JP5363047B2 - Incineration ash transfer screw - Google Patents
Incineration ash transfer screw Download PDFInfo
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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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- 229910045601 alloy Inorganic materials 0.000 claims description 12
- 239000000956 alloy Substances 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 8
- 239000010935 stainless steel Substances 0.000 claims description 8
- 229910001220 stainless steel Inorganic materials 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 229910000990 Ni alloy Inorganic materials 0.000 claims description 3
- 239000010802 sludge Substances 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 239000000428 dust Substances 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910001026 inconel Inorganic materials 0.000 description 1
- 229910001055 inconels 600 Inorganic materials 0.000 description 1
- 229910001119 inconels 625 Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Screw Conveyors (AREA)
- Gasification And Melting Of Waste (AREA)
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
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
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
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
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
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
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
（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.
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
Claims (1)
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.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008194776A JP5363047B2 (en) | 2008-07-29 | 2008-07-29 | Incineration ash transfer screw |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008194776A JP5363047B2 (en) | 2008-07-29 | 2008-07-29 | Incineration ash transfer screw |
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|---|---|
| JP2010030739A JP2010030739A (en) | 2010-02-12 |
| JP5363047B2 true JP5363047B2 (en) | 2013-12-11 |
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Cited By (1)
| 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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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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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 |
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| 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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| JP2010030739A (en) | 2010-02-12 |
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