JPH11226541A - Apparatus for producing molten spheroidized material from sludge incineration ash - Google Patents

Apparatus for producing molten spheroidized material from sludge incineration ash

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Publication number
JPH11226541A
JPH11226541A JP3648998A JP3648998A JPH11226541A JP H11226541 A JPH11226541 A JP H11226541A JP 3648998 A JP3648998 A JP 3648998A JP 3648998 A JP3648998 A JP 3648998A JP H11226541 A JPH11226541 A JP H11226541A
Authority
JP
Japan
Prior art keywords
incineration ash
molten
sludge incineration
furnace
flame
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.)
Granted
Application number
JP3648998A
Other languages
Japanese (ja)
Other versions
JP3659788B2 (en
Inventor
Mitsuo Tazaki
光雄 田崎
Yasushi Terao
康 寺尾
Osamu Yokota
修 横田
Mitsuyoshi Matsukawa
満兆 松川
Akio Takasumi
章夫 高角
Koji Sakata
晃治 坂田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kubota Corp
Original Assignee
Kubota Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kubota Corp filed Critical Kubota Corp
Priority to JP3648998A priority Critical patent/JP3659788B2/en
Publication of JPH11226541A publication Critical patent/JPH11226541A/en
Application granted granted Critical
Publication of JP3659788B2 publication Critical patent/JP3659788B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Abstract

PROBLEM TO BE SOLVED: To produce a safe molten-spheroidized material having strength applicable as a powdery material such as a concrete additive and fluidity efficiently from sludge incineration ash. SOLUTION: An apparatus for producing a molten-spheroidized material from sludge incineration ash is equipped with an air burner 9, a melting- spheroidizing furnace 1, a high temperature cyclone 2 into which a high temperature exhaust gas containing the molten-spheroidized material discharged from the furnace 1 is introduced in turn, and a high temperature bag filter 3. In this way, the spherical uniform molten/spheroidized material can be produced in the furnace 1 and separated and recovered without adhesion of selenium and arsenic in the furnace 1, and suspended substances such as the fine molten- spheroidized material, selenium, arsenic, and dioxin which pass through the cyclone 2 can be separated and recovered by the bag filter 3.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、下水汚泥焼却灰な
どの汚泥焼却灰からの溶融球状化物製造装置に関する。The present invention relates to an apparatus for producing molten spheroids from sludge incineration ash such as sewage sludge incineration ash.

【０００２】[0002]

【従来の技術】従来、下水汚泥などの汚泥は焼却し、発
生した焼却灰を埋立て処分することが多かった。しかし
近年では、埋立て処分地不足などの制約から、焼却灰の
有効利用および焼却灰を溶融して得られる溶融スラグの
有効利用が図られている。焼却灰の有効利用法として
は、土質改良材、路盤材、タイル、透水性ブロックなど
への利用が挙げられる。焼却灰の溶融により生成される
溶融スラグも、路盤材、コンクリート骨材としての利
用、あるいはタイルなどへの利用が検討されている。2. Description of the Related Art Conventionally, sludge such as sewage sludge has often been incinerated, and generated incineration ash has often been landfilled. However, in recent years, due to constraints such as a shortage of landfill sites, effective use of incinerated ash and effective use of molten slag obtained by melting incinerated ash have been attempted. Examples of the effective use of incinerated ash include use of soil improvement materials, roadbed materials, tiles, and permeable blocks. Molten slag generated by melting incineration ash is also being considered for use as roadbed material, concrete aggregate, or for tiles.

【０００３】[0003]

【発明が解決しようとする課題】しかしながら、汚泥焼
却灰の有効利用を図るに際しては、汚泥焼却灰中に含ま
れる重金属類が溶出したり、焼却灰をコンクリートの混
和材等、他の粉体材料の代替として使用した場合に十分
な強度が得られないなど、未解決の課題を多く抱えてい
る。However, when the sludge incineration ash is to be used effectively, heavy metals contained in the sludge incineration ash are eluted or the incineration ash is converted into another powder material such as a concrete admixture. There are many unsolved issues such as insufficient strength when used as a substitute for

【０００４】一方、溶融スラグは、重金属類がスラグ内
部に封じ込められるため溶出特性に優れているが、通
常、数ｍｍ〜数十ｍｍ程度の塊状であり、粉体として利
用するためには粉砕、分級等の後工程を要するだけでな
く、強度の問題は依然として残る。[0004] On the other hand, molten slag has excellent elution characteristics because heavy metals are contained in the slag. However, it is usually a lump of several mm to several tens of mm. Not only a post-process such as classification is required, but the problem of strength still remains.

【０００５】そこで、下水汚泥焼却灰と主要成分（Ｓ
ｉ，Ａｌ，Ｃａ)の組成および粒径（数十マイクロメー
トル）が類似していながら、コンクリートの混和材とし
て使用されているフライアッシュとの相違に着目して、
不定形な汚泥焼却灰をフライアッシュのような溶融球状
化物にすることが検討された。しかし、これまでは、炉
内温度を汚泥焼却灰の溶融温度以上に維持するか、ある
いは酸素バーナの高温の火炎に接触させることによって
汚泥焼却灰を溶融させていたため、エネルギーロスが大
きく、コスト高につながるという問題があった。Therefore, sewage sludge incineration ash and main components (S
Focusing on the difference from fly ash used as an admixture for concrete, although the composition and particle size (i, Al, Ca) are similar,
A study was made to transform amorphous sludge incineration ash into molten spheroids such as fly ash. However, in the past, sludge incineration ash was melted by maintaining the furnace temperature above the melting temperature of the sludge incineration ash, or by contacting it with the high-temperature flame of an oxygen burner, resulting in a large energy loss and high cost. There was a problem that leads to.

【０００６】本発明は上記問題を解決するもので、汚泥
焼却灰から、コンクリート混和材などの粉体材料として
利用可能な強度や流動性を有し、かつ安全な溶融球状化
物を効率よく製造することを目的とするものである。The present invention solves the above-mentioned problems, and efficiently produces a safe molten spheroidized material having strength and fluidity usable as a powder material such as a concrete admixture from sludge incineration ash. The purpose is to do so.

【０００７】[0007]

【課題を解決するための手段】上記問題を解決するため
に、本発明の請求項１記載の汚泥焼却灰からの溶融球状
化物製造装置は、汚泥焼却灰を導入して溶融球状化物と
なす溶融球状化炉と、前記溶融球状化炉より流出する溶
融球状化物を含んだ高温の排ガスを導入して溶融球状化
物を分離回収する高温サイクロンと、前記高温サイクロ
ンより流出する高温の排ガスを導入して微細な浮遊物を
分離回収する高温バグフィルタとを備え、前記溶融球状
化炉は、一端部に設けられて火炎を前方へ噴射する空気
バーナと、空気バーナのノズル口の近傍に設けられて、
汚泥焼却灰を空気バーナの火炎中に火炎が噴射される方
向に沿って噴出する焼却灰噴出手段と、空気バーナの火
炎を通過した汚泥焼却灰が浮遊して冷却固化する冷却空
間とを有した構成としたことを特徴とする。ここで、空
気バーナは、燃料の燃焼用酸素含有気体として通常の空
気を用いるバーナをいう。In order to solve the above-mentioned problem, the apparatus for producing a molten spheroidized product from sludge incineration ash according to the first aspect of the present invention provides a method for introducing sludge incineration ash to form a molten spheroidized product. A spheroidizing furnace, a high-temperature cyclone for separating and recovering a molten spheroidized product by introducing a high-temperature exhaust gas containing a molten spheroidized product flowing from the melting spheroidizing furnace, and introducing a high-temperature exhaust gas flowing from the high-temperature cyclone. A high-temperature bag filter for separating and recovering fine suspended matter is provided, and the melting spheroidizing furnace is provided at one end and an air burner that injects a flame forward, and is provided near a nozzle port of the air burner,
It had incineration ash ejection means for ejecting the sludge incineration ash in the direction of the flame in the flame of the air burner, and a cooling space in which the sludge incineration ash that passed through the flame of the air burner floated and was cooled and solidified. It is characterized by having comprised. Here, the air burner refers to a burner that uses normal air as the oxygen-containing gas for combustion of fuel.

【０００８】請求項２記載の汚泥焼却灰からの溶融球状
化物製造装置は、溶融球状化炉を、空気バーナの火炎に
沿う炉壁を水冷壁として構成したことを特徴とする。請
求項３記載の汚泥焼却灰からの溶融球状化物製造装置
は、溶融球状化炉が、溶融球状化した汚泥焼却灰の各粒
子を冷却する冷却空気もしくは噴霧冷却水などの冷却媒
体を供給する冷却媒体供給手段を有したことを特徴とす
る。According to a second aspect of the present invention, there is provided an apparatus for producing a molten spheroidized product from sludge incineration ash, wherein the melting spheroidizing furnace is configured such that a furnace wall along a flame of an air burner is a water-cooled wall. In the apparatus for producing a molten spheroidized product from sludge incineration ash according to claim 3, the melt spheroidizing furnace supplies cooling medium such as cooling air or spray cooling water for cooling each particle of the molten spheroidized sludge incineration ash. It is characterized by having a medium supply means.

【０００９】上記した請求項１記載の構成において、焼
却灰噴出手段により汚泥焼却灰を噴出すると、汚泥焼却
灰の各粒子は空気バーナの火炎中を火炎が噴射される方
向に沿って通過し、その間に速やかに溶融し、表面張力
によって球状化し、冷却空間を浮遊する間に冷却固化し
て安定な溶融球状化物となる。In the above construction, when the sludge incineration ash is ejected by the incineration ash ejection means, each particle of the sludge incineration ash passes through the flame of the air burner along the direction in which the flame is ejected, In the meantime, it melts quickly, becomes spherical by surface tension, and solidifies by cooling while floating in the cooling space, and becomes a stable molten spherical product.

【００１０】このとき、汚泥焼却灰の各粒子は、火炎の
中を火炎が噴射される方向に沿って通過することで火炎
との接触時間が長くなるため、酸素バーナ等に比べると
火炎温度が低い空気バーナであっても確実に溶融し、球
形状がよく、均質な溶融球状化物となる。At this time, since each particle of the sludge incineration ash passes through the flame in the direction in which the flame is jetted, the contact time with the flame becomes longer, so that the flame temperature is lower than that of an oxygen burner or the like. Even a low air burner is reliably melted, has a good spherical shape, and becomes a homogeneous molten spheroid.

【００１１】生成した溶融球状化物は高温の排ガスに伴
われて溶融球状化炉から流出するので、流出した高温の
排ガスを直接高温サイクロンの内部に導入して溶融球状
化物を分離回収する。これにより、排ガス温度が低い時
に溶融球状化物の表面に凝縮して付着し易いセレンやヒ
素の付着を防止できる。Since the generated molten spheroids flow out of the melting spheroidizing furnace together with the high-temperature exhaust gas, the discharged high-temperature exhaust gas is directly introduced into the high-temperature cyclone to separate and collect the molten spheroid. Thereby, it is possible to prevent selenium or arsenic from being easily condensed and adhered to the surface of the molten spheroid when the exhaust gas temperature is low.

【００１２】高温サイクロンから出た高温の排ガスは高
温バグフィルタに導入し、微細な溶融球状化物、セレ
ン、ヒ素などの浮遊物を分離してから、別途設けた排ガ
ス処理装置に導く。The high-temperature exhaust gas discharged from the high-temperature cyclone is introduced into a high-temperature bag filter to separate fine suspended particles such as spheroids, selenium, and arsenic, and then lead to a separately provided exhaust gas treatment device.

【００１３】請求項２記載の構成によれば、溶融球状化
した汚泥焼却灰の各粒子が浮遊する間に炉壁に接触して
も、壁面が水冷された状態なので付着することはなく、
溶融球状化物を高い収率で得ることができる。According to the second aspect of the present invention, even if the particles of the molten spheroidized sludge incineration ash come in contact with the furnace wall while floating, they do not adhere because the wall is in a water-cooled state.
A molten spheroid can be obtained in a high yield.

【００１４】請求項３記載の構成によれば、溶融球状化
した汚泥焼却灰の各粒子を冷却媒体によって速やかに冷
却できるので、炉の冷却空間を短くできる。According to the third aspect of the present invention, each particle of the molten spheroidized sludge incineration ash can be rapidly cooled by the cooling medium, so that the cooling space of the furnace can be shortened.

【００１５】[0015]

【発明の実施の形態】以下、本発明の実施の形態を図面
を参照しながら説明する。図１において、１は流動層炉
や循環流動層炉などの流動層式焼却炉（図示せず）から
の下水汚泥焼却灰（以下、焼却灰という）を溶融球状化
する縦型の溶融球状化炉であり、後段に、この炉１より
排ガスに伴われて流出する溶融球状化物などの浮遊物を
回収する高温サイクロン２と高温バグフィルタ３とが設
置されている。高温バグフィルタ３のさらに後段には、
ブロワ４より溶融球状化炉１へ送られる空気を排ガスと
の熱交換によって加熱する空気予熱器５と誘引ブロワ６
とが設けられている。高温サイクロン２の下方には貯溜
槽７が設けられている。Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a vertical melt spheroidization for melting and spheroidizing sewage sludge incineration ash (hereinafter referred to as incineration ash) from a fluidized bed incinerator (not shown) such as a fluidized bed furnace or a circulating fluidized bed furnace. A high-temperature cyclone 2 and a high-temperature bag filter 3 for collecting suspended matters such as molten spheroids flowing out of the furnace 1 with the exhaust gas from the furnace 1 are provided at a latter stage. Further downstream of the high temperature bag filter 3,
An air preheater 5 that heats air sent from the blower 4 to the melting sphering furnace 1 by heat exchange with exhaust gas, and an induction blower 6
Are provided. A storage tank 7 is provided below the high-temperature cyclone 2.

【００１６】溶融球状化炉１の炉体８は縦長のほぼ円筒
状に形成されており、炉体８の上端部に空気バーナ９が
設けられ、下部に炉出口８ａが形成され、炉体８内の下
部が冷却空間１０とされている。炉体８には、冷却空間
１０に冷却空気を吹き込むブロワ１１が連通しており、
ブロワ１１の連通位置より上方の炉壁は、二重構造の内
部を冷却水が循環する水冷壁１２とされている。The furnace body 8 of the melting spheroidizing furnace 1 is formed in a vertically elongated substantially cylindrical shape, an air burner 9 is provided at an upper end of the furnace body 8, a furnace outlet 8a is formed at a lower part, and a furnace body 8 is provided. The lower part inside is a cooling space 10. A blower 11 for blowing cooling air into a cooling space 10 communicates with the furnace body 8.
The furnace wall above the communication position of the blower 11 is a water cooling wall 12 through which cooling water circulates inside the double structure.

【００１７】炉体８の上端部は詳細には図２に示したよ
うに構成されており、炉体８の内部に貫入して外管１３
が設けられ、外管１３の内側に所定間隔をおいて内管１
４が設けられ、内管１４の内側に空気供給管１５とＬＰ
Ｇなどの燃料を供給する燃料供給管１６とが同心状に設
けられており、これら内管１４と空気供給管１５と燃料
供給管１６とで空気バーナ９を構成している。The upper end of the furnace body 8 is configured in detail as shown in FIG.
Are provided inside the outer tube 13 at a predetermined interval.
4 and an air supply pipe 15 and LP inside the inner pipe 14.
A fuel supply pipe 16 for supplying a fuel such as G is provided concentrically. The inner pipe 14, the air supply pipe 15, and the fuel supply pipe 16 constitute an air burner 9.

【００１８】炉体８の上部に形成された接続口８ａに
は、二次燃焼空気供給管１７が流量弁１８を介して接続
していて、炉体８と外管１３との間隙に二次燃焼空気が
供給されるようになっている。外管１３の炉外部分に形
成された接続口１３ａには、搬送空気によって焼却灰を
送入する焼却灰供給管１９が接続していて、外管１３と
内管１４との間隙に焼却灰が供給されるようになってい
る。空気供給管１５の上部に形成された接続口１５ａに
は、一次燃焼空気供給管２０が流量弁２１を介して接続
している。A secondary combustion air supply pipe 17 is connected via a flow valve 18 to a connection port 8a formed in the upper part of the furnace body 8, and a secondary combustion air supply pipe 17 is connected to a gap between the furnace body 8 and the outer pipe 13 by a secondary combustion air supply pipe. Combustion air is supplied. An incineration ash supply pipe 19 for feeding incineration ash by carrier air is connected to a connection port 13 a formed in the outer part of the outer tube 13, and an incineration ash is provided in a gap between the outer tube 13 and the inner tube 14. Is supplied. A primary combustion air supply pipe 20 is connected via a flow valve 21 to a connection port 15 a formed at an upper portion of the air supply pipe 15.

【００１９】空気供給管１５と燃料供給管１６の各下端
は内管１４の下端より上方に位置していて、燃料供給管
１６内に送給される燃料が空気供給管１５より噴出する
空気と合流して燃焼し、その火炎２２がノズル口、すな
わち内管１４の先端部で規制されて下方へ延びるように
なっている。The lower ends of the air supply pipe 15 and the fuel supply pipe 16 are located above the lower end of the inner pipe 14, and the fuel supplied into the fuel supply pipe 16 is supplied with air ejected from the air supply pipe 15. The flame 22 is joined and burns, and the flame 22 is restricted by the nozzle port, that is, the tip of the inner pipe 14, and extends downward.

【００２０】高温サイクロン２は約１０００℃以上、高
温バグフィルタ３は約８００℃以上の高温に耐える材料
で構成されている。上記した構成における作用を説明す
る。The high-temperature cyclone 2 is made of a material that can withstand a high temperature of about 1000 ° C. or more, and the high-temperature bag filter 3 is made of a material that can withstand a high temperature of about 800 ° C. or more. The operation of the above configuration will be described.

【００２１】空気バーナ９より上記したような火炎２２
を噴射し、焼却灰供給管１９を通じて外管１３と内管１
４との間隙へ焼却灰を送入すると、焼却灰の各粒子は外
管１３，内管１４の先端部より下方へ噴出して、火炎２
２の中をその噴射される方向に沿って通過し、それによ
り速やかにかつ確実に溶融し、表面張力により球状化す
る。The flame 22 as described above is sent from the air burner 9.
And the outer pipe 13 and the inner pipe 1 are incinerated through the incineration ash supply pipe 19.
When the incinerated ash is sent into the gap with the inner tube 4, each particle of the incinerated ash is ejected downward from the tip of the outer tube 13 and the inner tube 14, and the flame 2
2 along the direction in which it is jetted, whereby it melts quickly and reliably and spheroidizes due to surface tension.

【００２２】火炎２２から出た溶融球状化した焼却灰
は、冷却空間１０で浮遊しながら温度低下するととも
に、ブロワ１１より供給される冷却空気によって冷却さ
れ、固化して安定な溶融球状化物となる。溶融球状化し
た焼却灰が壁面に接触することがあるが、水冷壁１２と
されているので付着することはなく、壁面を転動したも
のは完全な球形に近づく。The molten spheroidized incineration ash emitted from the flame 22 drops in temperature while floating in the cooling space 10, and is cooled by the cooling air supplied from the blower 11 to be solidified into a stable molten spheroidized product. . Although the incineration ash that has been melted and spheroidized may come into contact with the wall surface, it does not adhere to the water-cooled wall 12 and the tumbled wall surface approaches a perfect sphere.

【００２３】溶融球状化物を含んだ高温の排ガス（約７
００〜８００℃）は溶融球状化炉１の炉出口８ａを出
て、高温サイクロン２の内部に流入し、ここで溶融球状
化物を分離される。分離された溶融球状化物は貯溜槽７
に取り出される。High temperature exhaust gas containing molten spheroids (about 7
(800 ° C. to 800 ° C.) exits the furnace outlet 8 a of the melting spheroidizing furnace 1 and flows into the high-temperature cyclone 2 where the molten spheroidized material is separated. The separated molten spheroids are stored in a storage tank 7.
Is taken out.

【００２４】高温サイクロン２から出た高温の排ガス
（約６５０〜７５０℃）は高温バグフィルタ３に流入
し、ここで微細な溶融球状化物、セレン、ヒ素、ダイオ
キシンなどの浮遊物を分離される。The high-temperature exhaust gas (about 650 to 750 ° C.) discharged from the high-temperature cyclone 2 flows into the high-temperature bag filter 3, where fine molten spheroids, suspended matters such as selenium, arsenic, and dioxin are separated.

【００２５】高温バグフィルタ３から出た高温の排ガス
は空気予熱器５に流入し、ブロワ４からの空気との熱交
換によって温度低下した後、別途設けられた排ガス処理
装置（図示せず）に送られる。The high-temperature exhaust gas flowing out of the high-temperature bag filter 3 flows into the air preheater 5 and is cooled by heat exchange with the air from the blower 4, and then is cooled by a separately provided exhaust gas processing device (not shown). Sent.

【００２６】このようにして得られた溶融球状化物は、
表面が溶融しているため溶出特性に問題がなく、高温の
排ガスより分離回収したためセレンやヒ素は付着してお
らず、安全であるとともに、流動層炉もしくは循環流動
層炉の汚泥焼却灰が出発物質であるため微細であって、
かつ球形度がよく、均質なので、混和材として用いれ
ば、強度、流動性に優れたコンクリートが得られる。The thus obtained molten spheroidized product is
Since the surface is molten, there is no problem in elution characteristics.Since it has been separated and recovered from high-temperature exhaust gas, selenium and arsenic do not adhere.It is safe, and sludge incineration ash from a fluidized bed furnace or circulating fluidized bed furnace starts. It is fine because it is a substance,
Moreover, since it has good sphericity and is homogeneous, a concrete excellent in strength and fluidity can be obtained when used as an admixture.

【００２７】下水汚泥焼却灰は表１に示したような組成
（乾物ベース）を有し、この焼却灰の溶融温度は１３０
０℃程度なので、下水汚泥焼却灰、あるいはこれと同等
の組成を有する汚泥の焼却灰は通常、約１５００℃以上
の火炎中を通過させることで溶融球状化させることがで
きる。The sewage sludge incineration ash has a composition (dry matter basis) as shown in Table 1, and the melting temperature of this incineration ash is 130
Since it is about 0 ° C., sewage sludge incineration ash or sludge incineration ash having an equivalent composition can usually be melted and spheroidized by passing through a flame of about 1500 ° C. or more.

【００２８】空気バーナの火炎温度は燃料によって異な
り、理論上、天然ガス２１６０℃、プロパンガス１９９
０℃、灯油・重油１７６０℃、微粉炭２１９０℃程度に
なるので、これらの燃料を使用することができる。The flame temperature of the air burner depends on the fuel, and is theoretically 2160 ° C. natural gas and 199 propane gas.
These fuels can be used because the temperature is about 0 ° C, kerosene / heavy oil 1760 ° C, and pulverized coal 2190 ° C.

【００２９】表１の組成を有する平均粒径２０ミクロン
の下水汚泥焼却灰８０ｋｇ／ｈを搬送空気５４Ｎｍ3 ／
ｈによって噴出し、天然ガスを燃料とした空気バーナの
火炎中を通過させた時には、平均粒径１５ミクロン（粒
径１０〜３０ミクロン）の溶融球状化物が得られ、この
溶融球状化物で３０％までセメント置換しても高流動コ
ンクリートとしての特性が維持された。80 kg / h of sewage sludge incineration ash having an average particle diameter of 20 μm having the composition shown in Table 1 was transferred to a carrier air of 54 Nm 3 / h.
h, and when passed through the flame of an air burner using natural gas as a fuel, a molten spheroid having an average particle diameter of 15 microns (particle diameter of 10 to 30 microns) is obtained. Even with cement replacement, the properties as high fluidity concrete were maintained.

【００３０】[0030]

【表１】 [Table 1]

【００３１】[0031]

【発明の効果】以上のように本発明によれば、酸素バー
ナ等より火炎温度の低い空気バーナを用いて、球形度が
よく、均質な溶融粒状物を直接かつ収率よく製造するこ
とができ、得られる溶融球状化物は、表面が溶融してい
るため重金属などが溶出する恐れがなく、高温サイクロ
ンで分離回収するようにしたためセレンやヒ素は付着し
ておらず、安全であるだけでなく、従来の溶融スラグの
ように粉砕等の工程が不要であるのはもちろんのこと、
強度、流動性とも高く、コンクリート混和材として利用
した場合も製品に十分な圧縮強度や曲げ強度を与えるの
で、利用用途が広い。As described above, according to the present invention, it is possible to directly produce uniform molten granules with good sphericity and high yield by using an air burner having a lower flame temperature than an oxygen burner or the like. The resulting molten spheroids are not only safe because heavy metal and the like are not eluted because the surface is molten, and selenium and arsenic are not attached because they are separated and recovered in a high-temperature cyclone. Needless to say, there is no need for a process such as pulverization as with conventional molten slag,
Both strength and fluidity are high, and when used as a concrete admixture, it gives the product sufficient compressive strength and bending strength, so it is widely used.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明の一実施形態において下水汚泥焼却灰か
ら溶融球状化物を製造する溶融球状化炉およびその周囲
の装置構成を示した説明図である。FIG. 1 is an explanatory view showing a molten spheroidizing furnace for producing a molten spheroidized product from sewage sludge incineration ash in one embodiment of the present invention, and an apparatus configuration around the furnace.

【図２】図１に示した溶融球状化炉の空気バーナの周囲
の構成を示した説明図である。FIG. 2 is an explanatory view showing a configuration around an air burner of the melting and sphering furnace shown in FIG. 1;

【符号の説明】[Explanation of symbols]

１ 溶融球状化炉 ８ 炉体 ９ 空気バーナ 10 冷却空間 11 ブロワ（冷却空気供給手段） 12 水冷壁 16 燃料供給管 19 焼却灰供給管 20 一次燃焼空気供給管 22 火炎 DESCRIPTION OF SYMBOLS 1 Melting spheroidizing furnace 8 Furnace 9 Air burner 10 Cooling space 11 Blower (cooling air supply means) 12 Water cooling wall 16 Fuel supply pipe 19 Incineration ash supply pipe 20 Primary combustion air supply pipe 22 Flame

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｃ０４Ｂ 18/04 Ｂ０９Ｂ 3/00 ＺＡＢ (72)発明者 松川 満兆 大阪府大阪市浪速区敷津東一丁目２番47号 株式会社クボタ内 (72)発明者 高角 章夫 大阪府大阪市浪速区敷津東一丁目２番47号 株式会社クボタ内 (72)発明者 坂田 晃治 大阪府大阪市浪速区敷津東一丁目２番47号 株式会社クボタ内──────────────────────────────────────────────────続 き Continuation of front page (51) Int.Cl. 6 Identification code FI C04B 18/04 B09B 3/00 ZAB (72) Inventor Mitsucho Matsukawa 2-47 Shishitsuhigashi, Namiwa-ku, Osaka-shi, Osaka Kubota Co., Ltd. (72) Inventor Akio Takakaku 1-47, Shikitsu Higashi 1-chome, Namiwa-ku, Osaka-shi, Osaka Prefecture Kubota Co., Ltd. No. 47 Kubota Corporation

Claims (3)

【特許請求の範囲】[Claims] 【請求項１】 汚泥焼却灰を導入して溶融球状化物とな
す溶融球状化炉と、前記溶融球状化炉より流出する溶融
球状化物を含んだ高温の排ガスを導入して溶融球状化物
を分離回収する高温サイクロンと、前記高温サイクロン
より流出する高温の排ガスを導入して微細な浮遊物を分
離回収する高温バグフィルタとを備え、前記溶融球状化
炉は、一端部に設けられて火炎を前方へ噴射する空気バ
ーナと、空気バーナのノズル口の近傍に設けられて、汚
泥焼却灰を空気バーナの火炎中に火炎が噴射される方向
に沿って噴出する焼却灰噴出手段と、空気バーナの火炎
を通過した汚泥焼却灰が浮遊して冷却固化する冷却空間
とを有したことを特徴とする汚泥焼却灰からの溶融球状
化物製造装置。1. A molten spheroidizing furnace for introducing sludge incineration ash to form a molten spheroidized product, and a high-temperature exhaust gas containing the molten spheroidized product flowing out of the melting spheroidizing furnace is introduced to separate and collect the molten spheroidized product. High-temperature cyclone, and a high-temperature bag filter that introduces high-temperature exhaust gas flowing out of the high-temperature cyclone and separates and recovers fine suspended matter, and the melting spheroidizing furnace is provided at one end and forwards the flame. An air burner for injecting, incineration ash ejecting means provided near a nozzle opening of the air burner, for injecting sludge incineration ash in a direction in which the flame is injected into the flame of the air burner, and a flame of the air burner. An apparatus for producing a molten spheroid from sludge incineration ash, comprising: a cooling space in which the sludge incineration ash that has passed is suspended and cooled and solidified. 【請求項２】 溶融球状化炉は、空気バーナの火炎に沿
う炉壁を水冷壁として構成したことを特徴とする請求項
１記載の汚泥焼却灰からの溶融球状化物製造装置。2. The apparatus for producing a molten spheroidized product from sludge incineration ash according to claim 1, wherein the furnace wall along the flame of the air burner is configured as a water cooling wall. 【請求項３】 溶融球状化炉は、溶融球状化した汚泥焼
却灰の各粒子を冷却する冷却空気もしくは噴霧冷却水な
どの冷却媒体を供給する冷却媒体供給手段を有したこと
を特徴とする請求項１記載の汚泥焼却灰からの溶融球状
化物製造装置。3. The melting spheroidizing furnace has cooling medium supply means for supplying a cooling medium such as cooling air or spray cooling water for cooling each particle of the molten spheroidized sludge incineration ash. Item 1. An apparatus for producing a molten spheroid from sludge incineration ash according to Item 1.
JP3648998A 1998-02-19 1998-02-19 Equipment for producing molten spheroids from sludge incineration ash Expired - Fee Related JP3659788B2 (en)

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JPH11226541A true JPH11226541A (en) 1999-08-24
JP3659788B2 JP3659788B2 (en) 2005-06-15

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006247446A (en) * 2005-03-08 2006-09-21 Nisshin Seifun Group Inc Method and apparatus for manufacturing fine particles
JP2010075810A (en) * 2008-09-25 2010-04-08 Chugai Ro Co Ltd Apparatus for producing spherical particle
US7828999B2 (en) 2004-09-07 2010-11-09 Nisshin Seifun Group Inc. Process and apparatus for producing fine particles

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7828999B2 (en) 2004-09-07 2010-11-09 Nisshin Seifun Group Inc. Process and apparatus for producing fine particles
JP2006247446A (en) * 2005-03-08 2006-09-21 Nisshin Seifun Group Inc Method and apparatus for manufacturing fine particles
JP2010075810A (en) * 2008-09-25 2010-04-08 Chugai Ro Co Ltd Apparatus for producing spherical particle

Also Published As

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