JPH07115034B2 - Disposal method of construction mud and mud - Google Patents
Disposal method of construction mud and mudInfo
- Publication number
- JPH07115034B2 JPH07115034B2 JP27152789A JP27152789A JPH07115034B2 JP H07115034 B2 JPH07115034 B2 JP H07115034B2 JP 27152789 A JP27152789 A JP 27152789A JP 27152789 A JP27152789 A JP 27152789A JP H07115034 B2 JPH07115034 B2 JP H07115034B2
- Authority
- JP
- Japan
- Prior art keywords
- mud
- water
- water content
- construction
- self
- 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.)
- Expired - Fee Related
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Treatment Of Sludge (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、一般に建設発生土と呼ばれる可燃性物質を全
く含まない無機質の泥水・泥土及び残土の廃棄処理方法
に関する。更に詳述すると、本発明は主に地下下水道や
地下鉄のシールド掘削工事等によって発生する建設泥水
・泥土類を有効利用できるように処理する方法に関す
る。TECHNICAL FIELD The present invention relates to a method for disposing of inorganic muddy water / mud and residual soil, which is generally referred to as construction soil, and does not contain any combustible substances. More specifically, the present invention mainly relates to a method of effectively treating construction mud / mud generated by underground sewer or shield excavation work of a subway.
（従来の技術） 建設工事等に伴って発生する泥水・泥土類は産業廃棄物
として適正に処理しなければならない。例えば、地下鉄
のシールド掘削工事において発生する泥水・泥土は50〜
60％以上の水分を含んでいることから、脱水・固化処理
を施して廃棄処分しなければならない。(Prior art) Muddy water and mud generated by construction work must be properly treated as industrial waste. For example, the amount of muddy water and mud generated in shield excavation works for subways is 50-
Since it contains more than 60% of water, it must be dehydrated and solidified and disposed of.
そこで、従来は、フィルタープレス等を利用した機械的
脱水処理と凝固剤を使用した固化処理を併用することに
よって、ある程度の強さ（例えば圧縮強度0.5kg/cm2、
含水率20〜30％）を有する粒状物に安定固化させてから
埋立て地に埋め立てている。Therefore, conventionally, by using a mechanical dehydration treatment using a filter press or the like and a solidification treatment using a coagulant together, a certain level of strength (for example, compression strength 0.5 kg / cm 2 ,
The water content is 20 to 30%) and the solid is stabilized and solidified before landfilling.
例えば、建設汚泥の場合、泥水・泥土を分級機にかけて
砂利等の固形分と原水（泥水・泥土）を分離した後、沈
澱槽において原水と凝集剤を混合攪拌させて固形分を沈
降させ、上澄水を分離して中和・調整後放流する一方、
沈降した濃縮泥水を粒造槽において高分子凝集剤の添加
によって球状の固り（ペレット）に造粒し、更に脱水機
において薬品による凝集作用と回転力により固形分を更
に大きな固りに造粒してから、あるいは脱水ケーキのま
ま、海洋に投棄したり、埋立て地に埋立てている。For example, in the case of construction sludge, muddy water and mud are separated by a classifier to separate solid content such as gravel and raw water (muddy water and mud), and then the raw water and flocculant are mixed and stirred in the settling tank to precipitate the solid content. While clear water is separated, neutralized and adjusted, and then discharged,
The concentrated concentrated mud water that has settled is granulated into a spherical solid (pellet) by adding a polymer flocculant in a granulation tank, and the solid content is further granulated into a larger solid by the aggregating action and rotation force of chemicals in a dehydrator. After that, or as the dehydrated cake remains, it is dumped in the ocean or landfilled.
（発明が解決しようとする課題） しかしながら、ただ廃棄するために多大のコストをかけ
て安定固化させることは無駄である。しかも、近年、地
下構造物が急速に増大しているため、泥水・泥土の発生
が埋立てや投棄だけではまかないきれない程に増大する
ことが予想されることから、新たな廃棄処理が望まれ
る。(Problems to be Solved by the Invention) However, it is wasteful to make a stable solidification at a great cost just for discarding. Moreover, since underground structures are increasing rapidly in recent years, it is expected that the generation of muddy water and mud will increase beyond landfill and dumping, so new disposal is desired. .
本発明は、従来廃棄処理に手間がかかっていた泥水・泥
土類の安価でかつ有効な廃棄処理方法を提供することを
目的とする。An object of the present invention is to provide an inexpensive and effective disposal method for muddy water and mud, which has conventionally been troublesome in disposal.
（課題を解決するための手段） かかる目的を達成するため、本発明の建設発生泥水・泥
土類の廃棄処理方法は、トンネル工事や基礎杭工事など
の建設産業から発生する含水率50％以上の可燃性物質を
全く含まない無機質の泥水・泥土類を攪拌手段を有する
沈殿槽に投入して沈殿させ、上澄水を除いた後の沈降し
た泥水・泥土類に自燃用燃料を沈殿槽において混入して
攪拌し、均質に混練した後、この濃縮泥水を抽出して機
械脱水し造粒作業に適した水分に調整し、その後造粒す
ると共に後の焼成工程に耐えるペレット強度を得る水分
に調整した後、含有する自燃用燃料を燃焼させて焼成
し、無機質系の構造用の人工軽量骨材を製造するように
している。(Means for Solving the Problems) In order to achieve such an object, the method of disposing of mud and mud generated in the construction of the present invention is applied to a construction industry such as tunnel construction or foundation pile construction with a water content of 50% or more. Inorganic muddy water / mud that does not contain any combustible substances is put into a settling tank equipped with a stirring means to cause precipitation, and after removing the supernatant water, the self-burning fuel is mixed in the settling mud / mud in the settling tank. After stirring and homogeneously kneading, this concentrated mud water was extracted and mechanically dehydrated to adjust the water content suitable for granulation work, and then granulated and adjusted to a water content that gives pellet strength that will withstand the subsequent firing step. After that, the self-combusting fuel contained therein is burned and fired to produce an inorganic structural artificial lightweight aggregate.
また、本発明の泥水・泥土類の廃棄処理方法は、建設残
土等の泥水・泥土に較べて比較的低含水率の土類を粉砕
し、かつ水分を加えて一旦含水率50％以上の泥土にし、
それを攪拌手段を有する沈殿槽に投入して沈殿させ、上
澄水を除いた後の沈降した泥水・泥土類に自燃用燃料を
沈殿槽において混入して攪拌し、均質に混練した後、こ
の濃縮泥水を抽出して機械脱水し、更に造粒作業に適し
た水分に調整し、その後造粒すると共に後の焼成工程に
耐えるペレット強度を得る水分に調整した後、含有する
自燃用燃料を燃焼させて焼成し、無機質系の構造用の人
工軽量骨材を製造するようにしている。In addition, the method of disposing muddy water / mud of the present invention is a method of crushing soil having a relatively low water content as compared with muddy water / mud such as construction residual soil, and adding water to a mud once having a water content of 50% or more. West,
It is put into a settling tank equipped with a stirring means for precipitation, and the self-combustion fuel is mixed in the settling mud / mud after removing the supernatant water in the settling tank, stirred and homogenized. Muddy water is extracted, mechanically dehydrated, adjusted to a water content suitable for granulation work, and then granulated and adjusted to a water content that provides pellet strength that can withstand the subsequent firing step, and then burns the self-burning fuel contained. It is then fired to produce an artificial lightweight aggregate for an inorganic structure.
（作用） したがって、自燃用燃料は水分を多量に含む泥水・泥土
類の中に攪拌されることによって均質に混入される。そ
して、均質に混練された状態で造粒作業に適した水分に
まで脱水処理される。そして、造粒のための水分を全く
加えることなく、そのままの水分で造粒してから乾燥さ
せて固める。その後、均質に含有する自燃用燃料を燃焼
させて建設発生土を焼成させる。乾燥した泥水・泥土類
の固りに均質に混在する自燃用燃料の燃焼熱によって、
固形物内の無機質成分が焼結し、粒状物同士の融着や目
詰りを起こすことなく無機質系の構造用人工軽量骨材が
焼成される。(Operation) Therefore, the self-burning fuel is homogeneously mixed by being stirred into muddy water / mud containing a large amount of water. Then, in a state where the mixture is homogeneously kneaded, dehydration is performed until the water content is suitable for granulation work. Then, without adding any water for granulation, the water is granulated with the water as it is, and then dried and solidified. After that, the self-burning fuel contained uniformly is burned to burn the soil generated from the construction. Due to the combustion heat of the self-combustion fuel that is homogeneously mixed in the solid of dry mud and mud,
The inorganic component in the solid matter is sintered, and the inorganic artificial lightweight aggregate for structure is fired without causing fusion between the particulate matters and clogging.
（実施例） 以下、本発明の構成を図面に示す実施例に基づいて詳細
に説明する。(Example) Hereinafter, the structure of the present invention will be described in detail based on an example shown in the drawings.
第１図に本発明の泥水・泥土類の廃棄処理方法を実施す
る廃棄処理システムの一実施例を示す。この廃棄処理シ
ステムは、泥水泥土類を均質化して自燃用燃料を混入す
る混練設備１と、建設残土のような比較的水分の低い土
類を処理に適合させるための設備10と、その混練原料を
所定の水分の固形物に成形する設備20と、それを別途燃
料を用いずに焼成する設備30と、焼成品を大きさ別に選
別して貯留する設備40とから成る。FIG. 1 shows an embodiment of a waste disposal system for carrying out the waste water / mud waste disposal method of the present invention. This waste treatment system comprises a kneading facility 1 for homogenizing mud and mud and mixing fuel for self-combustion, a facility 10 for adapting relatively low-moisture soil such as construction residual soil to treatment, and a kneading raw material therefor. It is composed of a facility 20 for forming a solid substance having a predetermined water content, a facility 30 for burning the solid substance without using a fuel, and a facility 40 for sorting and storing the burned products by size.
混練設備１は泥水受入れホッパ２と、貯留された泥水７
を圧送する高圧ポンプ３と、泥水７の中から挟雑物や砂
利等の固形物をふるい分ける筒状ふるい（トロンメル）
４と、攪拌翼５を有するバッチ式の複数の沈泥槽６から
主に成る。The kneading facility 1 has a muddy water receiving hopper 2 and stored muddy water 7
High-pressure pump 3 for pressure-feeding, and a cylindrical sieve (Trommel) for sieving solid matters such as foreign matters and gravel from the muddy water 7.
4 and a plurality of batch type silt tanks 6 having a stirring blade 5.
建設残土を処理する設備10は、グリズリー11と、磁力選
別機12と、残土置場13と、水分を補給しつつ建設残土を
粉砕して一定含水率のスラリーとする湿式粉砕ミル14及
び湿式ミルによって粉砕された建設残土のスラリーを筒
型ふるい４に圧送する高圧ポンプ15とから成る。The equipment 10 for treating the construction residual soil includes a grizzly 11, a magnetic separator 12, a residual soil storage 13, and a wet grinding mill 14 and a wet mill that grind the construction residual soil while supplying water to obtain a slurry having a constant water content. And a high-pressure pump 15 for pumping the crushed slurry of construction residual soil to the cylindrical sieve 4.
成形設備20は、機械的脱水処理を施すフィルタープレス
21と、このフィルタープレス21に沈泥槽６に溜った濃縮
泥水９を送る高圧ポンプ22と、ケーキ受け23と、水分調
整のために添加する無機質微粒子を貯留するサイロ24
と、ケーキ29と無機質微粒子を混合するニーダー25と、
ニーダー25で混練されたケーキを所定の大きさの粒に成
形する押出し成形機・カッター26と、成形粒を乾燥させ
るバンドドライヤー27と、ふるい28から成る。バンドド
ライヤ等の乾燥装置27は後工程の焼成用キルン30の排ガ
スの熱を利用することが好ましい。例えば、焼成用キル
ン30の排ガスをバンドドライヤ27に直接導入したり、バ
グフィルター31とサイクロン32を経て清浄にしたキルン
排ガスを導入するようにしている。The molding equipment 20 is a filter press for mechanical dewatering.
21, a high-pressure pump 22 for feeding the concentrated mud water 9 accumulated in the silt tank 6 to the filter press 21, a cake receiver 23, and a silo 24 for storing inorganic fine particles to be added for water content adjustment.
And a kneader 25 that mixes the cake 29 and the inorganic fine particles,
It is composed of an extruder / cutter 26 for molding the cake kneaded by the kneader 25 into particles of a predetermined size, a band dryer 27 for drying the molded particles, and a sieve 28. It is preferable that the drying device 27 such as a band dryer uses the heat of the exhaust gas of the firing kiln 30 in the post process. For example, the exhaust gas from the firing kiln 30 is directly introduced into the band dryer 27, or the cleaned kiln exhaust gas is introduced via the bag filter 31 and the cyclone 32.
焼成設備30としては、例えば、泥水・泥土類の粒子を積
層し、下層に着火して自然通風によって下から上へ焼成
を進める立型キルンや、エンドレスのベルト上にグリー
ンペレットを載置して、強制通風によって焼成するシン
ターバンド等の使用が好ましい。この焼成は1100〜1200
℃で行なわれる。Examples of the firing equipment 30 include, for example, stacking particles of muddy water / mud earth, igniting the lower layer and promoting firing from the bottom to the top by natural ventilation, or placing green pellets on an endless belt. It is preferable to use a sinter band or the like that is fired by forced ventilation. This firing is 1100-1200
Performed at ° C.
貯留設備40としては、振動ふるい41と区画された製品置
場42から成る。The storage facility 40 includes a vibrating sieve 41 and a partitioned product storage 42.
ここで、処理対象となる泥水・泥土類としては、 地下下水道・地下鉄等シールド掘削工事、地下連
壁、アースオーガ杭工事等によって発生する泥水・泥
土、上水道無機質汚泥等のその他の汚泥、 都市建設工事によって発生する根伐土等の建設残
土、 ダム堆積土、河川及び湖沼浚渫泥土等の浚渫土、 選炭ボタ、選炭スラッジ、COM残滓等の石炭廃棄
物、 選鉱テーリング、精錬スラグ廃棄物等の鉱業・精錬
廃棄物、 過助剤廃棄物、 等が挙げられる。The muddy water and mud to be treated here include muddy water and mud generated by underground sewer / subway shield excavation work, underground wall, earth auger pile construction, and other sludge such as waterworks inorganic sludge, urban construction. Mining industry such as construction residual soil such as decontaminated soil generated by construction, dam sedimented soil, dredged soil such as river and lake dredged mud, coal waste such as coal preparation botter, coal preparation sludge, COM residue, beneficiation tailing, smelting slag waste・ Refining waste, super-auxiliary agent waste, etc.
また、この泥水泥土類を原料として人工骨材を製造する
場合には、副原料として、 水分調整材としての石炭灰（フライアッシュ、炉床
アッシュ、流動床炉床灰）や下水道汚泥焼却灰等の焼却
灰、都市ごみ焼却灰、 燃料兼造骨材料としての下水道汚泥等の汚泥、の使
用が好ましい。When manufacturing artificial aggregate using this mud and mud as a raw material, coal ash (fly ash, hearth ash, fluidized bed hearth ash) as a water content adjusting material, sewer sludge incineration ash, etc. are used as auxiliary materials. It is preferable to use incineration ash of, incineration ash of municipal waste, and sludge such as sewer sludge as a fuel and bone forming material.
この廃棄処理システムによると、泥水・泥土類は次のよ
うにして処理される。According to this waste treatment system, muddy water and mud are treated as follows.
まず、泥水・泥土７は、泥水受入ホッパー２に貯留され
る。そして、高圧ポンプ３によって筒状ふるい（トロン
メル）４に送泥され、水洗しつつ所定の粒径以上の固形
物を取除き、所定粒径以下のものを複数のバッチ式沈澱
槽６で受ける。このとき、泥水・泥土は約80％以上の含
水率である。沈澱槽６では、固形分９が沈降し、水分
（上澄水）８と分離される。上澄水８は、沈泥槽６の上
方から抜きとられ、一旦貯水槽５に貯められる。First, the muddy water / soil 7 is stored in the muddy water receiving hopper 2. Then, it is sent to a cylindrical sieve (Trommel) 4 by a high-pressure pump 3, and while being washed with water, solid matters having a predetermined particle size or more are removed, and those having a particle size of the predetermined particle size or less are received by a plurality of batch type precipitation tanks 6. At this time, the water content of mud and mud is about 80% or more. In the settling tank 6, the solid content 9 settles and is separated from the water content (supernatant water) 8. The supernatant water 8 is extracted from above the silt tank 6 and temporarily stored in the water tank 5.
水抜き後、濃縮泥水・泥土９に自燃用燃料を適量混入
し、攪拌する。ここで、自燃用燃料としては、微粉炭、
コークス粉末、オイルコークス粉末、もみがら、おがく
ず、ジュートくず、バカス、泥炭、草炭、亜炭（若年
炭）アルコール発酵廃棄物等が挙げられ、コークス粉
末、オイルコークス粉末の使用が脱水効果の上で好まし
い。この自燃用燃料は、濃縮泥水・泥土類に対して乾燥
重量比で２〜６％、好ましくは３〜５％混入させる。泥
水・泥土類の中に含まれる有機物は燃料として利用され
る。したがって、自燃用燃料の添加量はスラリー中の有
機物の量を考慮して決定される。燃料分が少な過ぎる
と、焼成が不安定となり、軽量骨材の生成が不良とな
る。また、燃料分が多過ぎると焼成炉中で融着（ブリッ
ジ）や目詰りをお越こして焼成が不完全となる。泥水・
泥土と自燃用燃料は攪拌によって完全に均質に混合され
る。このとき、泥水・泥土は50〜60％の水分を含んでお
り、攪拌によって均質に混練される。また、場合によっ
ては自燃用燃料と共に過プレス助剤が投入される。こ
こで過プレス助剤は、後工程の機械的脱水を補助して
効果的なものとするためのもので、２〜40mmのケイ藻土
微粉、焼成パーライト微粉、ふっ石（ゼオライト）微
粉、大谷石微粉、コークス微粉等の使用が好ましい。
尚、自燃用燃料や過プレス助剤の混入は泥水・泥土類
の固形分を沈泥させて上澄水と分離する前の状態で行な
っても良い。After draining the water, an appropriate amount of self-burning fuel is mixed into the concentrated mud / soil 9 and stirred. Here, as the self-combustion fuel, pulverized coal,
Examples include coke powder, oil coke powder, chaff, sawdust, jute waste, bacas, peat, grass charcoal, lignite (juvenile charcoal) alcohol fermentation waste, and use of coke powder and oil coke powder is preferable for dehydration effect. . The self-combustion fuel is mixed in the concentrated mud / mud in a dry weight ratio of 2 to 6%, preferably 3 to 5%. Organic matter contained in mud and mud is used as fuel. Therefore, the amount of self-combustion fuel added is determined in consideration of the amount of organic substances in the slurry. If the fuel content is too low, firing becomes unstable and the production of lightweight aggregate becomes poor. Further, if the fuel content is too large, the firing will be incomplete due to fusion (bridge) and clogging in the firing furnace. muddy water·
The mud and the fuel for self-combustion are completely homogeneously mixed by stirring. At this time, the muddy water / mud contains 50-60% of water, and is homogeneously kneaded by stirring. Further, in some cases, an overpressing aid is added together with the fuel for self-combustion. Here, the overpressing aid is for assisting mechanical dehydration in the subsequent process to make it effective, and is 2-40 mm diatomaceous earth fine powder, calcined perlite fine powder, fluorite (zeolite) fine powder, Otani It is preferable to use stone fine powder, coke fine powder, or the like.
The self-burning fuel and the overpressing aid may be mixed in a state before the solid content of muddy water / mud is siltated and separated from the supernatant water.
所定時間混練された濃縮泥水・泥土類９は高圧ポンプ22
によってフィルタープレス21に圧送され、含水率20〜40
％、好ましくは25〜30％に機械的に脱水され、ケーキ受
け23に集められる。このフィルタープレス21による脱水
は、プレス時間や過プレス助剤によって異なるが、30
〜40％の含水率に止めてもかまわない。後工程において
無機質微粒子の添加等によって25〜30％に水分調整すれ
ば足りる。High-pressure pump 22 for concentrated mud and mud 9 mixed for a predetermined time
It is pumped to the filter press 21 by the water content of 20-40
%, Preferably 25-30% mechanically dewatered and collected in cake pan 23. Dehydration with this filter press 21 depends on the pressing time and overpress aid, but
Moisture content of ~ 40% is acceptable. It is sufficient to adjust the water content to 25 to 30% by adding inorganic fine particles in the subsequent step.
フィルタープレス21において脱水された泥水・泥土類の
ケーキ29は、充分に水分が下げられていない場合等に
は、必要に応じてニーダー25に送られ、無機質の微粒子
例えば石炭灰等と混練して次工程の押出し成形が可能な
限り少ない水分まで含有平均水分を下げる。そして、カ
ッターを備える押出し成形機26に送られて、所定の大き
さの粒に造粒される。ここで、所定の大きさとは、後工
程の焼成に適した大きさで、例えば５〜20mmの粒子径で
ある。一定の大きさの粒子に成形された泥土類は更に強
度を増すため等の必要に応じてバンドドライヤ27等を利
用して水分を10％程度に下げる。The muddy water / mud cake 29 dehydrated in the filter press 21 is sent to the kneader 25 if necessary when the water content is not sufficiently lowered, and kneaded with inorganic fine particles such as coal ash. The average water content is lowered to the lowest possible water content in the extrusion molding in the next step. Then, it is sent to an extrusion molding machine 26 equipped with a cutter and granulated into particles of a predetermined size. Here, the predetermined size is a size suitable for firing in a later step, and has a particle diameter of, for example, 5 to 20 mm. If necessary, for example, to increase the strength of the mud formed into particles of a certain size, the band dryer 27 is used to reduce the water content to about 10%.
バンドドライヤ27において含水率10％程度に下げられた
泥水・泥土類の粒子はふるい28にかけられ、更に大きさ
が整えられて焼成用キルン30に搬入される。The muddy water / mud particles whose water content has been reduced to about 10% in the band dryer 27 are passed through a sieve 28, further sized and carried into a firing kiln 30.
キルン30では泥水・泥土類の固形中の自燃用燃料及び有
機質を燃焼させて、残留するSiO2，Al2O3等の無機質成
分を焼結させる。この焼成品の性状は、例えば建設汚泥
におが屑を自燃用燃料として混合した場合には、見掛け
比重1.25、吸水率14.5％で軽量骨材として好適なもので
ある。In the kiln 30, the self-combustion fuel and organic matter in the solids of muddy water and mud are burned to sinter residual inorganic components such as SiO 2 and Al 2 O 3 . The properties of this fired product are suitable as a lightweight aggregate with an apparent specific gravity of 1.25 and a water absorption rate of 14.5% when, for example, sawdust is mixed with construction sludge as a fuel for self-combustion.
そこで、振動ふるい41にかけて製品の大きさ別に選別し
て貯留する。Therefore, the vibrating sieve 41 is used to sort and store the products according to their sizes.
また、建設残土を廃棄処理する場合には、含水率が泥水
・泥土に比べて著しく低くかつ固形化しているので、一
旦グリズリー11で粉砕し、磁力選別装置12等によって金
属不純物を取除いてから残土置場13に貯留する。そし
て、湿式粉砕ミル14において、適量の水分を加えながら
粉砕して60％以上の水分を有するスラリーとする。そし
て、このスラリーを高圧ポンプ15でトロンメル４に送っ
て大きな固形分をふるい分けし、均質なスラリーとして
バッジ式沈泥槽６に送る。そして上述の処理を施す。In addition, when the construction residual soil is disposed of, the water content is significantly lower than that of muddy water and mud, and it solidifies, so once grind it with the grizzly 11 and remove the metal impurities with the magnetic sorting device 12 etc. The remaining soil storage area 13 is stored. Then, in the wet crushing mill 14, it is crushed while adding an appropriate amount of water to obtain a slurry having a water content of 60% or more. Then, this slurry is sent to the trommel 4 by the high-pressure pump 15 to screen a large solid content, and sent to the badge type silt tank 6 as a homogeneous slurry. Then, the above processing is performed.
尚、トロンメル４から出た洗浄水、沈泥槽６の上澄水８
及びフィルタープレス21の圧縮水は、貯水槽50に集めら
れ、固形分を沈澱分離する一方、pH調整槽51に移して中
和調整した後排水する。貯水槽50の固形分は湿式粉砕ミ
ル14やトロンメル４に循環させる。The washing water from the trommel 4 and the clear water 8 of the silt tank 6
The compressed water of the filter press 21 is collected in the water storage tank 50 to precipitate and separate the solid content, and is transferred to the pH adjusting tank 51 for neutralization adjustment and then drained. The solid content of the water storage tank 50 is circulated to the wet grinding mill 14 and the trommel 4.
（発明の効果） 以上の説明により明らかなように、本発明の泥水・泥土
類の廃棄処理方法は、トンネル工事や基礎杭工事などの
建設産業から発生する含水率50％以上の可燃性物質を全
く含まない無機質の泥水・泥土類を攪拌手段を有する沈
殿槽に投入して沈殿させ、上澄水を除いた後の沈降した
泥水・泥土類に自燃用燃料を混入して攪拌し、均質に混
練した後、沈殿させた濃縮泥水を抽出して機械脱水し造
粒作業に適した水分に調整し、その後造粒すると共に後
の焼成工程に耐えるペレット強度を得る水分に調整した
後、含有する自燃用燃料を燃焼させて焼成し、無機質系
の構造用の人工軽量骨材を製造するようにしているの
で、自燃用燃料が攪拌中に均質に混合された状態で造粒
作業に適した水分にまで脱水され、造粒のための水分を
加えずにそのまま造粒して固めることができることか
ら、水分を乾燥させるための余分な燃料を用いずに無機
質の土成分を焼成するに最低限必要な燃料だけを用いて
構造用人工軽量骨材に変えることができる。しかも、乾
燥した泥水・泥土類の固りに均質に混在する自燃用燃料
の燃焼熱によって、固形物内の無機質成分が焼結し、粒
状物同士の融着や目詰りを起こすことなく無機質系の人
工軽量骨材として焼成される。(Effects of the Invention) As is clear from the above description, the method for disposal of muddy water and mud of the present invention uses combustible substances having a water content of 50% or more generated from the construction industry such as tunnel construction and foundation pile construction. Inorganic muddy water / mud that does not contain at all is charged into a settling tank equipped with a stirring means to cause precipitation, and after the supernatant water is removed, the mud / mud that has settled is mixed with a fuel for self-combustion, stirred and homogeneously mixed. After that, the precipitated concentrated mud water is extracted, mechanically dehydrated and adjusted to a water content suitable for granulation work, and then granulated and adjusted to a water content to obtain pellet strength that will withstand the subsequent firing step, and then self-burning Since the fuel for combustion is burned and fired to produce an artificial lightweight aggregate for an inorganic structure, the self-combusting fuel is mixed homogeneously during stirring to obtain a water content suitable for granulation work. Is dehydrated until adding water for granulation Since it can be granulated and solidified as it is, it will be converted into a structural artificial lightweight aggregate using only the minimum required fuel for firing the inorganic soil component without using extra fuel for drying water. be able to. Moreover, the inorganic components in the solid matter are sintered by the combustion heat of the self-combustion fuel that is homogeneously mixed in the solidity of dry muddy water / mud, and the inorganic material is not fused or clogged between the granular materials. It is fired as an artificial lightweight aggregate.
したがって、従来多額コストをかけて安定固化してから
投棄しない埋設するしか処理の方法がなかった泥水・泥
土を人工骨材の原料として利用することができ、廃棄物
の有効利用と経済的価値の付加が可能となる。Therefore, it is possible to use muddy water or mud as a raw material for artificial aggregates, which had been the only treatment method until it was buried without being discarded after solidification at a large cost, and effective use of waste and economic value. It becomes possible to add.
第１図は本発明の泥水・泥土類の廃棄処置を実施する泥
水・泥土廃棄処理システムの一実施例を示す原理図であ
る。 ６……攪拌沈泥槽、５……攪拌翼、７……廃棄処理対象
たる泥水・泥土類、８……上澄水、９……濃縮泥水・泥
土類、29……機械脱水後のケーキ・廃棄処理物。11……
グリズリー、14……湿式粉砕ミル、21……フィルタープ
レス、26……押出し成形機・カッター、30……焼成用キ
ルンFIG. 1 is a principle diagram showing an embodiment of a muddy water / mud waste disposal system for carrying out the muddy water / mud disposal treatment of the present invention. 6 …… Stirred silt tank, 5 …… Stirring blade, 7 …… Muddy water / mud to be discarded, 8 …… Superior water, 9 …… Concentrated mud / mud, 29 …… Cake after mechanical dewatering Waste disposal. 11 ……
Grizzly, 14 ... Wet grinding mill, 21 ... Filter press, 26 ... Extruder / cutter, 30 ... Firing kiln
Claims (2)
から発生する含水率50％以上の可燃性物質を全く含まな
い無機質の泥水・泥土類を攪拌手段を有する沈殿槽に投
入して沈殿させ、上澄水を除いた後の沈降した泥水・泥
土類に自燃用燃料を上記沈殿槽において混入して攪拌
し、均質に混練した後、この濃縮泥水を抽出して機械脱
水し造粒作業に適した水分に調整し、その後造粒すると
共に後の焼成工程に耐えるペレット強度を得る水分に調
整した後、含有する自燃用燃料を燃焼させて焼成し、無
機質系の構造用の人工軽量骨材を製造することを特徴と
する建設発生泥水・泥土類の廃棄処理方法。[Claim 1] Inorganic mud or mud containing no combustible substances having a water content of 50% or more generated from the construction industry such as tunnel construction or foundation pile construction is put into a settling tank having a stirring means to precipitate. Suitable for granulation work by mixing self-combustion fuel with the settling mud / mud after removing the supernatant water in the settling tank, stirring and homogenizing, then extracting this concentrated mud and mechanically dehydrating it. Water content, then granulate and adjust the water content to obtain a pellet strength that will withstand the subsequent firing process, then burn the self-combusting fuel contained in it to fire it to produce an artificial lightweight aggregate for inorganic structures. A method for disposing of mud and mud generated in construction, which is characterized by manufacturing.
低含水率の土類を粉砕し、かつ水分を加えて一旦含水率
50％以上の泥土にし、それを攪拌手段を有する沈殿槽に
投入して沈殿させ、上澄水を除いた後の沈降した泥水・
泥土類に自燃用燃料を上記沈殿槽において混入して攪拌
し、均質に混練した後、この濃縮泥水を抽出して機械脱
水し、更に造粒作業に適した水分に調整し、その後造粒
すると共に後の焼成工程に耐えるペレット強度を得る水
分に調整した後、含有する自燃用燃料を燃焼させて焼成
し、無機質系の構造用の人工軽量骨材を製造することを
特徴とする建設発生泥水・泥土類の廃棄処理方法。2. A water content which is relatively low as compared with muddy water / mud of construction residual soil, and is crushed, and water is added to the water content once.
Make mud of 50% or more, put it in a settling tank equipped with a stirring means to precipitate it, and remove the supernatant water to settle the mud water.
After mixing self-combustion fuel with mud in the settling tank and stirring the mixture to homogeneity, this concentrated mud is extracted and mechanically dehydrated, and then adjusted to a water content suitable for granulation work, and then granulated. After adjusting the water content to obtain a pellet strength to withstand the subsequent firing process, burn the self-combusting fuel contained therein and fire it to produce an artificial lightweight aggregate for an inorganic structure. -Muds disposal method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27152789A JPH07115034B2 (en) | 1989-10-20 | 1989-10-20 | Disposal method of construction mud and mud |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27152789A JPH07115034B2 (en) | 1989-10-20 | 1989-10-20 | Disposal method of construction mud and mud |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03135500A JPH03135500A (en) | 1991-06-10 |
| JPH07115034B2 true JPH07115034B2 (en) | 1995-12-13 |
Family
ID=17501309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27152789A Expired - Fee Related JPH07115034B2 (en) | 1989-10-20 | 1989-10-20 | Disposal method of construction mud and mud |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07115034B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015123402A (en) * | 2013-12-26 | 2015-07-06 | 山建プラント株式会社 | Waste treatment method, waste treatment apparatus for executing the method, fired pellets manufactured by the method or the apparatus, and bottom sediment improving method using the fired pellets |
| CN107244887B (en) * | 2017-06-01 | 2020-07-21 | 中国石油化工股份有限公司 | Preparation method and application method of water-based drilling cutting adsorption filter material |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62213899A (en) * | 1986-03-13 | 1987-09-19 | Onoda Cement Co Ltd | Method for incinerating sewage sludge |
| JPS6389442A (en) * | 1986-10-01 | 1988-04-20 | 神奈川県 | Manufacture of lightweight fine aggregate |
-
1989
- 1989-10-20 JP JP27152789A patent/JPH07115034B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03135500A (en) | 1991-06-10 |
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