenic gas can form cold in circular air inlet passage
But air film, is cooled down to high temperature kiln wall (the kiln wall of rotary kiln body)；In addition, the Secondary Air enters in cylinder through stomata,
To realize abundant burning to residual fuel, and then reach the purpose of fractional combustion.
Can be away from middle in second cylindrical section 13 in the connection member 15 during implementing shown in Fig. 1
The funnel coupling that one end of cylinder 12 is set, one end of funnel coupling and the termination of the second cylindrical section 13 are welded, separately
One end is welded with kiln wall, to realize sealed purpose, now ensures that the Secondary Air that circular air inlet passage enters can not be from second segment
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 connected by funnel coupling with kiln wall.That is, kiln body can form double-deck rolling
Barrel structure.
In actual applications, the length of the first above-mentioned cylindrical section 11 corresponds to kiln hood distance in the rotary kiln body 16
The length of flame high-temperature region；
The length of second cylindrical section and the same length of the first cylindrical section.
For example, the kiln body length in rotary kiln is 120m, when internal diameter is 4.8m, the external diameter of the kiln body endothecium structure is
4.6m, first paragraph drum length is 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, during 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 the row of 6-21m position distributions 11 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 the cylinder to kiln body endothecium structure
The air intake passage (not shown) of air intake, and set the interior fuel for spraying into fuel of the cylinder of oriented kiln body endothecium structure to spray into
Mouth (not shown).The air intake passage and fuel entrance of the present embodiment are same as the prior art in kiln body external position,
The present embodiment is sent directly into the wind of the air intake passage in the cylinder of kiln body endothecium structure, and injects fuel into the combustion of mouth
In material feeding cylinder.
In the present embodiment, kiln body endothecium structure is applied in rotary kiln body, in rotary kiln technology, kiln can be realized
Internal high-temperature region maximum temperature reduction, while so that fuel-staged combustion, the burned flame length length of side, it is to avoid local height
Temperature, can both reduce the generation of nitrogen oxides, and it is possible to prevente effectively from ring formation problem, while improving the production effect of rotary kiln
Rate, reaches the effect for reducing pollution.
Embodiment two
The embodiment of the present invention also provides a kind of rotary kiln production method using above-mentioned any described 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 body 16)
And in the kiln body turned round according to pre-set velocity so that circumferencial direction rolling of the material 21 along the kiln body in kiln body, and along
Kiln body is axially 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, injected fuel into the cylinder of kiln body endothecium structure by First air, and by Part I Secondary Air
In the cylinder that kiln body endothecium structure is sent into by air intake passage so that fuel smoothly burns in cylinder.
That is, fuel is sprayed into from the entrance of burner by cylinder by First air, and Part I Secondary Air passed through upper
The air intake passage stated enters cylinder so that cylinder fuel smoothly burns.
In the present embodiment, Part I Secondary Air enters in air intake wind passage, it is ensured that fuel combustion, and air intake passage enters
Secondary Air air quantity be less than fuel combustion required for total blast volume.Here the Secondary Air purpose that air intake passage enters is fuel energy
Enough smoothly burnings.
It will be appreciated that fuel is sprayed into by the burner of rotary kiln end, First air is herein as load coal gas with fuel
Spray into together.It is air without other implications for First air that Secondary Air, which is only,.
Step A03, by circular air inlet passage send into Part II Secondary Air, the kiln wall to cool down kiln body high-temperature region,
Part II Secondary Air enters the (air that i.e. stomata enters into cylinder in cylinder by the stomata of kiln body endothecium structure simultaneously
22), burnt with the residual fuel in cylinder so that full combustion of fuel, and cause the raw material in kiln body to become clinker.
That is, raw material in kiln body by decomposing, the technical process such as burn till, burn till after clinker and to be excluded from kiln hood.
In the present embodiment, Part II Secondary Air is entered in cylinder by the stomata of kiln body endothecium structure, makes fuel combustion
Area is increased, maximum temperature reduction, and the heat sent using fuel combustion is heated to raw material, so that it becomes clinker.Meanwhile, ring
Cryogenic gas formation cooling air film inside shape air intake passage, can be cooled down to high temperature kiln wall.
Especially, the gas pressure of circular air inlet passage feeding Part II Secondary Air is higher than the gas pressure in kiln body,
It can effectively ensure that the Part II Secondary Air that circular air inlet passage enters can be entered inside kiln body by stomata.
In the present embodiment, because the end of kiln body endothecium structure is fixedly connected with Yao Bi, therefore in production technology, kiln body
Endothecium structure and rotary kiln body can realize synchronous axial system.
For example, coal dust is sprayed into kiln body with First air by spray gun when rotary kiln is produced, and primary air flow accounts for total blast volume
25-30%.Secondary air separating is two parts, and Part I is entered in rotary kiln by the air intake passage of coal burner, and air quantity is accounted for
The 20-25% of total blast volume；Part II Secondary Air, air quantity accounts for the 45-55% of total blast volume, and above-mentioned circular air inlet is sent into by air pump
Passage, enters rotary kiln combustion-supporting to coal dust by the stomata of kiln body endothecium structure.
This part Secondary Air entered by the stomata of kiln body endothecium structure, realizes the fractional combustion of coal dust, Ke Yiyou
The generation of effect reduction nitrogen oxides, reaches the purpose for reducing pollution；
In addition, the low temperature Secondary Air that circular air inlet passage 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 passage is cooled down to high temperature kiln wall, slows down ring formation of rotary kiln
Formation.
Rotary kiln needed to clear up a ring formation thing every 50 days in the prior art, and rotary kiln uses above-mentioned kiln body internal layer knot
After structure, interval time is changed into 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 with reference to the foregoing embodiments, it will be understood by those within the art that：
It can still modify to the technical scheme described in previous embodiment, or which part or all technical characteristic are entered
Row equivalent substitution；And these modifications or substitutions, the essence of appropriate technical solution is departed from various embodiments of the present invention technical side
The scope of case.
Claims (10)
1. a kind of rotary kiln kiln body with fractional combustion and kiln wall refrigerating function, it is characterised in that including：Rotary kiln body and
It is nested in the kiln body endothecium structure of rotary kiln body interior；
Kiln body endothecium structure is set close to the kiln hood of rotary kiln body, and the kiln body endothecium structure includes：First be sequentially connected
Cylindrical section, middle cylinder and the second cylindrical section；
Wherein, it is distributed with the cylinder of middle cylinder in multiple stomatas, the length of the middle cylinder and the rotary kiln body
The length of flame high-temperature region is consistent；
One end away from middle cylinder is provided with connection member in second cylindrical section, and the connection member is by the second cylindrical section
One end and the kiln wall of the rotary kiln body away from middle cylinder are tightly connected；
One end away from middle cylinder is concordant with the kiln hood of the rotary kiln body in first cylindrical section, the kiln body internal layer knot
The external diameter of structure is less than the internal diameter of rotary kiln body, so as to be formed between kiln body endothecium structure and rotary kiln body in rotary kiln end
The circular air inlet passage of one end open.
2. rotary kiln kiln body according to claim 1, it is characterised 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 body；
The length of second cylindrical section and the same length of the first cylindrical section.
3. rotary kiln kiln body according to claim 1 or 2, it is characterised in that connection member is around second segment circle
The funnel coupling that one end away from middle cylinder is set in cylinder.
4. rotary kiln kiln body according to claim 3, it is characterised in that be in the rotary kiln body length of rotary kiln
120m, when internal diameter is 4.8m, the external diameter of the kiln body endothecium structure is 4.6m, and first paragraph 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, it is characterised in that the kiln body endothecium structure is the one of cylinder type
Structure.
6. rotary kiln kiln body according to claim 5, it is characterised in that the kiln hood of the rotary kiln kiln body is additionally provided with use
In the air intake passage of air intake in the cylinder to kiln body endothecium structure, and set the cylinder of oriented kiln body endothecium structure is interior to spray into combustion
The fuel entrance of material.
7. a kind of rotary kiln production method of any described rotary kiln kiln body of use the claims 1 to 6, its feature exists
In, including：
Step 1: in the kiln body turned round by raw material by the feeding of the tremie pipe of kiln tail with default gradient and according to pre-set velocity,
So that circumferencial direction rolling of the material in kiln body along the kiln body, and along kiln body axially from high-end to low side compound motion；
Step 2: being injected fuel into by First air in the cylinder of kiln body endothecium structure, and Part I Secondary Air is passed through
In the cylinder of air intake passage feeding kiln body endothecium structure so that fuel smoothly burns in cylinder；
Step 3: by circular air inlet passage feeding Part II Secondary Air, the kiln wall to cool down kiln body high-temperature region, while the
Two part Secondary Airs are entered in cylinder by the stomata of kiln body endothecium structure, are burnt with the residual fuel in cylinder so that fuel
Fully burning, and cause the raw material in kiln body to become clinker.
8. method according to claim 7, it is characterised in that circular air inlet passage sends into the gas of Part II Secondary Air
Pressure is higher than the gas pressure in cylinder.
9. method according to claim 7, it is characterised in that the hole diameter is less than material particular diameter.
10. method according to claim 7, it is characterised in that the air quantity of Part I Secondary Air is less than fuel combustion institute
The total blast volume needed.
Priority Applications (1)
| 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 |
Applications Claiming Priority (1)
| 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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| Publication Number | Publication Date |
|---|---|
| CN107014201A true CN107014201A (en) | 2017-08-04 |
| CN107014201B CN107014201B (en) | 2018-10-30 |
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ID=59448672
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| CN201710256943.4A Active 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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| Country | Link |
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Cited By (1)
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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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| 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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| CN107014201B (en) | 2018-10-30 |
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