JPH0139035B2 - - Google Patents
Info
- Publication number
- JPH0139035B2 JPH0139035B2 JP821582A JP821582A JPH0139035B2 JP H0139035 B2 JPH0139035 B2 JP H0139035B2 JP 821582 A JP821582 A JP 821582A JP 821582 A JP821582 A JP 821582A JP H0139035 B2 JPH0139035 B2 JP H0139035B2
- Authority
- JP
- Japan
- Prior art keywords
- heating cylinder
- rotary kiln
- combustion chamber
- hole
- cylindrical body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000010438 heat treatment Methods 0.000 claims description 84
- 238000002485 combustion reaction Methods 0.000 claims description 44
- 239000007789 gas Substances 0.000 claims description 20
- 239000000567 combustion gas Substances 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 10
- 239000000126 substance Substances 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 239000002699 waste material Substances 0.000 description 23
- 239000002994 raw material Substances 0.000 description 16
- 239000002689 soil Substances 0.000 description 11
- 239000000446 fuel Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000002440 industrial waste Substances 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 235000019198 oils Nutrition 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 239000011449 brick Substances 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 235000019774 Rice Bran oil Nutrition 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 235000019645 odor Nutrition 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000008165 rice bran oil Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Incineration Of Waste (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
Description
【発明の詳細な説明】
この発明はロータリーキルンに関するものであ
つて、更に詳細には可燃性物質を混有する廃棄
物をロータリーキルンの加熱筒中で焼却するに際
し廃棄物から発生する可燃性ガス燃焼室中へ噴出
自燃させて焼却用燃料を節減したり、原料を加
熱筒中で加熱処理するにあたり燃焼室中の高温燃
焼ガスを加熱筒中に導入して加熱処理を促進する
ことのできるロータリーキルンに関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotary kiln, and more specifically, when waste mixed with flammable substances is incinerated in the heating cylinder of the rotary kiln, flammable gas generated from the waste is discharged into the combustion chamber. The present invention relates to a rotary kiln that can save incineration fuel by ejecting and self-combust, and can accelerate heat treatment by introducing high temperature combustion gas in a combustion chamber into a heating cylinder when heating raw materials in a heating cylinder.
近年、産業廃棄物の飛躍的増加に伴い、この種
廃棄物の効率的な処理対策が、環境汚染防止との
関係において種々講じられている。これら産業廃
棄物の中でも、特に油を含浸した廃土のように可
燃性物質を混有している物質については、通常そ
のままの状態で焼却炉中に投入しても良好に燃焼
し難いため、一般に埋立地へ運搬して投棄処理し
ているのが現状である。しかし、この埋立処理
は、高額の投棄料の支出を要し、また油分が地中
に浸透して地下水汚染の二次公害を生じたり、悪
臭の原因になる等、周囲環境に大きな悪影響を及
ぼすことが懸念される。また、バーナ等で火炎を
照射して、強制的に廃棄物の焼却を図る手段もあ
るが、燃料費が大幅に嵩む難点がある。 In recent years, with the dramatic increase in industrial waste, various measures have been taken to efficiently treat this type of waste in relation to the prevention of environmental pollution. Among these industrial wastes, materials that contain flammable substances, such as oil-impregnated waste soil, are difficult to burn properly even if they are put into an incinerator as is. Currently, waste is generally transported to a landfill and disposed of. However, this landfill treatment requires the expenditure of large dumping fees, and also has a significant negative impact on the surrounding environment, such as oil seeping into the ground and causing secondary pollution of groundwater contamination and causing bad odors. This is a concern. Another method is to forcefully incinerate the waste by irradiating it with flame using a burner, but this method has the drawback of significantly increasing fuel costs.
更に、原料物質をロータリーキルンで加熱処理
するに際し、次のような欠点が指摘される。すな
わち、燃焼室中に加熱筒を回転自在に貫通配置
し、該加熱筒の一端から投入された原料を加熱筒
の回転により他端へ移送しつつ撹拌加熱するロー
タリーキルンでは、加熱筒を介して原料を間接的
に均一加熱することができ、またバーナからの燃
焼ガスが原料に直接触れないため、加熱筒中で微
粉が飛散する惧れもないものである。しかし、熱
効率の見地からは、加熱筒からの伝導熱だけで原
料の加熱を行うものであるので、熱効率は低いも
のとなつている。そこで、効率を上げるために燃
焼室から排出された燃焼排ガスを煙道を介してフ
アンにより加熱筒中に送給する手段も採られてい
るが、燃焼室から一旦取出した燃焼排ガスは温度
がかなり低下し、余り効率の増加は期待し得なか
つた。 Furthermore, the following drawbacks have been pointed out when heat treating raw materials in a rotary kiln. In other words, in a rotary kiln, a heating cylinder is rotatably arranged through the combustion chamber, and the raw material introduced from one end of the heating cylinder is stirred and heated while being transferred to the other end by the rotation of the heating cylinder. can be heated indirectly and uniformly, and since the combustion gas from the burner does not come into direct contact with the raw material, there is no risk of fine powder scattering in the heating cylinder. However, from the standpoint of thermal efficiency, the raw material is heated only by conductive heat from the heating cylinder, so the thermal efficiency is low. Therefore, in order to increase efficiency, a method has been adopted in which the flue gas discharged from the combustion chamber is sent into the heating cylinder via a flue by a fan, but once the flue gas is taken out from the combustion chamber, the temperature drops considerably. However, no significant increase in efficiency could be expected.
本発明は、このような諸搬の事情に鑑み案出さ
れたものであつて、この種産業廃棄物、殊に、可
燃性物質を混有しており、かつ加熱により可燃性
ガスを発生する廃棄物を焼却する際の省エネルギ
ーを図ると共に、完全燃焼させて２次公害を誘発
することのないロータリーキルンを提供すること
を目的とする。 The present invention has been devised in view of these various transportation circumstances, and is intended to deal with industrial waste of this type, especially those that contain flammable substances and generate flammable gas when heated. It is an object of the present invention to provide a rotary kiln that saves energy when incinerating waste, and that does not cause secondary pollution through complete combustion.
また、原料を加熱処理するにあたり、加熱筒の
単なる間接加熱のみによらず、燃焼ガスの導入に
より熱効率を向上させることを目的とする。 Another object of the present invention is to improve the thermal efficiency by introducing combustion gas in addition to simply indirect heating of the heating cylinder when heat-treating raw materials.
この目的を達成するため、本発明では、燃焼室
中に加熱筒を回転自在に貫通配置し、前記加熱筒
の一端から投入された被処理物を外加熱筒の回転
により他端へ移送しつつ撹拌して加熱焼却するロ
ータリーキルンにおいて、加熱筒周壁の適宜位置
に適当数の通孔を穿設することを特徴とする。 In order to achieve this object, in the present invention, a heating cylinder is rotatably arranged penetrating through the combustion chamber, and the object to be processed, which is introduced from one end of the heating cylinder, is transferred to the other end by rotation of the external heating cylinder. A rotary kiln that heats and incinerates while stirring is characterized by having an appropriate number of holes bored at appropriate positions on the peripheral wall of the heating cylinder.
このとき、加熱筒中に投入される被処理物が可
燃性物質を混有する廃棄物の場合は、加熱撹拌に
より廃棄物から発生する可燃性ガスを前記貫通孔
を介して燃焼室中に噴出し得るように構成され
る。 At this time, if the material to be treated that is thrown into the heating cylinder is waste containing flammable substances, flammable gas generated from the waste by heating and stirring may be blown into the combustion chamber through the through hole. It is configured as follows.
また、燃焼室中で発生する高温燃焼ガスを前記
貫通孔を介して加熱筒内に導入し得るよう構成さ
れる。 Further, it is configured such that high-temperature combustion gas generated in the combustion chamber can be introduced into the heating cylinder through the through hole.
この場合、前記通孔には所定メツシユの金網を
張設して、加熱筒内の被処理物が前記通孔を介し
て燃焼室中へ落下するのを防止するようにしてお
くのが好適である。また同様の被処理物落下防止
対策として、前記通孔に加熱筒の略中心方向に向
けて筒体を突設するのも有効である。更に、前記
通孔に加熱筒の略中心方向に指向する筒体を突設
し、この筒体の開口部に所定メツシユの金網を張
設するようにすれば、一層効果的である。 In this case, it is preferable that a wire gauze of a predetermined mesh is placed over the through hole to prevent the material to be processed in the heating cylinder from falling into the combustion chamber through the through hole. be. Furthermore, as a similar measure to prevent objects from falling, it is also effective to provide a cylindrical body protruding from the through hole toward the approximate center of the heating cylinder. Furthermore, it is even more effective if a cylindrical body extending toward the center of the heating cylinder is provided in the through hole, and a wire gauze of a predetermined mesh is stretched over the opening of the cylindrical body.
更に、前記筒体はその先端を屈曲させ、筒体開
口部が加熱筒の被処理物供給側に指向するよう構
成すれば好適である。 Furthermore, it is preferable that the cylindrical body is configured such that its tip is bent so that the opening of the cylindrical body is directed toward the processing object supply side of the heating cylinder.
なお、本発明に係るロータリーキルンでは、後
に詳述するように加熱筒内に投じられた物質が加
熱されるに従つて発生する可燃性ガスを、前記通
孔を介して燃焼室中へ吹出させて自燃させるもの
であるから、そのガス噴出位置近傍に外部空気が
供給されるようになつていれば、一層効率的な燃
焼促進が図られるものである。従つて、燃焼室の
壁部に、前記加熱筒の通孔穿設位置と略対応的に
所定数の外部空気供給孔を穿設するのが好まし
い。 In addition, in the rotary kiln according to the present invention, as will be described in detail later, flammable gas generated as the substance thrown into the heating cylinder is heated is blown out into the combustion chamber through the through hole. Since the gas is self-combusting, if external air is supplied near the gas ejection position, more efficient combustion can be promoted. Therefore, it is preferable that a predetermined number of external air supply holes be bored in the wall of the combustion chamber, substantially corresponding to the positions of the holes in the heating cylinder.
また、前記通孔から可燃性ガスを燃焼室に向け
て噴射させるには、加熱筒内を加圧するのが好ま
しく、この目的のため、及び併せて加熱筒内にお
ける被処理物の酸化焼却を促進させる目的のた
め、加熱筒の焼却残渣排出側に空気供給管を臨ま
せるよう構成する。 In addition, in order to inject the flammable gas from the through hole toward the combustion chamber, it is preferable to pressurize the inside of the heating cylinder. For this purpose, the air supply pipe is configured to face the incineration residue discharge side of the heating cylinder.
このように構成することにより、可燃性物質を
混有する廃棄物の完全燃焼、及び焼却に要する外
部燃料の大幅節減による省エネルギーが効果的に
達成される。 With this configuration, it is possible to effectively achieve complete combustion of waste containing combustible substances and energy saving by significantly reducing external fuel required for incineration.
次に、本発明に係るロータリーキルンについ
て、好適な実施例を挙げて添付図面を参照しなが
ら、以下詳細に説明する。 Next, the rotary kiln according to the present invention will be described in detail below by giving preferred embodiments and referring to the accompanying drawings.
第１図は本発明に係るロータリーキルンの一実
施例の概略構成を示す縦断面図であつて、参照符
号１０はキルン本体を構成する燃焼室を示す。こ
の燃焼室１０は、壁部を耐熱性れんがで築造さ
れ、燃焼室１０内の長手方向に、円筒状の加熱筒
１２が回転自在に貫通配置されている。前記加熱
筒１２は、燃焼室１０を貫通して突出する両端部
外周にリング１４が夫々固定され、燃焼室外部に
設けた基台１６の頂部に配設した各１対のローラ
１８上に前記リング１４を当接させることによ
り、回転自在に支持される。また、加熱筒１２の
一方の端部には、被処理物投入用のホツパ２０と
連通する被処理物供給筒２２が挿通されて加熱筒
１２内に臨み、他方の端部には、被処理物排出筒
２４が接続されている。前記供給筒２２中には、
被処理物を加熱筒１２中へ強制移送するためのス
クリユーコンベア２６を回転自在に挿通配置し、
また加熱筒１２は図示のように被処理物投入側か
ら被処理物排出側へ向けて下降するよう、若干の
緩傾斜を付しておくのが好ましい。なお、図示し
ないが、前記加熱筒１２は、その外周に設けたギ
ヤリングと駆動源に接続するピニオンとの噛合、
その他チエン等の適宜の動力伝達手段により緩や
かに回転するようになつていることは勿論であ
る。 FIG. 1 is a vertical cross-sectional view showing a schematic configuration of an embodiment of a rotary kiln according to the present invention, and reference numeral 10 indicates a combustion chamber constituting a main body of the kiln. The combustion chamber 10 has a wall made of heat-resistant brick, and a cylindrical heating cylinder 12 is rotatably disposed through the combustion chamber 10 in the longitudinal direction thereof. The heating cylinder 12 has rings 14 fixed to the outer periphery of both ends protruding through the combustion chamber 10, and the heating cylinder 12 is mounted on each pair of rollers 18 disposed on the top of a base 16 provided outside the combustion chamber. By abutting the ring 14, it is rotatably supported. Further, a workpiece supply cylinder 22 that communicates with a hopper 20 for feeding the workpiece is inserted into one end of the heating cylinder 12 and faces into the heating cylinder 12, and a workpiece supply cylinder 22 is inserted into the heating cylinder 12 at the other end. A material discharge tube 24 is connected. In the supply cylinder 22,
A screw conveyor 26 for forcibly transferring the object to be processed into the heating cylinder 12 is rotatably inserted and arranged,
Further, it is preferable that the heating cylinder 12 be sloped slightly so that it descends from the processing object input side to the processing object discharge side as shown in the figure. Although not shown, the heating cylinder 12 is engaged with a gear ring provided on its outer periphery and a pinion connected to a drive source.
It goes without saying that it is adapted to rotate slowly by other suitable power transmission means such as a chain.
また、燃焼室１０の内部には、その壁部下方に
適宜数のバーナ２８（燃焼源は都市ガスその他重
油等である）を開口させて、バーナによる燃焼加
熱帯域を形成し、更にこの帯域に図示の如く隔壁
３０を設けて前記帯域に隣接する煙道３２を画成
する。この煙道３２に排気管５０を連通接続し
て、後述する可燃性ガス燃焼後の気体を外部へ排
出するようにしておく。 Further, inside the combustion chamber 10, an appropriate number of burners 28 (combustion sources are city gas, heavy oil, etc.) are opened below the wall to form a combustion heating zone by the burners. A partition 30 is provided as shown to define a flue 32 adjacent the zone. An exhaust pipe 50 is connected to the flue 32 so that the gas after combustion of the combustible gas, which will be described later, is discharged to the outside.
このように構成したロータリーキルンにおい
て、前記加熱筒１２の周壁の適宜位置に貫通孔３
４を適当数穿設し、加熱筒１２内部と燃焼室１０
内とを前記貫通孔３４を介して連通する。この通
孔３４は、後述するように被加熱物から発生する
可燃性ガスを燃焼室１０中に向けて噴出させるた
めのものであるから、ガスの通過のみを許容し加
熱筒１２中の被処理物の落下は防止するような構
造にしておくのが望ましい。第３図乃至第５図に
示す構造は、その要請を満たすものであつて、第
３図では通孔３４に所定メツシユ（廃棄物の小塊
が通過しない程度のメツシユ寸法が、選択され
る）の耐熱性金網３６が張設されている。また、
第４図に示す如く加熱筒１２の内部において、前
記通孔３４に、加熱筒１２の略中心に指向する中
空筒体３８を突設すれば、加熱筒内の被処理物は
この中空筒体３８の開口部にまで届かないので、
被処理物の落下が防止される。更に、この中空筒
体３８の開口部に耐熱性金網４０を張設するよう
にすれば、一層効果的である。 In the rotary kiln configured as described above, through holes 3 are provided at appropriate positions on the peripheral wall of the heating cylinder 12.
4 is drilled in an appropriate number to form the inside of the heating cylinder 12 and the combustion chamber 10.
The inside communicates with each other through the through hole 34. This through hole 34 is for blowing out combustible gas generated from the object to be heated into the combustion chamber 10 as will be described later. It is desirable to have a structure that prevents objects from falling. The structure shown in FIGS. 3 to 5 satisfies this requirement, and in FIG. 3, a predetermined mesh is installed in the through hole 34 (the mesh size is selected such that small pieces of waste do not pass through). A heat-resistant wire mesh 36 is stretched. Also,
As shown in FIG. 4, inside the heating cylinder 12, if a hollow cylinder 38 is provided protruding from the through hole 34 and is oriented approximately toward the center of the heating cylinder 12, the object to be processed inside the heating cylinder can be transported through the hollow cylinder. Since it does not reach the opening of 38,
The objects to be treated are prevented from falling. Furthermore, it is even more effective if a heat-resistant wire mesh 40 is stretched over the opening of the hollow cylindrical body 38.
加熱筒１２に穿設した前記貫通孔３４から噴出
する可燃性ガスの良好な燃焼を促進する目的で、
燃焼室１０の壁部の適当位置、すなわち加熱筒１
２の貫通孔３４穿設位置と略対応する位置に、所
定数の外部空気供給孔４２の穿設し、この供給孔
４２を送気管４４に接続する。更に、加熱筒１２
内で発生した可燃性ガスの通孔３４からの噴出を
効率良く行い、併せて加熱筒１２中での被処理物
の酸化焼却を促進するために、第１図に示すよう
に加熱筒１２の被処理物排出側に空気供給管４６
を開口接続し、この空気供給管４６を図示しない
好ましくは熱風源に接続して、熱風を加熱筒１２
中に強制送気し得るよう構成しておく。この空気
供給管４６にはダンパ４８を配設して、供給風量
の調節を可能とするのが好ましい。 For the purpose of promoting good combustion of the combustible gas ejected from the through hole 34 bored in the heating cylinder 12,
An appropriate position on the wall of the combustion chamber 10, that is, the heating cylinder 1
A predetermined number of external air supply holes 42 are bored at positions substantially corresponding to the positions where the second through holes 34 are bored, and these supply holes 42 are connected to the air supply pipe 44 . Furthermore, the heating cylinder 12
In order to efficiently blow out the combustible gas generated within the heating cylinder 12 from the through hole 34 and also to promote oxidation and incineration of the material to be treated in the heating cylinder 12, the heating cylinder 12 is heated as shown in FIG. Air supply pipe 46 on the discharge side of the processed material
The air supply pipe 46 is preferably connected to a hot air source (not shown) to supply hot air to the heating cylinder 12.
It should be configured so that air can be forced inside. It is preferable that a damper 48 is disposed in the air supply pipe 46 to enable adjustment of the amount of air supplied.
このように構成した本発明に係るロータリーキ
ルンの作用効果につき、実際の供試実験に沿つて
以下説明する。 The effects of the rotary kiln according to the present invention configured as described above will be explained below based on actual test experiments.
米糠製油工場から廃棄物として出される廃土の
成分は、酸性白土50％、水分25％、油25％から成
つていた。先ず、燃焼室１０の下部に開口してい
るバーナ２８に点火して、このバーナ火炎により
加熱筒１２内の温度を約800℃に昇温し、また燃
焼室壁に設けた外部空気供給孔４２から空気を燃
焼室１０中に供給すると共に空気供給管４６に配
設したダンパ４８の開度を調節して熱風を加熱筒
１２中に強制的に送り込む。このとき、加熱筒１
２は回転状態に保持しておく。次いで、前記廃土
をホツパ２０より投入し、スクリユーコンベア２
６で供給筒２２中を搬送して、加熱筒１２内に順
次投入する。投入された廃土は加熱筒１２の回転
につれて撹拌加熱されながら軸線方向に徐々に前
進して脱水乾燥が行われ、貫通孔３４に到る頃ま
でには加熱された廃土から可燃性ガスが発生す
る。加熱筒１２中には熱風が供給されて加圧状態
になつているので、可燃性ガスは貫通孔３４を介
して燃焼室１０中に噴出し、ここでバーナ２８の
火炎により着火されて、以後は自己燃焼を継続す
る。この可燃性ガスの燃焼により加熱筒１２は更
に加熱されて、内部温度は略840℃〜850℃に上昇
し、その結果廃土は白味のグレー色を呈する程度
にまで焼かれ、このとき残留油性分は全く認めら
れなかつた。なお、加熱筒１２中に、酸素を大量
に含んだ熱風が空気供給管４６から強制供給され
る結果として、廃土の酸化焼却も促進される。 The waste soil from the rice bran oil refinery was composed of 50% acid clay, 25% water, and 25% oil. First, the burner 28 opened at the bottom of the combustion chamber 10 is ignited, and the burner flame raises the temperature inside the heating cylinder 12 to about 800°C, and the external air supply hole 42 provided in the wall of the combustion chamber is heated. Air is supplied from the combustion chamber 10 into the combustion chamber 10, and the opening degree of a damper 48 disposed in the air supply pipe 46 is adjusted to forcibly send hot air into the heating cylinder 12. At this time, heating tube 1
2 is kept in a rotating state. Next, the waste soil is put into the hopper 20 and transferred to the screw conveyor 2.
At 6, they are conveyed through the supply cylinder 22 and sequentially introduced into the heating cylinder 12. The input waste soil is stirred and heated as the heating cylinder 12 rotates, and gradually advances in the axial direction to be dehydrated and dried, and by the time it reaches the through hole 34, combustible gas is released from the heated waste soil. Occur. Since hot air is supplied into the heating cylinder 12 and it is in a pressurized state, the flammable gas is ejected into the combustion chamber 10 through the through hole 34, where it is ignited by the flame of the burner 28, and from then on continues to self-combust. The heating cylinder 12 is further heated by the combustion of this flammable gas, and the internal temperature rises to approximately 840°C to 850°C. As a result, the waste soil is burned to a whitish gray color, and at this time, the waste soil is burnt to a whitish gray color. No oily content was observed at all. In addition, as a result of forcibly supplying hot air containing a large amount of oxygen into the heating cylinder 12 from the air supply pipe 46, oxidation and incineration of the waste soil is also promoted.
可燃性ガスの燃焼が安定した時点でバーナ２８
による燃焼を停止したところ、加熱筒１２中の温
度は780℃〜800℃程度にまで降下し、焼却廃土の
呈する色もグレーから黒色に変化したが、残留油
性分は認められず、この焼却廃土はそのまま投
棄、埋立等に使用しても２次公害を惹起する惧れ
は全くないことが確認された。 When the combustion of combustible gas becomes stable, burner 28
When the combustion was stopped, the temperature in the heating cylinder 12 dropped to about 780°C to 800°C, and the color of the incinerated waste soil changed from gray to black, but no residual oily content was observed. It was confirmed that there is no risk of causing secondary pollution even if the waste soil is used as is for dumping or landfill.
このように、本発明に係るロータリーキルンで
可燃性物質を混有する廃棄物を焼却するようにす
れば、従来投棄その他処理が困難で、かつそのま
ま投棄すれば２次公害の原因となるような含油廃
棄物を無公害な焼却土に変換させることができ、
しかもその焼却過程において廃棄物自体が発生す
る可燃性ガスを積極的に利用して自己燃焼させる
ことにより、外部消費燃料の節約を大幅に達成す
ることができるので、省エネルギーの見地からも
極めて有益なものである。 In this way, by incinerating waste mixed with flammable substances in the rotary kiln according to the present invention, it is possible to incinerate waste containing oil, which is conventionally difficult to dump or otherwise dispose of, and which would cause secondary pollution if dumped as is. It is possible to convert materials into non-polluting incinerated soil,
Moreover, by actively utilizing the combustible gas generated by the waste itself during the incineration process and causing it to self-combust, it is possible to achieve a significant saving in externally consumed fuel, which is extremely beneficial from an energy saving perspective. It is something.
次に、第６図乃至第８図は本発明に係るロータ
リーキルンの他の実施例を概略図示する。基本構
成は第１図に示したロータリーキルンと同じなの
で、説明の重複を避けるため同一の部材について
は同じ参照符号で指示するものとする。燃焼室１
２中の排ガスは、排気管５０に接続する吸引フア
ン５２により外部を排出されるが、一部は分岐排
気管５４により原料投入用ホツパ２０に分配され
て、原料５６の予熱を行う。またバーナ２８の上
方には、耐熱性れんがで製造した通孔付の仕切板
５８が水平に配設され、前記バーナ２８の火焔が
加熱筒１２に直接放射されないようになつてい
る。加熱筒１２の周壁部適宜位置に貫通孔３４が
所定数穿設され、この貫通孔３４に加熱筒１２の
中心に指向する筒体３８が夫々接続される。この
筒体３８の開口部における開口形状は、第７図ａ
乃至ｄに示すように斜めに裁断したり、水平に裁
断したりすることが提案されるが、第６図及び第
７図ｃに示すように筒体３８の先端を略直角に屈
曲させ、その開口部を加熱筒１２の原料投入側に
指向させるように構成するのが好適である。 Next, FIGS. 6 to 8 schematically illustrate another embodiment of the rotary kiln according to the present invention. Since the basic configuration is the same as the rotary kiln shown in FIG. 1, the same members will be designated by the same reference numerals to avoid duplication of explanation. Combustion chamber 1
The exhaust gas in the hopper 20 is exhausted to the outside by a suction fan 52 connected to an exhaust pipe 50, but a portion is distributed to the raw material input hopper 20 through a branch exhaust pipe 54 to preheat the raw material 56. Further, above the burner 28, a partition plate 58 with a through hole made of heat-resistant brick is disposed horizontally to prevent the flame of the burner 28 from being directly radiated to the heating cylinder 12. A predetermined number of through holes 34 are bored at appropriate positions in the peripheral wall of the heating cylinder 12, and cylinder bodies 38 pointing toward the center of the heating cylinder 12 are connected to the through holes 34, respectively. The opening shape of the opening of this cylinder 38 is shown in FIG. 7a.
It is proposed to cut diagonally or horizontally as shown in FIGS. It is preferable to configure the opening to face the raw material input side of the heating cylinder 12.
このような構成において、原料５６をホツパ２
０に投入して加熱筒１２中に供給すれば、加熱筒
１２の回転に伴い原料１２は撹拌加熱されながら
排出側に向けて移送される。このとき、燃焼室１
０中には、バーナ２８の稼動により高温の燃焼ガ
スが充満し、この燃焼ガスの一部は前記貫通孔３
４に設けた筒体３８を介して加熱筒１２中に導入
され、この燃焼ガスの熱により加熱筒１２内の原
料５６を直接加熱するので、極めて熱効率の高い
加熱処理を達成することが可能である。なお、第
６図では貫通孔３４を加熱筒１２の略中央から排
出側にかけて穿設した例となつているが、この貫
通孔３４を加熱筒１２の原料供給側に近接した位
置に穿設するようにすれば、導入された高温燃焼
ガスにより原料５６の予熱も同時に行えるので、
熱効率は更に向上する。また、筒体３８の開口部
を第６図に示すように加熱筒１２の原料供給側に
指向させておくことにより、同じく原料予熱を達
成することができ、省エネルギーに寄与し得るも
のである。 In such a configuration, the raw material 56 is transferred to the hopper 2.
0 and supplied into the heating cylinder 12, the raw material 12 is stirred and heated as the heating cylinder 12 rotates and is transferred toward the discharge side. At this time, combustion chamber 1
0 is filled with high-temperature combustion gas due to the operation of the burner 28, and a portion of this combustion gas flows into the through hole 3.
The combustion gas is introduced into the heating cylinder 12 through the cylinder 38 provided in the cylinder 4, and the raw material 56 in the heating cylinder 12 is directly heated by the heat of this combustion gas, making it possible to achieve heat treatment with extremely high thermal efficiency. be. Although FIG. 6 shows an example in which the through hole 34 is drilled from approximately the center of the heating cylinder 12 to the discharge side, this through hole 34 may be bored at a position close to the raw material supply side of the heating cylinder 12. By doing so, the raw material 56 can be preheated at the same time by the introduced high-temperature combustion gas.
Thermal efficiency is further improved. In addition, by directing the opening of the cylinder 38 toward the raw material supply side of the heating cylinder 12 as shown in FIG. 6, preheating of the raw material can be similarly achieved, contributing to energy saving.
第１図は本発明に係るロータリーキルンの一実
施例の概略構成を示す縦断面図、第２図は第１図
の−線断面図、第３図乃至第５図は本発明に
係るロータリーキルンにおいて廃棄物が加熱筒か
ら焼却室中へ落下するのを防止するための各実施
例の斜視図、第６図は本発明の別の実施例に係る
ロータリーキルンの縦断面図、第７図ａ乃至第７
図ｄは筒体の開口形態の実施例を示す概略図、第
８図は第６図のＡ−Ａ線断面図である。
１０；燃焼室、１２；加熱筒、３４；貫通孔、
３６；金網、３８；筒体、４０；金網、４２；外
部空気供給孔、４６；空気供給管。
FIG. 1 is a longitudinal cross-sectional view showing a schematic configuration of an embodiment of the rotary kiln according to the present invention, FIG. 2 is a cross-sectional view taken along the line -- in FIG. 1, and FIGS. A perspective view of each embodiment for preventing objects from falling from a heating cylinder into an incineration chamber, FIG. 6 is a vertical sectional view of a rotary kiln according to another embodiment of the present invention, and FIGS. 7a to 7
FIG. d is a schematic diagram showing an example of the opening form of the cylinder, and FIG. 8 is a sectional view taken along the line A--A in FIG. 6. 10; combustion chamber, 12; heating cylinder, 34; through hole,
36; wire mesh, 38; cylindrical body, 40; wire mesh, 42; external air supply hole, 46; air supply pipe.
Claims (1)
前記加熱筒の一端から投入された被処理物を該加
熱筒の回転により他端へ移送しつつ撹拌加熱する
ロータリーキルンにおいて、加熱筒周壁の適宜位
置に適当数の貫通孔を穿設したことを特徴とする
ロータリーキルン。 ２ 加熱筒中に投入される被処理物が可燃性物質
を混有する物質であつて、加熱撹拌により被処理
物から発生する可燃性ガスを前記貫通孔を介して
燃焼室中に噴出し得るよう構成したことを特徴と
する特許請求の範囲第１項記載のロータリーキル
ン。 ３ 燃焼室中で発生する高温燃焼ガスを前記貫通
孔を介して加熱筒内に導入し得るよう構成したこ
とを特徴とする特許請求の範囲第１項記載のロー
タリーキルン。 ４ 前記貫通孔に所定メツシユの金網を張設した
ことを特徴とする特許請求の範囲第１項乃至第３
項の何れかに記載のロータリーキルン。 ５ 前記貫通孔に加熱筒の略中心方向に向けて筒
体を突設したことを特徴とする特許請求の範囲第
１項乃至第３項の何れかに記載のロータリーキル
ン。 ６ 前記筒体の開口部に所定メツシユの金網を張
設したことを特徴とする特許請求の範囲第５項記
載のロータリーキルン。 ７ 前記筒体の先端を屈曲させ、筒体開口部を加
熱筒の被処理物供給側に指向させたことを特徴と
する特許請求の範囲第５項記載のロータリーキル
ン。 ８ 燃焼室壁部に、前記加熱筒の貫通孔穿設位置
と略対応的に所定数の外部空気供給孔を穿設した
ことを特徴とする特許請求の範囲第１項または第
２項記載のロータリーキルン。 ９ 加熱筒の被処理物排出側に空気供給管を臨ま
せたことを特徴とする特許請求の範囲第１項、第
２項及び第８項の何れかに記載のロータリーキル
ン。[Claims] 1. A heating cylinder is arranged rotatably through the combustion chamber,
A rotary kiln that stirs and heats a workpiece introduced from one end of the heating cylinder while transferring it to the other end by rotation of the heating cylinder, characterized in that an appropriate number of through holes are bored at appropriate positions on the peripheral wall of the heating cylinder. rotary kiln. 2. The material to be treated that is introduced into the heating cylinder is a substance containing a flammable substance, and is configured so that the combustible gas generated from the material to be treated by heating and stirring can be ejected into the combustion chamber through the through hole. A rotary kiln according to claim 1, characterized in that: 3. The rotary kiln according to claim 1, wherein the rotary kiln is configured such that high-temperature combustion gas generated in the combustion chamber can be introduced into the heating cylinder through the through hole. 4. Claims 1 to 3, characterized in that a wire mesh of a predetermined mesh is stretched over the through hole.
The rotary kiln described in any of the paragraphs. 5. The rotary kiln according to any one of claims 1 to 3, characterized in that a cylindrical body is provided in the through hole protruding toward substantially the center of the heating cylinder. 6. The rotary kiln according to claim 5, wherein a wire gauze of a predetermined mesh is stretched over the opening of the cylindrical body. 7. The rotary kiln according to claim 5, wherein the tip of the cylindrical body is bent and the opening of the cylindrical body is directed toward the processing object supply side of the heating cylinder. 8. The combustion chamber according to claim 1 or 2, characterized in that a predetermined number of external air supply holes are bored in the combustion chamber wall in a manner substantially corresponding to the positions of the through holes in the heating cylinder. rotary kiln. 9. The rotary kiln according to any one of claims 1, 2, and 8, characterized in that an air supply pipe faces the material discharge side of the heating cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP821582A JPS58124192A (en) | 1982-01-21 | 1982-01-21 | Rotary kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP821582A JPS58124192A (en) | 1982-01-21 | 1982-01-21 | Rotary kiln |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58124192A JPS58124192A (en) | 1983-07-23 |
| JPH0139035B2 true JPH0139035B2 (en) | 1989-08-17 |
Family
ID=11686997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP821582A Granted JPS58124192A (en) | 1982-01-21 | 1982-01-21 | Rotary kiln |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58124192A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1228409B (en) * | 1983-12-12 | 1991-06-14 | Cam Srl | PLANT FOR DRYING THE TURNING OR SCRAP BEFORE THEIR USE IN THE MELTING FURNACES AND FOR THE TREATMENT OF WASTE AND OTHER WASTE MATERIALS |
| JP2008032300A (en) * | 2006-07-27 | 2008-02-14 | Japan Sewage Works Agency | External heating-type rotary kiln |
| JP2013224357A (en) * | 2012-04-20 | 2013-10-31 | Takasago Ind Co Ltd | Method and device for immobilizing co2 |
| JP2019157114A (en) * | 2018-03-13 | 2019-09-19 | 大同特殊鋼株式会社 | Carbonization processing method and carbonization processor |
-
1982
- 1982-01-21 JP JP821582A patent/JPS58124192A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58124192A (en) | 1983-07-23 |
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