JPS58181498A - Pressurizing belt for sludge dehydrator of belt press type - Google Patents

Abstract

PURPOSE:To obtain a high dehydration effect of sludge, by applying a high face pressure from the outside of filter cloths, which sandwich sludge therebetween by using a sheet-like pressurizing belt produced by connecting a spiral coil of the wire rod with linear connecting members. CONSTITUTION:Sludge which is flocculated with a flocculating agent is supplied onto a lower filter cloth 3 at the part A and is dispersed uniformly in a transverse direction so as to be dehydrated by gravity. The concd. sludge layer is sandwiched between the upper and lower filter cloths 2 and 3 from the part B and as the spacing between the filter cloths decreases, the sludge is pressurized and dehydrated increasingly. The dehydration progresses with compression rolls 4-6. Finally the sludge moves into the spacing between a high pressure roll 7 and the rear surface of a pressurizing belt 1, where the sludge is compressed under high pressure and is then discharged from the part E. The belt 1 is wound on rolls 11-13 and high tension is applied on the belt 1 by controlling the roll 11. The belt 1 is formed of the sheet produced by intermeshing a spiral coil 14 of the wire rod, inserting linear connecting members 15 into the common holes formed by said intermeshing, and connecting the members successively. Such belt curves in conformity with the curvature of the roll without undue stress and the face pressure applied thereon is exerted uniformly over the entire width of the filter cloths, and since the belt has water permeable construction, the sludge is dehydrated with high efficiency.

Description

【発明の詳細な説明】 本発明はベルトプレス型汚泥脱水機の加圧用ベルトに関
する。ベルトプレス型汚泥脱水機は構造が単純であるこ
と、運転管理が容易なことなどから下水汚泥、し原汚泥
等の脱水に広く用いられるようになった。ベルトプレス
型汚泥脱水機の脱水機構を簡単に説明すれば、通常２枚
の戸布を複数本のロール間に張りわたし、たとえば５−
程度の張力をかけて戸布を駆動させ、１枚のＦ布の上に
汚泥を供給して、まず第一段として重力脱水を行い、第
２段としては楔状に２枚のＰ布の間隙をせばめていって
低圧圧搾脱水する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pressurizing belt for a belt press type sludge dewatering machine. Belt press type sludge dewatering machines have become widely used for dewatering sewage sludge, raw sludge, etc. because of their simple structure and easy operation management. To briefly explain the dewatering mechanism of a belt press type sludge dehydrator, two sheets of door cloth are usually stretched between multiple rolls, for example, 5-
The door cloth is driven with a certain amount of tension, and sludge is supplied onto one F cloth, and gravity dewatering is performed in the first stage, and in the second stage, the gap between two P cloths is squeezed in a wedge shape. It is compressed and dehydrated by low pressure.

第３段として炉布をＳ状に走行させることによって汚泥
に働く剪断力により脱水を促進式せる。In the third stage, the furnace cloth is run in an S-shape to promote dewatering by the shearing force acting on the sludge.

ところが最近は脱水処理後のケーキ処分の運送、焼却等
のエネルギー節約のため少しでもケーキ含水率を低くし
たいと云う要望が強いこと、難脱水性汚泥の脱水にも適
用されだしたことなどの理由でさらに高脱水を図る方法
Ｏ；考えられている。However, recently there has been a strong desire to reduce the moisture content of the cake as much as possible in order to save energy in transporting and incinerating the cake after dehydration treatment, and it has also begun to be applied to dewatering difficult-to-dewater sludge. Method O to achieve even higher dehydration is being considered.

たとえば脱水の最終段階に多数本のベルトを平行に間隔
をあけてかけわたし、高圧力でロールを押しつけながら
走行するように配することによって間に汚泥をはさんだ
Ｐ布の外側から高圧力を印加してさらに脱水を促進する
などの方法がある。For example, in the final stage of dewatering, a large number of belts are passed in parallel at intervals and are placed so that they run while pressing the rolls with high pressure, applying high pressure from the outside of the P cloth with sludge sandwiched between them. There are ways to further promote dehydration.

この方法によれば従来の炉布に緊張力を加えることによ
ってのみ脱水する方法と比較して、汚泥にかかる面圧を
さらに大きくすることができるためケーキ脱水率を低く
することができる。このベルト圧搾により押し出きれた
水は、加圧されている間にベルト間の間隙から出てくる
が、難脱水性の汚泥の場合には絞り出される水の量が相
対的に少ないこと、ベルトの下に押でえつけられている
汚泥中の水分が移動してくるのに時間がかかることから
加圧されている時間内に水を除くことが困難であって、
このことが含水率をさらに低くすることの支障になって
いた。この点を改善するためには今までのゴムベルトの
ような空隙がなく水か通らない構造の圧搾手段では目的
達成のためには不十分である。According to this method, compared to the conventional method of dewatering only by applying tension to the furnace cloth, the surface pressure applied to the sludge can be further increased, so that the cake dewatering rate can be lowered. The water that has been squeezed out by this belt squeezing comes out from the gap between the belts while it is being pressurized, but in the case of sludge that is difficult to dewater, the amount of water that is squeezed out is relatively small; Because it takes time for the water in the sludge that is pressed down under the belt to move, it is difficult to remove the water within the time that the belt is pressurized.
This has been an obstacle to further lowering the water content. In order to improve this point, conventional squeezing means such as rubber belts, which have no voids and have a structure that does not allow water to pass through, are insufficient to achieve the objective.

本発明はこの点を考えてσらに脱水効果をあげるための
加圧用ベルトを提供するもので、線材をコイル状に巻い
たスパイラルコイルを線状の接続部材でｌ！ｉニ連結し
シート状とした加圧用スパイラルベルトを脱水機の脱水
最終段階に高圧搾ロールを押しつける形で装着し、油圧
装置などによって高面圧を印加しながら走行するように
して高圧搾ロールと圧搾用スパイラルベルトの間でＰ布
にはさまれた汚泥を高圧搾する。The present invention takes this point into consideration and provides a pressurizing belt for increasing the dehydration effect to σ etc. In this invention, a spiral coil made of a wire rod is connected to a linear connecting member. A spiral belt for pressurization in the form of a sheet is attached to the dewatering machine in the final stage of dewatering to press against the high pressure roll, and is run while applying high surface pressure using a hydraulic device, etc. The sludge sandwiched between P cloth is compressed at high speed between the spiral belts for compression.

スパイラルコイルは合成樹脂モノフィラメント糸の外に
鉄系に特殊な樹脂をコートした糸、金属線、金属細線の
撚りｌに樹脂コートした線材など本使用可能である。接
続部材としてはコイルの素材６１すべて使用しうるか適
当な剛直性と耐岸耗性を持つ素材を機械の操業条件、汚
泥の性質に合せて適切なものを選定する必要がある。又
スパイラルコイル寸法、糸の線径、接続部材用の線径は
圧搾装置の大きさすなわちスパイラルベルトの大きさ、
印加する面圧の強さ等により種々のものを選ぶことかで
きる。場合によっては接続部材の外にコイルの中間部に
挿入部材を入れることによって高面圧のためコイルの潰
れを防止し補強を図ることも可能である。In addition to synthetic resin monofilament yarn, the spiral coil can be made of iron-based yarn coated with a special resin, metal wire, or wire rod made of twisted metal wire coated with resin. As the connecting member, it is necessary to select an appropriate material that can use all of the coil materials 61 or has appropriate rigidity and shore abrasion resistance depending on the operating conditions of the machine and the properties of the sludge. In addition, the dimensions of the spiral coil, the wire diameter of the thread, and the wire diameter for the connecting member are determined by the size of the pressing device, that is, the size of the spiral belt,
Various types can be selected depending on the strength of the surface pressure to be applied. In some cases, it is possible to prevent the coil from collapsing due to high surface pressure and to strengthen the coil by inserting an insertion member in the middle of the coil in addition to the connecting member.

以下図面を参照して本発明の詳細な説明する。The present invention will be described in detail below with reference to the drawings.

第一図は本発明の加圧ベルトを使用した汚泥脱水装置の
一例で２枚のエンドレス炉布（２）　、　（３）と数個
のガイドローラ及び高圧ベルト（１）から構成される。Figure 1 shows an example of a sludge dewatering device using a pressure belt according to the present invention, which is composed of two endless furnace cloths (2) and (3), several guide rollers, and a high-pressure belt (1).

高分子凝集剤の添加により凝集した汚泥をＡ部で下部Ｆ
布（３）土に供給し、巾方向に均一に分散して重力によ
る脱水を行い炉布（３）土に固形分を残留させ下方に水
分を流出式せ汚泥を濃縮する。次にこの汚泥層ＶｉＢ部
から上部戸布（２）と下部戸布（３）との間にはさみこ
オれその間隙が減少するに従い加圧はれ脱水はれる。更
に順次直径の異なる剪断圧搾ローラ群（４）〜（６）に
導かれｐ布（２）　（３）間で脱水が進行する。最後に
汚泥は高圧ローラ（７）と加圧ベルト（１）の背面の間
に移行し高圧搾されてＥ部より排出される。最終工程は
高圧ローラ（７）と３個のローラ（１１）（２）（至）
より構成され、（ロ）（６）（至）の３個のローラには
高圧ペル）　（１）　６１巻回されローラー０］）を油
圧シリ／ダー等で調節することにより加圧ベルト（１）
Ｋ任意の高張力を与えることが出来る。The sludge flocculated by the addition of a polymer flocculant is transferred to the lower part F in part A.
Furnace cloth (3) is supplied to the soil, distributed uniformly in the width direction, and dewatered by gravity, and solids remain in the furnace cloth (3) soil, and moisture flows downward to concentrate the sludge. Next, as the gap between the upper door cloth (2) and the lower door cloth (3) decreases from this sludge layer ViB, pressurization and dewatering occurs. Furthermore, the dewatering progresses between the p-cloths (2) and (3) as they are guided successively to groups of shearing press rollers (4) to (6) having different diameters. Finally, the sludge moves between the high pressure roller (7) and the back surface of the pressure belt (1), is highly compressed, and is discharged from section E. The final step is the high pressure roller (7) and three rollers (11) (2) (to)
The three rollers (B), (6), and (to) are equipped with a high pressure belt (1), which is wound around 61 times and the roller 0]) is adjusted by a hydraulic cylinder/der, etc. )
K: Any high tension can be applied.

上記加圧ベルトは第（２）図に示すように線状体をコイ
ル状α４に作成し、これらを噛合せて出来る共通孔に接
続部材（至）を挿入し、この作業を繰返すことによって
長尺のベルトを得る。製作されたスパイラルベルトは寸
法安定性を向上させるため定張力下で温［１３０℃〜１
８０℃において熱処理を行う。As shown in Fig. (2), the above pressure belt is made by making a linear body into a coil shape α4, inserting a connecting member (toward) into a common hole created by meshing these, and repeating this process. Obtain a shaku belt. The manufactured spiral belt was heated under constant tension at a temperature [130°C to 1°C] to improve dimensional stability.
Heat treatment is performed at 80°C.

又場合によっては加熱ローラーによっていわゆるカレン
ダー掛けを行いそのコイルの形状を調整する場合もある
。ベルトの両耳部は樹脂によって固着するか、接続部材
を内部に折り曲げるなどの方法で接続部材とスパイラル
コイルの固定をはかる。In some cases, the shape of the coil may be adjusted by performing so-called calendering using a heated roller. Both ears of the belt are fixed with resin, or the connecting member and the spiral coil are fixed by a method such as bending the connecting member inward.

こうして作られたスパイラルベルトは接続部材のところ
で自由に屈曲するため高圧搾ロールに押しつけられても
ロールの曲率に無理なく沿って油圧装置によって印加さ
れた面圧が均一に戸布全幅に加わるので効率よく脱水す
ることができる。The spiral belt made in this way bends freely at the connecting member, so even when pressed against a high-pressure roll, it easily follows the curvature of the roll, and the surface pressure applied by the hydraulic device is applied uniformly to the entire width of the door, making it more efficient. Can be dehydrated well.

実施例 ポリエステルモノフィラメント糸α７簡φで短径４ｍ＋
、長径７２＋ｗ＋のスパイラルコイルを作り、ポリエス
テル七ノフィラメント糸α９ｍφを接続部材トしてスパ
イラルベルトを製作した。Example polyester monofilament yarn α7 simple diameter, short diameter 4m+
A spiral coil with a major diameter of 72+w+ was made, and a spiral belt was made by using a polyester seven filament yarn α9mφ as a connecting member.

このスパイラルベルトを５（αの張力下、１６０℃で熱
処理して高圧ベルトを製作しこれを下記の表のように本
案の実施例として比較例μ共に脱水テストを行った。This spiral belt was heat-treated at 160° C. under a tension of 5 (α) to produce a high-pressure belt, which was subjected to a dehydration test as an example of the present invention and a comparative example μ as shown in the table below.

第−表　脱水テスト結果 注）０印加圧力１（驚〕 Ｏ各回の含水率は脱水ケーキ５ケ所より１０　ｆずつを
採増し、その含水率を測定した。Table - Dehydration test results Note) 0 Applied pressure 1 (surprise) O For each time, 10 f was added from 5 locations of the dehydrated cake and the moisture content was measured.

結果から明らかなように本発明の高圧スパイラルベルト
を使用した時の汚泥の含水率は比較例より少く所期の目
的を達することか出来た。スパイラルベルトには目のふ
さがっている部分がなく、空隙が大きくて水の流路が自
由にとれるので圧撞によって押し出場れた水は一部にた
まることなくすぐ流れ落ちる。そのためケーキ含水率の
ムラも少く高脱水ケーキが得られる。またこのベルトは
コイルを順に連結した構造であるため脱水装置に増り付
けてエンドレスにすることが容易であり両端のループを
噛合せて接続部材を手で挿通するだけでできる。同じよ
うに堆り外しも接続部材を１本抜きとるだけでできる。As is clear from the results, when the high-pressure spiral belt of the present invention was used, the water content of the sludge was lower than that of the comparative example, and the desired objective could be achieved. Spiral belts do not have any obstructed parts and have large gaps that allow water to flow freely, so water that is pushed out by pressure flows down immediately without collecting in one part. Therefore, a highly dehydrated cake with less unevenness in cake moisture content can be obtained. Moreover, since this belt has a structure in which coils are connected in sequence, it is easy to add it to the dewatering device to make it endless, and this can be done simply by meshing the loops at both ends and inserting the connecting member by hand. Similarly, removal can be done by simply removing one connecting member.

万一ベルトの一部が事故等によって破損しても、破損部
両端の接続部材を抜き破損部だけ１１去って同サイズの
ベルトを継ぎ合せればよく補修が容易である。以上のよ
うに本発明の加圧ベルトは高圧搾脱水機に用いて脱水ム
ラがなく、高脱水効果が得られる上に装着作業が容易で
あるという利点がありその価値はきわめて高い。Even if a part of the belt should be damaged due to an accident or the like, it can be easily repaired by simply removing the connecting members at both ends of the damaged part, removing only the damaged part 11, and joining a belt of the same size. As described above, the pressure belt of the present invention has the advantage that it can be used in a high-pressure dehydrator without uneven dehydration, provides a high dehydration effect, and is easy to install, so its value is extremely high.

【図面の簡単な説明】[Brief explanation of the drawing]

図面は本発明の実施例であって第１図は高圧ベルトプレ
ス脱水機の全体機構の概略縦断面図を示す１例であり、
第２図はスパイラルベルトの平面図、第３図はその側面
図である。 （１）・・・加圧ベルト（２）・・・上部炉布（３）・
・・下部炉布　　　　（４）　（５）　（６）・・・圧
搾ローラ　　　　′（７）・・・高圧ローラ　　　α１
）ＵＵ・・・加圧ベルト用ローラＡ−Ｂ・・重力脱水工
程 Ｂ−Ｅ・・・圧搾剪断脱水工程 Ｃ−Ｄ・・・高圧搾工程 ａ４・・・スパイラルコイル　Ｑ！１９・・・接続部材
０傍・・・挿入部材 特許出願人　　敷島カンバス株式会社 第１図 史 バ ヘへ 第２図 １ｂ 第３図 ｆ　　続　　補　　１１　　　占 昭和５７ｆ１１１月４１１ 昭和５７−ｆ゛１１目　６日差出 待詐庁１☆’ｌ’ｃ？’＋　　　杉　　１１　　夫　　
殿１、串ｌ牛の表小 昭和５７年　持ｌ−１第　０６４５１５　　　号２、発
明の名称 ベルトプレス ３、補正をすると 事件とび）１４４Ｉ係　　特許出願入 居　　−リ「　　　　大！９ｚ　＋１ｉ　（ｕ　１．Ａ
’ｌ備後町３　Ｉ’ｌ＋　３　５番地名　　称　　　　
＃（カンバス株式会社４、補ＣＦ命令の１１付　自発 ５、補正の対ψ 実験４＋Ｍ第５１０（７）（１＊　ｌ　７６−９　１　
ヲ１７　６−　　５　ｌ　Ｔ：、ｆＴｌ：。 （２）明細六の図面（第一図）の符号１ケ所引出線を別
紙の通り訂正。 第１図 ＼The drawings show an embodiment of the present invention, and FIG. 1 is an example showing a schematic longitudinal sectional view of the entire mechanism of a high-pressure belt press dehydrator.
FIG. 2 is a plan view of the spiral belt, and FIG. 3 is a side view thereof. (1)...Pressure belt (2)...Upper furnace cloth (3)
...Lower furnace cloth (4) (5) (6)...Squeezing roller '(7)...High pressure roller α1
)UU...Roller for pressure belt A-B...Gravity dehydration process B-E...Compression shearing dehydration process C-D...High compression process a4...Spiral coil Q! 19... Connecting member 0 side... Insert member patent applicant Shikishima Canvas Co., Ltd. 1. History of history 2. 1b. 6 days submission fraud agency 1☆'l'c? '+ cedar 11 husband
Tono 1, Small skewered beef table 1981 Mochi l-1 No. 064515 2, Name of the invention Belt press 3, If amended, the case will be skipped) 144I Patent application filed - ``Large!9z +1i (u 1. A
'l Bingocho 3 I'l+ 3 5th name
# (Canvas Co., Ltd. 4, supplementary CF instruction with 11 Spontaneous 5, correction pair ψ Experiment 4 + M No. 510 (7) (1 * l 76-9 1
wo17 6-5 l T:, fTl:. (2) The leader line at one place in the drawing (Figure 1) in Specification 6 has been corrected as shown in the attached sheet. Figure 1\

Claims (1)

【特許請求の範囲】 １２枚の炉布の間に汚泥を供給し汚泥を脱水するベルト
プレス型汚泥脱水機において、線材をコイル状に巻いた
スパイラルコイルを噛合せ出来た共通孔に線状の接続部
材を挿通し順に連結してンート状になした圧搾用スパイ
ラルベルトで、間に汚泥をはさんだ炉布の外側から高面
圧を印加して汚泥を圧搾脱水するベルトプレス型汚泥脱
水機における加圧ベルト０ ２　加圧用スパイラルベルトのスパイラルコイル及び接
続部材が合成樹脂線状体から出来ており、このスパイラ
ルベルトが定張力下で熱処理式れていることを特徴とす
る特許請求の範理第−項記載の加圧ベルト。 ＆　合成樹脂線状体がポリエチレンテレフタレート又は
ポリブチレンテレフタレート樹脂から出来ている特許請
求範囲第−項及び第二項記載の加圧ベルト。[Claims] In a belt press type sludge dewatering machine that supplies sludge between 12 furnace cloths and dehydrates the sludge, a wire is inserted into a common hole in which a spiral coil made of wire is meshed. In a belt press type sludge dewatering machine that compresses and dewaters sludge by applying high surface pressure from the outside of the furnace cloth with sludge sandwiched between the spiral belts for squeezing, which are made into a belt-like shape by connecting connecting members in the order in which they are inserted. Pressure Belt 0 2 The spiral coil and connecting member of the pressure spiral belt are made of a synthetic resin linear body, and the spiral belt is heat-treated under constant tension. - Pressure belt as described in section. & The pressure belt according to claims 1 and 2, wherein the synthetic resin linear body is made of polyethylene terephthalate or polybutylene terephthalate resin.