JPH09268013A - Production of fine powder slaked lime by utilizing fluidized bed - Google Patents
Production of fine powder slaked lime by utilizing fluidized bedInfo
- Publication number
- JPH09268013A JPH09268013A JP7723496A JP7723496A JPH09268013A JP H09268013 A JPH09268013 A JP H09268013A JP 7723496 A JP7723496 A JP 7723496A JP 7723496 A JP7723496 A JP 7723496A JP H09268013 A JPH09268013 A JP H09268013A
- Authority
- JP
- Japan
- Prior art keywords
- fluidized bed
- slaked lime
- particle size
- medium particles
- fine powder
- 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.)
- Withdrawn
Links
- 239000000843 powder Substances 0.000 title claims abstract description 52
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 title claims abstract description 42
- 239000000920 calcium hydroxide Substances 0.000 title claims abstract description 42
- 235000011116 calcium hydroxide Nutrition 0.000 title claims abstract description 42
- 229910001861 calcium hydroxide Inorganic materials 0.000 title claims abstract description 42
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 239000002245 particle Substances 0.000 claims abstract description 57
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000002002 slurry Substances 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 10
- 238000009826 distribution Methods 0.000 claims abstract description 7
- 239000004576 sand Substances 0.000 claims abstract description 6
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 5
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 90
- 239000000292 calcium oxide Substances 0.000 claims description 45
- 235000012255 calcium oxide Nutrition 0.000 claims description 45
- 239000000126 substance Substances 0.000 claims description 7
- 238000000926 separation method Methods 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims 1
- 238000001035 drying Methods 0.000 abstract description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 abstract description 2
- 235000011941 Tilia x europaea Nutrition 0.000 abstract description 2
- 230000018044 dehydration Effects 0.000 abstract description 2
- 239000004571 lime Substances 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- -1 for example Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 20
- 239000002994 raw material Substances 0.000 description 13
- 238000001354 calcination Methods 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 239000012717 electrostatic precipitator Substances 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 2
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000006114 decarboxylation reaction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000005243 fluidization Methods 0.000 description 1
- 239000011164 primary particle Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
Landscapes
- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、微細であって反応
性の高い、微粉末生石灰を、流動層を利用して製造する
方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing finely powdered quicklime, which is fine and highly reactive, using a fluidized bed.
【０００２】[0002]
【従来の技術】生石灰の種々の用途において、微細であ
って反応性の高いものが要求されることが多くなった。
たとえば、燃焼排ガスとくにゴミ焼却炉からのガス中
の塩化水素ガスの除去に使用されるものはその代表であ
る。 ＣａＯを主成分とするセラミックスの製造原料
や、製鋼の副資材として使用する生石灰も、微粉末で高
活性の製品は有用である。2. Description of the Related Art In various applications of quicklime, fine particles and highly reactive ones are often required.
Typical examples thereof include those used for removal of combustion exhaust gas, particularly hydrogen chloride gas in gas from a refuse incinerator. A fine powder and highly active product is also useful as a raw material for producing ceramics containing CaO as a main component and quicklime used as an auxiliary material for steelmaking.
【０００３】発明者らは、このような要求にこたえて微
粉末状の生石灰を製造する方法を確立すべく研究し、微
細な石灰石を高温に加熱された不活性物質の粒子からな
る流動層に供給し、そこで仮焼反応ＣａＣＯ3→ＣａＯ
＋ＣＯ2を行なうことによりこの目的が達成できること
を見出し、すでに開示した(特開平７−８９７４９号)。The inventors have studied to establish a method for producing a fine powder of quick lime in response to such demands, and have made fine limestone into a fluidized bed composed of particles of an inert substance heated to a high temperature. Supply, where calcination reaction CaCO 3 → CaO
We have found that this object can be achieved by carrying out + CO 2 and have already disclosed it (JP-A-7-89749).
【０００４】さらに研究を進めた結果、流動層に供給す
る原料として、石灰石に代えて消石灰を使用し、従って
脱炭酸反応でなく脱水反応Ｃａ（ＯＨ）2→ＣａＯ＋Ｈ2
Ｏを行なうことにより、やはり微粉末の生石灰が得られ
ることを確認した。 この原料消石灰としては、固体の
消石灰だけでなく水スラリーにしたものも使用できるこ
とがわかった。As a result of further research, slaked lime was used in place of limestone as a raw material to be supplied to the fluidized bed, so that dehydration reaction Ca (OH) 2 → CaO + H 2 was used instead of decarboxylation reaction.
It was confirmed that fine powder of quicklime was obtained by carrying out O. It was found that as the raw material slaked lime, not only solid slaked lime but also water slurry can be used.
【０００５】[0005]
【発明が解決しようとする課題】本発明の目的は、上記
の発明者らの知見を活用して、消石灰を原料とし流動層
を利用した、高活性の微粉末生石灰を製造する方法を提
供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a method for producing a highly active fine powder quicklime using a fluidized bed using slaked lime as a raw material, by utilizing the findings of the above inventors. Especially.
【０００６】[0006]
【課題を解決するための手段】本発明の微粉末生石灰の
製造方法のうち、消石灰粉末を原料とする場合は、不活
性物質の媒体粒子を高温の流動化ガスで流動化すること
により形成され、３５０〜８００℃の一定温度に保たれ
た流動層に、粒度が−１００μｍの微粉末状の消石灰を
供給し、媒体粒子の表面における消石灰の脱水反応によ
り生石灰を生成させ、媒体粒子の表面から離脱した生石
灰粉末を流動化ガスの流れにのせてとり出し、固・気分
離手段により回収することからなる流動層を利用した微
粉末生石灰の製造方法である。In the method for producing fine powder quicklime of the present invention, when slaked lime powder is used as a raw material, it is formed by fluidizing medium particles of an inert substance with a high temperature fluidizing gas. , To a fluidized bed kept at a constant temperature of 350 to 800 ° C., fine powder slaked lime having a particle size of −100 μm is supplied, and quick lime is generated by a dehydration reaction of the slaked lime on the surface of the medium particles. This is a method for producing finely powdered quick lime using a fluidized bed, in which the released quicklime powder is taken out on the flow of fluidizing gas and is recovered by a solid / gas separation means.
【０００７】本発明の微粉末生石灰の製造方法のうち、
消石灰粉末の水スラリーを原料とする態様は、不活性物
質の媒体粒子を高温の流動化ガスで流動化することによ
り形成され、３５０〜８００℃の温度に保たれた流動層
に、粒度が−５０μｍの微粉末状の消石灰を水に分散さ
せて得た水スラリーを供給し、媒体粒子の表面における
水スラリーの乾燥とそれに続く消石灰の脱水反応とによ
り生石灰を生成させ、媒体粒子の表面から離脱した生石
灰粉末を流動化ガスの流れにのせてとり出し、固・気分
離手段により回収することからなる流動層を利用した微
粉末生石灰の製造方法である。Among the methods for producing fine powder quicklime of the present invention,
The embodiment in which a water slurry of slaked lime powder is used as a raw material is formed by fluidizing medium particles of an inert substance with a high temperature fluidizing gas, and the particle size is − in a fluidized bed kept at a temperature of 350 to 800 ° C. A water slurry obtained by dispersing slaked lime in the form of fine powder of 50 μm in water is supplied, quick lime is generated by drying the water slurry on the surface of the medium particles and subsequent dehydration reaction of the slaked lime, and is separated from the surface of the medium particles. This is a method for producing finely powdered quick lime using a fluidized bed, in which the quick lime powder obtained is taken out on the flow of fluidizing gas and recovered by a solid / gas separation means.
【０００８】[0008]
【発明の実施態様】流動層を形成する媒体粒子として
は、粒度範囲が１００〜１５００μｍ、好ましくは４０
０〜１５００μｍであって、比較的粒径の揃っているも
の、具体的には、少なくとも９０％が平均粒径の±５０
％以内に入る粒度分布をもつものを使う。 それによっ
て、流動層の形成とコントロールが容易になる。BEST MODE FOR CARRYING OUT THE INVENTION The medium particles for forming a fluidized bed have a particle size range of 100 to 1500 μm, preferably 40.
0 to 1500 μm and having a relatively uniform particle size, specifically, at least 90% is ± 50 of the average particle size.
Use one with a particle size distribution that falls within%. This facilitates formation and control of the fluidized bed.
【０００９】媒体粒子を構成する物質は、熱的に安定で
原料の消石灰、生成する生石灰および水蒸気と反応しな
いものであれば、任意に選択できる。 実際上は、砂、
シリカサンド、アルミナ粉末などが好適である。The substance constituting the medium particles can be arbitrarily selected as long as it is thermally stable and does not react with the raw material slaked lime, the produced quick lime and steam. In fact, sand,
Silica sand and alumina powder are suitable.
【００１０】流動化ガスは、流動層の媒体粒子を消石灰
の脱水反応が起る少なくとも３５０℃以上の温度に維持
することができる温度でなければならず、かつＣＯ2 を
実質上含有しない（０．０３vol.％以下）ことが要求さ
れる。 実用上は空気を加熱して使用すればよい。The fluidizing gas must be at a temperature capable of maintaining the medium particles of the fluidized bed at a temperature of at least 350 ° C. at which the dehydration reaction of slaked lime occurs, and is substantially free of CO 2 (0 0.03 vol.% Or less) is required. In practice, air may be heated before use.
【００１１】媒体粒子の流動化は、その粒子表面に付着
している生石灰が剥離しやすく、かつ剥離のときに細粒
化されるよう、激しく撹拌され粒子相互が衝突する機会
が多くなるような流動状態であることが望ましい。 こ
れは、流動する媒体粒子を流動化させる力が、垂直方向
だけでなく水平方向の分力もかなり大きくなるように、
流動化ガスを供給することによって実現する。The fluidization of the medium particles is such that the quick lime adhering to the surface of the particles is easily separated, and the particles are often vigorously stirred to collide with each other so that the particles are finely divided at the time of separation. It is desirable to be in a fluid state. This is because the force that fluidizes the flowing medium particles is considerably large not only in the vertical direction but also in the horizontal direction.
It is realized by supplying fluidizing gas.
【００１２】固・気分離手段には、常用のサイクロン、
バグフィルターおよび電気集塵器からえらんだものを１
種または２種以上組み合わせて使用すればよい。 サイ
クロンは効率的であるが、極微粉は捕集しきれないか
ら、これにバグフィルターまたは電気集塵器を組み合わ
せた構成が実用的である。The solid / gas separation means is a conventional cyclone,
1 selected from bag filter and electrostatic precipitator
They may be used alone or in combination of two or more. Cyclone is efficient, but it cannot collect ultrafine powder, so it is practical to combine it with a bag filter or an electrostatic precipitator.
【００１３】流動層に供給された消石灰の粉末または供
給された消石灰スラリーが乾燥して生成した消石灰の粉
末は、媒体粒子の表面に付着して流動化されるので、流
動層全体へ分散し、そこで媒体粒子および流動化ガスか
ら脱水に必要な熱を受ける。消石灰粉末は流動層全体に
わたり一次粒子の形で存在するから、消石灰粉末への熱
の移動は速やかであって、脱水反応は速やかに起る。The slaked lime powder supplied to the fluidized bed or the slaked lime powder produced by drying the supplied slaked lime slurry adheres to the surface of the medium particles and is fluidized, so that it is dispersed throughout the fluidized bed, There, the heat required for dehydration is received from the medium particles and the fluidizing gas. Since the slaked lime powder exists in the form of primary particles throughout the fluidized bed, the heat transfer to the slaked lime powder is rapid and the dehydration reaction occurs quickly.
【００１４】[0014]
【実施例】図１に示す構成の実験装置を組み立てた。
装置の主要部は、媒体粒子の流動層（１）を内部に形成
する流動焼成塔（２）と、この流動層に消石灰の粉末
(Ｍ)を供給するための粉末供給機（３）から成る。 流
動焼成塔（２）は内径５cmのシリカチューブであって、
ヒーター（４）で周囲から加熱され、その底部へコンプ
レッサー（５）で加圧されオイルフィルター（６）、オ
リフィス流量計（７）を通った空気が供給され、分散板
（１１）上の媒体粒子を流動させる。 流動化ガス流は
バグフィルター（８）へ導かれ、そこで製品の微粉末生
石灰（Ｐ）を分離して外部へ放出される。 粉末供給機
は、粉末を充填した槽内を、上端に横方向のガス吹出口
を有するパイプが下降しながらガス（空気）を吹き出し
て粉末を吹き上げ、ガス流とともに粉末を上部からとり
出す構造のものである。 消石灰粉末に代えて消石灰の
水スラリーを供給する場合には、上記の粉末供給機
（３）に代えて、スラリー注入機（図示してない）を使
用する。Example An experimental apparatus having the configuration shown in FIG. 1 was assembled.
The main part of the apparatus is a fluidized calcination tower (2) in which a fluidized bed (1) of medium particles is formed, and a slaked lime powder in this fluidized bed.
It consists of a powder feeder (3) for feeding (M). The fluidized firing tower (2) is a silica tube with an inner diameter of 5 cm,
Air heated by the heater (4) from the surroundings and pressurized by the compressor (5) to the bottom of the heater is supplied with air that has passed through the oil filter (6) and the orifice flow meter (7), and the medium particles on the dispersion plate (11). To flow. The fluidizing gas stream is led to the bag filter (8), where the finely powdered quicklime (P) of the product is separated and released to the outside. The powder feeder has a structure in which a pipe having a gas outlet in the horizontal direction at the upper end descends in a tank filled with powder, blows out gas (air) and blows up the powder, and takes out the powder from the upper part together with the gas flow. It is a thing. When the water slurry of slaked lime is supplied instead of the slaked lime powder, a slurry injecting machine (not shown) is used in place of the powder supplying machine (3).
【００１５】〔実施例１〕平均粒径７００μｍで、９０
％がその±５０％以内にある粒径分布を有するシリカサ
ンドを媒体粒子として使用し、流動焼成塔（２）内に静
止層高さが１０cmになるまで投入した。 ヒーターに通
電して加熱し、媒体粒子の温度が４５０℃に高まったと
ころで、空筒基準ガス速度１ｍ/secで空気を流通させ、
媒体粒子を流動化させた。 続いて粉末供給機（３）か
ら、平均粒径７μｍの消石灰粉末を２５ｇ／hrの速度で
供給し、バグフィルター（８）で生成した生石灰微粉末
を捕集した。Example 1 An average particle size of 700 μm and 90
Silica sand having a particle size distribution of% within ± 50% thereof was used as a medium particle, and charged into the fluidized-fired tower (2) until the height of the stationary layer became 10 cm. When the heater is energized to heat and the temperature of the medium particles rises to 450 ° C., air is circulated at an empty cylinder reference gas velocity of 1 m / sec,
The media particles were fluidized. Then, from the powder feeder (3), slaked lime powder having an average particle size of 7 μm was fed at a rate of 25 g / hr, and the quicklime fine powder produced by the bag filter (8) was collected.
【００１６】原料の消石灰と得られた生石灰の分析値
を、下に示す。The analytical values of the raw slaked lime and the obtained quick lime are shown below.
【００１７】 灼熱減量 ＣａＯ ＭｇＯ ＣＯ2 （％） 原料消石灰 ２５.４３ ７３.３１ ０.３５ １.２６ 製品生石灰 ２.１５ ９６.７０ ０.４７ １.５３ 製品生石灰は、平均粒径７μｍであった。 Loss on ignition CaO MgO CO 2 (%) Raw material slaked lime 25.43 73.31 0.35 1.26 Product quicklime 2.15 96.70 0.47 1.53 Product quicklime has an average particle size of 7 μm. It was
【００１８】〔実施例２〕媒体粒子として、平均粒径が
５５０μｍで、９０％が±５０％以内にある粒度分布を
もつ川砂を使用し、静止層高さが２０cmになるように流
動焼成塔に投入した。実施例１と同様に、媒体粒子が温
度３５０℃になるように加熱し、空筒基準ガス速度０．
８ｍ/secで空気を送って流動層を形成し、そこへ、平均
粒径５μｍの消石灰粉末を水に分散させて含水率１．５
（kg水／kg乾燥粉末）のスラリーにしたものを、２０ｇ
／hrの速度で供給した。Example 2 As the medium particles, river sand having an average particle size of 550 μm and a particle size distribution of 90% within ± 50% was used, and the fluidized bed calcining tower so that the height of the stationary layer was 20 cm. I put it in. In the same manner as in Example 1, the medium particles were heated to a temperature of 350 ° C., and the empty cylinder reference gas velocity was 0.
Air is sent at 8 m / sec to form a fluidized bed, and slaked lime powder having an average particle size of 5 μm is dispersed in water to have a water content of 1.5.
20 g of a slurry of (kg water / kg dry powder)
It was fed at a rate of / hr.
【００１９】スラリー原料の消石灰とバグフィルターに
捕集された製品生石灰の粉末との分析値を比較して、下
に示す。The analytical values of the slaked lime as the slurry raw material and the powder of the product quicklime collected in the bag filter are compared and shown below.
【００２０】 灼熱減量 ＣａＯ ＭｇＯ ＣＯ2 （％） 原料消石灰 ２５.３７ ７３.８５ ０.４１ １.３３ 製品生石灰 ２.０７ ９６.７６ ０.５８ １.４１ 製品生石灰は、平均粒径５μｍであった。 Loss on ignition CaO MgO CO 2 (%) Raw material Slaked lime 25.37 73.85 0.41 1.33 Product quicklime 2.07 96.76 0.58 1.41 Product quicklime has an average particle size of 5 μm. It was
【００２１】この結果から、消石灰の水スラリーを原料
として使用したときは、水中に分散していた消石灰粉末
に由来する生石灰に加えて、いったん水に溶解した消石
灰から乾燥−脱水の過程を経て生成する生石灰粉末もあ
るためか、粒度分布に幅が出ることが認められた。From these results, when a water slurry of slaked lime was used as a raw material, in addition to quick lime derived from slaked lime powder dispersed in water, it was formed from slaked lime once dissolved in water through a process of drying-dehydration. It was confirmed that there is a wide range in the particle size distribution, probably because some quicklime powder is present.
【００２２】[0022]
【発明の効果】本発明の方法に従って微粉末消石灰また
は微粉末消石灰のスラリーから微粉末生石灰を製造する
と、原料のもっていた粒度がほぼ維持されるような、微
細な粒度の生石灰が得られる。 このような微細な生石
灰粉末は活性が高く、ＨＣｌやＳＯｘのようなガス中の
有害物質の除去に使用したときに、高い反応効率を示し
て有用である。When fine powder quicklime is produced from fine powdered slaked lime or a slurry of fine powdered slaked lime according to the method of the present invention, quicklime having a fine particle size such that the grain size of the raw material is almost maintained can be obtained. Such fine lime powder has high activity and is useful because it exhibits high reaction efficiency when used for removing harmful substances in gases such as HCl and SOx.
【図１】 本発明の微粉末生石灰の製造方法を実施する
ための、実験的な装置の構成を示す概念的な縦断面図。FIG. 1 is a conceptual vertical cross-sectional view showing the configuration of an experimental apparatus for carrying out the method for producing fine powder quicklime of the present invention.
１ 流動層 １１ 分散板 ２ 流動焼成塔 ３ 粉末供給機 ４ ヒーター ５ コンプレッサー ６ オイルフィルター ７ 流量計 ８ バグフィルター Ｍ 消石灰粉末（原料） Ｐ 生石灰粉末（製品） DESCRIPTION OF SYMBOLS 1 Fluidized bed 11 Dispersion plate 2 Fluidized firing tower 3 Powder feeder 4 Heater 5 Compressor 6 Oil filter 7 Flow meter 8 Bag filter M Slaked lime powder (raw material) P Quick lime powder (product)
───────────────────────────────────────────────────── フロントページの続き (72)発明者 羽根田 寛 栃木県安蘇郡葛生町中央東３−７−９ Ａ −105 (72)発明者 鶴永 賢 東京都北区志茂５−33−２ ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Haneda 3-7-9 Chuohigashi, Kuzuu-cho, Ansu-gun, Tochigi Prefecture A-105 (72) Inventor Ken Tsurunaga 5-33-2 Shimo Kita-ku, Tokyo
Claims (5)
スで流動化することにより形成され、３５０〜８００℃
の一定温度に保たれた流動層に、粒度が−１００μｍの
微粉末状の消石灰を供給し、媒体粒子の表面における消
石灰の脱水反応により生石灰を生成させ、媒体粒子の表
面から離脱した生石灰粉末を流動化ガスの流れにのせて
とり出し、固・気分離手段により回収することからなる
流動層を利用した微粉末生石灰の製造方法。1. Formed by fluidizing medium particles of an inert substance with a fluidizing gas at a high temperature, 350 to 800 ° C.
In the fluidized bed kept at a constant temperature of, a fine powder slaked lime having a particle size of −100 μm is supplied, quick lime is generated by a dehydration reaction of the slaked lime on the surface of the medium particles, and the quick lime powder separated from the surface of the medium particles is removed. A method for producing fine powder quicklime using a fluidized bed, which is taken out along with the flow of fluidizing gas and recovered by a solid / gas separation means.
スで流動化することにより形成され、３５０〜８００℃
の一定温度に保たれた流動層に、粒度が−５０μｍの微
粉末状の消石灰を水に分散させて得た水スラリーを供給
し、媒体粒子の表面における水スラリーの乾燥とそれに
続く消石灰の脱水反応とにより生石灰を生成させ、媒体
粒子の表面から離脱した生石灰粉末を流動化ガスの流れ
にのせてとり出し、固・気分離手段により回収すること
からなる流動層を利用した微粉末生石灰の製造方法。2. Formed by fluidizing medium particles of an inert substance with a fluidizing gas at a high temperature, 350-800 ° C.
The water slurry obtained by dispersing fine powder slaked lime having a particle size of −50 μm in water is supplied to the fluidized bed kept at a constant temperature of 2 to dry the water slurry on the surface of the medium particles and subsequently dehydrate slaked lime. Production of fine powder quicklime using a fluidized bed, which produces quicklime by reaction and removes quicklime powder separated from the surface of medium particles on the flow of fluidizing gas and collects it by solid-gas separation means. Method.
５００μｍであって、その少なくとも９０％が平均粒径
の±５０％以内に入る粒度分布をもつものを使用する請
求項１または２の微粉末生石灰の製造方法。3. A medium particle having a particle size range of 100 to 1
3. The method for producing finely powdered quick lime according to claim 1, wherein the particle size distribution is 500 μm, and at least 90% of which has a particle size distribution within ± 50% of the average particle size.
アルミナ粉末を使用する請求項１または２の微粉末生石
灰の製造方法。4. The method for producing fine powder quicklime according to claim 1, wherein sand, silica powder or alumina powder is used as the medium particles.
助長され、媒体粒子表面に付着している生石灰の細粉化
および離脱を容易にする激しい撹拌条件下に行なう請求
項１または２の微粉末生石灰の製造方法。5. A fluidized bed is formed under vigorous stirring conditions in which collision of medium particles with each other is promoted and quick lime adhering to the surface of the medium particles is easily pulverized and separated. Method for producing fine powder quicklime of the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7723496A JPH09268013A (en) | 1996-03-29 | 1996-03-29 | Production of fine powder slaked lime by utilizing fluidized bed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7723496A JPH09268013A (en) | 1996-03-29 | 1996-03-29 | Production of fine powder slaked lime by utilizing fluidized bed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09268013A true JPH09268013A (en) | 1997-10-14 |
Family
ID=13628184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7723496A Withdrawn JPH09268013A (en) | 1996-03-29 | 1996-03-29 | Production of fine powder slaked lime by utilizing fluidized bed |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09268013A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006021945A (en) * | 2004-07-07 | 2006-01-26 | Yoshizawa Lime Industry | Highly reactive quick lime and its manufacturing method |
| JP2011235218A (en) * | 2010-05-07 | 2011-11-24 | Omega:Kk | Method for treating water-containing waste |
| WO2017150426A1 (en) * | 2016-02-29 | 2017-09-08 | 宇部マテリアルズ株式会社 | Calcium oxide powder and adsorbent, and method for producing calcium oxide powder |
-
1996
- 1996-03-29 JP JP7723496A patent/JPH09268013A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006021945A (en) * | 2004-07-07 | 2006-01-26 | Yoshizawa Lime Industry | Highly reactive quick lime and its manufacturing method |
| JP2011235218A (en) * | 2010-05-07 | 2011-11-24 | Omega:Kk | Method for treating water-containing waste |
| WO2017150426A1 (en) * | 2016-02-29 | 2017-09-08 | 宇部マテリアルズ株式会社 | Calcium oxide powder and adsorbent, and method for producing calcium oxide powder |
| JPWO2017150426A1 (en) * | 2016-02-29 | 2018-12-20 | 宇部マテリアルズ株式会社 | Calcium oxide powder, adsorbent and method for producing calcium oxide powder |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US2650084A (en) | Calcining lime bearing sludges | |
| US3856441A (en) | Apparatus for pelletizing powdered solid substance in a fluidized bed | |
| US4668489A (en) | Method for treating gas streams | |
| US5205350A (en) | Process for cooling a hot process gas | |
| KR20050091749A (en) | Method and plant for removing gaseous pollutants from exhaust gases | |
| JPH0318923B2 (en) | ||
| US2511088A (en) | Process for pelleting carbon black | |
| EP0164192B1 (en) | Method and reactor for treating by-products from flue gas desulfurization | |
| JPS59166229A (en) | Method and device for removing sulfur dioxide from hot flue gas | |
| US5580002A (en) | Method and apparatus for heating and grinding materials | |
| JP2548519B2 (en) | Fluidized bed classifier | |
| US5919038A (en) | Method for the calcination of calcium carbonate bearing materials | |
| JPH0515900A (en) | Method and device for drying water-containing sludge | |
| CA2510791A1 (en) | Method and plant for the conveyance of fine-grained solids | |
| JPH09268013A (en) | Production of fine powder slaked lime by utilizing fluidized bed | |
| US4542000A (en) | Method for treating gas streams | |
| US3964922A (en) | Process for calcination of cement-clinker | |
| JPH09268012A (en) | Production of fine powder slaked lime by utilizing fluidized bed | |
| US5997823A (en) | Processes and apparatus for removing acid gases from flue gas | |
| CN85106397A (en) | Light-burned processing method of magnesite gas suspension and device thereof | |
| GB1581672A (en) | Fluidised bed combustion | |
| JPH05500024A (en) | Method for reducing wear of nozzles or other delivery means | |
| US5122348A (en) | Method of slurrying partially calcined alumina dust | |
| JP4051857B2 (en) | Method for producing finely powdered calcium carbonate | |
| US5653948A (en) | Method for calcining fine limestone powder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20030603 |