JP5363047B2 - Incineration ash transfer screw - Google Patents

Incineration ash transfer screw Download PDF

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JP5363047B2
JP5363047B2 JP2008194776A JP2008194776A JP5363047B2 JP 5363047 B2 JP5363047 B2 JP 5363047B2 JP 2008194776 A JP2008194776 A JP 2008194776A JP 2008194776 A JP2008194776 A JP 2008194776A JP 5363047 B2 JP5363047 B2 JP 5363047B2
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screw
shaft member
incineration ash
welded
based alloy
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JP2010030739A (en
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三樹男 米山
佳宏 辰巳
裕樹 北村
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Osaka Fuji Corp
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Description

本発明は、焼却灰搬送用スクリュー、特に、製紙スラッジなどの焼却灰を搬送するためのスクリューに関する。   The present invention relates to a screw for incineration ash conveyance, and more particularly to a screw for conveying incineration ash such as paper sludge.

従来、製紙工場で発生する製紙スラッジなどは焼却廃棄しており、その焼却炉では850℃以上の高温の半溶融状態にある焼却灰をスクリューにて搬送していた。この種のスクリューは、ステンレス製の搬送筒内に設置され、ステンレス製の軸部材の外周部に同じくステンレス製のスクリュー羽根を溶接したものが用いられていた。   Conventionally, papermaking sludge and the like generated in a paper mill are incinerated and discarded, and incinerator ash in a semi-molten state at a high temperature of 850 ° C. or higher is conveyed by a screw. This type of screw was installed in a stainless steel transport cylinder, and a stainless steel screw member was welded to the outer periphery of a stainless steel shaft member.

しかしながら、850℃以上の高温での腐食環境下においては、耐熱性を考慮する必要があり、軸部材には水冷式の冷却手段を内蔵することで一応解決可能であるが、ステンレス製のスクリュー羽根では水冷効果が作用せず、羽根自体に熱変形や亀裂が早期に発生し、また、軸部材との間にも亀裂や摩耗が生じ、半年間の使用で交換せざるを得ないのが現状である。   However, in a corrosive environment at a high temperature of 850 ° C. or higher, it is necessary to consider heat resistance, and the shaft member can be temporarily solved by incorporating a water-cooling type cooling means. However, the water cooling effect does not work, the blade itself undergoes thermal deformation and cracks at an early stage, and cracks and wear also occur with the shaft member, which must be replaced after half a year of use. It is.

そこで、本発明の目的は、耐熱性に優れ長寿命化を達成できる焼却灰搬送用スクリューを提供することにある。   Then, the objective of this invention is providing the screw for incineration ash conveyance which is excellent in heat resistance and can achieve long life.

以上の目的を達成するため、本発明の一形態である焼却灰搬送用スクリューは、
内部に冷却手段を含む円筒形状の軸部材と、該軸部材の外周部に螺旋状に取り付けたスクリュー羽根とからなる焼却灰搬送用スクリューにおいて、
前記軸部材はステンレスからなり、
前記スクリュー羽根はNi系合金にて形成されており、かつ、前記軸部材の外周部にNi系合金にて溶接されており
前記軸部材の端部外周面であって前記スクリュー羽根が溶接された部分以外を除いてNi系合金が肉盛り溶接されていること、
を特徴とする。
In order to achieve the above object, an incineration ash conveying screw according to one aspect of the present invention is provided.
In a screw for incineration ash conveyance consisting of a cylindrical shaft member including a cooling means inside and a screw blade spirally attached to the outer periphery of the shaft member,
The shaft member is made of stainless steel,
The screw blade is formed by Ni-based alloy, and is welded at Ni alloy on the outer periphery of the shaft member,
The Ni-based alloy is overlaid and welded except for the outer peripheral surface of the end portion of the shaft member and the portion where the screw blade is welded,
It is characterized by.

Ni系合金は、熱伝導度、線膨脹率、耐熱性、耐溶融塩性などがステンレスよりも優れている。前記焼却灰搬送用スクリューにおいて、スクリュー羽根はNi系合金にて形成されており、かつ、軸部材の外周部にNi系合金にて溶接されているため、耐熱性に優れ、使用によって早期に変形や亀裂が発生することがなく、従来のものより長寿命化を達成することができる。   Ni-based alloys are superior to stainless steel in terms of thermal conductivity, linear expansion coefficient, heat resistance, and molten salt resistance. In the incineration ash conveying screw, the screw blades are made of a Ni-based alloy and welded to the outer peripheral portion of the shaft member with a Ni-based alloy. No cracks occur and a longer life can be achieved than the conventional one.

また、前記焼却灰搬送用スクリューにおいては、前記軸部材の端部外周面であって前記スクリュー羽根が溶接された部分以外を除いてNi系合金が肉盛り溶接されているため、軸部材の耐熱性をより向上させることができる。 Further, the in ash conveying screw, the shaft end portion outer peripheral surface at a said yet Ni alloy screw blade except except welded portions is overlay clad which because of the member, the heat of the shaft member The sex can be further improved.

以下、本発明に係る焼却灰搬送用スクリューの実施例について、添付図面を参照して説明する。   Hereinafter, the Example of the screw for incineration ash conveyance concerning this invention is described with reference to an accompanying drawing.

図1は、製紙スラッジの焼却炉の要部を示し、1はサイクロン、2はダストホルダ、3はサイクロン灰クーラである。半溶融状態にある焼却灰は、サイクロン1に投入され、ダストホルダ2からサイクロン灰クーラ3に受け渡され、サイクロン灰クーラ3内を矢印A方向に搬送される。   FIG. 1 shows the main part of an incinerator for papermaking sludge, where 1 is a cyclone, 2 is a dust holder, and 3 is a cyclone ash cooler. The incinerated ash in a semi-molten state is charged into the cyclone 1, transferred from the dust holder 2 to the cyclone ash cooler 3, and conveyed through the cyclone ash cooler 3 in the direction of arrow A.

サイクロン灰クーラ3は、搬送筒11と、該搬送筒11内に同軸上に取り付けた焼却灰搬送用スクリュー12(図2参照)とで構成されている。焼却灰搬送用スクリュー12は、内部に水冷式の冷却手段を含む円筒形状の軸部材13と、該軸部材13の外周部に螺旋状に取り付けたスクリュー羽根14とからなる。軸部材13の本体部分の長さは約4800mm、直径は約400mmである。スクリュー羽根14の外径は約700mmである。   The cyclone ash cooler 3 includes a transport cylinder 11 and an incineration ash transport screw 12 (see FIG. 2) that is coaxially mounted in the transport cylinder 11. The incineration ash conveying screw 12 includes a cylindrical shaft member 13 including a water-cooling cooling means inside, and a screw blade 14 spirally attached to the outer peripheral portion of the shaft member 13. The length of the main body portion of the shaft member 13 is about 4800 mm and the diameter is about 400 mm. The outer diameter of the screw blade 14 is about 700 mm.

軸部材13は、ステンレス(SUS316)からなり、両端部の軸受け部13a,13bにて搬送筒11に回転自在に支持されており、軸受け部13b側から駆動力が伝達される。また、軸受け部13aから供給された冷却水は軸部材13の内部を矢印A方向に流れ、軸受け部13bから排出される。   The shaft member 13 is made of stainless steel (SUS316), and is rotatably supported by the transport cylinder 11 by bearing portions 13a and 13b at both ends, and a driving force is transmitted from the bearing portion 13b side. Further, the cooling water supplied from the bearing portion 13a flows in the direction of the arrow A in the shaft member 13 and is discharged from the bearing portion 13b.

スクリュー羽根14は、Ni系合金(例えば、インコネル600やインコネル625、なお、インコネルはインコ社の登録商標)にて形成されており、かつ、軸部材13の外周部にNi系合金にて溶接されている。ここでの溶接は、PTA法(プラズマ粉体溶接)にて、スクリュー羽根14と軸部材13の接合部の全長にわたって行われている。   The screw blade 14 is formed of a Ni-based alloy (for example, Inconel 600 or Inconel 625, Inconel is a registered trademark of Inco Corporation), and is welded to the outer peripheral portion of the shaft member 13 with a Ni-based alloy. ing. The welding here is performed over the entire length of the joint between the screw blade 14 and the shaft member 13 by the PTA method (plasma powder welding).

また、軸部材13に関しては、図2に示す領域Y1,Y2において、前記同様のNi系合金にて肉盛り溶接が施されている。肉盛りは1層であり、厚みは約1.8mmである。   Further, the shaft member 13 is subjected to build-up welding with the same Ni-based alloy in the regions Y1 and Y2 shown in FIG. The build-up is one layer and the thickness is about 1.8 mm.

ここで、以下の表1に、従来から使用されているステンレス(表1では材料1で示す)、本願発明で使用されているNi系合金(表1では材料2、材料3で示す)の諸性能を示す。   Here, in Table 1 below, various types of conventionally used stainless steel (shown as material 1 in Table 1) and Ni-based alloys used in the present invention (shown as material 2 and material 3 in Table 1) are shown. Show performance.

Figure 0005363047
Figure 0005363047

前記スクリュー羽根14を製作し、製紙スラッジの焼却炉において、高温状態の焼却灰を連続的に冷却させる設備(図1参照)に設け、実験的に稼働させたところ、半年たっても、スクリュー羽根14自体に熱変形や亀裂の発生は見られなかった。また、スクリュー羽根14の軸部材13に対する溶接部分にも亀裂や摩耗の発生は見られなかった。さらに、軸部材13の肉盛り領域Y1,Y2での摩耗も見られなかった。焼却灰搬送用スクリュー12の寿命は4倍以上であると推定される。   When the screw blades 14 are manufactured and installed in a facility (see FIG. 1) for continuously cooling the incinerated ash in a high temperature state in an incinerator for papermaking sludge and operated experimentally, even after half a year, the screw blades 14 There was no thermal deformation or cracking in itself. In addition, cracks and wear were not observed in the welded portion of the screw blade 14 to the shaft member 13. Furthermore, the wear in the build-up areas Y1 and Y2 of the shaft member 13 was not observed. It is estimated that the life of the incineration ash conveying screw 12 is four times or more.

(他の実施例)
なお、本発明に係る焼却灰搬送用スクリューは前記実施例に限定するものではなく、その要旨の範囲内で種々に変更できる。
(Other examples)
In addition, the screw for incineration ash conveyance concerning this invention is not limited to the said Example, It can change variously within the range of the summary.

特に、軸部材へのNi系合金の肉盛り溶接は前記領域Y1,Y2に限定するものではなく、また、実施例で挙げた寸法などの数値はあくまで例示である。   In particular, the build-up welding of the Ni-based alloy to the shaft member is not limited to the regions Y1 and Y2, and numerical values such as dimensions given in the examples are merely examples.

本発明に係る焼却灰搬送用スクリューの一実施例を備えた焼却炉の要部を示す立面図である。It is an elevational view showing the main part of an incinerator equipped with an embodiment of the screw for incineration ash conveyance according to the present invention. 本発明に係る焼却灰搬送用スクリューの一実施例を示す正面図である。It is a front view which shows one Example of the screw for incineration ash conveyance which concerns on this invention.

符号の説明Explanation of symbols

12…焼却灰搬送用スクリュー
13…軸部材
14…スクリュー羽根
12 ... Screw for incineration ash conveyance 13 ... Shaft member 14 ... Screw blade

Claims (1)

内部に冷却手段を含む円筒形状の軸部材と、該軸部材の外周部に螺旋状に取り付けたスクリュー羽根とからなる焼却灰搬送用スクリューにおいて、
前記軸部材はステンレスからなり、
前記スクリュー羽根はNi系合金にて形成されており、かつ、前記軸部材の外周部にNi系合金にて溶接されており
前記軸部材の端部外周面であって前記スクリュー羽根が溶接された部分以外を除いてNi系合金が肉盛り溶接されていること、
を特徴とする焼却灰搬送用スクリュー。
In a screw for incineration ash conveyance consisting of a cylindrical shaft member including a cooling means inside and a screw blade spirally attached to the outer periphery of the shaft member,
The shaft member is made of stainless steel,
The screw blade is formed by Ni-based alloy, and is welded at Ni alloy on the outer periphery of the shaft member,
The Ni-based alloy is overlaid and welded except for the outer peripheral surface of the end portion of the shaft member and the portion where the screw blade is welded,
A screw for incineration ash conveyance.
JP2008194776A 2008-07-29 2008-07-29 Incineration ash transfer screw Active JP5363047B2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU221774U1 (en) * 2023-05-22 2023-11-22 Максим Валерьевич Марков AUGER CONVEYOR

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JP5987379B2 (en) * 2012-03-15 2016-09-07 住友金属鉱山株式会社 Screw conveyor
CN111256157A (en) * 2020-01-15 2020-06-09 无锡市新浩锅炉辅机有限公司 Boiler slag discharging equipment capable of recycling residual heat of coal slag
CN113751975B (en) * 2021-09-02 2024-10-11 上海龙炽机械设备有限公司 Processing technology of spiral of horizontal centrifugal machine

Family Cites Families (6)

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Publication number Priority date Publication date Assignee Title
JPS61248703A (en) * 1985-04-26 1986-11-06 Hitachi Metals Ltd Corrosion-resistant and wear-resistant screw
JPS63262220A (en) * 1987-04-20 1988-10-28 Hitachi Metals Ltd Screw having high corrosion resistance and high abrasion resistance
JPH06340317A (en) * 1993-05-31 1994-12-13 Sony Chem Corp Screw feeder
JP2000327126A (en) * 1999-05-14 2000-11-28 Nippon Steel Corp Screw conveyor excellent in cooling power
JP3558581B2 (en) * 2000-05-01 2004-08-25 株式会社タクマ Ash supply device
JP2002060042A (en) * 2000-08-21 2002-02-26 Tanaka:Kk Screw conveyor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU221774U1 (en) * 2023-05-22 2023-11-22 Максим Валерьевич Марков AUGER CONVEYOR

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