JP3420623B2 - Desulfurization firing device - Google Patents
Desulfurization firing deviceInfo
- Publication number
- JP3420623B2 JP3420623B2 JP28549593A JP28549593A JP3420623B2 JP 3420623 B2 JP3420623 B2 JP 3420623B2 JP 28549593 A JP28549593 A JP 28549593A JP 28549593 A JP28549593 A JP 28549593A JP 3420623 B2 JP3420623 B2 JP 3420623B2
- Authority
- JP
- Japan
- Prior art keywords
- rotary furnace
- hearth
- preheating device
- raw material
- desulfurization
- 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 - Fee Related
Links
Classifications
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/40—Production or processing of lime, e.g. limestone regeneration of lime in pulp and sugar mills
Landscapes
- Treating Waste Gases (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
Description
【0001】[0001]
【産業上の利用分野】この発明は粒塊状の石灰石、ドロ
マイト、マグネサイト等の硫黄分と反応する成分を含有
する鉱物あるいは各種の無機物質を混合・成型して作っ
たペレット、各種の無機物質と有機物質とを混合・成型
して作ったペレット等の粒塊状の原料を高温下で焼成し
て製品を得る技術分野において利用され、特にその脱硫
焼成装置に関する。BACKGROUND OF THE INVENTION This invention relates to pellets prepared by mixing and molding minerals or various inorganic substances containing a component that reacts with sulfur such as agglomerated limestone, dolomite and magnesite, and various inorganic substances. It is used in the technical field of obtaining a product by firing an agglomerate raw material such as pellets, which is produced by mixing and molding an organic substance with an organic substance, and particularly relates to a desulfurization firing apparatus thereof.
【0002】[0002]
【従来の技術】上記の原料を高温下で焼成するために
は、水平面に対して僅かに傾斜する軸線のまわりに緩や
かに回転する筒状の回転炉が広く使用されている。粒塊
状の原料は筒状の回転炉の上方側の一端から供給され、
回転炉の回転を受けつつ下方側の他端に向かって移動す
る。2. Description of the Related Art In order to bake the above raw materials at a high temperature, a cylindrical rotary furnace which is gently rotated around an axis slightly inclined with respect to a horizontal plane is widely used. The agglomerate raw material is supplied from one end on the upper side of the cylindrical rotary furnace,
It moves toward the other end on the lower side while receiving the rotation of the rotary furnace.
【0003】一方、上記回転炉の他端からは液体燃料あ
るいは微粉炭の燃焼炎及び燃焼ガスが上記原料の移動方
向に対して向流するように供給されており、上記原料は
移動中に加熱焼成され、回転炉の他端から落下して冷却
装置に送られる。On the other hand, the combustion flame and combustion gas of liquid fuel or pulverized coal are supplied from the other end of the rotary furnace so as to flow countercurrently to the moving direction of the raw material, and the raw material is heated during the movement. It is baked, dropped from the other end of the rotary furnace, and sent to the cooling device.
【0004】[0004]
【発明が解決しようとする課題】上記筒状の回転炉で
は、燃焼ガスは回転炉中の原料の層表面のみと接触する
ので、原料と燃焼ガスの間の熱エネルギー伝達の速度が
大きくなく、燃焼ガスが十分なる熱交換を行わずに原料
の供給側の一端から高い温度のまま排出されるので、大
量の熱エネルギーが損失となる。したがって、製品単位
量当たりに必要とする燃料使用量が大きなものとなって
しまう。In the above cylindrical rotary furnace, the combustion gas comes into contact only with the layer surface of the raw material in the rotary furnace, so that the rate of heat energy transfer between the raw material and the combustion gas is not large, Since the combustion gas is discharged from one end on the feed side of the raw material at a high temperature without sufficient heat exchange, a large amount of heat energy is lost. Therefore, a large amount of fuel is required per unit amount of product.
【0005】高温燃焼ガスの保有する大量の熱エネルギ
ーを回収するためには、いわゆる予熱装置が従来使用さ
れていた。この予熱装置は、例えば、粒塊状原料を堆積
層として形成し、これをゆっくりと移動させ、堆積層の
空隙中に、上記回転炉から排出された高温燃焼ガスを貫
流させて、原料を回転炉での焼成に先立ち予め加熱する
ことにより、高温燃焼ガスの保有熱エネルギーを回収す
るものである。該予熱装置の設置によって製品単位当た
りの必要燃料量が大幅に減少し、省エネルギー効果が大
となる。A so-called preheating device has been conventionally used to recover a large amount of heat energy held by the high temperature combustion gas. This preheating device forms, for example, an agglomerated raw material as a deposited layer, slowly moves it, and causes the high-temperature combustion gas discharged from the rotary furnace to flow through the voids of the deposited layer to feed the raw material to the rotary furnace. By preheating before the firing in step 1, the retained thermal energy of the high temperature combustion gas is recovered. By installing the preheating device, the required fuel amount per product unit is significantly reduced, and the energy saving effect becomes great.
【0006】予熱装置を伴わない回転炉で硫黄分の多い
燃料を燃焼して、例えば石灰石・ドロマイトなどを焼成
する場合には、燃焼ガス流と粒塊層との接触が不十分で
あるため、燃焼ガス中のSOxは殆ど石灰石・ドロマイ
トに吸収されないですむ。しかしながら回転炉に予熱装
置が付置されている場合においては、該予熱装置内の原
料粒塊の堆積層中を高温燃焼ガスが貫流するため、燃焼
ガスと粒塊の接触する表面積が大きい。また、粒塊堆積
層内にはSOxの吸収に好適な温度帯が存在する。した
がって、燃焼ガス中のSOxの相当割合が原料粒塊中の
CaO,MgOなどと反応して吸収されてしまう。すなわ
ち、予熱装置にて硫黄分を含むこととなった原料粒塊を
回転炉内で焼成することになるので、焼成製品中に硫黄
分が相当多く存在することになる。その結果、硫黄分を
嫌う製品に対しては 硫黄分を含まない液体または気体
燃料を使用する必要があり、燃料コストが高くなってし
まうという問題がある。[0006] When burning a fuel rich in sulfur in a rotary furnace without a preheating device to burn limestone or dolomite, for example, the contact between the combustion gas flow and the agglomerate layer is insufficient. SO x in combustion gas is hardly absorbed by limestone and dolomite. However, when the preheating device is attached to the rotary furnace, since the high temperature combustion gas flows through the deposition layer of the raw material agglomerates in the preheating device, the surface area of contact between the combustion gas and the agglomerates is large. In addition, there is a temperature zone suitable for absorbing SO x in the agglomerated layer. Therefore, a considerable proportion of SO x in the combustion gas is contained in the raw material agglomerates.
It is absorbed by reacting with CaO and MgO . That is, since the raw material agglomerates containing the sulfur content in the preheating device are fired in the rotary furnace, the sulfur content is considerably large in the fired product. As a result, it is necessary to use liquid or gas fuel that does not contain sulfur for products that do not like sulfur, which causes a problem of high fuel cost.
【0007】本発明は、かかる問題を解決し、回転炉と
予熱装置とを併用する場合、硫黄分を含有する重油ある
いは微粉炭等の燃料を使用しても製品として硫黄化合物
含有量の極めて少ない焼成製品を得る装置を提供するこ
とを目的とする。The present invention solves such a problem, and when a rotary furnace and a preheating device are used together, even if a fuel such as heavy oil or pulverized coal containing sulfur is used, the product has a very low sulfur compound content. It is an object to provide an apparatus for obtaining a baked product.
【0008】[0008]
【課題を解決するための手段】本発明によれば、上記目
的は、外部から供給される粒塊状の原料を受けて堆積層
を形成する炉床を備える予熱装置と、該予熱装置に連通
して上記炉床から順次落下する原料を受け、回転しつつ
該原料を排出部に移動せしめる回転炉とを有し、該回転
炉の排出部には加熱ガスを回転炉内に送入する加熱ガス
送入管が備えられていて、該加熱ガスが回転炉から上記
予熱装置に向け原料の流れに対して向流した後に上記堆
積層を貫流する焼成装置において、予熱装置には炉床が
鉛直線を中心に回転する水平面として形成され、上記回
転炉内の空間から予熱装置内の空間までの空間内でかつ
炉床よりも下方の任意位置に、外部から脱硫微粉体を噴
霧する送粉管が設けられていることにより達成される。According to the present invention, the above object is to provide a preheating device provided with a hearth for receiving a raw material in the form of agglomerates supplied from the outside to form a deposition layer, and communicating with the preheating device. And a rotary furnace that receives the raw materials sequentially falling from the hearth and moves the raw materials to the discharge portion while rotating, and the heating gas that feeds the heating gas into the rotary furnace at the discharge portion of the rotary furnace. In a calcining device that is provided with an inlet pipe and in which the heating gas flows from the rotary furnace to the preheating device countercurrent to the flow of the raw material and then flows through the deposition layer, the preheating device has a hearth.
Is formed as a horizontal surface that rotates about a vertical line, and in the space from the space of the rotary furnace until space in the preheating device
This is achieved by providing a powder feeding pipe for spraying desulfurized fine powder from the outside at an arbitrary position below the hearth .
【0009】[0009]
【0010】[0010]
【作用】かかる構成の本発明にあっては、硫黄分と反応
する成分を含有する原料の微粉体が送粉管から燃焼ガス
中に噴霧供給される。該微粉体は燃焼ガス中に分散さ
れ、短時間で上記硫黄分と反応し、例えば、微粉体が微
粉状石灰石の場合、微粉状硫黄化合物を生ずる。かくし
て、高温の燃焼ガスが回転炉内の空間から予熱装置内の
堆積層に到達するまでの間に、該燃焼ガス中のSOxが
上記微粉体と反応して化学的に該微粉体により吸収され
る。この硫黄化合物を含んだ微粉体の大部分は、燃焼ガ
スの流れに乗って上記予熱装置内の堆積層の空隙中を貫
流し、該予熱装置から排出される。In the present invention having such a structure, the fine powder of the raw material containing the component that reacts with the sulfur content is spray-supplied from the powder feeding pipe into the combustion gas. The fine powder is dispersed in the combustion gas and reacts with the above-mentioned sulfur in a short time, for example, when the fine powder is finely powdered limestone, a finely powdered sulfur compound is produced. Thus, SOx in the combustion gas reacts with the fine powder and is chemically absorbed by the fine powder until the high-temperature combustion gas reaches the deposition layer in the preheating device from the space in the rotary furnace. It Most of the fine powder containing the sulfur compound flows along with the flow of the combustion gas, flows through the voids of the deposition layer in the preheating device, and is discharged from the preheating device.
【0011】[0011]
【実施例】以下、添付図面にもとづき本発明の実施例を
説明する。Embodiments of the present invention will be described below with reference to the accompanying drawings.
【0012】図1は本発明の第一実施例の縦断面図であ
る。FIG. 1 is a vertical sectional view of a first embodiment of the present invention.
【0013】図1において、符号1は横型筒状をなす回
転体から成る回転炉であり、その軸線2は水平面に対し
僅かな角度θだけ傾斜し、軸受装置(図示せず)により
上記軸線2まわりに回転自在に支持されており、駆動装
置(図示せず)により回転駆動を受けている。上記回転
炉1は軸線2方向の両端部に開口1A,1Bを有してお
り、下端側(図において左端側)の開口1Bに、流体ま
たは微粉状の燃料を供給する燃料供給管3が配設されて
いる。また、該燃料供給管3と共に燃焼用の空気を供給
する送気管4も近接して設けられており、燃料は開口1
Bに近い空間において燃焼し、高温の燃焼ガスを発生す
る。なお、上記燃料供給管3と送気管4に代え、すでに
燃焼している燃焼ガスを供給する加熱ガス供給管を設け
ることとしてもよい。In FIG. 1, reference numeral 1 is a rotary furnace composed of a rotating body having a horizontal tubular shape, and its axis 2 is inclined at a slight angle θ with respect to a horizontal plane, and the axis 2 is made by a bearing device (not shown). It is rotatably supported around and is rotationally driven by a drive device (not shown). The rotary furnace 1 has openings 1A and 1B at both ends in the direction of the axis 2, and a fuel supply pipe 3 for supplying a fluid or fine powder fuel is arranged in the opening 1B on the lower end side (the left end side in the figure). It is set up. Further, an air supply pipe 4 for supplying combustion air is provided in proximity to the fuel supply pipe 3, and the fuel is supplied through the opening 1
It burns in a space close to B and generates high-temperature combustion gas. It should be noted that instead of the fuel supply pipe 3 and the air supply pipe 4, a heating gas supply pipe for supplying combustion gas that has already burned may be provided.
【0014】上記回転炉1の下端側の排出部としての開
口1Bには、回転炉1との相対回転を許容するシール5
Aを有し、上記開口1Bを閉塞するように下方に延びる
製品排出管5が設けられている。A seal 5 for allowing relative rotation with respect to the rotary furnace 1 is provided in the opening 1B as a discharge portion on the lower end side of the rotary furnace 1.
A product discharge pipe 5 having A and extending downward so as to close the opening 1B is provided.
【0015】上記回転炉1の上端側上方位置には、予熱
装置6が配設されている。A preheating device 6 is arranged above the upper end of the rotary furnace 1.
【0016】上記予熱装置6は、鉛直軸線7を中心とし
て水平面内で回転する環板状の炉床8と、該炉床8の上
方位置に不動に配設され下向きの補助燃料供給管9と送
気管9Aとを有する炉蓋10と、上記炉床8の外周部に
て該炉床8の回転を許容するシール11を有する周壁1
2とを備え、上記炉床8と周壁12及び炉蓋10の外周
部により包囲される環状空間に原料の堆積層13を形成
するようになっている。上記補助燃料供給管9からの燃
料により予熱装置6内での予熱を助けることができる。
なお、上記補助燃料供給管は本発明にあって、必須のも
のではない。The preheating device 6 includes an annular plate-shaped hearth 8 that rotates in a horizontal plane about a vertical axis 7 and an auxiliary fuel supply pipe 9 that is fixedly disposed above the hearth 8 and faces downward. A furnace lid 10 having an air supply pipe 9A, and a peripheral wall 1 having a seal 11 at the outer peripheral portion of the hearth 8 for allowing the hearth 8 to rotate.
2, and a raw material deposit layer 13 is formed in an annular space surrounded by the hearth 8, the peripheral wall 12 and the outer peripheral portion of the furnace lid 10. The fuel from the auxiliary fuel supply pipe 9 can assist the preheating in the preheating device 6.
The auxiliary fuel supply pipe is not essential in the present invention.
【0017】上記予熱装置6の上方位置には、原料貯槽
(図示せず)が設けられ、焼成されるべき原料として、
硫黄分と反応する成分を含有する粒塊物が内部に貯槽さ
れている。該原料貯槽からは供給管14が下方に延びて
おり、その下端は、炉床8上に原料を供給し上記堆積層
13を形成するように上記炉蓋10に臨んでいる。A raw material storage tank (not shown) is provided above the preheating device 6 and serves as a raw material to be fired.
An agglomerate containing a component that reacts with the sulfur content is stored inside. A supply pipe 14 extends downward from the raw material storage tank, and its lower end faces the furnace lid 10 so as to supply the raw material onto the hearth 8 and form the deposited layer 13.
【0018】上記周壁12には該周壁12を半径方向に
貫通して長手方向に適宜往復動する棒状のプッシャー1
5が周方向の複数位置に適宜設けられている。A rod-shaped pusher 1 which passes through the peripheral wall 12 in the radial direction and reciprocates in the longitudinal direction as needed.
5 are appropriately provided at a plurality of positions in the circumferential direction.
【0019】さらに、上記炉蓋10の外周部には、弁
(図示せず)をもつ排気管16が周方向の複数位置に接
続されている。Further, exhaust pipes 16 having valves (not shown) are connected to the outer peripheral portion of the furnace lid 10 at a plurality of circumferential positions.
【0020】上記予熱装置6の炉床8は中心部が開口し
ていてテーパ状に下方に延出して案内部8Aを形成して
いる。該案内部8Aの下方には、上記炉床8から落下し
た原料を回転炉1へ供給するために、該案内部8Aとの
相対回転を許容するシール17を介して斜め下方に延び
るシュート管18が設けられている。該シュート管18
の下端部18Aは、上記回転炉1の上端側の開口1A内
に臨んでいる。さらに、該回転炉1の開口1Aの側方に
は、該回転炉1との相対回転を許容するシール19Aを
有する筒状の空塔体19が上方に延び、その上部が上記
シュート管18の上部側部に連通して、上記空塔体19
が回転炉1と予熱装置6との間に連通空間を形成してい
る。The hearth 8 of the preheating device 6 is open at the center and extends downward in a tapered shape to form a guide portion 8A. Below the guide portion 8A, it falls from the hearth 8.
In order to supply the raw material to the rotary furnace 1, a chute tube 18 extending obliquely downward is provided via a seal 17 that allows relative rotation with the guide portion 8A. The shoot tube 18
The lower end 18A of the rotary furnace 1 faces the opening 1A on the upper end side of the rotary furnace 1. Further, on the side of the opening 1A of the rotary furnace 1, a cylindrical hollow tower body 19 having a seal 19A for allowing relative rotation with the rotary furnace 1 extends upward, and the upper part thereof is
The empty tube body 19 is connected to the upper side portion of the chute tube 18 and
Forms a communication space between the rotary furnace 1 and the preheating device 6 .
【0021】さらに、上記回転炉1の上端側開口1Aに
は、上記空塔体19を貫通して、硫黄分と反応する成分
を含有する微粉体、例えば焼成対象となっている原料の
微粉体を供給するための送粉管20が設けられている。Further, in the opening 1A on the upper end side of the rotary furnace 1, a fine powder containing a component which penetrates the hollow tower body 19 and reacts with a sulfur content, for example, a fine powder of a raw material to be fired. A powder feeding tube 20 for supplying the powder is provided.
【0022】かかる構成の本実施例装置にあっては、原
料たる粒塊物は次の要領で焼成される。In the apparatus of this embodiment having such a structure, the granular material as a raw material is fired in the following manner.
【0023】先ず、原料貯槽から供給管14を経て予熱
装置6の炉床8上に原料たる上記粒塊物が落下供給され
る。炉床8が軸線を中心としてゆっくりと回転している
ために、粒塊物は周方向に均一な堆積層13を形成す
る。堆積層13が形成される炉床8上の空間は半径内方
に開放されているため、上記堆積層13は図1に図示の
ごとく安息角をもって、上記空間に対向する斜面を形成
するようになる。First, the above-mentioned agglomerates as raw materials are dropped and supplied from the raw material storage tank through the supply pipe 14 onto the hearth 8 of the preheating device 6. Since the hearth 8 rotates slowly about the axis, the agglomerates form a uniform deposit layer 13 in the circumferential direction. Since the space on the hearth 8 where the deposit layer 13 is formed is opened inwardly of the radius, the deposit layer 13 forms a slope facing the space with a repose angle as shown in FIG. Become.
【0024】炉床8上の空間は、補助燃料供給管9で生
成される燃焼ガス及び回転炉1からの燃焼ガスで充満さ
れており、上記炉床8上の粒塊物は、上記燃焼ガスが該
粒塊物間の空隙を貫流して排気管16に至る際の対流伝
熱と、斜面での放射伝熱とによって予熱され一次焼成さ
れる。そして、逐次、プッシャー15の往復動により、
上記一次焼成された粒塊物は斜面側から落下する。The space on the hearth 8 is filled with the combustion gas generated in the auxiliary fuel supply pipe 9 and the combustion gas from the rotary furnace 1. The agglomerates on the hearth 8 are the combustion gas. Is preheated by convective heat transfer when passing through the voids between the agglomerates and reaching the exhaust pipe 16 and radiant heat transfer on the slope, and is primarily fired. Then, as the pusher 15 reciprocates,
The above-mentioned primary calcinated agglomerates fall from the slope side.
【0025】落下した粒塊物はシュート管18に案内さ
れて、回転炉1に到達する。回転炉1は軸線2が水平面
に対して傾斜しており、かつ該軸線2のまわりにゆっく
りと回転しているので、粒塊物は転動を受けながら上端
側から下端側に向け(図において左方へ)移動する。回
転炉1内では、燃料供給管3にて生成された燃焼ガスが
粒塊物の移動方向に対して向流するように下端側から上
端側に向け流れており、すでに予熱装置6にて予熱を受
けた上記粒塊物は上記回転炉1にて十分焼成される。焼
成された粒塊物は回転炉1の下端側開口1Bから製品排
出管5へ逐次落下し、ここで冷却されて製品として取り
出される。The dropped agglomerates are guided by the chute tube 18 and reach the rotary furnace 1. Since the axis 2 of the rotary furnace 1 is inclined with respect to the horizontal plane and is slowly rotating around the axis 2, the agglomerates are rolled and directed from the upper end side to the lower end side (in the figure, Move to the left). In the rotary furnace 1, the combustion gas generated in the fuel supply pipe 3 flows from the lower end side to the upper end side so as to flow countercurrently to the moving direction of the agglomerates, and has already been preheated by the preheating device 6. The above-mentioned agglomerates that have been received are sufficiently fired in the rotary furnace 1. The fired agglomerates successively fall from the lower end side opening 1B of the rotary furnace 1 to the product discharge pipe 5, where they are cooled and taken out as a product.
【0026】上記燃焼ガスは回転炉1で粒塊物を焼成し
た後、回転炉1の上端部開口に配された送粉体20から
噴霧供給される微粉体と接触する。重油、微粉炭等を燃
料として生成された上記燃焼ガスには硫黄分が含有され
ており、硫黄分と反応する成分を含有し噴霧供給された
微粉体(原料の微粉体でよい)、例えば原料が石灰石の
場合、微粉状石灰石が上記燃焼ガス中の硫黄分(SO
x)と反応し微粉状の化合物を生成する。すなわち、燃
焼ガス中の硫黄分は微粉状の上記化合物に吸収される。After burning the agglomerates in the rotary furnace 1, the combustion gas comes into contact with the fine powder spray-supplied from the powder-sending powder 20 arranged at the upper end opening of the rotary furnace 1. The combustion gas produced by using heavy oil, pulverized coal, etc. as a fuel contains a sulfur content, and a fine powder (a fine powder of a raw material may be used) containing a component that reacts with the sulfur content and supplied by spraying, for example, a raw material Is limestone, the finely divided limestone is the sulfur content (SO
reacts with x) to produce a finely divided compound. That is, the sulfur content in the combustion gas is absorbed by the compound in the form of fine powder.
【0027】上記燃焼ガスは空塔体19の内部空間を上
昇し、予熱装置6の内部空間に到達する。上記微粉状の
化合物も、上記燃焼ガスの流れに乗って上記予熱装置6
に達する。かかる化合物を伴う燃焼ガスは依然高温状態
にあり、予熱装置で生成された燃焼ガスと一緒になっ
て、予熱装置6の炉床8上に形成された原料の堆積層1
3の空隙を貫流し、ここで堆積層13の原料を予熱した
後、降温した状態で排気管16を経て排気される。その
際、上記原料粒塊物に形成される空隙に対し、微粉状の
化合物は十分に小さいものであり、該空隙を貫通して上
記燃焼ガスと共に排出される。かくして、本実施例にあ
っては、燃焼ガスが予熱装置6内にて堆積層を予熱する
前に燃焼ガス中の硫黄分は微粉体として化合してしまっ
ており、堆積層を貫流する際に原料と反応することなく
排気される。The combustion gas rises in the inner space of the empty column body 19 and reaches the inner space of the preheating device 6. The finely powdered compound also rides on the flow of the combustion gas and the preheating device 6
Reach Combustion gas with such compounds is still in a high temperature state, and together with the combustion gas generated in the preheating device, the deposited layer 1 of the raw material formed on the hearth 8 of the preheating device 6.
After passing through the void 3 and preheating the raw material of the deposited layer 13 there, the material is exhausted through the exhaust pipe 16 in a state of being cooled. At that time, the fine powdery compound is sufficiently small with respect to the voids formed in the raw material agglomerate, and penetrates through the voids and is discharged together with the combustion gas. Thus, in the present embodiment, before the combustion gas preheats the deposited layer in the preheating device 6, the sulfur content in the combustion gas is combined as fine powder, and when flowing through the deposited layer. Exhausted without reacting with raw materials.
【0028】本実施例において、微粉体の送入を行う送
粉管の位置は必ずしも筒状の回転炉1内に限定されず、
例えば図1の送粉管20Aのように空塔体19内の任意
の位置でもよい。そして、この場合、送粉管20A,2
0Bの形状・寸法・数は任意である。In the present embodiment, the position of the powder feeding tube for feeding the fine powder is not necessarily limited to the cylindrical rotary furnace 1,
For example but it may also at any position in the superficial body 19 as Okukonakan 20A of FIG. And in this case, the powder transfer tubes 20A, 2
The shape, size, and number of 0B are arbitrary.
【0029】筒状の回転炉1と予熱装置6とを連結する
空塔体19は、必ずしも図1のような構成のものに限定
されず、例えば第二実施例としての図2の符号21で示
されるように、原料たる粒塊物の落下供給と高温燃焼ガ
スの流通を同一空間中で行う構成のものでも差し支えな
い。なお、図2において図1と共通部分には同一符号を
付し、その説明は省略することとする(後述の図3につ
いても同様)。The empty column body 19 connecting the cylindrical rotary furnace 1 and the preheating device 6 is not necessarily limited to the one having the structure as shown in FIG. 1, and is, for example, the reference numeral 21 in FIG. 2 as the second embodiment. As shown in the drawing, the structure in which the drop supply of the granular material as the raw material and the circulation of the high temperature combustion gas are performed in the same space may be used. In FIG. 2, the same parts as those in FIG. 1 are designated by the same reference numerals, and the description thereof will be omitted (the same applies to FIG. 3 described later).
【0030】また、予熱装置6も必ずしも図1に示され
る構成のものに限定されず、高温燃焼ガスが粒塊状原料
の堆積層中を貫流することによって熱エネルギーを交換
するものであれば、その形式・形状は任意である。ま
た、図1の補助燃料供給管9、燃焼用空気を送り込む送
気管9Aの設置されていないものであってもよい。Further, the preheating device 6 is not necessarily limited to the one shown in FIG. 1 as long as the high temperature combustion gas exchanges thermal energy by flowing through the deposition layer of the agglomerate raw material. The format and shape are arbitrary. Further, the auxiliary fuel supply pipe 9 and the air supply pipe 9A for feeding the combustion air in FIG. 1 may not be installed.
【0031】水平面内にて鉛直軸線のまわりに回転する
炉床を有する予熱装置の場合には、必ずしも図1のもの
に限定されず、例えば図3のように炉床が上下二段に構
成されている場合でも差し支えない。図において、符号
22はもう一つの炉床であり、図1と同様の炉床8上の
粒塊堆積層13上方にもう一つの環状粒塊堆積層23を
形成する。また、符号24は燃焼ガスの一部を装置外に
分流するための排気管である。In the case of a preheating device having a hearth rotating in the horizontal plane around the vertical axis, the preheating device is not necessarily limited to the one shown in FIG. 1, but the hearth is composed of upper and lower two stages as shown in FIG. 3, for example. Even if it does. In the drawing, reference numeral 22 is another hearth, and another annular grain agglomerate deposition layer 23 is formed above the grain agglomerate deposit layer 13 on the hearth 8 as in FIG. Further, reference numeral 24 is an exhaust pipe for diverting a part of the combustion gas to the outside of the device.
【0032】本発明において、微粉体は燃焼ガス中の硫
黄分と反応する成分を含有していれば特に限定はない
が、原料の微粉体を用いるのが最も簡単である。例え
ば、焼成されるべき原料が、石灰石、ドロマイト、マグ
ネサイト等の一つである場合、微粉体はこれらのうちの
任意の一つで良いが、原料と同一とするのがより簡単で
あろう。In the present invention, the fine powder is not particularly limited as long as it contains a component that reacts with the sulfur content in the combustion gas, but it is easiest to use the fine powder as the raw material. For example, if the raw material to be fired is one of limestone, dolomite, magnesite, etc., the fine powder can be any one of these, but it would be easier to make it identical to the raw material .
【0033】[0033]
【発明の効果】以上のように本発明によれば、粒塊状原
料を高温下で焼成する場合、硫黄含有量が多い流体及び
微粉状燃料を用いても硫黄化合物含有量の極めて少ない
焼成品を、少ない燃料原単位で連続的に得ることができ
るという効果を得る。また本発明によれば、簡単な装置
で実施でき、また従来の焼成装置に送粉管を追加するだ
けでよいという利点も得る。As described above, according to the present invention, when the agglomerated raw material is fired at a high temperature, even if a fluid having a high sulfur content and a fine powder fuel are used, a fired product having a very low sulfur compound content is obtained. The effect of being able to obtain continuously with a small fuel consumption rate is obtained. Further, according to the present invention, there is an advantage that it can be carried out by a simple device and only a powder feeding pipe is added to the conventional baking device.
【図1】本発明の第一実施例を示す、軸線を含む面での
断面図である。FIG. 1 is a sectional view taken along a plane including an axis, showing a first embodiment of the present invention.
【図2】第二実施例装置を示す、軸線を含む面での断面
図である。FIG. 2 is a cross-sectional view showing a second embodiment device in a plane including an axis.
【図3】第三実施例装置を示す、軸線を含む面での断面
図である。FIG. 3 is a cross-sectional view showing a third embodiment device in a plane including an axis.
1 回転炉 3 加熱ガス送入管 6 予熱装置 8 炉床 13 堆積層 20,20A,20B 送粉管 1 rotary furnace 3 Heating gas inlet pipe 6 Preheating device 8 hearth 13 sedimentary layers 20, 20A, 20B powder transfer tube
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7,DB名) B01J 6/00 C04B 2/10 ─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. 7 , DB name) B01J 6/00 C04B 2/10
Claims (4)
て堆積層を形成する炉床を備える予熱装置と、該予熱装
置に連通して上記炉床から順次落下する原料を受け、回
転しつつ該原料を排出部に移動せしめる回転炉とを有
し、該回転炉の排出部には加熱ガスを回転炉内に送入す
る加熱ガス送入管が備えられていて、該加熱ガスが回転
炉から上記予熱装置に向け原料の流れに対して向流した
後に上記堆積層を貫流する焼成装置において、予熱装置
には炉床が鉛直線を中心に回転する水平面として形成さ
れ、上記回転炉内の空間から予熱装置内の空間までの空
間内でかつ炉床よりも下方の任意位置に、外部から脱硫
微粉体を噴霧する送粉管が設けられていることを特徴と
する脱硫焼成装置。1. A preheating device including a hearth that receives a granular material supplied from the outside to form a deposited layer, and a raw material that is in communication with the preheating device and that sequentially drops from the hearth and rotates. While having a rotary furnace for moving the raw material to the discharge part, the discharge part of the rotary furnace is provided with a heating gas feed pipe for feeding the heating gas into the rotary furnace, and the heating gas is rotated. in the sintering apparatus flowing through the deposition layer after flowing countercurrent to the flow of material toward the preheater from the furnace, the preheating device
The hearth is formed as a horizontal plane that rotates about a vertical line.
It is, at any position below the empty <br/> between the a and the hearth from the space of the rotary furnace until space in the preheater, and pollinators tube for spraying desulfurization fine powder externally provided A desulfurization and firing device characterized in that
られていることとする請求項1に記載の脱硫焼成装置。2. The desulfurization and firing device according to claim 1, wherein the powder feeding pipe is provided so as to face the flow of the heating gas.
間に設けられていることとする請求項1に記載の脱硫焼
成装置。Wherein Okukonakan is, desulfurization baking apparatus according to claim 1, characterized in that it has been kicked set in the communication space of the preheating device and the rotary furnace.
僅かに傾斜せる線を軸線として回転せる回転体として形
成され、送粉管が該回転体の内部空間に設けられている
こととする請求項1又は請求項2に記載の脱硫焼成装
置。4. A rotary furnace is formed as a rotary member to rotate the axis slightly inclined cell line with respect to the horizontal line or horizontal line, claims Okukonakan is to what is kicked set in the inner space of the rotary body The desulfurization firing apparatus according to claim 1 or 2.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP28549593A JP3420623B2 (en) | 1993-10-21 | 1993-10-21 | Desulfurization firing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP28549593A JP3420623B2 (en) | 1993-10-21 | 1993-10-21 | Desulfurization firing device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH07116498A JPH07116498A (en) | 1995-05-09 |
JP3420623B2 true JP3420623B2 (en) | 2003-06-30 |
Family
ID=17692267
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP28549593A Expired - Fee Related JP3420623B2 (en) | 1993-10-21 | 1993-10-21 | Desulfurization firing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3420623B2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3623016B2 (en) * | 1995-06-09 | 2005-02-23 | 株式会社チサキ | Vertical firing furnace |
KR100498098B1 (en) * | 2002-12-11 | 2005-07-01 | 주식회사 포스코 | An heating apparatus of rotary kiln |
-
1993
- 1993-10-21 JP JP28549593A patent/JP3420623B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH07116498A (en) | 1995-05-09 |
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