JP2004292200A - Combustion improving method of inflammable fuel in burning process of cement clinker - Google Patents

Combustion improving method of inflammable fuel in burning process of cement clinker

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JP2004292200A
JP2004292200A JP2003084466A JP2003084466A JP2004292200A JP 2004292200 A JP2004292200 A JP 2004292200A JP 2003084466 A JP2003084466 A JP 2003084466A JP 2003084466 A JP2003084466 A JP 2003084466A JP 2004292200 A JP2004292200 A JP 2004292200A
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fuel
crushed
inflammable
material
calorific
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Hiroshi Mikami
Akio Nishida
浩 三上
明生 西田
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Ube Ind Ltd
宇部興産株式会社
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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00Hydraulic cements
    • C04B7/36Manufacture of hydraulic cements in general
    • C04B7/43Heat treatment, e.g. precalcining, burning, melting; Cooling
    • C04B7/44Burning; Melting
    • C04B7/4407Treatment or selection of the fuel therefor, e.g. use of hazardous waste as secondary fuel ; Use of particular energy sources, e.g. waste hot gases from other processes
    • C04B7/4423Waste or refuse used as fuel
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00Technologies relating to the processing of minerals
    • Y02P40/10Production of cement
    • Y02P40/12Clinker production
    • Y02P40/125Fuels from renewable energy sources
    • Y02P40/126Waste

Abstract

<P>PROBLEM TO BE SOLVED: To provide a combustion improving method of an inflammable fuel in the burning process of a cement clinker that suppresses elevation, lowering or variance of the combustion gas temperature and further prevents the damage of a kiln brick when inflammable wastes such as woods or plastics are used as an auxiliary fuel in place of pulverized coal. <P>SOLUTION: The inflammable fuel uses the pulverized coal as a main fuel and uses a wood crushed material and a plastic crushed material as auxiliary fuels wherein the net calorific value of the pulverized coal is 5,000-8,000 kcal/kg, the net calorific value of the wood crushed material is 2,500-5,000 kcal/kg and the net calorific value of the plastic crushed material is 5,000-13,000 kcal/kg. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】 [0001]
【発明の属する技術分野】本発明は、微粉炭を主燃料とし、木材粉砕物とプラスチック粉砕物を補助燃料として使用するセメントクリンカーの焼成工程における可燃性燃料の燃焼性改良方法に関するものである。 The present invention relates to the pulverized coal as a main fuel, it relates to a combustion improving method of combustible fuel in the cement clinker burning step of using wood pulverized material and plastic pulverized product as a supplemental fuel.
【0002】 [0002]
【従来の技術】近年、廃棄物に関する諸規制が強化されたことに伴い、プラスチック、木材等の可燃性廃棄物に関してはダイオキシン問題等があるため、一般焼却炉での処理が困難となってきている。 In recent years, due to various regulations on waste has been reinforced, plastic, for respect to the combustible waste such as wood and the like dioxin problem, the process of a general incinerator is becoming difficult there. このような状況下、循環型社会への転換を図るため、これら可燃性廃棄物をセメントクリンカー製造用燃料として使用する機会が増加している。 Under such circumstances, in order to shift to a recycling society, the opportunity to use these combustible wastes as cement clinker production for fuel has increased.
セメントクリンカー製造用燃料として一般に用いられている微粉炭の代替としてプラスチック廃材をクリンカー焼成燃料として使用する方法に関し、各種技術が開示されている。 A method of using plastic waste as clinker firing fuel as an alternative to the pulverized coal is generally used as a cement clinker manufacturing fuel, various techniques have been disclosed.
例えば、特許文献1には、プラスチック廃材をキルン窯前に設けたノズルから吹込み、キルン内の可能な限り窯尻部分まで到達させクリンカー上で着地燃焼させることによりクリンカー焼成工程を最終的に酸化雰囲気下で行うようにし、クリンカーの品質を損なわないように製造する方法が開示されている。 For example, Patent Document 1, blow plastic waste from a nozzle provided in front kiln kiln, ultimately oxidized clinker burning step by land burned on clinker allowed to reach kiln inlet part as possible in the kiln to perform in an atmosphere, a method of manufacturing so as not to impair the quality of the clinker is disclosed.
また、特許文献2、3には、プラスチック廃材を微粉化し、キルン窯前ノズルから吹き出し速度を調整することにより空中燃焼させ、クリンカーが還元雰囲気で焼成されないようにする方法が開示されている。 Further, Patent Documents 2 and 3, the plastic waste is pulverized, then the air combustion by adjusting the rate discharged from the kiln kiln before the nozzle, clinker method to not be fired in a reducing atmosphere is disclosed.
【0003】 [0003]
【特許文献1】 [Patent Document 1]
特許第2905689号公報(請求項1、図1) Japanese Patent No. 2905689 (claim 1, Fig. 1)
【特許文献2】 [Patent Document 2]
特開2000−169197号公報(請求項1) JP 2000-169197 JP (claim 1)
【特許文献3】 [Patent Document 3]
特開2001−206746号公報(請求項1) JP 2001-206746 JP (claim 1)
【0004】 [0004]
【発明が解決しようとする課題】 [Problems that the Invention is to Solve
上に述べた特許文献1乃至3には、プラスチック廃材に関する記載はあるが、木材廃棄物の具体的燃焼方法に関しては言及されてはいない。 Patent Documents 1 to 3 mentioned above, although description about the plastic waste, is not mentioned in connection with specific combustion method of the wood waste. 例えば、本発明者らが、木材廃棄物を特許文献3の粒度に粉砕し、大量にキルン窯前から補助燃料として吹込みクリンカー焼成を行うと、微粉炭単独で使用する場合に比べ燃焼ガス温度が低下し、クリンカーの焼成が十分に行われないという問題が発生した。 For example, the present inventors have, wood waste was ground to a particle size of Patent Document 3, when the blow clinker fired in large quantities as an auxiliary fuel before kiln kiln, the combustion gas temperature compared to when using pulverized coal alone There was lowered, a problem that firing of the clinker can not be performed sufficiently occurs.
一方、プラスチック廃材についても、特許文献3の粒度で粉砕し、大量にキルン窯前から補助燃料として吹込みクリンカー焼成を行うと、木材廃棄物の場合とは異なった問題が発生した。 On the other hand, for the plastic waste, triturated with granularity of Patent Document 3, when the blow clinker fired in large quantities as an auxiliary fuel before kiln kiln, different concerns than wood waste is generated. すなわち、微粉炭単独で焼成した場合に比べ、燃焼ガス温度が上昇し、そのため、キルンレンガの損傷が発生した。 That is, compared with the case of firing in pulverized coal alone, the combustion gas temperature rises and therefore, damage to the Kirunrenga occurs. また、プラスチック廃材のロットの違いによる品質変動が大きいため、燃焼ガス温度の変動も大きなものとなり焼成温度の制御が難しいという問題が発生した。 Further, since the quality variation due to lots of plastic waste difference is large, a problem that it is difficult to control the sintering temperature becomes large fluctuation of the combustion gas temperature occurs.
本発明は、微粉炭に代えて木材やプラスチック等の可燃性廃棄物を補助燃料として使用した場合に発生する上記問題、すなわち、燃焼ガス温度の上昇、低下あるいは変動を抑制し、更には、キルンレンガの損傷が防止された燃焼性改良方法の提供を課題とする。 The present invention, the problems in place of the pulverized coal occur when using a flammable waste such as wood or plastics as an auxiliary fuel, i.e., increase the combustion gas temperature, a decrease or fluctuation suppressing, furthermore, Kirunrenga damage to an object of the invention to provide a preventing combustion improving methods.
【0005】 [0005]
【課題を解決するための手段】本発明者らは、主燃料と補助燃料の真発熱量がある範囲内に在るものを組合わせて使用する方法が、前記課題を解決した方法となることを見出し本発明を完成した。 Means for Solving the Problems The present inventors found that a method of using a combination of those located within a certain range net calorific value of the main fuel and auxiliary fuel, a method which solves the problems the heading and have completed the present invention.
【0006】すなわち、本発明は、真発熱量が5000〜8000kcal/kgの微粉炭を主燃料とし、真発熱量が2500〜5000kcal/kgの木材粉砕物および真発熱量が5000〜13000kcal/kgのプラスチック粉砕物を補助燃料として使用し、該微粉炭、木材粉砕物、プラスチック粉砕物の単位時間当たりの燃料使用量を夫々X、Y及びZ(何れもトン/時間単位)とした場合、各々の関係が、Y+Z≦X、かつ、0.7≦Y/Z≦2.2であることを特徴とする、可燃性燃料の燃焼性改良方法に関するものである。 Namely, the present invention is the true calorific value of the pulverized coal 5000~8000kcal / kg as the main fuel, the true calorific value of wood pulverized and net calorific value of 2500~5000kcal / kg of 5000~13000kcal / kg plastic pulverized product was used as an auxiliary fuel, the fine coal, wood pulverized product per unit time of the plastic pulverized fuel consumption respectively X, when the Y and Z (either tons / hours), each of relationship, Y + Z ≦ X and characterized in that it is a 0.7 ≦ Y / Z ≦ 2.2, it relates to a combustion improving method of combustible fuel.
【0007】 [0007]
【発明の実施の形態】以下に本発明を詳細に説明する。 DETAILED DESCRIPTION OF THE INVENTION The present invention is described in detail below. なお、この実施の形態は発明の趣旨をより良く理解させるため具体的に説明するものであり、特に指定のない限り、発明内容を特定するものではない。 Incidentally, this embodiment is intended to explain the purpose of the invention better specifically in order to understand, unless otherwise specified, it is not intended to specify the invention contents.
【0008】本発明では、微粉炭を主燃料、木材粉砕物とプラスチック粉砕物を補助燃料としてロータリーキルンでセメント原料調合物を焼成し、セメントクリンカーを得る。 [0008] In the present invention, a pulverized coal main fuel, firing the cement raw material formulation in a rotary kiln wood pulverized material and plastic pulverized product as a supplemental fuel, to obtain cement clinker.
主燃料である微粉炭は、一般にセメントクリンカー焼成用に用いられている石炭粉砕物であれば特に限定されない。 Pulverized coal is the main fuel is not particularly limited as long as it generally coal pulverized material used for cement clinker firing.
補助燃料に用いる木材粉砕物は、森林の木材伐採物や、木材加工業者で発生する木材加工チップ、木屑、建築現場で発生する木屑などを粉砕した木材破砕物であり、木材であれば、その種類が杉、桧、赤松、ぶな、ベイスギ、ベイマツ、ベイツガ、ラワン、エゾまつ、とど松など、いずれのものであっても良い。 Crushed wood was used for the auxiliary fuel, and timber of forests, wood processing chips generated by wood processing companies, wood chips, and wood crushed with such a grinding wood chips generated at a building site, if wood, its types of cedar, cypress, pine, beech, red cedar, Douglas fir, hemlock, lauan, Ezo pine, such as sea lions pine, may be any of those.
また、プラスチック粉砕物は、ポリエチレン、ポリプロピレン、ポリスチレンなどの破砕物であり、固形樹脂の粉砕物であれば原料種を問わない。 Further, the plastic ground material is crushed such as polyethylene, polypropylene, polystyrene, regardless raw material species if pulverized solid resin.
【0009】これら燃料の真発熱量は、JIS M 8814「石炭及びコークス類の発熱量測定方法」に従い測定されるもので、一般的には、低位発熱量若しくは低発熱量ともいわれる。 [0009] net calorific value of the fuel is intended to be measured in accordance with JIS M 8814 "calorific value measuring method of the coal and coke", in general, also referred to as lower heating value or lower heating value.
例えば、主燃料である微粉炭は、同発熱量が5000〜8000kcal/kgのものを使用するが、6000〜7000kcal/kgのものの使用が好ましい。 For example, pulverized coal is the main fuel is the calorific value uses those 5000~8000kcal / kg, preferably using those of 6000~7000kcal / kg. 木材粉砕物は、同発熱量が2500〜5000kcal/kgのものを使用するが、3000〜4000kcal/kgのものの使用が好ましい。 Crushed wood material is the heat value to use those 2500~5000kcal / kg, preferably using those of 3000~4000kcal / kg. 更に、プラスチック粉砕物は、同発熱量が5000〜13000kcal/kgのものを使用するが、7000〜12000kcal/kgのものの使用が好ましい。 Furthermore, the plastic ground material is the amount of heat generated using those 5000~13000kcal / kg, preferably using those of 7000~12000kcal / kg.
発熱量がこれら真発熱量の範囲を超えると、微粉炭に関しては、主燃料であるので燃焼ガス温度、着火性に多大なる悪影響を及ぼし、木材粉砕物、プラスチック粉砕物に関しては、燃焼ガス温度、燃焼安定性に悪影響を及ぼす。 When the heat generation amount exceeds the range of net calorific value, for the pulverized coal, because it is the main fuel combustion gas temperature, they have a tremendous negative effect on the ignitability, wood pulverized product, with respect to the plastic ground material, the combustion gas temperature, adversely affect the combustion stability.
【0010】また、これら燃料の使用量は、単位時間当たりの各々の燃料使用量を、微粉炭をX(トン/時間)、木材粉砕物をY(トン/時間)、プラスチック粉砕物をZ(トン/時間)とした場合、各々の関係が、Y+Z≦X、かつ、0.7≦Y/Z≦2.2であることが好ましい。 [0010] The amount of these fuels, each of the fuel consumption per unit time, the pulverized coal X (tonnes / hour), a crushed wood product Y (tons / hour), the plastic ground material Z ( If the tons / hour), each relationship, Y + Z ≦ X, and is preferably 0.7 ≦ Y / Z ≦ 2.2. これらの関係は、実験データに基づいて、適正領域の区分を近似式で示したものである。 These relationships are based on experimental data, showing the division of the proper area in approximation.
X<Y+Zの領域では、微粉炭単独使用の場合に比べ燃焼ガスのフレーム形成が不充分となる。 X <In the region of Y + Z, the frame forming a combustion gas compared with the case of pulverized coal alone is insufficient. また、燃焼ガス温度の変動も大きくなる。 Moreover, the larger variation in combustion gas temperature.
また、Y/Z<0.7では、燃焼ガス温度が上昇し過ぎ、2.2<Y/Zでは、逆に燃焼ガス温度が低下し過ぎる。 Further, the Y / Z <0.7, too combustion gas temperature rises, the 2.2 <Y / Z, the combustion gas temperature is too low reversed.
これらの式が燃焼ガス温度と関係する理由は明確でないが以下の理由によるものと推察している。 These expressions reasons associated with the combustion gas temperature is not clear is presumed to be due to the following reasons.
すなわち、各燃料の燃焼速度が同一と仮定した場合、真発熱量で比較すると、木材<微粉炭<プラスチックの関係にあること、また、燃焼時の発生ガス量を比較すると、木材<微粉炭<プラスチックの関係にあること、更には、真発熱量当たりの発生ガス量が、プラスチック<微粉炭<木材の関係にあることが原因であると推察している。 That is, when the combustion rate of the fuel is assumed to equal, when compared with the true calorific value, it is in the timber <pulverized coal <plastic relation, also, a comparison of amount of gas generated during combustion, wood <pulverized coal < relation that plastic, furthermore, the generated gas amount per net calorific value has been speculated that it is due to the fact that a relationship of plastic <pulverized coal <wood. つまり、真発熱量当たりの発生ガス量により、実際の燃焼ガス最高温度がおおよそ決まり、この値が小さい程、燃焼ガス温度が高くなると考えられ、従って、これら特性の異なる燃料をうまく組み合わせることにより燃焼特性を改良することが本発明の主目的である。 That combustion, the amount of gas generated per net calorific value, determines the actual combustion gas maximum temperature approximately is, smaller the value, considered to combustion gas temperature becomes higher, therefore, by combining different fuels of these characteristics well it is the main object of the present invention to improve the properties.
【0011】また、これら木材粉砕物とプラスチック粉砕物の形状は、微粉炭と燃焼速度が同一になるように調整することが必要である。 [0011] The shape of crushed wood material and plastic pulverized product, it is necessary that the pulverized coal and the burning rate is adjusted to be the same. 粉砕物の形状は、長さ、幅、厚みの3つ方向の長さで特定されるが、その中でも特に、最短長を示す厚み方向の長さが燃焼速度に影響を及ぼす。 The shape of pulverized material, length, width, but is specified by three length of the thickness, and especially the length in the thickness direction indicating the minimum length affects the combustion speed. 具体的には、粉砕物の最短方向である厚み方向の平均長が0.2〜2.0mmであることが好ましい。 Specifically, it is preferable that the average length in the thickness direction is the shortest direction of pulverized material is 0.2 to 2.0 mm. 厚み方向の平均長が2.0mmを超えると、燃焼速度が遅くなり、未燃焼物が発生する可能性がある。 When the average length in the thickness direction is more than 2.0 mm, the combustion speed is slower, there is a possibility that unburnt matter occurs. また、0.2mm未満では、微粉炭単独燃焼の場合に比べ、燃焼速度が早くなりすぎるだけでなく、粉砕に過大なエネルギーが必要となる。 Further, it is less than 0.2 mm, compared with the case of pulverized coal alone combustion, not only burn rate too fast, it is necessary to excessive energy milling.
なお、厚み方向の平均長の測定は、粉砕物をJIS Z 8801で規定する9.52mmの標準網篩でふるった場合の、篩通過分が90%以上になるまで粉砕した場合の篩通過分を測定用試料とし、そのうち、任意に抽出した試料100点程度の厚み方向の長さを計測し、単純平均することにより求める。 The measurement of the average length in the thickness direction, when the pulverized product was sieved with standard mesh sieve of 9.52mm specified in JIS Z 8801, a sieve passage component when the sieve passing fraction was ground to 90% It was a measurement sample of which measures the length of the thickness direction of about arbitrarily extracted sample 100 points, determined by simple average.
【0012】以下では、セメントクリンカーの製造工程におけるこれら可燃性燃料の燃焼方法に関して具体例を示し、本発明を更に詳細に説明する。 [0012] In the following, a specific example with respect to the combustion process of combustible fuel in the cement clinker production process, a more detailed description of the present invention.
図1は、一般的に用いられているセメントキルンの一例であるが、先ず本図をを用いて、セメントクリンカー焼成工程を説明する。 Figure 1 is an example of a cement kiln which is generally used, first with reference to this figure, illustrating the cement clinker burning step.
セメント原料は、サスペンションプレヒーターのサイクロン3bの最上段入り口3aから供給され、下段から排出されるガスと熱交換を行いながら仮焼炉3c、インレットフッド3eを経てキルン1へと供給される。 Cement material is fed from the uppermost entrance 3a of the cyclone 3b of the suspension preheater, while gas and heat exchange is discharged from the lower stage calcining furnace 3c, and supplied to the kiln 1 through the inlet hood 3e. セメント原料は、キルン内部を窯尻5から窯前4へ移動し、更に熱交換を行いながら焼成が進む。 Cement raw materials, to move inside the kiln from the kiln inlet 5 to the kiln before 4, sintering proceeds while further subjected to heat exchange. 焼成されたクリンカーは2のクリンカークーラーで急冷される。 Calcined clinker is quenched with 2 of clinker cooler.
【0013】主燃料の微粉炭は主燃料用ホッパー9aからロータリーバルブ10aを経由し、コンプレッサー11aの圧縮空気と共に、主燃料バーナー7aから吹き込まれ、キルン1内でフレーム8を形成して燃焼する。 [0013] via the rotary valve 10a pulverized coal main fuel from the main fuel hopper 9a, together with the compressed air in the compressor 11a, it is blown from the main fuel burners 7a, burns to form a frame 8 within kiln 1. 木材粉砕物及びプラスチック粉砕物は、夫々、ホッパー9b、9cからロータリーバルブ10b、10cを経由し、コンプレッサー11b、11cの圧縮空気と共に、主燃料バーナー7aの上部に設けた補助燃料吹込み口7b、7cからキルン内に吹込み、キルン内の高温雰囲気に曝されることにより燃焼する。 Crushed wood product and plastic pulverized product, respectively, hopper 9b, the rotary valve 10b from 9c, via 10c, a compressor 11b, 11c together with the compressed air, is provided over the main fuel burners 7a auxiliary fuel blowing port 7b, blown into the kiln from 7c, burning by exposure to a high temperature atmosphere in the kiln. これら補助燃料は、明確なフレームを形成するのではなく、主燃料のフレーム8に取り込まれる形で燃焼するか、あるいは、燃焼粒子毎に着火しキルン内を浮遊燃焼する。 These auxiliary fuel, rather than forming a distinct frame, or burned in a form that is incorporated into the frame 8 of the main fuel, or ignited every burning particles suspended combustion of the kiln.
このため、補助燃料吹込み口7b、7cは、主燃料バーナー7aの上部に設けてあれば良く、2本の吹込み口を使用し吹き込んでも良いが、補助燃料吹込み口を1本とし、そこから、木材粉砕物及びプラスチック粉砕物の混合物を吹き込んでも良い。 Therefore, the auxiliary fuel blowing port 7b, 7c may be provided over the upper portion of the main fuel burners 7a, it may be blown using two blowing port, but the auxiliary fuel blowing port and one, from there, it may be blown mixtures of crushed wood material and plastic pulverized product.
【0014】主燃料の微粉炭及び補助燃料の木材粉砕物及びプラスチック粉砕物は、オートサンプラー12a、12b、12cで定期的に抜き出し、その真発熱量を測定する。 [0014] Wood pulverized and plastic pulverized pulverized coal and the auxiliary fuel of the main fuel, autosampler 12a, 12b, periodically withdrawn at 12c, to measure the net calorific value. また、キルン内の燃焼ガス温度は、補助燃料バーナー上部に設けた遠距離温度計13で測定される。 Further, the combustion gas temperature in the kiln is measured in the far thermometer 13 provided in the auxiliary fuel burner top.
【0015】 [0015]
【実施例】木材粉砕物として杉、プラスチック粉砕物としてはポリプロピレンを粉砕したものを補助燃料として使用し、セメントクリンカーの焼成を行った場合の例を示す。 EXAMPLES cedar as wood pulverized, as the plastic pulverized product was used after pulverized polypropylene as auxiliary fuel, an example in the case of performing calcination of the cement clinker.
表1に、主燃料及び補助燃料に用いた微粉炭及び木材粉砕物及びプラスチック粉砕物の特性を示す。 Table 1 shows the characteristics of the pulverized coal and wood pulverized and plastic ground material used in the main fuel and auxiliary fuel. これら特性は、JIS M 8812「石炭類及びコークス類工業分析法」、JIS M 8813「石炭類及びコークス類元素分析法」、及びJIS M 8814「石炭類及びコークス類発熱量測定方法」に従って分析した結果である。 These properties, JIS M 8812 "coals and coke industry analysis", JIS M 8813 "coals and coke elemental analysis", and were analyzed according to JIS M 8814 "coals and coke calorific value measuring method" it is the result.
これら燃料を用い、上述した方法でセメントクリンカーの焼成を行った。 Using these fuels, it was fired cement clinker in the manner described above. 結果を表2に示す。 The results are shown in Table 2. なお、キルン内の燃焼ガス温度測定には、遠距離温度計(横河M&C(株)製PM173)を使用した。 Incidentally, the combustion gas temperature measurements in the kiln was used far thermometer (Yokogawa M & C (KK) PM173).
【0016】 [0016]
【発明の効果】以上述べたように、本発明によれば、セメント原料をロータリーキルンで焼成する際に、微粉炭を主燃料とし、木材粉砕物とプラスチック粉砕物を補助燃料として使用し、それらの単位時間当たりの使用量を決め、これら燃焼特性の異なる燃料をうまく組み合わせることによりキルンの燃焼特性を改良し、燃焼ガス温度の上昇,低下、あるいは変動を防ぎ、またキルンレンガの損傷を防ぎ、更には品質の安定したクリンカーを生産することが可能となる。 As described above, according to the present invention, according to the present invention, when firing the cement material in the rotary kiln, a pulverized coal as a main fuel, using a wood pulverized material and plastic pulverized product as a supplemental fuel, their determine the amount per unit time, the combustion characteristics of the kiln was improved by skillfully combining different fuels of these burn characteristics, increase the combustion gas temperature, decrease, or prevent variation, also prevent damage to the Kirunrenga, more it is possible to produce a stable clinker quality.
【0017】 [0017]
【表1】 [Table 1]
【0018】 [0018]
【表2】 [Table 2]

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS
【図1】本発明の方法が実施されるセメントクリンカー焼成装置の構造を示す図である。 1 is a diagram showing a structure of a cement clinker sintering apparatus in which the method is implemented in the present invention.
【符号の説明】 DESCRIPTION OF SYMBOLS
1 キルン2 クーラー3 サスペンションプレヒーター3a SPファン最上段入り口3b サイクロン3c 仮焼炉3d ライジングダクト3e インレットフッド4 窯前5 窯尻6 SPファン7a 主燃料バーナー7b、7c 補助燃料吹込口8 主燃料のバーナーフレーム9a 主燃料用ホッパー9b、9c 補助燃料用ホッパー10a 主燃料用ロータリーバルブ10b、10c 補助燃料用ロータリーバルブ11a 主燃料用コンプレッサー11b、11c 補助燃料用コンプレッサー12a 主燃料用オートサンプラー12b、12c 補助燃料用オートサンプラー 1 kiln 2 cooler 3 suspension preheater 3a SP fan uppermost inlet 3b cyclone 3c calciner 3d rising duct 3e inlet Hood 4 kiln before 5 kiln inlet 6 SP fan 7a main fuel burners 7b, the 7c auxiliary fuel blowing port 8 main fuel burner frame 9a main fuel hopper 9b, 9c auxiliary fuel hopper 10a main fuel for rotary valves 10b, 10c auxiliary fuel for rotary valves 11a main fuel compressors 11b, 11c auxiliary fuel compressors 12a main fuel autosampler 12b, 12c auxiliary autosampler for fuel

Claims (3)

  1. 真発熱量が5000〜8000kcal/kgの微粉炭を主燃料とし、真発熱量が2500〜5000kcal/kgの木材粉砕物および真発熱量が5000〜13000kcal/kgのプラスチック粉砕物を補助燃料として使用し、該微粉炭、木材粉砕物、プラスチック粉砕物の単位時間当たりの燃料使用量を夫々X、Y及びZ(何れもトン/時間単位)とした場合、各々の関係が、Y+Z≦X、かつ、0.7≦Y/Z≦2.2であることを特徴とする、セメントクリンカーの焼成工程における可燃性燃料の燃焼性改良方法。 Net calorific value is a pulverized coal 5000~8000kcal / kg as the main fuel, wood pulverized and net calorific value of the true calorific value 2500~5000kcal / kg is used plastic pulverized 5000~13000kcal / kg as auxiliary fuel , fine coal, wood pulverized product, when the fuel consumption per unit of plastic ground material time each X, and Y and Z (either tons / hours), each relationship, Y + Z ≦ X and, characterized in that it is a 0.7 ≦ Y / Z ≦ 2.2, combustion improving method of combustible fuel in the cement clinker burning step.
  2. 木材粉砕物とプラスチック粉砕物の厚み方向の平均長が0.2〜2.0mmであることを特徴とする、請求項1に記載のセメントクリンカーの焼成工程における可燃性燃料の燃焼性改良方法。 Wherein the average length in the thickness direction of the wood crushed product and the plastic granulated material is 0.2 to 2.0 mm, a combustion improving method of the combustible fuel in cement clinker firing process according to claim 1.
  3. 微粉炭燃焼バーナーの上部に設けた補助燃料吹き込み管から、木材粉砕物とプラスチック粉砕物を供給することを特徴とする、請求項1又は2に記載のセメントクリンカーの焼成工程における可燃性燃料の燃焼性改良方法。 An auxiliary fuel inlet tube provided in the upper portion of the pulverized coal combustion burner, and supplying the crushed wood material and plastic pulverized product, the combustion of the combustible fuel in cement clinker firing process according to claim 1 or 2 sex improved method.
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