CN101608866B - Predecomposition kiln tail system outside of cement kiln, which can treat raw materials with combustibles - Google Patents
Predecomposition kiln tail system outside of cement kiln, which can treat raw materials with combustibles Download PDFInfo
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- CN101608866B CN101608866B CN200910304794XA CN200910304794A CN101608866B CN 101608866 B CN101608866 B CN 101608866B CN 200910304794X A CN200910304794X A CN 200910304794XA CN 200910304794 A CN200910304794 A CN 200910304794A CN 101608866 B CN101608866 B CN 101608866B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/43—Heat treatment, e.g. precalcining, burning, melting; Cooling
- C04B7/434—Preheating with addition of fuel, e.g. calcining
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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
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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
- F27B7/2016—Arrangements of preheating devices for the charge
- F27B7/2025—Arrangements of preheating devices for the charge consisting of a single string of cyclones
- F27B7/2033—Arrangements of preheating devices for the charge consisting of a single string of cyclones with means for precalcining the raw material
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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
- F27B7/2016—Arrangements of preheating devices for the charge
- F27B7/2041—Arrangements of preheating devices for the charge consisting of at least two strings of cyclones with two different admissions of raw material
- F27B7/205—Arrangements of preheating devices for the charge consisting of at least two strings of cyclones with two different admissions of raw material with precalcining means on the string supplied with exhaust gases from the cooler
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
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- General Engineering & Computer Science (AREA)
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- Chemical & Material Sciences (AREA)
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Abstract
The invention discloses a predecomposition kiln tail system outside of a cement kiln, which can treat raw materials with combustibles. The kiln tail system comprises a multistage whirlwind preheater and a raw material precalcination furnace, wherein the upper part of the raw material precalcination furnace is provided with a belting air flow outlet, the bottom part thereof is provided with an air flow inlet and the lower part thereof is provided with a material inlet; the air flow inlet is connected with an air outlet of an N-stage whirlwind preheater of the multistage whirlwind preheater; the belting air flow outlet is connected with an N-1-stage whirlwind preheater; a material inlet is connected with an N-2-stage whirlwind preheater or directly connected with a feeding device. The predecomposition kiln tail system can effectively utilize the cement raw materials with combustibles to calcine cement clinker, fully consider heating characteristics of the burning of the combustibles, organically combine the functional area divisions of all parts of the preheater of the predecomposition technique, realize the new breakthrough of a novel dry way predecomposition kiln tail system for treating the raw materials with combustibles and calcining cement clinker, improve the running rate of the system and expand the utilization of unconventional low-quality raw material resources.
Description
Technical field
The present invention relates to the system that a kind of cement industry is used for raw material preheating, raw material decomposition and fuel combustion, the particularly a kind of outer nsp kiln tail system of cement kiln that can handle band combustible raw material.
Background technology
Clinker is a cement slurry in preheating and decomposition after high-temperature calcination and producing.Cement slurry is mainly formed through the grinding homogenizing by calcareous raw material, clayey raw material and correction material.The production technology of current clinker generally adopts the outer using predecomposition technology of kiln, this technology also is current state-of-the-art technology of producing cement, be characterized in: have the suspended preheater system of the outer predecomposition of kiln, it mainly is made up of dore furnace, multistage cyclone preheater and connection airduct and material pipe etc.Coal dust is completing combustion in dore furnace, raw material fully decompose in dore furnace, the high-temperature gas that goes out dore furnace in pre-heating system through repeatedly heat exchange, reach the purpose that reduces the pre-heating system EGT and improve the material charging temperature, thereby improve the heat exchange efficiency of kiln tail nsp kiln tail system.The outer nsp kiln tail system of existing cement kiln is when handling the high raw material of combustible content, after combustible enters the secondary or one-level preheater blast pipe of pre-heating system, progressively heat up and follow combustible burning heat release, cause the one-level of system or secondary or three grades of preheaters to stick to equipment limit wall because of hot-spot makes material, can cause preheater tapering or material pipe plug plug, cause producing and normally to carry out.Therefore, the conventional at present outer using predecomposition technology of kiln is not suitable for the high raw material of processing combustible content.
For satisfying cement production process, producing the required raw material of cement at present is the requirement that must reach certain, and particularly the raw material that is adopted for the outer using predecomposition technology of kiln will limit the content of harmful constituent and combustible.
The cement slurry of band combustible is meant cement slurry owing to contain a certain amount of combustible in certain or several raw material, such as carbon residue, organic matter etc., cause the combustible content of cement slurry to exceed standard (the carbon residue loss on ignition can not surpass 0.5% in the outer using predecomposition technology control of the conventional kiln raw material), in presents, the carbon residue loss on ignition is defined as the cement slurry of band combustible above 0.5% cement slurry; With the carbon residue loss on ignition be no more than 0.5% or when not containing combustible cement slurry be defined as conventional cement slurry.Since combustible can be in high temperature gas flow oxidizing fire and release heat, so be with the cement slurry of combustible outside the kiln of routine, normally not used in the nsp kiln tail system.When choosing, generally do not adopt cement raw material the raw material of band combustible.Up to the present, also there is not the special technical scheme of handling at the scale of band combustible raw material both at home and abroad.Yet along with social development and industrial propelling, the problem that resource tightens shows especially day by day, and the demand that develops unconventional low grade material production cement is more and more urgent.In addition, owing to generally contain combustible in the mine resources of some areas, build the cement plant in these areas and just must solve the problem of using band combustible cement slurry, exploitation can be handled the manufacture of cement new technology of band combustible cement slurry.
Summary of the invention
The present invention provides a kind of outer nsp kiln tail system of cement kiln that can handle band combustible raw material for solving the technical problem that exists in the known technology, and this system can handle the cement slurry of band combustible.
First technical scheme that the present invention takes for the technical problem that exists in the solution known technology is: a kind of outer nsp kiln tail system of cement kiln that can handle band combustible raw material, comprise feed arrangement, the multistage cyclone preheater, dore furnace, the tertiary air pipeline, rotary kiln, this system also comprises raw material precalcining stove, the top of described raw material precalcining stove is provided with band material air stream outlet, the bottom is provided with air flow inlet, the bottom is provided with material inlet, the air outlet of the N level cyclone preheater in described air flow inlet and the described multistage cyclone preheater is connected, described band material air stream outlet is connected with the blast pipe of N-1 level cyclone preheater, described material inlet is connected with the feed opening of N-2 level cyclone preheater, described feed arrangement is connected with the blast pipe of second level cyclone preheater, wherein, N represents the progression of certain one-level cyclone preheater, and N is smaller or equal to any natural number of 6 more than or equal to 4.
Described feed arrangement is provided with feeding-distribution device.
Described raw material precalcining stove divides the airduct road to be connected with described tertiary air pipeline by tertiary air.
Described raw material precalcining stove comprises cylinder, the cylinder below is provided with down choke, following choke below is provided with air flow inlet, and the sidewall of this raw material precalcining stove bottom is provided with tertiary air inlet and material inlet, and described top of going up cylinder is provided with band material air stream outlet.
Second technical scheme that the present invention takes for the technical problem that exists in the solution known technology is: a kind of outer nsp kiln tail system of cement kiln that can handle band combustible raw material, comprise feed arrangement, the multistage cyclone preheater, dore furnace, the tertiary air pipeline, rotary kiln, it is characterized in that, this system also comprises raw material precalcining stove, the top of described raw material precalcining stove is provided with band material air stream outlet, the bottom is provided with air flow inlet, the bottom is provided with material inlet, described air flow inlet is connected with the air outlet of second level cyclone preheater, described band material air stream outlet is connected with the blast pipe of first order cyclone preheater, and described material inlet is connected with described feed arrangement.
Described feed arrangement is provided with feeding-distribution device.
Described raw material precalcining stove divides the airduct road to be connected with described tertiary air pipeline by tertiary air.
The 3rd technical scheme that the present invention takes for the technical problem that exists in the solution known technology is: a kind of outer nsp kiln tail system of cement kiln that can handle band combustible raw material, comprise feed arrangement, the multistage cyclone preheater, dore furnace, the tertiary air pipeline, rotary kiln, it is characterized in that, this system also comprises raw material precalcining stove, the top of described raw material precalcining stove is provided with band material air stream outlet, the bottom is provided with air flow inlet, the bottom is provided with material inlet, described air flow inlet is connected with the air outlet of third level cyclone preheater, described band material air stream outlet is connected with the blast pipe of second level cyclone preheater, and described material inlet is connected with the feed opening of described feed arrangement or first order cyclone preheater.
Described feed arrangement is provided with feeding-distribution device.
Described raw material precalcining stove divides the airduct road to be connected with described tertiary air pipeline by tertiary air.
Advantage and good effect that the present invention has are: by raw material precalcining stove is set between multistage preheater, can effectively utilize band combustible cement slurry calcination of cement clinker, fully take into account the characteristic exotherm of combustible burning, and the functional areas that organically combine each position of pre-heating system of using predecomposition technology are divided, realized the new breakthrough of new dry process nsp kiln tail system processing band combustible cement slurry calcination of cement clinker, thereby effectively improve system's running rate, enlarge the utilization of unconventional low grade material resource.Solved the technical problem that the burning of combustible in the insurmountable raw material of conventional nsp kiln tail system heat release causes system jams, enlarge manufacture of cement and can utilize the scope of raw material, promoted the reasonable resources utilization, realization contains the extensive recycling in mine of combustible, save the high-quality mine resources, reduce enterprise's production cost, have very strong operability and practicality.
Description of drawings
Fig. 1 uses the outer nsp kiln tail system structural representation of single series cement kiln of the present invention;
Fig. 2 uses the outer nsp kiln tail system structural representation of bi serie cement kiln of the present invention;
Fig. 3 is the structural representation of raw material precalcining stove among Fig. 1 or Fig. 2.
Among the figure: band arrow dotted line is an airflow direction, and band arrow solid line is the materials flow direction; 1, feeding-distribution device, 2, first order cyclone preheater, 3, second level cyclone preheater, 4, third level cyclone preheater, 5, raw material precalcining stove, 6, slide valve, 7, fourth stage cyclone preheater, 8, dore furnace, 9, level V cyclone preheater, 10, tertiary air divides the airduct road, and 11, the tertiary air pipeline, 12, kiln tail smoke-box, 13, rotary kiln, 14, air flow inlet, 15, following choke, 16, material inlet, 17, tertiary air inlet, 18, lower prop, 19, middle choke, 20, go up cylinder, 21, band material air stream outlet.
The specific embodiment
For further understanding summary of the invention of the present invention, characteristics and effect, exemplify following examples now, and conjunction with figs. is described in detail as follows:
Embodiment 1:
See also Fig. 1 and Fig. 3, use the outer nsp kiln tail system of single series cement kiln of the present invention, comprise the feed arrangement (not shown), five-stage cyclone preheater, dore furnace 8, tertiary air pipeline 11, rotary kiln 13, raw material precalcining stove 5, the top of raw material precalcining stove 5 is provided with band material air stream outlet 21, the bottom is provided with air flow inlet 14, the bottom is provided with material inlet 16, air flow inlet 14 is connected with the air outlet of fourth stage cyclone preheater 7, band material air stream outlet is connected with the blast pipe of third level cyclone preheater 4, and material inlet is connected with the feed opening of second level cyclone preheater.Feed arrangement is provided with raw material feeding-distribution device 1.Raw material precalcining stove 5 divides airduct road 10 to be connected with tertiary air pipeline 11 by tertiary air.Tertiary air divides airduct road 10 to be provided with gate valve 6.
In the present embodiment, the multistage cyclone preheater is to form five-stage cyclone preheater by first order cyclone preheater 2, second level cyclone preheater 3, third level cyclone preheater 4, fourth stage cyclone preheater 7, level V cyclone preheater 8.But be not limited thereto, preheater progression can also be six grades, level Four, three grades or secondary.Dore furnace 8 can be the type that spurts, pipeline type, cyclone-type, fluidization type or multiple pattern such as combined.
In the present embodiment, raw material precalcining stove 5 is connected between fourth stage preheater and the third level preheater, but be not limited thereto link position, raw material precalcining stove 5 also can be adopted and be connected in a like fashion in this system between the fourth stage cyclone preheater and level V cyclone preheater; When preheater progression was six grades, raw material precalcining stove also can be adopted and be connected in a like fashion in the system between level V cyclone preheater and the 6th grade of cyclone preheater.The particular location of raw material precalcining stove is different and different according to factors such as the composition of combustible in the raw material, content, initiation temperatures.
Key of the present invention is: this nsp kiln tail system is on the basis of existing conventional new dry process nsp kiln tail system, increases a raw material precalcining stove 5 again, and tertiary air is partly introduced raw material precalcining stove 5.Like this, form a kind of outer nsp kiln tail system of cement kiln that can handle band combustible raw material by raw material precalcining stove 5, dore furnace 8 and multistage cyclone preheater.The feed arrangement of this nsp kiln tail system is provided with feeding-distribution device 1, the present invention is because of having adopted feeding-distribution device 1 of the prior art, make the raw material feeding manner comparatively flexible, when handling the cement slurry of band combustible, raw material can feed the import airduct of second level cyclone preheater 3, realize the heat exchange of level Four preheater.Uppermost first order cyclone preheater 2, second level cyclone preheater 3 are composed in series a cyclone dust collection system, the raw material of band combustible are strengthened gathered dust.When handling conventional cement slurry, raw material can feed the blast pipe of first order cyclone preheater 2, realize the heat exchange of Pyatyi preheater, thereby can reduce the EGT that pre-heating system, and then effectively reduce system's hear rate.Raw material precalcining stove 5 can replenish the introducing tertiary air, replenishes the required oxygen of combustible burning, by divide the flow that increases gate valve 6 control tertiary airs on the airduct road 10 at tertiary air.Composition according to combustible in the raw material is different with content etc., and raw material precalcining stove also can not need replenish the introducing tertiary air.Adopt this nsp kiln tail system can effectively utilize band combustible cement slurry calcination of cement clinker.This nsp kiln tail system fully takes into account the characteristic exotherm of combustible burning, and the functional areas that organically combine each position of pre-heating system of using predecomposition technology are divided, realized that new dry process nsp kiln tail system makes full use of the new breakthrough of the high raw material calcination of cement clinker of combustible content, thereby effectively improve system's running rate, enlarge the utilization of unconventional low grade material resource.
See also Fig. 3, raw material precalcining stove 5 in the present embodiment, raw material precalcining stove 5 is a kind of combustible burner, comprise the last cylinder 20 that is communicated with by middle choke 19, lower prop 18, perhaps for there not being the cylinder of middle part reducing, the cylinder below is provided with down choke 15, following choke 15 belows are provided with the air flow inlet 14 that communicates with the air outlet of fourth stage cyclone preheater 7, the sidewall of raw material precalcining stove 5 bottoms is provided with the material inlet 16 that divides tertiary air inlet 17 that airduct road 10 is connected to be connected with feed opening with second level cyclone preheater 3 with tertiary air, and the top of last cylinder 20 is provided with the band material air stream outlet 21 that is connected with the blast pipe of third level cyclone preheater 4.
The operation principle of above-mentioned raw material precalcining stove 5:
Raw material enter raw material precalcining stove 5 from material inlet 16, and go into furnace gas stream contact heat-exchanging, and temperature rises to the burning-point of most of combustible rapidly.Go in the furnace gas stream and have a spot of oxygen content, can cause the burning of combustible, when oxygen content is not enough to guarantee that combustible is finished burning in going into furnace gas stream, can enter the mouth from tertiary air and 17 import tertiary airs, tertiary air is the high-temperature gas that extracts from the kiln hood cooler, its oxygen content and air are approaching, and about 21%.Air communication the recirculating zone occurs when crossing middle part choke 19, and the effect of promptly spurting has prolonged solid and gas time of staying ratio, helps combustible completing combustion in the precalcining stove.If raw material precalcining stove does not have the middle part reducing, also can guarantee combustible completing combustion in the precalcining stove by suitably increasing the volume of raw material precalcining stove.The raw material that burn are completely discharged from band material air stream outlet 21 with air-flow, enter third level cyclone preheater 4 and carry out gas solid separation.Precalcining stove 5 plays the purpose of calcining combustible in the raw material fully.
As known to persons skilled in the art, above-mentioned raw material precalcining stove 5 is the type that spurts.Raw material precalcining stove 5 can also adopt pipeline type, cyclone-type, fluidization type or multiple pattern such as combined, to those skilled in the art, is conspicuous, is not repeated at this.
The operation principle of present embodiment:
Be delivered to the kiln tail by lifting means after the cement slurry process grinding of band combustible, the homogenizing, feeding-distribution device 1 can be controlled the position that the cement slurry of being with combustible enters this nsp kiln tail system flexibly.When handling the cement slurry of band combustible, the import airduct of raw material feeding second level cyclone preheater 3 is realized the heat exchange of level Four preheater; When handling conventional cement slurry, raw material can feed the import airduct of first order cyclone preheater 2, realize the heat exchange of Pyatyi preheater.
When handling the cement slurry of band combustible, the cement slurry of band combustible enters behind the import airduct of second level cyclone preheater 3 through abundant dispersion, and carry out heat exchange with waste gas and realize pre-heating temperature elevation, dust-contained airflow enters second level cyclone preheater 3 and carries out gas solid separation then, isolated material feeding raw material precalcining stove 5, the air-flow after the separation enters first order cyclone preheater 2 and strengthens the separation dedusting once more.Gas flow temperature is between 700 ℃～900 ℃ in the raw material precalcining stove 5, and the combustible in the raw material is burning rapidly under this temperature.The required oxygen that burns is mainly provided by excess air in the waste gas that goes out fourth stage cyclone preheater 7, also can enter raw material precalcining stove 5 as a supplement by draw a part of tertiary air on tertiary-air pipe 11 simultaneously.The tertiary air pipeline 10 of going into raw material precalcining stove is provided with slide valve 6 can regulate tertiary air flow into raw material precalcining stove, to guarantee the completing combustion of combustible in raw material precalcining stove.Combustible in the raw material after the completing combustion, passes through third level cyclone preheater 4 successively in raw material precalcining stove, fourth stage cyclone preheater 7, and dore furnace 8, level V cyclone preheater 9 enter rotary kiln 13 calcinings and make clinker behind the kiln tail smoke-box 12.
When handling conventional cement slurry, raw material enter the import airduct of first order cyclone preheater 2, this moment is similar with the kiln tail nsp kiln tail system course of work of routine, raw material are through first order cyclone preheater 2, second level cyclone preheater 3 carries out gas solid separation, isolated material feeding raw material precalcining stove 5, raw material precalcining this moment stove 5 just plays a heat exchange effect that connects airduct.
Embodiment 2:
A kind of outer nsp kiln tail system of cement kiln that can handle band combustible raw material, raw material precalcining furnace gas inflow entrance is connected with the air outlet of second level cyclone preheater, the band material air stream outlet of raw material precalcining stove is connected with the blast pipe of first order cyclone preheater, and the material inlet of raw material precalcining stove is connected with feed arrangement.When handling the cement slurry of band combustible, raw material directly feed raw material precalcining stove, with the air-flow heat exchange from second level cyclone preheater, after the combustible in the raw material fully burns, enter first order cyclone preheater, adopt the structure identical to handle cement slurry afterwards with conventional kiln tail system.Other structures are identical with embodiment 1, and operation principle is also identical with embodiment.
Embodiment 3:
A kind of outer nsp kiln tail system of cement kiln that can handle band combustible raw material, raw material precalcining furnace gas inflow entrance is connected with the air outlet of third level cyclone preheater, the band material air stream outlet of raw material precalcining stove is connected with the blast pipe of second level cyclone preheater, and feed arrangement is connected with the material inlet of raw material precalcining stove or the blast pipe of first order cyclone preheater.When feed arrangement is connected with the material inlet of raw material precalcining stove, feed arrangement will directly be delivered in the raw material precalcining stove with the cement slurry of combustible, after combustible in the raw material fully burns, enter second level cyclone preheater, carry out gas solid separation, other structures are identical with embodiment 1, and operation principle is also identical with embodiment.When feed arrangement was connected with the blast pipe of first cyclone preheater, the cement slurry of band combustible was after one-level heat exchange and gas solid separation, and the material that goes out first order cyclone preheater enters raw material precalcining stove, and the combustible in the raw material is fully burnt.Other structures are identical with embodiment 1, and operation principle is also identical with embodiment.
See also Fig. 2, use bi serie cement kiln end nsp kiln tail system of the present invention, be not repeated at this.
Principle of the present invention is, the cement slurry of band combustible entered raw material precalcining stove before system may result in blockage, the completing combustion in raw material precalcining stove of combustible in the raw material, thereby the harm of avoiding combustible to result in blockage in other position partial combustion heat release of this system.Simultaneously, after the raw material of band combustible entered this system, the dust-collecting efficiency that system may occur sharply reduced, and the present invention considers to adopt the mode that the series connection of secondary preheater is gathered dust to handle technically.
Although in conjunction with the accompanying drawings the preferred embodiments of the present invention are described above; but the present invention is not limited to the above-mentioned specific embodiment; the above-mentioned specific embodiment only is schematic; be not restrictive; those of ordinary skill in the art is under enlightenment of the present invention; not breaking away under the scope situation that aim of the present invention and claim protect, can also make a lot of forms, these all belong within protection scope of the present invention.
Claims (10)
1. can handle nsp kiln tail system outside the cement kiln of being with the combustible raw material for one kind, comprise feed arrangement, the multistage cyclone preheater, dore furnace, the tertiary air pipeline, rotary kiln, it is characterized in that, this system also comprises raw material precalcining stove, the top of described raw material precalcining stove is provided with band material air stream outlet, the bottom is provided with air flow inlet, the bottom is provided with material inlet, the air outlet of the N level cyclone preheater in described air flow inlet and the described multistage cyclone preheater is connected, described band material air stream outlet is connected with the blast pipe of N-1 level cyclone preheater, described material inlet is connected with the feed opening of N-2 level cyclone preheater, described feed arrangement is connected with the blast pipe of second level cyclone preheater, wherein, N represents the progression of certain one-level cyclone preheater, and N is smaller or equal to any natural number of 6 more than or equal to 4.
2. the outer nsp kiln tail system of cement kiln that can handle band combustible raw material according to claim 1, it is characterized in that: described feed arrangement is provided with feeding-distribution device.
3. the outer nsp kiln tail system of cement kiln that can handle band combustible raw material according to claim 1 and 2, it is characterized in that: described raw material precalcining stove divides the airduct road to be connected with described tertiary air pipeline by tertiary air.
4. the outer nsp kiln tail system of cement kiln that can handle band combustible raw material according to claim 1, it is characterized in that: described raw material precalcining stove comprises cylinder, described cylinder below is provided with down choke, following choke below is provided with described air flow inlet, the sidewall of this raw material precalcining stove bottom is provided with tertiary air inlet and described material inlet, and the top of described cylinder is provided with described band material air stream outlet.
5. can handle nsp kiln tail system outside the cement kiln of being with the combustible raw material for one kind, comprise feed arrangement, the multistage cyclone preheater, dore furnace, the tertiary air pipeline, rotary kiln, it is characterized in that, this system also comprises raw material precalcining stove, the top of described raw material precalcining stove is provided with band material air stream outlet, the bottom is provided with air flow inlet, the bottom is provided with material inlet, described air flow inlet is connected with the air outlet of second level cyclone preheater, described band material air stream outlet is connected with the blast pipe of first order cyclone preheater, and described material inlet is connected with described feed arrangement.
6. the outer nsp kiln tail system of cement kiln that can handle band combustible raw material according to claim 5, it is characterized in that: described feed arrangement is provided with feeding-distribution device.
7. according to claim 5 or the 6 described outer nsp kiln tail systems of cement kiln that can handle band combustible raw material, it is characterized in that: described raw material precalcining stove divides the airduct road to be connected with described tertiary air pipeline by tertiary air.
8. can handle nsp kiln tail system outside the cement kiln of being with the combustible raw material for one kind, comprise feed arrangement, the multistage cyclone preheater, dore furnace, the tertiary air pipeline, rotary kiln, it is characterized in that, this system also comprises raw material precalcining stove, the top of described raw material precalcining stove is provided with band material air stream outlet, the bottom is provided with air flow inlet, the bottom is provided with material inlet, described air flow inlet is connected with the air outlet of third level cyclone preheater, described band material air stream outlet is connected with the blast pipe of second level cyclone preheater, and described material inlet is connected with the feed opening of described feed arrangement or first order cyclone preheater.
9. the outer nsp kiln tail system of cement kiln that can handle band combustible raw material according to claim 8, it is characterized in that: described feed arrangement is provided with feeding-distribution device.
10. according to Claim 8 or the 9 described outer nsp kiln tail systems of cement kiln that can handle band combustible raw material, it is characterized in that: described raw material precalcining stove divides the airduct road to be connected with described tertiary air pipeline by tertiary air.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910304794XA CN101608866B (en) | 2009-07-24 | 2009-07-24 | Predecomposition kiln tail system outside of cement kiln, which can treat raw materials with combustibles |
| PCT/CN2010/072818 WO2011009321A1 (en) | 2009-07-24 | 2010-05-15 | Predecomposition kiln tail system used outside of cement kiln for processing raw materials with combustible substances |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910304794XA CN101608866B (en) | 2009-07-24 | 2009-07-24 | Predecomposition kiln tail system outside of cement kiln, which can treat raw materials with combustibles |
Publications (2)
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| CN101608866B (en) * | 2009-07-24 | 2010-08-25 | 天津水泥工业设计研究院有限公司 | Predecomposition kiln tail system outside of cement kiln, which can treat raw materials with combustibles |
| TWI457520B (en) * | 2012-09-19 | 2014-10-21 | Ind Tech Res Inst | Recirculated-suspension pre-calciner system and operating method thereof |
| CN103342371A (en) * | 2013-07-05 | 2013-10-09 | 天津水泥工业设计研究院有限公司 | Process and device for whitening calcined black talc |
| TWI516302B (en) | 2013-12-11 | 2016-01-11 | 財團法人工業技術研究院 | Loop tower co2 capture system, carbonator, calciner and operating method thereof |
| CN105299625B (en) * | 2015-11-23 | 2017-10-13 | 北京凯盛建材工程有限公司 | A kind of energy-saving and emission-reduction remodeling method of reduction DDF dore furnace nitrogen oxide emissions |
| CN106830718A (en) * | 2016-12-09 | 2017-06-13 | 芜湖新兴铸管有限责任公司 | For the feeding-distribution device of preheating in rotary kiln device |
| CN108772405A (en) * | 2018-06-25 | 2018-11-09 | 安徽海螺集团有限责任公司 | A kind of cement kiln flue gas introduces the connection structure of CCUS systems |
| CN109485225A (en) * | 2018-10-24 | 2019-03-19 | 四川双马宜宾水泥制造有限公司 | A kind of method of cement plant processing domestic sludge |
| CN109896760A (en) * | 2019-04-04 | 2019-06-18 | 南京凯盛国际工程有限公司 | A kind of device and technique using cement kiln end lime burning |
| CN112654828B (en) * | 2019-08-12 | 2022-07-22 | 天津水泥工业设计研究院有限公司 | Cement predecomposition kiln system and method for preparing cement clinker |
| CN112654590B (en) * | 2019-08-12 | 2022-07-01 | 天津水泥工业设计研究院有限公司 | Cement kiln system capable of adjusting CO2 enrichment amount and improved by online decomposing furnace and using method thereof |
| CN115768734A (en) * | 2020-11-12 | 2023-03-07 | 天津水泥工业设计研究院有限公司 | Cement kiln system and method for preparing cement clinker |
| CN112500001B (en) * | 2020-12-16 | 2022-07-05 | 天津水泥工业设计研究院有限公司 | Low-energy-consumption carbon-enriched cement production system and method for producing cement clinker |
| CN113149482A (en) * | 2021-05-25 | 2021-07-23 | 中国华能集团清洁能源技术研究院有限公司 | System for treating waste fan blade in rotary kiln and working method thereof |
| CN113121135A (en) * | 2021-05-25 | 2021-07-16 | 中国华能集团清洁能源技术研究院有限公司 | System for resource utilization of waste blades in rotary kiln and working method thereof |
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| CN1113212C (en) * | 1996-07-15 | 2003-07-02 | 中国建筑材料科学研究院 | External decomposition technology for waste heat generating technology of cement kiln |
| DE10202776A1 (en) * | 2002-01-25 | 2003-07-31 | Kloeckner Humboldt Wedag | Plant for the production of cement clinker |
| CN2551950Y (en) * | 2002-07-05 | 2003-05-21 | 孙占元 | Preheating decomposing device for outside of kiln |
| CN201032355Y (en) * | 2007-05-21 | 2008-03-05 | 南京凯盛水泥技术工程有限公司 | Cement kiln external predecomposition kiln rear system |
| CN101182142B (en) * | 2007-12-03 | 2011-09-07 | 天津水泥工业设计研究院有限公司 | Method for calcining cement by carbide slag replacing whole limestone |
| CN101608866B (en) * | 2009-07-24 | 2010-08-25 | 天津水泥工业设计研究院有限公司 | Predecomposition kiln tail system outside of cement kiln, which can treat raw materials with combustibles |
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| CN101608866A (en) | 2009-12-23 |
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