JP4398270B2 - Method and apparatus for treating organic soil containing plant fiber - Google Patents

Method and apparatus for treating organic soil containing plant fiber Download PDF

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JP4398270B2
JP4398270B2 JP2004027005A JP2004027005A JP4398270B2 JP 4398270 B2 JP4398270 B2 JP 4398270B2 JP 2004027005 A JP2004027005 A JP 2004027005A JP 2004027005 A JP2004027005 A JP 2004027005A JP 4398270 B2 JP4398270 B2 JP 4398270B2
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slurry
plant fibers
organic soil
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air
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伸平 末松
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Nippon Steel Engineering Co Ltd
Nippon Steel Plant Designing Corp
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Nittetsu Plant Designing Corp
Nippon Steel Engineering Co Ltd
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Description

本発明は、港湾、湖沼、河川、池等から浚渫あるいは掘削された植物繊維を含む有機土の処理方法及び有機土処理装置に関するものである。   The present invention relates to an organic soil treatment method and an organic soil treatment apparatus containing plant fibers dredged or excavated from harbors, lakes, rivers, ponds and the like.

港湾、湖沼、河川、池等から浚渫あるいは掘削される汚泥を各種の事前処理の後、機械式脱水装置であるフィルタープレスにて脱水し固形化して用材化することが近年脚光を浴びてきており、浚渫汚泥の処理方法として、例えば特許文献１に開示されている。   In recent years, sludge that has been dredged or excavated from harbors, lakes, rivers, ponds, etc., has been attracting attention after various pretreatments and then dehydrated and solidified into materials by a filter press, which is a mechanical dehydrator. For example, Patent Document 1 discloses a method for treating soot sludge.

特許文献１に記載された浚渫汚泥の処理方法は、浚渫汚泥中の大型の木材や石などの挟雑物をバースクリーンあるいは振動グリズリーバーで分離し、分離後の汚泥を回転式トロンメルでスラリー化し、スラリー化した浚渫土を振動篩にかけ、石塊、礫と砂分を個別に分離脱水し、及び砂分を分離する細粒用振動篩あるいはスパイラル型分級機で砂分を分離し、更に細粒土を分離する高圧フィルタープレスで細粒土を分離して、浚渫汚泥を各成分毎の種々の土建用材料等への用材化が容易な形に分離処理するものである。
特開平８−２５７３１７号公報 The method for treating sludge described in Patent Document 1 is to separate large woods and stones in the sludge with a bar screen or a vibrating grizzly bar, and sludge the sludge after separation with a rotary trommel. Then, slurry slurry is put on a vibrating screen, stone blocks, gravel and sand are separated and dewatered separately, and sand is separated with a fine-grain vibrating sieve or spiral classifier to separate the sand, and further refined. A fine-grained soil is separated by a high-pressure filter press that separates the granular soil, and the sludge is separated and processed in a form that can be easily converted into various materials for construction materials.
JP-A-8-257317

特許文献１では、機械式脱水装置であるフィルタープレスを構成する機器として、処理対象物である浚渫汚泥等の原液を、フィルタープレス本体までに圧送用の種々のポンプが配置されているが、挟雑物を分離するバースクリーン、振動グリズリーバー、また、石塊、礫を分離する振動篩、さらに、砂分を分離する細粒用振動篩等を使用しても、土に植物の根、茎、葉等の植物繊維を含む、いわゆる有機土の場合、植物繊維を確実に除去することができないので、スラリー状の有機土をポンプによりフィルタープレスまで圧送しようとすると、ポンプに植物繊維が絡んでポンプが機能せず、また、機械式撹拌装置の撹拌羽根に植物繊維が絡み、機械的なトラブルや撹拌能力が低下するという問題が生じるため、有機土の分離処理には活用されなかった。   In Patent Document 1, various pumps for pumping raw liquid such as soot sludge, which is a processing object, are disposed as an apparatus constituting a filter press which is a mechanical dehydrator, up to the filter press body. Even if you use a bar screen to separate miscellaneous materials, a vibrating grizzly bar, a vibrating sieve to separate stone blocks or gravel, or a vibrating sieve for fine particles to separate sand, plant roots and stems In the case of so-called organic soil containing plant fibers such as leaves, plant fibers cannot be removed reliably, so when pumping the slurry-like organic soil to the filter press with a pump, the plant fibers get entangled with the pump The pump does not function, and plant fibers get entangled in the stirring blades of the mechanical stirrer, resulting in problems such as mechanical troubles and reduced stirring capacity. It was bought.

したがって、従来、植物繊維を含む有機土の処理方法としては、セメント、その他の固化剤等により固形化処理し、埋め立て場所に搬送・廃棄しているため、有効活用されなかった。   Therefore, conventionally, as a method for treating organic soil containing plant fibers, it has not been effectively utilized because it has been solidified with cement, other solidifying agents, etc., and transported and disposed of in a landfill.

そこで、本発明は、植物の根、茎、葉等の植物繊維を含む有機土をポンプで圧送可能に処理してフィルタープレスで固形処理可能とする植物繊維を含む有機土の処理方法及び有機土処理装置を提供するものである。   Therefore, the present invention relates to a method for treating organic soil containing organic fibers, including organic fibers containing plant fibers such as plant roots, stems, and leaves, which can be pumped by a pump and solid-processed by a filter press, and organic soil. A processing apparatus is provided.

本発明の植物繊維を含む有機土処理方法は、浚渫・掘削された植物繊維を含むスラリー状の有機土から大塊を除いた後、スラリー状の有機土を分離容器の中に貯留し、分離容器にて圧縮エアーによるエアーバブリングにより土粒子と植物繊維とを分離するとともに、植物繊維をスラリー上層部に浮遊させ、植物繊維が浮遊するスラリー上層部をオーバーフローさせて分離容器の外に排出し、植物繊維が除かれたスラリーを分離容器内からポンプにより取り出して脱水処理工程へ搬送することを特徴とする。   The method for treating organic soil containing plant fibers of the present invention removes large chunks from slurried organic soil containing dredged and excavated plant fibers, and then stores the slurried organic soil in a separation container and separates it. While separating soil particles and plant fibers by air bubbling with compressed air in the container, the plant fibers are suspended in the slurry upper layer, the slurry upper layer where the plant fibers are floating is overflowed and discharged out of the separation container, The slurry from which plant fibers have been removed is taken out from the separation container by a pump and conveyed to a dehydration process.

また、本発明の植物繊維を含む有機土処理装置は、容器上部にスラリー状の有機土から大塊を除去する篩を備え、容器内にエアーバブリング室と植物繊維分離室とが金網を介して配置され、エアーバブリング室は、底部に圧縮エアーを噴出してスラリー状の有機土をエアーバブリングするするバブリング配管を備え、植物繊維分離室は、エアーバブリング室でのエアーバブリングにより植物繊維が浮遊するスラリー上層部をオーバーフローさせるオーバーフロー口を備えるとともに、植物繊維が除かれたスラリーを分離容器内から取り出して脱水処理工程へ圧送するポンプを備えていることを特徴とする。   Moreover, the organic soil treatment apparatus containing the vegetable fiber of the present invention includes a sieve for removing large lumps from the slurry-like organic soil at the upper part of the container, and an air bubbling chamber and a vegetable fiber separation chamber are placed in the container via a wire mesh. The air bubbling chamber is provided with a bubbling pipe that blows compressed air to the bottom to air bubbling slurry-like organic soil, and the plant fiber separation chamber floats plant fibers by air bubbling in the air bubbling chamber. An overflow port for overflowing the upper layer portion of the slurry is provided, and a pump for taking out the slurry from which the plant fibers have been removed from the separation container and pumping it to the dehydration process step is provided.

本発明は、エアーバブリングにより有機土から植物繊維を分離することによってスラリーのポンプによる圧送ができ、また植物繊維に起因する撹拌羽根のトラブルもなくなるので、また有機土を固形化して処理することが可能となる。   In the present invention, the plant fiber is separated from the organic soil by air bubbling so that the slurry can be pumped by the pump, and the trouble of the stirring blade caused by the plant fiber is eliminated, so that the organic soil can be solidified and processed. It becomes possible.

以下、図面を参照して本発明を説明する。   The present invention will be described below with reference to the drawings.

図１は本発明の植物繊維分離装置の概略断面図、図２は図１の断面Ａ−Ａの平面図である。   FIG. 1 is a schematic cross-sectional view of the plant fiber separation device of the present invention, and FIG. 2 is a plan view of a cross-section AA of FIG.

植物繊維分離装置の分離容器１は、エアーバブリング室１ａと植物繊維分離室１ｂが金網２を介して配置されている。分離容器１の上方に大塊を除去する振動バースクリーン３が配置されている。   In the separation container 1 of the vegetable fiber separation device, an air bubbling chamber 1 a and a vegetable fiber separation chamber 1 b are arranged via a wire mesh 2. A vibrating bar screen 3 is disposed above the separation container 1 to remove large lumps.

エアーバブリング室１ａの底部には、エアーバブリング配管４が配置されている。エアーバブリング配管４、分離容器外のコンプレサー（図示せず）に接続されたエアー基管４ａにエアーバブリング室１ａに設けられたヘッダー管４ｂが接続され、ヘッダー管４ｂには、複数のエアー支管４ｃが設けられている。各エアー支管４ｃの上面には、それぞれエアーバブリング用のエアー噴出孔４ｄが開口されている。   An air bubbling pipe 4 is disposed at the bottom of the air bubbling chamber 1a. A header pipe 4b provided in the air bubbling chamber 1a is connected to an air bubbling pipe 4 and an air base pipe 4a connected to a compressor (not shown) outside the separation container. A plurality of air branch pipes 4c are connected to the header pipe 4b. Is provided. 4 b of air ejection holes for air bubbling are opened in the upper surface of each air branch pipe 4c.

エアー噴出孔４ｄの配設ピッチＰ１、Ｐ２は、平面的に見て、各々５０ｃｍ以下になるように配設することが好ましく、５０ｃｍを超えるピッチになるとエアーバブリングの効果が極端に減少する。また、エアー噴出孔４ｄの孔径は、１０ｍｍ以上２０ｍｍ以下が好ましい。１０ｍｍ未満になるとエアー噴出時の圧力損失が大きくなり、エネルギーロスが多大となる。また、２０ｍｍを超えると噴出速度が小さくなるため撹拌効果が減少する。さらに、噴出孔４ｄから噴出するエアーの噴出速度については、１００〜２００ｍ／秒が好ましい。１００ｍ／秒未満では撹拌の効果が小さく、逆に２００ｍ／秒を超えるとエネルギーロスとなると共に、安定・持続した圧縮エアーの供給のための設備が多大となる。   The arrangement pitches P1 and P2 of the air ejection holes 4d are preferably arranged to be 50 cm or less in a plan view, and when the pitch exceeds 50 cm, the effect of air bubbling is extremely reduced. The hole diameter of the air ejection hole 4d is preferably 10 mm or more and 20 mm or less. If it is less than 10 mm, the pressure loss at the time of air ejection becomes large and the energy loss becomes great. On the other hand, if it exceeds 20 mm, the jetting speed becomes small and the stirring effect is reduced. Furthermore, about the ejection speed of the air ejected from the ejection hole 4d, 100 to 200 m / sec is preferable. If the speed is less than 100 m / sec, the effect of stirring is small. Conversely, if the speed exceeds 200 m / sec, energy loss occurs, and equipment for supplying stable and sustained compressed air increases.

なお、エアーバブリング配管４を設ける代わりに、平板に複数のエアー噴出孔を設けた、いわゆるパンチングプレートを配設してもよい。この場合、エアー噴出孔の配設ピッチ、孔径などは、エアーバブリング配管４と同様にするとよい。   Instead of providing the air bubbling pipe 4, a so-called punching plate in which a plurality of air ejection holes are provided on a flat plate may be provided. In this case, the arrangement pitch of the air ejection holes, the hole diameter, and the like may be the same as those of the air bubbling pipe 4.

エアーバブリング室１ａと植物繊維分離室１ｂは金網２で仕切られ、エアーバブリング室１ａのエアーバブリングにより土粒子ｍと分離された植物繊維ｆが浮上する途中でスラリー中を移動して植物繊維分離室１ｂに移動しないようにしている。金網２の高さはスラリーｓの上層部に浮遊する植物繊維ｆが植物繊維分離室１ｂに移動できる高さにする。植物繊維分離室１ｂは植物繊維ｆが浮遊するスラリーの上層部がオーバーフローするようにオーバーフロー口５が形成されている。オーバーフロー口５からオーバーフローしたスラリーは循環ポンプ６で振動バースクリーン３を介してエアーバブリング室１ａへ戻される。オーバーフローし、植物繊維を除去したスラリーを分離容器内に戻すことにより、土粒子が本来の脱水処理工程に送られることとなり脱水処理される。また、スラリーを分離容器からオーバーフローさせるために、オーバーフローしたスラリーを分離容器１に戻すとともに、後処理工程のスラリーを戻して加水する。   The air bubbling chamber 1a and the plant fiber separation chamber 1b are partitioned by a wire mesh 2, and the plant fiber separation chamber moves by moving through the slurry while the plant fibers f separated from the soil particles m by air bubbling in the air bubbling chamber 1a rise. It does not move to 1b. The height of the wire mesh 2 is set such that the plant fibers f floating in the upper layer of the slurry s can move to the plant fiber separation chamber 1b. In the plant fiber separation chamber 1b, an overflow port 5 is formed so that the upper layer portion of the slurry in which the plant fiber f floats overflows. Slurry overflowed from the overflow port 5 is returned to the air bubbling chamber 1a through the vibrating bar screen 3 by the circulation pump 6. By returning the slurry, which has overflowed and from which the plant fibers have been removed, to the inside of the separation container, the soil particles are sent to the original dehydration process and dehydrated. In addition, in order to overflow the slurry from the separation container, the overflowed slurry is returned to the separation container 1, and the slurry in the post-treatment step is returned and hydrated.

植物繊維分離室１ｂの底には、植物繊維ｆが分離されたスラリーを取り出すポンプ７が配置されている。   At the bottom of the plant fiber separation chamber 1b, a pump 7 for taking out the slurry from which the plant fiber f has been separated is disposed.

上記構成からなる本発明の植物繊維分離装置の動作について説明する。   Operation | movement of the vegetable fiber separation apparatus of this invention which consists of the said structure is demonstrated.

港湾、湖沼、河川、池等から浚渫あるいは掘削されたスラリー状の有機土は、例えばショベルカー８（図３参照）で搬送されて分離容器１の上方に配置された振動バースクリーン３の上に投入されて大塊が除かれて植物繊維分離装置の外に搬出され、篩い下のスラリー状の有機土は分離容器１に溜められる。   Slurry organic soil dredged or excavated from harbors, lakes, rivers, ponds, etc. is transported by, for example, a shovel car 8 (see FIG. 3) and placed on the vibrating bar screen 3 disposed above the separation container 1. The mass is removed and the mass is removed and carried out of the plant fiber separation device, and the slurry-like organic soil under the sieve is stored in the separation container 1.

エアーバブリング室１ａでは、コンプレサーから圧縮エアーがエアー基管４ａ、ヘッダー管４ｂを通ってエアー支管４ｃに供給され、エアー支管４ｃのエアー噴出孔４ｄから圧縮エアーがスラリー状の有機土中に噴出し、エアーバブリングによりスラリー状の有機土を撹拌して土粒子ｍと植物繊維ｆを分離する。植物繊維ｆはスラリーより比重が小さいのでバブリングにより上昇してスラリー表面に向かって浮上する。   In the air bubbling chamber 1a, compressed air is supplied from the compressor to the air branch pipe 4c through the air base pipe 4a and the header pipe 4b, and the compressed air is jetted into the slurry-like organic soil from the air ejection holes 4d of the air branch pipe 4c. The slurry-like organic soil is stirred by air bubbling to separate the soil particles m and the plant fibers f. Since the plant fiber f has a specific gravity smaller than that of the slurry, it rises by bubbling and floats toward the surface of the slurry.

分離容器１は、スラリーが植物繊維分離室１ｂのオーバーフロー口５からオーバーフローして移動するように、加水されるとともに、オーバーフローしたスラリーを循環ポンプ６（図３参照）で振動バースクリーン３を介してエアーバブリング室１ａへ循環させているので、植物繊維ｆが浮遊しているスラリーｓは植物繊維分離室１ｂへ移動し植物繊維分離室１ｂからスラリーと共にオーバーフローして分離容器外に排出され、植物繊維が除去されたスラリーが植物繊維分離室１ｂ内に溜まる。植物繊維の分離が完了すると、ポンプ７で植物繊維が除去されたスラリーを取り出す。   The separation container 1 is watered so that the slurry overflows from the overflow port 5 of the vegetable fiber separation chamber 1b and moves, and the overflowed slurry is passed through the vibrating bar screen 3 by the circulation pump 6 (see FIG. 3). Since it is circulated to the air bubbling chamber 1a, the slurry s in which the plant fiber f is suspended moves to the plant fiber separation chamber 1b, overflows together with the slurry from the plant fiber separation chamber 1b, and is discharged out of the separation container. The slurry from which water has been removed accumulates in the vegetable fiber separation chamber 1b. When the separation of the plant fibers is completed, the slurry from which the plant fibers have been removed is taken out by the pump 7.

エアーバブリング後のオーバーフローしたスラリーは、土粒子を含んだ低濃度スラリーであるため、このまま川、海などに放流できないが、本発明では、分離容器内で土粒子と植物繊維からなるスラリー状の有機土を圧縮エアーのバブリングによる撹拌力と、スラリーと植物繊維の比重差により土粒子と植物繊維が分離され、植物繊維が浮上しオーバーフローするスラリーとともに分離容器から除去されるので、ポンプによりスラリーの圧送が可能となり、植物繊維に起因する、スラリー槽の撹拌羽根のトラブルも防止することができるため、有機土の固化処理が可能となる。   Since the overflowed slurry after air bubbling is a low-concentration slurry containing soil particles, it cannot be discharged into the river or the sea as it is. However, in the present invention, the slurry-like organic material consisting of soil particles and plant fibers is used in the separation container. The soil particles and plant fibers are separated by the stirring force by bubbling of compressed air and the specific gravity difference between the slurry and plant fibers, and the plant fibers are lifted and removed from the separation container together with the overflowing slurry. It is possible to prevent the trouble of the stirring blades in the slurry tank due to the plant fibers, and thus the solidification treatment of the organic soil becomes possible.

図３は本発明の植物繊維分離装置を適用した有機土の固化処理の一例を示すフロー図である。ショベルカー８で搬送されたスラリー状の有機土は振動バースクリーン３で大塊を除去して、篩い下のスラリー状の有機土は分離容器１に溜まる。分離容器１のエアーバブリング室１ａで圧縮エアーをエアーバブリング配管４のエアー噴出口から噴出させてエアーバブリングにより土粒子と植物繊維を分離し、植物繊維分離室１ｂから植物繊維が浮遊しているスラリー上層部はオーバーフローして振動篩９に落下してスラリーと植物繊維が分離され、植物繊維はベルトコンベア１０で排出され、植物繊維が除去されたスラリーはスラリー槽１１から循環ポンプ６で分離容器１に戻される。   FIG. 3 is a flowchart showing an example of organic soil solidification processing to which the plant fiber separation device of the present invention is applied. The slurry-like organic soil conveyed by the shovel car 8 is removed by the vibrating bar screen 3, and the slurry-like organic soil under the sieve is collected in the separation container 1. In the air bubbling chamber 1a of the separation container 1, compressed air is ejected from the air outlet of the air bubbling pipe 4 to separate soil particles and plant fibers by air bubbling, and the slurry in which the plant fibers are floating from the plant fiber separation chamber 1b The upper layer overflows and falls onto the vibrating sieve 9 to separate the slurry and the plant fiber, the plant fiber is discharged by the belt conveyor 10, and the slurry from which the plant fiber has been removed is separated from the slurry tank 11 by the circulation pump 6 by the separation container 1. Returned to

植物繊維の分離が完了すると、ポンプ７で植物繊維が除去されたスラリーを取り出し、振動篩１２に送り砂利、砂を分離する。篩い下のスラリーはスラリー槽１３からポンプ１４で液体サイクロン１５へ戻され、液体サイクロン１５でオーバーフローした微細粒子を含むスラリーは貯泥槽１６に貯留する。貯泥槽１６では微細粒子が分散するように、モータで攪拌羽根１７を回転させて、微細粒子を分散させる。   When the separation of the plant fibers is completed, the slurry from which the plant fibers have been removed is taken out by the pump 7 and sent to the vibrating screen 12 to separate the gravel and sand. The slurry under the sieve is returned from the slurry tank 13 to the liquid cyclone 15 by the pump 14, and the slurry containing fine particles overflowed by the liquid cyclone 15 is stored in the mud storage tank 16. In the mud storage tank 16, the stirring blades 17 are rotated by a motor so that the fine particles are dispersed, and the fine particles are dispersed.

貯泥槽１６のスラリーはポンプ１８により造粒槽１９へ送られ、添加剤を添加して攪拌羽根２０で撹拌しながらスラリー中の微細粒子を造粒する。添加剤としては、ＰＡＣ、消石灰などを使用し、造粒により後工程でのフィルタープレスの脱水効果を促進させる。   The slurry in the mud storage tank 16 is sent to a granulation tank 19 by a pump 18, and an additive is added to granulate fine particles in the slurry while stirring with the stirring blade 20. As an additive, PAC, slaked lime or the like is used, and the dehydration effect of the filter press in the subsequent process is promoted by granulation.

造粒槽１９のスラリーをポンプ２１によりフィルタープレス２２に送って脱水処理する。フィルタープレス２２で固化された脱水ケーキ２３はコンベア２４で搬送し、その後埋立処分する。フィルタープレス２２から排出されるろ液は、ろ液槽２５に貯留し、ポンプ２６で分離容器１へ送って加水してスラリーをオーバーフローさせる。   The slurry in the granulation tank 19 is sent to the filter press 22 by the pump 21 and dehydrated. The dewatered cake 23 solidified by the filter press 22 is conveyed by a conveyor 24 and then disposed of in landfill. The filtrate discharged from the filter press 22 is stored in the filtrate tank 25, and is sent to the separation container 1 by the pump 26 and is added thereto to overflow the slurry.

ろ液の一部は中和処理装置２７に送り、例えば造粒槽１９で消石灰を添加した場合にはＣＯ２ガスの吹込により中和処理する。 A part of the filtrate is sent to the neutralization processing device 27. For example, when slaked lime is added in the granulation tank 19, the neutralization is performed by blowing CO 2 gas.

中和処理後、濁水処理装置２８へ送ってＰＡＣ、高分子凝集剤を添加して微細粒子を凝集処理して沈降させ、上澄み液を放流する。   After the neutralization treatment, the turbid water treatment device 28 is sent to which PAC and a polymer flocculant are added to agglomerate and settle the fine particles, and the supernatant liquid is discharged.

以上の工程において、有機土中から植物繊維を分離してポンプにより圧送可能となり、有機土の固化処理が可能となる。   In the above process, the plant fiber can be separated from the organic soil and pumped by a pump, and the organic soil can be solidified.

本発明の植物繊維分離装置の概略断面図である。It is a schematic sectional drawing of the vegetable fiber separation apparatus of this invention. 図１の断面Ａ−Ａの平面図である。It is a top view of the cross section AA of FIG. 本発明の植物繊維分離装置を適用した場合の有機土の固化処理の全体処理フローの一例である。It is an example of the whole processing flow of the solidification process of organic soil at the time of applying the vegetable fiber separation apparatus of this invention.

符号の説明Explanation of symbols

１：分離容器
１ａ：エアーバブリング室
１ｂ：植物繊維分離室
２：金網
３：振動バースクリーン
４：エアーバブリング配管
４ａ：エアー基管
４ｂ：ヘッダー管
４ｃ：エアー支管
４ｄ：エアー噴出孔
５：オーバーフロー口
６：循環ポンプ
７：ポンプ
８：ショベルカー
９：振動篩
１０：ベルトコンベア
１１：スラリー槽
１２：振動篩
１３：スラリー槽
１４：ポンプ
１５：液体サイクロン
１６： 貯泥槽
１７：撹拌羽根
１８：ポンプ
１９：造粒槽
２０：回転羽根
２１：ポンプ
２２：フィルタープレス
２３：脱水ケーキ
２４：コンベア
２５：ろ液槽
２６：ポンプ 1: Separation container 1a: Air bubbling chamber 1b: Plant fiber separation chamber 2: Wire mesh 3: Vibrating bar screen 4: Air bubbling piping 4a: Air base tube 4b: Header tube 4c: Air branch tube 4d: Air ejection hole 5: Overflow port 6: Circulating pump 7: Pump 8: Excavator 9: Vibrating sieve 10: Belt conveyor 11: Slurry tank 12: Vibrating sieve 13: Slurry tank 14: Pump 15: Hydrocyclone 16: Mud storage tank 17: Agitation blade 18: Pump 19: Granulation tank 20: Rotary blade 21: Pump 22: Filter press 23: Dehydrated cake 24: Conveyor 25: Filtrate tank 26: Pump

Claims (6)

浚渫・掘削された植物繊維を含むスラリー状の有機土から大塊を除いた後、
スラリー状の有機土を分離容器の中に貯留し、分離容器にて圧縮エアーによるエアーバブリングにより土粒子と植物繊維とを分離するとともに、植物繊維をスラリー上層部に浮遊させ、
植物繊維が浮遊するスラリー上層部をオーバーフローさせて分離容器の外に排出し、
植物繊維が除かれたスラリーを分離容器内からポンプにより取り出して脱水処理工程へ搬送することを特徴とする植物繊維を含む有機土の処理方法。 After removing large masses from slurry-like organic soil containing dredged and excavated plant fibers,
The slurry-like organic soil is stored in a separation container, and soil particles and plant fibers are separated by air bubbling with compressed air in the separation container, and the plant fibers are suspended in the slurry upper layer,
Overflow the slurry upper layer where the plant fiber floats and discharge it out of the separation container,
A method for treating organic soil containing plant fibers, wherein the slurry from which plant fibers have been removed is taken out from a separation container by a pump and conveyed to a dehydration step. 分離容器の外に排出した植物繊維とオーバーフローしたスラリーとを分離させ、分離したスラリーを分離容器に戻すことを特徴とする請求項１記載の植物繊維を含む有機土の処理方法。   2. The method for treating organic soil containing plant fibers according to claim 1, wherein the plant fibers discharged out of the separation container are separated from the overflowed slurry, and the separated slurry is returned to the separation container. 脱水処理工程がフィルタープレスによる脱水工程であることを特徴とする請求項１又は２記載の植物繊維を含む有機土の処理方法。   3. The method for treating organic soil containing plant fibers according to claim 1, wherein the dehydration step is a dehydration step using a filter press. 容器上部にスラリー状の有機土から大塊を除去する篩を備え、
容器内にエアーバブリング室と植物繊維分離室とが金網を介して配置され、
エアーバブリング室は、底部に圧縮エアーを噴出してスラリー状の有機土をエアーバブリングするするバブリング配管を備え、
植物繊維分離室は、エアーバブリング室でのエアーバブリングにより植物繊維が浮遊するスラリー上層部をオーバーフローさせるオーバーフロー口を備えるとともに、植物繊維が除かれたスラリーを分離容器内から取り出して脱水処理工程へ圧送するポンプを備えていることを特徴とする植物繊維を含む有機土処理装置。 Equipped with a sieve at the top of the container to remove large lumps from slurry-like organic soil,
An air bubbling chamber and a plant fiber separation chamber are arranged in the container via a wire mesh,
The air bubbling chamber is equipped with a bubbling pipe for air bubbling slurry-like organic soil by jetting compressed air to the bottom,
The plant fiber separation chamber has an overflow port for overflowing the slurry upper layer where the plant fibers float by air bubbling in the air bubbling chamber, and takes out the slurry from which the plant fibers have been removed from the separation container and pumps it to the dehydration process. An organic soil treatment apparatus containing plant fibers, characterized by comprising a pump that performs the process. オーバーフローしたスラリーを容器へ戻す循環系を有することを特徴とする請求項４記載の植物繊維を含む有機土処理装置。   5. The organic soil treatment apparatus containing plant fibers according to claim 4, further comprising a circulation system for returning the overflowed slurry to the container. 脱水処理工程がフィルタープレスであることを特徴とする請求項４又は５記載の植物繊維を含む有機土処理装置。   6. The organic soil treatment apparatus containing plant fibers according to claim 4, wherein the dehydration treatment step is a filter press.
JP2004027005A 2004-02-03 2004-02-03 Method and apparatus for treating organic soil containing plant fiber Expired - Fee Related JP4398270B2 (en)

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