JP2000176495A - Device and method for drying sludge - Google Patents
Device and method for drying sludgeInfo
- Publication number
- JP2000176495A JP2000176495A JP10354773A JP35477398A JP2000176495A JP 2000176495 A JP2000176495 A JP 2000176495A JP 10354773 A JP10354773 A JP 10354773A JP 35477398 A JP35477398 A JP 35477398A JP 2000176495 A JP2000176495 A JP 2000176495A
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- dryer
- thin film
- centrifugal
- drying
- 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
Links
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- Drying Of Solid Materials (AREA)
- Treatment Of Sludge (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、下水汚泥、ヘド
ロ、産業廃棄物汚泥等の有機および無機汚泥を乾燥処理
する汚泥乾燥処理装置およびその処理方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sludge drying apparatus for drying organic and inorganic sludge such as sewage sludge, sludge, and industrial waste sludge, and a method of treating the same.
【０００２】[0002]
【従来の技術】一般に下水や排水処理により発生する汚
泥は、脱水処理により含水率を低下させた脱水ケーキと
して排出される。このような脱水ケーキはコンポスト化
あるいは焼却処分して減容化して埋め立て処分、海洋投
棄処分がなされている。さらに最近では、再資源化が進
み、汚泥を溶融化しスラブ化して建設用材として有効利
用できるように試みられている。2. Description of the Related Art Generally, sludge generated by sewage or wastewater treatment is discharged as a dewatered cake having a reduced water content by dewatering treatment. Such dewatered cakes are reduced in volume by composting or incineration to landfill disposal and ocean dumping. More recently, recycling has been advanced, and attempts have been made to melt sludge into slabs so that they can be effectively used as construction materials.
【０００３】これら汚泥の最終処分の前工程として、脱
水ケーキの乾燥処理が必要となる。汚泥の乾燥処理方法
としては、乾燥機内に汚泥を直接投入すると共に、熱風
を送り込み乾燥処理する方法（直接乾燥方法）と、乾燥
機内にジャケット、チューブ、ディスク等の伝熱面を配
設し、その内部に加圧蒸気等の熱媒体を流すとともに、
ドラムやディスクを回転させながら乾燥機内部に脱水ケ
ーキを投入して乾燥処理する方法（間接乾燥方法）があ
る。[0003] As a pre-process for the final disposal of these sludges, a drying treatment of the dewatered cake is required. As a method of drying sludge, a method of directly feeding sludge into a dryer and sending hot air to perform a drying process (direct drying method), and providing a heat transfer surface such as a jacket, a tube, and a disk in the dryer, While flowing a heat medium such as pressurized steam inside
There is a method of injecting a dehydrated cake into a dryer while rotating a drum or a disc and performing a drying treatment (indirect drying method).
【０００４】[0004]
【発明が解決しようとする課題】上述した従来の乾燥方
法のうち、直接乾燥方法は排ガス量が多く大型の排ガス
処理設備が必要となる。一方、間接乾燥方法では、脱水
ケーキは非常に付着性が強いため、伝熱面へ汚泥が付着
し乾燥効率が悪くなることがある。さらに、直接乾燥方
法および間接乾燥方法両者において、粘着性の高い汚泥
を扱うため汚泥が塊状になって乾燥効率が悪くなり、そ
のため乾燥機が大型になったり、複雑な構造になり設備
費が高くなる問題がある。Of the above-mentioned conventional drying methods, the direct drying method has a large amount of exhaust gas and requires large-scale exhaust gas treatment equipment. On the other hand, in the indirect drying method, since the dewatered cake has a very strong adhesive property, sludge may adhere to the heat transfer surface and the drying efficiency may be reduced. Furthermore, in both the direct drying method and the indirect drying method, sludge becomes clumpy and sluggish in drying efficiency because sludge having a high viscosity is used, so that the dryer becomes large or has a complicated structure, resulting in high equipment costs. There is a problem.
【０００５】本発明は、このような点を考慮してなされ
たものであり、付着性が高く、かつ臭気のある汚泥を容
易に乾燥処理ができる汚泥乾燥処理装置およびその処理
方法を提供することを目的とする。[0005] The present invention has been made in view of the above points, and provides a sludge drying treatment apparatus and a treatment method capable of easily drying sludge having high adhesion and odor. With the goal.
【０００６】[0006]
【課題を解決するための手段】本発明は、汚泥が投入さ
れる伝熱胴と、汚泥を伝熱胴内に引延ばすブレードを有
し伝熱胴内に回転自在に配置された主軸とを有する遠心
薄膜乾燥機と、遠心薄膜乾燥機の下流側に配置され、汚
泥が投入される回転ドラムと、回転ドラムの内面に設け
られた伝熱管とを有する回転乾燥機と、を備えたことを
特徴とする汚泥乾燥処理装置、および請求項１記載の汚
泥乾燥処理装置を用いた処理方法において、遠心薄膜乾
燥機により汚泥を脱水乾燥させて、汚泥の含水率を３５
〜６５重量％とする工程と、遠心薄膜乾燥機からの汚泥
を更に回転乾燥機により脱水乾燥させる工程と、を備え
たことを特徴とする汚泥乾燥処理方法である。SUMMARY OF THE INVENTION The present invention comprises a heat transfer cylinder into which sludge is introduced and a main shaft having a blade for extending the sludge into the heat transfer cylinder and rotatably disposed in the heat transfer cylinder. A centrifugal thin film dryer, a rotary drier disposed downstream of the centrifugal thin film dryer, into which sludge is charged, and a rotary dryer having a heat transfer tube provided on the inner surface of the rotary drum. The sludge drying treatment apparatus according to claim 1, wherein the sludge is dehydrated and dried by a centrifugal thin film dryer to reduce the water content of the sludge to 35.
A sludge drying treatment method comprising: a step of adjusting the sludge from the centrifugal thin film drier to a dehydration drying by a rotary drier.
【０００７】本発明によれば、汚泥を遠心薄膜乾燥機に
より、脱水乾燥して付着性の低い汚泥とし、この汚泥を
回転乾燥機により脱水乾燥することにより、取扱いが容
易な粒状汚泥を得ることができる。According to the present invention, sludge is dehydrated and dried by a centrifugal thin film dryer to obtain low-adhesive sludge, and the sludge is dehydrated and dried by a rotary dryer to obtain granular sludge which is easy to handle. Can be.
【０００８】[0008]
【発明の実施の形態】第１の実施の形態 以下、図面により本発明の実施の形態について説明す
る。図１乃至図４は、本発明の第１の実施の形態を示す
図である。DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment An embodiment of the present invention will be described below with reference to the drawings. 1 to 4 show the first embodiment of the present invention.
【０００９】図１に示すように、汚泥乾燥処理装置は、
約９９〜９８％の原汚泥１を収容する汚水タンク２と、
凝集剤３を収容する凝集剤タンク４と、原汚泥１と凝集
剤３をそれぞれ混合し含水率８５％程度に遠心濃縮して
汚泥の脱水ケーキを得る遠心濃縮機５と、汚泥の脱水ケ
ーキを一次乾燥する遠心薄膜乾燥機６と、遠心薄膜乾燥
機６から排出された汚泥を二次乾燥する伝熱受熱型の回
転乾燥機７とを備えている。[0009] As shown in FIG.
A sewage tank 2 containing about 99 to 98% of raw sludge 1;
A coagulant tank 4 for accommodating the coagulant 3, a centrifugal concentrator 5 for mixing the raw sludge 1 and the coagulant 3 and centrifugally concentrating them to a water content of about 85% to obtain a dewatered cake of sludge; A centrifugal thin film dryer 6 for primary drying and a heat transfer heat receiving rotary dryer 7 for secondary drying of sludge discharged from the centrifugal thin film dryer 6 are provided.
【００１０】遠心薄膜乾燥機６および回転乾燥機７の機
内の汚泥から蒸発する臭気を含む蒸気は、取り出され
て、冷却洗浄器８に導かれる。そして冷却洗浄器８から
のガスは、ガス管５０を経て一部が回転乾燥機７に環流
し、残りは脱臭装置９およびフィルタ１０を介して大気
に放出される。また遠心薄膜乾燥機６および回転乾燥機
７へは、ボイラユニット１１で発生した加圧蒸気（熱媒
体）が供給管４８から送られ、遠心薄膜乾燥機６および
回転乾燥機７からの蒸気は戻り管４９により戻される。
回転乾燥機７で乾燥した乾燥汚泥１２はベルトコンベア
１３により搬送され、製品ホッパ１４内に一次的に保管
され、焼却・溶融化あるいはガス化溶融化する焼却・溶
融炉（再資源化処理）１５に送られて焼却・溶融化ある
いはガス化溶融される。[0010] Steam containing odor evaporating from the sludge inside the centrifugal thin film dryer 6 and the rotary dryer 7 is taken out and guided to the cooling and washing device 8. Then, a part of the gas from the cooling and washing device 8 is circulated to the rotary dryer 7 through the gas pipe 50, and the rest is discharged to the atmosphere through the deodorizing device 9 and the filter 10. Pressurized steam (heat medium) generated in the boiler unit 11 is sent from the supply pipe 48 to the centrifugal thin film dryer 6 and the rotary dryer 7, and the steam from the centrifugal thin film dryer 6 and the rotary dryer 7 returns. Returned by tube 49.
The dried sludge 12 dried by the rotary dryer 7 is conveyed by a belt conveyor 13, temporarily stored in a product hopper 14, and incinerated / melted or gasified and melted in an incineration / melting furnace (recycling process) 15. To be incinerated, melted, or gasified and melted.
【００１１】また、焼却・溶融炉１５で発生する熱は排
熱回収ボイラ１６で回収され、加圧蒸気ライン１７を介
して遠心薄膜乾燥機６および回転乾燥機７を加熱する熱
媒体に加えられる。また、冷却洗浄器８からのガスを分
岐管５０ａにより焼却・溶融炉１５へ送って焼却脱臭し
てもよい。The heat generated in the incineration / melting furnace 15 is recovered by an exhaust heat recovery boiler 16 and added to a heat medium for heating the centrifugal thin film dryer 6 and the rotary dryer 7 via a pressurized steam line 17. . Further, the gas from the cooling / cleaning device 8 may be sent to the incineration / melting furnace 15 through the branch pipe 50a for incineration and deodorization.
【００１２】次に遠心薄膜乾燥機６について説明する。
遠心薄膜乾燥機６は図２及び図３に示すように、薄肉の
伝熱胴２１と、伝熱胴２１の内部に伝熱胴２１と同軸に
設けられた主軸２２とを有し、この主軸２２は駆動モー
タ２３およびＶベルト２３ａによって回転駆動されるよ
うになっている。Next, the centrifugal thin film dryer 6 will be described.
As shown in FIGS. 2 and 3, the centrifugal thin film dryer 6 has a thin heat transfer cylinder 21 and a main shaft 22 provided inside the heat transfer cylinder 21 and coaxially with the heat transfer cylinder 21. Reference numeral 22 is adapted to be rotationally driven by a drive motor 23 and a V-belt 23a.
【００１３】ここで図２（Ａ）は遠心薄膜乾燥機６の全
体図、図２（Ｂ）は図２（Ａ）のＢ部拡大図、図２
（Ｃ）は図２（Ａ）のＣ部拡大図、図２（Ｄ）は図２
（Ａ）のＤ部拡大図、図３は図２（Ａ）のＥ−Ｅ線断面
図である。2 (A) is an overall view of the centrifugal thin film dryer 6, FIG. 2 (B) is an enlarged view of a portion B in FIG. 2 (A), and FIG.
2C is an enlarged view of a portion C in FIG. 2A, and FIG.
FIG. 3A is an enlarged view of a portion D, and FIG. 3 is a sectional view taken along line EE of FIG.
【００１４】また、主軸２２の上部には分配リング２５
が設けられ、被処理物投入口としての汚泥投入口２４か
ら供給された汚泥３６は、分配リング２５を通って伝熱
胴２１の内面に均一に投入される。さらに、主軸２２に
は伝熱胴２１内に分散された汚泥３６を薄膜状にするた
めのブレード２６が、軸方向および円周方向に複数段・
複数枚取付けられている。このブレード２６はヒンジ２
７を介して主軸２２に取付けられている。A distribution ring 25 is provided above the main shaft 22.
Is provided, and the sludge 36 supplied from the sludge input port 24 as a processing object input port is uniformly supplied to the inner surface of the heat transfer drum 21 through the distribution ring 25. Further, the main shaft 22 is provided with a plurality of blades 26 for forming sludge 36 dispersed in the heat transfer drum 21 into a thin film in the axial direction and the circumferential direction.
Multiple pieces are installed. This blade 26 is a hinge 2
7, and is attached to the main shaft 22.
【００１５】ところで、主軸２２は伝熱胴２１の両端部
に設けられた軸受２８、２９により支持され、下部軸受
２９はスポーク３０により伝熱胴２１の下端に保持され
るとともに、スポーク３０の下部には排出口３１が形成
されている。さらに、伝熱胴２１の上部には、汚泥３６
から発生する蒸発蒸気を排気するための排気口３２が設
けられ、排出口３２からの蒸気は冷却洗浄器８へ送られ
る。さらに、伝熱胴２１の外側には、汚泥３６の脱水・
乾燥を行うための熱源となる蒸気を通す蒸気ジャケット
３３が設けられ、この蒸気ジャケット３３にはボイラユ
ニット１１で生じた蒸気が加圧蒸気入り口３４から流入
するとともに、蒸気ジャケット３３内の蒸気は加圧蒸気
出口３５から流出してボイラユニット１１へ戻される。The main shaft 22 is supported by bearings 28 and 29 provided at both ends of the heat transfer drum 21, and the lower bearing 29 is held at the lower end of the heat transfer drum 21 by spokes 30, Is formed with a discharge port 31. Further, sludge 36 is provided on the upper portion of the heat transfer drum 21.
An exhaust port 32 for exhausting the evaporated vapor generated from the exhaust gas is provided, and the vapor from the exhaust port 32 is sent to the cooling and washing device 8. Further, on the outside of the heat transfer drum 21, dewatering of the sludge 36 is performed.
A steam jacket 33 for passing steam as a heat source for drying is provided. Into the steam jacket 33, steam generated in the boiler unit 11 flows from a pressurized steam inlet 34, and steam in the steam jacket 33 is added. It flows out from the pressurized steam outlet 35 and returns to the boiler unit 11.
【００１６】次に回転乾燥機７について説明する。回転
乾燥機７はドラム７ａと、ドラム７ａの内面に設けられ
た多数の伝熱チューブ７ｂとを有し、ドラム７ａを回転
させることにより伝熱チューブ７ｂと汚泥との接触が行
われて、乾燥し、臭気のない低含水率の乾燥汚泥が得ら
れる構造になっている。Next, the rotary dryer 7 will be described. The rotary dryer 7 has a drum 7a, and a number of heat transfer tubes 7b provided on the inner surface of the drum 7a. By rotating the drum 7a, the heat transfer tube 7b is brought into contact with the sludge, and is dried. In addition, the structure is such that dry sludge with no odor and low moisture content can be obtained.
【００１７】次に汚泥処理方法について説明する。図１
に示すように、汚水タンク２から原汚泥１が遠心濃縮機
５へ送られ、同時に凝集剤タンク４内の凝集剤３が遠心
濃縮機５へ送られる。遠心濃縮機５において、原汚泥１
と凝集剤３とが混合され、原汚泥は所定含水率を有する
まで汚水乾燥される。Next, a method for treating sludge will be described. FIG.
As shown in (1), the raw sludge 1 is sent from the sewage tank 2 to the centrifugal concentrator 5, and at the same time, the coagulant 3 in the coagulant tank 4 is sent to the centrifugal concentrator 5. In the centrifugal concentrator 5, raw sludge 1
And the flocculant 3 are mixed, and the raw sludge is sewage-dried until it has a predetermined moisture content.
【００１８】遠心濃縮機５により脱水された汚泥は、汚
泥３６となって遠心薄膜乾燥機６へ送られる。The sludge dewatered by the centrifugal concentrator 5 is sent to the centrifugal thin film dryer 6 as sludge 36.
【００１９】遠心薄膜乾燥機６において、汚泥投入口２
４から伝熱胴２１内に供給された汚泥３６は、主軸２２
とともに回転するブレード２６によって掻き取られ、伝
熱胴２１内面に薄膜状に引き延ばされる。そして、薄膜
状になった汚泥３６は重力と次々に供給される新しい汚
泥の圧力によって、少しづつ下方に進む。その際、伝熱
胴２１外側の蒸気ジャケット３３に供給されている加熱
蒸気によって、汚泥３６は伝熱胴２１により加熱され
る。その後、汚泥３６はその水分が徐々に脱水され、乾
燥汚泥となり、伝熱胴２１の下端に設けられた排出口３
１より排出される。一方、汚泥から蒸発した蒸気は排気
口３２から抽気し排気される。In the centrifugal thin film dryer 6, the sludge inlet 2
4 supplied to the heat transfer drum 21 from the main shaft 22
The heat transfer drum 21 is scraped off by the rotating blade 26 and is stretched into a thin film on the inner surface of the heat transfer drum 21. Then, the sludge 36 in the form of a thin film gradually moves downward due to gravity and the pressure of new sludge supplied one after another. At that time, the sludge 36 is heated by the heat transfer cylinder 21 by the heating steam supplied to the steam jacket 33 outside the heat transfer cylinder 21. Thereafter, the sludge 36 is gradually dehydrated to become dry sludge, and the discharge port 3 provided at the lower end of the heat transfer cylinder 21 is discharged.
It is discharged from 1. On the other hand, the steam evaporated from the sludge is extracted and exhausted from the exhaust port 32.
【００２０】遠心薄膜乾燥機６における、汚泥３６の処
理において、汚泥３６が乾燥するに従い、粘性が増加
し、図４（Ａ）（Ｂ）（Ｃ）に示すように汚泥３６の形
状が変化する。In the treatment of the sludge 36 in the centrifugal thin film dryer 6, the viscosity increases as the sludge 36 dries, and the shape of the sludge 36 changes as shown in FIGS. 4 (A), 4 (B) and 4 (C). .
【００２１】図４（Ａ）は、伝熱胴２１の上方の加熱ゾ
ーンから中央の蒸発ゾーンにおいて、汚泥３６が薄膜状
に形成され、効率良く蒸発が進む領域（定率乾燥領域）
を示している。この場合、汚泥が薄膜状に形成されてい
る領域の含水率は６５重量％以上である。FIG. 4A shows a region where the sludge 36 is formed in a thin film shape from the heating zone above the heat transfer drum 21 to the central evaporation zone, and evaporation proceeds efficiently (constant-rate drying region).
Is shown. In this case, the water content in the region where the sludge is formed in the form of a thin film is 65% by weight or more.
【００２２】さらに汚泥３６が伝熱胴２１内部を下方に
移動し、乾燥が進行すると、図４（Ｂ）に示すような汚
泥３６の造粒領域となる。この造粒領域の含水率は３５
〜６５重量％である。さらに、乾燥が進むと図４（Ｃ）
に示すように、造粒した汚泥３６がブレード２６前面に
堆積しながら乾燥する領域（減率乾燥領域）に入る。こ
の減率乾燥領域では、乾燥速度が著しく低下し、若干の
含水率を下げるのに広い範囲の伝熱胴が必要になる。Further, as the sludge 36 moves downward inside the heat transfer drum 21 and the drying proceeds, the sludge 36 becomes a granulation area as shown in FIG. 4B. The water content of this granulation area is 35
~ 65% by weight. Further, as drying proceeds, FIG.
As shown in (2), the sludge 36 that has been granulated enters a region where the sludge is dried while accumulating on the front surface of the blade 26 (a reduced-rate drying region). In this reduced-rate drying region, the drying speed is significantly reduced, and a wide range of heat transfer cylinders is required to slightly reduce the water content.
【００２３】本実施の形態では遠心薄膜乾燥機６から排
出される汚泥の含水率は３５〜６５重量％となり、粒状
の汚泥を短時間に効率良く乾燥できる。この粒状の乾燥
汚泥は脱粋ケーキに比べて付着性が格段に低下してい
る。In the present embodiment, the water content of the sludge discharged from the centrifugal thin film dryer 6 is 35 to 65% by weight, and the granular sludge can be efficiently dried in a short time. This granular dried sludge has significantly reduced adhesion compared to the exfoliated cake.
【００２４】遠心薄膜乾燥機６から排出した汚泥３６は
粒状化するとともに、付着性が低下しているため、汚泥
３６を回転乾燥機７に投入しても、回転乾燥機７のドラ
ム７ａ内の伝熱チューブ７ｂあるいはドラム７ａの内壁
面に汚泥３６が付着せず、粒状を保ちながら１０％程度
まで安定して粒状を保ちながら乾燥する。Since the sludge 36 discharged from the centrifugal thin film dryer 6 is granulated and has reduced adhesion, even if the sludge 36 is introduced into the rotary dryer 7, the sludge 36 in the drum 7 a of the rotary dryer 7 is not removed. The sludge 36 does not adhere to the inner wall surface of the heat transfer tube 7b or the drum 7a, and is dried up to about 10% while maintaining the granularity while maintaining the granularity.
【００２５】回転乾燥機７からの脱水汚泥３６は、ベル
トコンベア１３を経て乾燥汚泥１２として製品ホッパ１
４内に保管され、焼却・溶融炉１５で焼却される。The dehydrated sludge 36 from the rotary dryer 7 passes through a belt conveyor 13 and becomes dried sludge 12 as a product hopper 1.
4 and incinerated in an incineration / melting furnace 15.
【００２６】また、遠心薄膜乾燥機６および回転乾燥機
７からの蒸気は冷却洗浄器８へ送られ、冷却洗浄器８か
らのガスは脱臭装置９およびフィルタ１０を経て外部へ
放出される。The steam from the centrifugal thin film dryer 6 and the rotary dryer 7 is sent to the cooling and washing device 8, and the gas from the cooling and washing device 8 is discharged outside through the deodorizing device 9 and the filter 10.
【００２７】図１乃至図４において、遠心薄膜乾燥機６
および回転乾燥機７により、含水率が極めて低く、粒状
で扱いが容易な乾燥汚泥１２を得ることができ、この乾
燥汚泥１２を焼却・溶融炉１５において一定の温度で焼
却することができる。また焼却・溶融炉１５において発
生するエネルギを排熱回収ボイラ１６で回収して遠心薄
膜乾燥機６および回転乾燥機７の熱媒体（加圧蒸気）と
して利用することができ、汚泥処理にかかる燃料を大幅
に節約できる。1 to 4, a centrifugal thin film dryer 6
With the rotary dryer 7, it is possible to obtain dry sludge 12 having an extremely low moisture content and being granular and easy to handle, and this dry sludge 12 can be incinerated in the incineration / melting furnace 15 at a constant temperature. Further, the energy generated in the incineration / melting furnace 15 is recovered by the waste heat recovery boiler 16 and can be used as a heat medium (pressurized steam) for the centrifugal thin film dryer 6 and the rotary dryer 7. Can save a lot.
【００２８】また、遠心薄膜乾燥機６および回転乾燥機
７から発生する臭気を含む蒸発蒸気を冷却洗浄器８、脱
臭装置９およびフィルタ１０において処理する構成にな
っているため、装置がコンパクトで臭気を外部に漏らす
ことなく、ガス処理が可能である。Further, since the evaporative vapor containing odor generated from the centrifugal thin film dryer 6 and the rotary dryer 7 is processed in the cooling washer 8, the deodorizer 9 and the filter 10, the apparatus is compact and odorous. Can be gas-processed without leaking to the outside.
【００２９】本実施の形態によれば、汚泥を蒸発量が多
く乾燥速度が高い遠心薄膜乾燥機６で乾燥させ、次に汚
泥を減率乾燥に優れた伝熱受熱型の回転式乾燥機７で乾
燥させたので、両者の優れた乾燥特性が発揮でき、粘着
性の高い汚泥を効率良く取り扱い容易な乾燥汚泥とする
ことができる。また発生ガス量が少なく脱臭装置９がコ
ンパクトになる。さらに焼却・溶融炉１５におる汚泥焼
却あるいはガス化で発生するエネルギを排熱回収ボイラ
１６で回収して熱媒体（加圧蒸気）としているので、汚
泥処理にかかる燃料が大幅に節約できる。According to the present embodiment, the sludge is dried by the centrifugal thin-film dryer 6 having a large evaporation amount and a high drying speed, and then the sludge is dried by the heat transfer heat receiving type rotary dryer 7 which is excellent in the rate of drying. , It is possible to exhibit excellent drying characteristics of both, and it is possible to make sludge having high tackiness into dry sludge which can be efficiently handled and easily handled. Further, the amount of generated gas is small and the deodorizing device 9 is compact. Further, since the energy generated by sludge incineration or gasification in the incineration / melting furnace 15 is recovered by the exhaust heat recovery boiler 16 and used as a heat medium (pressurized steam), fuel for sludge treatment can be largely saved.
【００３０】第２の実施の形態 次に本発明の第２の実施例について図５により説明す
る。図５に示す第２の実施の形態は、遠心濃縮機５と遠
心薄膜乾燥機６との間に石灰混入装置（ミキサ）４３を
設けたものであり、他は図１乃至図４に示す第１の実施
の形態と略同一である。図５において、図１乃至図４に
示す第１の実施の形態と同一部分には同一符号を付して
詳細な説明は省略する。Second Embodiment Next, a second embodiment of the present invention will be described with reference to FIG. In the second embodiment shown in FIG. 5, a lime mixing device (mixer) 43 is provided between the centrifugal concentrator 5 and the centrifugal thin film dryer 6, and the other is the second embodiment shown in FIGS. This is substantially the same as the first embodiment. In FIG. 5, the same parts as those of the first embodiment shown in FIGS. 1 to 4 are denoted by the same reference numerals, and detailed description will be omitted.
【００３１】図５において、遠心濃縮機５の下流側にミ
キサ４３が設けられ、遠心濃縮機５で得られた脱水汚泥
と石灰タンク４１に貯留した石灰４２がミキサ４３に送
られ、このミキサ４３で混練される。ミキサ４３で混練
した汚泥は遠心薄膜乾燥機６で脱水乾燥する。In FIG. 5, a mixer 43 is provided on the downstream side of the centrifugal concentrator 5, and the dehydrated sludge obtained by the centrifugal concentrator 5 and the lime 42 stored in the lime tank 41 are sent to the mixer 43. Is kneaded in. The sludge kneaded by the mixer 43 is dehydrated and dried by the centrifugal thin film dryer 6.
【００３２】ミキサ４３内で汚泥に混ぜ合わせる石灰
は、消石灰でも生石灰でもそれぞれの混合物でもよく、
これらの量は適当に調整できる。The lime to be mixed with the sludge in the mixer 43 may be slaked lime, quick lime, or a mixture thereof.
These amounts can be adjusted appropriately.
【００３３】本実施の形態によれば、遠心濃縮機５で発
生した汚泥と少量の石灰をミキサ４３で混合することに
よって予備的に汚泥と石灰との化学反応乾燥を行うこと
ができる。脱水ケーキに例えば生石灰を混合すると、表
面付着水や内部水と水和反応し、消石灰を生じる。消石
灰は疎水性があり、遠心薄膜乾燥機６での乾燥が促進さ
れる。またミキサ４３で消石灰を添加した場合は、化学
反応乾燥はないが、その後の乾燥工程で乾燥性が向上す
る。According to the present embodiment, by mixing the sludge generated in the centrifugal concentrator 5 and a small amount of lime in the mixer 43, the chemical reaction and drying of the sludge and the lime can be preliminarily performed. When, for example, quick lime is mixed with the dehydrated cake, it undergoes a hydration reaction with water adhering to the surface or inside water to produce slaked lime. Slaked lime has hydrophobicity, and drying in the centrifugal thin film dryer 6 is promoted. When slaked lime is added by the mixer 43, there is no chemical reaction drying, but the drying property is improved in the subsequent drying step.
【００３４】第３の実施の形態 次に本発明の第３の実施の形態について図６により説明
する。図６に示す第３の実施の形態は、遠心薄膜乾燥機
５と回転乾燥機７との間に石灰混入装置（ミキサ）４６
を設けたものであり、他は図１乃至図４に示す第１の実
施の形態と略同一である。 Third Embodiment Next, a third embodiment of the present invention will be described with reference to FIG. In the third embodiment shown in FIG. 6, a lime mixing device (mixer) 46 is provided between the centrifugal thin film dryer 5 and the rotary dryer 7.
The other components are substantially the same as those of the first embodiment shown in FIGS.
【００３５】図６において、図１乃至図４に示す第１の
実施の形態と同一部分には同一符号を付して詳細な説明
は省略する。In FIG. 6, the same parts as those in the first embodiment shown in FIGS. 1 to 4 are denoted by the same reference numerals, and detailed description is omitted.
【００３６】図６において、遠心薄膜乾燥機６の下流側
にミキサ４６が設けられ、遠心薄膜乾燥機６で得られた
含水率６０％程度の脱水汚泥と石灰タンク４４に貯留し
た石灰４５がミキサ４６に送られる。汚泥と石灰４５は
ミキサ４６で混練され、混練した汚泥は伝熱受熱型の回
転乾燥機７内で脱水乾燥される。In FIG. 6, a mixer 46 is provided on the downstream side of the centrifugal thin film dryer 6, and the dehydrated sludge having a water content of about 60% obtained by the centrifugal thin film dryer 6 and the lime 45 stored in the lime tank 44 are mixed. Sent to 46. The sludge and lime 45 are kneaded in a mixer 46, and the kneaded sludge is dehydrated and dried in a heat transfer heat receiving type rotary dryer 7.
【００３７】ミキサ４６内で汚泥に混ぜ合わせる石灰
は、消石灰でも生石灰でもそれぞれの混合物でもよく、
これらの量は適当に調整できる。The lime to be mixed with the sludge in the mixer 46 may be slaked lime, quick lime, or a mixture thereof.
These amounts can be adjusted appropriately.
【００３８】本実施の形態によれば、遠心薄膜乾燥機６
で発生した汚泥と少量の生石灰あるいは消石灰を混合す
ることによって、含水率の調整ができる。また汚泥の付
着性が低下し、回転乾燥機７内で汚泥がチューブ７ｂへ
付着することがなくなり、取り扱いが容易な乾燥汚泥を
回収することができる。According to the present embodiment, the centrifugal thin film dryer 6
The water content can be adjusted by mixing a small amount of quicklime or slaked lime with the sludge generated in the above. In addition, the sludge adherence is reduced, and the sludge does not adhere to the tube 7b in the rotary dryer 7, so that dry sludge that is easy to handle can be collected.
【００３９】第４の実施の形態 次に本発明の第４の実施の形態について図７により説明
する。図７に示す第４の実施の形態は、ボイラユニット
１１からの供給管４８を遠心薄膜乾燥機６へ接続してボ
イラユニット１１からの蒸気により遠心薄膜乾燥機６の
伝熱胴２１を加熱するとともに、遠心薄膜乾燥機６から
の蒸気を回転乾燥機７へ連結管５０で導いたものであ
る。回転乾燥機７からの蒸気は戻り管４９によりボイラ
ユニット１１へ戻される。 Fourth Embodiment Next, a fourth embodiment of the present invention will be described with reference to FIG. In the fourth embodiment shown in FIG. 7, the supply pipe 48 from the boiler unit 11 is connected to the centrifugal thin film dryer 6, and the steam from the boiler unit 11 heats the heat transfer drum 21 of the centrifugal thin film dryer 6. At the same time, the steam from the centrifugal thin film dryer 6 is guided to the rotary dryer 7 by the connecting pipe 50. Steam from the rotary dryer 7 is returned to the boiler unit 11 by a return pipe 49.
【００４０】他の構成は図１乃至図４に示す第１の実施
の形態と略同一である。図７において、図１乃至図４に
示す第１の実施の形態と同一部分には同一符号を付して
詳細な説明は省略する。The other structure is substantially the same as that of the first embodiment shown in FIGS. 7, the same parts as those in the first embodiment shown in FIGS. 1 to 4 are denoted by the same reference numerals, and detailed description will be omitted.
【００４１】本実施の形態によれば、汚泥を最初に脱水
乾燥させるとともに脱水のために大きな熱エネルギが必
要な遠心薄膜乾燥機６へボイラユニット１１からの蒸気
を供給し、その後遠心薄膜乾燥機６からの蒸気を熱エネ
ルギをあまり必要としない回転乾燥機７へ供給するの
で、蒸気の熱エネルギを効率的に利用することができ
る。According to the present embodiment, the sludge is first dewatered and dried, and the steam from the boiler unit 11 is supplied to the centrifugal thin film dryer 6 requiring large heat energy for dewatering. Since the steam from 6 is supplied to the rotary dryer 7 which does not require much heat energy, the heat energy of the steam can be efficiently used.
【００４２】[0042]
【発明の効果】以上のように本発明によれば、付着性が
低く取扱いが容易な粒状の脱水汚泥を容易かつ確実に得
ることができる。As described above, according to the present invention, granular dewatered sludge having low adhesion and easy handling can be obtained easily and reliably.
【図１】本発明の第１実施の形態を示す全体系統図。FIG. 1 is an overall system diagram showing a first embodiment of the present invention.
【図２】遠心薄膜乾燥機の構造図。FIG. 2 is a structural diagram of a centrifugal thin film dryer.
【図３】図２のＥ−Ｅ線断面図。FIG. 3 is a sectional view taken along line EE of FIG. 2;
【図４】乾燥機内部の乾燥汚泥の形状変化を示す説明
図。FIG. 4 is an explanatory view showing a change in the shape of dried sludge inside the dryer.
【図５】本発明の第２実施の形態を示す全体系統図。FIG. 5 is an overall system diagram showing a second embodiment of the present invention.
【図６】本発明の第３実施の形態を示す全体系統図。FIG. 6 is an overall system diagram showing a third embodiment of the present invention.
【図７】本発明の第４実施の形態を示す全体系統図。FIG. 7 is an overall system diagram showing a fourth embodiment of the present invention.
１ 原汚泥 ５ 遠心濃縮機 ６ 遠心薄膜乾燥機 ７ 伝熱受熱型回転乾燥機 ８ 冷却洗浄器 ９ 脱臭装置 １１ ボイラユニット １２ 乾燥汚泥 １５ 焼却・溶融炉 １６ 排熱回収ボイラ ４２ 石灰 ４３ ミキサ ４５ 石灰 ４６ ミキサ REFERENCE SIGNS LIST 1 Raw sludge 5 Centrifugal concentrator 6 Centrifugal thin film dryer 7 Heat transfer heat receiving type rotary dryer 8 Cooling washer 9 Deodorizer 11 Boiler unit 12 Dry sludge 15 Incineration / melting furnace 16 Waste heat recovery boiler 42 Lime 43 Mixer 45 Lime 46 Mixer
フロントページの続き (72)発明者 河 内 恭 三 東京都港区芝浦一丁目１番１号 株式会社 東芝本社事務所内 Ｆターム(参考） 3L113 AA04 AB05 AC05 AC15 AC16 AC21 AC36 AC45 AC46 AC48 AC49 AC56 AC57 AC62 AC63 AC68 AC76 AC79 AC83 AC87 BA37 CA02 DA02 DA05 DA10 DA14 DA19 4D059 AA03 BB01 BB04 BD11 BD12 BD17 BD22 BD24 BD26 BD32 BE38 BE54 BJ00 BK09 CA06 CA14 CA16 CB04 DA04 DA05 EB01 Continuing from the front page (72) Inventor Kyozo Kawauchi 1-1-1, Shibaura, Minato-ku, Tokyo F-term in Toshiba head office (reference) 3L113 AA04 AB05 AC05 AC15 AC16 AC21 AC36 AC45 AC46 AC48 AC49 AC56 AC57 AC62 AC63 AC68 AC76 AC79 AC83 AC87 BA37 CA02 DA02 DA05 DA10 DA14 DA19 4D059 AA03 BB01 BB04 BD11 BD12 BD17 BD22 BD24 BD26 BD32 BE38 BE54 BJ00 BK09 CA06 CA14 CA16 CB04 DA04 DA05 EB01
Claims (5)
内に引延ばすブレードを有し伝熱胴内に回転自在に配置
された主軸とを有する遠心薄膜乾燥機と、 遠心薄膜乾燥機の下流側に配置され、汚泥が投入される
回転ドラムと、回転ドラムの内面に設けられた伝熱管と
を有する回転乾燥機と、 を備えたことを特徴とする汚泥乾燥処理装置。1. A centrifugal thin-film dryer having a heat transfer cylinder into which sludge is introduced, a blade having a blade for extending the sludge into the heat transfer cylinder, and a main shaft rotatably disposed in the heat transfer cylinder; A sludge drying processing device, comprising: a rotary drum that is disposed downstream of a thin film dryer and into which sludge is charged; and a rotary dryer that has a heat transfer tube provided on an inner surface of the rotary drum.
縮する遠心濃縮機を設けたことを特徴とする請求項１記
載の汚泥乾燥処理装置。2. The sludge drying treatment apparatus according to claim 1, further comprising a centrifugal concentrator for centrifugally concentrating the sludge upstream of the centrifugal thin film dryer.
泥中に生石灰または消石灰を混入する石灰混入装置を設
けたことを特徴とする請求項２記載の汚泥乾燥処理装
置。3. A sludge drying treatment apparatus according to claim 2, wherein a lime mixing device for mixing quick lime or slaked lime into the sludge is provided between the centrifugal concentrator and the centrifugal thin film dryer.
泥中に生石灰または消石灰を混入する石灰混入装置を設
けたことを特徴とする請求項１記載の汚泥乾燥処理装
置。4. The sludge drying apparatus according to claim 1, further comprising a lime mixing device for mixing quicklime or slaked lime into the sludge between the centrifugal thin film dryer and the rotary dryer.
処理方法において、 遠心薄膜乾燥機により汚泥を脱水乾燥させて、汚泥の含
水率を３５〜６５重量％とする工程と、 遠心薄膜乾燥機からの汚泥を更に回転乾燥機により脱水
乾燥させる工程と、 を備えたことを特徴とする汚泥乾燥処理方法。5. A process using a sludge drying apparatus according to claim 1, wherein the sludge is dehydrated and dried by a centrifugal thin film drier so that the water content of the sludge is 35 to 65% by weight. A step of further dehydrating and drying the sludge from the drier using a rotary drier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35477398A JP3609636B2 (en) | 1998-12-14 | 1998-12-14 | Sludge drying equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35477398A JP3609636B2 (en) | 1998-12-14 | 1998-12-14 | Sludge drying equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000176495A true JP2000176495A (en) | 2000-06-27 |
| JP3609636B2 JP3609636B2 (en) | 2005-01-12 |
Family
ID=18439816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP35477398A Expired - Fee Related JP3609636B2 (en) | 1998-12-14 | 1998-12-14 | Sludge drying equipment |
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| Country | Link |
|---|---|
| JP (1) | JP3609636B2 (en) |
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| WO2002078931A1 (en) * | 2001-03-29 | 2002-10-10 | Suzuki Kogyo Co. Ltd. | Apparatus for producing foamed moldings, and method for producing laminated foamed moldings and foamed moldings produced thereby |
| JP2005152695A (en) * | 2003-11-20 | 2005-06-16 | Mitsubishi Materials Techno Corp | Method of drying treating object containing residue of food or organic matter generated from water treatment apparatus as component |
| JP2007167782A (en) * | 2005-12-22 | 2007-07-05 | Nippon Steel Engineering Co Ltd | Waste treatment method |
| JP2007175599A (en) * | 2005-12-27 | 2007-07-12 | Mitsubishi Materials Techno Corp | Method for recycling waste liquid |
| JP2011072852A (en) * | 2009-09-29 | 2011-04-14 | Dai Ichi High Frequency Co Ltd | Method for treating organic sludge |
| JP2011088089A (en) * | 2009-10-23 | 2011-05-06 | Toshiba Corp | Sludge treatment apparatus |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002078931A1 (en) * | 2001-03-29 | 2002-10-10 | Suzuki Kogyo Co. Ltd. | Apparatus for producing foamed moldings, and method for producing laminated foamed moldings and foamed moldings produced thereby |
| CN100400267C (en) * | 2001-03-29 | 2008-07-09 | 铃木工业株式会社 | Apparatus for producing foamed moldings, and methos for producing laminated foamed moldings and foamed molding produced thereby |
| JP2005152695A (en) * | 2003-11-20 | 2005-06-16 | Mitsubishi Materials Techno Corp | Method of drying treating object containing residue of food or organic matter generated from water treatment apparatus as component |
| JP2007167782A (en) * | 2005-12-22 | 2007-07-05 | Nippon Steel Engineering Co Ltd | Waste treatment method |
| JP2007175599A (en) * | 2005-12-27 | 2007-07-12 | Mitsubishi Materials Techno Corp | Method for recycling waste liquid |
| JP4607005B2 (en) * | 2005-12-27 | 2011-01-05 | 三菱マテリアルテクノ株式会社 | Waste liquid recycling method |
| JP2011072852A (en) * | 2009-09-29 | 2011-04-14 | Dai Ichi High Frequency Co Ltd | Method for treating organic sludge |
| JP2011088089A (en) * | 2009-10-23 | 2011-05-06 | Toshiba Corp | Sludge treatment apparatus |
| CN114440583A (en) * | 2022-02-24 | 2022-05-06 | 江苏三仪动物营养科技有限公司 | Waste heat recovery type drying and cooling device for livestock and poultry feed production and using method |
| CN114440583B (en) * | 2022-02-24 | 2022-12-27 | 江苏三仪动物营养科技有限公司 | Waste heat recovery type drying and cooling device for livestock and poultry feed production and using method |
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