CN101215485A - Fuel for firing into rotary kiln cement clinker - Google Patents
Fuel for firing into rotary kiln cement clinker Download PDFInfo
- Publication number
- CN101215485A CN101215485A CNA2007100097609A CN200710009760A CN101215485A CN 101215485 A CN101215485 A CN 101215485A CN A2007100097609 A CNA2007100097609 A CN A2007100097609A CN 200710009760 A CN200710009760 A CN 200710009760A CN 101215485 A CN101215485 A CN 101215485A
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- Prior art keywords
- fuel
- rotary kiln
- cement clinker
- coal
- kiln cement
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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- Curing Cements, Concrete, And Artificial Stone (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
A fuel which is used for rotary kiln cement clinker firing is composed of raw materials with the following weight percentage: coal 3-80, straw substances 0-90, forest products wastes 0-95 and food industry by-product residues 0-70. The straw substances refer to rice straws, wheat straws, cotton stalks, sesame stalks, soybean straws, corn stalks, sorghum stalks, rice husks, peanut shells, soybean shells and corn sticks, the forest products wastes refer to defective bamboo, wood, tree branches, leaves, shrubs, faggot straws and sawdust and wood wool corner scrap materials in the bamboo and wood-processing industry, the food industry by-product residues refer to bran, wheat skin, squeezing meal cake, bean dregs and wine lees, and the coal refers to bituminite, anthracite and coke coal powder. The flue raw materials which are used for the rotary kiln cement clinker firing have wide selecting range, simple preparation, convenient use and rapid burning speed and are beneficial for protecting atmosphere circumstances.
Description
Technical field
The invention belongs to Cement industry fuel, the fuel that burns till in particular for rotary kiln cement clinker.
Background technology
Be used for aspect the fuel that rotary kiln cement clinker burns till, all be to adopt high-volatile (〉=25%) for a long time, the high-quality cigarette heavy metal or the heavy oil of low ash (≤20.0%) are made fuel, yet along with being becoming tight day by day of global energy supply, traditional makes the fuel calcining cement clinker with high-quality bituminous coal or heavy oil, has seriously restricted the economic results in society and the tempo of cement production enterprise.To this, scientific research institution and professional person are through a large amount of work both at home and abroad, though obtained numerous scientific payoffss and patented technology, but summarizing to get up its major technique and method has: the first kind is by the admixture ignition dope or grinds coal charge to such an extent that very thin mode improves low-volatile, the soft coal of ash-rich or anthracitic combustionvelocity are used fuel thereby alternative high-quality bituminous coal or heavy oil burn till as rotary kiln cement clinker.These class methods still exist many defectives, the one, owing to contain other material such as sulphur in the coal, and SA cigarette inferior and hard coal content are higher, and it is bigger to substitute the harmful exhausts such as sulfurous gas that produce in the high-quality bituminous coal afterfire process, certainly will bring even more serious infringement to atmospheric environment; The 2nd, along with bringing into of ash-rich burnt till quality to cement clinker and made the negative impact factor of generation more, particularly the special cement grog is burnt till quality, other negative impact of bringing into of ash-rich is far longer than the benefit that the front gives, even causes cement clinker waste product to occur; The 3rd, the present commercially available general valency height of combustion-supporting agent for fuel coal, volume is big, to the coal poor selectivity, and has a strong impact on the Na of rotary kiln clinker sintering conditions and cement end product quality
+, K
+, Cl
-, Mg
2+High Deng harmful element content.Second class is to utilize domestic waste, waste rubber, plastic waste to substitute the fuel of part coal as rotary kiln cement clinker, though and these class methods have certain advantage desirable on profit is useless, need carry out the special project transformation and invest big whole rotary kiln production process equipment but still exist, the actual little shortcoming of amount that substitutes, simultaneously in the production process in the exhaust gas discharged oxious component increase, the contained heavy metal of the ashes in afterburnt, can not finish being melted into admittedly among the clinker mineral, the heavy metal of free shape will still produce secondary pollution to environment.
Summary of the invention
Purpose of the present invention just provide a kind of production cost low, just with convenient, discharge amount of exhaust gas is little in the combustion processes, rotary kiln cement clinker sintering conditions and clinker quality is not had the fuel that rotary kiln cement clinker burns till that is used for of negative impact.
Of the present inventionly be used for the fuel that rotary kiln cement clinker burns till, form by following raw materials by weight percent: coal 3-80, stalk thing 0-90, Forest products waste 0-95, grocery trade substandard goods residue 0-70.
Described stalk thing is meant that combustion heat value is not less than the straw of 1000kj/kg, straw, cotton stalk, sesame stalk, soybean stalk, cornstalk, sorghum stalk, rice husk, Pericarppium arachidis hypogaeae, soybean hulls, corn ear.
Described Forest products waste is meant that combustion heat value is not less than 1000kj/kg, and afterburnt ashes content is less than sawdust, the wood shavings leftover bits of 30% inferior bamboo and wood, branch, leaf, shrub, faggot and bamboo wood processing industry.
Described grocery trade substandard goods residue is meant that the afterburnt ashes are less than 30% chaff, wheat skin, squeezing dregs of rice cake, bean dregs, vinasse.
Described coal is meant that ash is less than 48% bituminous coal, hard coal, coal coke end.
Of the present inventionly be used for the fuel process that rotary kiln cement clinker burns till and be:
1, in advance with various raw materials cool shine or dry to water content less than 3%;
2, respectively dried stalk thing, Forest products waste, grocery trade substandard goods residue are ground into 30-80 purpose powder with pulverizer, coal is worn into 80um square hole sieve screen over-size less than 15% coal dust;
3, raw material is mixed promptly by proportioning.
During use, by transport pipe or burner spray in the rotary kiln and decomposing furnace in calcination of cement clinker.Can also measure with volume pump by the shared weight percent of each raw material, by hyperchannel transport pipe or burner spray in the rotary kiln and decomposing furnace in calcining cement clinker.
The fuel that is used for using under fuel that rotary kiln clinker burns till and the present situation provided by the present invention is compared, and has following advantage:
1, the material choice that this fuel adopted haves a wide reach, and based on farming, the useless remains of forestry, cheap and easy to get.
2, this fuel fabrication is simple and easy, and is easy to use, need not change the existing production process equipment of rotary system, is applicable to various kiln types, particularly new dry process rotary kiln, easily promotes.
3, in this fuel to influencing the Na of rotary kiln cement clinker sintering conditions and quality product
-, K
-, Cl
-Deng harmful element content only be ten thousand/several, highly active after-flame ashes can improve the burn-ability of cement slurry effectively, reduce the firing temperature of cement clinker, promote the particularly raising of special cement grog output and quality of cement clinker.
4, this fuel combustion speed is fast; discharge amount of exhaust gas in the combustion processes only is a coal; heavy oil kind fuel 70% in; simultaneously highly active organic ashes can timely and effective, fully absorb harmful elements such as transforming the fluorine that decomposites under the high temperature in the cement slurry calcination process, sulphur, help protecting atmospheric environment.
Embodiment
Embodiment 1: a kind ofly be used for the fuel that rotary kiln cement clinker burns till, by Pericarppium arachidis hypogaeae, the sawdust of bamboo wood processing industry, squeezing tea-seed oil dregs of rice cake, hard coal is as raw material, each raw material fired basis technical analysis the results are shown in Table-1, be by weight percentage: Pericarppium arachidis hypogaeae 35%, sawdust 41%, tea-seed oil dregs of rice cake 13%, hard coal 11% is prepared the fuel that is used for rotary kiln cement clinker, its preparation method is: in advance cold is shone the exsiccant Pericarppium arachidis hypogaeae, tea-seed oil dregs of rice cake is ground into 40-50 purpose powder, sawdust dry to moisture less than 3.0%, pulverized anthracite is milled to the 80um square hole and tails over less than after 15%, mixes.Table the-2nd, other processing condition same case next time the rotary kiln cement clinker burn till rotary system production technology economic target when using high-quality bituminous coal and two kinds of different fuels of fuel of the present invention respectively.
Embodiment 2: a kind ofly be used for the fuel that rotary kiln cement clinker burns till, select the cotton stalk in the stalk thing for use, the ring of leftover bits and hard coal are as constitutive material in the bamboo wood processing industry, each raw material fired basis technical analysis the results are shown in Table-1, be by weight percentage: cotton stalk 20%, ring 65%, hard coal 15% is prepared and is used for the fuel that rotary kiln cement clinker burns till, its preparation method is: in advance with the cotton stalk, ring is cool shine dry to moisture less than 3.0%, become 30-50 purpose powder with the pulverizer separated pulverizing, pulverized anthracite is milled to 80um and tails over less than after 15%, mixes.Implementation result sees table-2 for details.
Embodiment 3: a kind ofly be used for the fuel that rotary kiln cement clinker burns till, select the little assorted tree of shrub in the Forest products for use, preparation is used for the fuel that rotary kiln cement clinker burns till as constitutive material for the rice bran of grain processing industry byproduct and coke, each primary industry analytical results sees Table-1, shining the assorted tree cold of undershrub dry in advance and be crushed to 30-50 purpose powder, the coke fines grinding is tailed over less than after 10% to 80um, by the assorted tree of shrub powder 30%, rice bran 60%, the weight percent of coke 10% measures with volume pump, sprays into the fuel that burns till as white cement clinker in the rotary kiln simultaneously by hyperchannel transport pipe burner.Table the-3rd, the techno-economic effect synopsis that the fuel for preparing with high-quality bituminous coal and the present invention on the identical basis of its processing condition burns till white cement clinker.
Embodiment 4: a kind ofly be used for the fuel that rotary kiln cement clinker burns till, selecting straw, the pine branch (skin) of Forest products waste, hard coal in the stalk thing for use is constitutive material, each primary industry analytical results sees Table-1, in advance straw, pine branch (skin) are being dried, and be ground into 30-50 purpose powder, pulverized anthracite is milled to 80mm and tails over less than after 15%, press straw powder 80%, pine branch (skin) powder 15%, pulverized anthracite 5% is equipped with to mix to make and is used for the fuel that the rotary kiln cement clinker coal becomes, and its implementation result sees Table-2
Table-1 various primary industry analytical results tables
| Title material | Moisture (%) | Fugitive constituent (%) | Ash (%) | Lower heat value (kj/kg) |
| Pericarppium arachidis hypogaeae | 1.53 | 42.87 | 11.48 | 18929.5 |
| Straw | 0.97 | 45.36 | 10.35 | 17505.9 |
| Rice bran | 1.04 | 42.51 | 10.72 | 19376.6 |
| The cotton stalk | 1.89 | 38.42 | 11.21 | 18284.3 |
| The assorted tree of shrub | 2.21 | 37.12 | 10.79 | 20150.8 |
| Ring | 2.52 | 37.69 | 11.62 | 20201.0 |
| Pine branch (skin) | 2.17 | 39.38 | 10.96 | 19945.5 |
| Tea material oil meal cake | 0.55 | 34.31 | 12.04 | 19656.9 |
| Sawdust | 1.62 | 39.44 | 12.15 | 19799.2 |
| Hard coal | 1.65 | 4.80 | 33.86 | 20811.8 |
| Coke fines | 1.94 | 2.49 | 25.47 | 24273.0 |
| Embodiment-1 | 1.39 | 35.43 | 14.41 | 25160.2 |
| Embodiment-2 | 1.45 | 32.47 | 15.02 | 19892.0 |
| Embodiment-4 | 1.21 | 40.34 | 11.76 | 18498.0 |
| Embodiment-3 | 1.45 | 36.58 | 12.43 | 20255.0 |
Techno-economic effect synopsis when table-2 high-quality bituminous coal and the present invention prepare fuel and be used for rotary kiln cement clinker and burn till
| Project | High-quality bituminous coal | Embodiment-1 | Embodiment-2 | Embodiment-3 |
| Fuel value (kj/kg) | 25582.6 | 20477.0 | 19892.0 | 18498.0 |
| Cl temperature out ℃ | 310-330 | 290-310 | 290-320 | 280-300 |
| Cl exports CO concentration (5%) | 0.03 | 0.02 | 0.02 | 0.02 |
| Go into kiln raw material rate of decomposition (%) | 89.2 | 94.6 | 95.1 | 93.82 |
| Heat consumption of clinker (kj/kg) | 3567 | 3120 | 3140 | 3265 |
| Kiln system unit-hour output (t) | 65.0 | 72.6 | 72.75 | 70.54 |
| Grog fcao% | 1.42 | 0.83 | 0.97 | 1.01 |
| The average label of grog | 58.7 | 62.0 | 60.5 | 61.5 |
Effect synopsis when table-3 high-quality bituminous coal and the present invention prepare fuel and be used for the rotary kiln white cement clinker and burn till
| Project | High-quality bituminous coal | Embodiment 3 |
| Fuel value | 25160.2 | 20255.0 |
| Heat consumption of clinker kj/kg | 5441.0 | 4815.0 |
| Unit-hour output | 8.6 | 11.25 |
| Iron-holder in the grog (%) | 0.38 | 0.18 |
| Grog whiteness (%) | 85.0 | 94.0 |
| The grog label | 54.0 | 57.5 |
From table-2, as can be seen, provided by the present inventionly be used for the fuel that rotary kiln cement clinker burns till in the table-3, burn till hear rate to reducing cement clinker, improve cement clinker quality and output and all played significant effect.
Claims (5)
1. one kind is used for the fuel that rotary kiln cement clinker burns till, and it is characterized in that: it is to be made by following raw materials by weight percent: coal 3-80, stalk thing 0-90, Forest products waste 0-95, grocery trade substandard goods residue 0-70.
2. according to claim 1ly be used for the fuel that rotary kiln cement clinker burns till, it is characterized in that: described stalk thing is meant that combustion heat value is not less than the straw of 1000kj/kg, straw, cotton stalk, sesame stalk, soybean stalk, cornstalk, sorghum stalk, rice husk, Pericarppium arachidis hypogaeae, soybean hulls, corn ear.
3. according to claim 1ly be used for the fuel that rotary kiln cement clinker burns till, it is characterized in that: described Forest products waste is meant that combustion heat value is not less than 1000kj/kg, and afterburnt ashes content is less than sawdust, the wood shavings leftover bits of 30% inferior bamboo and wood, branch, leaf, shrub, faggot and bamboo wood processing industry.
4. according to claim 1ly be used for the fuel that rotary kiln cement clinker burns till, it is characterized in that: described grocery trade substandard goods residue is meant that the afterburnt ashes are less than 30% chaff, wheat skin, squeezing dregs of rice cake, bean dregs, vinasse.
5. according to claim 1ly be used for the fuel that rotary kiln cement clinker burns till, it is characterized in that: described coal is meant that ash is less than 48% bituminous coal, hard coal, coal coke end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100097609A CN101215485A (en) | 2007-11-02 | 2007-11-02 | Fuel for firing into rotary kiln cement clinker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100097609A CN101215485A (en) | 2007-11-02 | 2007-11-02 | Fuel for firing into rotary kiln cement clinker |
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| CN101215485A true CN101215485A (en) | 2008-07-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2007100097609A Pending CN101215485A (en) | 2007-11-02 | 2007-11-02 | Fuel for firing into rotary kiln cement clinker |
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