JPH06173188A - Dryer for papermaking machine - Google Patents
Dryer for papermaking machineInfo
- Publication number
- JPH06173188A JPH06173188A JP43A JP34509392A JPH06173188A JP H06173188 A JPH06173188 A JP H06173188A JP 43 A JP43 A JP 43A JP 34509392 A JP34509392 A JP 34509392A JP H06173188 A JPH06173188 A JP H06173188A
- Authority
- JP
- Japan
- Prior art keywords
- canvas
- hot air
- dryer
- drum
- hood
- 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.)
- Pending
Links
Landscapes
- Paper (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はプレスパートを通過した
後に湿紙が保有する水分を加熱乾燥するための抄紙機の
ドライヤに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dryer of a paper machine for heating and drying the moisture contained in a wet paper after passing through a press part.
【０００２】[0002]
【従来の技術】抄紙機では、湿紙がプレスパートを過ぎ
た後に保有する水分は６０〜７０％であるが、それ以上
の水分を圧搾により機械的に取り除くことは困難である
ため、プレスパートの次にドライヤパートを配置し、加
熱乾燥によって脱水を行うようにしている。2. Description of the Related Art In a paper machine, a wet paper web has a water content of 60 to 70% after passing through the press part, but since it is difficult to mechanically remove more water than that, it is difficult to press the press part. Next, a dryer part is placed, and dehydration is performed by heating and drying.
【０００３】抄紙機における従来のドライヤパートは、
図４に一例を示す如く、複数のドライヤドラム１を上下
２段に配列してなるドラム群２を、紙搬送方向（矢印Ｘ
で示す）へ複数群（図では２群の場合を示す）直列に設
置して、これらドラム群２をフード３で覆い、且つ上記
各ドラム群２ごとに、上段の複数個のドライヤドラム１
と下段の複数個のドライヤドラム１に上下から別々にエ
ンドレスのカンバス７を当接配置し、プレスパート４を
通過してきた湿紙５を、上記フード３の導入口６から導
いて上下のドライヤドラム１と上下のカンバス７との間
を順次通しながら掛け回して紙搬送方向へ誘導すると同
時に各ドライヤドラム１に押し当てて乾燥させるように
してある。なお、８はフード３の上部に設けた排気口、
９はエンドレス状のカンバス７を掛け巡らすためのガイ
ドローラ、１０はテンションローラを示す。A conventional dryer part in a paper machine is
As shown in an example in FIG. 4, a drum group 2 formed by arranging a plurality of dryer drums 1 in upper and lower two stages is arranged in a paper conveying direction (arrow X
A plurality of groups (shown in the figure shows the case of two groups) in series, the drum groups 2 are covered with a hood 3, and a plurality of upper dryer drums 1 are provided for each of the drum groups 2.
Endless canvases 7 are separately placed in contact with the plurality of dryer drums 1 at the bottom and from above and below, and the wet paper web 5 that has passed through the press part 4 is guided from the inlet 6 of the hood 3 to the upper and lower dryer drums. 1 and the upper and lower canvases 7 are sequentially passed around and guided in the paper conveying direction, and at the same time, pressed against each dryer drum 1 to be dried. In addition, 8 is an exhaust port provided in the upper part of the hood 3,
Reference numeral 9 is a guide roller for winding the endless canvas 7, and 10 is a tension roller.
【０００４】[0004]
【発明が解決しようとする課題】ところが、上記従来の
ドライヤパートの場合、湿紙５の水分蒸発により発生し
た高露点の空気流がフード３から吹き出すため、操業上
の弊害につながることが多かった。すなわち、この空気
流は、カンバス７から離れたところではゆるやかな流れ
であるので排気口８から排出されるが、ドライヤパート
は年々高速化されているため、高速で移動するカンバス
７のリターン側の部分で空気が連れ走りさせられる現像
が生じ、上段側でカンバス７の移動によりカンバス７の
リターン側で連れ走りさせられた空気流Ａは、フード３
内を湿紙導入口６の方向へ逆流させられて該湿紙導入口
６からプレスパート４側へ噴出させられてしまい、プレ
スパート４の天井梁等に接触して結露し、それが水滴と
なって製品上に落下することによって製品品質に悪影響
を与える問題がある。一方、下段側でカンバス７の移動
に連れ走りさせられた空気流Ｂは、搬送中の湿紙５に衝
突し、湿紙５を破損するという問題がある。However, in the case of the above-mentioned conventional dryer part, the air flow having a high dew point generated by the evaporation of the moisture of the wet paper 5 is blown out from the hood 3, which often causes an adverse effect on the operation. . That is, this airflow is discharged from the exhaust port 8 because it is a gentle flow away from the canvas 7, but since the dryer part is speeded up year by year, the return side of the canvas 7 that moves at high speed is discharged. The air flow A caused by the development of air caused by the movement of the canvas 7 on the return side of the canvas 7 is caused by the movement of the canvas 7 on the upper side.
The inside is made to flow backward toward the wet paper web introduction port 6 and is jetted from the wet paper web introduction port 6 toward the press part 4 side, contacting the ceiling beam of the press part 4 and the like to form dew, which forms water droplets. There is a problem that the quality of the product is adversely affected by falling on the product. On the other hand, there is a problem that the air flow B caused by the movement of the canvas 7 on the lower stage side collides with the wet paper web 5 being conveyed and damages the wet paper web 5.
【０００５】そのため、従来では、図４において二点鎖
線で示す如く、上記フード３内の少なくとも湿紙導入口
６の付近や各ドラム群２の群間部に遮蔽板１１を配置す
ることが行われているが、この遮蔽板１１はカンバス７
を傷付けないようにカンバス表面から５０mm程度離間さ
せて設置するようにしているので、カンバス７の表面部
に沿って連れ走りさせられる高速の空気流を充分に遮蔽
することはできず、上述した問題を効果的に解決できる
までには至っていないのが実情である。Therefore, conventionally, as shown by a chain double-dashed line in FIG. 4, a shield plate 11 is arranged in the hood 3 at least in the vicinity of the wet paper web inlet 6 and between the drum groups 2. This shield 11 is a canvas 7
Since it is installed at a distance of about 50 mm from the surface of the canvas so as not to damage it, it is not possible to sufficiently block the high-speed airflow that is made to run along the surface of the canvas 7, thus causing the above-mentioned problems. The reality is that we have not been able to effectively solve the problem.
【０００６】そこで、本発明は、カンバスを傷付けるこ
となく、フード外への高露点の空気の吹き出しを防止し
て操業の安定化を図り得るようにしようとするものであ
る。Therefore, the present invention is intended to prevent the blowout of air with a high dew point outside the hood and to stabilize the operation without damaging the canvas.
【０００７】[0007]
【課題を解決するための手段】本発明は、上記課題を解
決するために、複数個のドライヤドラムを上下２段に配
列してなるドラム群をフードで覆うようにし、且つ上記
各ドラム群毎に上段のドライヤドラムと下段のドライヤ
ドラムに別々にエンドレスのカンバスを当接させ、上記
フードの湿紙導入口から導入した湿紙を、上下のドライ
ヤドラムとカンバスとの間を通して紙搬送方向へ誘導す
ると同時に各ドライヤドラムに押し当てて乾燥させるよ
うにしてある抄紙機のドライヤにおいて、上記フード内
のドラム群におけるカンバスのリターン側表面位置に、
該カンバスに連れ走りする空気流を押し戻すようにカン
バス移動方向とは逆方向からカンバスに対して熱風を吹
き付けるための熱風噴射ヘッダーを配置してなる構成と
する。SUMMARY OF THE INVENTION In order to solve the above problems, the present invention covers a drum group in which a plurality of dryer drums are arranged in two upper and lower stages with a hood, and each of the drum groups is Separately contact the endless canvas to the upper dryer drum and the lower dryer drum, and guide the wet paper introduced from the wet paper inlet of the hood in the paper transport direction between the upper and lower dryer drums and the canvas. At the same time, in the dryer of the paper machine that is pressed against each dryer drum to dry, at the return side surface position of the canvas in the drum group in the hood,
A hot air jet header for blowing hot air from the direction opposite to the canvas moving direction is arranged so as to push back the air flow that is traveling along the canvas.
【０００８】[0008]
【作用】上部熱風噴射ヘッダーから熱風を噴射させる
と、フードの入口部側へ逆流する空気流を押し戻すこと
ができ、又、下部熱風噴射ヘッダーから熱風を噴射させ
ると、群間部で上昇する空気流を押し戻すことができ
る。[Operation] When hot air is jetted from the upper hot air jet header, the air flow that flows backward to the inlet side of the hood can be pushed back, and when hot air is jetted from the lower hot air jet header, the air that rises in the inter-group part The flow can be pushed back.
【０００９】[0009]
【実施例】以下、本発明の実施例を図面を参照して説明
する。Embodiments of the present invention will be described below with reference to the drawings.
【００１０】図１は本発明の一実施例を示すもので、図
４に示したと同様な構成としてある抄紙機のドライヤに
おいて、フード３内の少なくとも湿紙導入口６付近に位
置する紙搬送方向最上流部のドラム群２における上段カ
ンバス７のリターン側表面位置に、カンバス移動方向と
は逆方向から適宜の角度（たとえば、５〜２０゜）で熱
風を吹き付けるための上部熱風噴射ヘッダー１２を配置
し、該上部熱風噴射ヘッダー１２から吹き出させる熱風
により、カンバス７に連れ走りさせられてプレスパート
４側へ逆流させられようとする空気流Ａを押し戻せるよ
うにし、且つ各ドラム群２の少なくとも群間部である下
段カンバス７間に、下流部に位置する下段カンバス７の
リターン側の表面上昇部に対してカンバス移動方向とは
逆方向から適宜の角度（たとえば、５〜２０゜）で熱風
を吹き付けるための下部熱風噴射ヘッダー１３を配置
し、該下部熱風噴射ヘッダー１３から吹き出させる熱風
により、カンバス７に連れ走りさせられて群間部で上昇
させられようとする空気流Ｂを押し戻せるようにする。FIG. 1 shows an embodiment of the present invention. In a dryer of a paper machine having a structure similar to that shown in FIG. 4, a paper conveyance direction located at least in the vicinity of a wet paper web introduction port 6 in the hood 3. An upper hot air jet header 12 for blowing hot air at an appropriate angle (for example, 5 to 20 °) from a direction opposite to the canvas moving direction is arranged at a position on the return side surface of the upper canvas 7 in the most upstream drum group 2. However, the hot air blown out from the upper hot air jet header 12 can push back the air flow A that is driven by the canvas 7 and is about to flow backward to the press part 4 side, and at least the group of each drum group 2 Between the lower canvas 7 which is the inter-portion, the surface of the lower canvas 7 on the downstream side, which is located on the downstream side, is appropriately moved from the direction opposite to the moving direction of the canvas. The lower hot air jet header 13 for blowing hot air at a temperature (for example, 5 to 20 °) is arranged, and the hot air blown out from the lower hot air jet header 13 is driven by the canvas 7 and raised in the inter-group portion. Be able to push back the air flow B that is about to be blown.
【００１１】上記上、下部熱風噴射ヘッダー１２，１３
は、図２に示す如く、角形又は円形のヘッダー管（又は
ダクト）１４に、多数の小孔状ノズル１５を開口させた
り、あるいは、図３に示す如く、長孔状ノズル１６を開
口させた構成としてある。図２及び図３において、１７
は熱風供給管、１８は流量調整弁を示す。The upper and lower hot air jet headers 12, 13
As shown in FIG. 2, a large number of small hole nozzles 15 are opened in a rectangular or circular header pipe (or duct) 14, or a long hole nozzle 16 is opened as shown in FIG. It is as a configuration. In FIGS. 2 and 3, 17
Is a hot air supply pipe, and 18 is a flow control valve.
【００１２】フード３内の入口部６付近に配置した上部
熱風噴射ヘッダー１２からカンバス７の移動速度よりも
速い流速で熱風を噴射させると、最上流部に位置するド
ラム群２の上段カンバス７のリターン側表面に沿って連
れ走りさせられる空気流Ａを、紙搬送方向の下流側へ押
し戻すことができる。したがって、露点の高い空気がフ
ード３の湿紙導入口６を通過してプレスパート４へ逆流
させられることを防止することができ、これにより、プ
レスパート４での水滴落下の問題をなくすことができ
る。又、同様に、群間部に配置した下部熱風噴射ヘッダ
ー１３から熱風を噴射させると、下段カンバス７のリタ
ーン側表面に沿い連れ走りさせられて上昇させられよう
とする群間部の空気流Ｂを下方へ押し戻すことができ
る。したがって、空気流Ｂによる湿紙５の破損を防止す
ることができる。When hot air is jetted from the upper hot air jet header 12 arranged near the inlet portion 6 in the hood 3 at a flow velocity higher than the moving velocity of the canvas 7, the upper canvas 7 of the drum group 2 located at the most upstream portion. The airflow A entrained along the return surface can be pushed back to the downstream side in the paper transport direction. Therefore, it is possible to prevent the air having a high dew point from flowing back to the press part 4 through the wet paper web introduction port 6 of the hood 3, thereby eliminating the problem of water drop falling in the press part 4. it can. Similarly, when hot air is jetted from the lower hot air jet header 13 disposed in the inter-group portion, the air flow B in the inter-group portion is made to be driven along the return side surface of the lower canvas 7 and to be raised. Can be pushed back down. Therefore, it is possible to prevent the wet paper web 5 from being damaged by the air flow B.
【００１３】本発明においては、上記の如く、熱風噴射
ヘッダー１２，１３によりカンバス７へカンバス移動方
向とは逆方向から熱風を吹き付けることで、連れ走りさ
せられる空気流を押し戻すようにするので、カンバス７
を傷付ける心配はなく、又、このとき、熱風がカンバス
７を乾燥させる作用を与えるため、湿紙５の乾燥効率を
向上できる利点もある。In the present invention, as described above, the hot air jet headers 12 and 13 blow hot air onto the canvas 7 from a direction opposite to the direction in which the canvas moves, thereby pushing back the air flow to be driven. 7
There is no fear of damaging the paper, and at this time, there is an advantage that the drying efficiency of the wet paper 5 can be improved because the hot air has a function of drying the canvas 7.
【００１４】なお、本発明は上記実施例のみに限定され
るものではなく、本発明の要旨を逸脱しない範囲内にお
いて種々変更を加え得ることは勿論である。The present invention is not limited to the above-mentioned embodiments, and it goes without saying that various modifications can be made without departing from the gist of the present invention.
【００１５】[0015]
【発明の効果】以上述べた如く、本発明の抄紙機のドラ
イヤによれば、上段カンバスのリターン側表面に対し、
上部熱風噴射ヘッダーにより熱風を吹き付けてフードの
湿紙導入口側へ逆流する空気流を押し戻すことができる
ようにし、且つ下段カンバスのリターン側表面上昇部に
対し、下部熱風噴射ヘッダーにより熱風を吹き付けて上
昇する空気流を押し戻すことができるようにしたので、
カンバスを傷付けることなく、フードから高露点の空気
流を吹き出させることを防止することができ、また湿紙
の破損を防止することができ、操業の安定化を図ること
ができる、という優れた効果を発揮する。As described above, according to the dryer of the paper machine of the present invention, with respect to the return side surface of the upper canvas,
The upper hot air jet header blows hot air to push back the air flow that flows backward to the wet paper web inlet side of the hood, and the lower hot air jet header blows hot air to the rising surface of the return side surface of the lower canvas. Since it is possible to push back the rising airflow,
An excellent effect that it is possible to prevent blowing out a high dew point air flow from the hood without damaging the canvas, prevent damage to the wet paper, and stabilize the operation. Exert.
【図１】本発明の抄紙機のドライヤの一実施例を示す概
要図である。FIG. 1 is a schematic view showing an embodiment of a dryer of a paper machine according to the present invention.
【図２】熱風噴射ヘッダーの一例を示す概略図である。FIG. 2 is a schematic view showing an example of a hot air jet header.
【図３】熱風噴射ヘッダーの他の例を示す概略図であ
る。FIG. 3 is a schematic view showing another example of a hot air jet header.
【図４】従来における抄紙機のドライヤパートの一例を
示す概要図である。FIG. 4 is a schematic diagram showing an example of a dryer part of a conventional paper machine.
１ ドライヤドラム ２ ドラム群 ３ フード ５ 湿紙 ６ 湿紙導入口 ７ カンバス １２ 上部熱風噴射ヘッダー １３ 下部熱風噴射ヘッダー Ｘ 紙搬送方向 Ａ，Ｂ 空気流 1 Dryer drum 2 Drum group 3 Hood 5 Wet paper 6 Wet paper inlet 7 Canvas 12 Upper hot air jet header 13 Lower hot air jet header X Paper transport direction A, B Air flow
Claims (1)
列してなるドラム群をフードで覆うようにし、且つ上記
各ドラム群毎に上段のドライヤドラムと下段のドライヤ
ドラムに別々にエンドレスのカンバスを当接させ、上記
フードの湿紙導入口から導入した湿紙を、上下のドライ
ヤドラムとカンバスとの間を通して紙搬送方向へ誘導す
ると同時に各ドライヤドラムに押し当てて乾燥させるよ
うにしてある抄紙機のドライヤにおいて、上記フード内
のドラム群におけるカンバスのリターン側表面位置に、
該カンバスに連れ走りする空気流を押し戻すようにカン
バス移動方向とは逆方向からカンバスに対して熱風を吹
き付けるための熱風噴射ヘッダーを配置してなる構成を
有することを特徴とする抄紙機のドライヤ。1. A drum group consisting of a plurality of dryer drums arranged in upper and lower two stages is covered with a hood, and an upper end dryer drum and a lower dryer drum are separately endless canvas for each drum group. The wet paper introduced from the wet paper introduction port of the hood is guided through the space between the upper and lower dryer drums and the canvas in the paper conveying direction, and at the same time pressed against each dryer drum to dry. In the dryer of the machine, on the return side surface position of the canvas in the drum group in the hood,
A dryer for a paper machine, comprising a hot air jet header for blowing hot air to the canvas from a direction opposite to the direction of movement of the canvas so as to push back the air flow that is traveling along the canvas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP43A JPH06173188A (en) | 1992-12-02 | 1992-12-02 | Dryer for papermaking machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP43A JPH06173188A (en) | 1992-12-02 | 1992-12-02 | Dryer for papermaking machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06173188A true JPH06173188A (en) | 1994-06-21 |
Family
ID=18374242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP43A Pending JPH06173188A (en) | 1992-12-02 | 1992-12-02 | Dryer for papermaking machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06173188A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002519539A (en) * | 1998-07-01 | 2002-07-02 | ザ、プロクター、エンド、ギャンブル、カンパニー | A method for removing water from a fibrous web using an oscillating and reversing impinging gas |
-
1992
- 1992-12-02 JP JP43A patent/JPH06173188A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002519539A (en) * | 1998-07-01 | 2002-07-02 | ザ、プロクター、エンド、ギャンブル、カンパニー | A method for removing water from a fibrous web using an oscillating and reversing impinging gas |
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